current_cpu_data.loops_per_jiffy = loops_per_jiffy;
- switch (current_cpu_data.type) {
- case CPU_SH7619:
+ switch (current_cpu_data.family) {
+ case CPU_FAMILY_SH2:
*p++ = '2';
break;
- case CPU_SH7201 ... CPU_MXG:
+ case CPU_FAMILY_SH2A:
*p++ = '2';
*p++ = 'a';
break;
- case CPU_SH7705 ... CPU_SH7729:
+ case CPU_FAMILY_SH3:
*p++ = '3';
break;
- case CPU_SH7750 ... CPU_SH4_501:
+ case CPU_FAMILY_SH4:
*p++ = '4';
break;
- case CPU_SH7763 ... CPU_SHX3:
+ case CPU_FAMILY_SH4A:
*p++ = '4';
*p++ = 'a';
break;
- case CPU_SH7343 ... CPU_SH7366:
+ case CPU_FAMILY_SH4AL_DSP:
*p++ = '4';
*p++ = 'a';
*p++ = 'l';
*p++ = 's';
*p++ = 'p';
break;
- case CPU_SH5_101 ... CPU_SH5_103:
+ case CPU_FAMILY_SH5:
*p++ = '6';
*p++ = '4';
break;
- case CPU_SH_NONE:
+ case CPU_FAMILY_UNKNOWN:
/*
- * Specifically use CPU_SH_NONE rather than default:,
- * so we're able to have the compiler whine about
- * unhandled enumerations.
+ * Specifically use CPU_FAMILY_UNKNOWN rather than
+ * default:, so we're able to have the compiler whine
+ * about unhandled enumerations.
*/
break;
}
#ifdef __KERNEL__
-#ifdef CONFIG_CACHE_OFF
+#include <linux/mm.h>
+
/*
- * Nothing to do when the cache is disabled, initial flush and explicit
- * disabling is handled at CPU init time.
+ * Cache flushing:
+ *
+ * - flush_cache_all() flushes entire cache
+ * - flush_cache_mm(mm) flushes the specified mm context's cache lines
+ * - flush_cache_dup mm(mm) handles cache flushing when forking
+ * - flush_cache_page(mm, vmaddr, pfn) flushes a single page
+ * - flush_cache_range(vma, start, end) flushes a range of pages
*
- * See arch/sh/kernel/cpu/init.c:cache_init().
+ * - flush_dcache_page(pg) flushes(wback&invalidates) a page for dcache
+ * - flush_icache_range(start, end) flushes(invalidates) a range for icache
+ * - flush_icache_page(vma, pg) flushes(invalidates) a page for icache
+ * - flush_cache_sigtramp(vaddr) flushes the signal trampoline
*/
-#define p3_cache_init() do { } while (0)
-#define flush_cache_all() do { } while (0)
-#define flush_cache_mm(mm) do { } while (0)
-#define flush_cache_dup_mm(mm) do { } while (0)
-#define flush_cache_range(vma, start, end) do { } while (0)
-#define flush_cache_page(vma, vmaddr, pfn) do { } while (0)
-#define flush_dcache_page(page) do { } while (0)
-#define flush_icache_range(start, end) do { } while (0)
-#define flush_icache_page(vma,pg) do { } while (0)
-#define flush_dcache_mmap_lock(mapping) do { } while (0)
-#define flush_dcache_mmap_unlock(mapping) do { } while (0)
-#define flush_cache_sigtramp(vaddr) do { } while (0)
-#define flush_icache_user_range(vma,pg,adr,len) do { } while (0)
-#define __flush_wback_region(start, size) do { (void)(start); } while (0)
-#define __flush_purge_region(start, size) do { (void)(start); } while (0)
-#define __flush_invalidate_region(start, size) do { (void)(start); } while (0)
-#else
-#include <cpu/cacheflush.h>
+extern void (*local_flush_cache_all)(void *args);
+extern void (*local_flush_cache_mm)(void *args);
+extern void (*local_flush_cache_dup_mm)(void *args);
+extern void (*local_flush_cache_page)(void *args);
+extern void (*local_flush_cache_range)(void *args);
+extern void (*local_flush_dcache_page)(void *args);
+extern void (*local_flush_icache_range)(void *args);
+extern void (*local_flush_icache_page)(void *args);
+extern void (*local_flush_cache_sigtramp)(void *args);
-/*
- * Consistent DMA requires that the __flush_xxx() primitives must be set
- * for any of the enabled non-coherent caches (most of the UP CPUs),
- * regardless of PIPT or VIPT cache configurations.
- */
+static inline void cache_noop(void *args) { }
+
+extern void (*__flush_wback_region)(void *start, int size);
+extern void (*__flush_purge_region)(void *start, int size);
+extern void (*__flush_invalidate_region)(void *start, int size);
+
+extern void flush_cache_all(void);
+extern void flush_cache_mm(struct mm_struct *mm);
+extern void flush_cache_dup_mm(struct mm_struct *mm);
+extern void flush_cache_page(struct vm_area_struct *vma,
+ unsigned long addr, unsigned long pfn);
+extern void flush_cache_range(struct vm_area_struct *vma,
+ unsigned long start, unsigned long end);
+extern void flush_dcache_page(struct page *page);
+extern void flush_icache_range(unsigned long start, unsigned long end);
+extern void flush_icache_page(struct vm_area_struct *vma,
+ struct page *page);
+extern void flush_cache_sigtramp(unsigned long address);
+
+struct flusher_data {
+ struct vm_area_struct *vma;
+ unsigned long addr1, addr2;
+};
-/* Flush (write-back only) a region (smaller than a page) */
-extern void __flush_wback_region(void *start, int size);
-/* Flush (write-back & invalidate) a region (smaller than a page) */
-extern void __flush_purge_region(void *start, int size);
-/* Flush (invalidate only) a region (smaller than a page) */
-extern void __flush_invalidate_region(void *start, int size);
-#endif
+#define ARCH_HAS_FLUSH_ANON_PAGE
+extern void __flush_anon_page(struct page *page, unsigned long);
+
+static inline void flush_anon_page(struct vm_area_struct *vma,
+ struct page *page, unsigned long vmaddr)
+{
+ if (boot_cpu_data.dcache.n_aliases && PageAnon(page))
+ __flush_anon_page(page, vmaddr);
+}
#define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
static inline void flush_kernel_dcache_page(struct page *page)
flush_dcache_page(page);
}
-#if defined(CONFIG_CPU_SH4) && !defined(CONFIG_CACHE_OFF)
extern void copy_to_user_page(struct vm_area_struct *vma,
struct page *page, unsigned long vaddr, void *dst, const void *src,
unsigned long len);
extern void copy_from_user_page(struct vm_area_struct *vma,
struct page *page, unsigned long vaddr, void *dst, const void *src,
unsigned long len);
-#else
-#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
- do { \
- flush_cache_page(vma, vaddr, page_to_pfn(page));\
- memcpy(dst, src, len); \
- flush_icache_user_range(vma, page, vaddr, len); \
- } while (0)
-
-#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
- do { \
- flush_cache_page(vma, vaddr, page_to_pfn(page));\
- memcpy(dst, src, len); \
- } while (0)
-#endif
#define flush_cache_vmap(start, end) flush_cache_all()
#define flush_cache_vunmap(start, end) flush_cache_all()
+#define flush_dcache_mmap_lock(mapping) do { } while (0)
+#define flush_dcache_mmap_unlock(mapping) do { } while (0)
+
+void kmap_coherent_init(void);
+void *kmap_coherent(struct page *page, unsigned long addr);
+void kunmap_coherent(void);
+
+#define PG_dcache_dirty PG_arch_1
+
+void cpu_cache_init(void);
+
#endif /* __KERNEL__ */
#endif /* __ASM_SH_CACHEFLUSH_H */
* We exhaust ASID of this version.
* Flush all TLB and start new cycle.
*/
- flush_tlb_all();
+ local_flush_tlb_all();
#ifdef CONFIG_SUPERH64
/*
extern unsigned long max_low_pfn, min_low_pfn;
extern unsigned long memory_start, memory_end;
-extern void clear_page(void *to);
+static inline unsigned long
+pages_do_alias(unsigned long addr1, unsigned long addr2)
+{
+ return (addr1 ^ addr2) & shm_align_mask;
+}
+
+
+#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
extern void copy_page(void *to, void *from);
-#if !defined(CONFIG_CACHE_OFF) && defined(CONFIG_MMU) && \
- (defined(CONFIG_CPU_SH5) || defined(CONFIG_CPU_SH4) || \
- defined(CONFIG_SH7705_CACHE_32KB))
struct page;
struct vm_area_struct;
-extern void clear_user_page(void *to, unsigned long address, struct page *page);
-extern void copy_user_page(void *to, void *from, unsigned long address,
- struct page *page);
-#if defined(CONFIG_CPU_SH4)
+
extern void copy_user_highpage(struct page *to, struct page *from,
unsigned long vaddr, struct vm_area_struct *vma);
#define __HAVE_ARCH_COPY_USER_HIGHPAGE
-#endif
-#else
-#define clear_user_page(page, vaddr, pg) clear_page(page)
-#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
-#endif
+extern void clear_user_highpage(struct page *page, unsigned long vaddr);
+#define clear_user_highpage clear_user_highpage
/*
* These are used to make use of C type-checking..
#define NEFF_SIGN (1LL << (NEFF - 1))
#define NEFF_MASK (-1LL << NEFF)
+static inline unsigned long long neff_sign_extend(unsigned long val)
+{
+ unsigned long long extended = val;
+ return (extended & NEFF_SIGN) ? (extended | NEFF_MASK) : extended;
+}
+
#ifdef CONFIG_29BIT
#define NPHYS 29
#else
*/
#define pgtable_cache_init() do { } while (0)
-#if !defined(CONFIG_CACHE_OFF) && (defined(CONFIG_CPU_SH4) || \
- defined(CONFIG_SH7705_CACHE_32KB))
-struct mm_struct;
-#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
-pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep);
-#endif
-
struct vm_area_struct;
-extern void update_mmu_cache(struct vm_area_struct * vma,
- unsigned long address, pte_t pte);
+
+extern void __update_cache(struct vm_area_struct *vma,
+ unsigned long address, pte_t pte);
+extern void __update_tlb(struct vm_area_struct *vma,
+ unsigned long address, pte_t pte);
+
+static inline void
+update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t pte)
+{
+ __update_cache(vma, address, pte);
+ __update_tlb(vma, address, pte);
+}
+
extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
extern void paging_init(void);
extern void page_table_range_init(unsigned long start, unsigned long end,
pgd_t *pgd);
-#if !defined(CONFIG_CACHE_OFF) && defined(CONFIG_CPU_SH4) && defined(CONFIG_MMU)
-extern void kmap_coherent_init(void);
-#else
-#define kmap_coherent_init() do { } while (0)
-#endif
-
/* arch/sh/mm/mmap.c */
#define HAVE_ARCH_UNMAPPED_AREA
#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
CPU_SH_NONE
};
+enum cpu_family {
+ CPU_FAMILY_SH2,
+ CPU_FAMILY_SH2A,
+ CPU_FAMILY_SH3,
+ CPU_FAMILY_SH4,
+ CPU_FAMILY_SH4A,
+ CPU_FAMILY_SH4AL_DSP,
+ CPU_FAMILY_SH5,
+ CPU_FAMILY_UNKNOWN,
+};
+
/*
* TLB information structure
*
};
struct sh_cpuinfo {
- unsigned int type;
+ unsigned int type, family;
int cut_major, cut_minor;
unsigned long loops_per_jiffy;
unsigned long asid_cache;
#define AT_VECTOR_SIZE_ARCH 5 /* entries in ARCH_DLINFO */
-#if defined(CONFIG_CPU_SH4A) || defined(CONFIG_CPU_SH5)
-#define __icbi() \
-{ \
- unsigned long __addr; \
- __addr = 0xa8000000; \
- __asm__ __volatile__( \
- "icbi %0\n\t" \
- : /* no output */ \
- : "m" (__m(__addr))); \
-}
-#endif
-
/*
* A brief note on ctrl_barrier(), the control register write barrier.
*
#define mb() __asm__ __volatile__ ("synco": : :"memory")
#define rmb() mb()
#define wmb() __asm__ __volatile__ ("synco": : :"memory")
-#define ctrl_barrier() __icbi()
+#define ctrl_barrier() __icbi(0xa8000000)
#define read_barrier_depends() do { } while(0)
#else
#define mb() __asm__ __volatile__ ("": : :"memory")
#define __restore_dsp(tsk) do { } while (0)
#endif
+#if defined(CONFIG_CPU_SH4A)
+#define __icbi(addr) __asm__ __volatile__ ( "icbi @%0\n\t" : : "r" (addr))
+#else
+#define __icbi(addr) mb()
+#endif
+
+#define __ocbp(addr) __asm__ __volatile__ ( "ocbp @%0\n\t" : : "r" (addr))
+#define __ocbi(addr) __asm__ __volatile__ ( "ocbi @%0\n\t" : : "r" (addr))
+#define __ocbwb(addr) __asm__ __volatile__ ( "ocbwb @%0\n\t" : : "r" (addr))
+
struct task_struct *__switch_to(struct task_struct *prev,
struct task_struct *next);
})
#endif
+static inline reg_size_t register_align(void *val)
+{
+ return (unsigned long)(signed long)val;
+}
+
int handle_unaligned_access(insn_size_t instruction, struct pt_regs *regs,
struct mem_access *ma, int);
#define jump_to_uncached() do { } while (0)
#define back_to_cached() do { } while (0)
+#define __icbi(addr) __asm__ __volatile__ ( "icbi %0, 0\n\t" : : "r" (addr))
+#define __ocbp(addr) __asm__ __volatile__ ( "ocbp %0, 0\n\t" : : "r" (addr))
+#define __ocbi(addr) __asm__ __volatile__ ( "ocbi %0, 0\n\t" : : "r" (addr))
+#define __ocbwb(addr) __asm__ __volatile__ ( "ocbwb %0, 0\n\t" : : "r" (addr))
+
+static inline reg_size_t register_align(void *val)
+{
+ return (unsigned long long)(signed long long)(signed long)val;
+}
+
#endif /* __ASM_SH_SYSTEM_64_H */
#ifdef CONFIG_SUPERH32
typedef u16 insn_size_t;
+typedef u32 reg_size_t;
#else
typedef u32 insn_size_t;
+typedef u64 reg_size_t;
#endif
#endif /* __ASSEMBLY__ */
+++ /dev/null
-/*
- * include/asm-sh/cpu-sh2/cacheflush.h
- *
- * Copyright (C) 2003 Paul Mundt
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- */
-#ifndef __ASM_CPU_SH2_CACHEFLUSH_H
-#define __ASM_CPU_SH2_CACHEFLUSH_H
-
-/*
- * Cache flushing:
- *
- * - flush_cache_all() flushes entire cache
- * - flush_cache_mm(mm) flushes the specified mm context's cache lines
- * - flush_cache_dup mm(mm) handles cache flushing when forking
- * - flush_cache_page(mm, vmaddr, pfn) flushes a single page
- * - flush_cache_range(vma, start, end) flushes a range of pages
- *
- * - flush_dcache_page(pg) flushes(wback&invalidates) a page for dcache
- * - flush_icache_range(start, end) flushes(invalidates) a range for icache
- * - flush_icache_page(vma, pg) flushes(invalidates) a page for icache
- *
- * Caches are indexed (effectively) by physical address on SH-2, so
- * we don't need them.
- */
-#define flush_cache_all() do { } while (0)
-#define flush_cache_mm(mm) do { } while (0)
-#define flush_cache_dup_mm(mm) do { } while (0)
-#define flush_cache_range(vma, start, end) do { } while (0)
-#define flush_cache_page(vma, vmaddr, pfn) do { } while (0)
-#define flush_dcache_page(page) do { } while (0)
-#define flush_dcache_mmap_lock(mapping) do { } while (0)
-#define flush_dcache_mmap_unlock(mapping) do { } while (0)
-#define flush_icache_range(start, end) do { } while (0)
-#define flush_icache_page(vma,pg) do { } while (0)
-#define flush_icache_user_range(vma,pg,adr,len) do { } while (0)
-#define flush_cache_sigtramp(vaddr) do { } while (0)
-
-#define p3_cache_init() do { } while (0)
-
-#endif /* __ASM_CPU_SH2_CACHEFLUSH_H */
+++ /dev/null
-#ifndef __ASM_CPU_SH2A_CACHEFLUSH_H
-#define __ASM_CPU_SH2A_CACHEFLUSH_H
-
-/*
- * Cache flushing:
- *
- * - flush_cache_all() flushes entire cache
- * - flush_cache_mm(mm) flushes the specified mm context's cache lines
- * - flush_cache_dup mm(mm) handles cache flushing when forking
- * - flush_cache_page(mm, vmaddr, pfn) flushes a single page
- * - flush_cache_range(vma, start, end) flushes a range of pages
- *
- * - flush_dcache_page(pg) flushes(wback&invalidates) a page for dcache
- * - flush_icache_range(start, end) flushes(invalidates) a range for icache
- * - flush_icache_page(vma, pg) flushes(invalidates) a page for icache
- *
- * Caches are indexed (effectively) by physical address on SH-2, so
- * we don't need them.
