include/asm-x86/apic.h

   1 #ifndef _ASM_X86_APIC_H
   2 #define _ASM_X86_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 ARCH_APICTIMER_STOPS_ON_C3      1
  12
  13 #define Dprintk(x...)
  14
  15 /*
  16  * Debugging macros
  17  */
  18 #define APIC_QUIET   0
  19 #define APIC_VERBOSE 1
  20 #define APIC_DEBUG   2
  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 extern int apic_verbosity;
  39 extern int timer_over_8254;
  40 extern int local_apic_timer_c2_ok;
  41 extern int local_apic_timer_disabled;
  42
  43 extern int apic_runs_main_timer;
  44 extern int ioapic_force;
  45 extern int disable_apic;
  46 extern int disable_apic_timer;
  47
  48 /*
  49  * Basic functions accessing APICs.
  50  */
  51 #ifdef CONFIG_PARAVIRT
  52 #include <asm/paravirt.h>
  53 #else
  54 #define apic_write native_apic_write
  55 #define apic_write_atomic native_apic_write_atomic
  56 #define apic_read native_apic_read
  57 #define setup_boot_clock setup_boot_APIC_clock
  58 #define setup_secondary_clock setup_secondary_APIC_clock
  59 #endif
  60
  61 extern int is_vsmp_box(void);
  62
  63 static inline void native_apic_write(unsigned long reg, u32 v)
  64 {
  65         *((volatile u32 *)(APIC_BASE + reg)) = v;
  66 }
  67
  68 static inline void native_apic_write_atomic(unsigned long reg, u32 v)
  69 {
  70         (void)xchg((u32 *)(APIC_BASE + reg), v);
  71 }
  72
  73 static inline u32 native_apic_read(unsigned long reg)
  74 {
  75         return *((volatile u32 *)(APIC_BASE + reg));
  76 }
  77
  78 extern void apic_wait_icr_idle(void);
  79 extern u32 safe_apic_wait_icr_idle(void);
  80 extern int get_physical_broadcast(void);
  81
  82 #ifdef CONFIG_X86_GOOD_APIC
  83 # define FORCE_READ_AROUND_WRITE 0
  84 # define apic_read_around(x)
  85 # define apic_write_around(x, y) apic_write((x), (y))
  86 #else
  87 # define FORCE_READ_AROUND_WRITE 1
  88 # define apic_read_around(x) apic_read(x)
  89 # define apic_write_around(x, y) apic_write_atomic((x), (y))
  90 #endif
  91
  92 static inline void ack_APIC_irq(void)
  93 {
  94         /*
  95          * ack_APIC_irq() actually gets compiled as a single instruction:
  96          * - a single rmw on Pentium/82489DX
  97          * - a single write on P6+ cores (CONFIG_X86_GOOD_APIC)
  98          * ... yummie.
  99          */
 100
 101         /* Docs say use 0 for future compatibility */
 102         apic_write_around(APIC_EOI, 0);
 103 }
 104
 105 extern int lapic_get_maxlvt(void);
 106 extern void clear_local_APIC(void);
 107 extern void connect_bsp_APIC(void);
 108 extern void disconnect_bsp_APIC(int virt_wire_setup);
 109 extern void disable_local_APIC(void);
 110 extern void lapic_shutdown(void);
 111 extern int verify_local_APIC(void);
 112 extern void cache_APIC_registers(void);
 113 extern void sync_Arb_IDs(void);
 114 extern void init_bsp_APIC(void);
 115 extern void setup_local_APIC(void);
 116 extern void end_local_APIC_setup(void);
 117 extern void init_apic_mappings(void);
 118 extern void setup_boot_APIC_clock(void);
 119 extern void setup_secondary_APIC_clock(void);
 120 extern int APIC_init_uniprocessor(void);
 121 extern void enable_NMI_through_LVT0(void);
 122
 123 /*
 124  * On 32bit this is mach-xxx local
 125  */
 126 #ifdef CONFIG_X86_64
 127 extern void early_init_lapic_mapping(void);
 128 #endif
 129
 130 extern u8 setup_APIC_eilvt_mce(u8 vector, u8 msg_type, u8 mask);
 131 extern u8 setup_APIC_eilvt_ibs(u8 vector, u8 msg_type, u8 mask);
 132
 133 extern int apic_is_clustered_box(void);
 134
 135 #else /* !CONFIG_X86_LOCAL_APIC */
 136 static inline void lapic_shutdown(void) { }
 137 #define local_apic_timer_c2_ok          1
 138
 139 #endif /* !CONFIG_X86_LOCAL_APIC */
 140
 141 #endif /* __ASM_APIC_H */