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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 | /* * linux/include/asm-arm/proc-armo/processor.h * * Copyright (c) 1996 Russell King. * * Changelog: * 27-06-1996 RMK Created * 10-10-1996 RMK Brought up to date with SA110 * 26-09-1996 RMK Added 'EXTRA_THREAD_STRUCT*' * 28-09-1996 RMK Moved start_thread into the processor dependencies * 11-01-1998 RMK Added new uaccess_t */ #ifndef __ASM_PROC_PROCESSOR_H #define __ASM_PROC_PROCESSOR_H #ifdef __KERNEL__ #include <asm/assembler.h> #include <linux/string.h> #define KERNEL_STACK_SIZE 4096 /* * on arm2,3 wp does not work */ #define wp_works_ok 0 #define wp_works_ok__is_a_macro /* for versions in ksyms.c */ struct context_save_struct { unsigned long r4; unsigned long r5; unsigned long r6; unsigned long r7; unsigned long r8; unsigned long r9; unsigned long fp; unsigned long pc; }; typedef struct { void (*put_byte)(void); /* Special calling convention */ void (*get_byte)(void); /* Special calling convention */ void (*put_half)(void); /* Special calling convention */ void (*get_half)(void); /* Special calling convention */ void (*put_word)(void); /* Special calling convention */ void (*get_word)(void); /* Special calling convention */ unsigned long (*copy_from_user)(void *to, const void *from, unsigned long sz); unsigned long (*copy_to_user)(void *to, const void *from, unsigned long sz); unsigned long (*clear_user)(void *addr, unsigned long sz); unsigned long (*strncpy_from_user)(char *to, const char *from, unsigned long sz); unsigned long (*strlen_user)(const char *s); } uaccess_t; extern uaccess_t uaccess_user, uaccess_kernel; #define EXTRA_THREAD_STRUCT \ uaccess_t *uaccess; /* User access functions*/ \ struct context_save_struct *save; \ unsigned long memmap; \ unsigned long memcmap[256]; #define EXTRA_THREAD_STRUCT_INIT \ &uaccess_kernel, \ 0, \ (unsigned long) swapper_pg_dir, \ { 0, } DECLARE_THREAD_STRUCT; /* * Return saved PC of a blocked thread. */ extern __inline__ unsigned long thread_saved_pc (struct thread_struct *t) { if (t->save) return t->save->pc & ~PCMASK; else return 0; } extern __inline__ unsigned long get_css_fp (struct thread_struct *t) { if (t->save) return t->save->fp; else return 0; } asmlinkage void ret_from_sys_call(void) __asm__("ret_from_sys_call"); extern __inline__ void copy_thread_css (struct context_save_struct *save) { save->r4 = save->r5 = save->r6 = save->r7 = save->r8 = save->r9 = save->fp = 0; save->pc = ((unsigned long)ret_from_sys_call) | SVC26_MODE; } #define start_thread(regs,pc,sp) \ ({ \ unsigned long *stack = (unsigned long *)sp; \ set_fs(USER_DS); \ memzero(regs->uregs, sizeof (regs->uregs)); \ regs->ARM_pc = pc; /* pc */ \ regs->ARM_sp = sp; /* sp */ \ regs->ARM_r2 = stack[2]; /* r2 (envp) */ \ regs->ARM_r1 = stack[1]; /* r1 (argv) */ \ regs->ARM_r0 = stack[0]; /* r0 (argc) */ \ flush_tlb_mm(current->mm); \ }) /* Allocation and freeing of basic task resources. */ /* * NOTE! The task struct and the stack go together */ #define alloc_task_struct() \ ((struct task_struct *) __get_free_pages(GFP_KERNEL,1)) #define free_task_struct(p) free_pages((unsigned long)(p),1) #endif #endif |