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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-arm/processor.h | |
download | lwn-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz lwn-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'include/asm-arm/processor.h')
-rw-r--r-- | include/asm-arm/processor.h | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/include/asm-arm/processor.h b/include/asm-arm/processor.h new file mode 100644 index 000000000000..4a9845997a75 --- /dev/null +++ b/include/asm-arm/processor.h @@ -0,0 +1,118 @@ +/* + * linux/include/asm-arm/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/procinfo.h> +#include <asm/types.h> + +#define KERNEL_STACK_SIZE PAGE_SIZE + +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 { } + +#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) */ \ +}) + +/* 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 KSTK_EIP(tsk) (((unsigned long *)(4096+(unsigned long)(tsk)->thread_info))[1019]) +#define KSTK_ESP(tsk) (((unsigned long *)(4096+(unsigned long)(tsk)->thread_info))[1017]) + +/* + * Prefetching support - only ARMv5. + */ +#if __LINUX_ARM_ARCH__ >= 5 + +#define ARCH_HAS_PREFETCH +#define prefetch(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 */ |