[U-Boot] [PATCH 2/7 v8] powerpc: mpc85xx: Support booting from SD Card with SPL

ying.zhang at freescale.com
2013-07-15T09:36:25Z

This patch introduces SPL to enable a loader stub that being loaded by
the code from the internal on-chip ROM. It loads the final uboot image
into DDR, then jump to it to begin execution.

The SPL's size is sizeable, the maximum size must not exceed the size of L2
SRAM. It initializes the DDR through SPD code, and copys final uboot image
to DDR. So there are two stage uboot images:
* spl_boot, 96KB size. The env variables are copied to L2 SRAM, so
that ddr spd code can get the interleaving mode setting in env. It
loads final uboot image from offset 96KB.
* final uboot image, size is variable depends on the functions
enabled.
This patch is on top of the patch:
SPL: Makefile: Build a separate autoconf.mk for SPL.

Signed-off-by: Ying Zhang <b40530@freescale.com>
---
Change from v7:
- No change.
Change from v6:
- Split to the patch "Support booting from SD Card with SPL" and the patch
- "Enable P1022DS to boot from SD Card with SPL". this patch only support
- booting from SD Card with SPL
Change from v5:
- Add new symbol CONFIG_SPL_ENV_IMPORT for contain the functionality
- env_import.
Change from v4:
- No change.
Change from v3:
- No change.
Change from v2:
- No change.
Change from v1:
- Split from "boot from SD card/SPI flash with SPL".

README | 4 +
arch/powerpc/cpu/mpc85xx/u-boot-spl.lds | 5 +
.../cpu/mpc8xxx/ddr/lc_common_dimm_params.c | 4 +
doc/README.mpc85xx-sd-spi-boot | 81 ++++++++++++
drivers/mmc/Makefile | 3 +
drivers/mmc/fsl_esdhc_spl.c | 131 ++++++++++++++++++++
drivers/mmc/mmc.c | 2 +
include/fsl_esdhc.h | 1 +
spl/Makefile | 3 +
9 files changed, 234 insertions(+), 0 deletions(-)
create mode 100644 doc/README.mpc85xx-sd-spi-boot
create mode 100644 drivers/mmc/fsl_esdhc_spl.c

diff --git a/README b/README
index 33b5728..eb453d8 100644
--- a/README
+++ b/README
@@ -3015,6 +3015,10 @@ FIT uImage format:
Support for NAND boot using simple NAND drivers that
expose the cmd_ctrl() interface.

+ CONFIG_SPL_MPC8XXX_INIT_DDR_SUPPORT
+ Set for the SPL on PPC mpc8xxx targets, support for
+ arch/powerpc/cpu/mpc8xxx/ddr/libddr.o in SPL binary.
+
CONFIG_SYS_NAND_5_ADDR_CYCLE, CONFIG_SYS_NAND_PAGE_COUNT,
CONFIG_SYS_NAND_PAGE_SIZE, CONFIG_SYS_NAND_OOBSIZE,
CONFIG_SYS_NAND_BLOCK_SIZE, CONFIG_SYS_NAND_BAD_BLOCK_POS,
diff --git a/arch/powerpc/cpu/mpc85xx/u-boot-spl.lds b/arch/powerpc/cpu/mpc85xx/u-boot-spl.lds
index 20284ed..8aeb1a0 100644
--- a/arch/powerpc/cpu/mpc85xx/u-boot-spl.lds
+++ b/arch/powerpc/cpu/mpc85xx/u-boot-spl.lds
@@ -60,6 +60,11 @@ SECTIONS
}
_edata = .;

