diff options
Diffstat (limited to 'arch/ppc/kernel/idle_power4.S')
| -rw-r--r-- | arch/ppc/kernel/idle_power4.S | 91 |
1 files changed, 0 insertions, 91 deletions
diff --git a/arch/ppc/kernel/idle_power4.S b/arch/ppc/kernel/idle_power4.S deleted file mode 100644 index cc0d535365cd..000000000000 --- a/arch/ppc/kernel/idle_power4.S +++ /dev/null | |||
| @@ -1,91 +0,0 @@ | |||
| 1 | /* | ||
| 2 | * This file contains the power_save function for 6xx & 7xxx CPUs | ||
| 3 | * rewritten in assembler | ||
| 4 | * | ||
| 5 | * Warning ! This code assumes that if your machine has a 750fx | ||
| 6 | * it will have PLL 1 set to low speed mode (used during NAP/DOZE). | ||
| 7 | * if this is not the case some additional changes will have to | ||
| 8 | * be done to check a runtime var (a bit like powersave-nap) | ||
| 9 | * | ||
| 10 | * This program is free software; you can redistribute it and/or | ||
| 11 | * modify it under the terms of the GNU General Public License | ||
| 12 | * as published by the Free Software Foundation; either version | ||
| 13 | * 2 of the License, or (at your option) any later version. | ||
| 14 | */ | ||
| 15 | |||
| 16 | #include <linux/config.h> | ||
| 17 | #include <linux/threads.h> | ||
| 18 | #include <asm/processor.h> | ||
| 19 | #include <asm/page.h> | ||
| 20 | #include <asm/cputable.h> | ||
| 21 | #include <asm/thread_info.h> | ||
| 22 | #include <asm/ppc_asm.h> | ||
| 23 | #include <asm/asm-offsets.h> | ||
| 24 | |||
| 25 | #undef DEBUG | ||
| 26 | |||
| 27 | .text | ||
| 28 | |||
| 29 | /* | ||
| 30 | * Init idle, called at early CPU setup time from head.S for each CPU | ||
| 31 | * So nothing for now. Called with r24 containing CPU number and r3 | ||
| 32 | * reloc offset | ||
| 33 | */ | ||
| 34 | .globl init_idle_power4 | ||
| 35 | init_idle_power4: | ||
| 36 | blr | ||
| 37 | |||
| 38 | /* | ||
| 39 | * Here is the power_save_6xx function. This could eventually be | ||
| 40 | * split into several functions & changing the function pointer | ||
| 41 | * depending on the various features. | ||
| 42 | */ | ||
| 43 | .globl power4_idle | ||
| 44 | power4_idle: | ||
| 45 | BEGIN_FTR_SECTION | ||
| 46 | blr | ||
| 47 | END_FTR_SECTION_IFCLR(CPU_FTR_CAN_NAP) | ||
| 48 | /* We must dynamically check for the NAP feature as it | ||
| 49 | * can be cleared by CPU init after the fixups are done | ||
| 50 | */ | ||
| 51 | lis r4,cur_cpu_spec@ha | ||
| 52 | lwz r4,cur_cpu_spec@l(r4) | ||
| 53 | lwz r4,CPU_SPEC_FEATURES(r4) | ||
| 54 | andi. r0,r4,CPU_FTR_CAN_NAP | ||
| 55 | beqlr | ||
| 56 | /* Now check if user or arch enabled NAP mode */ | ||
| 57 | lis r4,powersave_nap@ha | ||
| 58 | lwz r4,powersave_nap@l(r4) | ||
| 59 | cmpwi 0,r4,0 | ||
| 60 | beqlr | ||
| 61 | |||
| 62 | /* Clear MSR:EE */ | ||
| 63 | mfmsr r7 | ||
| 64 | rlwinm r0,r7,0,17,15 | ||
| 65 | mtmsr r0 | ||
| 66 | |||
| 67 | /* Check current_thread_info()->flags */ | ||
| 68 | rlwinm r4,r1,0,0,18 | ||
| 69 | lwz r4,TI_FLAGS(r4) | ||
| 70 | andi. r0,r4,_TIF_NEED_RESCHED | ||
| 71 | beq 1f | ||
| 72 | mtmsr r7 /* out of line this ? */ | ||
| 73 | blr | ||
| 74 | 1: | ||
| 75 | /* Go to NAP now */ | ||
| 76 | BEGIN_FTR_SECTION | ||
| 77 | DSSALL | ||
| 78 | sync | ||
| 79 | END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC) | ||
| 80 | ori r7,r7,MSR_EE /* Could be ommited (already set) */ | ||
| 81 | oris r7,r7,MSR_POW@h | ||
| 82 | sync | ||
| 83 | isync | ||
| 84 | mtmsr r7 | ||
| 85 | isync | ||
| 86 | sync | ||
| 87 | blr | ||
| 88 | |||
| 89 | .globl powersave_nap | ||
| 90 | powersave_nap: | ||
| 91 | .long 0 | ||