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 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 extern void generic_apic_probe(void);
  34
  35 #ifdef CONFIG_X86_LOCAL_APIC
  36
  37 /*
  38  * Basic functions accessing APICs.
  39  */
  40
  41 static __inline void apic_write(unsigned long reg, unsigned long v)
  42 {
  43         *((volatile unsigned long *)(APIC_BASE+reg)) = v;
  44 }
  45
  46 static __inline void apic_write_atomic(unsigned long reg, unsigned long v)
  47 {
  48         xchg((volatile unsigned long *)(APIC_BASE+reg), v);
  49 }
  50
  51 static __inline unsigned long apic_read(unsigned long reg)
  52 {
  53         return *((volatile unsigned long *)(APIC_BASE+reg));
  54 }
  55
  56 static __inline__ void apic_wait_icr_idle(void)
  57 {
  58         while ( apic_read( APIC_ICR ) & APIC_ICR_BUSY )
  59                 cpu_relax();
  60 }
  61
  62 int get_physical_broadcast(void);
  63
  64 #ifdef CONFIG_X86_GOOD_APIC
  65 # define FORCE_READ_AROUND_WRITE 0
  66 # define apic_read_around(x)
  67 # define apic_write_around(x,y) apic_write((x),(y))
  68 #else
  69 # define FORCE_READ_AROUND_WRITE 1
  70 # define apic_read_around(x) apic_read(x)
  71 # define apic_write_around(x,y) apic_write_atomic((x),(y))
  72 #endif
  73
  74 static inline void ack_APIC_irq(void)
  75 {
  76         /*
  77          * ack_APIC_irq() actually gets compiled as a single instruction:
  78          * - a single rmw on Pentium/82489DX
  79          * - a single write on P6+ cores (CONFIG_X86_GOOD_APIC)
  80          * ... yummie.
  81          */
  82
  83         /* Docs say use 0 for future compatibility */
  84         apic_write_around(APIC_EOI, 0);
  85 }
  86
  87 extern void (*wait_timer_tick)(void);
  88
  89 extern int get_maxlvt(void);
  90 extern void clear_local_APIC(void);
  91 extern void connect_bsp_APIC (void);
  92 extern void disconnect_bsp_APIC (int virt_wire_setup);
  93 extern void disable_local_APIC (void);
  94 extern void lapic_shutdown (void);
  95 extern int verify_local_APIC (void);
  96 extern void cache_APIC_registers (void);
  97 extern void sync_Arb_IDs (void);
  98 extern void init_bsp_APIC (void);
  99 extern void setup_local_APIC (void);
 100 extern void init_apic_mappings (void);
 101 extern void smp_local_timer_interrupt (void);
 102 extern void setup_boot_APIC_clock (void);
 103 extern void setup_secondary_APIC_clock (void);
 104 extern int APIC_init_uniprocessor (void);
 105 extern void disable_APIC_timer(void);
 106 extern void enable_APIC_timer(void);
 107
 108 extern void enable_NMI_through_LVT0 (void * dummy);
 109
 110 void smp_send_timer_broadcast_ipi(void);
 111 void switch_APIC_timer_to_ipi(void *cpumask);
 112 void switch_ipi_to_APIC_timer(void *cpumask);
 113 #define ARCH_APICTIMER_STOPS_ON_C3      1
 114
 115 extern int timer_over_8254;
 116
 117 #else /* !CONFIG_X86_LOCAL_APIC */
 118 static inline void lapic_shutdown(void) { }
 119
 120 #endif /* !CONFIG_X86_LOCAL_APIC */
 121
 122 #endif /* __ASM_APIC_H */