+ . = .;
+ __start___ex_table = .;
+ __ex_table : { *(__ex_table) }
+ __stop___ex_table = .;
+
. = ALIGN(8);
__init_begin = .;
__init_end = .;
diff --git a/arch/powerpc/cpu/mpc8xxx/ddr/lc_common_dimm_params.c b/arch/powerpc/cpu/mpc8xxx/ddr/lc_common_dimm_params.c
index e958e13..56128a7 100644
--- a/arch/powerpc/cpu/mpc8xxx/ddr/lc_common_dimm_params.c
+++ b/arch/powerpc/cpu/mpc8xxx/ddr/lc_common_dimm_params.c
@@ -218,12 +218,16 @@ compute_lowest_common_dimm_parameters(const dimm_params_t *dimm_params,
if (dimm_params[i].n_ranks) {
if (dimm_params[i].registered_dimm) {
temp1 = 1;
+#ifndef CONFIG_SPL_BUILD
printf("Detected RDIMM %s\n",
dimm_params[i].mpart);
+#endif
} else {
temp2 = 1;
+#ifndef CONFIG_SPL_BUILD
printf("Detected UDIMM %s\n",
dimm_params[i].mpart);
+#endif
}
}
}
diff --git a/doc/README.mpc85xx-sd-spi-boot b/doc/README.mpc85xx-sd-spi-boot
new file mode 100644
index 0000000..d5043cc
--- /dev/null
+++ b/doc/README.mpc85xx-sd-spi-boot
@@ -0,0 +1,81 @@
+----------------------------------------
+Booting from On-Chip ROM (eSDHC or eSPI)
+----------------------------------------
+
+boot_format is a tool to write SD bootable images to a filesystem and build
+SD/SPI images to a binary file for writing later.
+
+When booting from an SD card/MMC, boot_format puts the configuration file and
+the RAM-based U-Boot image on the card.
+When booting from an EEPROM, boot_format generates a binary image that is used
+to boot from this EEPROM.
+
+Where to get boot_format:
+========================
+
+you can browse it online at:
+http://git.freescale.com/git/cgit.cgi/ppc/sdk/boot-format.git/
+
+Building
+========
+
+Run the following to build this project
+
+ $ make
+
+Execution
+=========
+
+boot_format runs under a regular Linux machine and requires a super user mode
+to run. Execute boot_format as follows.
+
+For building SD images by writing directly to a file system on SD media:
+
+ $ boot_format $config u-boot.bin -sd $device
+
+Where $config is the included config.dat file for your platform and $device
+is the target block device for the SD media on your computer.
+
+For build binary images directly a local file:
+
+ $ boot_format $config u-boot.bin -spi $file
+
+Where $file is the target file. Also keep in mind the u-boot.bin file needs
+to be the u-boot built for your particular platform and target media.
+
+Example: To generate a u-boot.bin for a P1022DS booting from SD, run the
+following in the u-boot repository:
+
+ $ make P1022DS_SDCARD
+
+Configuration Files
+===================
+
+Below are the configuration files to be used with a particular platform. Keep
+in mind that some of these config files are tied to the platforms DDR speed.
+Please see the SoC reference manual for more documentation.
+
+P1022DS config_sram_p1022ds.dat
+P2020DS config_sram_p2020ds.dat
+P2010DS config_sram_p2020ds.dat
+P1020RDB config_ddr2_1g_p1020rdb_533M.dat
+P1020RDB config_ddr2_1g_p1020rdb_667M.dat
+P2020RDB config_ddr2_1g_p2020rdb_800M.dat
+P2020RDB config_ddr2_1g_p2020rdb_667M.dat
+P2020RDB config_ddr3_1gb_64bit_p2020rdb_pc.dat
+P2010RDB config_ddr3_1gb_64bit_p2020rdb_pc.dat
+P1020RDB config_ddr3_1gb_p1_p2_rdb_pc_800M.dat
+P1011RDB config_ddr3_1gb_p1_p2_rdb_pc_800M.dat
+P1010RDB config_ddr3_1gb_p1010rdb_800M.dat
+P1014RDB config_ddr3_1gb_p1014rdb_800M.dat
+P1021RDB config_ddr3_1gb_p1_p2_rdb_pc_800M.dat
+P1012RDB config_ddr3_1gb_p1_p2_rdb_pc_800M.dat
+P1022DS config_ddr3_2gb_p1022ds.dat
+P1013DS config_ddr3_2gb_p1022ds.dat
+P1024RDB config_ddr3_1gb_p1_p2_rdb_pc_667M.dat
+P1013RDB config_ddr3_1gb_p1_p2_rdb_pc_667M.dat
+P1025RDB config_ddr3_1gb_p1_p2_rdb_pc_667M.dat
+P1016RDB config_ddr3_1gb_p1_p2_rdb_pc_667M.dat
+P1020UTM config_ddr3_1gb_p1_p2_rdb_pc_800M.dat
+P1020MBG config_ddr3_1gb_p1_p2_rdb_pc_800M.dat
+MPC8536DS config_ddr2_512m_mpc8536ds_667M.dat
diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
index 24648a2..7e1628b 100644
--- a/drivers/mmc/Makefile
+++ b/drivers/mmc/Makefile
@@ -48,6 +48,9 @@ COBJS-$(CONFIG_TEGRA_MMC) += tegra_mmc.o
COBJS-$(CONFIG_DWMMC) += dw_mmc.o
COBJS-$(CONFIG_EXYNOS_DWMMC) += exynos_dw_mmc.o
COBJS-$(CONFIG_ZYNQ_SDHCI) += zynq_sdhci.o
+ifdef CONFIG_SPL_BUILD
+COBJS-$(CONFIG_SPL_MMC_BOOT) += fsl_esdhc_spl.o
+endif

