projects / mirror_ubuntu-zesty-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 1199919b OJ |
1 | /* |
| 2 | * Copyright (C) 2006-2007 PA Semi, Inc | |
| 3 | * | |
| 4 | * Maintained by: Olof Johansson <olof@lixom.net> | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify | |
| 7 | * it under the terms of the GNU General Public License version 2 as | |
| 8 | * published by the Free Software Foundation. | |
| 9 | * | |
| 10 | * This program is distributed in the hope that it will be useful, | |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 | * GNU General Public License for more details. | |
| 14 | * | |
| 15 | * You should have received a copy of the GNU General Public License | |
| 16 | * along with this program; if not, write to the Free Software | |
| 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | * | |
| 19 | */ | |
| 20 | ||
| 21 | #include <asm/processor.h> | |
| 22 | #include <asm/page.h> | |
| 23 | #include <asm/ppc_asm.h> | |
| 24 | #include <asm/cputable.h> | |
| 25 | #include <asm/cache.h> | |
| 26 | #include <asm/thread_info.h> | |
| 27 | #include <asm/asm-offsets.h> | |
| 28 | ||
| 29 | /* Power savings opcodes since not all binutils have them at this time */ | |
| 30 | #define DOZE .long 0x4c000324 | |
| 31 | #define NAP .long 0x4c000364 | |
| 32 | #define SLEEP .long 0x4c0003a4 | |
| 33 | #define RVW .long 0x4c0003e4 | |
| 34 | ||
| 35 | /* Common sequence to do before going to any of the | |
| 36 | * powersavings modes. | |
| 37 | */ | |
| 38 | ||
| 39 | #define PRE_SLEEP_SEQUENCE \ | |
| 40 | std r3,8(r1); \ | |
| 41 | ptesync ; \ | |
| 42 | ld r3,8(r1); \ | |
| 43 | 1: cmpd r3,r3; \ | |
| 44 | bne 1b | |
| 45 | ||
| 46 | _doze: | |
| 47 | PRE_SLEEP_SEQUENCE | |
| 48 | DOZE | |
| 49 | b . | |
| 50 | ||
| 51 | ||
| 52 | _GLOBAL(idle_spin) | |
| 53 | blr | |
| 54 | ||
| 55 | _GLOBAL(idle_doze) | |
| 56 | LOAD_REG_ADDR(r3, _doze) | |
| 57 | b sleep_common | |
| 58 | ||
| 59 | /* Add more modes here later */ | |
| 60 | ||
| 61 | sleep_common: | |
| 62 | mflr r0 | |
| 63 | std r0, 16(r1) | |
| 64 | stdu r1,-64(r1) | |
| 8b32bc03 OJ |
65 | #ifdef CONFIG_PPC_PASEMI_CPUFREQ |
| 66 | std r3, 48(r1) | |
| 1199919b | 67 | |
| 8b32bc03 | 68 | /* Only do power savings when in astate 0 */ |
| b1576fec | 69 | bl check_astate |
| 8b32bc03 OJ |
70 | cmpwi r3,0 |
| 71 | bne 1f | |
| 72 | ||
| 73 | ld r3, 48(r1) | |
| 74 | #endif | |
| 1199919b OJ |
75 | LOAD_REG_IMMEDIATE(r6,MSR_DR|MSR_IR|MSR_ME|MSR_EE) |
| 76 | mfmsr r4 | |
| 77 | andc r5,r4,r6 | |
| 78 | mtmsrd r5,0 | |
| 79 | ||
| 80 | mtctr r3 | |
| 81 | bctrl | |
| 82 | ||
| 83 | mtmsrd r4,0 | |
| 84 | ||
| 8b32bc03 | 85 | 1: addi r1,r1,64 |
| 1199919b OJ |
86 | ld r0,16(r1) |
| 87 | mtlr r0 | |
| 88 | blr | |
| 89 |