diff options
| -rw-r--r-- | arch/arm/cpu/armv7/at91/config.mk | 10 | ||||
| -rw-r--r-- | doc/README.atmel_pmecc | 21 | ||||
| -rw-r--r-- | spl/Makefile | 11 | ||||
| -rw-r--r-- | tools/Makefile | 2 | ||||
| -rw-r--r-- | tools/atmel_pmecc_params.c | 51 |
5 files changed, 95 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/at91/config.mk b/arch/arm/cpu/armv7/at91/config.mk new file mode 100644 index 0000000..09eab70 --- /dev/null +++ b/arch/arm/cpu/armv7/at91/config.mk @@ -0,0 +1,10 @@ +# +# Copyright (C) 2014, Andreas Bießmann <andreas.devel@googlemail.com> +# +# SPDX-License-Identifier: GPL-2.0+ +# +ifdef CONFIG_SPL_BUILD +ALL-y += boot.bin +else +ALL-y += u-boot.img +endif diff --git a/doc/README.atmel_pmecc b/doc/README.atmel_pmecc index cf8373b..cc0f73d 100644 --- a/doc/README.atmel_pmecc +++ b/doc/README.atmel_pmecc @@ -27,3 +27,24 @@ Take AT91SAM9X5EK as an example, the board definition file likes: #define CONFIG_ATMEL_NAND_HW_PMECC 1 #define CONFIG_PMECC_CAP 2 #define CONFIG_PMECC_SECTOR_SIZE 512 + +How to enable PMECC header for direct programmable boot.bin +----------------------------------------------------------- +2014-05-19 Andreas Bießmann <andreas.devel@googlemail.com> + +The usual way to program SPL into NAND flash is to use the SAM-BA Atmel tool. +This however is often not usable when doing field updates. To be able to +program a SPL binary into NAND flash we need to add the PMECC header to the +binary before. Chapter '12.4.4.1 NAND Flash Boot: NAND Flash Detection' in +sama5d3 SoC spec (as of 03. April 2014) defines how this PMECC header has to +look like. In order to do so we have a new image type added to mkimage to +generate this PMECC header and integrated this into the build process of SPL. + +To enable the generation of atmel PMECC header for SPL one need to define +CONFIG_SPL_GENERATE_ATMEL_PMECC_HEADER. The required parameters are taken from +board configuration and compiled into the host tools atmel_pmecc_params. This +tool will be called in build process to parametrize mkimage for atmelimage +type. The mkimage tool has intentionally _not_ compiled in those parameters. + +The mkimage image type atmelimage also set the 6'th interrupt vector to the +correct value. This feature can also be used to setup a boot.bin for MMC boot. diff --git a/spl/Makefile b/spl/Makefile index bfb7c8a..bf677aa 100644 --- a/spl/Makefile +++ b/spl/Makefile @@ -183,6 +183,17 @@ MKIMAGEFLAGS_MLO.byteswap = -T omapimage -n byteswap -a $(CONFIG_SPL_TEXT_BASE) MLO MLO.byteswap: $(obj)/u-boot-spl.bin $(call if_changed,mkimage) +MKIMAGEFLAGS_boot.bin = -T atmelimage + +ifeq ($(CONFIG_SPL_GENERATE_ATMEL_PMECC_HEADER),y) +MKIMAGEFLAGS_boot.bin += -n $(shell $(obj)/../tools/atmel_pmecc_params) + +boot.bin: $(obj)/../tools/atmel_pmecc_params +endif + +boot.bin: $(obj)/u-boot-spl.bin + $(call if_changed,mkimage) + ALL-y += $(obj)/$(SPL_BIN).bin ifdef CONFIG_SAMSUNG diff --git a/tools/Makefile b/tools/Makefile index e6d8045..7610557 100644 --- a/tools/Makefile +++ b/tools/Makefile @@ -38,6 +38,8 @@ ENVCRC-$(CONFIG_ENV_IS_IN_NVRAM) = y ENVCRC-$(CONFIG_ENV_IS_IN_SPI_FLASH) = y CONFIG_BUILD_ENVCRC ?= $(ENVCRC-y) +hostprogs-$(CONFIG_SPL_GENERATE_ATMEL_PMECC_HEADER) += atmel_pmecc_params$(SFX) + # TODO: CONFIG_CMD_LICENSE does not work hostprogs-$(CONFIG_CMD_LICENSE) += bin2header$(SFX) hostprogs-$(CONFIG_LCD_LOGO) += bmp_logo$(SFX) diff --git a/tools/atmel_pmecc_params.c b/tools/atmel_pmecc_params.c new file mode 100644 index 0000000..8eaf27f --- /dev/null +++ b/tools/atmel_pmecc_params.c @@ -0,0 +1,51 @@ +/* + * (C) Copyright 2014 Andreas Bießmann <andreas.devel@googlemail.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +/* + * This is a host tool for generating an appropriate string out of board + * configuration. The string is required for correct generation of PMECC + * header which in turn is required for NAND flash booting of Atmel AT91 style + * hardware. + * + * See doc/README.atmel_pmecc for more information. + */ + +#include <config.h> +#include <stdlib.h> + +static int pmecc_get_ecc_bytes(int cap, int sector_size) +{ + int m = 12 + sector_size / 512; + return (m * cap + 7) / 8; +} + +int main(int argc, char *argv[]) +{ + unsigned int use_pmecc = 0; + unsigned int sector_per_page; + unsigned int sector_size = CONFIG_PMECC_SECTOR_SIZE; + unsigned int oob_size = CONFIG_SYS_NAND_OOBSIZE; + unsigned int ecc_bits = CONFIG_PMECC_CAP; + unsigned int ecc_offset; + +#ifdef CONFIG_ATMEL_NAND_HW_PMECC + use_pmecc = 1; +#endif + + sector_per_page = CONFIG_SYS_NAND_PAGE_SIZE / CONFIG_PMECC_SECTOR_SIZE; + ecc_offset = oob_size - + pmecc_get_ecc_bytes(ecc_bits, sector_size) * sector_per_page; + + printf("usePmecc=%d,", use_pmecc); + printf("sectorPerPage=%d,", sector_per_page); + printf("sectorSize=%d,", sector_size); + printf("spareSize=%d,", oob_size); + printf("eccBits=%d,", ecc_bits); + printf("eccOffset=%d", ecc_offset); + printf("\n"); + + exit(EXIT_SUCCESS); +} |