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powerpc/85xx: add DOZE/NAP support for e500 core

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The e500 core enter DOZE/NAP power-saving modes when the core go to
cpu_idle routine.

The power management default running mode is DOZE, If the user

echo 1 > /proc/sys/kernel/powersave-nap

the system will change to NAP running mode.

Signed-off-by: Dave Liu <daveliu@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Kumar Gala
2008-06-18 16:26:52 -05:00
parent 3dfa877367
commit fc4033b2f8
11 changed files with 152 additions and 14 deletions
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8
arch/powerpc/kernel/entry_32.S
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@@ -176,14 +176,14 @@ transfer_to_handler:
cmplw r1,r9 /* if r1 <= ksp_limit */
ble- stack_ovf /* then the kernel stack overflowed */
5:
#ifdef CONFIG_6xx
#if defined(CONFIG_6xx) || defined(CONFIG_E500)
rlwinm r9,r1,0,0,31-THREAD_SHIFT
tophys(r9,r9) /* check local flags */
lwz r12,TI_LOCAL_FLAGS(r9)
mtcrf 0x01,r12
bt- 31-TLF_NAPPING,4f
bt- 31-TLF_SLEEPING,7f
#endif /* CONFIG_6xx */
#endif /* CONFIG_6xx || CONFIG_E500 */
.globl transfer_to_handler_cont
transfer_to_handler_cont:
3:
@@ -196,10 +196,10 @@ transfer_to_handler_cont:
SYNC
RFI /* jump to handler, enable MMU */
#ifdef CONFIG_6xx
#if defined (CONFIG_6xx) || defined(CONFIG_E500)
4: rlwinm r12,r12,0,~_TLF_NAPPING
stw r12,TI_LOCAL_FLAGS(r9)
b power_save_6xx_restore
b power_save_ppc32_restore
7: rlwinm r12,r12,0,~_TLF_SLEEPING
stw r12,TI_LOCAL_FLAGS(r9)