Rockchip BROM writes a boot source id at CFG_IRAM_BASE + 0x10, this id indicates from what storage media TPL/SPL was loaded from.
SPL uses this id to determine what device "same-as-spl" represent when determining from where FIT should be loaded. This works as long as the boot_devices array contain a matching id <-> node path entry.
However, SPL typically load a small part of TF-A into SRAM and on RK3399 this overwrites the CFG_IRAM_BASE + 0x10 addr used for boot source id.
For affected devices the u-boot,spl-boot-device would not be set when booting from SPI flash and the flash@0 node was not explicitly listed in the u-boot,spl-boot-order prop.
Here boot source id is 3 before FIT images is loaded, and 0 after:
U-Boot SPL 2024.04-rc4 (Mar 15 2024 - 17:26:19 +0000) board_spl_was_booted_from: brom_bootdevice_id 3 maps to '/spi@ff1d0000/flash@0' Trying to boot from SPI ## Checking hash(es) for config config-1 ... OK ## Checking hash(es) for Image atf-1 ... sha256+ OK ## Checking hash(es) for Image u-boot ... sha256+ OK ## Checking hash(es) for Image fdt-1 ... sha256+ OK ## Checking hash(es) for Image atf-2 ... sha256+ OK ## Checking hash(es) for Image atf-3 ... sha256+ OK board_spl_was_booted_from: failed to resolve brom_bootdevice_id 0 spl_decode_boot_device: could not find udevice for /mmc@fe330000 spl_decode_boot_device: could not find udevice for /mmc@fe320000 spl_perform_fixups: could not map boot_device to ofpath: -19
Use a static brom_bootsource_id_cache to save the boot source id after an initial read from SRAM to fix this, this allow spl_perform_fixups() to resolve correct boot source path for "same-as-spl" after SPL have loaded TF-A related FIT images into memory.
With this the spl-boot-device prop can correctly be resolved to the SPI flash node in the control FDT:
=> fdt addr ${fdtcontroladdr} Working FDT set to f1ee6710 => fdt list /chosen chosen { u-boot,spl-boot-device = "/spi@ff1d0000/flash@0"; stdout-path = "serial2:1500000n8"; u-boot,spl-boot-order = "same-as-spl", "/mmc@fe330000", "/mmc@fe320000"; };
Fixes: d57e16c7e712 ("rockchip: find U-boot proper boot device by inverting the logic that sets it") Signed-off-by: Jonas Karlman jonas@kwiboo.se Reviewed-by: Kever Yang kever.yang@rock-chips.com --- v2: - Only cache boot source id that can be resolved to a node path - Make use of the new BROM_BOOTSOURCE_UNKNOWN enum value - Update commit message - Add fixes tag - Collect r-b tag --- arch/arm/mach-rockchip/spl.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-)
diff --git a/arch/arm/mach-rockchip/spl.c b/arch/arm/mach-rockchip/spl.c index 1586a093fc37..3ce7e792b5a2 100644 --- a/arch/arm/mach-rockchip/spl.c +++ b/arch/arm/mach-rockchip/spl.c @@ -32,18 +32,26 @@ __weak const char * const boot_devices[BROM_LAST_BOOTSOURCE + 1] = {
const char *board_spl_was_booted_from(void) { - u32 bootdevice_brom_id = readl(BROM_BOOTSOURCE_ID_ADDR); + static u32 brom_bootsource_id_cache = BROM_BOOTSOURCE_UNKNOWN; + u32 bootdevice_brom_id; const char *bootdevice_ofpath = NULL;
+ if (brom_bootsource_id_cache != BROM_BOOTSOURCE_UNKNOWN) + bootdevice_brom_id = brom_bootsource_id_cache; + else + bootdevice_brom_id = readl(BROM_BOOTSOURCE_ID_ADDR); + if (bootdevice_brom_id < ARRAY_SIZE(boot_devices)) bootdevice_ofpath = boot_devices[bootdevice_brom_id];
- if (bootdevice_ofpath) + if (bootdevice_ofpath) { + brom_bootsource_id_cache = bootdevice_brom_id; debug("%s: brom_bootdevice_id %x maps to '%s'\n", __func__, bootdevice_brom_id, bootdevice_ofpath); - else + } else { debug("%s: failed to resolve brom_bootdevice_id %x\n", __func__, bootdevice_brom_id); + }
return bootdevice_ofpath; }