diff options
| author | Daniel Lezcano <daniel.lezcano@linaro.org> | 2014-09-02 14:19:10 -0700 |
|---|---|---|
| committer | Michal Simek <michal.simek@xilinx.com> | 2014-09-16 12:55:08 +0200 |
| commit | 61ce3ed57b40212a9ae79cebb44861a8c63df54a (patch) | |
| tree | 29ee1f3564f83d2d18aece0572a525dfa1aa1f3b /arch/arm | |
| parent | 0beb2bd36f6216f455363f47f8ba32fdf26667fb (diff) | |
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 <daniel.lezcano@linaro.org>
Reviewed-and-tested-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-zynq/hotplug.c | 32 |
1 files changed, 1 insertions, 31 deletions
diff --git a/arch/arm/mach-zynq/hotplug.c b/arch/arm/mach-zynq/hotplug.c index 5052c70326e..366f46c9136 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 <linux/kernel.h> -#include <linux/errno.h> -#include <linux/smp.h> - -#include <asm/cacheflush.h> -#include <asm/cp15.h> -#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 <asm/proc-fns.h> /* * 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 |