2 * include/asm-sh/processor.h
4 * Copyright (C) 1999, 2000 Niibe Yutaka
5 * Copyright (C) 2002, 2003 Paul Mundt
8 #ifndef __ASM_SH_PROCESSOR_H
9 #define __ASM_SH_PROCESSOR_H
12 #include <linux/compiler.h>
14 #include <asm/types.h>
15 #include <asm/cache.h>
16 #include <asm/ptrace.h>
17 #include <asm/cpu-features.h>
20 * Default implementation of macro that returns current
21 * instruction pointer ("program counter").
23 #define current_text_addr() ({ void *pc; __asm__("mova 1f, %0\n1:":"=z" (pc)); pc; })
25 /* Core Processor Version Register */
26 #define CCN_PVR 0xff000030
27 #define CCN_CVR 0xff000040
28 #define CCN_PRR 0xff000044
31 * CPU type and hardware bug flags. Kept separately for each CPU.
33 * Each one of these also needs a CONFIG_CPU_SUBTYPE_xxx entry
34 * in arch/sh/mm/Kconfig, as well as an entry in arch/sh/kernel/setup.c
35 * for parsing the subtype in get_cpu_subtype().
39 CPU_SH7604, CPU_SH7619,
45 CPU_SH7705, CPU_SH7706, CPU_SH7707,
46 CPU_SH7708, CPU_SH7708S, CPU_SH7708R,
47 CPU_SH7709, CPU_SH7709A, CPU_SH7710,
48 CPU_SH7729, CPU_SH7300,
51 CPU_SH7750, CPU_SH7750S, CPU_SH7750R, CPU_SH7751, CPU_SH7751R,
52 CPU_SH7760, CPU_ST40RA, CPU_ST40GX1, CPU_SH4_202, CPU_SH4_501,
55 CPU_SH73180, CPU_SH7343, CPU_SH7770, CPU_SH7780, CPU_SH7781,
64 unsigned long loops_per_jiffy;
66 struct cache_info icache; /* Primary I-cache */
67 struct cache_info dcache; /* Primary D-cache */
68 struct cache_info scache; /* Secondary cache */
71 } __attribute__ ((aligned(SMP_CACHE_BYTES)));
73 extern struct sh_cpuinfo boot_cpu_data;
76 extern struct sh_cpuinfo cpu_data[];
77 #define current_cpu_data cpu_data[smp_processor_id()]
79 #define cpu_data (&boot_cpu_data)
80 #define current_cpu_data boot_cpu_data
84 * User space process size: 2GB.
86 * Since SH7709 and SH7750 have "area 7", we can't use 0x7c000000--0x7fffffff
88 #define TASK_SIZE 0x7c000000UL
90 /* This decides where the kernel will search for a free chunk of vm
91 * space during mmap's.
93 #define TASK_UNMAPPED_BASE (TASK_SIZE / 3)
99 * When it's set, it means the processor doesn't have right to use FPU,
100 * and it results exception when the floating operation is executed.
103 * Interrupt level mask
105 #define SR_FD 0x00008000
106 #define SR_DSP 0x00001000
107 #define SR_IMASK 0x000000f0
110 * FPU structure and data
113 struct sh_fpu_hard_struct {
114 unsigned long fp_regs[16];
115 unsigned long xfp_regs[16];
119 long status; /* software status information */
122 /* Dummy fpu emulator */
123 struct sh_fpu_soft_struct {
124 unsigned long fp_regs[16];
125 unsigned long xfp_regs[16];
129 unsigned char lookahead;
130 unsigned long entry_pc;
134 struct sh_fpu_hard_struct hard;
135 struct sh_fpu_soft_struct soft;
138 struct thread_struct {
142 unsigned long trap_no, error_code;
143 unsigned long address;
144 /* Hardware debugging registers may come here */
145 unsigned long ubc_pc;
147 /* floating point info */
148 union sh_fpu_union fpu;
155 /* Count of active tasks with UBC settings */
156 extern int ubc_usercnt;
158 #define INIT_THREAD { \
159 sizeof(init_stack) + (long) &init_stack, /* sp */ \
164 {{{0,}},} /* fpu state */ \
168 * Do necessary setup to start up a newly executed thread.
170 #define start_thread(regs, new_pc, new_sp) \
173 regs->sr = SR_FD; /* User mode. */ \
175 regs->regs[15] = new_sp
177 /* Forward declaration, a strange C thing */
181 /* Free all resources held by a thread. */
182 extern void release_thread(struct task_struct *);
184 /* Prepare to copy thread state - unlazy all lazy status */
185 #define prepare_to_copy(tsk) do { } while (0)
188 * create a kernel thread without removing it from tasklists
190 extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
192 /* Copy and release all segment info associated with a VM */
193 #define copy_segments(p, mm) do { } while(0)
194 #define release_segments(mm) do { } while(0)
197 * FPU lazy state save handling.
200 static __inline__ void disable_fpu(void)
202 unsigned long __dummy;
204 /* Set FD flag in SR */
205 __asm__ __volatile__("stc sr, %0\n\t"
212 static __inline__ void enable_fpu(void)
214 unsigned long __dummy;
216 /* Clear out FD flag in SR */
217 __asm__ __volatile__("stc sr, %0\n\t"
224 static __inline__ void release_fpu(struct pt_regs *regs)
229 static __inline__ void grab_fpu(struct pt_regs *regs)
234 #ifdef CONFIG_CPU_SH4
235 extern void save_fpu(struct task_struct *__tsk, struct pt_regs *regs);
237 #define save_fpu(tsk) do { } while (0)
240 #define unlazy_fpu(tsk, regs) do { \
241 if (test_tsk_thread_flag(tsk, TIF_USEDFPU)) { \
242 save_fpu(tsk, regs); \
246 #define clear_fpu(tsk, regs) do { \
247 if (test_tsk_thread_flag(tsk, TIF_USEDFPU)) { \
248 clear_tsk_thread_flag(tsk, TIF_USEDFPU); \
253 /* Double presision, NANS as NANS, rounding to nearest, no exceptions */
254 #define FPSCR_INIT 0x00080000
256 #define FPSCR_CAUSE_MASK 0x0001f000 /* Cause bits */
257 #define FPSCR_FLAG_MASK 0x0000007c /* Flag bits */
260 * Return saved PC of a blocked thread.
262 #define thread_saved_pc(tsk) (tsk->thread.pc)
264 void show_trace(struct task_struct *tsk, unsigned long *sp,
265 struct pt_regs *regs);
266 extern unsigned long get_wchan(struct task_struct *p);
268 #define KSTK_EIP(tsk) ((tsk)->thread.pc)
269 #define KSTK_ESP(tsk) ((tsk)->thread.sp)
271 #define cpu_sleep() __asm__ __volatile__ ("sleep" : : : "memory")
272 #define cpu_relax() barrier()
274 #if defined(CONFIG_CPU_SH2A) || defined(CONFIG_CPU_SH3) || \
275 defined(CONFIG_CPU_SH4)
276 #define PREFETCH_STRIDE L1_CACHE_BYTES
277 #define ARCH_HAS_PREFETCH
278 #define ARCH_HAS_PREFETCHW
279 static inline void prefetch(void *x)
281 __asm__ __volatile__ ("pref @%0\n\t" : : "r" (x) : "memory");
284 #define prefetchw(x) prefetch(x)
287 #ifdef CONFIG_VSYSCALL
288 extern int vsyscall_init(void);
290 #define vsyscall_init() do { } while (0)
293 #endif /* __KERNEL__ */
294 #endif /* __ASM_SH_PROCESSOR_H */