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#ifndef __ASM_SH64_PROCESSOR_H

#define __ASM_SH64_PROCESSOR_H

/*

 * This file is subject to the terms and conditions of the GNU General Public

 * License.  See the file "COPYING" in the main directory of this archive

 * for more details.

 *

 * include/asm-sh64/processor.h

 *

 * Copyright (C) 2000, 2001  Paolo Alberelli

 * Copyright (C) 2003  Paul Mundt

 *

 */

#include <asm/page.h>

#ifndef __ASSEMBLY__

#include <asm/types.h>

#include <asm/cache.h>

#include <asm/tlb.h>

#include <asm/registers.h>

#include <linux/threads.h>

/*

 * Default implementation of macro that returns current

 * instruction pointer ("program counter").

 */

#define current_text_addr() ({ \

void *pc; \

unsigned long long __dummy; \

__asm__("gettr  " __t0 ", %1\n\t" \

        "pta    4, " __t0 "\n\t" \

        "gettr  " __t0 ", %0\n\t" \

        "ptabs  %1, " __t0 "\n\t"       \

        :"=r" (pc), "=r" (__dummy) \

        : "1" (__dummy)); \

pc; })

/*

 *  CPU type and hardware bug flags. Kept separately for each CPU.

 */

enum cpu_type {

        CPU_SH5_101,

        CPU_SH5_103,

        CPU_SH_NONE

};

struct sh_cpuinfo {

        enum cpu_type type;

        unsigned long loops_per_jiffy;

        char    hard_math;

        unsigned long *pgd_quick;

        unsigned long *pmd_quick;

        unsigned long *pte_quick;

        unsigned long pgtable_cache_sz;

        unsigned int cpu_clock, master_clock, bus_clock, module_clock;

        /* Cache info */

        struct cache_info icache;

        struct cache_info dcache;

        /* TLB info */

        struct tlb_info itlb;

        struct tlb_info dtlb;

};

extern struct sh_cpuinfo boot_cpu_data;

#define cpu_data (&boot_cpu_data)

#define current_cpu_data boot_cpu_data

#endif

/*

 * User space process size: 2GB - 4k.

 */

#define TASK_SIZE       0x7ffff000UL

/* This decides where the kernel will search for a free chunk of vm

 * space during mmap's.

 */

#define TASK_UNMAPPED_BASE      (TASK_SIZE / 3)

/*

 * Bit of SR register

 *

 * FD-bit:

 *     When it's set, it means the processor doesn't have right to use FPU,

 *     and it results exception when the floating operation is executed.

 *

 * IMASK-bit:

 *     Interrupt level mask

 *

 * STEP-bit:

 *     Single step bit

 *

 */

#define SR_FD    0x00008000

#ifdef ST_DEBUG

#define SR_MMU   0x84000000

#else

#define SR_MMU   0x80000000

#endif

#define SR_IMASK 0x000000f0

#define SR_SSTEP 0x08000000

#ifndef __ASSEMBLY__

/*

 * FPU structure and data : require 8-byte alignment as we need to access it

   with fld.p, fst.p

 */

struct sh_fpu_hard_struct {

        unsigned long fp_regs[64];

        unsigned int fpscr;

        /* long status; * software status information */

};

#if 0

/* Dummy fpu emulator  */

struct sh_fpu_soft_struct {

        unsigned long long fp_regs[32];

        unsigned int fpscr;

        unsigned char lookahead;

        unsigned long entry_pc;

};

#endif

union sh_fpu_union {

        struct sh_fpu_hard_struct hard;

        // struct sh_fpu_soft_struct soft;

        /* 'hard' itself only produces 32 bit alignment, yet we need

           to access it using 64 bit load/store as well. */

        unsigned long long alignment_dummy;

};

struct thread_struct {

        unsigned long sp;

        unsigned long pc;

        unsigned long trap_no, error_code;

        unsigned long address;

        /* Hardware debugging registers may come here */

        struct pt_regs *kregs;

        /* floating point info */

        union sh_fpu_union fpu;

};

