ia64/xen-unstable

view old/xenolinux-2.4.16-sparse/include/asm-xeno/apic.h @ 235:d7d0a23b2e07

bitkeeper revision 1.93 (3e5a4e6bkPheUp3x1uufN2MS3LAB7A)

Latest and Greatest version of XenoLinux based on the Linux-2.4.21-pre4
kernel.
author iap10@labyrinth.cl.cam.ac.uk
date Mon Feb 24 16:55:07 2003 +0000 (2003-02-24)
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1 #ifndef __ASM_APIC_H
2 #define __ASM_APIC_H
4 #include <linux/config.h>
5 #include <linux/pm.h>
6 #include <asm/apicdef.h>
7 #include <asm/system.h>
9 #ifdef CONFIG_X86_LOCAL_APIC
11 #define APIC_DEBUG 0
13 #if APIC_DEBUG
14 #define Dprintk(x...) printk(x)
15 #else
16 #define Dprintk(x...)
17 #endif
19 /*
20 * Basic functions accessing APICs.
21 */
23 static __inline void apic_write(unsigned long reg, unsigned long v)
24 {
25 *((volatile unsigned long *)(APIC_BASE+reg)) = v;
26 }
28 static __inline void apic_write_atomic(unsigned long reg, unsigned long v)
29 {
30 xchg((volatile unsigned long *)(APIC_BASE+reg), v);
31 }
33 static __inline unsigned long apic_read(unsigned long reg)
34 {
35 return *((volatile unsigned long *)(APIC_BASE+reg));
36 }
38 static __inline__ void apic_wait_icr_idle(void)
39 {
40 do { } while ( apic_read( APIC_ICR ) & APIC_ICR_BUSY );
41 }
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
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 */
62 /* Docs say use 0 for future compatibility */
63 apic_write_around(APIC_EOI, 0);
64 }
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 inline void nmi_watchdog_tick (struct pt_regs * regs);
81 extern int APIC_init_uniprocessor (void);
83 extern struct pm_dev *apic_pm_register(pm_dev_t, unsigned long, pm_callback);
84 extern void apic_pm_unregister(struct pm_dev*);
86 extern unsigned int apic_timer_irqs [NR_CPUS];
87 extern int check_nmi_watchdog (void);
89 extern unsigned int nmi_watchdog;
90 #define NMI_NONE 0
91 #define NMI_IO_APIC 1
92 #define NMI_LOCAL_APIC 2
93 #define NMI_INVALID 3
95 #endif /* CONFIG_X86_LOCAL_APIC */
97 #endif /* __ASM_APIC_H */