- */
-#define flush_cache_all() do { } while (0)
-#define flush_cache_mm(mm) do { } while (0)
-#define flush_cache_dup_mm(mm) do { } while (0)
-#define flush_cache_range(vma, start, end) do { } while (0)
-#define flush_cache_page(vma, vmaddr, pfn) do { } while (0)
-#define flush_dcache_page(page) do { } while (0)
-#define flush_dcache_mmap_lock(mapping) do { } while (0)
-#define flush_dcache_mmap_unlock(mapping) do { } while (0)
-void flush_icache_range(unsigned long start, unsigned long end);
-#define flush_icache_page(vma,pg) do { } while (0)
-#define flush_icache_user_range(vma,pg,adr,len) do { } while (0)
-#define flush_cache_sigtramp(vaddr) do { } while (0)
-
-#define p3_cache_init() do { } while (0)
-#endif /* __ASM_CPU_SH2A_CACHEFLUSH_H */
+++ /dev/null
-/*
- * include/asm-sh/cpu-sh3/cacheflush.h
- *
- * Copyright (C) 1999 Niibe Yutaka
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- */
-#ifndef __ASM_CPU_SH3_CACHEFLUSH_H
-#define __ASM_CPU_SH3_CACHEFLUSH_H
-
-#if defined(CONFIG_SH7705_CACHE_32KB)
-/* SH7705 is an SH3 processor with 32KB cache. This has alias issues like the
- * SH4. Unlike the SH4 this is a unified cache so we need to do some work
- * in mmap when 'exec'ing a new binary
- */
- /* 32KB cache, 4kb PAGE sizes need to check bit 12 */
-#define CACHE_ALIAS 0x00001000
-
-#define PG_mapped PG_arch_1
-
-void flush_cache_all(void);
-void flush_cache_mm(struct mm_struct *mm);
-#define flush_cache_dup_mm(mm) flush_cache_mm(mm)
-void flush_cache_range(struct vm_area_struct *vma, unsigned long start,
- unsigned long end);
-void flush_cache_page(struct vm_area_struct *vma, unsigned long addr, unsigned long pfn);
-void flush_dcache_page(struct page *pg);
-void flush_icache_range(unsigned long start, unsigned long end);
-void flush_icache_page(struct vm_area_struct *vma, struct page *page);
-
-#define flush_dcache_mmap_lock(mapping) do { } while (0)
-#define flush_dcache_mmap_unlock(mapping) do { } while (0)
-
-/* SH3 has unified cache so no special action needed here */
-#define flush_cache_sigtramp(vaddr) do { } while (0)
-#define flush_icache_user_range(vma,pg,adr,len) do { } while (0)
-
-#define p3_cache_init() do { } while (0)
-
-#else
-#include <cpu-common/cpu/cacheflush.h>
-#endif
-
-#endif /* __ASM_CPU_SH3_CACHEFLUSH_H */
+++ /dev/null
-/*
- * include/asm-sh/cpu-sh4/cacheflush.h
- *
- * Copyright (C) 1999 Niibe Yutaka
- * Copyright (C) 2003 Paul Mundt
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- */
-#ifndef __ASM_CPU_SH4_CACHEFLUSH_H
-#define __ASM_CPU_SH4_CACHEFLUSH_H
-
-/*
- * Caches are broken on SH-4 (unless we use write-through
- * caching; in which case they're only semi-broken),
- * so we need them.
- */
-void flush_cache_all(void);
-void flush_dcache_all(void);
-void flush_cache_mm(struct mm_struct *mm);
-#define flush_cache_dup_mm(mm) flush_cache_mm(mm)
-void flush_cache_range(struct vm_area_struct *vma, unsigned long start,
- unsigned long end);
-void flush_cache_page(struct vm_area_struct *vma, unsigned long addr,
- unsigned long pfn);
-void flush_dcache_page(struct page *pg);
-
-#define flush_dcache_mmap_lock(mapping) do { } while (0)
-#define flush_dcache_mmap_unlock(mapping) do { } while (0)
-
-void flush_icache_range(unsigned long start, unsigned long end);
-void flush_icache_user_range(struct vm_area_struct *vma, struct page *page,
- unsigned long addr, int len);
-
-#define flush_icache_page(vma,pg) do { } while (0)
-
-/* Initialization of P3 area for copy_user_page */
-void p3_cache_init(void);
-
-#define PG_mapped PG_arch_1
-
-#endif /* __ASM_CPU_SH4_CACHEFLUSH_H */
+++ /dev/null
-#ifndef __ASM_SH_CPU_SH5_CACHEFLUSH_H
-#define __ASM_SH_CPU_SH5_CACHEFLUSH_H
-
-#ifndef __ASSEMBLY__
-
-struct vm_area_struct;
-struct page;
-struct mm_struct;
-
-extern void flush_cache_all(void);
-extern void flush_cache_mm(struct mm_struct *mm);
-extern void flush_cache_sigtramp(unsigned long vaddr);
-extern void flush_cache_range(struct vm_area_struct *vma, unsigned long start,
- unsigned long end);
-extern void flush_cache_page(struct vm_area_struct *vma, unsigned long addr, unsigned long pfn);
-extern void flush_dcache_page(struct page *pg);
-extern void flush_icache_range(unsigned long start, unsigned long end);
-extern void flush_icache_user_range(struct vm_area_struct *vma,
- struct page *page, unsigned long addr,
- int len);
-
-#define flush_cache_dup_mm(mm) flush_cache_mm(mm)
-
-#define flush_dcache_mmap_lock(mapping) do { } while (0)
-#define flush_dcache_mmap_unlock(mapping) do { } while (0)
-
-#define flush_icache_page(vma, page) do { } while (0)
-void p3_cache_init(void);
-
-#endif /* __ASSEMBLY__ */
-
-#endif /* __ASM_SH_CPU_SH5_CACHEFLUSH_H */
-
cache_init();
if (raw_smp_processor_id() == 0) {
-#ifdef CONFIG_MMU
shm_align_mask = max_t(unsigned long,
current_cpu_data.dcache.way_size - 1,
PAGE_SIZE - 1);
-#endif
/* Boot CPU sets the cache shape */
detect_cache_shape();
*/
boot_cpu_data.dcache.flags |= SH_CACHE_COMBINED;
boot_cpu_data.icache = boot_cpu_data.dcache;
+ boot_cpu_data.family = CPU_FAMILY_SH2;
return 0;
}
int __init detect_cpu_and_cache_system(void)
{
+ boot_cpu_data.family = CPU_FAMILY_SH2A;
+
/* All SH-2A CPUs have support for 16 and 32-bit opcodes.. */
boot_cpu_data.flags |= CPU_HAS_OP32;
#if defined(CONFIG_MMU)
.align 2
ENTRY(tlb_miss_load)
- bra call_dpf
+ bra call_handle_tlbmiss
mov #0, r5
.align 2
ENTRY(tlb_miss_store)
- bra call_dpf
+ bra call_handle_tlbmiss
mov #1, r5
.align 2
ENTRY(initial_page_write)
- bra call_dpf
- mov #1, r5
+ bra call_handle_tlbmiss
+ mov #2, r5
.align 2
ENTRY(tlb_protection_violation_load)
- bra call_dpf
+ bra call_do_page_fault
mov #0, r5
.align 2
ENTRY(tlb_protection_violation_store)
- bra call_dpf
+ bra call_do_page_fault
mov #1, r5
-call_dpf:
+call_handle_tlbmiss:
setup_frame_reg
mov.l 1f, r0
mov r5, r8
mov.l @r0, r6
- mov r6, r9
mov.l 2f, r0
sts pr, r10
jsr @r0
lds r10, pr
rts
nop
-0: mov.l 3f, r0
- mov r9, r6
+0:
mov r8, r5
+call_do_page_fault:
+ mov.l 1f, r0
+ mov.l @r0, r6
+
+ sti
+
+ mov.l 3f, r0
+ mov.l 4f, r1
+ mov r15, r4
jmp @r0
- mov r15, r4
+ lds r1, pr
.align 2
1: .long MMU_TEA
-2: .long __do_page_fault
+2: .long handle_tlbmiss
3: .long do_page_fault
+4: .long ret_from_exception
.align 2
ENTRY(address_error_load)
boot_cpu_data.dcache.flags |= SH_CACHE_COMBINED;
boot_cpu_data.icache = boot_cpu_data.dcache;
+ boot_cpu_data.family = CPU_FAMILY_SH3;
+
return 0;
}
* Setup some generic flags we can probe on SH-4A parts
*/
if (((pvr >> 16) & 0xff) == 0x10) {
- if ((cvr & 0x10000000) == 0)
+ boot_cpu_data.family = CPU_FAMILY_SH4A;
+
+ if ((cvr & 0x10000000) == 0) {
boot_cpu_data.flags |= CPU_HAS_DSP;
+ boot_cpu_data.family = CPU_FAMILY_SH4AL_DSP;
+ }
boot_cpu_data.flags |= CPU_HAS_LLSC | CPU_HAS_PERF_COUNTER;
boot_cpu_data.cut_major = pvr & 0x7f;
} else {
/* And some SH-4 defaults.. */
boot_cpu_data.flags |= CPU_HAS_PTEA;
+ boot_cpu_data.family = CPU_FAMILY_SH4;
}
/* FPU detection works for everyone */
boot_cpu_data.icache.ways = 2;
boot_cpu_data.dcache.ways = 2;
- break;
- default:
- boot_cpu_data.type = CPU_SH_NONE;
break;
}
{
int i;
+ local_timer_setup(0);
+
BUILD_BUG_ON(SMP_MSG_NR >= 8);
for (i = 0; i < SMP_MSG_NR; i++)
/* CPU.VCR aliased at CIR address on SH5-101 */
boot_cpu_data.type = CPU_SH5_101;
+ boot_cpu_data.family = CPU_FAMILY_SH5;
+
/*
* First, setup some sane values for the I-cache.
*/
#include <linux/jiffies.h>
#include <linux/percpu.h>
#include <linux/clockchips.h>
+#include <linux/hardirq.h>
#include <linux/irq.h>
static DEFINE_PER_CPU(struct clock_event_device, local_clockevent);
{
struct clock_event_device *clk = &__get_cpu_var(local_clockevent);
+ irq_enter();
clk->event_handler(clk);
+ irq_exit();
}
static void dummy_timer_set_mode(enum clock_event_mode mode,
struct clock_event_device *clk = &per_cpu(local_clockevent, cpu);
clk->name = "dummy_timer";
- clk->features = CLOCK_EVT_FEAT_DUMMY;
- clk->rating = 200;
+ clk->features = CLOCK_EVT_FEAT_ONESHOT |
+ CLOCK_EVT_FEAT_PERIODIC |
+ CLOCK_EVT_FEAT_DUMMY;
+ clk->rating = 400;
clk->mult = 1;
clk->set_mode = dummy_timer_set_mode;
clk->broadcast = smp_timer_broadcast;
struct task_struct *p, struct pt_regs *regs)
{
struct pt_regs *childregs;
- unsigned long long se; /* Sign extension */
#ifdef CONFIG_SH_FPU
if(last_task_used_math == current) {
*childregs = *regs;
+ /*
+ * Sign extend the edited stack.
+ * Note that thread.pc and thread.pc will stay
+ * 32-bit wide and context switch must take care
+ * of NEFF sign extension.
+ */
if (user_mode(regs)) {
- childregs->regs[15] = usp;
+ childregs->regs[15] = neff_sign_extend(usp);
p->thread.uregs = childregs;
} else {
- childregs->regs[15] = (unsigned long)task_stack_page(p) + THREAD_SIZE;
+ childregs->regs[15] =
+ neff_sign_extend((unsigned long)task_stack_page(p) +
+ THREAD_SIZE);
}
childregs->regs[9] = 0; /* Set return value for child */
p->thread.sp = (unsigned long) childregs;
p->thread.pc = (unsigned long) ret_from_fork;
- /*
- * Sign extend the edited stack.
- * Note that thread.pc and thread.pc will stay
- * 32-bit wide and context switch must take care
- * of NEFF sign extension.
- */
-
- se = childregs->regs[15];
- se = (se & NEFF_SIGN) ? (se | NEFF_MASK) : se;
- childregs->regs[15] = se;
-
return 0;
}
struct sh_cpuinfo cpu_data[NR_CPUS] __read_mostly = {
[0] = {
.type = CPU_SH_NONE,
+ .family = CPU_FAMILY_UNKNOWN,
.loops_per_jiffy = 10000000,
},
};
EXPORT_SYMBOL(flush_dcache_page);
#endif
-#if !defined(CONFIG_CACHE_OFF) && defined(CONFIG_MMU) && \
- (defined(CONFIG_CPU_SH4) || defined(CONFIG_SH7705_CACHE_32KB))
-EXPORT_SYMBOL(clear_user_page);
-#endif
-
#ifdef CONFIG_MCOUNT
DECLARE_EXPORT(mcount);
#endif
#ifdef CONFIG_IPV6
EXPORT_SYMBOL(csum_ipv6_magic);
#endif
-EXPORT_SYMBOL(clear_page);
EXPORT_SYMBOL(copy_page);
EXPORT_SYMBOL(__clear_user);
EXPORT_SYMBOL(_ebss);
EXPORT_SYMBOL(dump_fpu);
EXPORT_SYMBOL(kernel_thread);
-#if !defined(CONFIG_CACHE_OFF) && defined(CONFIG_MMU)
-EXPORT_SYMBOL(clear_user_page);
-#endif
-
-#ifndef CONFIG_CACHE_OFF
-EXPORT_SYMBOL(flush_dcache_page);
-#endif
-
#ifdef CONFIG_VT
EXPORT_SYMBOL(screen_info);
#endif
EXPORT_SYMBOL(__get_user_asm_q);
EXPORT_SYMBOL(__strnlen_user);
EXPORT_SYMBOL(__strncpy_from_user);
-EXPORT_SYMBOL(clear_page);
EXPORT_SYMBOL(__clear_user);
EXPORT_SYMBOL(copy_page);
EXPORT_SYMBOL(__copy_user);
/* Set up to return from userspace. If provided, use a stub
already in userspace. */
if (ka->sa.sa_flags & SA_RESTORER) {
- DEREF_REG_PR = (unsigned long) ka->sa.sa_restorer | 0x1;
-
/*
* On SH5 all edited pointers are subject to NEFF
*/
- DEREF_REG_PR = (DEREF_REG_PR & NEFF_SIGN) ?
- (DEREF_REG_PR | NEFF_MASK) : DEREF_REG_PR;
+ DEREF_REG_PR = neff_sign_extend((unsigned long)
+ ka->sa.sa_restorer | 0x1);
} else {
/*
* Different approach on SH5.
* . being code, linker turns ShMedia bit on, always
* dereference index -1.
*/
- DEREF_REG_PR = (unsigned long) frame->retcode | 0x01;
- DEREF_REG_PR = (DEREF_REG_PR & NEFF_SIGN) ?
- (DEREF_REG_PR | NEFF_MASK) : DEREF_REG_PR;
+ DEREF_REG_PR = neff_sign_extend((unsigned long)
+ frame->retcode | 0x01);
if (__copy_to_user(frame->retcode,
(void *)((unsigned long)sa_default_restorer & (~1)), 16) != 0)
* Set up registers for signal handler.
* All edited pointers are subject to NEFF.
*/
- regs->regs[REG_SP] = (unsigned long) frame;
- regs->regs[REG_SP] = (regs->regs[REG_SP] & NEFF_SIGN) ?