COBJS := $(COBJS-y)
SRCS := $(COBJS:.o=.c)
diff --git a/drivers/mmc/fsl_esdhc_spl.c b/drivers/mmc/fsl_esdhc_spl.c
new file mode 100644
index 0000000..37d8df3
--- /dev/null
+++ b/drivers/mmc/fsl_esdhc_spl.c
@@ -0,0 +1,131 @@
+/*
+ * Copyright 2013 Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ *
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ */
+
+#include <common.h>
+#include <mmc.h>
+#include <malloc.h>
+
+/*
+ * 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
+ * length of the u-boot image, then calculate the address of the env.
+ */
+#define ESDHC_BOOT_IMAGE_SIZE 0x48
+#define ESDHC_BOOT_IMAGE_ADDR 0x50
+#define MBRDBR_BOOT_SIG_55 0x1fe
+#define MBRDBR_BOOT_SIG_AA 0x1ff
+#define CONFIG_CFG_DATA_SECTOR 0
+
+/*
+ * The main entry for mmc booting. It's necessary that SDRAM is already
+ * configured and available since this code loads the main U-Boot image
+ * from mmc into SDRAM and starts it from there.
+ */
+
+void mmc_boot(void)
+{
+ __attribute__((noreturn)) void (*uboot)(void);
+ uint blk_start, blk_cnt, err;
+ u32 blklen;
+ uchar *tmp_buf;
+ uchar val;
+ uint i, byte_num;
+ u32 offset, code_len;
+ struct mmc *mmc;
+
+ mmc = find_mmc_device(0);
+ if (!mmc) {
+ puts("spl: mmc device not found!!\n");
+ hang();
+ }
+
+ blklen = mmc->read_bl_len;
+ tmp_buf = malloc(blklen);
+ if (!tmp_buf) {
+ puts("spl: malloc memory failed!!\n");
+ hang();
+ }
+ memset(tmp_buf, 0, blklen);
+
+ /*
+ * Read source addr from sd card
+ */
+ err = mmc->block_dev.block_read(0, CONFIG_CFG_DATA_SECTOR, \
+ 1, tmp_buf);
+ if (err != 1) {
+ puts("spl: mmc read failed!!\n");
+ free(tmp_buf);
+ hang();
+ }
+
+ val = *(tmp_buf + MBRDBR_BOOT_SIG_55);
+ if (0x55 != val) {
+ puts("spl: mmc signature is not valid!!\n");
+ free(tmp_buf);
+ hang();
+ }
+ val = *(tmp_buf + MBRDBR_BOOT_SIG_AA);
+ if (0xAA != val) {
+ puts("spl: mmc signature is not valid!!\n");
+ free(tmp_buf);
+ hang();
+ }
+
+ byte_num = 4;
+ offset = 0;
+ for (i = 0; i < byte_num; i++) {
+ val = *(tmp_buf + ESDHC_BOOT_IMAGE_ADDR + i);
+ offset = (offset << 8) + val;
+ }
+ offset += CONFIG_SYS_MMC_U_BOOT_OFFS;
+ /* Get the code size from offset 0x48 */
+ byte_num = 4;
+ code_len = 0;
+ for (i = 0; i < byte_num; i++) {
+ val = *(tmp_buf + ESDHC_BOOT_IMAGE_SIZE + i);
+ code_len = (code_len << 8) + val;
+ }
+ code_len -= CONFIG_SYS_MMC_U_BOOT_OFFS;
+ /*
+ * Load U-Boot image from mmc into RAM
+ */
+ blk_start = ALIGN(offset, mmc->read_bl_len) / mmc->read_bl_len;
+ blk_cnt = ALIGN(code_len, mmc->read_bl_len) / mmc->read_bl_len;
+ err = mmc->block_dev.block_read(0, blk_start, blk_cnt,
+ (uchar *)CONFIG_SYS_MMC_U_BOOT_DST);
+ if (err != blk_cnt) {
+ puts("spl: mmc read failed!!\n");
+ free(tmp_buf);
+ hang();
+ }
+
+ /*
+ * Clean d-cache and invalidate i-cache, to
+ * make sure that no stale data is executed.
+ */
+ flush_cache(CONFIG_SYS_MMC_U_BOOT_DST, CONFIG_SYS_MMC_U_BOOT_SIZE);
+
+ /*
+ * Jump to U-Boot image
+ */
+ uboot = (void *)CONFIG_SYS_MMC_U_BOOT_START;
+ (*uboot)();
+}
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 73f7195..a9ada1f 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -1499,7 +1499,9 @@ int mmc_initialize(bd_t *bis)
if (board_mmc_init(bis) < 0)
cpu_mmc_init(bis);

