diff options
Diffstat (limited to 'src/mainboard')
| -rw-r--r-- | src/mainboard/google/storm/mainboard.c | 38 |
1 files changed, 36 insertions, 2 deletions
diff --git a/src/mainboard/google/storm/mainboard.c b/src/mainboard/google/storm/mainboard.c index 0b0182fceb..1e622f4904 100644 --- a/src/mainboard/google/storm/mainboard.c +++ b/src/mainboard/google/storm/mainboard.c @@ -1,7 +1,7 @@ /* * This file is part of the coreboot project. * - * Copyright 2013 Google Inc. + * Copyright 2014 Google Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -17,11 +17,45 @@ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ -#include <device/device.h> +#include <arch/cache.h> #include <boot/coreboot_tables.h> +#include <device/device.h> + +#define TO_MB(x) ((x)>>20) + +/* convenient shorthand (in MB) */ +#define DRAM_START TO_MB(CONFIG_SYS_SDRAM_BASE) +#define DRAM_SIZE (CONFIG_DRAM_SIZE_MB) +#define DRAM_END (DRAM_START + DRAM_SIZE) + +/* DMA memory for drivers */ +#define DMA_START TO_MB(CONFIG_DRAM_DMA_START) +#define DMA_SIZE TO_MB(CONFIG_DRAM_DMA_SIZE) + +static void setup_mmu(void) +{ + dcache_mmu_disable(); + + /* Map Device memory. */ + mmu_config_range(0, DRAM_START, DCACHE_OFF); + /* Disable Page 0 for trapping NULL pointer references. */ + mmu_disable_range(0, 1); + /* Map DRAM memory */ + mmu_config_range(DRAM_START, DRAM_SIZE, DCACHE_WRITEBACK); + /* Map DMA memory */ + if (DMA_SIZE) + mmu_config_range(DMA_START, DMA_SIZE, DCACHE_OFF); + + mmu_disable_range(DRAM_END, 4096 - DRAM_END); + + mmu_init(); + + dcache_mmu_enable(); +} static void mainboard_init(device_t dev) { + setup_mmu(); } static void mainboard_enable(device_t dev) |