- (regs->regs[REG_SP] | NEFF_MASK) : regs->regs[REG_SP];
+ regs->regs[REG_SP] = neff_sign_extend((unsigned long)frame);
regs->regs[REG_ARG1] = signal; /* Arg for signal handler */
/* FIXME:
regs->regs[REG_ARG2] = (unsigned long long)(unsigned long)(signed long)&frame->sc;
regs->regs[REG_ARG3] = (unsigned long long)(unsigned long)(signed long)&frame->sc;
- regs->pc = (unsigned long) ka->sa.sa_handler;
- regs->pc = (regs->pc & NEFF_SIGN) ? (regs->pc | NEFF_MASK) : regs->pc;
+ regs->pc = neff_sign_extend((unsigned long)ka->sa.sa_handler);
set_fs(USER_DS);
/* Set up to return from userspace. If provided, use a stub
already in userspace. */
if (ka->sa.sa_flags & SA_RESTORER) {
- DEREF_REG_PR = (unsigned long) ka->sa.sa_restorer | 0x1;
-
/*
* On SH5 all edited pointers are subject to NEFF
*/
- DEREF_REG_PR = (DEREF_REG_PR & NEFF_SIGN) ?
- (DEREF_REG_PR | NEFF_MASK) : DEREF_REG_PR;
+ DEREF_REG_PR = neff_sign_extend((unsigned long)
+ ka->sa.sa_restorer | 0x1);
} else {
/*
* Different approach on SH5.
* . being code, linker turns ShMedia bit on, always
* dereference index -1.
*/
-
- DEREF_REG_PR = (unsigned long) frame->retcode | 0x01;
- DEREF_REG_PR = (DEREF_REG_PR & NEFF_SIGN) ?
- (DEREF_REG_PR | NEFF_MASK) : DEREF_REG_PR;
+ DEREF_REG_PR = neff_sign_extend((unsigned long)
+ frame->retcode | 0x01);
if (__copy_to_user(frame->retcode,
(void *)((unsigned long)sa_default_rt_restorer & (~1)), 16) != 0)
goto give_sigsegv;
+ /* Cohere the trampoline with the I-cache. */
flush_icache_range(DEREF_REG_PR-1, DEREF_REG_PR-1+15);
}
* Set up registers for signal handler.
* All edited pointers are subject to NEFF.
*/
- regs->regs[REG_SP] = (unsigned long) frame;
- regs->regs[REG_SP] = (regs->regs[REG_SP] & NEFF_SIGN) ?
- (regs->regs[REG_SP] | NEFF_MASK) : regs->regs[REG_SP];
+ regs->regs[REG_SP] = neff_sign_extend((unsigned long)frame);
regs->regs[REG_ARG1] = signal; /* Arg for signal handler */
regs->regs[REG_ARG2] = (unsigned long long)(unsigned long)(signed long)&frame->info;
regs->regs[REG_ARG3] = (unsigned long long)(unsigned long)(signed long)&frame->uc.uc_mcontext;
- regs->pc = (unsigned long) ka->sa.sa_handler;
- regs->pc = (regs->pc & NEFF_SIGN) ? (regs->pc | NEFF_MASK) : regs->pc;
+ regs->pc = neff_sign_extend((unsigned long)ka->sa.sa_handler);
set_fs(USER_DS);
set_normalized_timespec(&wall_to_monotonic,
-xtime.tv_sec, -xtime.tv_nsec);
-#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
- local_timer_setup(smp_processor_id());
-#endif
-
late_time_init = sh_late_time_init;
}
memcpy-y := memcpy.o
memcpy-$(CONFIG_CPU_SH4) := memcpy-sh4.o
-lib-$(CONFIG_MMU) += copy_page.o clear_page.o
+lib-$(CONFIG_MMU) += copy_page.o __clear_user.o
lib-$(CONFIG_MCOUNT) += mcount.o
lib-y += $(memcpy-y) $(udivsi3-y)
--- /dev/null
+/*
+ * __clear_user_page, __clear_user, clear_page implementation of SuperH
+ *
+ * Copyright (C) 2001 Kaz Kojima
+ * Copyright (C) 2001, 2002 Niibe Yutaka
+ * Copyright (C) 2006 Paul Mundt
+ */
+#include <linux/linkage.h>
+#include <asm/page.h>
+
+ENTRY(__clear_user)
+ !
+ mov #0, r0
+ mov #0xffffffe0, r1
+ !
+ ! r4..(r4+31)&~32 -------- not aligned [ Area 0 ]
+ ! (r4+31)&~32..(r4+r5)&~32 -------- aligned [ Area 1 ]
+ ! (r4+r5)&~32..r4+r5 -------- not aligned [ Area 2 ]
+ !
+ ! Clear area 0
+ mov r4, r2
+ !
+ tst r1, r5 ! length < 32
+ bt .Larea2 ! skip to remainder
+ !
+ add #31, r2
+ and r1, r2
+ cmp/eq r4, r2
+ bt .Larea1
+ mov r2, r3
+ sub r4, r3
+ mov r3, r7
+ mov r4, r2
+ !
+.L0: dt r3
+0: mov.b r0, @r2
+ bf/s .L0
+ add #1, r2
+ !
+ sub r7, r5
+ mov r2, r4
+.Larea1:
+ mov r4, r3
+ add r5, r3
+ and r1, r3
+ cmp/hi r2, r3
+ bf .Larea2
+ !
+ ! Clear area 1
+#if defined(CONFIG_CPU_SH4)
+1: movca.l r0, @r2
+#else
+1: mov.l r0, @r2
+#endif
+ add #4, r2
+2: mov.l r0, @r2
+ add #4, r2
+3: mov.l r0, @r2
+ add #4, r2
+4: mov.l r0, @r2
+ add #4, r2
+5: mov.l r0, @r2
+ add #4, r2
+6: mov.l r0, @r2
+ add #4, r2
+7: mov.l r0, @r2
+ add #4, r2
+8: mov.l r0, @r2
+ add #4, r2
+ cmp/hi r2, r3
+ bt/s 1b
+ nop
+ !
+ ! Clear area 2
+.Larea2:
+ mov r4, r3
+ add r5, r3
+ cmp/hs r3, r2
+ bt/s .Ldone
+ sub r2, r3
+.L2: dt r3
+9: mov.b r0, @r2
+ bf/s .L2
+ add #1, r2
+ !
+.Ldone: rts
+ mov #0, r0 ! return 0 as normal return
+
+ ! return the number of bytes remained
+.Lbad_clear_user:
+ mov r4, r0
+ add r5, r0
+ rts
+ sub r2, r0
+
+.section __ex_table,"a"
+ .align 2
+ .long 0b, .Lbad_clear_user
+ .long 1b, .Lbad_clear_user
+ .long 2b, .Lbad_clear_user
+ .long 3b, .Lbad_clear_user
+ .long 4b, .Lbad_clear_user
+ .long 5b, .Lbad_clear_user
+ .long 6b, .Lbad_clear_user
+ .long 7b, .Lbad_clear_user
+ .long 8b, .Lbad_clear_user
+ .long 9b, .Lbad_clear_user
+.previous
+++ /dev/null
-/*
- * __clear_user_page, __clear_user, clear_page implementation of SuperH
- *
- * Copyright (C) 2001 Kaz Kojima
- * Copyright (C) 2001, 2002 Niibe Yutaka
- * Copyright (C) 2006 Paul Mundt
- */
-#include <linux/linkage.h>
-#include <asm/page.h>
-
-/*
- * clear_page
- * @to: P1 address
- *
- * void clear_page(void *to)
- */
-
-/*
- * r0 --- scratch
- * r4 --- to
- * r5 --- to + PAGE_SIZE
- */
-ENTRY(clear_page)
- mov r4,r5
- mov.l .Llimit,r0
- add r0,r5
- mov #0,r0
- !
-1:
-#if defined(CONFIG_CPU_SH4)
- movca.l r0,@r4
- mov r4,r1
-#else
- mov.l r0,@r4
-#endif
- add #32,r4
- mov.l r0,@-r4
- mov.l r0,@-r4
- mov.l r0,@-r4
- mov.l r0,@-r4
- mov.l r0,@-r4
- mov.l r0,@-r4
- mov.l r0,@-r4
-#if defined(CONFIG_CPU_SH4)
- ocbwb @r1
-#endif
- cmp/eq r5,r4
- bf/s 1b
- add #28,r4
- !
- rts
- nop
-
- .balign 4
-.Llimit: .long (PAGE_SIZE-28)
-
-ENTRY(__clear_user)
- !
- mov #0, r0
- mov #0xffffffe0, r1
- !
- ! r4..(r4+31)&~32 -------- not aligned [ Area 0 ]
- ! (r4+31)&~32..(r4+r5)&~32 -------- aligned [ Area 1 ]
- ! (r4+r5)&~32..r4+r5 -------- not aligned [ Area 2 ]
- !
- ! Clear area 0
- mov r4, r2
- !
- tst r1, r5 ! length < 32
- bt .Larea2 ! skip to remainder
- !
- add #31, r2
- and r1, r2
- cmp/eq r4, r2
- bt .Larea1
- mov r2, r3
- sub r4, r3
- mov r3, r7
- mov r4, r2
- !
-.L0: dt r3
-0: mov.b r0, @r2
- bf/s .L0
- add #1, r2
- !
- sub r7, r5
- mov r2, r4
-.Larea1:
- mov r4, r3
- add r5, r3
- and r1, r3
- cmp/hi r2, r3
- bf .Larea2
- !
- ! Clear area 1
-#if defined(CONFIG_CPU_SH4)
-1: movca.l r0, @r2
-#else
-1: mov.l r0, @r2
-#endif
- add #4, r2
-2: mov.l r0, @r2
- add #4, r2
-3: mov.l r0, @r2
- add #4, r2
-4: mov.l r0, @r2
- add #4, r2
-5: mov.l r0, @r2
- add #4, r2
-6: mov.l r0, @r2
- add #4, r2
-7: mov.l r0, @r2
- add #4, r2
-8: mov.l r0, @r2
- add #4, r2
- cmp/hi r2, r3
- bt/s 1b
- nop
- !
- ! Clear area 2
-.Larea2:
- mov r4, r3
- add r5, r3
- cmp/hs r3, r2
- bt/s .Ldone
- sub r2, r3
-.L2: dt r3
-9: mov.b r0, @r2
- bf/s .L2
- add #1, r2
- !
-.Ldone: rts
- mov #0, r0 ! return 0 as normal return
-
- ! return the number of bytes remained
-.Lbad_clear_user:
- mov r4, r0
- add r5, r0
- rts
- sub r2, r0
-
-.section __ex_table,"a"
- .align 2
- .long 0b, .Lbad_clear_user
- .long 1b, .Lbad_clear_user
- .long 2b, .Lbad_clear_user
- .long 3b, .Lbad_clear_user
- .long 4b, .Lbad_clear_user
- .long 5b, .Lbad_clear_user
- .long 6b, .Lbad_clear_user
- .long 7b, .Lbad_clear_user
- .long 8b, .Lbad_clear_user
- .long 9b, .Lbad_clear_user
-.previous
# Panic should really be compiled as PIC
lib-y := udelay.o dbg.o panic.o memcpy.o memset.o \
- copy_user_memcpy.o copy_page.o clear_page.o strcpy.o strlen.o
+ copy_user_memcpy.o copy_page.o strcpy.o strlen.o
# Extracted from libgcc
lib-y += udivsi3.o udivdi3.o sdivsi3.o
+++ /dev/null
-/*
- Copyright 2003 Richard Curnow, SuperH (UK) Ltd.
-
- This file is subject to the terms and conditions of the GNU General Public
- License. See the file "COPYING" in the main directory of this archive
- for more details.
-
- Tight version of memset for the case of just clearing a page. It turns out
- that having the alloco's spaced out slightly due to the increment/branch
- pair causes them to contend less for access to the cache. Similarly,
- keeping the stores apart from the allocos causes less contention. => Do two
- separate loops. Do multiple stores per loop to amortise the
- increment/branch cost a little.
-
- Parameters:
- r2 : source effective address (start of page)
-
- Always clears 4096 bytes.
-
- Note : alloco guarded by synco to avoid TAKum03020 erratum
-
-*/
-
- .section .text..SHmedia32,"ax"
- .little
-
- .balign 8
- .global clear_page
-clear_page:
- pta/l 1f, tr1
- pta/l 2f, tr2
- ptabs/l r18, tr0
-
- movi 4096, r7
- add r2, r7, r7
- add r2, r63, r6
-1:
- alloco r6, 0
- synco ! TAKum03020
- addi r6, 32, r6
- bgt/l r7, r6, tr1
-
- add r2, r63, r6
-2:
- st.q r6, 0, r63
- st.q r6, 8, r63
- st.q r6, 16, r63
- st.q r6, 24, r63
- addi r6, 32, r6
- bgt/l r7, r6, tr2
-
- blink tr0, r63
-
-
-ifeq ($(CONFIG_SUPERH32),y)
-include ${srctree}/arch/sh/mm/Makefile_32
-else
-include ${srctree}/arch/sh/mm/Makefile_64
+#
+# Makefile for the Linux SuperH-specific parts of the memory manager.
+#
+
+obj-y := cache.o init.o consistent.o mmap.o
+
+cacheops-$(CONFIG_CPU_SH2) := cache-sh2.o
+cacheops-$(CONFIG_CPU_SH2A) := cache-sh2a.o
+cacheops-$(CONFIG_CPU_SH3) := cache-sh3.o
+cacheops-$(CONFIG_CPU_SH4) := cache-sh4.o flush-sh4.o
+cacheops-$(CONFIG_CPU_SH5) := cache-sh5.o flush-sh4.o
+cacheops-$(CONFIG_SH7705_CACHE_32KB) += cache-sh7705.o
+
+obj-y += $(cacheops-y)
+
+mmu-y := nommu.o extable_32.o
+mmu-$(CONFIG_MMU) := extable_$(BITS).o fault_$(BITS).o \
+ ioremap_$(BITS).o kmap.o tlbflush_$(BITS).o
+
+obj-y += $(mmu-y)
+obj-$(CONFIG_DEBUG_FS) += asids-debugfs.o
+
+ifdef CONFIG_DEBUG_FS
+obj-$(CONFIG_CPU_SH4) += cache-debugfs.o
endif
+
+ifdef CONFIG_MMU
+tlb-$(CONFIG_CPU_SH3) := tlb-sh3.o
+tlb-$(CONFIG_CPU_SH4) := tlb-sh4.o
+tlb-$(CONFIG_CPU_SH5) := tlb-sh5.o
+tlb-$(CONFIG_CPU_HAS_PTEAEX) := tlb-pteaex.o
+obj-y += $(tlb-y)
+endif
+
+obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
+obj-$(CONFIG_PMB) += pmb.o
+obj-$(CONFIG_PMB_FIXED) += pmb-fixed.o
+obj-$(CONFIG_NUMA) += numa.o
+
+# Special flags for fault_64.o. This puts restrictions on the number of
+# caller-save registers that the compiler can target when building this file.
+# This is required because the code is called from a context in entry.S where
+# very few registers have been saved in the exception handler (for speed
+# reasons).
+# The caller save registers that have been saved and which can be used are
+# r2,r3,r4,r5 : argument passing
+# r15, r18 : SP and LINK
+# tr0-4 : allow all caller-save TR's. The compiler seems to be able to make
+# use of them, so it's probably beneficial to performance to save them
+# and have them available for it.
+#
+# The resources not listed below are callee save, i.e. the compiler is free to
+# use any of them and will spill them to the stack itself.
+
+CFLAGS_fault_64.o += -ffixed-r7 \
+ -ffixed-r8 -ffixed-r9 -ffixed-r10 -ffixed-r11 -ffixed-r12 \
+ -ffixed-r13 -ffixed-r14 -ffixed-r16 -ffixed-r17 -ffixed-r19 \
+ -ffixed-r20 -ffixed-r21 -ffixed-r22 -ffixed-r23 \
+ -ffixed-r24 -ffixed-r25 -ffixed-r26 -ffixed-r27 \
+ -ffixed-r36 -ffixed-r37 -ffixed-r38 -ffixed-r39 -ffixed-r40 \
+ -ffixed-r41 -ffixed-r42 -ffixed-r43 \
+ -ffixed-r60 -ffixed-r61 -ffixed-r62 \
+ -fomit-frame-pointer
+
+EXTRA_CFLAGS += -Werror
+++ /dev/null
-#
-# Makefile for the Linux SuperH-specific parts of the memory manager.
-#
-
-obj-y := init.o extable_32.o consistent.o mmap.o
-
-ifndef CONFIG_CACHE_OFF
-cache-$(CONFIG_CPU_SH2) := cache-sh2.o
-cache-$(CONFIG_CPU_SH2A) := cache-sh2a.o
-cache-$(CONFIG_CPU_SH3) := cache-sh3.o
-cache-$(CONFIG_CPU_SH4) := cache-sh4.o
-cache-$(CONFIG_SH7705_CACHE_32KB) += cache-sh7705.o
-endif
-
-obj-y += $(cache-y)
-
-mmu-y := tlb-nommu.o pg-nommu.o
-mmu-$(CONFIG_MMU) := fault_32.o tlbflush_32.o ioremap_32.o
-
-obj-y += $(mmu-y)
-obj-$(CONFIG_DEBUG_FS) += asids-debugfs.o
-
-ifdef CONFIG_DEBUG_FS
-obj-$(CONFIG_CPU_SH4) += cache-debugfs.o
-endif
-
-ifdef CONFIG_MMU
-tlb-$(CONFIG_CPU_SH3) := tlb-sh3.o
-tlb-$(CONFIG_CPU_SH4) := tlb-sh4.o
-tlb-$(CONFIG_CPU_HAS_PTEAEX) := tlb-pteaex.o
-obj-y += $(tlb-y)
-ifndef CONFIG_CACHE_OFF
-obj-$(CONFIG_CPU_SH4) += pg-sh4.o
-obj-$(CONFIG_SH7705_CACHE_32KB) += pg-sh7705.o
-endif
-endif
-
-obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
-obj-$(CONFIG_PMB) += pmb.o
-obj-$(CONFIG_PMB_FIXED) += pmb-fixed.o
-obj-$(CONFIG_NUMA) += numa.o
-
-EXTRA_CFLAGS += -Werror
+++ /dev/null
-#
-# Makefile for the Linux SuperH-specific parts of the memory manager.
-#
-
-obj-y := init.o consistent.o mmap.o
-
-mmu-y := tlb-nommu.o pg-nommu.o extable_32.o
-mmu-$(CONFIG_MMU) := fault_64.o ioremap_64.o tlbflush_64.o tlb-sh5.o \
- extable_64.o
-
-ifndef CONFIG_CACHE_OFF
-obj-y += cache-sh5.o
-endif
-
-obj-y += $(mmu-y)
-obj-$(CONFIG_DEBUG_FS) += asids-debugfs.o
-
-obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
-obj-$(CONFIG_NUMA) += numa.o
-
-EXTRA_CFLAGS += -Werror
-
-# Special flags for fault_64.o. This puts restrictions on the number of
-# caller-save registers that the compiler can target when building this file.
-# This is required because the code is called from a context in entry.S where
-# very few registers have been saved in the exception handler (for speed
-# reasons).
-# The caller save registers that have been saved and which can be used are
-# r2,r3,r4,r5 : argument passing
-# r15, r18 : SP and LINK
-# tr0-4 : allow all caller-save TR's. The compiler seems to be able to make
-# use of them, so it's probably beneficial to performance to save them
-# and have them available for it.
-#
-# The resources not listed below are callee save, i.e. the compiler is free to
-# use any of them and will spill them to the stack itself.
-
-CFLAGS_fault_64.o += -ffixed-r7 \
- -ffixed-r8 -ffixed-r9 -ffixed-r10 -ffixed-r11 -ffixed-r12 \
- -ffixed-r13 -ffixed-r14 -ffixed-r16 -ffixed-r17 -ffixed-r19 \
- -ffixed-r20 -ffixed-r21 -ffixed-r22 -ffixed-r23 \
- -ffixed-r24 -ffixed-r25 -ffixed-r26 -ffixed-r27 \
- -ffixed-r36 -ffixed-r37 -ffixed-r38 -ffixed-r39 -ffixed-r40 \
- -ffixed-r41 -ffixed-r42 -ffixed-r43 \
- -ffixed-r60 -ffixed-r61 -ffixed-r62 \
- -fomit-frame-pointer
#include <asm/cacheflush.h>
#include <asm/io.h>
-void __flush_wback_region(void *start, int size)
+static void sh2__flush_wback_region(void *start, int size)
{
unsigned long v;
unsigned long begin, end;
}
}
-void __flush_purge_region(void *start, int size)
+static void sh2__flush_purge_region(void *start, int size)
{
unsigned long v;
unsigned long begin, end;
CACHE_OC_ADDRESS_ARRAY | (v & 0x00000ff0) | 0x00000008);
}
-void __flush_invalidate_region(void *start, int size)
+static void sh2__flush_invalidate_region(void *start, int size)
{
#ifdef CONFIG_CACHE_WRITEBACK
/*
CACHE_OC_ADDRESS_ARRAY | (v & 0x00000ff0) | 0x00000008);
#endif
}
+
+void __init sh2_cache_init(void)
+{
+ __flush_wback_region = sh2__flush_wback_region;
+ __flush_purge_region = sh2__flush_purge_region;
+ __flush_invalidate_region = sh2__flush_invalidate_region;
+}
#include <asm/cacheflush.h>
#include <asm/io.h>
-void __flush_wback_region(void *start, int size)
+static void sh2a__flush_wback_region(void *start, int size)
{
unsigned long v;
unsigned long begin, end;
local_irq_restore(flags);
}
-void __flush_purge_region(void *start, int size)
+static void sh2a__flush_purge_region(void *start, int size)
{
unsigned long v;
unsigned long begin, end;
local_irq_restore(flags);
}
-void __flush_invalidate_region(void *start, int size)
+static void sh2a__flush_invalidate_region(void *start, int size)
{
unsigned long v;
unsigned long begin, end;
}
/* WBack O-Cache and flush I-Cache */
-void flush_icache_range(unsigned long start, unsigned long end)
+static void sh2a_flush_icache_range(void *args)
{
+ struct flusher_data *data = args;
+ unsigned long start, end;
unsigned long v;
- unsigned long flags;
- start = start & ~(L1_CACHE_BYTES-1);
- end = (end + L1_CACHE_BYTES-1) & ~(L1_CACHE_BYTES-1);
+ start = data->addr1 & ~(L1_CACHE_BYTES-1);
+ end = (data->addr2 + L1_CACHE_BYTES-1) & ~(L1_CACHE_BYTES-1);
- local_irq_save(flags);
jump_to_uncached();
for (v = start; v < end; v+=L1_CACHE_BYTES) {
}
}
/* I-Cache invalidate */
- ctrl_outl(addr,
- CACHE_IC_ADDRESS_ARRAY | addr | 0x00000008);
+ ctrl_outl(addr, CACHE_IC_ADDRESS_ARRAY | addr | 0x00000008);
}
back_to_cached();
- local_irq_restore(flags);
+}
+
+void __init sh2a_cache_init(void)
+{
+ local_flush_icache_range = sh2a_flush_icache_range;
+
+ __flush_wback_region = sh2a__flush_wback_region;
+ __flush_purge_region = sh2a__flush_purge_region;
+ __flush_invalidate_region = sh2a__flush_invalidate_region;
}
* SIZE: Size of the region.
*/
-void __flush_wback_region(void *start, int size)
+static void sh3__flush_wback_region(void *start, int size)
{
unsigned long v, j;
unsigned long begin, end;
* START: Virtual Address (U0, P1, or P3)
* SIZE: Size of the region.
*/
-void __flush_purge_region(void *start, int size)
+static void sh3__flush_purge_region(void *start, int size)
{
unsigned long v;
unsigned long begin, end;
}
}
-/*
- * No write back please
- *
- * Except I don't think there's any way to avoid the writeback. So we
- * just alias it to __flush_purge_region(). dwmw2.
- */
-void __flush_invalidate_region(void *start, int size)
- __attribute__((alias("__flush_purge_region")));
+void __init sh3_cache_init(void)
+{
+ __flush_wback_region = sh3__flush_wback_region;
+ __flush_purge_region = sh3__flush_purge_region;
+
+ /*
+ * No write back please
+ *
+ * Except I don't think there's any way to avoid the writeback.
+ * So we just alias it to sh3__flush_purge_region(). dwmw2.
+ */
+ __flush_invalidate_region = sh3__flush_purge_region;
+}
#include <linux/mm.h>
#include <linux/io.h>
#include <linux/mutex.h>
+#include <linux/fs.h>
#include <asm/mmu_context.h>
#include <asm/cacheflush.h>
#define MAX_DCACHE_PAGES 64 /* XXX: Tune for ways */
#define MAX_ICACHE_PAGES 32
-static void __flush_dcache_segment_writethrough(unsigned long start,
- unsigned long extent);
-static void __flush_dcache_segment_1way(unsigned long start,
- unsigned long extent);
-static void __flush_dcache_segment_2way(unsigned long start,
- unsigned long extent);
-static void __flush_dcache_segment_4way(unsigned long start,
- unsigned long extent);
static void __flush_cache_4096(unsigned long addr, unsigned long phys,
unsigned long exec_offset);
static void (*__flush_dcache_segment_fn)(unsigned long, unsigned long) =
(void (*)(unsigned long, unsigned long))0xdeadbeef;
-static void compute_alias(struct cache_info *c)
-{
- c->alias_mask = ((c->sets - 1) << c->entry_shift) & ~(PAGE_SIZE - 1);
- c->n_aliases = c->alias_mask ? (c->alias_mask >> PAGE_SHIFT) + 1 : 0;
-}
-
-static void __init emit_cache_params(void)
-{
- printk("PVR=%08x CVR=%08x PRR=%08x\n",
- ctrl_inl(CCN_PVR),
- ctrl_inl(CCN_CVR),
- ctrl_inl(CCN_PRR));
- printk("I-cache : n_ways=%d n_sets=%d way_incr=%d\n",
- boot_cpu_data.icache.ways,
- boot_cpu_data.icache.sets,
- boot_cpu_data.icache.way_incr);
- printk("I-cache : entry_mask=0x%08x alias_mask=0x%08x n_aliases=%d\n",
- boot_cpu_data.icache.entry_mask,
- boot_cpu_data.icache.alias_mask,
- boot_cpu_data.icache.n_aliases);
- printk("D-cache : n_ways=%d n_sets=%d way_incr=%d\n",
- boot_cpu_data.dcache.ways,
- boot_cpu_data.dcache.sets,
- boot_cpu_data.dcache.way_incr);
- printk("D-cache : entry_mask=0x%08x alias_mask=0x%08x n_aliases=%d\n",
- boot_cpu_data.dcache.entry_mask,
- boot_cpu_data.dcache.alias_mask,
- boot_cpu_data.dcache.n_aliases);
-
- /*
- * Emit Secondary Cache parameters if the CPU has a probed L2.
- */
- if (boot_cpu_data.flags & CPU_HAS_L2_CACHE) {
- printk("S-cache : n_ways=%d n_sets=%d way_incr=%d\n",
- boot_cpu_data.scache.ways,
- boot_cpu_data.scache.sets,
- boot_cpu_data.scache.way_incr);
- printk("S-cache : entry_mask=0x%08x alias_mask=0x%08x n_aliases=%d\n",
- boot_cpu_data.scache.entry_mask,
- boot_cpu_data.scache.alias_mask,
- boot_cpu_data.scache.n_aliases);
- }
-
- if (!__flush_dcache_segment_fn)
- panic("unknown number of cache ways\n");
-}
-
-/*
- * SH-4 has virtually indexed and physically tagged cache.
- */
-void __init p3_cache_init(void)
-{
- unsigned int wt_enabled = !!(__raw_readl(CCR) & CCR_CACHE_WT);
-
- compute_alias(&boot_cpu_data.icache);
- compute_alias(&boot_cpu_data.dcache);
- compute_alias(&boot_cpu_data.scache);
-
- if (wt_enabled) {
- __flush_dcache_segment_fn = __flush_dcache_segment_writethrough;
- goto out;
- }
-
- switch (boot_cpu_data.dcache.ways) {
- case 1:
- __flush_dcache_segment_fn = __flush_dcache_segment_1way;
- break;
- case 2:
- __flush_dcache_segment_fn = __flush_dcache_segment_2way;
- break;
- case 4:
- __flush_dcache_segment_fn = __flush_dcache_segment_4way;
- break;
- default:
- __flush_dcache_segment_fn = NULL;
- break;
- }
-
-out:
- emit_cache_params();
-}
-
-/*
- * Write back the dirty D-caches, but not invalidate them.
- *
- * START: Virtual Address (U0, P1, or P3)
- * SIZE: Size of the region.
- */
-void __flush_wback_region(void *start, int size)
-{
- unsigned long v;
- unsigned long begin, end;
-
- begin = (unsigned long)start & ~(L1_CACHE_BYTES-1);
- end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
- & ~(L1_CACHE_BYTES-1);
- for (v = begin; v < end; v+=L1_CACHE_BYTES) {
- asm volatile("ocbwb %0"
- : /* no output */
- : "m" (__m(v)));
- }
-}
-
-/*
- * Write back the dirty D-caches and invalidate them.
- *
- * START: Virtual Address (U0, P1, or P3)
- * SIZE: Size of the region.
- */
-void __flush_purge_region(void *start, int size)
-{
- unsigned long v;
- unsigned long begin, end;
-
- begin = (unsigned long)start & ~(L1_CACHE_BYTES-1);
- end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
- & ~(L1_CACHE_BYTES-1);
- for (v = begin; v < end; v+=L1_CACHE_BYTES) {
- asm volatile("ocbp %0"
- : /* no output */
- : "m" (__m(v)));
- }
-}
-
-/*
- * No write back please
- */
-void __flush_invalidate_region(void *start, int size)
-{
- unsigned long v;
- unsigned long begin, end;
-
- begin = (unsigned long)start & ~(L1_CACHE_BYTES-1);
- end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
- & ~(L1_CACHE_BYTES-1);
- for (v = begin; v < end; v+=L1_CACHE_BYTES) {
- asm volatile("ocbi %0"
- : /* no output */
- : "m" (__m(v)));
- }
-}
-
/*
* Write back the range of D-cache, and purge the I-cache.
*
* Called from kernel/module.c:sys_init_module and routine for a.out format,
* signal handler code and kprobes code
*/
-void flush_icache_range(unsigned long start, unsigned long end)
+static void sh4_flush_icache_range(void *args)
{
+ struct flusher_data *data = args;
int icacheaddr;
- unsigned long flags, v;
+ unsigned long start, end;
+ unsigned long v;
int i;
- /* If there are too many pages then just blow the caches */
- if (((end - start) >> PAGE_SHIFT) >= MAX_ICACHE_PAGES) {
- flush_cache_all();
- } else {
- /* selectively flush d-cache then invalidate the i-cache */
- /* this is inefficient, so only use for small ranges */
- start &= ~(L1_CACHE_BYTES-1);
- end += L1_CACHE_BYTES-1;
- end &= ~(L1_CACHE_BYTES-1);
-
- local_irq_save(flags);
- jump_to_uncached();
-
- for (v = start; v < end; v+=L1_CACHE_BYTES) {
- asm volatile("ocbwb %0"
- : /* no output */
- : "m" (__m(v)));
-
- icacheaddr = CACHE_IC_ADDRESS_ARRAY | (
- v & cpu_data->icache.entry_mask);
-
- for (i = 0; i < cpu_data->icache.ways;
- i++, icacheaddr += cpu_data->icache.way_incr)
- /* Clear i-cache line valid-bit */
- ctrl_outl(0, icacheaddr);
- }
+ start = data->addr1;
+ end = data->addr2;
+
+ /* If there are too many pages then just blow the caches */
+ if (((end - start) >> PAGE_SHIFT) >= MAX_ICACHE_PAGES) {
+ local_flush_cache_all(args);
+ } else {
+ /* selectively flush d-cache then invalidate the i-cache */
+ /* this is inefficient, so only use for small ranges */
+ start &= ~(L1_CACHE_BYTES-1);
+ end += L1_CACHE_BYTES-1;
+ end &= ~(L1_CACHE_BYTES-1);
+
+ jump_to_uncached();
+
+ for (v = start; v < end; v+=L1_CACHE_BYTES) {
+ __ocbwb(v);
+
+ icacheaddr = CACHE_IC_ADDRESS_ARRAY |
+ (v & cpu_data->icache.entry_mask);
+
+ for (i = 0; i < cpu_data->icache.ways;
+ i++, icacheaddr += cpu_data->icache.way_incr)
+ /* Clear i-cache line valid-bit */
+ ctrl_outl(0, icacheaddr);
+ }
back_to_cached();
- local_irq_restore(flags);
}
}
static inline void flush_cache_4096(unsigned long start,
unsigned long phys)
{
- unsigned long flags, exec_offset = 0;
+ unsigned long exec_offset = 0;
/*
* All types of SH-4 require PC to be in P2 to operate on the I-cache.
(start < CACHE_OC_ADDRESS_ARRAY))
exec_offset = 0x20000000;
- local_irq_save(flags);
__flush_cache_4096(start | SH_CACHE_ASSOC,
P1SEGADDR(phys), exec_offset);
- local_irq_restore(flags);
}
/*
* Write back & invalidate the D-cache of the page.
