The AT91 BootROM loads a boot.bin file from the first FAT partition into SRAM, when booting from MMC. SoCs like the Zynq do likewise. To avoid the need for a different configuration for each of the bootloader stages, add PBL support for reading from FAT. This way each stage need only have a different PBL entry point. The first two commits are valid as-is. The rest makes use of them for the sama5d2. The sama5d2 first stage support is not yet complete (and won't be for a while if it's up to me), but Lucas asked about it for the Zynq, so here it is. Feedback welcome. Cheers, Ahmad Fatoum (5): pbl: add block I/O API fs: fat: extend for in-PBL support mci: add first-stage at91-sdhci driver ARM: at91: add helpers for MCI barebox chain-loading [WIP] ARM: at91: sama5d27-som1: add first stage entry point arch/arm/boards/sama5d27-som1/lowlevel.c | 16 + arch/arm/mach-at91/Kconfig | 6 + arch/arm/mach-at91/Makefile | 1 + arch/arm/mach-at91/include/mach/xload.h | 12 + arch/arm/mach-at91/xload-mmc.c | 51 +++ drivers/mci/Kconfig | 4 + drivers/mci/Makefile | 1 + drivers/mci/atmel-sdhci-common.c | 279 ++++++++++++++ drivers/mci/atmel-sdhci-pbl.c | 440 +++++++++++++++++++++++ drivers/mci/atmel-sdhci.h | 38 ++ drivers/mci/sdhci.h | 17 + fs/Makefile | 2 +- fs/fat/Kconfig | 7 + fs/fat/Makefile | 4 +- fs/fat/diskio.h | 7 +- fs/fat/fat-pbl.c | 148 ++++++++ fs/fat/ff.c | 104 +++--- fs/fat/ff.h | 17 +- images/Makefile.at91 | 4 + include/pbl.h | 7 + 20 files changed, 1112 insertions(+), 53 deletions(-) create mode 100644 arch/arm/mach-at91/include/mach/xload.h create mode 100644 arch/arm/mach-at91/xload-mmc.c create mode 100644 drivers/mci/atmel-sdhci-common.c create mode 100644 drivers/mci/atmel-sdhci-pbl.c create mode 100644 drivers/mci/atmel-sdhci.h create mode 100644 fs/fat/fat-pbl.c -- 2.20.1 _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
