i386/linux-2.3.21/include/asm-arm/proc-armo/processor.h

   1 /*
   2  * linux/include/asm-arm/proc-armo/processor.h
   3  *
   4  * Copyright (c) 1996 Russell King.
   5  *
   6  * Changelog:
   7  *  27-06-1996  RMK     Created
   8  *  10-10-1996  RMK     Brought up to date with SA110
   9  *  26-09-1996  RMK     Added 'EXTRA_THREAD_STRUCT*'
  10  *  28-09-1996  RMK     Moved start_thread into the processor dependencies
  11  *  11-01-1998  RMK     Added new uaccess_t
  12  *  09-09-1998  PJB     Delete redundant `wp_works_ok'
  13  *  30-05-1999  PJB     Save sl across context switches
  14  */
  15 #ifndef __ASM_PROC_PROCESSOR_H
  16 #define __ASM_PROC_PROCESSOR_H
  17
  18 #include <asm/assembler.h>
  19 #include <linux/string.h>
  20
  21 #define KERNEL_STACK_SIZE 4096
  22
  23 struct context_save_struct {
  24         unsigned long r4;
  25         unsigned long r5;
  26         unsigned long r6;
  27         unsigned long r7;
  28         unsigned long r8;
  29         unsigned long r9;
  30         unsigned long sl;
  31         unsigned long fp;
  32         unsigned long pc;
  33 };
  34
  35 #define INIT_CSS (struct context_save_struct){ 0, 0, 0, 0, 0, 0, 0, 0, SVC26_MODE }
  36
  37 typedef struct {
  38         void (*put_byte)(void);                 /* Special calling convention */
  39         void (*get_byte)(void);                 /* Special calling convention */
  40         void (*put_half)(void);                 /* Special calling convention */
  41         void (*get_half)(void);                 /* Special calling convention */
  42         void (*put_word)(void);                 /* Special calling convention */
  43         void (*get_word)(void);                 /* Special calling convention */
  44         unsigned long (*copy_from_user)(void *to, const void *from, unsigned long sz);
  45         unsigned long (*copy_to_user)(void *to, const void *from, unsigned long sz);
  46         unsigned long (*clear_user)(void *addr, unsigned long sz);
  47         unsigned long (*strncpy_from_user)(char *to, const char *from, unsigned long sz);
  48         unsigned long (*strlen_user)(const char *s);
  49 } uaccess_t;
  50
  51 extern uaccess_t uaccess_user, uaccess_kernel;
  52
  53 #define EXTRA_THREAD_STRUCT                                                     \
  54         uaccess_t       *uaccess;               /* User access functions*/      \
  55         unsigned long   memcmap[256];
  56
  57 #define EXTRA_THREAD_STRUCT_INIT                \
  58         ,&uaccess_kernel,                       \
  59         { 0, }
  60
  61 #define SWAPPER_PG_DIR ((unsigned long)swapper_pg_dir)
  62
  63 #define start_thread(regs,pc,sp)                                        \
  64 ({                                                                      \
  65         unsigned long *stack = (unsigned long *)sp;                     \
  66         set_fs(USER_DS);                                                \
  67         memzero(regs->uregs, sizeof (regs->uregs));                     \
  68         regs->ARM_pc = pc;              /* pc */                        \
  69         regs->ARM_sp = sp;              /* sp */                        \
  70         regs->ARM_r2 = stack[2];        /* r2 (envp) */                 \
  71         regs->ARM_r1 = stack[1];        /* r1 (argv) */                 \
  72         regs->ARM_r0 = stack[0];        /* r0 (argc) */                 \
  73 })
  74
  75 /* Allocation and freeing of basic task resources. */
  76 /*
  77  * NOTE! The task struct and the stack go together
  78  */
  79 extern unsigned long get_page_8k(int priority);
  80 extern void free_page_8k(unsigned long page);
  81
  82 #define THREAD_SIZE     (8192)
  83
  84 #define ll_alloc_task_struct()  ((struct task_struct *)get_page_8k(GFP_KERNEL))
  85 #define ll_free_task_struct(p)  free_page_8k((unsigned long)(p))
  86
  87 #endif