#define INIT_MMAP \

{ &init_mm, 0, 0, NULL, PAGE_SHARED, VM_READ | VM_WRITE | VM_EXEC, 1, NULL, NULL }

extern  struct pt_regs fake_swapper_regs;

#define INIT_THREAD  {                                          \

        sizeof(init_stack) + (long) &init_stack, /* sp */       \

        0,                                        /* pc */       \

        0, 0,                                                     \

        0,                                                       \

        &fake_swapper_regs,                     /*kregs*/       \

        {{{0,}},}                                /* fpu state */ \

}

/*

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

 */

#define SR_USER (SR_MMU | SR_FD)

#define start_thread(regs, new_pc, new_sp)                      \

        set_fs(USER_DS);                                        \

        regs->sr = SR_USER;     /* User mode. */                \

        regs->pc = new_pc - 4;  /* Compensate syscall exit */   \

        regs->pc |= 1;          /* Set SHmedia ! */             \

        regs->regs[18] = 0;                                      \

        regs->regs[15] = new_sp

/* Forward declaration, a strange C thing */

struct task_struct;

struct mm_struct;

/* Free all resources held by a thread. */

extern void release_thread(struct task_struct *);

/*

 * create a kernel thread without removing it from tasklists

 */

extern int arch_kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);

/*

 * Bus types

 */

#define EISA_bus 0

#define EISA_bus__is_a_macro /* for versions in ksyms.c */

#define MCA_bus 0

#define MCA_bus__is_a_macro /* for versions in ksyms.c */

/* Copy and release all segment info associated with a VM */

#define copy_segments(p, mm)    do { } while(0)

#define release_segments(mm)    do { } while(0)

#define forget_segments()       do { } while (0)

/*

 * FPU lazy state save handling.

 */

extern __inline__ void release_fpu(void)

{

        unsigned long long __dummy;

        /* Set FD flag in SR */

        __asm__ __volatile__("getcon    " __c0 ", %0\n\t"

                             "or        %0, %1, %0\n\t"

                             "putcon    %0, " __c0 "\n\t"

                             : "=&r" (__dummy)

                             : "r" (SR_FD));

}

extern __inline__ void grab_fpu(void)

{

        unsigned long long __dummy;

        /* Clear out FD flag in SR */

        __asm__ __volatile__("getcon    " __c0 ", %0\n\t"

                             "and       %0, %1, %0\n\t"

                             "putcon    %0, " __c0 "\n\t"

                             : "=&r" (__dummy)

                             : "r" (~SR_FD));

}

/* Round to nearest, no exceptions on inexact, overflow, underflow,

   zero-divide, invalid.  Configure option for whether to flush denorms to

   zero, or except if a denorm is encountered.  */

#if defined(CONFIG_SH64_FPU_DENORM_FLUSH)

#define FPSCR_INIT  0x00040000

#else

#define FPSCR_INIT  0x00000000

#endif

/* Save the current FP regs */

void fpsave(struct sh_fpu_hard_struct *fpregs);

/* Initialise the FP state of a task */

void fpinit(struct sh_fpu_hard_struct *fpregs);

/*

 * Return saved PC of a blocked thread.

 */

extern __inline__ unsigned long thread_saved_pc(struct thread_struct *t)

{

        return t->pc;

}

extern unsigned long get_wchan(struct task_struct *p);

#define KSTK_EIP(tsk)  ((tsk)->thread.pc)

#define KSTK_ESP(tsk)  ((tsk)->thread.sp)

#endif  /* __ASSEMBLY__ */

#define TASK_STKPAGES   2               /* Must be power of 2. 2 minimum */

#define THREAD_SIZE     (TASK_STKPAGES * PAGE_SIZE)

#define INIT_TASK_SIZE  THREAD_SIZE

#ifndef __ASSEMBLY__

extern struct task_struct *last_task_used_math;

extern struct task_struct * alloc_task_struct(void);

extern void free_task_struct(struct task_struct *);

#define get_task_struct(tsk)      atomic_inc(&mem_map[MAP_NR(tsk)].count)

#define init_task       (init_task_union.task)

#define init_stack      (init_task_union.stack)

#endif  /* __ASSEMBLY__ */

#endif /* __ASM_SH64_PROCESSOR_H */