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/processor.h>
   9 #include <asm/system.h>
  10
  11 #define Dprintk(x...)
  12
  13 /*
  14  * Debugging macros
  15  */
  16 #define APIC_QUIET   0
  17 #define APIC_VERBOSE 1
  18 #define APIC_DEBUG   2
  19
  20 extern int enable_local_apic;
  21 extern int apic_verbosity;
  22
  23 static inline void lapic_disable(void)
  24 {
  25         enable_local_apic = -1;
  26         clear_bit(X86_FEATURE_APIC, boot_cpu_data.x86_capability);
  27 }
  28
  29 static inline void lapic_enable(void)
  30 {
  31         enable_local_apic = 1;
  32 }
  33
  34 /*
  35  * Define the default level of output to be very little
  36  * This can be turned up by using apic=verbose for more
  37  * information and apic=debug for _lots_ of information.
  38  * apic_verbosity is defined in apic.c
  39  */
  40 #define apic_printk(v, s, a...) do {       \
  41                 if ((v) <= apic_verbosity) \
  42                         printk(s, ##a);    \
  43         } while (0)
  44
  45
  46 #ifdef CONFIG_X86_LOCAL_APIC
  47
  48 /*
  49  * Basic functions accessing APICs.
  50  */
  51
  52 static __inline void apic_write(unsigned long reg, unsigned long v)
  53 {
  54         *((volatile unsigned long *)(APIC_BASE+reg)) = v;
  55 }
  56
  57 static __inline void apic_write_atomic(unsigned long reg, unsigned long v)
  58 {
  59         xchg((volatile unsigned long *)(APIC_BASE+reg), v);
  60 }
  61
  62 static __inline unsigned long apic_read(unsigned long reg)
  63 {
  64         return *((volatile unsigned long *)(APIC_BASE+reg));
  65 }
  66
  67 static __inline__ void apic_wait_icr_idle(void)
  68 {
  69         while ( apic_read( APIC_ICR ) & APIC_ICR_BUSY )
  70                 cpu_relax();
  71 }
  72
  73 int get_physical_broadcast(void);
  74
  75 #ifdef CONFIG_X86_GOOD_APIC
  76 # define FORCE_READ_AROUND_WRITE 0
  77 # define apic_read_around(x)
  78 # define apic_write_around(x,y) apic_write((x),(y))
  79 #else
  80 # define FORCE_READ_AROUND_WRITE 1
  81 # define apic_read_around(x) apic_read(x)
  82 # define apic_write_around(x,y) apic_write_atomic((x),(y))
  83 #endif
  84
  85 static inline void ack_APIC_irq(void)
  86 {
  87         /*
  88          * ack_APIC_irq() actually gets compiled as a single instruction:
  89          * - a single rmw on Pentium/82489DX
  90          * - a single write on P6+ cores (CONFIG_X86_GOOD_APIC)
  91          * ... yummie.
  92          */
  93
  94         /* Docs say use 0 for future compatibility */
  95         apic_write_around(APIC_EOI, 0);
  96 }
  97
  98 extern void (*wait_timer_tick)(void);
  99
 100 extern int get_maxlvt(void);
 101 extern void clear_local_APIC(void);
 102 extern void connect_bsp_APIC (void);
 103 extern void disconnect_bsp_APIC (int virt_wire_setup);
 104 extern void disable_local_APIC (void);
 105 extern void lapic_shutdown (void);
 106 extern int verify_local_APIC (void);
 107 extern void cache_APIC_registers (void);
 108 extern void sync_Arb_IDs (void);
 109 extern void init_bsp_APIC (void);
 110 extern void setup_local_APIC (void);
 111 extern void init_apic_mappings (void);
 112 extern void smp_local_timer_interrupt (struct pt_regs * regs);
 113 extern void setup_boot_APIC_clock (void);
 114 extern void setup_secondary_APIC_clock (void);
 115 extern void setup_apic_nmi_watchdog (void);
 116 extern int reserve_lapic_nmi(void);
 117 extern void release_lapic_nmi(void);
 118 extern void disable_timer_nmi_watchdog(void);
 119 extern void enable_timer_nmi_watchdog(void);
 120 extern void nmi_watchdog_tick (struct pt_regs * regs);
 121 extern int APIC_init_uniprocessor (void);
 122 extern void disable_APIC_timer(void);
 123 extern void enable_APIC_timer(void);
 124
 125 extern void enable_NMI_through_LVT0 (void * dummy);
 126
 127 extern unsigned int nmi_watchdog;
 128 #define NMI_NONE        0
 129 #define NMI_IO_APIC     1
 130 #define NMI_LOCAL_APIC  2
 131 #define NMI_INVALID     3
 132
 133 #else /* !CONFIG_X86_LOCAL_APIC */
 134 static inline void lapic_shutdown(void) { }
 135
 136 #endif /* !CONFIG_X86_LOCAL_APIC */
 137
 138 #endif /* __ASM_APIC_H */