armv8: Add mmu support

Add support for initializing and enabling mmu for armv8. Using 64KiB granule and
33 bits per VA, thus total VA address space is 6GiB. PA Range is 64GiB. Makes
use of memrange library to get a list of all the mmap regions from the SoC to
initialize XLAT table.
Currently, all calculations in mmu.h are based on the assumptions that max 33
bits are used in VA and granule size is 64KiB. Changes in these assumptions will
have to reflect in the dependent calculations as well.

BUG=chrome-os-partner:30688
BRANCH=None
TEST=Compiles rush successfully and boots until "payload not found". Goes past
all the earlier alignment errors.

Original-Change-Id: Iac1df15f0b81dcf64484a56b94f51357bcd67cc2
Original-Signed-off-by: Furquan Shaikh <furquan@google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/208761
Original-Tested-by: Furquan Shaikh <furquan@chromium.org>
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Original-Commit-Queue: Furquan Shaikh <furquan@chromium.org>
(cherry picked from commit 6fe96360c03342115f849074f9e45a2c4e210705)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>

Change-Id: I5360a3be95f198bd0b4f79b62f31228cc7a9c285
Reviewed-on: http://review.coreboot.org/8646
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins)

1 files changed, 1 insertions, 0 deletions

diff --git a/src/arch/arm64/armv8/Makefile.inc b/src/arch/arm64/armv8/Makefile.inc
index ca4562b1a8..4cbb6e90c0 100644
--- a/src/arch/arm64/armv8/Makefile.inc
+++ b/src/arch/arm64/armv8/Makefile.inc
@@ -69,6 +69,7 @@ ramstage-y += cache.c
 ramstage-y += cpu.S
 ramstage-y += exception.c
 ramstage-y += exception_asm.S
+ramstage-y += mmu.c
 
 ramstage-c-ccopts += $(armv8_flags)
 ramstage-S-ccopts += $(armv8_asm_flags)