LXR uboot/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-armv/domain.h>
  22
  23#define KERNEL_STACK_SIZE       PAGE_SIZE
  24
  25struct 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
  75