Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-12-04 18:13:04 +00:00
Code Issues Packages Projects Releases Wiki Activity

ARM: EXYNOS: use v7_exit_coherency_flush macro for cache disabling

Browse Source 
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>
This commit is contained in:
Leela Krishna Amudala 2014-05-09 22:51:04 +09:00 committed by Kukjin Kim
parent b5783dcaed
commit 75ad2ab28f
1 changed files with 1 additions and 62 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

63
arch/arm/mach-exynos/hotplug.c
View File

@ -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);