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ARM: provide common method to clear bits in CPU control register

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Several places open-code this manipulation, let's consolidate this.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King
2014-04-13 18:57:29 +01:00
parent 4585eaff63
commit b4b20ad881
4 changed files with 20 additions and 9 deletions
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arch/arm/mm/mmu.c
+4 -6
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@@ -125,6 +125,7 @@ static struct cachepolicy cache_policies[] __initdata = {
*/
static int __init early_cachepolicy(char *p)
{
unsigned long cr = get_cr();
int i;
for (i = 0; i < ARRAY_SIZE(cache_policies); i++) {
@@ -132,8 +133,7 @@ static int __init early_cachepolicy(char *p)
if (memcmp(p, cache_policies[i].policy, len) == 0) {
cachepolicy = i;
cr_alignment &= ~cache_policies[i].cr_mask;
cr_no_alignment &= ~cache_policies[i].cr_mask;
cr = __clear_cr(cache_policies[i].cr_mask);
break;
}
}
@@ -151,7 +151,7 @@ static int __init early_cachepolicy(char *p)
cachepolicy = CPOLICY_WRITEBACK;
}
flush_cache_all();
set_cr(cr_alignment);
set_cr(cr);
return 0;
}
early_param("cachepolicy", early_cachepolicy);
@@ -188,9 +188,7 @@ early_param("ecc", early_ecc);
static int __init noalign_setup(char *__unused)
{
cr_alignment &= ~CR_A;
cr_no_alignment &= ~CR_A;
set_cr(cr_alignment);
set_cr(__clear_cr(CR_A));
return 1;
}
__setup("noalign", noalign_setup);