UBOOT 源码

				/*				 *  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 								#define KERNEL_STACK_SIZE	PAGE_SIZE								struct context_save_struct {					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;				};								#define INIT_CSS (struct context_save_struct){ SVC_MODE, 0, 0, 0, 0, 0, 0, 0, 0, 0 }								#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