openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

ARM: qcom: scm: Get cacheline size from CTR 

Instead of hardcoding the cacheline size as 32, get the cacheline size from
the CTR register.

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Kumar Gala <galak@codeaurora.org>
This commit is contained in:
Stephen Boyd 2014-08-04 18:31:44 -07:00 committed by Kumar Gala
parent f76c691657
commit 30cbb0c01b
1 changed files with 8 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
arch/arm/mach-qcom/scm.c
View File

@ -27,9 +27,6 @@
#include "scm.h"
/* Cache line size for msm8x60 */
#define CACHELINESIZE 32
#define SCM_ENOMEM -5
#define SCM_EOPNOTSUPP -4
#define SCM_EINVAL_ADDR -3
@ -214,13 +211,18 @@ static int __scm_call(const struct scm_command *cmd)
static void scm_inv_range(unsigned long start, unsigned long end)
{
start = round_down(start, CACHELINESIZE);
end = round_up(end, CACHELINESIZE);
u32 cacheline_size, ctr;
asm volatile("mrc p15, 0, %0, c0, c0, 1" : "=r" (ctr));
cacheline_size = 4 << ((ctr >> 16) & 0xf);
start = round_down(start, cacheline_size);
end = round_up(end, cacheline_size);
outer_inv_range(start, end);
while (start < end) {
asm ("mcr p15, 0, %0, c7, c6, 1" : : "r" (start)
: "memory");
start += CACHELINESIZE;
start += cacheline_size;
}
dsb();
isb();