From 61ce3ed57b40212a9ae79cebb44861a8c63df54a Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Tue, 2 Sep 2014 14:19:10 -0700 Subject: [PATCH] ARM: zynq: Remove invalidate cache for cpu die As there is no Power management unit on this board, it is not possible to power down a core, just WFI is allowed. There is no point to invalidate the cache and exit coherency. Signed-off-by: Daniel Lezcano Reviewed-and-tested-by: Soren Brinkmann Signed-off-by: Michal Simek --- arch/arm/mach-zynq/hotplug.c | 32 +------------------------------- 1 file changed, 1 insertion(+), 31 deletions(-) diff --git a/arch/arm/mach-zynq/hotplug.c b/arch/arm/mach-zynq/hotplug.c index 5052c70326e4..366f46c91365 100644 --- a/arch/arm/mach-zynq/hotplug.c +++ b/arch/arm/mach-zynq/hotplug.c @@ -10,35 +10,7 @@ * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ -#include -#include -#include - -#include -#include -#include "common.h" - -static inline void zynq_cpu_enter_lowpower(void) -{ - unsigned int v; - - flush_cache_all(); - asm volatile( - " mcr p15, 0, %1, c7, c5, 0\n" - " dsb\n" - /* - * Turn off coherency - */ - " mrc p15, 0, %0, c1, c0, 1\n" - " bic %0, %0, #0x40\n" - " mcr p15, 0, %0, c1, c0, 1\n" - " mrc p15, 0, %0, c1, c0, 0\n" - " bic %0, %0, %2\n" - " mcr p15, 0, %0, c1, c0, 0\n" - : "=&r" (v) - : "r" (0), "Ir" (CR_C) - : "cc"); -} +#include /* * platform-specific code to shutdown a CPU @@ -47,8 +19,6 @@ static inline void zynq_cpu_enter_lowpower(void) */ void zynq_platform_cpu_die(unsigned int cpu) { - zynq_cpu_enter_lowpower(); - /* * there is no power-control hardware on this platform, so all * we can do is put the core into WFI; this is safe as the calling -- 2.20.1