* (To avoid "alias" issues)
*/
-void flush_dcache_page(struct page *page)
+static void sh4_flush_dcache_page(void *arg)
{
- if (test_bit(PG_mapped, &page->flags)) {
+ struct page *page = arg;
+#ifndef CONFIG_SMP
+ struct address_space *mapping = page_mapping(page);
+
+ if (mapping && !mapping_mapped(mapping))
+ set_bit(PG_dcache_dirty, &page->flags);
+ else
+#endif
+ {
unsigned long phys = PHYSADDR(page_address(page));
unsigned long addr = CACHE_OC_ADDRESS_ARRAY;
int i, n;
/* TODO: Selective icache invalidation through IC address array.. */
static void __uses_jump_to_uncached flush_icache_all(void)
{
- unsigned long flags, ccr;
+ unsigned long ccr;
- local_irq_save(flags);
jump_to_uncached();
/* Flush I-cache */
* back_to_cached() will take care of the barrier for us, don't add
* another one!
*/
-
back_to_cached();
- local_irq_restore(flags);
}
-void flush_dcache_all(void)
+static inline void flush_dcache_all(void)
{
(*__flush_dcache_segment_fn)(0UL, boot_cpu_data.dcache.way_size);
wmb();
}
-void flush_cache_all(void)
+static void sh4_flush_cache_all(void *unused)
{
flush_dcache_all();
flush_icache_all();
*
* Caller takes mm->mmap_sem.
*/
-void flush_cache_mm(struct mm_struct *mm)
+static void sh4_flush_cache_mm(void *arg)
{
+ struct mm_struct *mm = arg;
+
+ if (cpu_context(smp_processor_id(), mm) == NO_CONTEXT)
+ return;
+
/*
* If cache is only 4k-per-way, there are never any 'aliases'. Since
* the cache is physically tagged, the data can just be left in there.
* ADDR: Virtual Address (U0 address)
* PFN: Physical page number
*/
-void flush_cache_page(struct vm_area_struct *vma, unsigned long address,
- unsigned long pfn)
+static void sh4_flush_cache_page(void *args)
{
- unsigned long phys = pfn << PAGE_SHIFT;
+ struct flusher_data *data = args;
+ struct vm_area_struct *vma;
+ unsigned long address, pfn, phys;
unsigned int alias_mask;
+ vma = data->vma;
+ address = data->addr1;
+ pfn = data->addr2;
+ phys = pfn << PAGE_SHIFT;
+
+ if (cpu_context(smp_processor_id(), vma->vm_mm) == NO_CONTEXT)
+ return;
+
alias_mask = boot_cpu_data.dcache.alias_mask;
/* We only need to flush D-cache when we have alias */
* Flushing the cache lines for U0 only isn't enough.
* We need to flush for P1 too, which may contain aliases.
*/
-void flush_cache_range(struct vm_area_struct *vma, unsigned long start,
- unsigned long end)
+static void sh4_flush_cache_range(void *args)
{
+ struct flusher_data *data = args;
+ struct vm_area_struct *vma;
+ unsigned long start, end;
+
+ vma = data->vma;
+ start = data->addr1;
+ end = data->addr2;
+
+ if (cpu_context(smp_processor_id(), vma->vm_mm) == NO_CONTEXT)
+ return;
+
/*
* If cache is only 4k-per-way, there are never any 'aliases'. Since
* the cache is physically tagged, the data can just be left in there.
}
}
-/*
- * flush_icache_user_range
- * @vma: VMA of the process
- * @page: page
- * @addr: U0 address
- * @len: length of the range (< page size)
- */
-void flush_icache_user_range(struct vm_area_struct *vma,
- struct page *page, unsigned long addr, int len)
-{
- flush_cache_page(vma, addr, page_to_pfn(page));
- mb();
-}
-
/**
* __flush_cache_4096
*
a3 += linesz;
} while (a0 < a0e);
}
+
+extern void __weak sh4__flush_region_init(void);
+
+/*
+ * SH-4 has virtually indexed and physically tagged cache.
+ */
+void __init sh4_cache_init(void)
+{
+ unsigned int wt_enabled = !!(__raw_readl(CCR) & CCR_CACHE_WT);
+
+ printk("PVR=%08x CVR=%08x PRR=%08x\n",
+ ctrl_inl(CCN_PVR),
+ ctrl_inl(CCN_CVR),
+ ctrl_inl(CCN_PRR));
+
+ if (wt_enabled)
+ __flush_dcache_segment_fn = __flush_dcache_segment_writethrough;
+ else {
+ switch (boot_cpu_data.dcache.ways) {
+ case 1:
+ __flush_dcache_segment_fn = __flush_dcache_segment_1way;
+ break;
+ case 2:
+ __flush_dcache_segment_fn = __flush_dcache_segment_2way;
+ break;
+ case 4:
+ __flush_dcache_segment_fn = __flush_dcache_segment_4way;
+ break;
+ default:
+ panic("unknown number of cache ways\n");
+ break;
+ }
+ }
+
+ local_flush_icache_range = sh4_flush_icache_range;
+ local_flush_dcache_page = sh4_flush_dcache_page;
+ local_flush_cache_all = sh4_flush_cache_all;
+ local_flush_cache_mm = sh4_flush_cache_mm;
+ local_flush_cache_dup_mm = sh4_flush_cache_mm;
+ local_flush_cache_page = sh4_flush_cache_page;
+ local_flush_cache_range = sh4_flush_cache_range;
+
+ sh4__flush_region_init();
+}
#include <asm/uaccess.h>
#include <asm/mmu_context.h>
+extern void __weak sh4__flush_region_init(void);
+
/* Wired TLB entry for the D-cache */
static unsigned long long dtlb_cache_slot;
-void __init p3_cache_init(void)
-{
- /* Reserve a slot for dcache colouring in the DTLB */
- dtlb_cache_slot = sh64_get_wired_dtlb_entry();
-}
-
-#ifdef CONFIG_DCACHE_DISABLED
-#define sh64_dcache_purge_all() do { } while (0)
-#define sh64_dcache_purge_coloured_phy_page(paddr, eaddr) do { } while (0)
-#define sh64_dcache_purge_user_range(mm, start, end) do { } while (0)
-#define sh64_dcache_purge_phy_page(paddr) do { } while (0)
-#define sh64_dcache_purge_virt_page(mm, eaddr) do { } while (0)
-#endif
-
/*
* The following group of functions deal with mapping and unmapping a
* temporary page into a DTLB slot that has been set aside for exclusive
sh64_setup_dtlb_cache_slot(unsigned long eaddr, unsigned long asid,
unsigned long paddr)
{
- local_irq_disable();
sh64_setup_tlb_slot(dtlb_cache_slot, eaddr, asid, paddr);
}
static inline void sh64_teardown_dtlb_cache_slot(void)
{
sh64_teardown_tlb_slot(dtlb_cache_slot);
- local_irq_enable();
}
-#ifndef CONFIG_ICACHE_DISABLED
static inline void sh64_icache_inv_all(void)
{
unsigned long long addr, flag, data;
- unsigned long flags;
addr = ICCR0;
flag = ICCR0_ICI;
data = 0;
- /* Make this a critical section for safety (probably not strictly necessary.) */
- local_irq_save(flags);
-
/* Without %1 it gets unexplicably wrong */
__asm__ __volatile__ (
"getcfg %3, 0, %0\n\t"
"synci"
: "=&r" (data)
: "0" (data), "r" (flag), "r" (addr));
-
- local_irq_restore(flags);
}
static void sh64_icache_inv_kernel_range(unsigned long start, unsigned long end)
Also, eaddr is page-aligned. */
unsigned int cpu = smp_processor_id();
unsigned long long addr, end_addr;
- unsigned long flags = 0;
unsigned long running_asid, vma_asid;
addr = eaddr;
end_addr = addr + PAGE_SIZE;
running_asid = get_asid();
vma_asid = cpu_asid(cpu, vma->vm_mm);
- if (running_asid != vma_asid) {
- local_irq_save(flags);
+ if (running_asid != vma_asid)
switch_and_save_asid(vma_asid);
- }
+
while (addr < end_addr) {
/* Worth unrolling a little */
__asm__ __volatile__("icbi %0, 0" : : "r" (addr));
__asm__ __volatile__("icbi %0, 96" : : "r" (addr));
addr += 128;
}
- if (running_asid != vma_asid) {
+
+ if (running_asid != vma_asid)
switch_and_save_asid(running_asid);
- local_irq_restore(flags);
- }
}
static void sh64_icache_inv_user_page_range(struct mm_struct *mm,
unsigned long eaddr;
unsigned long after_last_page_start;
unsigned long mm_asid, current_asid;
- unsigned long flags = 0;
mm_asid = cpu_asid(smp_processor_id(), mm);
current_asid = get_asid();
- if (mm_asid != current_asid) {
- /* Switch ASID and run the invalidate loop under cli */
- local_irq_save(flags);
+ if (mm_asid != current_asid)
switch_and_save_asid(mm_asid);
- }
aligned_start = start & PAGE_MASK;
after_last_page_start = PAGE_SIZE + ((end - 1) & PAGE_MASK);
aligned_start = vma->vm_end; /* Skip to start of next region */
}
- if (mm_asid != current_asid) {
+ if (mm_asid != current_asid)
switch_and_save_asid(current_asid);
- local_irq_restore(flags);
- }
}
}
-/*
- * Invalidate a small range of user context I-cache, not necessarily page
- * (or even cache-line) aligned.
- *
- * Since this is used inside ptrace, the ASID in the mm context typically
- * won't match current_asid. We'll have to switch ASID to do this. For
- * safety, and given that the range will be small, do all this under cli.
- *
- * Note, there is a hazard that the ASID in mm->context is no longer
- * actually associated with mm, i.e. if the mm->context has started a new
- * cycle since mm was last active. However, this is just a performance
- * issue: all that happens is that we invalidate lines belonging to
- * another mm, so the owning process has to refill them when that mm goes
- * live again. mm itself can't have any cache entries because there will
- * have been a flush_cache_all when the new mm->context cycle started.
- */
-static void sh64_icache_inv_user_small_range(struct mm_struct *mm,
- unsigned long start, int len)
-{
- unsigned long long eaddr = start;
- unsigned long long eaddr_end = start + len;
- unsigned long current_asid, mm_asid;
- unsigned long flags;
- unsigned long long epage_start;
-
- /*
- * Align to start of cache line. Otherwise, suppose len==8 and
- * start was at 32N+28 : the last 4 bytes wouldn't get invalidated.
- */
- eaddr = L1_CACHE_ALIGN(start);
- eaddr_end = start + len;
-
- mm_asid = cpu_asid(smp_processor_id(), mm);
- local_irq_save(flags);
- current_asid = switch_and_save_asid(mm_asid);
-
- epage_start = eaddr & PAGE_MASK;
-
- while (eaddr < eaddr_end) {
- __asm__ __volatile__("icbi %0, 0" : : "r" (eaddr));
- eaddr += L1_CACHE_BYTES;
- }
- switch_and_save_asid(current_asid);
- local_irq_restore(flags);
-}
-
static void sh64_icache_inv_current_user_range(unsigned long start, unsigned long end)
{
/* The icbi instruction never raises ITLBMISS. i.e. if there's not a
addr += L1_CACHE_BYTES;
}
}
-#endif /* !CONFIG_ICACHE_DISABLED */
-#ifndef CONFIG_DCACHE_DISABLED
/* Buffer used as the target of alloco instructions to purge data from cache
sets by natural eviction. -- RPC */
#define DUMMY_ALLOCO_AREA_SIZE ((L1_CACHE_BYTES << 10) + (1024 * 4))
}
}
-/*
- * Purge the range of addresses from the D-cache.
- *
- * The addresses lie in the superpage mapping. There's no harm if we
- * overpurge at either end - just a small performance loss.
- */
-void __flush_purge_region(void *start, int size)
-{
- unsigned long long ullend, addr, aligned_start;
-
- aligned_start = (unsigned long long)(signed long long)(signed long) start;
- addr = L1_CACHE_ALIGN(aligned_start);
- ullend = (unsigned long long) (signed long long) (signed long) start + size;
-
- while (addr <= ullend) {
- __asm__ __volatile__ ("ocbp %0, 0" : : "r" (addr));
- addr += L1_CACHE_BYTES;
- }
-}
-
-void __flush_wback_region(void *start, int size)
-{
- unsigned long long ullend, addr, aligned_start;
-
- aligned_start = (unsigned long long)(signed long long)(signed long) start;
- addr = L1_CACHE_ALIGN(aligned_start);
- ullend = (unsigned long long) (signed long long) (signed long) start + size;
-
- while (addr < ullend) {
- __asm__ __volatile__ ("ocbwb %0, 0" : : "r" (addr));
- addr += L1_CACHE_BYTES;
- }
-}
-
-void __flush_invalidate_region(void *start, int size)
-{
- unsigned long long ullend, addr, aligned_start;
-
- aligned_start = (unsigned long long)(signed long long)(signed long) start;
- addr = L1_CACHE_ALIGN(aligned_start);
- ullend = (unsigned long long) (signed long long) (signed long) start + size;
-
- while (addr < ullend) {
- __asm__ __volatile__ ("ocbi %0, 0" : : "r" (addr));
- addr += L1_CACHE_BYTES;
- }
-}
-#endif /* !CONFIG_DCACHE_DISABLED */
-
/*
* Invalidate the entire contents of both caches, after writing back to
* memory any dirty data from the D-cache.
*/
-void flush_cache_all(void)
+static void sh5_flush_cache_all(void *unused)
{
sh64_dcache_purge_all();
sh64_icache_inv_all();
* I-cache. This is similar to the lack of action needed in
* flush_tlb_mm - see fault.c.
*/
-void flush_cache_mm(struct mm_struct *mm)
+static void sh5_flush_cache_mm(void *unused)
{
sh64_dcache_purge_all();
}
*
* Note, 'end' is 1 byte beyond the end of the range to flush.
*/
-void flush_cache_range(struct vm_area_struct *vma, unsigned long start,
- unsigned long end)
+static void sh5_flush_cache_range(void *args)
{
- struct mm_struct *mm = vma->vm_mm;
+ struct flusher_data *data = args;
+ struct vm_area_struct *vma;
+ unsigned long start, end;
+
+ vma = data->vma;
+ start = data->addr1;
+ end = data->addr2;
- sh64_dcache_purge_user_range(mm, start, end);
- sh64_icache_inv_user_page_range(mm, start, end);
+ sh64_dcache_purge_user_range(vma->vm_mm, start, end);
+ sh64_icache_inv_user_page_range(vma->vm_mm, start, end);
}
/*
*
* Note, this is called with pte lock held.
*/
-void flush_cache_page(struct vm_area_struct *vma, unsigned long eaddr,
- unsigned long pfn)
+static void sh5_flush_cache_page(void *args)
{
+ struct flusher_data *data = args;
+ struct vm_area_struct *vma;
+ unsigned long eaddr, pfn;
+
+ vma = data->vma;
+ eaddr = data->addr1;
+ pfn = data->addr2;
+
sh64_dcache_purge_phy_page(pfn << PAGE_SHIFT);
if (vma->vm_flags & VM_EXEC)
sh64_icache_inv_user_page(vma, eaddr);
}
-void flush_dcache_page(struct page *page)
+static void sh5_flush_dcache_page(void *page)
{
sh64_dcache_purge_phy_page(page_to_phys(page));
wmb();
* mapping, therefore it's guaranteed that there no cache entries for
* the range in cache sets of the wrong colour.
*/
-void flush_icache_range(unsigned long start, unsigned long end)
+static void sh5_flush_icache_range(void *args)
{
+ struct flusher_data *data = args;
+ unsigned long start, end;
+
+ start = data->addr1;
+ end = data->addr2;
+
__flush_purge_region((void *)start, end);
wmb();
sh64_icache_inv_kernel_range(start, end);
}
-/*
- * Flush the range of user (defined by vma->vm_mm) address space starting
- * at 'addr' for 'len' bytes from the cache. The range does not straddle
- * a page boundary, the unique physical page containing the range is
- * 'page'. This seems to be used mainly for invalidating an address
- * range following a poke into the program text through the ptrace() call
- * from another process (e.g. for BRK instruction insertion).
- */
-void flush_icache_user_range(struct vm_area_struct *vma,
- struct page *page, unsigned long addr, int len)
-{
-
- sh64_dcache_purge_coloured_phy_page(page_to_phys(page), addr);
- mb();
-
- if (vma->vm_flags & VM_EXEC)
- sh64_icache_inv_user_small_range(vma->vm_mm, addr, len);
-}
-
/*
* For the address range [start,end), write back the data from the
* D-cache and invalidate the corresponding region of the I-cache for the
* current process. Used to flush signal trampolines on the stack to
* make them executable.
