LXR linux-bk/include/asm-i386/apic.h

   1#ifndef __ASM_APIC_H
   2#define __ASM_APIC_H
   3
   4#include <linux/config.h>
   5#include <linux/pm.h>
   6#include <asm/fixmap.h>
   7#include <asm/apicdef.h>
   8#include <asm/system.h>
   9
  10#define APIC_DEBUG 0
  11
  12#if APIC_DEBUG
  13#define Dprintk(x...) printk(x)
  14#else
  15#define Dprintk(x...)
  16#endif
  17
  18#ifdef CONFIG_X86_LOCAL_APIC
  19
  20/*
  21 * Basic functions accessing APICs.
  22 */
  23
  24static __inline void apic_write(unsigned long reg, unsigned long v)
  25{
  26        *((volatile unsigned long *)(APIC_BASE+reg)) = v;
  27}
  28
  29static __inline void apic_write_atomic(unsigned long reg, unsigned long v)
  30{
  31        xchg((volatile unsigned long *)(APIC_BASE+reg), v);
  32}
  33
  34static __inline unsigned long apic_read(unsigned long reg)
  35{
  36        return *((volatile unsigned long *)(APIC_BASE+reg));
  37}
  38
  39static __inline__ void apic_wait_icr_idle(void)
  40{
  41        do { } while ( apic_read( APIC_ICR ) & APIC_ICR_BUSY );
  42}
  43
  44int get_physical_broadcast(void);
  45
  46#ifdef CONFIG_X86_GOOD_APIC
  47# define FORCE_READ_AROUND_WRITE 0
  48# define apic_read_around(x)
  49# define apic_write_around(x,y) apic_write((x),(y))
  50#else
  51# define FORCE_READ_AROUND_WRITE 1
  52# define apic_read_around(x) apic_read(x)
  53# define apic_write_around(x,y) apic_write_atomic((x),(y))
  54#endif
  55
  56static inline void ack_APIC_irq(void)
  57{
  58        /*
  59         * ack_APIC_irq() actually gets compiled as a single instruction:
  60         * - a single rmw on Pentium/82489DX
  61         * - a single write on P6+ cores (CONFIG_X86_GOOD_APIC)
  62         * ... yummie.
  63         */
  64
  65        /* Docs say use 0 for future compatibility */
  66        apic_write_around(APIC_EOI, 0);
  67}
  68
  69extern void (*wait_timer_tick)(void);
  70
  71extern int get_maxlvt(void);
  72extern void clear_local_APIC(void);
  73extern void connect_bsp_APIC (void);
  74extern void disconnect_bsp_APIC (void);
  75extern void disable_local_APIC (void);
  76extern int verify_local_APIC (void);
  77extern void cache_APIC_registers (void);
  78extern void sync_Arb_IDs (void);
  79extern void init_bsp_APIC (void);
  80extern void setup_local_APIC (void);
  81extern void init_apic_mappings (void);
  82extern void smp_local_timer_interrupt (struct pt_regs * regs);
  83extern void setup_boot_APIC_clock (void);
  84extern void setup_secondary_APIC_clock (void);
  85extern void setup_apic_nmi_watchdog (void);
  86extern int reserve_lapic_nmi(void);
  87extern void release_lapic_nmi(void);
  88extern void disable_timer_nmi_watchdog(void);
  89extern void enable_timer_nmi_watchdog(void);
  90extern void nmi_watchdog_tick (struct pt_regs * regs);
  91extern int APIC_init_uniprocessor (void);
  92extern void disable_APIC_timer(void);
  93extern void enable_APIC_timer(void);
  94
  95extern int check_nmi_watchdog (void);
  96extern void enable_NMI_through_LVT0 (void * dummy);
  97
  98extern unsigned int nmi_watchdog;
  99#define NMI_NONE        0
 100#define NMI_IO_APIC     1
 101#define NMI_LOCAL_APIC  2
 102#define NMI_INVALID     3
 103
 104#endif /* CONFIG_X86_LOCAL_APIC */
 105
 106#endif /* __ASM_APIC_H */
 107