When fixed offset via CONFIG_SYS_MMC_U_BOOT_OFFS is not specified then expects that U-Boot proper is placed immediately after SPL without any additional padding.
This allows to generate smaller SPL+U-Boot final binary as it is not required to specify fixed offset to U-Boot proper at SPL compile time.
In this case offset to U-Boot proper is calculated at SPL compile time in linker script.
Signed-off-by: Pali Rohár pali@kernel.org --- arch/powerpc/cpu/mpc85xx/u-boot-spl.lds | 10 ++++++++++ drivers/mmc/fsl_esdhc_spl.c | 8 ++++++++ 2 files changed, 18 insertions(+)
diff --git a/arch/powerpc/cpu/mpc85xx/u-boot-spl.lds b/arch/powerpc/cpu/mpc85xx/u-boot-spl.lds index 272e94a1f169..cfb55939468a 100644 --- a/arch/powerpc/cpu/mpc85xx/u-boot-spl.lds +++ b/arch/powerpc/cpu/mpc85xx/u-boot-spl.lds @@ -59,6 +59,13 @@ SECTIONS __init_begin = .; __init_end = .; _end = .; + +#ifdef CONFIG_SYS_MPC85XX_NO_RESETVEC +#if defined(CONFIG_SDCARD) && !defined(CONFIG_SYS_MMC_U_BOOT_OFFS) + mmc_u_boot_offs = .; +#endif +#endif + #ifdef CONFIG_SPL_SKIP_RELOCATE . = ALIGN(4); __bss_start = .; @@ -91,6 +98,9 @@ SECTIONS .resetvec IMAGE_TEXT_BASE + RESET_VECTOR_OFFSET : { KEEP(*(.resetvec)) } = 0xffff +#if defined(CONFIG_SDCARD) && !defined(CONFIG_SYS_MMC_U_BOOT_OFFS) + mmc_u_boot_offs = .; +#endif #endif
#ifndef CONFIG_SPL_SKIP_RELOCATE diff --git a/drivers/mmc/fsl_esdhc_spl.c b/drivers/mmc/fsl_esdhc_spl.c index e3175de16bab..139b4d853b7a 100644 --- a/drivers/mmc/fsl_esdhc_spl.c +++ b/drivers/mmc/fsl_esdhc_spl.c @@ -9,6 +9,10 @@ #include <mmc.h> #include <malloc.h>
+#ifndef CONFIG_SYS_MMC_U_BOOT_OFFS +extern uchar mmc_u_boot_offs[]; +#endif + /* * The environment variables are written to just after the u-boot image * on SDCard, so we must read the MBR to get the start address and code @@ -149,7 +153,11 @@ again: val = *(tmp_buf + blk_off + ESDHC_BOOT_IMAGE_ADDR + i); offset = (offset << 8) + val; } +#ifndef CONFIG_SYS_MMC_U_BOOT_OFFS + offset += (ulong)&mmc_u_boot_offs - CONFIG_SPL_TEXT_BASE; +#else offset += CONFIG_SYS_MMC_U_BOOT_OFFS; +#endif #endif /* * Load U-Boot image from mmc into RAM