lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Thu, 12 Feb 2015 10:51:26 +0800 From: Wenyou Yang <wenyou.yang@...el.com> To: <nicolas.ferre@...el.com>, <linux@...im.org.za>, <linux@....linux.org.uk> CC: <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>, <sylvain.rochet@...secur.com>, <alexandre.belloni@...e-electrons.com>, <patrice.vilchez@...el.com>, <sergei.shtylyov@...entembedded.com>, <mark.rutland@....com>, <lorenzo.pieralisi@....com>, <wenyou.yang@...el.com> Subject: [PATCH 1/3] pm: at91: pm_suspend: add the WFI instruction support for ARMv7 Add the WFI instruction to make the cpu to the idle state. In the meanwhile, disable the processor's clock. Signed-off-by: Wenyou Yang <wenyou.yang@...el.com> --- arch/arm/mach-at91/pm_suspend.S | 20 +++++++++++++++++++- 1 file changed, 19 insertions(+), 1 deletion(-) diff --git a/arch/arm/mach-at91/pm_suspend.S b/arch/arm/mach-at91/pm_suspend.S index bebe3de..1c7256a 100644 --- a/arch/arm/mach-at91/pm_suspend.S +++ b/arch/arm/mach-at91/pm_suspend.S @@ -51,6 +51,24 @@ tmp2 .req r5 beq 1b .endm +/* + * Put the processor to enter the idle state + */ + .macro at91_cpu_idle + +#if defined(CONFIG_CPU_V7) + mov tmp1, #AT91_PMC_PCK + str tmp1, [pmc, #AT91_PMC_SCDR] + + dsb + + wfi @ Wait For Interrupt +#else + mcr p15, 0, tmp1, c7, c0, 4 +#endif + + .endm + .text /* @@ -120,7 +138,7 @@ skip_disable_main_clock: ldr pmc, .pmc_base /* Wait for interrupt */ - mcr p15, 0, tmp1, c7, c0, 4 + at91_cpu_idle ldr r0, .pm_mode tst r0, #AT91_PM_SLOW_CLOCK -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists