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author | Deepa Dinamani <deepad@codeaurora.org> | 2015-01-12 11:57:09 -0800 |
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committer | Patrick Georgi <pgeorgi@google.com> | 2015-04-17 09:59:08 +0200 |
commit | 1c2748d113014e7e675e6ece17c6e916a6a4ec7d (patch) | |
tree | 9c2369fc09a437eb85c9b2391addd9a9f0d0b7a8 /src/mainboard/google/storm/mmu.c | |
parent | efe279d422fcdae72f9ad54b348aa445a8e45666 (diff) | |
download | coreboot-1c2748d113014e7e675e6ece17c6e916a6a4ec7d.tar.xz |
ipq806x: Add support for mmu in bootblock.
move mmu setup from RAM stage to boot block
Enabling mmu earlier, helps speed up the boot time.
BRANCH=storm
BUG=chrome-os-partner:35024
TEST=Verified the mmu table dump matches the programmed values.
Change-Id: I8f581538d5dfd0d78538c9fe50f689d54b740685
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: fb799a6d61f9c2f478434a71584d0edb94af4b59
Original-Change-Id: I110497875002a88add7eb4312a70c0de8c28bc4f
Original-Signed-off-by: Deepa Dinamani <deepad@codeaurora.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/247120
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Original-Commit-Queue: Trevor Bourget <tbourget@codeaurora.org>
Reviewed-on: http://review.coreboot.org/9756
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src/mainboard/google/storm/mmu.c')
-rw-r--r-- | src/mainboard/google/storm/mmu.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/src/mainboard/google/storm/mmu.c b/src/mainboard/google/storm/mmu.c new file mode 100644 index 0000000000..47e3b09789 --- /dev/null +++ b/src/mainboard/google/storm/mmu.c @@ -0,0 +1,67 @@ +/* Copyright (c) 2015, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <arch/cache.h> +#include <symbols.h> +#include "mmu.h" + +/* convenient shorthand (in MB) */ +#define RPM_START ((uintptr_t)_rpm / KiB) +#define RPM_END ((uintptr_t)_erpm / KiB) +#define RPM_SIZE (RPM_END - RPM_START) +#define SRAM_START ((uintptr_t)_sram / KiB) +#define SRAM_END ((uintptr_t)_esram / KiB) +#define DRAM_START ((uintptr_t)_dram / MiB) +#define DRAM_SIZE (CONFIG_DRAM_SIZE_MB) +#define DRAM_END (DRAM_START + DRAM_SIZE) + +/* DMA memory for drivers */ +#define DMA_START ((uintptr_t)_dma_coherent / MiB) +#define DMA_SIZE (_dma_coherent_size / MiB) + +void setup_dram_mappings(enum dram_state dram) +{ + if (dram == DRAM_INITIALIZED) { + mmu_config_range(DRAM_START, DRAM_SIZE, DCACHE_WRITEBACK); + /* Map DMA memory */ + mmu_config_range(DMA_START, DMA_SIZE, DCACHE_OFF); + } else { + mmu_disable_range(DRAM_START, DRAM_SIZE); + /* Map DMA memory */ + mmu_disable_range(DMA_START, DMA_SIZE); + } +} + +void setup_mmu(enum dram_state dram) +{ + dcache_mmu_disable(); + + /* start with mapping everything as strongly ordered. */ + mmu_config_range(0, 4096, DCACHE_OFF); + + /* Map Device memory. */ + mmu_config_range_kb(RPM_START, RPM_SIZE, DCACHE_OFF); + + /* TODO: disable Page 0 for trapping NULL pointer references. */ + + mmu_config_range_kb(SRAM_START, SRAM_END - SRAM_START, + DCACHE_WRITEBACK); + + /* Map DRAM memory */ + setup_dram_mappings(dram); + + mmu_disable_range(DRAM_END, 4096 - DRAM_END); + + mmu_init(); + + dcache_mmu_enable(); +} |