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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 | /* * include/asm-sh/processor.h * * Copyright (C) 1999 Niibe Yutaka */ #ifndef __ASM_SH_PROCESSOR_H #define __ASM_SH_PROCESSOR_H #include <asm/page.h> #include <asm/types.h> #include <linux/threads.h> /* * Default implementation of macro that returns current * instruction pointer ("program counter"). */ #define current_text_addr() ({ void *pc; __asm__("mova 1f,%0\n1:":"=z" (pc)); pc; }) /* * CPU type and hardware bug flags. Kept separately for each CPU. */ enum cpu_type { CPU_SH7708, /* Represents 7708, 7708S, 7708R, 7709 */ CPU_SH7729, /* Represents 7709A, 7729 */ CPU_SH7750, CPU_SH_NONE }; struct sh_cpuinfo { enum cpu_type type; unsigned long loops_per_sec; char hard_math; unsigned long *pgd_quick; unsigned long *pte_quick; unsigned long pgtable_cache_sz; }; extern struct sh_cpuinfo boot_cpu_data; #define cpu_data (&boot_cpu_data) #define current_cpu_data boot_cpu_data /* * User space process size: 2GB. */ #define TASK_SIZE 0x80000000 /* This decides where the kernel will search for a free chunk of vm * space during mmap's. */ #define TASK_UNMAPPED_BASE (TASK_SIZE / 3) #define NUM_FPU_REGS 16 struct sh_fpu_hard_struct { unsigned long fp_regs[NUM_FPU_REGS]; unsigned long xf_regs[NUM_FPU_REGS]; unsigned long fpscr; unsigned long fpul; long status; /* software status information */ }; /* Dummy fpu emulator */ struct sh_fpu_soft_struct { unsigned long fp_regs[NUM_FPU_REGS]; unsigned long xf_regs[NUM_FPU_REGS]; unsigned long fpscr; unsigned long fpul; unsigned char lookahead; unsigned long entry_pc; }; union sh_fpu_union { struct sh_fpu_hard_struct hard; struct sh_fpu_soft_struct soft; }; struct thread_struct { unsigned long sp; unsigned long pc; unsigned long trap_no, error_code; unsigned long address; /* Hardware debugging registers may come here */ /* floating point info */ union sh_fpu_union fpu; }; #define INIT_MMAP \ { &init_mm, 0x80000000, 0xa0000000, NULL, PAGE_SHARED, VM_READ | VM_WRITE | VM_EXEC, 1, NULL, NULL } #define INIT_THREAD { \ sizeof(init_stack) + (long) &init_stack, /* sp */ \ 0, /* pc */ \ 0, 0, \ 0, \ {{{0,}},} \ } /* * Do necessary setup to start up a newly executed thread. */ #define start_thread(regs, new_pc, new_sp) \ set_fs(USER_DS); \ regs->pr = 0; \ regs->sr = 0; /* User mode. */ \ regs->pc = new_pc; \ regs->sp = new_sp /* Forward declaration, a strange C thing */ struct task_struct; struct mm_struct; /* Free all resources held by a thread. */ extern void release_thread(struct task_struct *); /* * create a kernel thread without removing it from tasklists */ extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags); /* * Bus types */ #define EISA_bus 0 #define EISA_bus__is_a_macro /* for versions in ksyms.c */ #define MCA_bus 0 #define MCA_bus__is_a_macro /* for versions in ksyms.c */ /* Copy and release all segment info associated with a VM */ #define copy_segments(p, mm) do { } while(0) #define release_segments(mm) do { } while(0) #define forget_segments() do { } while (0) /* * FPU lazy state save handling.. */ #define SR_FD 0x00008000 extern __inline__ void release_fpu(void) { unsigned long __dummy; /* Set FD flag in SR */ __asm__ __volatile__ ("stc sr,%0\n\t" "or %1,%0\n\t" "ldc %0,sr" : "=&r" (__dummy) : "r" (SR_FD)); } extern __inline__ void grab_fpu(void) { unsigned long __dummy; /* Clear out FD flag in SR */ __asm__ __volatile__ ("stc sr,%0\n\t" "and %1,%0\n\t" "ldc %0,sr" : "=&r" (__dummy) : "r" (~SR_FD)); } extern void save_fpu(struct task_struct *__tsk); #define unlazy_fpu(tsk) do { \ if (tsk->flags & PF_USEDFPU) \ save_fpu(tsk); \ } while (0) #define clear_fpu(tsk) do { \ if (tsk->flags & PF_USEDFPU) { \ tsk->flags &= ~PF_USEDFPU; \ release_fpu(); \ } \ } while (0) /* * Return saved PC of a blocked thread. */ extern __inline__ unsigned long thread_saved_pc(struct thread_struct *t) { return t->pc; } #define THREAD_SIZE (2*PAGE_SIZE) extern struct task_struct * alloc_task_struct(void); extern void free_task_struct(struct task_struct *); #define init_task (init_task_union.task) #define init_stack (init_task_union.stack) #endif /* __ASM_SH_PROCESSOR_H */ |