[U-Boot] [PATCH 6/7] env: ti: boot: Boot Android with dynamic partitions

[Sam Protsenko]

Changes:
  - use boot.img instead of boot_fit.img
  - use .dtb from boot.img v2
  - implement recovery boot
  - always boot ramdisk from boot.img, we can't mount system as root
    now, as system is a logical partition inside of super partition
  - don't add "skip_initramfs" to cmdline anymore
  - to boot into recovery, use boot image from recovery partition
  - prepare partition table:
    - A/B scheme
    - use 'super' partition instead of 'system' and 'vendor'
    - add dtbo partitions
    - introduce metadata partition

Not implemented: reading and applying dtbo files from dtbo partition.

Signed-off-by: Sam Protsenko <semen.protsenko at linaro.org>
---
 include/environment/ti/boot.h | 105 +++++++++++++---------------------
 1 file changed, 41 insertions(+), 64 deletions(-)

diff --git a/include/environment/ti/boot.h b/include/environment/ti/boot.h
index da99215fbd..a7644a5874 100644
--- a/include/environment/ti/boot.h
+++ b/include/environment/ti/boot.h
@@ -13,28 +13,6 @@
 #define CONSOLEDEV "ttyS2"
 #endif
 
-#define VBMETA_PART_SIZE		(64 * 1024)
-
-#if defined(CONFIG_LIBAVB)
-#define VBMETA_PART \
-	"name=vbmeta,size=" __stringify(VBMETA_PART_SIZE) \
-	",uuid=${uuid_gpt_vbmeta};"
-#else
-#define VBMETA_PART			""
-#endif
-
-#if defined(CONFIG_CMD_AB_SELECT)
-#define COMMON_PARTS \
-	"name=boot_a,size=20M,uuid=${uuid_gpt_boot_a};" \
-	"name=boot_b,size=20M,uuid=${uuid_gpt_boot_b};" \
-	"name=system_a,size=1024M,uuid=${uuid_gpt_system_a};" \
-	"name=system_b,size=1024M,uuid=${uuid_gpt_system_b};"
-#else
-#define COMMON_PARTS \
-	"name=boot,size=20M,uuid=${uuid_gpt_boot};" \
-	"name=system,size=1024M,uuid=${uuid_gpt_system};"
-#endif
-
 #ifndef PARTS_DEFAULT
 /* Define the default GPT table for eMMC */
 #define PARTS_DEFAULT \
@@ -49,10 +27,15 @@
 	"name=bootloader,size=2048K,uuid=${uuid_gpt_bootloader};" \
 	"name=uboot-env,start=2432K,size=256K,uuid=${uuid_gpt_reserved};" \
 	"name=misc,size=128K,uuid=${uuid_gpt_misc};" \
-	"name=recovery,size=40M,uuid=${uuid_gpt_recovery};" \
-	COMMON_PARTS \
-	"name=vendor,size=256M,uuid=${uuid_gpt_vendor};" \
-	VBMETA_PART \
+	"name=boot_a,size=20M,uuid=${uuid_gpt_boot_a};" \
+	"name=boot_b,size=20M,uuid=${uuid_gpt_boot_b};" \
+	"name=dtbo_a,size=8M,uuid=${uuid_gpt_dtbo_a};" \
+	"name=dtbo_b,size=8M,uuid=${uuid_gpt_dtbo_b};" \
+	"name=vbmeta_a,size=64K,uuid=${uuid_gpt_vbmeta_a};" \
+	"name=vbmeta_b,size=64K,uuid=${uuid_gpt_vbmeta_b};" \
+	"name=recovery,size=64M,uuid=${uuid_gpt_recovery};" \
+	"name=super,size=2560M,uuid=${uuid_gpt_super};" \
+	"name=metadata,size=16M,uuid=${uuid_gpt_metadata};" \
 	"name=userdata,size=-,uuid=${uuid_gpt_userdata}"
 #endif /* PARTS_DEFAULT */
 
@@ -72,7 +55,7 @@
 #define CONTROL_PARTITION "misc"
 
