include/asm-i386/apic.h

   1 #ifndef __ASM_APIC_H
   2 #define __ASM_APIC_H
   3
   4 #include <linux/pm.h>
   5 #include <linux/delay.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 apic_verbosity;
  21
  22 /*
  23  * Define the default level of output to be very little
  24  * This can be turned up by using apic=verbose for more
  25  * information and apic=debug for _lots_ of information.
  26  * apic_verbosity is defined in apic.c
  27  */
  28 #define apic_printk(v, s, a...) do {       \
  29                 if ((v) <= apic_verbosity) \
  30                         printk(s, ##a);    \
  31         } while (0)
  32
  33
  34 extern void generic_apic_probe(void);
  35
  36 #ifdef CONFIG_X86_LOCAL_APIC
  37
  38 /*
  39  * Basic functions accessing APICs.
  40  */
  41 #ifdef CONFIG_PARAVIRT
  42 #include <asm/paravirt.h>
  43 #else
  44 #define apic_write native_apic_write
  45 #define apic_write_atomic native_apic_write_atomic
  46 #define apic_read native_apic_read
  47 #define setup_boot_clock setup_boot_APIC_clock
  48 #define setup_secondary_clock setup_secondary_APIC_clock
  49 #endif
  50
  51 static __inline fastcall void native_apic_write(unsigned long reg,
  52                                                 unsigned long v)
  53 {
  54         *((volatile unsigned long *)(APIC_BASE+reg)) = v;
  55 }
  56
  57 static __inline fastcall void native_apic_write_atomic(unsigned long reg,
  58                                                        unsigned long v)
  59 {
  60         xchg((volatile unsigned long *)(APIC_BASE+reg), v);
  61 }
  62
  63 static __inline fastcall unsigned long native_apic_read(unsigned long reg)
  64 {
  65         return *((volatile unsigned long *)(APIC_BASE+reg));
  66 }
  67
  68 void apic_wait_icr_idle(void);
  69 unsigned long safe_apic_wait_icr_idle(void);
  70 int get_physical_broadcast(void);
  71
  72 #ifdef CONFIG_X86_GOOD_APIC
  73 # define FORCE_READ_AROUND_WRITE 0
  74 # define apic_read_around(x)
  75 # define apic_write_around(x,y) apic_write((x),(y))
  76 #else
  77 # define FORCE_READ_AROUND_WRITE 1
  78 # define apic_read_around(x) apic_read(x)
  79 # define apic_write_around(x,y) apic_write_atomic((x),(y))
  80 #endif
  81
  82 static inline void ack_APIC_irq(void)
  83 {
  84         /*
  85          * ack_APIC_irq() actually gets compiled as a single instruction:
  86          * - a single rmw on Pentium/82489DX
  87          * - a single write on P6+ cores (CONFIG_X86_GOOD_APIC)
  88          * ... yummie.
  89          */
  90
  91         /* Docs say use 0 for future compatibility */
  92         apic_write_around(APIC_EOI, 0);
  93 }
  94
  95 extern int lapic_get_maxlvt(void);
  96 extern void clear_local_APIC(void);
  97 extern void connect_bsp_APIC (void);
  98 extern void disconnect_bsp_APIC (int virt_wire_setup);
  99 extern void disable_local_APIC (void);
 100 extern void lapic_shutdown (void);
 101 extern int verify_local_APIC (void);
 102 extern void cache_APIC_registers (void);
 103 extern void sync_Arb_IDs (void);
 104 extern void init_bsp_APIC (void);
 105 extern void setup_local_APIC (void);
 106 extern void init_apic_mappings (void);
 107 extern void smp_local_timer_interrupt (void);
 108 extern void setup_boot_APIC_clock (void);
 109 extern void setup_secondary_APIC_clock (void);
 110 extern int APIC_init_uniprocessor (void);
 111
 112 extern void enable_NMI_through_LVT0 (void * dummy);
 113
 114 #define ARCH_APICTIMER_STOPS_ON_C3      1
 115
 116 extern int timer_over_8254;
 117 extern int local_apic_timer_c2_ok;
 118
 119 #else /* !CONFIG_X86_LOCAL_APIC */
 120 static inline void lapic_shutdown(void) { }
 121
 122 #endif /* !CONFIG_X86_LOCAL_APIC */
 123
 124 #endif /* __ASM_APIC_H */