Kconfigs: Correct default of "0" on hex type entries

It is not a parse error to have a default value of "0" for a "hex" type entry, instead of "0x0". However, "0" and "0x0" are not treated the same even by the tools themselves. Correct this by changing the default value from "0" to "0x0" for all hex type questions that had the incorrect default. Fix one instance (in two configs) of a default of "0" being used on a hex question to be "0x0". Remove the cases where a defconfig had set a value of "0x0" to be used as the default had been "0". Signed-off-by: Tom Rini <[email protected]> Reviewed-by: Simon Glass <[email protected]>
matwey · Aug 9, 2023 · a077ac1 · a077ac1
1 parent 1e1437d
commit a077ac1
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Showing 47 changed files with 38 additions and 64 deletions.
diff --git a/arch/arm/cpu/armv7/ls102xa/Kconfig b/arch/arm/cpu/armv7/ls102xa/Kconfig
@@ -98,7 +98,6 @@ config SYS_FSL_ERRATUM_A008407
 
 config SYS_FSL_QSPI_SKIP_CLKSEL
 	bool "Skip setting QSPI clock during SoC init"
-	default 0
 	help
 	   To improve startup times when booting from QSPI flash, the QSPI
 	   frequency can be set very early in the boot process. If this option

diff --git a/arch/arm/cpu/armv8/fsl-layerscape/Kconfig b/arch/arm/cpu/armv8/fsl-layerscape/Kconfig
@@ -739,7 +739,7 @@ config HAS_FSL_XHCI_USB
 config SYS_FSL_BOOTROM_BASE
 	hex
 	depends on FSL_LSCH2
-	default 0
+	default 0x0
 
 config SYS_FSL_BOOTROM_SIZE
 	hex

diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
@@ -181,7 +181,7 @@ config IMX8_ROMAPI
 config SPL_IMX_ROMAPI_LOADADDR
 	hex "Default load address to load image through ROM API"
 	depends on IMX8_ROMAPI || SPL_BOOTROM_SUPPORT
-	default 0
+	default 0x0
 
 config IMX_DCD_ADDR
 	hex "DCD Blocks location on the image"

diff --git a/arch/arm/mach-imx/imx8/Kconfig b/arch/arm/mach-imx/imx8/Kconfig
@@ -34,11 +34,11 @@ config SYS_SOC
 
 config BOOTAUX_RESERVED_MEM_BASE
 	hex "i.MX auxiliary core dram memory base"
-	default 0
+	default 0x0
 
 config BOOTAUX_RESERVED_MEM_SIZE
 	hex "i.MX auxiliary core dram memory size"
-	default 0
+	default 0x0
 
 choice
 	prompt "i.MX8 board select"

diff --git a/arch/arm/mach-rockchip/Kconfig b/arch/arm/mach-rockchip/Kconfig
@@ -469,7 +469,7 @@ config ROCKCHIP_STIMER_BASE
 
 config ROCKCHIP_SPL_RESERVE_IRAM
 	hex "Size of IRAM reserved in SPL"
-	default 0
+	default 0x0
 	help
 	  SPL may need reserve memory for firmware loaded by SPL, whose load
 	  address is in IRAM and may overlay with SPL text area if not

diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig
@@ -568,7 +568,7 @@ config DRAM_EMR1
 
 config DRAM_TPR3
 	hex "sunxi dram tpr3 value"
-	default 0
+	default 0x0
 	---help---
 	Set the dram controller tpr3 parameter. This parameter configures
 	the delay on the command lane and also phase shifts, which are
@@ -579,7 +579,7 @@ config DRAM_TPR3
 
 config DRAM_DQS_GATING_DELAY
 	hex "sunxi dram dqs_gating_delay value"
-	default 0
+	default 0x0
 	---help---
 	Set the dram controller dqs_gating_delay parmeter. Each byte
 	encodes the DQS gating delay for each byte lane. The delay

diff --git a/arch/powerpc/cpu/mpc8xx/Kconfig b/arch/powerpc/cpu/mpc8xx/Kconfig
@@ -94,7 +94,7 @@ config SYS_SIUMCR
 
 config SYS_SYPCR
 	hex "SYPCR register" if !WDT_MPC8xxx
-	default 0
+	default 0x0
 	help
 	  System Protection Control (11-9)
 

diff --git a/boot/Kconfig b/boot/Kconfig
@@ -1007,7 +1007,7 @@ config BOOTSTAGE_STASH
 
 config BOOTSTAGE_STASH_ADDR
 	hex "Address to stash boot timing information"
-	default 0
+	default 0x0
 	help
 	  Provide an address which will not be overwritten by the OS when it
 	  starts, so that it can read this information when ready.

