-/*
- * linux/arch/m68k/mm/kmap.c
- *
- * Copyright (C) 1997 Roman Hodek
- *
- * 10/01/99 cleaned up the code and changing to the same interface
- * used by other architectures /Roman Zippel
- */
-
-#include <linux/module.h>
-#include <linux/mm.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/types.h>
-#include <linux/slab.h>
-#include <linux/vmalloc.h>
-
-#include <asm/setup.h>
-#include <asm/segment.h>
-#include <asm/page.h>
-#include <asm/pgalloc.h>
-#include <asm/io.h>
-#include <asm/system.h>
-
-#undef DEBUG
-
-#define PTRTREESIZE (256*1024)
-
-/*
- * For 040/060 we can use the virtual memory area like other architectures,
- * but for 020/030 we want to use early termination page descriptor and we
- * can't mix this with normal page descriptors, so we have to copy that code
- * (mm/vmalloc.c) and return appriorate aligned addresses.
- */
-
-#ifdef CPU_M68040_OR_M68060_ONLY
-
-#define IO_SIZE PAGE_SIZE
-
-static inline struct vm_struct *get_io_area(unsigned long size)
-{
- return get_vm_area(size, VM_IOREMAP);
-}
-
-
-static inline void free_io_area(void *addr)
-{
- vfree((void *)(PAGE_MASK & (unsigned long)addr));
-}
-
+#ifdef CONFIG_MMU
+#include "kmap_mm.c"
#else
-
-#define IO_SIZE (256*1024)
-
-static struct vm_struct *iolist;
-
-static struct vm_struct *get_io_area(unsigned long size)
-{
- unsigned long addr;
- struct vm_struct **p, *tmp, *area;
-
- area = kmalloc(sizeof(*area), GFP_KERNEL);
- if (!area)
- return NULL;
- addr = KMAP_START;
- for (p = &iolist; (tmp = *p) ; p = &tmp->next) {
- if (size + addr < (unsigned long)tmp->addr)
- break;
- if (addr > KMAP_END-size) {
- kfree(area);
- return NULL;
- }
- addr = tmp->size + (unsigned long)tmp->addr;
- }
- area->addr = (void *)addr;
- area->size = size + IO_SIZE;
- area->next = *p;
- *p = area;
- return area;
-}
-
-static inline void free_io_area(void *addr)
-{
- struct vm_struct **p, *tmp;
-
- if (!addr)
- return;
- addr = (void *)((unsigned long)addr & -IO_SIZE);
- for (p = &iolist ; (tmp = *p) ; p = &tmp->next) {
- if (tmp->addr == addr) {
- *p = tmp->next;
- __iounmap(tmp->addr, tmp->size);
- kfree(tmp);
- return;
- }
- }
-}
-
+#include "kmap_no.c"
#endif
-
-/*
- * Map some physical address range into the kernel address space.
- */
-/* Rewritten by Andreas Schwab to remove all races. */
-
-void __iomem *__ioremap(unsigned long physaddr, unsigned long size, int cacheflag)
-{
- struct vm_struct *area;
- unsigned long virtaddr, retaddr;
- long offset;
- pgd_t *pgd_dir;
- pmd_t *pmd_dir;
- pte_t *pte_dir;
-
- /*
- * Don't allow mappings that wrap..
- */
- if (!size || physaddr > (unsigned long)(-size))
- return NULL;
-
-#ifdef CONFIG_AMIGA
- if (MACH_IS_AMIGA) {
- if ((physaddr >= 0x40000000) && (physaddr + size < 0x60000000)
- && (cacheflag == IOMAP_NOCACHE_SER))
- return (void __iomem *)physaddr;
- }
-#endif
-
-#ifdef DEBUG
- printk("ioremap: 0x%lx,0x%lx(%d) - ", physaddr, size, cacheflag);
-#endif
- /*
- * Mappings have to be aligned
- */
- offset = physaddr & (IO_SIZE - 1);
- physaddr &= -IO_SIZE;
- size = (size + offset + IO_SIZE - 1) & -IO_SIZE;
-
- /*
- * Ok, go for it..
