forked from Minki/linux
177 lines
4.3 KiB
C
177 lines
4.3 KiB
C
/* MN10300 Processor specifics
|
|
*
|
|
* Copyright (C) 2007 Matsushita Electric Industrial Co., Ltd.
|
|
* Copyright (C) 2007 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 Licence
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the Licence, or (at your option) any later version.
|
|
*/
|
|
|
|
#ifndef _ASM_PROCESSOR_H
|
|
#define _ASM_PROCESSOR_H
|
|
|
|
#include <linux/threads.h>
|
|
#include <linux/thread_info.h>
|
|
#include <asm/page.h>
|
|
#include <asm/ptrace.h>
|
|
#include <asm/cpu-regs.h>
|
|
#include <asm/uaccess.h>
|
|
#include <asm/current.h>
|
|
|
|
/* Forward declaration, a strange C thing */
|
|
struct task_struct;
|
|
struct mm_struct;
|
|
|
|
/*
|
|
* Default implementation of macro that returns current
|
|
* instruction pointer ("program counter").
|
|
*/
|
|
#define current_text_addr() \
|
|
({ \
|
|
void *__pc; \
|
|
asm("mov pc,%0" : "=a"(__pc)); \
|
|
__pc; \
|
|
})
|
|
|
|
extern void get_mem_info(unsigned long *mem_base, unsigned long *mem_size);
|
|
|
|
extern void show_registers(struct pt_regs *regs);
|
|
|
|
/*
|
|
* CPU type and hardware bug flags. Kept separately for each CPU.
|
|
* Members of this structure are referenced in head.S, so think twice
|
|
* before touching them. [mj]
|
|
*/
|
|
|
|
struct mn10300_cpuinfo {
|
|
int type;
|
|
unsigned long loops_per_jiffy;
|
|
char hard_math;
|
|
};
|
|
|
|
extern struct mn10300_cpuinfo boot_cpu_data;
|
|
|
|
#ifdef CONFIG_SMP
|
|
#if CONFIG_NR_CPUS < 2 || CONFIG_NR_CPUS > 8
|
|
# error Sorry, NR_CPUS should be 2 to 8
|
|
#endif
|
|
extern struct mn10300_cpuinfo cpu_data[];
|
|
#define current_cpu_data cpu_data[smp_processor_id()]
|
|
#else /* CONFIG_SMP */
|
|
#define cpu_data &boot_cpu_data
|
|
#define current_cpu_data boot_cpu_data
|
|
#endif /* CONFIG_SMP */
|
|
|
|
extern void identify_cpu(struct mn10300_cpuinfo *);
|
|
extern void print_cpu_info(struct mn10300_cpuinfo *);
|
|
extern void dodgy_tsc(void);
|
|
#define cpu_relax() barrier()
|
|
|
|
/*
|
|
* User space process size: 1.75GB (default).
|
|
*/
|
|
#define TASK_SIZE 0x70000000
|
|
|
|
/*
|
|
* Where to put the userspace stack by default
|
|
*/
|
|
#define STACK_TOP 0x70000000
|
|
#define STACK_TOP_MAX STACK_TOP
|
|
|
|
/* This decides where the kernel will search for a free chunk of vm
|
|
* space during mmap's.
|
|
*/
|
|
#define TASK_UNMAPPED_BASE 0x30000000
|
|
|
|
struct fpu_state_struct {
|
|
unsigned long fs[32]; /* fpu registers */
|
|
unsigned long fpcr; /* fpu control register */
|
|
};
|
|
|
|
struct thread_struct {
|
|
struct pt_regs *uregs; /* userspace register frame */
|
|
unsigned long pc; /* kernel PC */
|
|
unsigned long sp; /* kernel SP */
|
|
unsigned long a3; /* kernel FP */
|
|
unsigned long wchan;
|
|
unsigned long usp;
|
|
unsigned long fpu_flags;
|
|
#define THREAD_USING_FPU 0x00000001 /* T if this task is using the FPU */
|
|
#define THREAD_HAS_FPU 0x00000002 /* T if this task owns the FPU right now */
|
|
struct fpu_state_struct fpu_state;
|
|
};
|
|
|
|
#define INIT_THREAD \
|
|
{ \
|
|
.uregs = init_uregs, \
|
|
.pc = 0, \
|
|
.sp = 0, \
|
|
.a3 = 0, \
|
|
.wchan = 0, \
|
|
}
|
|
|
|
#define INIT_MMAP \
|
|
{ &init_mm, 0, 0, NULL, PAGE_SHARED, VM_READ | VM_WRITE | VM_EXEC, 1, \
|
|
NULL, NULL }
|
|
|
|
/*
|
|
* do necessary setup to start up a newly executed thread
|
|
*/
|
|
static inline void start_thread(struct pt_regs *regs,
|
|
unsigned long new_pc, unsigned long new_sp)
|
|
{
|
|
regs->epsw = EPSW_nSL | EPSW_IE | EPSW_IM;
|
|
regs->pc = new_pc;
|
|
regs->sp = new_sp;
|
|
}
|
|
|
|
|
|
/* Free all resources held by a thread. */
|
|
extern void release_thread(struct task_struct *);
|
|
|
|
/*
|
|
* 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 task_pt_regs(task) ((task)->thread.uregs)
|
|
#define KSTK_EIP(task) (task_pt_regs(task)->pc)
|
|
#define KSTK_ESP(task) (task_pt_regs(task)->sp)
|
|
|
|
#define KSTK_TOP(info) \
|
|
({ \
|
|
(unsigned long)(info) + THREAD_SIZE; \
|
|
})
|
|
|
|
#define ARCH_HAS_PREFETCH
|
|
#define ARCH_HAS_PREFETCHW
|
|
|
|
static inline void prefetch(const void *x)
|
|
{
|
|
#ifdef CONFIG_MN10300_CACHE_ENABLED
|
|
#ifdef CONFIG_MN10300_PROC_MN103E010
|
|
asm volatile ("nop; nop; dcpf (%0)" : : "r"(x));
|
|
#else
|
|
asm volatile ("dcpf (%0)" : : "r"(x));
|
|
#endif
|
|
#endif
|
|
}
|
|
|
|
static inline void prefetchw(const void *x)
|
|
{
|
|
#ifdef CONFIG_MN10300_CACHE_ENABLED
|
|
#ifdef CONFIG_MN10300_PROC_MN103E010
|
|
asm volatile ("nop; nop; dcpf (%0)" : : "r"(x));
|
|
#else
|
|
asm volatile ("dcpf (%0)" : : "r"(x));
|
|
#endif
|
|
#endif
|
|
}
|
|
|
|
#endif /* _ASM_PROCESSOR_H */
|