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sh: Account for cache aliases in flush_icache_range()

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The icache may also contain aliases so we must account for them just
like we do when manipulating the dcache. We usually get away with
aliases in the icache because the instructions that are read from memory
are read-only, i.e. they never change. However, the place where this
bites us is when the code has been modified.

Signed-off-by: Matt Fleming <matt@console-pimps.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Matt Fleming 2009-11-05 23:14:39 +00:00 committed by Paul Mundt
parent 421b541110
commit a9d244a2ff
1 changed files with 4 additions and 1 deletions
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5
arch/sh/mm/cache-sh4.c
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@ -72,6 +72,7 @@ static void __uses_jump_to_uncached sh4_flush_icache_range(void *args)
for (v = start; v < end; v += L1_CACHE_BYTES) {
unsigned long icacheaddr;
int j, n;
__ocbwb(v);
@ -79,8 +80,10 @@ static void __uses_jump_to_uncached sh4_flush_icache_range(void *args)
cpu_data->icache.entry_mask);
/* Clear i-cache line valid-bit */
n = boot_cpu_data.icache.n_aliases;
for (i = 0; i < cpu_data->icache.ways; i++) {
__raw_writel(0, icacheaddr);
for (j = 0; j < n; j++)
__raw_writel(0, icacheaddr + (j * PAGE_SIZE));
icacheaddr += cpu_data->icache.way_incr;
}
}