diff options
Diffstat (limited to 'src/soc/imgtec/pistachio/bootblock.c')
| -rw-r--r-- | src/soc/imgtec/pistachio/bootblock.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/src/soc/imgtec/pistachio/bootblock.c b/src/soc/imgtec/pistachio/bootblock.c index 90112646c4..1276a24153 100644 --- a/src/soc/imgtec/pistachio/bootblock.c +++ b/src/soc/imgtec/pistachio/bootblock.c @@ -21,6 +21,9 @@ #include <stdint.h> #include <arch/cpu.h> +#include <arch/mmu.h> +#include <assert.h> +#include <symbols.h> static void bootblock_cpu_init(void) { @@ -37,3 +40,26 @@ static void bootblock_cpu_init(void) /* And make sure that it starts from zero. */ write_c0_count(0); } + +static void bootblock_mmu_init(void) +{ + uint32_t null_guard_size = 1 * MiB; + uint32_t dram_base, dram_size; + + write_c0_wired(0); + + dram_base = (uint32_t)_dram; + dram_size = CONFIG_DRAM_SIZE_MB * MiB; + + /* + * To be able to catch NULL pointer dereference attempts, lets not map + * memory close to zero. + */ + if (dram_base < null_guard_size) { + dram_base += null_guard_size; + dram_size -= null_guard_size; + } + + assert(!identity_map(dram_base, dram_size)); + assert(!identity_map((uint32_t)_sram, _sram_size)); +} |