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 Dprintk(x...)
  11
  12 /*
  13  * Debugging macros
  14  */
  15 #define APIC_QUIET   0
  16 #define APIC_VERBOSE 1
  17 #define APIC_DEBUG   2
  18
  19 extern int apic_verbosity;
  20
  21 /*
  22  * Define the default level of output to be very little
  23  * This can be turned up by using apic=verbose for more
  24  * information and apic=debug for _lots_ of information.
  25  * apic_verbosity is defined in apic.c
  26  */
  27 #define apic_printk(v, s, a...) do {       \
  28                 if ((v) <= apic_verbosity) \
  29                         printk(s, ##a);    \
  30         } while (0)
  31
  32
  33 #ifdef CONFIG_X86_LOCAL_APIC
  34
  35 /*
  36  * Basic functions accessing APICs.
  37  */
  38
  39 static __inline void apic_write(unsigned long reg, unsigned long v)
  40 {
  41         *((volatile unsigned long *)(APIC_BASE+reg)) = v;
  42 }
  43
  44 static __inline void apic_write_atomic(unsigned long reg, unsigned long v)
  45 {
  46         xchg((volatile unsigned long *)(APIC_BASE+reg), v);
  47 }
  48
  49 static __inline unsigned long apic_read(unsigned long reg)
  50 {
  51         return *((volatile unsigned long *)(APIC_BASE+reg));
  52 }
  53
  54 static __inline__ void apic_wait_icr_idle(void)
  55 {
  56         while ( apic_read( APIC_ICR ) & APIC_ICR_BUSY )
  57                 cpu_relax();
  58 }
  59
  60 int get_physical_broadcast(void);
  61
  62 #ifdef CONFIG_X86_GOOD_APIC
  63 # define FORCE_READ_AROUND_WRITE 0
  64 # define apic_read_around(x)
  65 # define apic_write_around(x,y) apic_write((x),(y))
  66 #else
  67 # define FORCE_READ_AROUND_WRITE 1
  68 # define apic_read_around(x) apic_read(x)
  69 # define apic_write_around(x,y) apic_write_atomic((x),(y))
  70 #endif
  71
  72 static inline void ack_APIC_irq(void)
  73 {
  74         /*
  75          * ack_APIC_irq() actually gets compiled as a single instruction:
  76          * - a single rmw on Pentium/82489DX
  77          * - a single write on P6+ cores (CONFIG_X86_GOOD_APIC)
  78          * ... yummie.
  79          */
  80
  81         /* Docs say use 0 for future compatibility */
  82         apic_write_around(APIC_EOI, 0);
  83 }
  84
  85 extern void (*wait_timer_tick)(void);
  86
  87 extern int get_maxlvt(void);
  88 extern void clear_local_APIC(void);
  89 extern void connect_bsp_APIC (void);
  90 extern void disconnect_bsp_APIC (void);
  91 extern void disable_local_APIC (void);
  92 extern void lapic_shutdown (void);
  93 extern int verify_local_APIC (void);
  94 extern void cache_APIC_registers (void);
  95 extern void sync_Arb_IDs (void);
  96 extern void init_bsp_APIC (void);
  97 extern void setup_local_APIC (void);
  98 extern void init_apic_mappings (void);
  99 extern void smp_local_timer_interrupt (struct pt_regs * regs);
 100 extern void setup_boot_APIC_clock (void);
 101 extern void setup_secondary_APIC_clock (void);
 102 extern void setup_apic_nmi_watchdog (void);
 103 extern int reserve_lapic_nmi(void);
 104 extern void release_lapic_nmi(void);
 105 extern void disable_timer_nmi_watchdog(void);
 106 extern void enable_timer_nmi_watchdog(void);
 107 extern void nmi_watchdog_tick (struct pt_regs * regs);
 108 extern int APIC_init_uniprocessor (void);
 109 extern void disable_APIC_timer(void);
 110 extern void enable_APIC_timer(void);
 111
 112 extern void enable_NMI_through_LVT0 (void * dummy);
 113
 114 extern unsigned int nmi_watchdog;
 115 #define NMI_NONE        0
 116 #define NMI_IO_APIC     1
 117 #define NMI_LOCAL_APIC  2
 118 #define NMI_INVALID     3
 119
 120 #else /* !CONFIG_X86_LOCAL_APIC */
 121 static inline void lapic_shutdown(void) { }
 122
 123 #endif /* !CONFIG_X86_LOCAL_APIC */
 124
 125 #endif /* __ASM_APIC_H */