include/asm-x86/apic_32.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 /*
  21  * Define the default level of output to be very little
  22  * This can be turned up by using apic=verbose for more
  23  * information and apic=debug for _lots_ of information.
  24  * apic_verbosity is defined in apic.c
  25  */
  26 #define apic_printk(v, s, a...) do {       \
  27                 if ((v) <= apic_verbosity) \
  28                         printk(s, ##a);    \
  29         } while (0)
  30
  31
  32 extern void generic_apic_probe(void);
  33
  34 #ifdef CONFIG_X86_LOCAL_APIC
  35
  36 extern int apic_verbosity;
  37 extern int timer_over_8254;
  38 extern int local_apic_timer_c2_ok;
  39 extern int local_apic_timer_disabled;
  40
  41 /*
  42  * Basic functions accessing APICs.
  43  */
  44 #ifdef CONFIG_PARAVIRT
  45 #include <asm/paravirt.h>
  46 #else
  47 #define apic_write native_apic_write
  48 #define apic_write_atomic native_apic_write_atomic
  49 #define apic_read native_apic_read
  50 #define setup_boot_clock setup_boot_APIC_clock
  51 #define setup_secondary_clock setup_secondary_APIC_clock
  52 #endif
  53
  54 static __inline fastcall void native_apic_write(unsigned long reg, u32 v)
  55 {
  56         *((volatile u32 *)(APIC_BASE + reg)) = v;
  57 }
  58
  59 static __inline fastcall void native_apic_write_atomic(unsigned long reg, u32 v)
  60 {
  61         (void) xchg((u32 *)(APIC_BASE + reg), v);
  62 }
  63
  64 static __inline fastcall u32 native_apic_read(unsigned long reg)
  65 {
  66         return *((volatile u32 *)(APIC_BASE + reg));
  67 }
  68
  69 extern void apic_wait_icr_idle(void);
  70 extern u32 safe_apic_wait_icr_idle(void);
  71 extern int get_physical_broadcast(void);
  72
  73 #ifdef CONFIG_X86_GOOD_APIC
  74 # define FORCE_READ_AROUND_WRITE 0
  75 # define apic_read_around(x)
  76 # define apic_write_around(x,y) apic_write((x),(y))
  77 #else
  78 # define FORCE_READ_AROUND_WRITE 1
  79 # define apic_read_around(x) apic_read(x)
  80 # define apic_write_around(x,y) apic_write_atomic((x),(y))
  81 #endif
  82
  83 static inline void ack_APIC_irq(void)
  84 {
  85         /*
  86          * ack_APIC_irq() actually gets compiled as a single instruction:
  87          * - a single rmw on Pentium/82489DX
  88          * - a single write on P6+ cores (CONFIG_X86_GOOD_APIC)
  89          * ... yummie.
  90          */
  91
  92         /* Docs say use 0 for future compatibility */
  93         apic_write_around(APIC_EOI, 0);
  94 }
  95
  96 extern int lapic_get_maxlvt(void);
  97 extern void clear_local_APIC(void);
  98 extern void connect_bsp_APIC(void);
  99 extern void disconnect_bsp_APIC(int virt_wire_setup);
 100 extern void disable_local_APIC(void);
 101 extern void lapic_shutdown(void);
 102 extern int verify_local_APIC(void);
 103 extern void cache_APIC_registers(void);
 104 extern void sync_Arb_IDs(void);
 105 extern void init_bsp_APIC(void);
 106 extern void setup_local_APIC(void);
 107 extern void init_apic_mappings(void);
 108 extern void smp_local_timer_interrupt(void);
 109 extern void setup_boot_APIC_clock(void);
 110 extern void setup_secondary_APIC_clock(void);
 111 extern int APIC_init_uniprocessor(void);
 112 extern void enable_NMI_through_LVT0(void *dummy);
 113
 114 #define ARCH_APICTIMER_STOPS_ON_C3      1
 115
 116 #else /* !CONFIG_X86_LOCAL_APIC */
 117 static inline void lapic_shutdown(void) { }
 118 #define local_apic_timer_c2_ok          1
 119
 120 #endif /* !CONFIG_X86_LOCAL_APIC */
 121
 122 #endif /* __ASM_APIC_H */