diff options
Diffstat (limited to 'include/asm-arm/proc-armv')
| -rw-r--r-- | include/asm-arm/proc-armv/domain.h | 50 | ||||
| -rw-r--r-- | include/asm-arm/proc-armv/processor.h | 74 | ||||
| -rw-r--r-- | include/asm-arm/proc-armv/ptrace.h | 2 | ||||
| -rw-r--r-- | include/asm-arm/proc-armv/system.h | 199 |
4 files changed, 323 insertions, 2 deletions
diff --git a/include/asm-arm/proc-armv/domain.h b/include/asm-arm/proc-armv/domain.h new file mode 100644 index 0000000..aadc831 --- /dev/null +++ b/include/asm-arm/proc-armv/domain.h @@ -0,0 +1,50 @@ +/* + * linux/include/asm-arm/proc-armv/domain.h + * + * Copyright (C) 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. + */ +#ifndef __ASM_PROC_DOMAIN_H +#define __ASM_PROC_DOMAIN_H + +/* + * Domain numbers + * + * DOMAIN_IO - domain 2 includes all IO only + * DOMAIN_KERNEL - domain 1 includes all kernel memory only + * DOMAIN_USER - domain 0 includes all user memory only + */ +#define DOMAIN_USER 0 +#define DOMAIN_KERNEL 1 +#define DOMAIN_TABLE 1 +#define DOMAIN_IO 2 + +/* + * Domain types + */ +#define DOMAIN_NOACCESS 0 +#define DOMAIN_CLIENT 1 +#define DOMAIN_MANAGER 3 + +#define domain_val(dom,type) ((type) << 2*(dom)) + +#define set_domain(x) \ + do { \ + __asm__ __volatile__( \ + "mcr p15, 0, %0, c3, c0 @ set domain" \ + : : "r" (x)); \ + } while (0) + +#define modify_domain(dom,type) \ + do { \ + unsigned int domain = current->thread.domain; \ + domain &= ~domain_val(dom, DOMAIN_MANAGER); \ + domain |= domain_val(dom, type); \ + current->thread.domain = domain; \ + set_domain(current->thread.domain); \ + } while (0) + +#endif diff --git a/include/asm-arm/proc-armv/processor.h b/include/asm-arm/proc-armv/processor.h new file mode 100644 index 0000000..5bfab7f --- /dev/null +++ b/include/asm-arm/proc-armv/processor.h @@ -0,0 +1,74 @@ +/* + * 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 { + 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 diff --git a/include/asm-arm/proc-armv/ptrace.h b/include/asm-arm/proc-armv/ptrace.h index b32edfc..51708b9 100644 --- a/include/asm-arm/proc-armv/ptrace.h +++ b/include/asm-arm/proc-armv/ptrace.h @@ -61,8 +61,6 @@ struct pt_regs { #define ARM_r0 uregs[0] #define ARM_ORIG_r0 uregs[17] -#define instruction_pointer(regs) ((regs)->ARM_ip) - #ifdef __KERNEL__ #define user_mode(regs) \ diff --git a/include/asm-arm/proc-armv/system.h b/include/asm-arm/proc-armv/system.h new file mode 100644 index 0000000..479f553 --- /dev/null +++ b/include/asm-arm/proc-armv/system.h @@ -0,0 +1,199 @@ +/* + * linux/include/asm-arm/proc-armv/system.h + * + * Copyright (C) 1996 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. + */ +#ifndef __ASM_PROC_SYSTEM_H +#define __ASM_PROC_SYSTEM_H + +#include <linux/config.h> + +#define set_cr(x) \ + __asm__ __volatile__( \ + "mcr p15, 0, %0, c1, c0 @ set CR" \ + : : "r" (x)) + +#define CR_M (1 << 0) /* MMU enable */ +#define CR_A (1 << 1) /* Alignment abort enable */ +#define CR_C (1 << 2) /* Dcache enable */ +#define CR_W (1 << 3) /* Write buffer enable */ +#define CR_P (1 << 4) /* 32-bit exception handler */ +#define CR_D (1 << 5) /* 32-bit data address range */ +#define CR_L (1 << 6) /* Implementation defined */ +#define CD_B (1 << 7) /* Big endian */ +#define CR_S (1 << 8) /* System MMU protection */ +#define CD_R (1 << 9) /* ROM MMU protection */ +#define CR_F (1 << 10) /* Implementation defined */ +#define CR_Z (1 << 11) /* Implementation defined */ +#define CR_I (1 << 12) /* Icache enable */ +#define CR_V (1 << 13) /* Vectors relocated to 0xffff0000 */ +#define CR_RR (1 << 14) /* Round Robin cache replacement */ + +extern unsigned long cr_no_alignment; /* defined in entry-armv.S */ +extern unsigned long cr_alignment; /* defined in entry-armv.S */ + +#if __LINUX_ARM_ARCH__ >= 4 +#define vectors_base() ((cr_alignment & CR_V) ? 