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 local_apic_timer_c2_ok;
  40
  41 extern int ioapic_force;
  42
  43 extern int disable_apic;
  44 /*
  45  * Basic functions accessing APICs.
  46  */
  47 #ifdef CONFIG_PARAVIRT
  48 #include <asm/paravirt.h>
  49 #else
  50 #define apic_write native_apic_write
  51 #define apic_write_atomic native_apic_write_atomic
  52 #define apic_read native_apic_read
  53 #define setup_boot_clock setup_boot_APIC_clock
  54 #define setup_secondary_clock setup_secondary_APIC_clock
  55 #endif
  56
  57 extern int is_vsmp_box(void);
  58
  59 static inline void native_apic_write(unsigned long reg, u32 v)
  60 {
  61         *((volatile u32 *)(APIC_BASE + reg)) = v;
  62 }
  63
  64 static inline void native_apic_write_atomic(unsigned long reg, u32 v)
  65 {
  66         (void)xchg((u32 *)(APIC_BASE + reg), v);
  67 }
  68
  69 static inline u32 native_apic_read(unsigned long reg)
  70 {
  71         return *((volatile u32 *)(APIC_BASE + reg));
  72 }
  73
  74 extern void apic_wait_icr_idle(void);
  75 extern u32 safe_apic_wait_icr_idle(void);
  76 extern int get_physical_broadcast(void);
  77
  78 #ifdef CONFIG_X86_GOOD_APIC
  79 # define FORCE_READ_AROUND_WRITE 0
  80 # define apic_read_around(x)
  81 # define apic_write_around(x, y) apic_write((x), (y))
  82 #else
  83 # define FORCE_READ_AROUND_WRITE 1
  84 # define apic_read_around(x) apic_read(x)
  85 # define apic_write_around(x, y) apic_write_atomic((x), (y))
  86 #endif
  87
  88 static inline void ack_APIC_irq(void)
  89 {
  90         /*
  91          * ack_APIC_irq() actually gets compiled as a single instruction:
  92          * - a single rmw on Pentium/82489DX
  93          * - a single write on P6+ cores (CONFIG_X86_GOOD_APIC)
  94          * ... yummie.
  95          */
  96
  97         /* Docs say use 0 for future compatibility */
  98         apic_write_around(APIC_EOI, 0);
  99 }
 100
 101 extern int lapic_get_maxlvt(void);
 102 extern void clear_local_APIC(void);
 103 extern void connect_bsp_APIC(void);
 104 extern void disconnect_bsp_APIC(int virt_wire_setup);
 105 extern void disable_local_APIC(void);
 106 extern void lapic_shutdown(void);
 107 extern int verify_local_APIC(void);
 108 extern void cache_APIC_registers(void);
 109 extern void sync_Arb_IDs(void);
 110 extern void init_bsp_APIC(void);
 111 extern void setup_local_APIC(void);
 112 extern void end_local_APIC_setup(void);
 113 extern void init_apic_mappings(void);
 114 extern void setup_boot_APIC_clock(void);
 115 extern void setup_secondary_APIC_clock(void);
 116 extern int APIC_init_uniprocessor(void);
 117 extern void enable_NMI_through_LVT0(void);
 118
 119 /*
 120  * On 32bit this is mach-xxx local
 121  */
 122 #ifdef CONFIG_X86_64
 123 extern void early_init_lapic_mapping(void);
 124 extern int apic_is_clustered_box(void);
 125 #else
 126 static inline int apic_is_clustered_box(void)
 127 {
 128         return 0;
 129 }
 130 #endif
 131
 132 extern u8 setup_APIC_eilvt_mce(u8 vector, u8 msg_type, u8 mask);
 133 extern u8 setup_APIC_eilvt_ibs(u8 vector, u8 msg_type, u8 mask);
 134
 135
 136 #else /* !CONFIG_X86_LOCAL_APIC */
 137 static inline void lapic_shutdown(void) { }
 138 #define local_apic_timer_c2_ok          1
 139 static inline void init_apic_mappings(void) { }
 140
 141 #endif /* !CONFIG_X86_LOCAL_APIC */
 142
 143 #endif /* __ASM_APIC_H */