diff options
Diffstat (limited to 'arch/x86/include/asm/mach-default/smpboot_hooks.h')
-rw-r--r-- | arch/x86/include/asm/mach-default/smpboot_hooks.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/arch/x86/include/asm/mach-default/smpboot_hooks.h b/arch/x86/include/asm/mach-default/smpboot_hooks.h new file mode 100644 index 00000000000..dbab36d64d4 --- /dev/null +++ b/arch/x86/include/asm/mach-default/smpboot_hooks.h | |||
@@ -0,0 +1,59 @@ | |||
1 | /* two abstractions specific to kernel/smpboot.c, mainly to cater to visws | ||
2 | * which needs to alter them. */ | ||
3 | |||
4 | static inline void smpboot_clear_io_apic_irqs(void) | ||
5 | { | ||
6 | #ifdef CONFIG_X86_IO_APIC | ||
7 | io_apic_irqs = 0; | ||
8 | #endif | ||
9 | } | ||
10 | |||
11 | static inline void smpboot_setup_warm_reset_vector(unsigned long start_eip) | ||
12 | { | ||
13 | CMOS_WRITE(0xa, 0xf); | ||
14 | local_flush_tlb(); | ||
15 | pr_debug("1.\n"); | ||
16 | *((volatile unsigned short *) TRAMPOLINE_HIGH) = start_eip >> 4; | ||
17 | pr_debug("2.\n"); | ||
18 | *((volatile unsigned short *) TRAMPOLINE_LOW) = start_eip & 0xf; | ||
19 | pr_debug("3.\n"); | ||
20 | } | ||
21 | |||
22 | static inline void smpboot_restore_warm_reset_vector(void) | ||
23 | { | ||
24 | /* | ||
25 | * Install writable page 0 entry to set BIOS data area. | ||
26 | */ | ||
27 | local_flush_tlb(); | ||
28 | |||
29 | /* | ||
30 | * Paranoid: Set warm reset code and vector here back | ||
31 | * to default values. | ||
32 | */ | ||
33 | CMOS_WRITE(0, 0xf); | ||
34 | |||
35 | *((volatile long *) phys_to_virt(0x467)) = 0; | ||
36 | } | ||
37 | |||
38 | static inline void __init smpboot_setup_io_apic(void) | ||
39 | { | ||
40 | #ifdef CONFIG_X86_IO_APIC | ||
41 | /* | ||
42 | * Here we can be sure that there is an IO-APIC in the system. Let's | ||
43 | * go and set it up: | ||
44 | */ | ||
45 | if (!skip_ioapic_setup && nr_ioapics) | ||
46 | setup_IO_APIC(); | ||
47 | else { | ||
48 | nr_ioapics = 0; | ||
49 | localise_nmi_watchdog(); | ||
50 | } | ||
51 | #endif | ||
52 | } | ||
53 | |||
54 | static inline void smpboot_clear_io_apic(void) | ||
55 | { | ||
56 | #ifdef CONFIG_X86_IO_APIC | ||
57 | nr_ioapics = 0; | ||
58 | #endif | ||
59 | } | ||