*/
-void flush_cache_sigtramp(unsigned long vaddr)
+static void sh5_flush_cache_sigtramp(void *vaddr)
{
- unsigned long end = vaddr + L1_CACHE_BYTES;
+ unsigned long end = (unsigned long)vaddr + L1_CACHE_BYTES;
- __flush_wback_region((void *)vaddr, L1_CACHE_BYTES);
+ __flush_wback_region(vaddr, L1_CACHE_BYTES);
wmb();
- sh64_icache_inv_current_user_range(vaddr, end);
-}
-
-#ifdef CONFIG_MMU
-/*
- * These *MUST* lie in an area of virtual address space that's otherwise
- * unused.
- */
-#define UNIQUE_EADDR_START 0xe0000000UL
-#define UNIQUE_EADDR_END 0xe8000000UL
-
-/*
- * Given a physical address paddr, and a user virtual address user_eaddr
- * which will eventually be mapped to it, create a one-off kernel-private
- * eaddr mapped to the same paddr. This is used for creating special
- * destination pages for copy_user_page and clear_user_page.
- */
-static unsigned long sh64_make_unique_eaddr(unsigned long user_eaddr,
- unsigned long paddr)
-{
- static unsigned long current_pointer = UNIQUE_EADDR_START;
- unsigned long coloured_pointer;
-
- if (current_pointer == UNIQUE_EADDR_END) {
- sh64_dcache_purge_all();
- current_pointer = UNIQUE_EADDR_START;
- }
-
- coloured_pointer = (current_pointer & ~CACHE_OC_SYN_MASK) |
- (user_eaddr & CACHE_OC_SYN_MASK);
- sh64_setup_dtlb_cache_slot(coloured_pointer, get_asid(), paddr);
-
- current_pointer += (PAGE_SIZE << CACHE_OC_N_SYNBITS);
-
- return coloured_pointer;
+ sh64_icache_inv_current_user_range((unsigned long)vaddr, end);
}
-static void sh64_copy_user_page_coloured(void *to, void *from,
- unsigned long address)
+void __init sh5_cache_init(void)
{
- void *coloured_to;
+ local_flush_cache_all = sh5_flush_cache_all;
+ local_flush_cache_mm = sh5_flush_cache_mm;
+ local_flush_cache_dup_mm = sh5_flush_cache_mm;
+ local_flush_cache_page = sh5_flush_cache_page;
+ local_flush_cache_range = sh5_flush_cache_range;
+ local_flush_dcache_page = sh5_flush_dcache_page;
+ local_flush_icache_range = sh5_flush_icache_range;
+ local_flush_cache_sigtramp = sh5_flush_cache_sigtramp;
- /*
- * Discard any existing cache entries of the wrong colour. These are
- * present quite often, if the kernel has recently used the page
- * internally, then given it up, then it's been allocated to the user.
- */
- sh64_dcache_purge_coloured_phy_page(__pa(to), (unsigned long)to);
-
- coloured_to = (void *)sh64_make_unique_eaddr(address, __pa(to));
- copy_page(from, coloured_to);
-
- sh64_teardown_dtlb_cache_slot();
-}
-
-static void sh64_clear_user_page_coloured(void *to, unsigned long address)
-{
- void *coloured_to;
-
- /*
- * Discard any existing kernel-originated lines of the wrong
- * colour (as above)
- */
- sh64_dcache_purge_coloured_phy_page(__pa(to), (unsigned long)to);
-
- coloured_to = (void *)sh64_make_unique_eaddr(address, __pa(to));
- clear_page(coloured_to);
-
- sh64_teardown_dtlb_cache_slot();
-}
-
-/*
- * 'from' and 'to' are kernel virtual addresses (within the superpage
- * mapping of the physical RAM). 'address' is the user virtual address
- * where the copy 'to' will be mapped after. This allows a custom
- * mapping to be used to ensure that the new copy is placed in the
- * right cache sets for the user to see it without having to bounce it
- * out via memory. Note however : the call to flush_page_to_ram in
- * (generic)/mm/memory.c:(break_cow) undoes all this good work in that one
- * very important case!
- *
- * TBD : can we guarantee that on every call, any cache entries for
- * 'from' are in the same colour sets as 'address' also? i.e. is this
- * always used just to deal with COW? (I suspect not).
- *
- * There are two possibilities here for when the page 'from' was last accessed:
- * - by the kernel : this is OK, no purge required.
- * - by the/a user (e.g. for break_COW) : need to purge.
- *
- * If the potential user mapping at 'address' is the same colour as
- * 'from' there is no need to purge any cache lines from the 'from'
- * page mapped into cache sets of colour 'address'. (The copy will be
- * accessing the page through 'from').
- */
-void copy_user_page(void *to, void *from, unsigned long address,
- struct page *page)
-{
- if (((address ^ (unsigned long) from) & CACHE_OC_SYN_MASK) != 0)
- sh64_dcache_purge_coloured_phy_page(__pa(from), address);
-
- if (((address ^ (unsigned long) to) & CACHE_OC_SYN_MASK) == 0)
- copy_page(to, from);
- else
- sh64_copy_user_page_coloured(to, from, address);
-}
+ /* Reserve a slot for dcache colouring in the DTLB */
+ dtlb_cache_slot = sh64_get_wired_dtlb_entry();
-/*
- * 'to' is a kernel virtual address (within the superpage mapping of the
- * physical RAM). 'address' is the user virtual address where the 'to'
- * page will be mapped after. This allows a custom mapping to be used to
- * ensure that the new copy is placed in the right cache sets for the
- * user to see it without having to bounce it out via memory.
- */
-void clear_user_page(void *to, unsigned long address, struct page *page)
-{
- if (((address ^ (unsigned long) to) & CACHE_OC_SYN_MASK) == 0)
- clear_page(to);
- else
- sh64_clear_user_page_coloured(to, address);
+ sh4__flush_region_init();
}
-#endif
#include <linux/init.h>
#include <linux/mman.h>
#include <linux/mm.h>
+#include <linux/fs.h>
#include <linux/threads.h>
#include <asm/addrspace.h>
#include <asm/page.h>
*
* Called from kernel/module.c:sys_init_module and routine for a.out format.
*/
-void flush_icache_range(unsigned long start, unsigned long end)
+static void sh7705_flush_icache_range(void *args)
{
+ struct flusher_data *data = args;
+ unsigned long start, end;
+
+ start = data->addr1;
+ end = data->addr2;
+
__flush_wback_region((void *)start, end - start);
}
/*
* Writeback&Invalidate the D-cache of the page
*/
-static void __uses_jump_to_uncached __flush_dcache_page(unsigned long phys)
+static void __flush_dcache_page(unsigned long phys)
{
unsigned long ways, waysize, addrstart;
- unsigned long flags;
phys |= SH_CACHE_VALID;
* potential cache aliasing, therefore the optimisation is probably not
* possible.
*/
- local_irq_save(flags);
jump_to_uncached();
ways = current_cpu_data.dcache.ways;
} while (--ways);
back_to_cached();
- local_irq_restore(flags);
}
/*
* Write back & invalidate the D-cache of the page.
* (To avoid "alias" issues)
*/
-void flush_dcache_page(struct page *page)
+static void sh7705_flush_dcache_page(void *page)
{
- if (test_bit(PG_mapped, &page->flags))
+ struct address_space *mapping = page_mapping(page);
+
+ if (mapping && !mapping_mapped(mapping))
+ set_bit(PG_dcache_dirty, &page->flags);
+ else
__flush_dcache_page(PHYSADDR(page_address(page)));
}
-void __uses_jump_to_uncached flush_cache_all(void)
+static void sh7705_flush_cache_all(void *args)
{
- unsigned long flags;
-
- local_irq_save(flags);
jump_to_uncached();
-
cache_wback_all();
back_to_cached();
- local_irq_restore(flags);
-}
-
-void flush_cache_mm(struct mm_struct *mm)
-{
- /* Is there any good way? */
- /* XXX: possibly call flush_cache_range for each vm area */
- flush_cache_all();
-}
-
-/*
- * Write back and invalidate D-caches.
- *
- * START, END: Virtual Address (U0 address)
- *
- * NOTE: We need to flush the _physical_ page entry.
- * Flushing the cache lines for U0 only isn't enough.
- * We need to flush for P1 too, which may contain aliases.
- */
-void flush_cache_range(struct vm_area_struct *vma, unsigned long start,
- unsigned long end)
-{
-
- /*
- * We could call flush_cache_page for the pages of these range,
- * but it's not efficient (scan the caches all the time...).
- *
- * We can't use A-bit magic, as there's the case we don't have
- * valid entry on TLB.
- */
- flush_cache_all();
}
/*
*
* ADDRESS: Virtual Address (U0 address)
*/
-void flush_cache_page(struct vm_area_struct *vma, unsigned long address,
- unsigned long pfn)
+static void sh7705_flush_cache_page(void *args)
{
+ struct flusher_data *data = args;
+ unsigned long pfn = data->addr2;
+
__flush_dcache_page(pfn << PAGE_SHIFT);
}
* Not entirely sure why this is necessary on SH3 with 32K cache but
* without it we get occasional "Memory fault" when loading a program.
*/
-void flush_icache_page(struct vm_area_struct *vma, struct page *page)
+static void sh7705_flush_icache_page(void *page)
{
__flush_purge_region(page_address(page), PAGE_SIZE);
}
+
+void __init sh7705_cache_init(void)
+{
+ local_flush_icache_range = sh7705_flush_icache_range;
+ local_flush_dcache_page = sh7705_flush_dcache_page;
+ local_flush_cache_all = sh7705_flush_cache_all;
+ local_flush_cache_mm = sh7705_flush_cache_all;
+ local_flush_cache_dup_mm = sh7705_flush_cache_all;
+ local_flush_cache_range = sh7705_flush_cache_all;
+ local_flush_cache_page = sh7705_flush_cache_page;
+ local_flush_icache_page = sh7705_flush_icache_page;
+}
--- /dev/null
+/*
+ * arch/sh/mm/cache.c
+ *
+ * Copyright (C) 1999, 2000, 2002 Niibe Yutaka
+ * Copyright (C) 2002 - 2009 Paul Mundt
+ *
+ * Released under the terms of the GNU GPL v2.0.
+ */
+#include <linux/mm.h>
+#include <linux/init.h>
+#include <linux/mutex.h>
+#include <linux/fs.h>
+#include <linux/smp.h>
+#include <linux/highmem.h>
+#include <linux/module.h>
+#include <asm/mmu_context.h>
+#include <asm/cacheflush.h>
+
+void (*local_flush_cache_all)(void *args) = cache_noop;
+void (*local_flush_cache_mm)(void *args) = cache_noop;
+void (*local_flush_cache_dup_mm)(void *args) = cache_noop;
+void (*local_flush_cache_page)(void *args) = cache_noop;
+void (*local_flush_cache_range)(void *args) = cache_noop;
+void (*local_flush_dcache_page)(void *args) = cache_noop;
+void (*local_flush_icache_range)(void *args) = cache_noop;
+void (*local_flush_icache_page)(void *args) = cache_noop;
+void (*local_flush_cache_sigtramp)(void *args) = cache_noop;
+
+void (*__flush_wback_region)(void *start, int size);
+void (*__flush_purge_region)(void *start, int size);
+void (*__flush_invalidate_region)(void *start, int size);
+
+static inline void noop__flush_region(void *start, int size)
+{
+}
+
+void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
+ unsigned long vaddr, void *dst, const void *src,
+ unsigned long len)
+{
+ if (boot_cpu_data.dcache.n_aliases && page_mapped(page) &&
+ !test_bit(PG_dcache_dirty, &page->flags)) {
+ void *vto = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK);
+ memcpy(vto, src, len);
+ kunmap_coherent();
+ } else {
+ memcpy(dst, src, len);
+ if (boot_cpu_data.dcache.n_aliases)
+ set_bit(PG_dcache_dirty, &page->flags);
+ }
+
+ if (vma->vm_flags & VM_EXEC)
+ flush_cache_page(vma, vaddr, page_to_pfn(page));
+}
+
+void copy_from_user_page(struct vm_area_struct *vma, struct page *page,
+ unsigned long vaddr, void *dst, const void *src,
+ unsigned long len)
+{
+ if (boot_cpu_data.dcache.n_aliases && page_mapped(page) &&
+ !test_bit(PG_dcache_dirty, &page->flags)) {
+ void *vfrom = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK);
+ memcpy(dst, vfrom, len);
+ kunmap_coherent();
+ } else {
+ memcpy(dst, src, len);
+ if (boot_cpu_data.dcache.n_aliases)
+ set_bit(PG_dcache_dirty, &page->flags);
+ }
+}
+
+void copy_user_highpage(struct page *to, struct page *from,
+ unsigned long vaddr, struct vm_area_struct *vma)
+{
+ void *vfrom, *vto;
+
+ vto = kmap_atomic(to, KM_USER1);
+
+ if (boot_cpu_data.dcache.n_aliases && page_mapped(from) &&
+ !test_bit(PG_dcache_dirty, &from->flags)) {
+ vfrom = kmap_coherent(from, vaddr);
+ copy_page(vto, vfrom);
+ kunmap_coherent();
+ } else {
+ vfrom = kmap_atomic(from, KM_USER0);
+ copy_page(vto, vfrom);
+ kunmap_atomic(vfrom, KM_USER0);
+ }
+
+ if (pages_do_alias((unsigned long)vto, vaddr & PAGE_MASK))
+ __flush_wback_region(vto, PAGE_SIZE);
+
+ kunmap_atomic(vto, KM_USER1);
+ /* Make sure this page is cleared on other CPU's too before using it */
+ smp_wmb();
+}
+EXPORT_SYMBOL(copy_user_highpage);
+
+void clear_user_highpage(struct page *page, unsigned long vaddr)
+{
+ void *kaddr = kmap_atomic(page, KM_USER0);
+
+ clear_page(kaddr);
+
+ if (pages_do_alias((unsigned long)kaddr, vaddr & PAGE_MASK))
+ __flush_wback_region(kaddr, PAGE_SIZE);
+
+ kunmap_atomic(kaddr, KM_USER0);
+}
+EXPORT_SYMBOL(clear_user_highpage);
+
+void __update_cache(struct vm_area_struct *vma,
+ unsigned long address, pte_t pte)
+{
+ struct page *page;
+ unsigned long pfn = pte_pfn(pte);
+
+ if (!boot_cpu_data.dcache.n_aliases)
+ return;
+
+ page = pfn_to_page(pfn);
+ if (pfn_valid(pfn) && page_mapping(page)) {
+ int dirty = test_and_clear_bit(PG_dcache_dirty, &page->flags);
+ if (dirty) {
+ unsigned long addr = (unsigned long)page_address(page);
+
+ if (pages_do_alias(addr, address & PAGE_MASK))
+ __flush_wback_region((void *)addr, PAGE_SIZE);
+ }
+ }
+}
+
+void __flush_anon_page(struct page *page, unsigned long vmaddr)
+{
+ unsigned long addr = (unsigned long) page_address(page);
+
+ if (pages_do_alias(addr, vmaddr)) {
+ if (boot_cpu_data.dcache.n_aliases && page_mapped(page) &&
+ !test_bit(PG_dcache_dirty, &page->flags)) {
+ void *kaddr;
+
+ kaddr = kmap_coherent(page, vmaddr);
+ __flush_wback_region((void *)kaddr, PAGE_SIZE);
+ kunmap_coherent();
+ } else
+ __flush_wback_region((void *)addr, PAGE_SIZE);
+ }
+}
+
+void flush_cache_all(void)
+{
+ on_each_cpu(local_flush_cache_all, NULL, 1);
+}
+
+void flush_cache_mm(struct mm_struct *mm)
+{
+ on_each_cpu(local_flush_cache_mm, mm, 1);
+}
+
+void flush_cache_dup_mm(struct mm_struct *mm)
+{
+ on_each_cpu(local_flush_cache_dup_mm, mm, 1);
+}
+
+void flush_cache_page(struct vm_area_struct *vma, unsigned long addr,
+ unsigned long pfn)
+{
+ struct flusher_data data;
+
+ data.vma = vma;
+ data.addr1 = addr;
+ data.addr2 = pfn;
+
+ on_each_cpu(local_flush_cache_page, (void *)&data, 1);
+}
+
+void flush_cache_range(struct vm_area_struct *vma, unsigned long start,
+ unsigned long end)
+{
+ struct flusher_data data;
+
+ data.vma = vma;
+ data.addr1 = start;
+ data.addr2 = end;
+
+ on_each_cpu(local_flush_cache_range, (void *)&data, 1);
+}
+
+void flush_dcache_page(struct page *page)
+{
+ on_each_cpu(local_flush_dcache_page, page, 1);
+}
+
+void flush_icache_range(unsigned long start, unsigned long end)
+{
+ struct flusher_data data;
+
+ data.vma = NULL;
+ data.addr1 = start;
+ data.addr2 = end;
+
+ on_each_cpu(local_flush_icache_range, (void *)&data, 1);
+}
+
+void flush_icache_page(struct vm_area_struct *vma, struct page *page)
+{
+ /* Nothing uses the VMA, so just pass the struct page along */
+ on_each_cpu(local_flush_icache_page, page, 1);
+}
+
+void flush_cache_sigtramp(unsigned long address)
+{
+ on_each_cpu(local_flush_cache_sigtramp, (void *)address, 1);
+}
+
+static void compute_alias(struct cache_info *c)
+{
+ c->alias_mask = ((c->sets - 1) << c->entry_shift) & ~(PAGE_SIZE - 1);
+ c->n_aliases = c->alias_mask ? (c->alias_mask >> PAGE_SHIFT) + 1 : 0;
+}
+
+static void __init emit_cache_params(void)
+{
+ printk(KERN_NOTICE "I-cache : n_ways=%d n_sets=%d way_incr=%d\n",
+ boot_cpu_data.icache.ways,
+ boot_cpu_data.icache.sets,
+ boot_cpu_data.icache.way_incr);
+ printk(KERN_NOTICE "I-cache : entry_mask=0x%08x alias_mask=0x%08x n_aliases=%d\n",
+ boot_cpu_data.icache.entry_mask,
+ boot_cpu_data.icache.alias_mask,
+ boot_cpu_data.icache.n_aliases);
+ printk(KERN_NOTICE "D-cache : n_ways=%d n_sets=%d way_incr=%d\n",
+ boot_cpu_data.dcache.ways,
+ boot_cpu_data.dcache.sets,
+ boot_cpu_data.dcache.way_incr);
+ printk(KERN_NOTICE "D-cache : entry_mask=0x%08x alias_mask=0x%08x n_aliases=%d\n",
+ boot_cpu_data.dcache.entry_mask,
+ boot_cpu_data.dcache.alias_mask,
+ boot_cpu_data.dcache.n_aliases);
+
+ /*
+ * Emit Secondary Cache parameters if the CPU has a probed L2.
