pico-imx6: Add Falcon mode

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>

pico-imx6: Add Falcon mode
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>
Fabio Estevam · Stefano Babic
1 parent 953c2500bc
Showing 2 changed files with 23 additions and 0 deletions Side-by-side Diff
board/technexion/pico-imx6/spl.c
include/configs/pico-imx6.h
@@ -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,
@@ -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 */
...	...	@@ -27,6 +27,17 @@
27	27	#define IMX6DQ_DRIVE_STRENGTH 0x30
28	28	#define IMX6SDL_DRIVE_STRENGTH 0x28
29	29
	30	+#ifdef CONFIG_SPL_OS_BOOT
	31	+int spl_start_uboot(void)
	32	+{
	33	+ /* Break into full U-Boot on 'c' */
	34	+ if (serial_tstc() && serial_getc() == 'c')
	35	+ return 1;
	36	+
	37	+ return 0;
	38	+}
	39	+#endif
	40	+
30	41	/* configure MX6Q/DUAL mmdc DDR io registers */
31	42	static struct mx6dq_iomux_ddr_regs mx6dq_ddr_ioregs = {
32	43	.dram_sdclk_0 = IMX6DQ_DRIVE_STRENGTH,
...	...	@@ -12,6 +12,18 @@
12	12
13	13	#include "imx6_spl.h"
14	14
	15	+#ifdef CONFIG_SPL_OS_BOOT
	16	+/* Falcon Mode */
	17	+#define CONFIG_SPL_FS_LOAD_ARGS_NAME "args"
	18	+#define CONFIG_SPL_FS_LOAD_KERNEL_NAME "uImage"
	19	+#define CONFIG_SYS_SPL_ARGS_ADDR 0x18000000
	20	+
	21	+/* Falcon Mode - MMC support: args@1MB kernel@2MB */
	22	+#define CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTOR 0x800 /* 1MB */
	23	+#define CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTORS (CONFIG_CMD_SPL_WRITE_SIZE / 512)
	24	+#define CONFIG_SYS_MMCSD_RAW_MODE_KERNEL_SECTOR 0x1000 /* 2MB */
	25	+#endif
	26	+
15	27	/* Size of malloc() pool */
16	28	#define CONFIG_SYS_MALLOC_LEN (35 * SZ_1M) /* Increase due to DFU */
17	29