| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | io_apic_irqs = 0; |
| 7 | } |
| 8 | |
| 9 | static inline void smpboot_setup_warm_reset_vector(unsigned long start_eip) |
| 10 | { |
| 11 | CMOS_WRITE(0xa, 0xf); |
| 12 | local_flush_tlb(); |
| 13 | Dprintk("1.\n"); |
| 14 | *((volatile unsigned short *) TRAMPOLINE_HIGH) = start_eip >> 4; |
| 15 | Dprintk("2.\n"); |
| 16 | *((volatile unsigned short *) TRAMPOLINE_LOW) = start_eip & 0xf; |
| 17 | Dprintk("3.\n"); |
| 18 | } |
| 19 | |
| 20 | static inline void smpboot_restore_warm_reset_vector(void) |
| 21 | { |
| 22 | /* |
| 23 | * Install writable page 0 entry to set BIOS data area. |
| 24 | */ |
| 25 | local_flush_tlb(); |
| 26 | |
| 27 | /* |
| 28 | * Paranoid: Set warm reset code and vector here back |
| 29 | * to default values. |
| 30 | */ |
| 31 | CMOS_WRITE(0, 0xf); |
| 32 | |
| 33 | *((volatile long *) phys_to_virt(0x467)) = 0; |
| 34 | } |
| 35 | |
| 36 | static inline void smpboot_setup_io_apic(void) |
| 37 | { |
| 38 | /* |
| 39 | * Here we can be sure that there is an IO-APIC in the system. Let's |
| 40 | * go and set it up: |
| 41 | */ |
| 42 | if (!skip_ioapic_setup && nr_ioapics) |
| 43 | setup_IO_APIC(); |
| 44 | } |