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 75