From: Fedor Ross fedor.ross@ifm.com
Factor out parsing of ROM log in function spl_mmc_emmc_boot_partition(). This can be helpful to detect a secondary image boot without fiddling around with MMC partitions. This way for example, U-Boot is able to detect a secondary image boot and can enter some fallback scenario like starting a recovery mode.
Signed-off-by: Fedor Ross fedor.ross@ifm.com Signed-off-by: Marek Vasut marex@denx.de --- Cc: Fabio Estevam festevam@gmail.com Cc: Peng Fan peng.fan@nxp.com Cc: Stefano Babic sbabic@denx.de --- arch/arm/mach-imx/imx8m/soc.c | 55 +++++++++++++++++++++++------------ 1 file changed, 37 insertions(+), 18 deletions(-)
diff --git a/arch/arm/mach-imx/imx8m/soc.c b/arch/arm/mach-imx/imx8m/soc.c index d5254886bed..b8d7a050dc9 100644 --- a/arch/arm/mach-imx/imx8m/soc.c +++ b/arch/arm/mach-imx/imx8m/soc.c @@ -647,19 +647,17 @@ struct rom_api *g_rom_api = (struct rom_api *)0x980;
#if defined(CONFIG_IMX8M) #include <spl.h> -int spl_mmc_emmc_boot_partition(struct mmc *mmc) +int imx8m_detect_secondary_image_boot(void) { u32 *rom_log_addr = (u32 *)0x9e0; u32 *rom_log; u8 event_id; - int i, part; - - part = default_spl_mmc_emmc_boot_partition(mmc); + int i, boot_secondary = 0;
/* If the ROM event log pointer is not valid. */ if (*rom_log_addr < 0x900000 || *rom_log_addr >= 0xb00000 || *rom_log_addr & 0x3) - return part; + return -EINVAL;
/* Parse the ROM event ID version 2 log */ rom_log = (u32 *)(uintptr_t)(*rom_log_addr); @@ -667,7 +665,7 @@ int spl_mmc_emmc_boot_partition(struct mmc *mmc) event_id = rom_log[i] >> 24; switch (event_id) { case 0x00: /* End of list */ - return part; + return boot_secondary; /* Log entries with 1 parameter, skip 1 */ case 0x80: /* Start to perform the device initialization */ case 0x81: /* The boot device initialization completes */ @@ -685,24 +683,45 @@ int spl_mmc_emmc_boot_partition(struct mmc *mmc) continue; /* Boot from the secondary boot image */ case 0x51: - /* - * Swap the eMMC boot partitions in case there was a - * fallback event (i.e. primary image was corrupted - * and that corruption was recognized by the BootROM), - * so the SPL loads the rest of the U-Boot from the - * correct eMMC boot partition, since the BootROM - * leaves the boot partition set to the corrupted one. - */ - if (part == 1) - part = 2; - else if (part == 2) - part = 1; + boot_secondary = 1; continue; default: continue; } }
+ return boot_secondary; +} + +int spl_mmc_emmc_boot_partition(struct mmc *mmc) +{ + int part, ret; + + part = default_spl_mmc_emmc_boot_partition(mmc); + if (part == 0) + return part; + + ret = imx8m_detect_secondary_image_boot(); + if (ret < 0) { + printf("Could not get boot partition! Using %d\n", part); + return part; + } + + if (ret == 1) { + /* + * Swap the eMMC boot partitions in case there was a + * fallback event (i.e. primary image was corrupted + * and that corruption was recognized by the BootROM), + * so the SPL loads the rest of the U-Boot from the + * correct eMMC boot partition, since the BootROM + * leaves the boot partition set to the corrupted one. + */ + if (part == 1) + part = 2; + else if (part == 2) + part = 1; + } + return part; } #endif