diff options
Diffstat (limited to 'arch/powerpc/kernel/idle_book3s.S')
| -rw-r--r-- | arch/powerpc/kernel/idle_book3s.S | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/idle_book3s.S b/arch/powerpc/kernel/idle_book3s.S index d32751994a62..22f249b6f58d 100644 --- a/arch/powerpc/kernel/idle_book3s.S +++ b/arch/powerpc/kernel/idle_book3s.S @@ -15,7 +15,9 @@ #include <asm/asm-offsets.h> #include <asm/ppc-opcode.h> #include <asm/cpuidle.h> +#include <asm/thread_info.h> /* TLF_NAPPING */ +#ifdef CONFIG_PPC_P7_NAP /* * Desired PSSCR in r3 * @@ -181,4 +183,22 @@ _GLOBAL(isa206_idle_insn_mayloss) bne 2f IDLE_STATE_ENTER_SEQ_NORET(PPC_SLEEP) 2: IDLE_STATE_ENTER_SEQ_NORET(PPC_WINKLE) +#endif +#ifdef CONFIG_PPC_970_NAP +_GLOBAL(power4_idle_nap) + LOAD_REG_IMMEDIATE(r7, MSR_KERNEL|MSR_EE|MSR_POW) + ld r9,PACA_THREAD_INFO(r13) + ld r8,TI_LOCAL_FLAGS(r9) + ori r8,r8,_TLF_NAPPING + std r8,TI_LOCAL_FLAGS(r9) + /* + * NAPPING bit is set, from this point onward power4_fixup_nap + * will cause exceptions to return to power4_idle_nap_return. + */ +1: sync + isync + mtmsrd r7 + isync + b 1b +#endif |