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author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-08-03 10:39:02 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-08-03 10:39:02 -0700 |
commit | 7e31aa11fc672bbe0dd0da59513c9efe3809ced7 (patch) | |
tree | 0aafe6a0045230950ce6b26579a053da12614a49 /arch/arm/include/asm/processor.h | |
parent | 071f4924844c435a3ae0cdbab7d7df2f1da85713 (diff) | |
parent | 9cb7117fa4858468014f76bd996076985111e955 (diff) | |
download | op-kernel-dev-7e31aa11fc672bbe0dd0da59513c9efe3809ced7.zip op-kernel-dev-7e31aa11fc672bbe0dd0da59513c9efe3809ced7.tar.gz |
Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm:
[ARM] 5182/1: pxa: Fix pcm990 compilation
[ARM] Fix explicit asm(-arm)?/arch-foo references
[ARM] move include/asm-arm to arch/arm/include/asm
[ARM] Remove explicit dependency for misc.o from compressed/Makefile
[ARM] initrd: claim initrd memory exclusively
[ARM] pxa: add support for L2 outer cache on XScale3 (attempt 2)
[ARM] 5180/1: at91: Fix at91_nand -> atmel_nand rename fallout
[ARM] add Sascha Hauer as Freescale i.MX Maintainer
[ARM] i.MX: add missing clock functions exports
[ARM] i.MX: remove set_imx_fb_info() export
[ARM] mx1ads: make mmc platform data available for modules
[ARM] mx2: add missing Kconfig dependency
Diffstat (limited to 'arch/arm/include/asm/processor.h')
-rw-r--r-- | arch/arm/include/asm/processor.h | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/arch/arm/include/asm/processor.h b/arch/arm/include/asm/processor.h new file mode 100644 index 0000000..b01d5e7 --- /dev/null +++ b/arch/arm/include/asm/processor.h @@ -0,0 +1,131 @@ +/* + * arch/arm/include/asm/processor.h + * + * Copyright (C) 1995-1999 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_ARM_PROCESSOR_H +#define __ASM_ARM_PROCESSOR_H + +/* + * Default implementation of macro that returns current + * instruction pointer ("program counter"). + */ +#define current_text_addr() ({ __label__ _l; _l: &&_l;}) + +#ifdef __KERNEL__ + +#include <asm/ptrace.h> +#include <asm/types.h> + +#ifdef __KERNEL__ +#define STACK_TOP ((current->personality == PER_LINUX_32BIT) ? \ + TASK_SIZE : TASK_SIZE_26) +#define STACK_TOP_MAX TASK_SIZE +#endif + +union debug_insn { + u32 arm; + u16 thumb; +}; + +struct debug_entry { + u32 address; + union debug_insn insn; +}; + +struct debug_info { + int nsaved; + struct debug_entry bp[2]; +}; + +struct thread_struct { + /* fault info */ + unsigned long address; + unsigned long trap_no; + unsigned long error_code; + /* debugging */ + struct debug_info debug; +}; + +#define INIT_THREAD { } + +#ifdef CONFIG_MMU +#define nommu_start_thread(regs) do { } while (0) +#else +#define nommu_start_thread(regs) regs->ARM_r10 = current->mm->start_data +#endif + +#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; \ + if (elf_hwcap & HWCAP_THUMB && pc & 1) \ + regs->ARM_cpsr |= PSR_T_BIT; \ + regs->ARM_pc = pc & ~1; /* 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) */ \ + nommu_start_thread(regs); \ +}) + +/* Forward declaration, a strange C thing */ +struct task_struct; + +/* Free all resources held by a thread. */ +extern void release_thread(struct task_struct *); + +/* Prepare to copy thread state - unlazy all lazy status */ +#define prepare_to_copy(tsk) do { } while (0) + +unsigned long get_wchan(struct task_struct *p); + +#define cpu_relax() barrier() + +/* + * Create a new kernel thread + */ +extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags); + +#define task_pt_regs(p) \ + ((struct pt_regs *)(THREAD_START_SP + task_stack_page(p)) - 1) + +#define KSTK_EIP(tsk) task_pt_regs(tsk)->ARM_pc +#define KSTK_ESP(tsk) task_pt_regs(tsk)->ARM_sp + +/* + * Prefetching support - only ARMv5. + */ +#if __LINUX_ARM_ARCH__ >= 5 + +#define ARCH_HAS_PREFETCH +static inline void prefetch(const void *ptr) +{ + __asm__ __volatile__( + "pld\t%0" + : + : "o" (*(char *)ptr) + : "cc"); +} + +#define ARCH_HAS_PREFETCHW +#define prefetchw(ptr) prefetch(ptr) + +#define ARCH_HAS_SPINLOCK_PREFETCH +#define spin_lock_prefetch(x) do { } while (0) + +#endif + +#endif + +#endif /* __ASM_ARM_PROCESSOR_H */ |