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_32_H
9 #define __ASM_SH_PROCESSOR_32_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
32 unsigned long loops_per_jiffy;
33 unsigned long asid_cache;
35 struct cache_info icache; /* Primary I-cache */
36 struct cache_info dcache; /* Primary D-cache */
37 struct cache_info scache; /* Secondary cache */
40 } __attribute__ ((aligned(L1_CACHE_BYTES)));
42 extern struct sh_cpuinfo cpu_data[];
43 #define boot_cpu_data cpu_data[0]
44 #define current_cpu_data cpu_data[smp_processor_id()]
45 #define raw_current_cpu_data cpu_data[raw_smp_processor_id()]
48 * User space process size: 2GB.
50 * Since SH7709 and SH7750 have "area 7", we can't use 0x7c000000--0x7fffffff
52 #define TASK_SIZE 0x7c000000UL
54 /* This decides where the kernel will search for a free chunk of vm
55 * space during mmap's.
57 #define TASK_UNMAPPED_BASE (TASK_SIZE / 3)
63 * When it's set, it means the processor doesn't have right to use FPU,
64 * and it results exception when the floating operation is executed.
67 * Interrupt level mask
69 #define SR_FD 0x00008000
70 #define SR_DSP 0x00001000
71 #define SR_IMASK 0x000000f0
74 * FPU structure and data
77 struct sh_fpu_hard_struct {
78 unsigned long fp_regs[16];
79 unsigned long xfp_regs[16];
83 long status; /* software status information */
86 /* Dummy fpu emulator */
87 struct sh_fpu_soft_struct {
88 unsigned long fp_regs[16];
89 unsigned long xfp_regs[16];
93 unsigned char lookahead;
94 unsigned long entry_pc;
98 struct sh_fpu_hard_struct hard;
99 struct sh_fpu_soft_struct soft;
102 struct thread_struct {
103 /* Saved registers when thread is descheduled */
107 /* Hardware debugging registers */
108 unsigned long ubc_pc;
110 /* floating point info */
111 union sh_fpu_union fpu;
118 /* Count of active tasks with UBC settings */
119 extern int ubc_usercnt;
121 #define INIT_THREAD { \
122 .sp = sizeof(init_stack) + (long) &init_stack, \
126 * Do necessary setup to start up a newly executed thread.
128 #define start_thread(regs, new_pc, new_sp) \
131 regs->sr = SR_FD; /* User mode. */ \
133 regs->regs[15] = new_sp
135 /* Forward declaration, a strange C thing */
139 /* Free all resources held by a thread. */
140 extern void release_thread(struct task_struct *);
142 /* Prepare to copy thread state - unlazy all lazy status */
143 #define prepare_to_copy(tsk) do { } while (0)
146 * create a kernel thread without removing it from tasklists
148 extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
150 /* Copy and release all segment info associated with a VM */
151 #define copy_segments(p, mm) do { } while(0)
152 #define release_segments(mm) do { } while(0)
155 * FPU lazy state save handling.
158 static __inline__ void disable_fpu(void)
160 unsigned long __dummy;
162 /* Set FD flag in SR */
163 __asm__ __volatile__("stc sr, %0\n\t"
170 static __inline__ void enable_fpu(void)
172 unsigned long __dummy;
174 /* Clear out FD flag in SR */
175 __asm__ __volatile__("stc sr, %0\n\t"
182 static __inline__ void release_fpu(struct pt_regs *regs)
187 static __inline__ void grab_fpu(struct pt_regs *regs)
192 extern void save_fpu(struct task_struct *__tsk, struct pt_regs *regs);
194 #define unlazy_fpu(tsk, regs) do { \
195 if (test_tsk_thread_flag(tsk, TIF_USEDFPU)) { \
196 save_fpu(tsk, regs); \
200 #define clear_fpu(tsk, regs) do { \
201 if (test_tsk_thread_flag(tsk, TIF_USEDFPU)) { \
202 clear_tsk_thread_flag(tsk, TIF_USEDFPU); \
207 /* Double presision, NANS as NANS, rounding to nearest, no exceptions */
208 #define FPSCR_INIT 0x00080000
210 #define FPSCR_CAUSE_MASK 0x0001f000 /* Cause bits */
211 #define FPSCR_FLAG_MASK 0x0000007c /* Flag bits */
214 * Return saved PC of a blocked thread.
216 #define thread_saved_pc(tsk) (tsk->thread.pc)
218 void show_trace(struct task_struct *tsk, unsigned long *sp,
219 struct pt_regs *regs);
220 extern unsigned long get_wchan(struct task_struct *p);
222 #define KSTK_EIP(tsk) (task_pt_regs(tsk)->pc)
223 #define KSTK_ESP(tsk) (task_pt_regs(tsk)->regs[15])
225 #define cpu_sleep() __asm__ __volatile__ ("sleep" : : : "memory")
226 #define cpu_relax() barrier()
228 #if defined(CONFIG_CPU_SH2A) || defined(CONFIG_CPU_SH3) || \
229 defined(CONFIG_CPU_SH4)
230 #define PREFETCH_STRIDE L1_CACHE_BYTES
231 #define ARCH_HAS_PREFETCH
232 #define ARCH_HAS_PREFETCHW
233 static inline void prefetch(void *x)
235 __asm__ __volatile__ ("pref @%0\n\t" : : "r" (x) : "memory");
238 #define prefetchw(x) prefetch(x)
241 #ifdef CONFIG_VSYSCALL
242 extern int vsyscall_init(void);
244 #define vsyscall_init() do { } while (0)
247 #endif /* __KERNEL__ */
248 #endif /* __ASM_SH_PROCESSOR_32_H */