+ */
+ if (boot_cpu_data.flags & CPU_HAS_L2_CACHE) {
+ printk(KERN_NOTICE "S-cache : n_ways=%d n_sets=%d way_incr=%d\n",
+ boot_cpu_data.scache.ways,
+ boot_cpu_data.scache.sets,
+ boot_cpu_data.scache.way_incr);
+ printk(KERN_NOTICE "S-cache : entry_mask=0x%08x alias_mask=0x%08x n_aliases=%d\n",
+ boot_cpu_data.scache.entry_mask,
+ boot_cpu_data.scache.alias_mask,
+ boot_cpu_data.scache.n_aliases);
+ }
+}
+
+void __init cpu_cache_init(void)
+{
+ compute_alias(&boot_cpu_data.icache);
+ compute_alias(&boot_cpu_data.dcache);
+ compute_alias(&boot_cpu_data.scache);
+
+ __flush_wback_region = noop__flush_region;
+ __flush_purge_region = noop__flush_region;
+ __flush_invalidate_region = noop__flush_region;
+
+ if (boot_cpu_data.family == CPU_FAMILY_SH2) {
+ extern void __weak sh2_cache_init(void);
+
+ sh2_cache_init();
+ }
+
+ if (boot_cpu_data.family == CPU_FAMILY_SH2A) {
+ extern void __weak sh2a_cache_init(void);
+
+ sh2a_cache_init();
+ }
+
+ if (boot_cpu_data.family == CPU_FAMILY_SH3) {
+ extern void __weak sh3_cache_init(void);
+
+ sh3_cache_init();
+
+ if ((boot_cpu_data.type == CPU_SH7705) &&
+ (boot_cpu_data.dcache.sets == 512)) {
+ extern void __weak sh7705_cache_init(void);
+
+ sh7705_cache_init();
+ }
+ }
+
+ if ((boot_cpu_data.family == CPU_FAMILY_SH4) ||
+ (boot_cpu_data.family == CPU_FAMILY_SH4A) ||
+ (boot_cpu_data.family == CPU_FAMILY_SH4AL_DSP)) {
+ extern void __weak sh4_cache_init(void);
+
+ sh4_cache_init();
+ }
+
+ if (boot_cpu_data.family == CPU_FAMILY_SH5) {
+ extern void __weak sh5_cache_init(void);
+
+ sh5_cache_init();
+ }
+
+ emit_cache_params();
+}
/*
* Called with interrupts disabled.
*/
-asmlinkage int __kprobes __do_page_fault(struct pt_regs *regs,
- unsigned long writeaccess,
- unsigned long address)
+asmlinkage int __kprobes
+handle_tlbmiss(struct pt_regs *regs, unsigned long writeaccess,
+ unsigned long address)
{
pgd_t *pgd;
pud_t *pud;
pmd_t *pmd;
pte_t *pte;
pte_t entry;
- int ret = 1;
/*
* We don't take page faults for P1, P2, and parts of P4, these
pgd = pgd_offset_k(address);
} else {
if (unlikely(address >= TASK_SIZE || !current->mm))
- goto out;
+ return 1;
pgd = pgd_offset(current->mm, address);
}
pud = pud_offset(pgd, address);
if (pud_none_or_clear_bad(pud))
- goto out;
+ return 1;
pmd = pmd_offset(pud, address);
if (pmd_none_or_clear_bad(pmd))
- goto out;
+ return 1;
pte = pte_offset_kernel(pmd, address);
entry = *pte;
if (unlikely(pte_none(entry) || pte_not_present(entry)))
- goto out;
+ return 1;
if (unlikely(writeaccess && !pte_write(entry)))
- goto out;
+ return 1;
if (writeaccess)
entry = pte_mkdirty(entry);
entry = pte_mkyoung(entry);
+ set_pte(pte, entry);
+
#if defined(CONFIG_CPU_SH4) && !defined(CONFIG_SMP)
/*
- * ITLB is not affected by "ldtlb" instruction.
- * So, we need to flush the entry by ourselves.
+ * SH-4 does not set MMUCR.RC to the corresponding TLB entry in
+ * the case of an initial page write exception, so we need to
+ * flush it in order to avoid potential TLB entry duplication.
*/
- local_flush_tlb_one(get_asid(), address & PAGE_MASK);
+ if (writeaccess == 2)
+ local_flush_tlb_one(get_asid(), address & PAGE_MASK);
#endif
- set_pte(pte, entry);
update_mmu_cache(NULL, address, entry);
- ret = 0;
-out:
- return ret;
+ return 0;
}
/*
* Set PTEH register
*/
- pteh = address & MMU_VPN_MASK;
-
- /* Sign extend based on neff. */
-#if (NEFF == 32)
- /* Faster sign extension */
- pteh = (unsigned long long)(signed long long)(signed long)pteh;
-#else
- /* General case */
- pteh = (pteh & NEFF_SIGN) ? (pteh | NEFF_MASK) : pteh;
-#endif
+ pteh = neff_sign_extend(address & MMU_VPN_MASK);
/* Set the ASID. */
pteh |= get_asid() << PTEH_ASID_SHIFT;
--- /dev/null
+#include <linux/mm.h>
+#include <asm/mmu_context.h>
+#include <asm/cacheflush.h>
+
+/*
+ * Write back the dirty D-caches, but not invalidate them.
+ *
+ * START: Virtual Address (U0, P1, or P3)
+ * SIZE: Size of the region.
+ */
+static void sh4__flush_wback_region(void *start, int size)
+{
+ reg_size_t aligned_start, v, cnt, end;
+
+ aligned_start = register_align(start);
+ v = aligned_start & ~(L1_CACHE_BYTES-1);
+ end = (aligned_start + size + L1_CACHE_BYTES-1)
+ & ~(L1_CACHE_BYTES-1);
+ cnt = (end - v) / L1_CACHE_BYTES;
+
+ while (cnt >= 8) {
+ __ocbwb(v); v += L1_CACHE_BYTES;
+ __ocbwb(v); v += L1_CACHE_BYTES;
+ __ocbwb(v); v += L1_CACHE_BYTES;
+ __ocbwb(v); v += L1_CACHE_BYTES;
+ __ocbwb(v); v += L1_CACHE_BYTES;
+ __ocbwb(v); v += L1_CACHE_BYTES;
+ __ocbwb(v); v += L1_CACHE_BYTES;
+ __ocbwb(v); v += L1_CACHE_BYTES;
+ cnt -= 8;
+ }
+
+ while (cnt) {
+ __ocbwb(v); v += L1_CACHE_BYTES;
+ cnt--;
+ }
+}
+
+/*
+ * Write back the dirty D-caches and invalidate them.
+ *
+ * START: Virtual Address (U0, P1, or P3)
+ * SIZE: Size of the region.
+ */
+static void sh4__flush_purge_region(void *start, int size)
+{
+ reg_size_t aligned_start, v, cnt, end;
+
+ aligned_start = register_align(start);
+ v = aligned_start & ~(L1_CACHE_BYTES-1);
+ end = (aligned_start + size + L1_CACHE_BYTES-1)
+ & ~(L1_CACHE_BYTES-1);
+ cnt = (end - v) / L1_CACHE_BYTES;
+
+ while (cnt >= 8) {
+ __ocbp(v); v += L1_CACHE_BYTES;
+ __ocbp(v); v += L1_CACHE_BYTES;
+ __ocbp(v); v += L1_CACHE_BYTES;
+ __ocbp(v); v += L1_CACHE_BYTES;
+ __ocbp(v); v += L1_CACHE_BYTES;
+ __ocbp(v); v += L1_CACHE_BYTES;
+ __ocbp(v); v += L1_CACHE_BYTES;
+ __ocbp(v); v += L1_CACHE_BYTES;
+ cnt -= 8;
+ }
+ while (cnt) {
+ __ocbp(v); v += L1_CACHE_BYTES;
+ cnt--;
+ }
+}
+
+/*
+ * No write back please
+ */
+static void sh4__flush_invalidate_region(void *start, int size)
+{
+ reg_size_t aligned_start, v, cnt, end;
+
+ aligned_start = register_align(start);
+ v = aligned_start & ~(L1_CACHE_BYTES-1);
+ end = (aligned_start + size + L1_CACHE_BYTES-1)
+ & ~(L1_CACHE_BYTES-1);
+ cnt = (end - v) / L1_CACHE_BYTES;
+
+ while (cnt >= 8) {
+ __ocbi(v); v += L1_CACHE_BYTES;
+ __ocbi(v); v += L1_CACHE_BYTES;
+ __ocbi(v); v += L1_CACHE_BYTES;
+ __ocbi(v); v += L1_CACHE_BYTES;
+ __ocbi(v); v += L1_CACHE_BYTES;
+ __ocbi(v); v += L1_CACHE_BYTES;
+ __ocbi(v); v += L1_CACHE_BYTES;
+ __ocbi(v); v += L1_CACHE_BYTES;
+ cnt -= 8;
+ }
+
+ while (cnt) {
+ __ocbi(v); v += L1_CACHE_BYTES;
+ cnt--;
+ }
+}
+
+void __init sh4__flush_region_init(void)
+{
+ __flush_wback_region = sh4__flush_wback_region;
+ __flush_invalidate_region = sh4__flush_invalidate_region;
+ __flush_purge_region = sh4__flush_purge_region;
+}
high_memory = node_high_memory;
}
+ /* Set this up early, so we can take care of the zero page */
+ cpu_cache_init();
+
/* clear the zero-page */
memset(empty_zero_page, 0, PAGE_SIZE);
__flush_wback_region(empty_zero_page, PAGE_SIZE);
datasize >> 10,
initsize >> 10);
- p3_cache_init();
-
/* Initialize the vDSO */
vsyscall_init();
}
--- /dev/null
+/*
+ * arch/sh/mm/kmap.c
+ *
+ * Copyright (C) 1999, 2000, 2002 Niibe Yutaka
+ * Copyright (C) 2002 - 2009 Paul Mundt
+ *
+ * Released under the terms of the GNU GPL v2.0.
+ */
+#include <linux/mm.h>
+#include <linux/init.h>
+#include <linux/mutex.h>
+#include <linux/fs.h>
+#include <linux/highmem.h>
+#include <linux/module.h>
+#include <asm/mmu_context.h>
+#include <asm/cacheflush.h>
+
+#define kmap_get_fixmap_pte(vaddr) \
+ pte_offset_kernel(pmd_offset(pud_offset(pgd_offset_k(vaddr), (vaddr)), (vaddr)), (vaddr))
+
+static pte_t *kmap_coherent_pte;
+
+void __init kmap_coherent_init(void)
+{
+ unsigned long vaddr;
+
+ if (!boot_cpu_data.dcache.n_aliases)
+ return;
+
+ /* cache the first coherent kmap pte */
+ vaddr = __fix_to_virt(FIX_CMAP_BEGIN);
+ kmap_coherent_pte = kmap_get_fixmap_pte(vaddr);
+}
+
+void *kmap_coherent(struct page *page, unsigned long addr)
+{
+ enum fixed_addresses idx;
+ unsigned long vaddr, flags;
+ pte_t pte;
+
+ BUG_ON(test_bit(PG_dcache_dirty, &page->flags));
+
+ inc_preempt_count();
+
+ idx = (addr & current_cpu_data.dcache.alias_mask) >> PAGE_SHIFT;
+ vaddr = __fix_to_virt(FIX_CMAP_END - idx);
+ pte = mk_pte(page, PAGE_KERNEL);
+
+ local_irq_save(flags);
+ flush_tlb_one(get_asid(), vaddr);
+ local_irq_restore(flags);
+
+ update_mmu_cache(NULL, vaddr, pte);
+
+ set_pte(kmap_coherent_pte - (FIX_CMAP_END - idx), pte);
+
+ return (void *)vaddr;
+}
+
+void kunmap_coherent(void)
+{
+ dec_preempt_count();
+ preempt_check_resched();
+}
#include <asm/page.h>
#include <asm/processor.h>
-#ifdef CONFIG_MMU
unsigned long shm_align_mask = PAGE_SIZE - 1; /* Sane caches */
EXPORT_SYMBOL(shm_align_mask);
+#ifdef CONFIG_MMU
/*
* To avoid cache aliases, we map the shared page with same color.
*/
--- /dev/null
+/*
+ * arch/sh/mm/nommu.c
+ *
+ * Various helper routines and stubs for MMUless SH.
+ *
+ * Copyright (C) 2002 - 2009 Paul Mundt
+ *
+ * Released under the terms of the GNU GPL v2.0.
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <asm/pgtable.h>
+#include <asm/tlbflush.h>
+#include <asm/page.h>
+#include <asm/uaccess.h>
+
+/*
+ * Nothing too terribly exciting here ..
+ */
+void copy_page(void *to, void *from)
+{
+ memcpy(to, from, PAGE_SIZE);
+}
+
+__kernel_size_t __copy_user(void *to, const void *from, __kernel_size_t n)
+{
+ memcpy(to, from, n);
+ return 0;
+}
+
+__kernel_size_t __clear_user(void *to, __kernel_size_t n)
+{
+ memset(to, 0, n);
+ return 0;
+}
+
+void local_flush_tlb_all(void)
+{
+ BUG();
+}
+
+void local_flush_tlb_mm(struct mm_struct *mm)
+{
+ BUG();
+}
+
+void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
+ unsigned long end)
+{
+ BUG();
+}
+
+void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
+{
+ BUG();
+}
+
+void local_flush_tlb_one(unsigned long asid, unsigned long page)
+{
+ BUG();
+}
+
+void local_flush_tlb_kernel_range(unsigned long start, unsigned long end)
+{
+ BUG();
+}
+
+void __update_tlb(struct vm_area_struct *vma, unsigned long address, pte_t pte)
+{
+}
+
+void __init kmap_coherent_init(void)
+{
+}
+
+void *kmap_coherent(struct page *page, unsigned long addr)
+{
+ BUG();
+ return NULL;
+}
+
+void kunmap_coherent(void)
+{
+ BUG();
+}
+
+void __init page_table_range_init(unsigned long start, unsigned long end,
+ pgd_t *pgd_base)
+{
+}
+
+void __set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t prot)
+{
+}
+++ /dev/null
-/*
- * arch/sh/mm/pg-nommu.c
- *
- * clear_page()/copy_page() implementation for MMUless SH.
