| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <boot_device.h> |
| #include <commonlib/helpers.h> |
| #include <commonlib/region.h> |
| #include <spi_flash.h> |
| #include <string.h> |
| #include <types.h> |
| |
| /* The ROM is memory mapped just below 4GiB. Form a pointer for the base. */ |
| #define rom_base ((void *)(uintptr_t)(0x100000000ULL - CONFIG_ROM_SIZE)) |
| |
| static void *spi_dma_mmap(const struct region_device *rd, size_t offset, size_t size __unused) |
| { |
| const struct mem_region_device *mdev; |
| |
| mdev = container_of(rd, __typeof__(*mdev), rdev); |
| |
| return &mdev->base[offset]; |
| } |
| |
| static int spi_dma_munmap(const struct region_device *rd __unused, void *mapping __unused) |
| { |
| return 0; |
| } |
| |
| static ssize_t spi_dma_readat_mmap(const struct region_device *rd, void *b, size_t offset, |
| size_t size) |
| { |
| const struct mem_region_device *mdev; |
| |
| mdev = container_of(rd, __typeof__(*mdev), rdev); |
| |
| memcpy(b, &mdev->base[offset], size); |
| |
| return size; |
| } |
| |
| const struct region_device_ops spi_dma_rdev_ro_ops = { |
| .mmap = spi_dma_mmap, |
| .munmap = spi_dma_munmap, |
| .readat = spi_dma_readat_mmap, |
| }; |
| |
| static const struct mem_region_device boot_dev = { |
| .base = rom_base, |
| .rdev = REGION_DEV_INIT(&spi_dma_rdev_ro_ops, 0, CONFIG_ROM_SIZE), |
| }; |
| |
| const struct region_device *boot_device_ro(void) |
| { |
| return &boot_dev.rdev; |
| } |
| |
| uint32_t spi_flash_get_mmap_windows(struct flash_mmap_window *table) |
| { |
| table->flash_base = 0; |
| table->host_base = (uint32_t)(uintptr_t)rom_base; |
| table->size = CONFIG_ROM_SIZE; |
| |
| return 1; |
| } |