tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef __ASM_APIC_H
2#define __ASM_APIC_H
3
4#include <linux/config.h>
5#include <linux/pm.h>
6#include <asm/fixmap.h>
7#include <asm/apicdef.h>
8#include <asm/processor.h>
9#include <asm/system.h>
10
11#define Dprintk(x...)
12
13/*
14 * Debugging macros
15 */
16#define APIC_QUIET 0
17#define APIC_VERBOSE 1
18#define APIC_DEBUG 2
19
20extern int enable_local_apic;
21extern int apic_verbosity;
22
23static inline void lapic_disable(void)
24{
25 enable_local_apic = -1;
26 clear_bit(X86_FEATURE_APIC, boot_cpu_data.x86_capability);
27}
28
29static inline void lapic_enable(void)
30{
31 enable_local_apic = 1;
32}
33
34/*
35 * Define the default level of output to be very little
36 * This can be turned up by using apic=verbose for more
37 * information and apic=debug for _lots_ of information.
38 * apic_verbosity is defined in apic.c
39 */
40#define apic_printk(v, s, a...) do { \
41 if ((v) <= apic_verbosity) \
42 printk(s, ##a); \
43 } while (0)
44
45
46#ifdef CONFIG_X86_LOCAL_APIC
47
48/*
49 * Basic functions accessing APICs.
50 */
51
52static __inline void apic_write(unsigned long reg, unsigned long v)
53{
54 *((volatile unsigned long *)(APIC_BASE+reg)) = v;
55}
56
57static __inline void apic_write_atomic(unsigned long reg, unsigned long v)
58{
59 xchg((volatile unsigned long *)(APIC_BASE+reg), v);
60}
61
62static __inline unsigned long apic_read(unsigned long reg)
63{
64 return *((volatile unsigned long *)(APIC_BASE+reg));
65}
66
67static __inline__ void apic_wait_icr_idle(void)
68{
69 while ( apic_read( APIC_ICR ) & APIC_ICR_BUSY )
70 cpu_relax();
71}
72
73int get_physical_broadcast(void);
74
75#ifdef CONFIG_X86_GOOD_APIC
76# define FORCE_READ_AROUND_WRITE 0
77# define apic_read_around(x)
78# define apic_write_around(x,y) apic_write((x),(y))
79#else
80# define FORCE_READ_AROUND_WRITE 1
81# define apic_read_around(x) apic_read(x)
82# define apic_write_around(x,y) apic_write_atomic((x),(y))
83#endif
84
85static inline void ack_APIC_irq(void)
86{
87 /*
88 * ack_APIC_irq() actually gets compiled as a single instruction:
89 * - a single rmw on Pentium/82489DX
90 * - a single write on P6+ cores (CONFIG_X86_GOOD_APIC)
91 * ... yummie.
92 */
93
94 /* Docs say use 0 for future compatibility */
95 apic_write_around(APIC_EOI, 0);
96}
97
98extern void (*wait_timer_tick)(void);
99
100extern int get_maxlvt(void);
101extern void clear_local_APIC(void);
102extern void connect_bsp_APIC (void);
103extern void disconnect_bsp_APIC (int virt_wire_setup);
104extern void disable_local_APIC (void);
105extern void lapic_shutdown (void);
106extern int verify_local_APIC (void);
107extern void cache_APIC_registers (void);
108extern void sync_Arb_IDs (void);
109extern void init_bsp_APIC (void);
110extern void setup_local_APIC (void);
111extern void init_apic_mappings (void);
112extern void smp_local_timer_interrupt (struct pt_regs * regs);
113extern void setup_boot_APIC_clock (void);
114extern void setup_secondary_APIC_clock (void);
115extern void setup_apic_nmi_watchdog (void);
116extern int reserve_lapic_nmi(void);
117extern void release_lapic_nmi(void);
118extern void disable_timer_nmi_watchdog(void);
119extern void enable_timer_nmi_watchdog(void);
120extern void nmi_watchdog_tick (struct pt_regs * regs);
121extern int APIC_init_uniprocessor (void);
122extern void disable_APIC_timer(void);
123extern void enable_APIC_timer(void);
124
125extern void enable_NMI_through_LVT0 (void * dummy);
126
127extern unsigned int nmi_watchdog;
128#define NMI_NONE 0
129#define NMI_IO_APIC 1
130#define NMI_LOCAL_APIC 2
131#define NMI_INVALID 3
132
133extern int disable_timer_pin_1;
134
135void smp_send_timer_broadcast_ipi(struct pt_regs *regs);
136void switch_APIC_timer_to_ipi(void *cpumask);
137void switch_ipi_to_APIC_timer(void *cpumask);
138#define ARCH_APICTIMER_STOPS_ON_C3 1
139
140extern int timer_over_8254;
141
142#else /* !CONFIG_X86_LOCAL_APIC */
143static inline void lapic_shutdown(void) { }
144
145#endif /* !CONFIG_X86_LOCAL_APIC */
146
147#endif /* __ASM_APIC_H */