5 #include <asm/fixmap.h>
6 #include <asm/apicdef.h>
7 #include <asm/processor.h>
8 #include <asm/system.h>
16 #define APIC_VERBOSE 1
19 extern int enable_local_apic;
20 extern int apic_verbosity;
22 static inline void lapic_disable(void)
24 enable_local_apic = -1;
25 clear_bit(X86_FEATURE_APIC, boot_cpu_data.x86_capability);
28 static inline void lapic_enable(void)
30 enable_local_apic = 1;
34 * Define the default level of output to be very little
35 * This can be turned up by using apic=verbose for more
36 * information and apic=debug for _lots_ of information.
37 * apic_verbosity is defined in apic.c
39 #define apic_printk(v, s, a...) do { \
40 if ((v) <= apic_verbosity) \
45 extern void generic_apic_probe(void);
47 #ifdef CONFIG_X86_LOCAL_APIC
50 * Basic functions accessing APICs.
53 static __inline void apic_write(unsigned long reg, unsigned long v)
55 *((volatile unsigned long *)(APIC_BASE+reg)) = v;
58 static __inline void apic_write_atomic(unsigned long reg, unsigned long v)
60 xchg((volatile unsigned long *)(APIC_BASE+reg), v);
63 static __inline unsigned long apic_read(unsigned long reg)
65 return *((volatile unsigned long *)(APIC_BASE+reg));
68 static __inline__ void apic_wait_icr_idle(void)
70 while ( apic_read( APIC_ICR ) & APIC_ICR_BUSY )
74 int get_physical_broadcast(void);
76 #ifdef CONFIG_X86_GOOD_APIC
77 # define FORCE_READ_AROUND_WRITE 0
78 # define apic_read_around(x)
79 # define apic_write_around(x,y) apic_write((x),(y))
81 # define FORCE_READ_AROUND_WRITE 1
82 # define apic_read_around(x) apic_read(x)
83 # define apic_write_around(x,y) apic_write_atomic((x),(y))
86 static inline void ack_APIC_irq(void)
89 * ack_APIC_irq() actually gets compiled as a single instruction:
90 * - a single rmw on Pentium/82489DX
91 * - a single write on P6+ cores (CONFIG_X86_GOOD_APIC)
95 /* Docs say use 0 for future compatibility */
96 apic_write_around(APIC_EOI, 0);
99 extern void (*wait_timer_tick)(void);
101 extern int 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 init_apic_mappings (void);
113 extern void smp_local_timer_interrupt (struct pt_regs * regs);
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 disable_APIC_timer(void);
118 extern void enable_APIC_timer(void);
120 extern void enable_NMI_through_LVT0 (void * dummy);
122 void smp_send_timer_broadcast_ipi(struct pt_regs *regs);
123 void switch_APIC_timer_to_ipi(void *cpumask);
124 void switch_ipi_to_APIC_timer(void *cpumask);
125 #define ARCH_APICTIMER_STOPS_ON_C3 1
127 extern int timer_over_8254;
129 #else /* !CONFIG_X86_LOCAL_APIC */
130 static inline void lapic_shutdown(void) { }
132 #endif /* !CONFIG_X86_LOCAL_APIC */
134 #endif /* __ASM_APIC_H */