Add loaders for SPL and TPL so that the next stage can be loaded from memory-mapped SPI or, failing that, the Fast SPI driver.
Signed-off-by: Simon Glass sjg@chromium.org
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Changes in v4: None Changes in v3: - Add a driver for APL SPI for TPL (using of-platdata) - Support TPL without CONFIG_TPL_SPI_SUPPORT - Support bootstage timing
Changes in v2: None
arch/x86/cpu/apollolake/Makefile | 2 + arch/x86/cpu/apollolake/spl.c | 202 +++++++++++++++++++++++++++++++ 2 files changed, 204 insertions(+) create mode 100644 arch/x86/cpu/apollolake/spl.c
diff --git a/arch/x86/cpu/apollolake/Makefile b/arch/x86/cpu/apollolake/Makefile index 875d454157..1fde400d77 100644 --- a/arch/x86/cpu/apollolake/Makefile +++ b/arch/x86/cpu/apollolake/Makefile @@ -2,7 +2,9 @@ # # Copyright 2019 Google LLC
+obj-$(CONFIG_SPL_BUILD) += spl.o obj-$(CONFIG_SPL_BUILD) += systemagent.o + ifndef CONFIG_TPL_BUILD obj-y += punit.o endif diff --git a/arch/x86/cpu/apollolake/spl.c b/arch/x86/cpu/apollolake/spl.c new file mode 100644 index 0000000000..a12379e312 --- /dev/null +++ b/arch/x86/cpu/apollolake/spl.c @@ -0,0 +1,202 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2019 Google LLC + */ + +#include <common.h> +#include <binman_sym.h> +#include <dm.h> +#include <spi.h> +#include <spl.h> +#include <spi_flash.h> +#include <asm/fast_spi.h> +#include <asm/spl.h> +#include <asm/arch/cpu.h> +#include <asm/arch/iomap.h> +#include <dm/device-internal.h> +#include <dm/uclass-internal.h> + +/* + * We need to read well past the end of the region in order for execution from + * the loaded data to work. It is not clear why. + */ +#define SAFETY_MARGIN 0x4000 + +binman_sym_declare(ulong, u_boot_spl, image_pos); +binman_sym_declare(ulong, u_boot_spl, size); +/* U-Boot image_pos is declared by common/spl/spl.c */ +binman_sym_declare(ulong, u_boot_any, size); + +static ulong get_image_pos(void) +{ + return spl_phase() == PHASE_TPL ? + binman_sym(ulong, u_boot_spl, image_pos) : + binman_sym(ulong, u_boot_any, image_pos); +} + +static ulong get_image_size(void) +{ + return spl_phase() == PHASE_TPL ? + binman_sym(ulong, u_boot_spl, size) : + binman_sym(ulong, u_boot_any, size); +} + +/* This reads the next phase from mapped SPI flash */ +static int rom_load_image(struct spl_image_info *spl_image, + struct spl_boot_device *bootdev) +{ + ulong spl_pos = get_image_pos(); + ulong spl_size = get_image_size(); + struct udevice *dev; + ulong map_base; + size_t map_size; + uint offset; + int ret; + + spl_image->size = CONFIG_SYS_MONITOR_LEN; /* We don't know SPL size */ + spl_image->entry_point = spl_phase() == PHASE_TPL ? + CONFIG_SPL_TEXT_BASE : CONFIG_SYS_TEXT_BASE; + spl_image->load_addr = spl_image->entry_point; + spl_image->os = IH_OS_U_BOOT; + spl_image->name = "U-Boot"; + debug("Reading from mapped SPI %lx, size %lx", spl_pos, spl_size); + + if (CONFIG_IS_ENABLED(SPI_FLASH_SUPPORT)) { + ret = uclass_find_first_device(UCLASS_SPI_FLASH, &dev); + if (ret) + return log_msg_ret("spi_flash", ret); + if (!dev) + return log_msg_ret("spi_flash dev", -ENODEV); + ret = dm_spi_get_mmap(dev, &map_base, &map_size, &offset); + if (ret) + return log_msg_ret("mmap", ret); + } else { + ret = fast_spi_get_bios_mmap(PCH_DEV_SPI, &map_base, &map_size, + &offset); + if (ret) + return ret; + } + spl_pos += map_base & ~0xff000000; + debug(", base %lx, pos %lx\n", map_base, spl_pos); + bootstage_start(BOOTSTAGE_ID_ACCUM_MMAP_SPI, "mmap_spi"); + memcpy((void *)spl_image->load_addr, (void *)spl_pos, + spl_size + SAFETY_MARGIN); + bootstage_accum(BOOTSTAGE_ID_ACCUM_MMAP_SPI); + + return 0; +} +SPL_LOAD_IMAGE_METHOD("Mapped SPI", 2, BOOT_DEVICE_SPI_MMAP, rom_load_image); + +#if CONFIG_IS_ENABLED(SPI_FLASH_SUPPORT) + +static int apl_flash_std_read(struct udevice *dev, u32 offset, size_t len, + void *buf) +{ + struct spi_flash *flash = dev_get_uclass_priv(dev); + struct mtd_info *mtd = &flash->mtd; + size_t retlen; + + return log_ret(mtd->_read(mtd, offset, len, &retlen, buf)); +} + +static int apl_flash_probe(struct udevice *dev) +{ + return spi_flash_std_probe(dev); +} + +/* + * Manually set the parent of the SPI flash to SPI, since dtoc doesn't. We also + * need to allocate the parent_platdata since by the time this function is + * called device_bind() has already gone past that step. + */ +static int apl_flash_bind(struct udevice *dev) +{ + if (CONFIG_IS_ENABLED(OF_PLATDATA)) { + struct dm_spi_slave_platdata *plat; + struct udevice *spi; + int ret; + + ret = uclass_first_device_err(UCLASS_SPI, &spi); + if (ret) + return ret; + dev->parent = spi; + + plat = calloc(sizeof(*plat), 1); + if (!plat) + return -ENOMEM; + dev->parent_platdata = plat; + } + + return 0; +} + +static const struct dm_spi_flash_ops apl_flash_ops = { + .read = apl_flash_std_read, +}; + +static const struct udevice_id apl_flash_ids[] = { + { .compatible = "jedec,spi-nor" }, + { } +}; + +U_BOOT_DRIVER(winbond_w25q128fw) = { + .name = "winbond_w25q128fw", + .id = UCLASS_SPI_FLASH, + .of_match = apl_flash_ids, + .bind = apl_flash_bind, + .probe = apl_flash_probe, + .priv_auto_alloc_size = sizeof(struct spi_flash), + .ops = &apl_flash_ops, +}; + +/* This uses a SPI flash device to read the next phase */ +static int spl_fast_spi_load_image(struct spl_image_info *spl_image, + struct spl_boot_device *bootdev) +{ + ulong spl_pos = get_image_pos(); + ulong spl_size = get_image_size(); + struct udevice *dev; + int ret; + + ret = uclass_first_device_err(UCLASS_SPI_FLASH, &dev); + if (ret) + return ret; + + spl_image->size = CONFIG_SYS_MONITOR_LEN; /* We don't know SPL size */ + spl_image->entry_point = spl_phase() == PHASE_TPL ? + CONFIG_SPL_TEXT_BASE : CONFIG_SYS_TEXT_BASE; + spl_image->load_addr = spl_image->entry_point; + spl_image->os = IH_OS_U_BOOT; + spl_image->name = "U-Boot"; + spl_pos &= ~0xff000000; + debug("Reading from flash %lx, size %lx\n", spl_pos, spl_size); + ret = spi_flash_read_dm(dev, spl_pos, spl_size + SAFETY_MARGIN, + (void *)spl_image->load_addr); + if (ret) + return ret; + + return 0; +} +SPL_LOAD_IMAGE_METHOD("Fast SPI", 1, BOOT_DEVICE_FAST_SPI, + spl_fast_spi_load_image); + +void board_boot_order(u32 *spl_boot_list) +{ + bool use_spi_flash = BOOT_FROM_FAST_SPI_FLASH; + + if (use_spi_flash) { + spl_boot_list[0] = BOOT_DEVICE_FAST_SPI; + spl_boot_list[1] = BOOT_DEVICE_SPI_MMAP; + } else { + spl_boot_list[0] = BOOT_DEVICE_SPI_MMAP; + spl_boot_list[1] = BOOT_DEVICE_FAST_SPI; + } +} + +#else + +void board_boot_order(u32 *spl_boot_list) +{ + spl_boot_list[0] = BOOT_DEVICE_SPI_MMAP; +} +#endif