From: Fabio Estevam festevam@gmail.com
Add Falcon mode support, which allows the SPL to load and jump to the Linux kernel directly, without the need of loading U-Boot proper.
CONFIG_SPL_OS_BOOT=y needs to be passed in the defconfig in order to use Falcon mode.
Signed-off-by: Fabio Estevam festevam@gmail.com Signed-off-by: Otavio Salvador otavio@ossystems.com.br --- board/technexion/pico-imx6/spl.c | 11 +++++++++++ include/configs/pico-imx6.h | 12 ++++++++++++ 2 files changed, 23 insertions(+)
diff --git a/board/technexion/pico-imx6/spl.c b/board/technexion/pico-imx6/spl.c index 5bf87023ac..06ad0a8c32 100644 --- a/board/technexion/pico-imx6/spl.c +++ b/board/technexion/pico-imx6/spl.c @@ -27,6 +27,17 @@ #define IMX6DQ_DRIVE_STRENGTH 0x30 #define IMX6SDL_DRIVE_STRENGTH 0x28
+#ifdef CONFIG_SPL_OS_BOOT +int spl_start_uboot(void) +{ + /* Break into full U-Boot on 'c' */ + if (serial_tstc() && serial_getc() == 'c') + return 1; + + return 0; +} +#endif + /* configure MX6Q/DUAL mmdc DDR io registers */ static struct mx6dq_iomux_ddr_regs mx6dq_ddr_ioregs = { .dram_sdclk_0 = IMX6DQ_DRIVE_STRENGTH, diff --git a/include/configs/pico-imx6.h b/include/configs/pico-imx6.h index 467d5ff4f5..5bbb9ea8f7 100644 --- a/include/configs/pico-imx6.h +++ b/include/configs/pico-imx6.h @@ -12,6 +12,18 @@
#include "imx6_spl.h"
+#ifdef CONFIG_SPL_OS_BOOT +/* Falcon Mode */ +#define CONFIG_SPL_FS_LOAD_ARGS_NAME "args" +#define CONFIG_SPL_FS_LOAD_KERNEL_NAME "uImage" +#define CONFIG_SYS_SPL_ARGS_ADDR 0x18000000 + +/* Falcon Mode - MMC support: args@1MB kernel@2MB */ +#define CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTOR 0x800 /* 1MB */ +#define CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTORS (CONFIG_CMD_SPL_WRITE_SIZE / 512) +#define CONFIG_SYS_MMCSD_RAW_MODE_KERNEL_SECTOR 0x1000 /* 2MB */ +#endif + /* Size of malloc() pool */ #define CONFIG_SYS_MALLOC_LEN (35 * SZ_1M) /* Increase due to DFU */