- */
- area = get_io_area(size);
- if (!area)
- return NULL;
-
- virtaddr = (unsigned long)area->addr;
- retaddr = virtaddr + offset;
-#ifdef DEBUG
- printk("0x%lx,0x%lx,0x%lx", physaddr, virtaddr, retaddr);
-#endif
-
- /*
- * add cache and table flags to physical address
- */
- if (CPU_IS_040_OR_060) {
- physaddr |= (_PAGE_PRESENT | _PAGE_GLOBAL040 |
- _PAGE_ACCESSED | _PAGE_DIRTY);
- switch (cacheflag) {
- case IOMAP_FULL_CACHING:
- physaddr |= _PAGE_CACHE040;
- break;
- case IOMAP_NOCACHE_SER:
- default:
- physaddr |= _PAGE_NOCACHE_S;
- break;
- case IOMAP_NOCACHE_NONSER:
- physaddr |= _PAGE_NOCACHE;
- break;
- case IOMAP_WRITETHROUGH:
- physaddr |= _PAGE_CACHE040W;
- break;
- }
- } else {
- physaddr |= (_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_DIRTY);
- switch (cacheflag) {
- case IOMAP_NOCACHE_SER:
- case IOMAP_NOCACHE_NONSER:
- default:
- physaddr |= _PAGE_NOCACHE030;
- break;
- case IOMAP_FULL_CACHING:
- case IOMAP_WRITETHROUGH:
- break;
- }
- }
-
- while ((long)size > 0) {
-#ifdef DEBUG
- if (!(virtaddr & (PTRTREESIZE-1)))
- printk ("\npa=%#lx va=%#lx ", physaddr, virtaddr);
-#endif
- pgd_dir = pgd_offset_k(virtaddr);
- pmd_dir = pmd_alloc(&init_mm, pgd_dir, virtaddr);
- if (!pmd_dir) {
- printk("ioremap: no mem for pmd_dir\n");
- return NULL;
- }
-
- if (CPU_IS_020_OR_030) {
- pmd_dir->pmd[(virtaddr/PTRTREESIZE) & 15] = physaddr;
- physaddr += PTRTREESIZE;
- virtaddr += PTRTREESIZE;
- size -= PTRTREESIZE;
- } else {
- pte_dir = pte_alloc_kernel(pmd_dir, virtaddr);
- if (!pte_dir) {
- printk("ioremap: no mem for pte_dir\n");
- return NULL;
- }
-
- pte_val(*pte_dir) = physaddr;
- virtaddr += PAGE_SIZE;
- physaddr += PAGE_SIZE;
- size -= PAGE_SIZE;
- }
- }
-#ifdef DEBUG
- printk("\n");
-#endif
- flush_tlb_all();
-
- return (void __iomem *)retaddr;
-}
-EXPORT_SYMBOL(__ioremap);
-
-/*
- * Unmap a ioremap()ed region again
- */
-void iounmap(void __iomem *addr)
-{
-#ifdef CONFIG_AMIGA
- if ((!MACH_IS_AMIGA) ||
- (((unsigned long)addr < 0x40000000) ||
- ((unsigned long)addr > 0x60000000)))
- free_io_area((__force void *)addr);
-#else
- free_io_area((__force void *)addr);
-#endif
-}
-EXPORT_SYMBOL(iounmap);
-
-/*
- * __iounmap unmaps nearly everything, so be careful
- * it doesn't free currently pointer/page tables anymore but it
- * wans't used anyway and might be added later.