- *
- * Copyright (C) 2003 Paul Mundt
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- */
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <asm/page.h>
-#include <asm/uaccess.h>
-
-void copy_page(void *to, void *from)
-{
- memcpy(to, from, PAGE_SIZE);
-}
-
-void clear_page(void *to)
-{
- memset(to, 0, PAGE_SIZE);
-}
-
-__kernel_size_t __copy_user(void *to, const void *from, __kernel_size_t n)
-{
- memcpy(to, from, n);
- return 0;
-}
-
-__kernel_size_t __clear_user(void *to, __kernel_size_t n)
-{
- memset(to, 0, n);
- return 0;
-}
+++ /dev/null
-/*
- * arch/sh/mm/pg-sh4.c
- *
- * Copyright (C) 1999, 2000, 2002 Niibe Yutaka
- * Copyright (C) 2002 - 2007 Paul Mundt
- *
- * Released under the terms of the GNU GPL v2.0.
- */
-#include <linux/mm.h>
-#include <linux/init.h>
-#include <linux/mutex.h>
-#include <linux/fs.h>
-#include <linux/highmem.h>
-#include <linux/module.h>
-#include <asm/mmu_context.h>
-#include <asm/cacheflush.h>
-
-#define CACHE_ALIAS (current_cpu_data.dcache.alias_mask)
-
-#define kmap_get_fixmap_pte(vaddr) \
- pte_offset_kernel(pmd_offset(pud_offset(pgd_offset_k(vaddr), (vaddr)), (vaddr)), (vaddr))
-
-static pte_t *kmap_coherent_pte;
-
-void __init kmap_coherent_init(void)
-{
- unsigned long vaddr;
-
- /* cache the first coherent kmap pte */
- vaddr = __fix_to_virt(FIX_CMAP_BEGIN);
- kmap_coherent_pte = kmap_get_fixmap_pte(vaddr);
-}
-
-static inline void *kmap_coherent(struct page *page, unsigned long addr)
-{
- enum fixed_addresses idx;
- unsigned long vaddr, flags;
- pte_t pte;
-
- inc_preempt_count();
-
- idx = (addr & current_cpu_data.dcache.alias_mask) >> PAGE_SHIFT;
- vaddr = __fix_to_virt(FIX_CMAP_END - idx);
- pte = mk_pte(page, PAGE_KERNEL);
-
- local_irq_save(flags);
- flush_tlb_one(get_asid(), vaddr);
- local_irq_restore(flags);
-
- update_mmu_cache(NULL, vaddr, pte);
-
- set_pte(kmap_coherent_pte - (FIX_CMAP_END - idx), pte);
-
- return (void *)vaddr;
-}
-
-static inline void kunmap_coherent(struct page *page)
-{
- dec_preempt_count();
- preempt_check_resched();
-}
-
-/*
- * clear_user_page
- * @to: P1 address
- * @address: U0 address to be mapped
- * @page: page (virt_to_page(to))
- */
-void clear_user_page(void *to, unsigned long address, struct page *page)
-{
- __set_bit(PG_mapped, &page->flags);
-
- clear_page(to);
- if ((((address & PAGE_MASK) ^ (unsigned long)to) & CACHE_ALIAS))
- __flush_wback_region(to, PAGE_SIZE);
-}
-
-void copy_to_user_page(struct vm_area_struct *vma, struct page *page,
- unsigned long vaddr, void *dst, const void *src,
- unsigned long len)
-{
- void *vto;
-
- __set_bit(PG_mapped, &page->flags);
-
- vto = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK);
- memcpy(vto, src, len);
- kunmap_coherent(vto);
-
- if (vma->vm_flags & VM_EXEC)
- flush_cache_page(vma, vaddr, page_to_pfn(page));
-}
-
-void copy_from_user_page(struct vm_area_struct *vma, struct page *page,
- unsigned long vaddr, void *dst, const void *src,
- unsigned long len)
-{
- void *vfrom;
-
- __set_bit(PG_mapped, &page->flags);
-
- vfrom = kmap_coherent(page, vaddr) + (vaddr & ~PAGE_MASK);
- memcpy(dst, vfrom, len);
- kunmap_coherent(vfrom);
-}
-
-void copy_user_highpage(struct page *to, struct page *from,
- unsigned long vaddr, struct vm_area_struct *vma)
-{
- void *vfrom, *vto;
-
- __set_bit(PG_mapped, &to->flags);
-
- vto = kmap_atomic(to, KM_USER1);
- vfrom = kmap_coherent(from, vaddr);
- copy_page(vto, vfrom);
- kunmap_coherent(vfrom);
-
- if (((vaddr ^ (unsigned long)vto) & CACHE_ALIAS))
- __flush_wback_region(vto, PAGE_SIZE);
-
- kunmap_atomic(vto, KM_USER1);
- /* Make sure this page is cleared on other CPU's too before using it */
- smp_wmb();
-}
-EXPORT_SYMBOL(copy_user_highpage);
-
-/*
- * For SH-4, we have our own implementation for ptep_get_and_clear
- */
-pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
-{
- pte_t pte = *ptep;
-
- pte_clear(mm, addr, ptep);
- if (!pte_not_present(pte)) {
- unsigned long pfn = pte_pfn(pte);
- if (pfn_valid(pfn)) {
- struct page *page = pfn_to_page(pfn);
- struct address_space *mapping = page_mapping(page);
- if (!mapping || !mapping_writably_mapped(mapping))
- __clear_bit(PG_mapped, &page->flags);
- }
- }
- return pte;
-}
+++ /dev/null
-/*
- * arch/sh/mm/pg-sh7705.c
- *
- * Copyright (C) 1999, 2000 Niibe Yutaka
- * Copyright (C) 2004 Alex Song
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- */
-
-#include <linux/init.h>
-#include <linux/mman.h>
-#include <linux/mm.h>
-#include <linux/threads.h>
-#include <linux/fs.h>
-#include <asm/addrspace.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/processor.h>
-#include <asm/cache.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/pgalloc.h>
-#include <asm/mmu_context.h>
-#include <asm/cacheflush.h>
-
-static inline void __flush_purge_virtual_region(void *p1, void *virt, int size)
-{
- unsigned long v;
- unsigned long begin, end;
- unsigned long p1_begin;
-
-
- begin = L1_CACHE_ALIGN((unsigned long)virt);
- end = L1_CACHE_ALIGN((unsigned long)virt + size);
-
- p1_begin = (unsigned long)p1 & ~(L1_CACHE_BYTES - 1);
-
- /* do this the slow way as we may not have TLB entries
- * for virt yet. */
- for (v = begin; v < end; v += L1_CACHE_BYTES) {
- unsigned long p;
- unsigned long ways, addr;
-
- p = __pa(p1_begin);
-
- ways = current_cpu_data.dcache.ways;
- addr = CACHE_OC_ADDRESS_ARRAY;
-
- do {
- unsigned long data;
-
- addr |= (v & current_cpu_data.dcache.entry_mask);
-
- data = ctrl_inl(addr);
- if ((data & CACHE_PHYSADDR_MASK) ==
- (p & CACHE_PHYSADDR_MASK)) {
- data &= ~(SH_CACHE_UPDATED|SH_CACHE_VALID);
- ctrl_outl(data, addr);
- }
-
- addr += current_cpu_data.dcache.way_incr;
- } while (--ways);
-
- p1_begin += L1_CACHE_BYTES;
- }
-}
-
-/*
- * clear_user_page
- * @to: P1 address
- * @address: U0 address to be mapped
- */
-void clear_user_page(void *to, unsigned long address, struct page *pg)
-{
- struct page *page = virt_to_page(to);
-
- __set_bit(PG_mapped, &page->flags);
- if (((address ^ (unsigned long)to) & CACHE_ALIAS) == 0) {
- clear_page(to);
- __flush_wback_region(to, PAGE_SIZE);
- } else {
- __flush_purge_virtual_region(to,
- (void *)(address & 0xfffff000),
- PAGE_SIZE);
- clear_page(to);
- __flush_wback_region(to, PAGE_SIZE);
- }
-}
-
-/*
- * copy_user_page
- * @to: P1 address
- * @from: P1 address
- * @address: U0 address to be mapped
- */
-void copy_user_page(void *to, void *from, unsigned long address, struct page *pg)
-{
- struct page *page = virt_to_page(to);
-
-
- __set_bit(PG_mapped, &page->flags);
- if (((address ^ (unsigned long)to) & CACHE_ALIAS) == 0) {
- copy_page(to, from);
- __flush_wback_region(to, PAGE_SIZE);
- } else {
- __flush_purge_virtual_region(to,
- (void *)(address & 0xfffff000),
- PAGE_SIZE);
- copy_page(to, from);
- __flush_wback_region(to, PAGE_SIZE);
- }
-}
-
-/*
- * For SH7705, we have our own implementation for ptep_get_and_clear
- * Copied from pg-sh4.c
- */
-pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
-{
- pte_t pte = *ptep;
-
- pte_clear(mm, addr, ptep);
- if (!pte_not_present(pte)) {
- unsigned long pfn = pte_pfn(pte);
- if (pfn_valid(pfn)) {
- struct page *page = pfn_to_page(pfn);
- struct address_space *mapping = page_mapping(page);
- if (!mapping || !mapping_writably_mapped(mapping))
- __clear_bit(PG_mapped, &page->flags);
- }
- }
-
- return pte;
-}
-
+++ /dev/null
-/*
- * arch/sh/mm/tlb-nommu.c
- *
- * TLB Operations for MMUless SH.
- *
- * Copyright (C) 2002 Paul Mundt
- *
- * Released under the terms of the GNU GPL v2.0.
- */
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <asm/pgtable.h>
-#include <asm/tlbflush.h>
-
-/*
- * Nothing too terribly exciting here ..
- */
-void local_flush_tlb_all(void)
-{
- BUG();
-}
-
-void local_flush_tlb_mm(struct mm_struct *mm)
-{
- BUG();
-}
-
-void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
- unsigned long end)
-{
- BUG();
-}
-
-void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
-{
- BUG();
-}
-
-void local_flush_tlb_one(unsigned long asid, unsigned long page)
-{
- BUG();
-}
-
-void local_flush_tlb_kernel_range(unsigned long start, unsigned long end)
-{
- BUG();
-}
-
-void update_mmu_cache(struct vm_area_struct * vma,
- unsigned long address, pte_t pte)
-{
- BUG();
-}
-
-void __init page_table_range_init(unsigned long start, unsigned long end,
- pgd_t *pgd_base)
-{
-}
-
-void __set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t prot)
-{
-}
#include <asm/mmu_context.h>
#include <asm/cacheflush.h>
-void update_mmu_cache(struct vm_area_struct * vma,
- unsigned long address, pte_t pte)
+void __update_tlb(struct vm_area_struct *vma, unsigned long address, pte_t pte)
{
- unsigned long flags;
- unsigned long pteval;
- unsigned long vpn;
+ unsigned long flags, pteval, vpn;
- /* Ptrace may call this routine. */
+ /*
+ * Handle debugger faulting in for debugee.
+ */
if (vma && current->active_mm != vma->vm_mm)
return;
-#ifndef CONFIG_CACHE_OFF
- {
- unsigned long pfn = pte_pfn(pte);
-
- if (pfn_valid(pfn)) {
- struct page *page = pfn_to_page(pfn);
-
- if (!test_bit(PG_mapped, &page->flags)) {
- unsigned long phys = pte_val(pte) & PTE_PHYS_MASK;
- __flush_wback_region((void *)P1SEGADDR(phys),
- PAGE_SIZE);
- __set_bit(PG_mapped, &page->flags);
- }
- }
- }
-#endif
-
local_irq_save(flags);
/* Set PTEH register */
#include <asm/mmu_context.h>
#include <asm/cacheflush.h>
-void update_mmu_cache(struct vm_area_struct * vma,
- unsigned long address, pte_t pte)
+void __update_tlb(struct vm_area_struct *vma, unsigned long address, pte_t pte)
{
- unsigned long flags;
- unsigned long pteval;
- unsigned long vpn;
+ unsigned long flags, pteval, vpn;
- /* Ptrace may call this routine. */
+ /*
+ * Handle debugger faulting in for debugee.
+ */
if (vma && current->active_mm != vma->vm_mm)
return;
-#if defined(CONFIG_SH7705_CACHE_32KB)
- {
- struct page *page = pte_page(pte);
- unsigned long pfn = pte_pfn(pte);
-
- if (pfn_valid(pfn) && !test_bit(PG_mapped, &page->flags)) {
- unsigned long phys = pte_val(pte) & PTE_PHYS_MASK;
-
- __flush_wback_region((void *)P1SEGADDR(phys),
- PAGE_SIZE);
- __set_bit(PG_mapped, &page->flags);
- }
- }
-#endif
-
local_irq_save(flags);
/* Set PTEH register */
for (i = 0; i < ways; i++)
ctrl_outl(data, addr + (i << 8));
}
-
#include <asm/mmu_context.h>
#include <asm/cacheflush.h>
-void update_mmu_cache(struct vm_area_struct * vma,
- unsigned long address, pte_t pte)
+void __update_tlb(struct vm_area_struct *vma, unsigned long address, pte_t pte)
{
- unsigned long flags;
- unsigned long pteval;
- unsigned long vpn;
+ unsigned long flags, pteval, vpn;
- /* Ptrace may call this routine. */
+ /*
+ * Handle debugger faulting in for debugee.
+ */
if (vma && current->active_mm != vma->vm_mm)
return;
-#ifndef CONFIG_CACHE_OFF
- {
- unsigned long pfn = pte_pfn(pte);
-
- if (pfn_valid(pfn)) {
- struct page *page = pfn_to_page(pfn);
-
- if (!test_bit(PG_mapped, &page->flags)) {
- unsigned long phys = pte_val(pte) & PTE_PHYS_MASK;
- __flush_wback_region((void *)P1SEGADDR(phys),
- PAGE_SIZE);
- __set_bit(PG_mapped, &page->flags);
- }
- }
- }
-#endif
-
local_irq_save(flags);
/* Set PTEH register */
* Load up a virtual<->physical translation for @eaddr<->@paddr in the
* pre-allocated TLB slot @config_addr (see sh64_get_wired_dtlb_entry).
*/
-inline void sh64_setup_tlb_slot(unsigned long long config_addr,
- unsigned long eaddr,
- unsigned long asid,
- unsigned long paddr)
+void sh64_setup_tlb_slot(unsigned long long config_addr, unsigned long eaddr,
+ unsigned long asid, unsigned long paddr)
{
unsigned long long pteh, ptel;
- /* Sign extension */
-#if (NEFF == 32)
- pteh = (unsigned long long)(signed long long)(signed long) eaddr;
-#else
-#error "Can't sign extend more than 32 bits yet"
-#endif
+ pteh = neff_sign_extend(eaddr);
pteh &= PAGE_MASK;
pteh |= (asid << PTEH_ASID_SHIFT) | PTEH_VALID;
-#if (NEFF == 32)
- ptel = (unsigned long long)(signed long long)(signed long) paddr;
-#else
-#error "Can't sign extend more than 32 bits yet"
-#endif
+ ptel = neff_sign_extend(paddr);
ptel &= PAGE_MASK;
ptel |= (_PAGE_CACHABLE | _PAGE_READ | _PAGE_WRITE);
*
* Teardown any existing mapping in the TLB slot @config_addr.
*/
-inline void sh64_teardown_tlb_slot(unsigned long long config_addr)
+void sh64_teardown_tlb_slot(unsigned long long config_addr)
__attribute__ ((alias("__flush_tlb_slot")));
goto no_context;
}
-void update_mmu_cache(struct vm_area_struct * vma,
- unsigned long address, pte_t pte)
-{
- /*
- * This appears to get called once for every pte entry that gets
- * established => I don't think it's efficient to try refilling the
- * TLBs with the pages - some may not get accessed even. Also, for
- * executable pages, it is impossible to determine reliably here which
- * TLB they should be mapped into (or both even).
- *
- * So, just do nothing here and handle faults on demand. In the
- * TLBMISS handling case, the refill is now done anyway after the pte
- * has been fixed up, so that deals with most useful cases.
- */
-}
-
void local_flush_tlb_one(unsigned long asid, unsigned long page)
{
unsigned long long match, pteh=0, lpage;
/*
* Sign-extend based on neff.
*/
- lpage = (page & NEFF_SIGN) ? (page | NEFF_MASK) : page;
+ lpage = neff_sign_extend(page);
match = (asid << PTEH_ASID_SHIFT) | PTEH_VALID;
match |= lpage;
/* FIXME: Optimize this later.. */
flush_tlb_all();
}
+
+void __update_tlb(struct vm_area_struct *vma, unsigned long address, pte_t pte)
+{
+}
projects / firefly-linux-kernel-4.4.55.git / commitdiff