include/asm-i386/apic.h

   1 #ifndef __ASM_APIC_H
   2 #define __ASM_APIC_H
   3
   4 #include <linux/pm.h>
   5 #include <asm/fixmap.h>
   6 #include <asm/apicdef.h>
   7 #include <asm/processor.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 enable_local_apic;
  20 extern int apic_verbosity;
  21
  22 static inline void lapic_disable(void)
  23 {
  24         enable_local_apic = -1;
  25         clear_bit(X86_FEATURE_APIC, boot_cpu_data.x86_capability);
  26 }
  27
  28 static inline void lapic_enable(void)
  29 {
  30         enable_local_apic = 1;
  31 }
  32
  33 /*
  34  * Define the default level of output to be very little
  35  * This can be turned up by using apic=verbose for more
  36  * information and apic=debug for _lots_ of information.
  37  * apic_verbosity is defined in apic.c
  38  */
  39 #define apic_printk(v, s, a...) do {       \
  40                 if ((v) <= apic_verbosity) \
  41                         printk(s, ##a);    \
  42         } while (0)
  43
  44
  45 #ifdef CONFIG_X86_LOCAL_APIC
  46
  47 /*
  48  * Basic functions accessing APICs.
  49  */
  50
  51 static __inline void apic_write(unsigned long reg, unsigned long v)
  52 {
  53         *((volatile unsigned long *)(APIC_BASE+reg)) = v;
  54 }
  55
  56 static __inline void apic_write_atomic(unsigned long reg, unsigned long v)
  57 {
  58         xchg((volatile unsigned long *)(APIC_BASE+reg), v);
  59 }
  60
  61 static __inline unsigned long apic_read(unsigned long reg)
  62 {
  63         return *((volatile unsigned long *)(APIC_BASE+reg));
  64 }
  65
  66 static __inline__ void apic_wait_icr_idle(void)
  67 {
  68         while ( apic_read( APIC_ICR ) & APIC_ICR_BUSY )
  69                 cpu_relax();
  70 }
  71
  72 int get_physical_broadcast(void);
  73
  74 #ifdef CONFIG_X86_GOOD_APIC
  75 # define FORCE_READ_AROUND_WRITE 0
  76 # define apic_read_around(x)
  77 # define apic_write_around(x,y) apic_write((x),(y))
  78 #else
  79 # define FORCE_READ_AROUND_WRITE 1
  80 # define apic_read_around(x) apic_read(x)
  81 # define apic_write_around(x,y) apic_write_atomic((x),(y))
  82 #endif
  83
  84 static inline void ack_APIC_irq(void)
  85 {
  86         /*
  87          * ack_APIC_irq() actually gets compiled as a single instruction:
  88          * - a single rmw on Pentium/82489DX
  89          * - a single write on P6+ cores (CONFIG_X86_GOOD_APIC)
  90          * ... yummie.
  91          */
  92
  93         /* Docs say use 0 for future compatibility */
  94         apic_write_around(APIC_EOI, 0);
  95 }
  96
  97 extern void (*wait_timer_tick)(void);
  98
  99 extern int get_maxlvt(void);
 100 extern void clear_local_APIC(void);
 101 extern void connect_bsp_APIC (void);
 102 extern void disconnect_bsp_APIC (int virt_wire_setup);
 103 extern void disable_local_APIC (void);
 104 extern void lapic_shutdown (void);
 105 extern int verify_local_APIC (void);
 106 extern void cache_APIC_registers (void);
 107 extern void sync_Arb_IDs (void);
 108 extern void init_bsp_APIC (void);
 109 extern void setup_local_APIC (void);
 110 extern void init_apic_mappings (void);
 111 extern void smp_local_timer_interrupt (struct pt_regs * regs);
 112 extern void setup_boot_APIC_clock (void);
 113 extern void setup_secondary_APIC_clock (void);
 114 extern int APIC_init_uniprocessor (void);
 115 extern void disable_APIC_timer(void);
 116 extern void enable_APIC_timer(void);
 117
 118 extern void enable_NMI_through_LVT0 (void * dummy);
 119
 120 extern int disable_timer_pin_1;
 121
 122 void smp_send_timer_broadcast_ipi(struct pt_regs *regs);
 123 void switch_APIC_timer_to_ipi(void *cpumask);
 124 void switch_ipi_to_APIC_timer(void *cpumask);
 125 #define ARCH_APICTIMER_STOPS_ON_C3      1
 126
 127 extern int timer_over_8254;
 128
 129 #else /* !CONFIG_X86_LOCAL_APIC */
 130 static inline void lapic_shutdown(void) { }
 131
 132 #endif /* !CONFIG_X86_LOCAL_APIC */
 133
 134 #endif /* __ASM_APIC_H */