0xffff0000 : 0) +#else +#define vectors_base() (0) +#endif + +/* + * Save the current interrupt enable state & disable IRQs + */ +#define local_irq_save(x) \ + ({ \ + unsigned long temp; \ + __asm__ __volatile__( \ + "mrs %0, cpsr @ local_irq_save\n" \ +" orr %1, %0, #128\n" \ +" msr cpsr_c, %1" \ + : "=r" (x), "=r" (temp) \ + : \ + : "memory"); \ + }) + +/* + * Enable IRQs + */ +#define local_irq_enable() \ + ({ \ + unsigned long temp; \ + __asm__ __volatile__( \ + "mrs %0, cpsr @ local_irq_enable\n" \ +" bic %0, %0, #128\n" \ +" msr cpsr_c, %0" \ + : "=r" (temp) \ + : \ + : "memory"); \ + }) + +/* + * Disable IRQs + */ +#define local_irq_disable() \ + ({ \ + unsigned long temp; \ + __asm__ __volatile__( \ + "mrs %0, cpsr @ local_irq_disable\n" \ +" orr %0, %0, #128\n" \ +" msr cpsr_c, %0" \ + : "=r" (temp) \ + : \ + : "memory"); \ + }) + +/* + * Enable FIQs + */ +#define __stf() \ + ({ \ + unsigned long temp; \ + __asm__ __volatile__( \ + "mrs %0, cpsr @ stf\n" \ +" bic %0, %0, #64\n" \ +" msr cpsr_c, %0" \ + : "=r" (temp) \ + : \ + : "memory"); \ + }) + +/* + * Disable FIQs + */ +#define __clf() \ + ({ \ + unsigned long temp; \ + __asm__ __volatile__( \ + "mrs %0, cpsr @ clf\n" \ +" orr %0, %0, #64\n" \ +" msr cpsr_c, %0" \ + : "=r" (temp) \ + : \ + : "memory"); \ + }) + +/* + * Save the current interrupt enable state. + */ +#define local_save_flags(x) \ + ({ \ + __asm__ __volatile__( \ + "mrs %0, cpsr @ local_save_flags\n" \ + : "=r" (x) \ + : \ + : "memory"); \ + }) + +/* + * restore saved IRQ & FIQ state + */ +#define local_irq_restore(x) \ + __asm__ __volatile__( \ + "msr cpsr_c, %0 @ local_irq_restore\n" \ + : \ + : "r" (x) \ + : "memory") + +#if defined(CONFIG_CPU_SA1100) || defined(CONFIG_CPU_SA110) +/* + * On the StrongARM, "swp" is terminally broken since it bypasses the + * cache totally. This means that the cache becomes inconsistent, and, + * since we use normal loads/stores as well, this is really bad. + * Typically, this causes oopsen in filp_close, but could have other, + * more disasterous effects. There are two work-arounds: + * 1. Disable interrupts and emulate the atomic swap + * 2. Clean the cache, perform atomic swap, flush the cache + * + * We choose (1) since its the "easiest" to achieve here and is not + * dependent on the processor type. + */ +#define swp_is_buggy +#endif + +static inline unsigned long __xchg(unsigned long x, volatile void *ptr, int size) +{ + extern void __bad_xchg(volatile void *, int); + unsigned long ret; +#ifdef swp_is_buggy + unsigned long flags; +#endif + + switch (size) { +#ifdef swp_is_buggy + case 1: + local_irq_save(flags); + ret = *(volatile unsigned char *)ptr; + *(volatile unsigned char *)ptr = x; + local_irq_restore(flags); + break; + + case 4: + local_irq_save(flags); + ret = *(volatile unsigned long *)ptr; + *(volatile unsigned long *)ptr = x; + local_irq_restore(flags); + break; +#else + case 1: __asm__ __volatile__ ("swpb %0, %1, [%2]" + : "=&r" (ret) + : "r" (x), "r" (ptr) + : "memory"); + break; + case 4: __asm__ __volatile__ ("swp %0, %1, [%2]" + : "=&r" (ret) + : "r" (x), "r" (ptr) + : "memory"); + break; +#endif + default: __bad_xchg(ptr, size), ret = 0; + } + + return ret; +} + +#endif |