| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <arch/stages.h> |
| #include <console/console.h> |
| #include <fmap.h> |
| #include <soc/dramc_param.h> |
| #include <soc/emi.h> |
| #include <soc/mmu_operations.h> |
| #include <soc/mt6359p.h> |
| |
| /* This must be defined in chromeos.fmd in same name and size. */ |
| #define CALIBRATION_REGION "RW_DDR_TRAINING" |
| #define CALIBRATION_REGION_SIZE 0x2000 |
| |
| _Static_assert(sizeof(struct dramc_param) <= CALIBRATION_REGION_SIZE, |
| "sizeof(struct dramc_param) exceeds " CALIBRATION_REGION); |
| |
| static bool read_calibration_data_from_flash(struct dramc_param *dparam) |
| { |
| const size_t length = sizeof(*dparam); |
| size_t ret = fmap_read_area(CALIBRATION_REGION, dparam, length); |
| printk(BIOS_DEBUG, "read data from flash, ret=%#zx, length=%#zx\n", ret, length); |
| |
| return ret == length; |
| } |
| |
| static bool write_calibration_data_to_flash(const struct dramc_param *dparam) |
| { |
| const size_t length = sizeof(*dparam); |
| size_t ret = fmap_overwrite_area(CALIBRATION_REGION, dparam, length); |
| printk(BIOS_DEBUG, "write data from flash, ret=%#zx, length=%#zx\n", ret, length); |
| |
| return ret == length; |
| } |
| |
| /* dramc_param is ~2K and too large to fit in stack. */ |
| static struct dramc_param dramc_parameter; |
| |
| static struct dramc_param_ops dparam_ops = { |
| .param = &dramc_parameter, |
| .read_from_flash = &read_calibration_data_from_flash, |
| .write_to_flash = &write_calibration_data_to_flash, |
| }; |
| |
| void platform_romstage_main(void) |
| { |
| mt6359p_romstage_init(); |
| mt_mem_init(&dparam_ops); |
| mtk_mmu_after_dram(); |
| } |