 #if defined(CONFIG_CMD_AB_SELECT)
-#define AB_SELECT \
+#define AB_SELECT_SLOT \
 	"if part number mmc 1 " CONTROL_PARTITION " control_part_number; " \
 	"then " \
 		"echo " CONTROL_PARTITION \
@@ -82,18 +65,12 @@
 		"echo " CONTROL_PARTITION " partition not found;" \
 		"exit;" \
 	"fi;" \
-	"setenv slot_suffix _${slot_name};" \
-	"if part number mmc ${mmcdev} system${slot_suffix} " \
-	"system_part_number; then " \
-		"setenv bootargs_ab " \
-		"ro root=/dev/mmcblk${mmcdev}p${system_part_number} " \
-		"rootwait init=/init skip_initramfs " \
-		"androidboot.slot_suffix=${slot_suffix};" \
-		"echo A/B cmdline addition: ${bootargs_ab};" \
-		"setenv bootargs ${bootargs} ${bootargs_ab};" \
-	"else " \
-		"echo system${slot_suffix} partition not found;" \
-	"fi;"
+	"setenv slot_suffix _${slot_name};"
+
+#define AB_SELECT_ARGS \
+	"setenv bootargs_ab androidboot.slot_suffix=${slot_suffix}; " \
+	"echo A/B cmdline addition: ${bootargs_ab};" \
+	"setenv bootargs ${bootargs} ${bootargs_ab};"
 #else
 #define AB_SELECT ""
 #endif
@@ -121,46 +98,46 @@
 		"setenv mmcroot /dev/mmcblk0p2 rw; " \
 		"run mmcboot;\0" \
 	"emmc_android_boot=" \
+		"setenv mmcdev 1; " \
+		"mmc dev $mmcdev; " \
+		"mmc rescan; " \
+		AB_SELECT_SLOT \
 		"if bcb load " __stringify(CONFIG_FASTBOOT_FLASH_MMC_DEV) " " \
 		CONTROL_PARTITION "; then " \
+			"setenv ardaddr -; " \
 			"if bcb test command = bootonce-bootloader; then " \
-				"echo BCB: Bootloader boot...; " \
+				"echo Android: Bootloader boot...; " \
 				"bcb clear command; bcb store; " \
 				FASTBOOT_CMD \
+				"exit; " \
 			"elif bcb test command = boot-recovery; then " \
-				"echo BCB: Recovery boot...; " \
-				"echo Warning: recovery is not implemented; " \
-				"echo Performing normal boot for now...; " \
-				"bcb clear command; bcb store; " \
-				"run emmc_android_normal_boot; " \
+				"echo Android: Recovery boot...; " \
+				"setenv ardaddr $loadaddr;" \
+				"setenv apart recovery; " \
 			"else " \
-				"echo BCB: Normal boot requested...; " \
-				"run emmc_android_normal_boot; " \
+				"echo Android: Normal boot...; " \
+				"setenv ardaddr $loadaddr; " \
+				"setenv apart boot${slot_suffix}; " \
 			"fi; " \
 		"else " \
 			"echo Warning: BCB is corrupted or does not exist; " \
-			"echo Performing normal boot...; " \
-			"run emmc_android_normal_boot; " \
-		"fi;\0" \
-	"emmc_android_normal_boot=" \
-		"echo Trying to boot Android from eMMC ...; " \
-		"run update_to_fit; " \
+			"echo Android: Normal boot...; " \
+		"fi; " \
 		"setenv eval_bootargs setenv bootargs $bootargs; " \
 		"run eval_bootargs; " \
-		"setenv mmcdev 1; " \
 		"setenv machid fe6; " \
-		"mmc dev $mmcdev; " \
-		"mmc rescan; " \
 		AVB_VERIFY_CHECK \
-		AB_SELECT \
-		"if part start mmc ${mmcdev} boot${slot_suffix} boot_start; " \
-		"then " \
-			"part size mmc ${mmcdev} boot${slot_suffix} " \
-				"boot_size; " \
-			"mmc read ${loadaddr} ${boot_start} ${boot_size}; " \
-			"bootm ${loadaddr}#${fdtfile}; " \
+		AB_SELECT_ARGS \
+		"if part start mmc $mmcdev $apart boot_start; then " \
+			"part size mmc $mmcdev $apart boot_size; " \
+			"mmc read $loadaddr $boot_start $boot_size; " \
+			"bootimg get_dtb_file 0 dtb_start dtb_size; " \
+			"cp.b $dtb_start $fdtaddr $dtb_size; " \
+			"fdt addr $fdtaddr; " \
+			"bootm $loadaddr $ardaddr $fdtaddr; " \
 		"else " \
-			"echo boot${slot_suffix} partition not found; " \
+			"echo $apart partition not found; " \
+			"exit; " \
 		"fi;\0"
 
 #ifdef CONFIG_OMAP54XX
-- 
2.23.0