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/* 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/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 *);

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 */

Filemanager

Name Type Size Permission Actions
Kbuild File 314 B 0644
asm-offsets.h File 35 B 0644
atomic.h File 4.02 KB 0644
bitops.h File 5.42 KB 0644
bug.h File 864 B 0644
bugs.h File 561 B 0644
busctl-regs.h File 7.8 KB 0644
cache.h File 2.06 KB 0644
cacheflush.h File 7.6 KB 0644
checksum.h File 2.09 KB 0644
cmpxchg.h File 2.65 KB 0644
cpu-regs.h File 16.61 KB 0644
current.h File 922 B 0644
debugger.h File 1.2 KB 0644
delay.h File 597 B 0644
div64.h File 3.21 KB 0644
dma-mapping.h File 636 B 0644
dma.h File 3.09 KB 0644
dmactl-regs.h File 532 B 0644
elf.h File 4.49 KB 0644
emergency-restart.h File 43 B 0644
exceptions.h File 4.74 KB 0644
fpu.h File 3.57 KB 0644
frame.inc File 2.37 KB 0644
ftrace.h File 12 B 0644
futex.h File 31 B 0644
gdb-stub.h File 5.42 KB 0644
hardirq.h File 1.68 KB 0644
highmem.h File 3.01 KB 0644
hw_irq.h File 483 B 0644
intctl-regs.h File 2.26 KB 0644
io.h File 7.67 KB 0644
irq.h File 1.11 KB 0644
irq_regs.h File 751 B 0644
irqflags.h File 4.05 KB 0644
kdebug.h File 561 B 0644
kgdb.h File 1.7 KB 0644
kmap_types.h File 160 B 0644
kprobes.h File 1.59 KB 0644
linkage.h File 593 B 0644
local.h File 31 B 0644
local64.h File 33 B 0644
mc146818rtc.h File 26 B 0644
mmu.h File 434 B 0644
mmu_context.h File 4.44 KB 0644
module.h File 677 B 0644
nmi.h File 500 B 0644
page.h File 3.63 KB 0644
page_offset.h File 302 B 0644
pci.h File 2.17 KB 0644
percpu.h File 32 B 0644
pgalloc.h File 1.49 KB 0644
pgtable.h File 15.68 KB 0644
pio-regs.h File 7.53 KB 0644
processor.h File 4.12 KB 0644
ptrace.h File 805 B 0644
reset-regs.h File 1.8 KB 0644
rtc-regs.h File 3.57 KB 0644
rtc.h File 692 B 0644
rwlock.h File 2.98 KB 0644
serial-regs.h File 8.85 KB 0644
serial.h File 1.02 KB 0644
setup.h File 574 B 0644
shmparam.h File 182 B 0644
signal.h File 888 B 0644
smp.h File 3.06 KB 0644
smsc911x.h File 27 B 0644
spinlock.h File 3.84 KB 0644
spinlock_types.h File 445 B 0644
string.h File 1.03 KB 0644
switch_to.h File 1.49 KB 0644
syscall.h File 2.38 KB 0644
termios.h File 387 B 0644
thread_info.h File 4.36 KB 0644
timer-regs.h File 20.72 KB 0644
timex.h File 843 B 0644
tlb.h File 941 B 0644
tlbflush.h File 3.45 KB 0644
topology.h File 34 B 0644
types.h File 620 B 0644
uaccess.h File 7.78 KB 0644
ucontext.h File 673 B 0644
unaligned.h File 678 B 0644
unistd.h File 1.34 KB 0644
user.h File 1.91 KB 0644
vga.h File 471 B 0644
xor.h File 29 B 0644