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422 giacomo 1
/*
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 *  asm-i386/acpi.h
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 *
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 *  Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
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 *  Copyright (C) 2001 Patrick Mochel <mochel@osdl.org>
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  *
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 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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 *
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 *  This program is free software; you can redistribute it and/or modify
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 *  it under the terms of the GNU General Public License as published by
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 *  the Free Software Foundation; either version 2 of the License, or
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 *  (at your option) any later version.
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 *
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 *  This program is distributed in the hope that it will be useful,
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 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 *  GNU General Public License for more details.
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 *
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 *  You should have received a copy of the GNU General Public License
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 *  along with this program; if not, write to the Free Software
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 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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 *
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 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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 */
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#ifndef _ASM_ACPI_H
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#define _ASM_ACPI_H
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#ifdef __KERNEL__
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#define COMPILER_DEPENDENT_INT64   long long
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#define COMPILER_DEPENDENT_UINT64  unsigned long long
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/*
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 * Calling conventions:
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 *
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 * ACPI_SYSTEM_XFACE        - Interfaces to host OS (handlers, threads)
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 * ACPI_EXTERNAL_XFACE      - External ACPI interfaces
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 * ACPI_INTERNAL_XFACE      - Internal ACPI interfaces
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 * ACPI_INTERNAL_VAR_XFACE  - Internal variable-parameter list interfaces
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 */
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#define ACPI_SYSTEM_XFACE
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#define ACPI_EXTERNAL_XFACE
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#define ACPI_INTERNAL_XFACE
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#define ACPI_INTERNAL_VAR_XFACE
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/* Asm macros */
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#define ACPI_ASM_MACROS
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#define BREAKPOINT3
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#define ACPI_DISABLE_IRQS() local_irq_disable()
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#define ACPI_ENABLE_IRQS()  local_irq_enable()
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#define ACPI_FLUSH_CPU_CACHE()  wbinvd()
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/*
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 * A brief explanation as GNU inline assembly is a bit hairy
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 *  %0 is the output parameter in EAX ("=a")
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 *  %1 and %2 are the input parameters in ECX ("c")
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 *  and an immediate value ("i") respectively
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 *  All actual register references are preceded with "%%" as in "%%edx"
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 *  Immediate values in the assembly are preceded by "$" as in "$0x1"
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 *  The final asm parameter are the operation altered non-output registers.
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 */
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#define ACPI_ACQUIRE_GLOBAL_LOCK(GLptr, Acq) \
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    do { \
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        int dummy; \
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        asm("1:     movl (%1),%%eax;" \
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            "movl   %%eax,%%edx;" \
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            "andl   %2,%%edx;" \
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            "btsl   $0x1,%%edx;" \
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            "adcl   $0x0,%%edx;" \
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            "lock;  cmpxchgl %%edx,(%1);" \
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            "jnz    1b;" \
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            "cmpb   $0x3,%%dl;" \
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            "sbbl   %%eax,%%eax" \
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            :"=a"(Acq),"=c"(dummy):"c"(GLptr),"i"(~1L):"dx"); \
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    } while(0)
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#define ACPI_RELEASE_GLOBAL_LOCK(GLptr, Acq) \
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    do { \
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        int dummy; \
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        asm("1:     movl (%1),%%eax;" \
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            "movl   %%eax,%%edx;" \
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            "andl   %2,%%edx;" \
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            "lock;  cmpxchgl %%edx,(%1);" \
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            "jnz    1b;" \
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            "andl   $0x1,%%eax" \
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            :"=a"(Acq),"=c"(dummy):"c"(GLptr),"i"(~3L):"dx"); \
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    } while(0)
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/*
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 * Math helper asm macros
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 */
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#define ACPI_DIV_64_BY_32(n_hi, n_lo, d32, q32, r32) \
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        asm("divl %2;"        \
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        :"=a"(q32), "=d"(r32) \
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        :"r"(d32),            \
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        "0"(n_lo), "1"(n_hi))
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#define ACPI_SHIFT_RIGHT_64(n_hi, n_lo) \
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    asm("shrl   $1,%2;"             \
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        "rcrl   $1,%3;"             \
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        :"=r"(n_hi), "=r"(n_lo)     \
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        :"0"(n_hi), "1"(n_lo))
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#ifdef CONFIG_ACPI_BOOT 
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extern int acpi_lapic;
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extern int acpi_ioapic;
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/* Fixmap pages to reserve for ACPI boot-time tables (see fixmap.h) */
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#define FIX_ACPI_PAGES 4
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#ifdef CONFIG_X86_IO_APIC
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extern int skip_ioapic_setup;
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static inline void disable_ioapic_setup(void)
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{
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        skip_ioapic_setup = 1;
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}
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static inline int ioapic_setup_disabled(void)
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{
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        return skip_ioapic_setup;
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}
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#else
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static inline void disable_ioapic_setup(void)
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{ }
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#endif
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#else   /* CONFIG_ACPI_BOOT */
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#  define acpi_lapic 0
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#  define acpi_ioapic 0
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#endif
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#ifdef CONFIG_ACPI_SLEEP
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/* routines for saving/restoring kernel state */
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extern int acpi_save_state_mem(void);
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extern int acpi_save_state_disk(void);
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extern void acpi_restore_state_mem(void);
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extern unsigned long acpi_wakeup_address;
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/* early initialization routine */
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extern void acpi_reserve_bootmem(void);
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#endif /*CONFIG_ACPI_SLEEP*/
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#endif /*__KERNEL__*/
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#endif /*_ASM_ACPI_H*/