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 extern int apic_verbosity;
  23 extern int timer_over_8254;
  24 extern int local_apic_timer_c2_ok;
  25 extern int local_apic_timer_disabled;
  26
  27 extern int apic_runs_main_timer;
  28 extern int ioapic_force;
  29 extern int disable_apic_timer;
  30 extern unsigned boot_cpu_id;
  31
  32 /*
  33  * Define the default level of output to be very little
  34  * This can be turned up by using apic=verbose for more
  35  * information and apic=debug for _lots_ of information.
  36  * apic_verbosity is defined in apic.c
  37  */
  38 #define apic_printk(v, s, a...) do {       \
  39                 if ((v) <= apic_verbosity) \
  40                         printk(s, ##a);    \
  41         } while (0)
  42
  43
  44 extern void generic_apic_probe(void);
  45
  46 #ifdef CONFIG_X86_LOCAL_APIC
  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 static inline fastcall void native_apic_write(unsigned long reg, u32 v)
  62 {
  63         *((volatile u32 *)(APIC_BASE + reg)) = v;
  64 }
  65
  66 static inline fastcall void native_apic_write_atomic(unsigned long reg,
  67                                                      unsigned long v)
  68 {
  69         xchg((volatile unsigned long*)(APIC_BASE + reg), v);
  70 }
  71
  72 static inline fastcall u32 native_apic_read(unsigned long reg)
  73 {
  74         return *((volatile u32 *)(APIC_BASE + reg));
  75 }
  76
  77 extern void apic_wait_icr_idle(void);
  78 extern u32 safe_apic_wait_icr_idle(void);
  79 extern int get_physical_broadcast(void);
  80
  81 #ifdef CONFIG_X86_GOOD_APIC
  82 # define FORCE_READ_AROUND_WRITE 0
  83 # define apic_read_around(x)
  84 # define apic_write_around(x, y) apic_write((x), (y))
  85 #else
  86 # define FORCE_READ_AROUND_WRITE 1
  87 # define apic_read_around(x) apic_read(x)
  88 # define apic_write_around(x, y) apic_write_atomic((x), (y))
  89 #endif
  90
  91 static inline void ack_APIC_irq(void)
  92 {
  93         /*
  94          * ack_APIC_irq() actually gets compiled as a single instruction:
  95          * - a single rmw on Pentium/82489DX
  96          * - a single write on P6+ cores (CONFIG_X86_GOOD_APIC)
  97          * ... yummie.
  98          */
  99
 100         /* Docs say use 0 for future compatibility */
 101         apic_write_around(APIC_EOI, 0);
 102 }
 103
 104 extern int lapic_get_maxlvt(void);
 105 extern void clear_local_APIC(void);
 106 extern void connect_bsp_APIC(void);
 107 extern void disconnect_bsp_APIC(int virt_wire_setup);
 108 extern void disable_local_APIC(void);
 109 extern void lapic_shutdown(void);
 110 extern int verify_local_APIC(void);
 111 extern void cache_APIC_registers(void);
 112 extern void sync_Arb_IDs(void);
 113 extern void init_bsp_APIC(void);
 114 extern void setup_local_APIC(void);
 115 extern void end_local_APIC_setup(void);
 116 extern void init_apic_mappings(void);
 117 extern void setup_boot_APIC_clock(void);
 118 extern void setup_secondary_APIC_clock(void);
 119 extern int APIC_init_uniprocessor(void);
 120 extern void enable_NMI_through_LVT0(void *dummy);
 121
 122 /*
 123  * On 32bit this is mach-xxx local
 124  */
 125 #ifdef CONFIG_X86_64
 126 extern void setup_apic_routing(void);
 127 #endif
 128
 129 extern void setup_APIC_extended_lvt(unsigned char lvt_off, unsigned char vector,
 130                                     unsigned char msg_type, unsigned char mask);
 131
 132 extern int apic_is_clustered_box(void);
 133
 134 #else /* !CONFIG_X86_LOCAL_APIC */
 135 static inline void lapic_shutdown(void) { }
 136
 137 #endif /* !CONFIG_X86_LOCAL_APIC */
 138
 139 #endif /* __ASM_APIC_H */