5 #include <linux/delay.h>
7 #include <asm/fixmap.h>
9 #include <asm/apicdef.h>
10 #include <asm/processor.h>
11 #include <asm/system.h>
19 #define APIC_VERBOSE 1
22 extern int apic_verbosity;
25 * Define the default level of output to be very little
26 * This can be turned up by using apic=verbose for more
27 * information and apic=debug for _lots_ of information.
28 * apic_verbosity is defined in apic.c
30 #define apic_printk(v, s, a...) do { \
31 if ((v) <= apic_verbosity) \
36 extern void generic_apic_probe(void);
38 #if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_XEN)
41 * Basic functions accessing APICs.
43 #ifdef CONFIG_PARAVIRT
44 #include <asm/paravirt.h>
46 #define apic_write native_apic_write
47 #define apic_write_atomic native_apic_write_atomic
48 #define apic_read native_apic_read
49 #define setup_boot_clock setup_boot_APIC_clock
50 #define setup_secondary_clock setup_secondary_APIC_clock
53 static __inline fastcall void native_apic_write(unsigned long reg,
56 *((volatile unsigned long *)(APIC_BASE+reg)) = v;
59 static __inline fastcall void native_apic_write_atomic(unsigned long reg,
62 xchg((volatile unsigned long *)(APIC_BASE+reg), v);
65 static __inline fastcall unsigned long native_apic_read(unsigned long reg)
67 return *((volatile unsigned long *)(APIC_BASE+reg));
70 void apic_wait_icr_idle(void);
71 unsigned long safe_apic_wait_icr_idle(void);
72 int get_physical_broadcast(void);
74 #ifdef CONFIG_X86_GOOD_APIC
75 # define FORCE_READ_AROUND_WRITE 0
76 # define apic_read_around(x)
77 # define apic_write_around(x,y) apic_write((x),(y))
79 # define FORCE_READ_AROUND_WRITE 1
80 # define apic_read_around(x) apic_read(x)
81 # define apic_write_around(x,y) apic_write_atomic((x),(y))
84 static inline void ack_APIC_irq(void)
87 * ack_APIC_irq() actually gets compiled as a single instruction:
88 * - a single rmw on Pentium/82489DX
89 * - a single write on P6+ cores (CONFIG_X86_GOOD_APIC)
93 /* Docs say use 0 for future compatibility */
94 apic_write_around(APIC_EOI, 0);
97 extern int lapic_get_maxlvt(void);
98 extern void clear_local_APIC(void);
99 extern void connect_bsp_APIC (void);
100 extern void disconnect_bsp_APIC (int virt_wire_setup);
101 extern void disable_local_APIC (void);
102 extern void lapic_shutdown (void);
103 extern int verify_local_APIC (void);
104 extern void cache_APIC_registers (void);
105 extern void sync_Arb_IDs (void);
106 extern void init_bsp_APIC (void);
107 extern void setup_local_APIC (void);
108 extern void init_apic_mappings (void);
109 extern void smp_local_timer_interrupt (void);
110 extern void setup_boot_APIC_clock (void);
111 extern void setup_secondary_APIC_clock (void);
112 extern int APIC_init_uniprocessor (void);
114 extern void enable_NMI_through_LVT0 (void * dummy);
116 #define ARCH_APICTIMER_STOPS_ON_C3 1
118 extern int timer_over_8254;
119 extern int local_apic_timer_c2_ok;
121 extern int local_apic_timer_disabled;
123 #else /* !CONFIG_X86_LOCAL_APIC || CONFIG_XEN */
125 static inline void lapic_shutdown(void) { }
126 #define local_apic_timer_c2_ok 1
128 #ifdef CONFIG_X86_LOCAL_APIC
129 extern int APIC_init_uniprocessor (void);
132 #endif /* !CONFIG_X86_LOCAL_APIC */
134 #endif /* __ASM_APIC_H */