release/src/linux/linux/include/asm-i386/apic.h

   1 #ifndef __ASM_APIC_H
   2 #define __ASM_APIC_H
   3
   4 #include <linux/config.h>
   5 #include <linux/pm.h>
   6 #include <asm/apicdef.h>
   7 #include <asm/system.h>
   8
   9 #ifdef CONFIG_X86_LOCAL_APIC
  10
  11 #define APIC_DEBUG 0
  12
  13 #if APIC_DEBUG
  14 #define Dprintk(x...) printk(x)
  15 #else
  16 #define Dprintk(x...)
  17 #endif
  18
  19 /*
  20  * Basic functions accessing APICs.
  21  */
  22
  23 static __inline void apic_write(unsigned long reg, unsigned long v)
  24 {
  25         *((volatile unsigned long *)(APIC_BASE+reg)) = v;
  26 }
  27
  28 static __inline void apic_write_atomic(unsigned long reg, unsigned long v)
  29 {
  30         xchg((volatile unsigned long *)(APIC_BASE+reg), v);
  31 }
  32
  33 static __inline unsigned long apic_read(unsigned long reg)
  34 {
  35         return *((volatile unsigned long *)(APIC_BASE+reg));
  36 }
  37
  38 static __inline__ void apic_wait_icr_idle(void)
  39 {
  40         do { } while ( apic_read( APIC_ICR ) & APIC_ICR_BUSY );
  41 }
  42
  43 #ifdef CONFIG_X86_GOOD_APIC
  44 # define FORCE_READ_AROUND_WRITE 0
  45 # define apic_read_around(x)
  46 # define apic_write_around(x,y) apic_write((x),(y))
  47 #else
  48 # define FORCE_READ_AROUND_WRITE 1
  49 # define apic_read_around(x) apic_read(x)
  50 # define apic_write_around(x,y) apic_write_atomic((x),(y))
  51 #endif
  52
  53 static inline void ack_APIC_irq(void)
  54 {
  55         /*
  56          * ack_APIC_irq() actually gets compiled as a single instruction:
  57          * - a single rmw on Pentium/82489DX
  58          * - a single write on P6+ cores (CONFIG_X86_GOOD_APIC)
  59          * ... yummie.
  60          */
  61
  62         /* Docs say use 0 for future compatibility */
  63         apic_write_around(APIC_EOI, 0);
  64 }
  65
  66 extern int get_maxlvt(void);
  67 extern void clear_local_APIC(void);
  68 extern void connect_bsp_APIC (void);
  69 extern void disconnect_bsp_APIC (void);
  70 extern void disable_local_APIC (void);
  71 extern int verify_local_APIC (void);
  72 extern void cache_APIC_registers (void);
  73 extern void sync_Arb_IDs (void);
  74 extern void init_bsp_APIC (void);
  75 extern void setup_local_APIC (void);
  76 extern void init_apic_mappings (void);
  77 extern void smp_local_timer_interrupt (struct pt_regs * regs);
  78 extern void setup_APIC_clocks (void);
  79 extern void setup_apic_nmi_watchdog (void);
  80 extern void nmi_watchdog_tick (struct pt_regs * regs);
  81 extern int APIC_init_uniprocessor (void);
  82 extern void disable_APIC_timer(void);
  83 extern void enable_APIC_timer(void);
  84
  85 extern struct pm_dev *apic_pm_register(pm_dev_t, unsigned long, pm_callback);
  86 extern void apic_pm_unregister(struct pm_dev*);
  87
  88 extern unsigned int apic_timer_irqs [NR_CPUS];
  89 extern int check_nmi_watchdog (void);
  90
  91 extern unsigned int nmi_watchdog;
  92 #define NMI_NONE        0
  93 #define NMI_IO_APIC     1
  94 #define NMI_LOCAL_APIC  2
  95 #define NMI_INVALID     3
  96
  97 #endif /* CONFIG_X86_LOCAL_APIC */
  98
  99 #endif /* __ASM_APIC_H */