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Diffstat (limited to 'linux/arch/frv/include/asm/processor.h')
| -rw-r--r-- | linux/arch/frv/include/asm/processor.h | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/linux/arch/frv/include/asm/processor.h b/linux/arch/frv/include/asm/processor.h new file mode 100644 index 00000000..ae8d423e --- /dev/null +++ b/linux/arch/frv/include/asm/processor.h @@ -0,0 +1,127 @@ +/* processor.h: FRV processor definitions + * + * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#ifndef _ASM_PROCESSOR_H +#define _ASM_PROCESSOR_H + +#include <asm/mem-layout.h> + +#ifndef __ASSEMBLY__ +/* + * Default implementation of macro that returns current + * instruction pointer ("program counter"). + */ +#define current_text_addr() ({ __label__ _l; _l: &&_l;}) + +#include <linux/compiler.h> +#include <linux/linkage.h> +#include <asm/sections.h> +#include <asm/segment.h> +#include <asm/fpu.h> +#include <asm/registers.h> +#include <asm/ptrace.h> +#include <asm/current.h> +#include <asm/cache.h> + +/* Forward declaration, a strange C thing */ +struct task_struct; + +/* + * Bus types + */ +#define EISA_bus 0 + +struct thread_struct { + struct pt_regs *frame; /* [GR28] exception frame ptr for this thread */ + struct task_struct *curr; /* [GR29] current pointer for this thread */ + unsigned long sp; /* [GR1 ] kernel stack pointer */ + unsigned long fp; /* [GR2 ] kernel frame pointer */ + unsigned long lr; /* link register */ + unsigned long pc; /* program counter */ + unsigned long gr[12]; /* [GR16-GR27] */ + unsigned long sched_lr; /* LR from schedule() */ + + union { + struct pt_regs *frame0; /* top (user) stack frame */ + struct user_context *user; /* userspace context */ + }; +} __attribute__((aligned(8))); + +extern struct pt_regs *__kernel_frame0_ptr; +extern struct task_struct *__kernel_current_task; + +#endif + +#ifndef __ASSEMBLY__ +#define INIT_THREAD_FRAME0 \ + ((struct pt_regs *) \ + (sizeof(init_stack) + (unsigned long) init_stack - sizeof(struct user_context))) + +#define INIT_THREAD { \ + NULL, \ + (struct task_struct *) init_stack, \ + 0, 0, 0, 0, \ + { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, \ + 0, \ + { INIT_THREAD_FRAME0 }, \ +} + +/* + * do necessary setup to start up a newly executed thread. + */ +#define start_thread(_regs, _pc, _usp) \ +do { \ + _regs->pc = (_pc); \ + _regs->psr &= ~PSR_S; \ + _regs->sp = (_usp); \ +} while(0) + +/* Free all resources held by a thread. */ +static inline void release_thread(struct task_struct *dead_task) +{ +} + +extern asmlinkage void save_user_regs(struct user_context *target); +extern asmlinkage void *restore_user_regs(const struct user_context *target, ...); + +#define copy_segments(tsk, mm) do { } while (0) +#define release_segments(mm) do { } while (0) +#define forget_segments() do { } while (0) + +/* + * Free current thread data structures etc.. + */ +static inline void exit_thread(void) +{ +} + +/* + * Return saved PC of a blocked thread. + */ +extern unsigned long thread_saved_pc(struct task_struct *tsk); + +unsigned long get_wchan(struct task_struct *p); + +#define KSTK_EIP(tsk) ((tsk)->thread.frame0->pc) +#define KSTK_ESP(tsk) ((tsk)->thread.frame0->sp) + +#define cpu_relax() barrier() +#define cpu_relax_lowlatency() cpu_relax() + +/* data cache prefetch */ +#define ARCH_HAS_PREFETCH +static inline void prefetch(const void *x) +{ + asm volatile("dcpl %0,gr0,#0" : : "r"(x)); +} + +#endif /* __ASSEMBLY__ */ +#endif /* _ASM_PROCESSOR_H */ |