Subversion Repositories or1k

#ifndef _ASM_OR32_PROCESSOR_H

#define _ASM_OR32_PROCESSOR_H

#include <linux/config.h>

#include <asm/segment.h>

#include <asm/ptrace.h>

#include <asm/spr_defs.h>

#include <asm/board.h>

/*

 * Bus types

 */

#define EISA_bus__is_a_macro    1

#define EISA_bus 0

#define MCA_bus__is_a_macro     1

#define MCA_bus 0

/*

 * The or32 has no problems with write protection

 */

#define wp_works_ok__is_a_macro 1

#define wp_works_ok 1

/* MAX floating point unit state size (FSAVE/FRESTORE) */

#define FPSTATESIZE   (216/sizeof(unsigned char))

struct thread_struct {

        unsigned long  pc;              /* PC when last entered system */

        unsigned long  sr;              /* saved status register */

        unsigned long  ksp;             /* kernel stack pointer */

        unsigned long  usp;             /* user stack pointer */

        unsigned long  *regs;           /* pointer to saved register state */

        unsigned short fs;              /* saved fs (sfc, dfc) */

        unsigned long  crp[2];          /* cpu root pointer */

        unsigned long  esp0;            /* points to SR of stack frame */

        unsigned long  fp[8*3];

        unsigned long  fpcntl[3];       /* fp control regs */

        unsigned char  fpstate[FPSTATESIZE];  /* floating point state */

};

#define INIT_MMAP { &init_mm, 0, 0x40000000, __pgprot(_PAGE_PRESENT|_PAGE_ACCESSED), VM_READ | VM_WRITE | VM_EXEC }

#define INIT_TSS  {     0x100,        \

                        ((DCACHE << SPR_SR_DCE_BIT) | \

       (ICACHE << SPR_SR_ICE_BIT) | \

                         (DMMU   << SPR_SR_DME_BIT) | \

       (IMMU   << SPR_SR_IME_BIT) | \

        SPR_SR_IEE                | \

        SPR_SR_TEE                | \

        SPR_SR_SM),                 \

                        sizeof(init_kernel_stack) + (long) init_kernel_stack, \

}

#define SR_USER                     \

                        ((DCACHE << SPR_SR_DCE_BIT) | \

       (ICACHE << SPR_SR_ICE_BIT) | \

                         (DMMU   << SPR_SR_DME_BIT) | \

       (IMMU   << SPR_SR_IME_BIT) | \

        SPR_SR_IEE                | \

        SPR_SR_TEE)

#define alloc_kernel_stack()    __get_free_page(GFP_KERNEL)

#define free_kernel_stack(page) free_page((page))

/*

 * Do necessary setup to start up a newly executed thread.

 */

static inline void start_thread(struct pt_regs * regs, unsigned long pc, unsigned long usp)

{

#ifndef NO_MM

        unsigned long nilstate = 0;

#endif

        /* reads from user space */

        set_fs(USER_DS);

        regs->pc = pc;

        regs->sp = usp;

        regs->sr = SR_USER;

}

/*

 * Return saved PC of a blocked thread.

 */

extern inline unsigned long thread_saved_pc(struct thread_struct *t)

{

        return t->pc;

}

#endif