armv7: add new dcache and MMU setup functions

This adds new MMU setup code. Most notably, this version uses
cbmem_add() to determine the translation table base address, which
in turn is necessary to ensure payloads which wipe memory can tell
which regions to wipe out.

TODOs:
- Finish cleaning up references to old cache/MMU stuff
- Add L2 setup (from exynos_cache.c)
- Set up ranges dynamically rather than in ramstage's main().

Change-Id: Iba5295a801e8058a3694e4ec5b94bbe9a69d3ee6
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: http://review.coreboot.org/2877
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/src/arch/armv7/bootblock_simple.c b/src/arch/armv7/bootblock_simple.c
index ad25b41316..f6134f75fb 100644
--- a/src/arch/armv7/bootblock_simple.c
+++ b/src/arch/armv7/bootblock_simple.c
@@ -53,12 +53,14 @@ void main(void)
 	armv7_invalidate_caches();
 
 	/*
-	 * Re-enable caches and branch prediction. MMU will be set up later.
+	 * Re-enable icache and branch prediction. MMU and dcache will be
+	 * set up later.
+	 *
 	 * Note: If booting from USB, we need to disable branch prediction
 	 * before copying from USB into RAM (FIXME: why?)
 	 */
 	sctlr = read_sctlr();
-	sctlr |= SCTLR_C | SCTLR_Z | SCTLR_I;
+	sctlr |= SCTLR_Z | SCTLR_I;
 	write_sctlr(sctlr);
 
 	if (boot_cpu()) {