+#ifndef CONFIG_SPL_BUILD
print_mmc_devices(',');
+#endif

do_preinit();
return 0;
diff --git a/include/fsl_esdhc.h b/include/fsl_esdhc.h
index 67d6057..b17c424 100644
--- a/include/fsl_esdhc.h
+++ b/include/fsl_esdhc.h
@@ -198,5 +198,6 @@ void fdt_fixup_esdhc(void *blob, bd_t *bd);
static inline int fsl_esdhc_mmc_init(bd_t *bis) { return -ENOSYS; }
static inline void fdt_fixup_esdhc(void *blob, bd_t *bd) {}
#endif /* CONFIG_FSL_ESDHC */
+void mmc_boot(void);

#endif /* __FSL_ESDHC_H__ */
diff --git a/spl/Makefile b/spl/Makefile
index 01873de..eef8c87 100644
--- a/spl/Makefile
+++ b/spl/Makefile
@@ -51,6 +51,9 @@ LIBS-y += arch/powerpc/cpu/mpc8xxx/lib8xxx.o
endif
ifeq ($(CPU),mpc85xx)
LIBS-y += arch/powerpc/cpu/mpc8xxx/lib8xxx.o
+ifdef CONFIG_SPL_MPC8XXX_INIT_DDR_SUPPORT
+LIBS-y += arch/powerpc/cpu/mpc8xxx/ddr/libddr.o
+endif
endif
ifeq ($(CPU),mpc86xx)
LIBS-y += arch/powerpc/cpu/mpc8xxx/lib8xxx.o
--
1.7.0.4