processor.h
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上传日期:2013-02-24
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- /*
- * linux/include/asm-arm/proc-armv/processor.h
- *
- * Copyright (C) 1996-1999 Russell King.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Changelog:
- * 20-09-1996 RMK Created
- * 26-09-1996 RMK Added 'EXTRA_THREAD_STRUCT*'
- * 28-09-1996 RMK Moved start_thread into the processor dependencies
- * 09-09-1998 PJB Delete redundant `wp_works_ok'
- * 30-05-1999 PJB Save sl across context switches
- * 31-07-1999 RMK Added 'domain' stuff
- */
- #ifndef __ASM_PROC_PROCESSOR_H
- #define __ASM_PROC_PROCESSOR_H
- #include <asm/proc/domain.h>
- #define KERNEL_STACK_SIZE PAGE_SIZE
- struct context_save_struct {
- #ifdef CONFIG_CPU_XSCALE
- long long acc0;
- #endif
- unsigned long cpsr;
- unsigned long r4;
- unsigned long r5;
- unsigned long r6;
- unsigned long r7;
- unsigned long r8;
- unsigned long r9;
- unsigned long sl;
- unsigned long fp;
- unsigned long pc;
- };
- #ifdef CONFIG_CPU_XSCALE
- #define INIT_CSS (struct context_save_struct){ 0, SVC_MODE, 0, 0, 0, 0, 0, 0, 0, 0, 0 }
- #else
- #define INIT_CSS (struct context_save_struct){ SVC_MODE, 0, 0, 0, 0, 0, 0, 0, 0, 0 }
- #endif
- #define EXTRA_THREAD_STRUCT
- unsigned int domain;
- #define EXTRA_THREAD_STRUCT_INIT
- domain: domain_val(DOMAIN_USER, DOMAIN_CLIENT) |
- domain_val(DOMAIN_KERNEL, DOMAIN_MANAGER) |
- domain_val(DOMAIN_IO, DOMAIN_CLIENT)
- #define start_thread(regs,pc,sp)
- ({
- unsigned long *stack = (unsigned long *)sp;
- set_fs(USER_DS);
- memzero(regs->uregs, sizeof(regs->uregs));
- if (current->personality & ADDR_LIMIT_32BIT)
- regs->ARM_cpsr = USR_MODE;
- else
- regs->ARM_cpsr = USR26_MODE;
- 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) */
- })
- #define KSTK_EIP(tsk) (((unsigned long *)(4096+(unsigned long)(tsk)))[1019])
- #define KSTK_ESP(tsk) (((unsigned long *)(4096+(unsigned long)(tsk)))[1017])
- /* Allocation and freeing of basic task resources. */
- /*
- * NOTE! The task struct and the stack go together
- */
- #define ll_alloc_task_struct() ((struct task_struct *) __get_free_pages(GFP_KERNEL,1))
- #define ll_free_task_struct(p) free_pages((unsigned long)(p),1)
- #endif