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 extern unsigned boot_cpu_id;
  48
  49 /*
  50  * Basic functions accessing APICs.
  51  */
  52 #ifdef CONFIG_PARAVIRT
  53 #include <asm/paravirt.h>
  54 extern int is_vsmp_box(void);
  55 #else
  56 #define apic_write native_apic_write
  57 #define apic_write_atomic native_apic_write_atomic
  58 #define apic_read native_apic_read
  59 #define setup_boot_clock setup_boot_APIC_clock
  60 #define setup_secondary_clock setup_secondary_APIC_clock
  61 static int inline is_vsmp_box(void)
  62 {
  63         return 0;
  64 }
  65 #endif
  66
  67 static inline void native_apic_write(unsigned long reg, u32 v)
  68 {
  69         *((volatile u32 *)(APIC_BASE + reg)) = v;
  70 }
  71
  72 static inline void native_apic_write_atomic(unsigned long reg, u32 v)
  73 {
  74         (void) xchg((u32*)(APIC_BASE + reg), v);
  75 }
  76
  77 static inline u32 native_apic_read(unsigned long reg)
  78 {
  79         return *((volatile u32 *)(APIC_BASE + reg));
  80 }
  81
  82 extern void apic_wait_icr_idle(void);
  83 extern u32 safe_apic_wait_icr_idle(void);
  84 extern int get_physical_broadcast(void);
  85
  86 #ifdef CONFIG_X86_GOOD_APIC
  87 # define FORCE_READ_AROUND_WRITE 0
  88 # define apic_read_around(x)
  89 # define apic_write_around(x, y) apic_write((x), (y))
  90 #else
  91 # define FORCE_READ_AROUND_WRITE 1
  92 # define apic_read_around(x) apic_read(x)
  93 # define apic_write_around(x, y) apic_write_atomic((x), (y))
  94 #endif
  95
  96 static inline void ack_APIC_irq(void)
  97 {
  98         /*
  99          * ack_APIC_irq() actually gets compiled as a single instruction:
 100          * - a single rmw on Pentium/82489DX
 101          * - a single write on P6+ cores (CONFIG_X86_GOOD_APIC)
 102          * ... yummie.
 103          */
 104
 105         /* Docs say use 0 for future compatibility */
 106         apic_write_around(APIC_EOI, 0);
 107 }
 108
 109 extern int lapic_get_maxlvt(void);
 110 extern void clear_local_APIC(void);
 111 extern void connect_bsp_APIC(void);
 112 extern void disconnect_bsp_APIC(int virt_wire_setup);
 113 extern void disable_local_APIC(void);
 114 extern void lapic_shutdown(void);
 115 extern int verify_local_APIC(void);
 116 extern void cache_APIC_registers(void);
 117 extern void sync_Arb_IDs(void);
 118 extern void init_bsp_APIC(void);
 119 extern void setup_local_APIC(void);
 120 extern void end_local_APIC_setup(void);
 121 extern void init_apic_mappings(void);
 122 extern void setup_boot_APIC_clock(void);
 123 extern void setup_secondary_APIC_clock(void);
 124 extern int APIC_init_uniprocessor(void);
 125 extern void enable_NMI_through_LVT0(void);
 126
 127 /*
 128  * On 32bit this is mach-xxx local
 129  */
 130 #ifdef CONFIG_X86_64
 131 extern void early_init_lapic_mapping(void);
 132 #endif
 133
 134 extern u8 setup_APIC_eilvt_mce(u8 vector, u8 msg_type, u8 mask);
 135 extern u8 setup_APIC_eilvt_ibs(u8 vector, u8 msg_type, u8 mask);
 136
 137 extern int apic_is_clustered_box(void);
 138
 139 #else /* !CONFIG_X86_LOCAL_APIC */
 140 static inline void lapic_shutdown(void) { }
 141 #define local_apic_timer_c2_ok          1
 142
 143 #endif /* !CONFIG_X86_LOCAL_APIC */
 144
 145 #endif /* __ASM_APIC_H */