ARM: EXYNOS: use v7_exit_coherency_flush macro for cache disabling

A common macro v7_exit_coherency_flush available which does the below
tasks in the seqeunce.
-clearing C bit
-clearing L1 cache
-exit SMP
-instruction and data synchronization

So removing the local functions which does the same thing and use the
macro instead.

Signed-off-by: Leela Krishna Amudala <leela.krishna@linaro.org>
Acked-by: Nicolas Pitre <nico@linaro.org>
[cw00.choi@samsung.com: tested on exynos3250 based board]
Tested-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

diff --git a/arch/arm/mach-exynos/hotplug.c b/arch/arm/mach-exynos/hotplug.c
index 5eead53..9ca692d 100644 (file)
--- a/arch/arm/mach-exynos/hotplug.c
+++ b/arch/arm/mach-exynos/hotplug.c
@@ -24,56 +24,6 @@
 #include "common.h"
 #include "regs-pmu.h"
 
-static inline void cpu_enter_lowpower_a9(void)
-{
-       unsigned int v;
-
-       asm volatile(
-       "       mcr     p15, 0, %1, c7, c5, 0\n"
-       "       mcr     p15, 0, %1, c7, c10, 4\n"
-       /*
-        * Turn off coherency
-        */
-       "       mrc     p15, 0, %0, c1, c0, 1\n"
-       "       bic     %0, %0, %3\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), "Ir" (0x40)
-         : "cc");
-}
-
-static inline void cpu_enter_lowpower_a15(void)
-{
-       unsigned int v;
-
-       asm volatile(
-       "       mrc     p15, 0, %0, c1, c0, 0\n"
-       "       bic     %0, %0, %1\n"
-       "       mcr     p15, 0, %0, c1, c0, 0\n"
-         : "=&r" (v)
-         : "Ir" (CR_C)
-         : "cc");
-
-       flush_cache_louis();
-
-       asm volatile(
-       /*
-       * Turn off coherency
-       */
-       "       mrc     p15, 0, %0, c1, c0, 1\n"
-       "       bic     %0, %0, %1\n"
-       "       mcr     p15, 0, %0, c1, c0, 1\n"
-       : "=&r" (v)
-       : "Ir" (0x40)
-       : "cc");
-
-       isb();
-       dsb();
-}
-
 static inline void cpu_leave_lowpower(void)
 {
        unsigned int v;
@@ -132,19 +82,8 @@ static inline void platform_do_lowpower(unsigned int cpu, int *spurious)
 void __ref exynos_cpu_die(unsigned int cpu)
 {
        int spurious = 0;
-       int primary_part = 0;
 
-       /*
-        * we're ready for shutdown now, so do it.
-        * Exynos4 is A9 based while Exynos5 is A15; check the CPU part
-        * number by reading the Main ID register and then perform the
-        * appropriate sequence for entering low power.
-        */
-       asm("mrc p15, 0, %0, c0, c0, 0" : "=r"(primary_part) : : "cc");
-       if ((primary_part & 0xfff0) == 0xc0f0)
-               cpu_enter_lowpower_a15();
-       else
-               cpu_enter_lowpower_a9();
+       v7_exit_coherency_flush(louis);
 
        platform_do_lowpower(cpu, &spurious);