1 #ifndef _ASM_X86_APIC_H
2 #define _ASM_X86_APIC_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 #include <asm/cpufeature.h>
13 #define ARCH_APICTIMER_STOPS_ON_C3 1
21 #define APIC_VERBOSE 1
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 #ifdef CONFIG_X86_LOCAL_APIC
40 extern int apic_verbosity;
41 extern int local_apic_timer_c2_ok;
43 extern int ioapic_force;
45 extern int disable_apic;
47 * Basic functions accessing APICs.
49 #ifdef CONFIG_PARAVIRT
50 #include <asm/paravirt.h>
53 #define apic_write native_apic_mem_write
54 #define apic_write_atomic native_apic_mem_write_atomic
55 #define apic_read native_apic_mem_read
57 #define setup_boot_clock setup_boot_APIC_clock
58 #define setup_secondary_clock setup_secondary_APIC_clock
61 extern int is_vsmp_box(void);
63 static inline void native_apic_mem_write(u32 reg, u32 v)
65 *((volatile u32 *)(APIC_BASE + reg)) = v;
68 static inline void native_apic_mem_write_atomic(u32 reg, u32 v)
70 (void)xchg((u32 *)(APIC_BASE + reg), v);
73 static inline u32 native_apic_mem_read(u32 reg)
75 return *((volatile u32 *)(APIC_BASE + reg));
78 static inline void native_apic_msr_write(u32 reg, u32 v)
80 if (reg == APIC_DFR || reg == APIC_ID || reg == APIC_LDR ||
84 wrmsr(APIC_BASE_MSR + (reg >> 4), v, 0);
87 static inline u32 native_apic_msr_read(u32 reg)
94 rdmsr(APIC_BASE_MSR + (reg >> 4), low, high);
99 extern void apic_wait_icr_idle(void);
100 extern u32 safe_apic_wait_icr_idle(void);
101 extern void apic_icr_write(u32 low, u32 id);
105 u32 (*read)(u32 reg);
106 void (*write)(u32 reg, u32 v);
107 void (*write_atomic)(u32 reg, u32 v);
108 u64 (*icr_read)(void);
109 void (*icr_write)(u32 low, u32 high);
110 void (*wait_icr_idle)(void);
111 u32 (*safe_wait_icr_idle)(void);
114 extern struct apic_ops *apic_ops;
116 #define apic_read (apic_ops->read)
117 #define apic_write (apic_ops->write)
118 #define apic_write_atomic (apic_ops->write_atomic)
119 #define apic_icr_read (apic_ops->icr_read)
120 #define apic_icr_write (apic_ops->icr_write)
121 #define apic_wait_icr_idle (apic_ops->wait_icr_idle)
122 #define safe_apic_wait_icr_idle (apic_ops->safe_wait_icr_idle)
125 extern int get_physical_broadcast(void);
127 #ifdef CONFIG_X86_GOOD_APIC
128 # define FORCE_READ_AROUND_WRITE 0
129 # define apic_read_around(x)
130 # define apic_write_around(x, y) apic_write((x), (y))
132 # define FORCE_READ_AROUND_WRITE 1
133 # define apic_read_around(x) apic_read(x)
134 # define apic_write_around(x, y) apic_write_atomic((x), (y))
137 static inline void ack_APIC_irq(void)
140 * ack_APIC_irq() actually gets compiled as a single instruction:
141 * - a single rmw on Pentium/82489DX
142 * - a single write on P6+ cores (CONFIG_X86_GOOD_APIC)
146 /* Docs say use 0 for future compatibility */
148 apic_write_around(APIC_EOI, 0);
150 native_apic_mem_write(APIC_EOI, 0);
154 extern int lapic_get_maxlvt(void);
155 extern void clear_local_APIC(void);
156 extern void connect_bsp_APIC(void);
157 extern void disconnect_bsp_APIC(int virt_wire_setup);
158 extern void disable_local_APIC(void);
159 extern void lapic_shutdown(void);
160 extern int verify_local_APIC(void);
161 extern void cache_APIC_registers(void);
162 extern void sync_Arb_IDs(void);
163 extern void init_bsp_APIC(void);
164 extern void setup_local_APIC(void);
165 extern void end_local_APIC_setup(void);
166 extern void init_apic_mappings(void);
167 extern void setup_boot_APIC_clock(void);
168 extern void setup_secondary_APIC_clock(void);
169 extern int APIC_init_uniprocessor(void);
170 extern void enable_NMI_through_LVT0(void);
173 * On 32bit this is mach-xxx local
176 extern void early_init_lapic_mapping(void);
177 extern int apic_is_clustered_box(void);
179 static inline int apic_is_clustered_box(void)
185 extern u8 setup_APIC_eilvt_mce(u8 vector, u8 msg_type, u8 mask);
186 extern u8 setup_APIC_eilvt_ibs(u8 vector, u8 msg_type, u8 mask);
189 #else /* !CONFIG_X86_LOCAL_APIC */
190 static inline void lapic_shutdown(void) { }
191 #define local_apic_timer_c2_ok 1
192 static inline void init_apic_mappings(void) { }
194 #endif /* !CONFIG_X86_LOCAL_APIC */
196 #endif /* __ASM_APIC_H */