File: /usr/include/asm/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 1
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     extern __inline void apic_write(unsigned long reg, unsigned long v)
24     {
25     	*((volatile unsigned long *)(APIC_BASE+reg)) = v;
26     }
27     
28     extern __inline void apic_write_atomic(unsigned long reg, unsigned long v)
29     {
30     	xchg((volatile unsigned long *)(APIC_BASE+reg), v);
31     }
32     
33     extern __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     extern 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 connect_bsp_APIC (void);
68     extern void disconnect_bsp_APIC (void);
69     extern void disable_local_APIC (void);
70     extern int verify_local_APIC (void);
71     extern void cache_APIC_registers (void);
72     extern void sync_Arb_IDs (void);
73     extern void init_bsp_APIC (void);
74     extern void setup_local_APIC (void);
75     extern void init_apic_mappings (void);
76     extern void smp_local_timer_interrupt (struct pt_regs * regs);
77     extern void setup_APIC_clocks (void);
78     extern void setup_apic_nmi_watchdog (void);
79     extern inline void nmi_watchdog_tick (struct pt_regs * regs);
80     extern int APIC_init_uniprocessor (void);
81     
82     extern struct pm_dev *apic_pm_register(pm_dev_t, unsigned long, pm_callback);
83     extern void apic_pm_unregister(struct pm_dev*);
84     
85     extern unsigned int apic_timer_irqs [NR_CPUS];
86     extern int check_nmi_watchdog (void);
87     
88     extern unsigned int nmi_watchdog;
89     #define NMI_NONE	0
90     #define NMI_IO_APIC	1
91     #define NMI_LOCAL_APIC	2
92     #define NMI_INVALID	3
93     
94     #endif /* CONFIG_X86_LOCAL_APIC */
95     
96     #endif /* __ASM_APIC_H */
97