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/*

 *  asm-i386/acpi.h

 *

 *  Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>

 *  Copyright (C) 2001 Patrick Mochel <mochel@osdl.org>

  *

 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

 *

 *  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.

 *

 *  This program is distributed in the hope that it will be useful,

 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *  GNU General Public License for more details.

 *

 *  You should have received a copy of the GNU General Public License

 *  along with this program; if not, write to the Free Software

 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 *

 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

 */

#ifndef _ASM_ACPI_H

#define _ASM_ACPI_H

#ifdef __KERNEL__

#define COMPILER_DEPENDENT_INT64   long long

#define COMPILER_DEPENDENT_UINT64  unsigned long long

/*

 * Calling conventions:

 *

 * ACPI_SYSTEM_XFACE        - Interfaces to host OS (handlers, threads)

 * ACPI_EXTERNAL_XFACE      - External ACPI interfaces

 * ACPI_INTERNAL_XFACE      - Internal ACPI interfaces

 * ACPI_INTERNAL_VAR_XFACE  - Internal variable-parameter list interfaces

 */

#define ACPI_SYSTEM_XFACE

#define ACPI_EXTERNAL_XFACE

#define ACPI_INTERNAL_XFACE

#define ACPI_INTERNAL_VAR_XFACE

/* Asm macros */

#define ACPI_ASM_MACROS

#define BREAKPOINT3

#define ACPI_DISABLE_IRQS() __cli()

#define ACPI_ENABLE_IRQS()  __sti()

#define ACPI_FLUSH_CPU_CACHE()  wbinvd()

static inline int

__acpi_acquire_global_lock (unsigned int *lock)

{

        unsigned int old, new, val;

        do {

                old = *lock;

                new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));

                val = cmpxchg(lock, old, new);

        } while (unlikely (val != old));

        return (new < 3) ? -1 : 0;

}

static inline int

__acpi_release_global_lock (unsigned int *lock)

{

        unsigned int old, new, val;

        do {

                old = *lock;

                new = old & ~0x3;

                val = cmpxchg(lock, old, new);

        } while (unlikely (val != old));

        return old & 0x1;

}

#define ACPI_ACQUIRE_GLOBAL_LOCK(GLptr, Acq) \

        ((Acq) = __acpi_acquire_global_lock((unsigned int *) GLptr))

#define ACPI_RELEASE_GLOBAL_LOCK(GLptr, Acq) \

        ((Acq) = __acpi_release_global_lock((unsigned int *) GLptr))

/*

 * Math helper asm macros

 */

#define ACPI_DIV_64_BY_32(n_hi, n_lo, d32, q32, r32) \

        asm("divl %2;"        \

        :"=a"(q32), "=d"(r32) \

        :"r"(d32),            \

        "0"(n_lo), "1"(n_hi))

#define ACPI_SHIFT_RIGHT_64(n_hi, n_lo) \

    asm("shrl   $1,%2;"             \

        "rcrl   $1,%3;"             \

        :"=r"(n_hi), "=r"(n_lo)     \

        :"0"(n_hi), "1"(n_lo))

#ifdef CONFIG_ACPI_BOOT 

extern int acpi_lapic;

extern int acpi_ioapic;

extern int acpi_noirq;

extern int acpi_strict;

extern int acpi_disabled;

extern int acpi_ht;

static inline void disable_acpi(void) { acpi_disabled = 1; acpi_ht = 0; }

/* Fixmap pages to reserve for ACPI boot-time tables (see fixmap.h) */

#define FIX_ACPI_PAGES 4

#else   /* !CONFIG_ACPI_BOOT */

#  define acpi_lapic 0

#  define acpi_ioapic 0

#endif  /* !CONFIG_ACPI_BOOT */

#ifdef CONFIG_ACPI_PCI

static inline void acpi_noirq_set(void) { acpi_noirq = 1; }

extern int acpi_irq_balance_set(char *str);

#else

static inline void acpi_noirq_set(void) { }

static inline int acpi_irq_balance_set(char *str) { return 0; }

#endif

#ifdef CONFIG_ACPI_SLEEP

extern unsigned long saved_eip;

extern unsigned long saved_esp;

extern unsigned long saved_ebp;

extern unsigned long saved_ebx;

extern unsigned long saved_esi;

extern unsigned long saved_edi;

static inline void acpi_save_register_state(unsigned long return_point)

{

        saved_eip = return_point;

        asm volatile ("movl %%esp,(%0)" : "=m" (saved_esp));

        asm volatile ("movl %%ebp,(%0)" : "=m" (saved_ebp));

        asm volatile ("movl %%ebx,(%0)" : "=m" (saved_ebx));

        asm volatile ("movl %%edi,(%0)" : "=m" (saved_edi));

        asm volatile ("movl %%esi,(%0)" : "=m" (saved_esi));

}

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

/* routines for saving/restoring kernel state */

extern int acpi_save_state_mem(void);

extern int acpi_save_state_disk(void);

extern void acpi_restore_state_mem(void);

extern unsigned long acpi_wakeup_address;

extern void do_suspend_lowlevel_s4bios(int resume);

/* early initialization routine */

extern void acpi_reserve_bootmem(void);

#endif /*CONFIG_ACPI_SLEEP*/

#endif /*__KERNEL__*/

#endif /*_ASM_ACPI_H*/