- */
-void __iounmap(void *addr, unsigned long size)
-{
- unsigned long virtaddr = (unsigned long)addr;
- pgd_t *pgd_dir;
- pmd_t *pmd_dir;
- pte_t *pte_dir;
-
- while ((long)size > 0) {
- pgd_dir = pgd_offset_k(virtaddr);
- if (pgd_bad(*pgd_dir)) {
- printk("iounmap: bad pgd(%08lx)\n", pgd_val(*pgd_dir));
- pgd_clear(pgd_dir);
- return;
- }
- pmd_dir = pmd_offset(pgd_dir, virtaddr);
-
- if (CPU_IS_020_OR_030) {
- int pmd_off = (virtaddr/PTRTREESIZE) & 15;
- int pmd_type = pmd_dir->pmd[pmd_off] & _DESCTYPE_MASK;
-
- if (pmd_type == _PAGE_PRESENT) {
- pmd_dir->pmd[pmd_off] = 0;
- virtaddr += PTRTREESIZE;
- size -= PTRTREESIZE;
- continue;
- } else if (pmd_type == 0)
- continue;
- }
-
- if (pmd_bad(*pmd_dir)) {
- printk("iounmap: bad pmd (%08lx)\n", pmd_val(*pmd_dir));
- pmd_clear(pmd_dir);
- return;
- }
- pte_dir = pte_offset_kernel(pmd_dir, virtaddr);
-
- pte_val(*pte_dir) = 0;
- virtaddr += PAGE_SIZE;
- size -= PAGE_SIZE;
- }
-
- flush_tlb_all();
-}
-
-/*
- * Set new cache mode for some kernel address space.
- * The caller must push data for that range itself, if such data may already
- * be in the cache.
- */
-void kernel_set_cachemode(void *addr, unsigned long size, int cmode)
-{
- unsigned long virtaddr = (unsigned long)addr;
- pgd_t *pgd_dir;
- pmd_t *pmd_dir;
- pte_t *pte_dir;
-
- if (CPU_IS_040_OR_060) {
- switch (cmode) {
- case IOMAP_FULL_CACHING:
- cmode = _PAGE_CACHE040;
- break;
- case IOMAP_NOCACHE_SER:
- default:
- cmode = _PAGE_NOCACHE_S;
- break;
- case IOMAP_NOCACHE_NONSER:
- cmode = _PAGE_NOCACHE;
- break;
- case IOMAP_WRITETHROUGH:
- cmode = _PAGE_CACHE040W;
- break;
- }
- } else {
- switch (cmode) {
- case IOMAP_NOCACHE_SER:
- case IOMAP_NOCACHE_NONSER:
- default:
- cmode = _PAGE_NOCACHE030;
- break;
- case IOMAP_FULL_CACHING:
- case IOMAP_WRITETHROUGH:
- cmode = 0;
- }
- }
-
- while ((long)size > 0) {
- pgd_dir = pgd_offset_k(virtaddr);
- if (pgd_bad(*pgd_dir)) {
- printk("iocachemode: bad pgd(%08lx)\n", pgd_val(*pgd_dir));
- pgd_clear(pgd_dir);
- return;
- }
- pmd_dir = pmd_offset(pgd_dir, virtaddr);
-
- if (CPU_IS_020_OR_030) {
- int pmd_off = (virtaddr/PTRTREESIZE) & 15;
-
- if ((pmd_dir->pmd[pmd_off] & _DESCTYPE_MASK) == _PAGE_PRESENT) {
- pmd_dir->pmd[pmd_off] = (pmd_dir->pmd[pmd_off] &
- _CACHEMASK040) | cmode;
- virtaddr += PTRTREESIZE;
- size -= PTRTREESIZE;
- continue;
- }
- }
-
- if (pmd_bad(*pmd_dir)) {
- printk("iocachemode: bad pmd (%08lx)\n", pmd_val(*pmd_dir));
- pmd_clear(pmd_dir);
- return;
- }
- pte_dir = pte_offset_kernel(pmd_dir, virtaddr);
-
- pte_val(*pte_dir) = (pte_val(*pte_dir) & _CACHEMASK040) | cmode;
- virtaddr += PAGE_SIZE;
- size -= PAGE_SIZE;
- }
-
- flush_tlb_all();
-}
-EXPORT_SYMBOL(kernel_set_cachemode);
projects / firefly-linux-kernel-4.4.55.git / blobdiff