| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * arch/sh/kernel/ubc.S |
| 3 | * |
| 4 | * Set of management routines for the User Break Controller (UBC) |
| 5 | * |
| 6 | * Copyright (C) 2002 Paul Mundt |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify it |
| 9 | * under the terms of the GNU General Public License as published by the |
| 10 | * Free Software Foundation; either version 2 of the License, or (at your |
| 11 | * option) any later version. |
| 12 | */ |
| 13 | #include <linux/linkage.h> |
| 14 | #include <asm/ubc.h> |
| 15 | |
| 16 | #define STBCR2 0xffc00010 |
| 17 | |
| 18 | ENTRY(ubc_sleep) |
| 19 | mov #0, r0 |
| 20 | |
| 21 | mov.l 1f, r1 ! Zero out UBC_BBRA .. |
| 22 | mov.w r0, @r1 |
| 23 | |
| 24 | mov.l 2f, r1 ! .. same for BBRB .. |
| 25 | mov.w r0, @r1 |
| 26 | |
| 27 | mov.l 3f, r1 ! .. and again for BRCR. |
| 28 | mov.w r0, @r1 |
| 29 | |
| 30 | mov.w @r1, r0 ! Dummy read BRCR |
| 31 | |
| 32 | mov.l 4f, r1 ! Set MSTP5 in STBCR2 |
| 33 | mov.b @r1, r0 |
| 34 | or #0x01, r0 |
| 35 | mov.b r0, @r1 |
| 36 | |
| 37 | mov.b @r1, r0 ! Two dummy reads .. |
| 38 | mov.b @r1, r0 |
| 39 | |
| 40 | rts |
| 41 | nop |
| 42 | |
| 43 | ENTRY(ubc_wakeup) |
| 44 | mov.l 4f, r1 ! Clear MSTP5 |
| 45 | mov.b @r1, r0 |
| 46 | and #0xfe, r0 |
| 47 | mov.b r0, @r1 |
| 48 | |
| 49 | mov.b @r1, r0 ! Two more dummy reads .. |
| 50 | mov.b @r1, r0 |
| 51 | |
| 52 | rts |
| 53 | nop |
| 54 | |
| 55 | 1: .long UBC_BBRA |
| 56 | 2: .long UBC_BBRB |
| 57 | 3: .long UBC_BRCR |
| 58 | 4: .long STBCR2 |
| 59 | |