diff options
| author | David Hendricks <dhendrix@chromium.org> | 2013-03-26 21:39:03 -0700 |
|---|---|---|
| committer | David Hendricks <dhendrix@chromium.org> | 2013-03-28 22:52:20 +0100 |
| commit | dbc11e2f766ab520fe2ccb61fdfed69b89e9d623 (patch) | |
| tree | 47f657dbf63692b5defd254de8884b685a1e0f6b /src/arch | |
| parent | 19f3092b5297b2f6e128a97698176ed1173be909 (diff) | |
armv7: clean+invalidate all cache levels when disabling MMU
This iterates thru all cache levels and cleans + invalidates all
data and unified caches before disabling dcache and MMU.
Change-Id: I8a671b4c90d7b88b8d0a95947bfa17f912cebaa2
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: http://review.coreboot.org/2930
Reviewed-by: Gabe Black <gabe.black@gmail.com>
Tested-by: build bot (Jenkins)
Diffstat (limited to 'src/arch')
| -rw-r--r-- | src/arch/armv7/lib/cache.c | 33 |
1 files changed, 30 insertions, 3 deletions
diff --git a/src/arch/armv7/lib/cache.c b/src/arch/armv7/lib/cache.c index de772a12b5..7bb337dd41 100644 --- a/src/arch/armv7/lib/cache.c +++ b/src/arch/armv7/lib/cache.c @@ -209,13 +209,40 @@ void dcache_clean_invalidate_by_mva(unsigned long addr, unsigned long len) dcache_op_mva(addr, len, OP_DCCIMVAC); } - void dcache_mmu_disable(void) { - uint32_t sctlr; + uint32_t sctlr, clidr; + int level; + + clidr = read_clidr(); + for (level = 0; level < 7; level++) { + unsigned int ctype = (clidr >> (level * 3)) & 0x7; + uint32_t csselr; + + switch(ctype) { + case 0x0: + /* no cache */ + break; + case 0x2: + case 0x4: + /* dcache only or unified cache */ + csselr = level << 1; + write_csselr(csselr); + dcache_clean_invalidate_all(); + break; + case 0x3: + /* separate icache and dcache */ + csselr = level << 1; + write_csselr(csselr); + dcache_clean_invalidate_all(); + break; + default: + /* reserved */ + break; + } + } sctlr = read_sctlr(); - dcache_clean_invalidate_all(); sctlr &= ~(SCTLR_C | SCTLR_M); write_sctlr(sctlr); } |