Andriy Skulysh | 3aa770e | 2006-09-27 16:20:22 +0900 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2006 Andriy Skulysh <askulsyh@gmail.com> |
| 3 | * |
| 4 | * This file is subject to the terms and conditions of the GNU General Public |
| 5 | * License. See the file "COPYING" in the main directory of this archive |
| 6 | * for more details. |
| 7 | * |
| 8 | */ |
| 9 | |
| 10 | #include <linux/linkage.h> |
Paul Mundt | f15cbe6 | 2008-07-29 08:09:44 +0900 | [diff] [blame] | 11 | #include <cpu/mmu_context.h> |
Andriy Skulysh | 3aa770e | 2006-09-27 16:20:22 +0900 | [diff] [blame] | 12 | |
| 13 | #define k0 r0 |
| 14 | #define k1 r1 |
| 15 | #define k2 r2 |
| 16 | #define k3 r3 |
| 17 | #define k4 r4 |
| 18 | |
| 19 | /* |
| 20 | * Kernel mode register usage: |
| 21 | * k0 scratch |
| 22 | * k1 scratch |
| 23 | * k2 scratch (Exception code) |
| 24 | * k3 scratch (Return address) |
| 25 | * k4 scratch |
| 26 | * k5 reserved |
| 27 | * k6 Global Interrupt Mask (0--15 << 4) |
| 28 | * k7 CURRENT_THREAD_INFO (pointer to current thread info) |
| 29 | */ |
| 30 | |
| 31 | ENTRY(wakeup_start) |
| 32 | ! clear STBY bit |
| 33 | mov #-126, k2 |
| 34 | and #127, k0 |
| 35 | mov.b k0, @k2 |
| 36 | ! enable refresh |
| 37 | mov.l 5f, k1 |
| 38 | mov.w 6f, k0 |
| 39 | mov.w k0, @k1 |
| 40 | ! jump to handler |
| 41 | mov.l 2f, k2 |
| 42 | mov.l 3f, k3 |
| 43 | mov.l @k2, k2 |
| 44 | |
| 45 | mov.l 4f, k1 |
| 46 | jmp @k1 |
| 47 | nop |
| 48 | |
| 49 | .align 2 |
| 50 | 1: .long EXPEVT |
| 51 | 2: .long INTEVT |
| 52 | 3: .long ret_from_irq |
| 53 | 4: .long handle_exception |
| 54 | 5: .long 0xffffff68 |
| 55 | 6: .word 0x0524 |
| 56 | |
| 57 | ENTRY(wakeup_end) |
| 58 | nop |