128 строки
3.2 KiB
C
128 строки
3.2 KiB
C
/* 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 */
|