arch/arm/include/asm/proc-armv/processor.h

   1 /*
   2  *  linux/include/asm-arm/proc-armv/processor.h
   3  *
   4  *  Copyright (C) 1996-1999 Russell King.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  *  Changelog:
  11  *   20-09-1996 RMK     Created
  12  *   26-09-1996 RMK     Added 'EXTRA_THREAD_STRUCT*'
  13  *   28-09-1996 RMK     Moved start_thread into the processor dependencies
  14  *   09-09-1998 PJB     Delete redundant `wp_works_ok'
  15  *   30-05-1999 PJB     Save sl across context switches
  16  *   31-07-1999 RMK     Added 'domain' stuff
  17  */
  18 #ifndef __ASM_PROC_PROCESSOR_H
  19 #define __ASM_PROC_PROCESSOR_H
  20
  21 #include <asm/proc/domain.h>
  22
  23 #define KERNEL_STACK_SIZE       PAGE_SIZE
  24
  25 struct context_save_struct {
  26         unsigned long cpsr;
  27         unsigned long r4;
  28         unsigned long r5;
  29         unsigned long r6;
  30         unsigned long r7;
  31         unsigned long r8;
  32         unsigned long r9;
  33         unsigned long sl;
  34         unsigned long fp;
  35         unsigned long pc;
  36 };
  37
  38 #define INIT_CSS (struct context_save_struct){ SVC_MODE, 0, 0, 0, 0, 0, 0, 0, 0, 0 }
  39
  40 #define EXTRA_THREAD_STRUCT                                             \
  41         unsigned int    domain;
  42
  43 #define EXTRA_THREAD_STRUCT_INIT                                        \
  44         domain:   domain_val(DOMAIN_USER, DOMAIN_CLIENT) |              \
  45                   domain_val(DOMAIN_KERNEL, DOMAIN_MANAGER) |           \
  46                   domain_val(DOMAIN_IO, DOMAIN_CLIENT)
  47
  48 #define start_thread(regs,pc,sp)                                        \
  49 ({                                                                      \
  50         unsigned long *stack = (unsigned long *)sp;                     \
  51         set_fs(USER_DS);                                                \
  52         memzero(regs->uregs, sizeof(regs->uregs));                      \
  53         if (current->personality & ADDR_LIMIT_32BIT)                    \
  54                 regs->ARM_cpsr = USR_MODE;                              \
  55         else                                                            \
  56                 regs->ARM_cpsr = USR26_MODE;                            \
  57         regs->ARM_pc = pc;              /* pc */                        \
  58         regs->ARM_sp = sp;              /* sp */                        \
  59         regs->ARM_r2 = stack[2];        /* r2 (envp) */                 \
  60         regs->ARM_r1 = stack[1];        /* r1 (argv) */                 \
  61         regs->ARM_r0 = stack[0];        /* r0 (argc) */                 \
  62 })
  63
  64 #define KSTK_EIP(tsk)   (((unsigned long *)(4096+(unsigned long)(tsk)))[1019])
  65 #define KSTK_ESP(tsk)   (((unsigned long *)(4096+(unsigned long)(tsk)))[1017])
  66
  67 /* Allocation and freeing of basic task resources. */
  68 /*
  69  * NOTE! The task struct and the stack go together
  70  */
  71 #define ll_alloc_task_struct() ((struct task_struct *) __get_free_pages(GFP_KERNEL,1))
  72 #define ll_free_task_struct(p) free_pages((unsigned long)(p),1)
  73
  74 #endif