diff --git a/cmd/Kconfig b/cmd/Kconfig
@@ -517,7 +517,7 @@ config CMD_SPL
 config CMD_SPL_NAND_OFS
 	hex "Offset of OS args or dtb for Falcon-mode NAND boot"
 	depends on CMD_SPL && (TPL_NAND_SUPPORT || SPL_NAND_SUPPORT)
-	default 0
+	default 0x0
 	help
 	  This provides the offset of the command line arguments for Linux
 	  when booting from NAND in Falcon mode.  See doc/README.falcon
@@ -527,7 +527,7 @@ config CMD_SPL_NAND_OFS
 config CMD_SPL_NOR_OFS
 	hex "Offset of OS args or dtb for Falcon-mode NOR boot"
 	depends on CMD_SPL && SPL_NOR_SUPPORT
-	default 0
+	default 0x0
 	help
 	  This provides the offset of the command line arguments or dtb for
 	  Linux when booting from NOR in Falcon mode.
@@ -1514,7 +1514,7 @@ config DEFAULT_SPI_BUS
 config DEFAULT_SPI_MODE
 	hex "default spi mode used by sspi command (see include/spi.h)"
 	depends on CMD_SPI
-	default 0
+	default 0x0
 
 config CMD_TEMPERATURE
 	bool "temperature - display the temperature from thermal sensors"
@@ -1805,7 +1805,7 @@ config BOOTP_PXE_CLIENTARCH
 	depends on BOOTP_PXE
 	default 0x16 if ARM64
 	default 0x15 if ARM
-	default 0 if X86
+	default 0x0 if X86
 
 config BOOTP_VCI_STRING
 	string

diff --git a/common/Kconfig b/common/Kconfig
@@ -1031,7 +1031,7 @@ config BLOBLIST_SIZE
 config BLOBLIST_SIZE_RELOC
 	hex "Size of bloblist after relocation"
 	default BLOBLIST_SIZE if BLOBLIST_FIXED || BLOBLIST_ALLOC
-	default 0 if BLOBLIST_PASSAGE
+	default 0x0 if BLOBLIST_PASSAGE
 	help
 	  Sets the size of the bloblist in bytes after relocation. Since U-Boot
 	  has a lot more memory available then, it is possible to use a larger

diff --git a/common/spl/Kconfig b/common/spl/Kconfig
@@ -67,7 +67,7 @@ config SPL_SIZE_LIMIT_SUBTRACT_MALLOC
 config SPL_SIZE_LIMIT_PROVIDE_STACK
 	hex "SPL image size check: provide stack space before relocation"
 	depends on SPL_SIZE_LIMIT > 0
-	default 0
+	default 0x0
 	help
 	  If set, this size is reserved in SPL_SIZE_LIMIT check to ensure such
 	  an image does not overflow SRAM if SPL_SIZE_LIMIT describes the size

diff --git a/common/spl/Kconfig.tpl b/common/spl/Kconfig.tpl
@@ -126,7 +126,7 @@ config TPL_POWER
 
 config TPL_TEXT_BASE
 	hex "Base address for the .text section of the TPL stage"
-	default 0
+	default 0x0
 	help
 	  The base address for the .text section of the TPL stage.
 

diff --git a/configs/am335x_guardian_defconfig b/configs/am335x_guardian_defconfig
@@ -17,7 +17,6 @@ CONFIG_SPL_SERIAL=y
 CONFIG_SPL_DRIVERS_MISC=y
 CONFIG_BOOTCOUNT_BOOTLIMIT=3
 CONFIG_SPL=y
-CONFIG_BOOTSTAGE_STASH_ADDR=0x0
 CONFIG_ENV_OFFSET_REDUND=0x540000
 CONFIG_SPL_LIBDISK_SUPPORT=y
 CONFIG_SYS_MEMTEST_START=0x80000000

diff --git a/configs/efi-x86_app32_defconfig b/configs/efi-x86_app32_defconfig
@@ -2,7 +2,7 @@ CONFIG_X86=y
 CONFIG_NR_DRAM_BANKS=8
 CONFIG_ENV_SIZE=0x1000
 CONFIG_DEFAULT_DEVICE_TREE="efi-x86_app"
-CONFIG_DEBUG_UART_BASE=0
+CONFIG_DEBUG_UART_BASE=0x0
 CONFIG_DEBUG_UART_CLOCK=0
 CONFIG_VENDOR_EFI=y
 CONFIG_TARGET_EFI_APP32=y

diff --git a/configs/efi-x86_app64_defconfig b/configs/efi-x86_app64_defconfig
@@ -2,7 +2,7 @@ CONFIG_X86=y
 CONFIG_NR_DRAM_BANKS=8
 CONFIG_ENV_SIZE=0x1000
 CONFIG_DEFAULT_DEVICE_TREE="efi-x86_app"
-CONFIG_DEBUG_UART_BASE=0
+CONFIG_DEBUG_UART_BASE=0x0
 CONFIG_DEBUG_UART_CLOCK=0
 CONFIG_X86_RUN_64BIT=y
 CONFIG_VENDOR_EFI=y

diff --git a/configs/evb-rk3229_defconfig b/configs/evb-rk3229_defconfig
@@ -12,7 +12,6 @@ CONFIG_ENV_OFFSET=0x3F8000
 CONFIG_DEFAULT_DEVICE_TREE="rk3229-evb"
 CONFIG_SPL_TEXT_BASE=0x60000000
 CONFIG_ROCKCHIP_RK322X=y
-CONFIG_ROCKCHIP_SPL_RESERVE_IRAM=0x0
 CONFIG_TARGET_EVB_RK3229=y
 CONFIG_SPL_STACK_R_ADDR=0x60600000
 CONFIG_DEBUG_UART_BASE=0x11030000

diff --git a/configs/evb-rk3308_defconfig b/configs/evb-rk3308_defconfig
@@ -11,7 +11,6 @@ CONFIG_CUSTOM_SYS_INIT_SP_ADDR=0x800000
 CONFIG_DEFAULT_DEVICE_TREE="rk3308-evb"
 CONFIG_DM_RESET=y
 CONFIG_ROCKCHIP_RK3308=y
-CONFIG_ROCKCHIP_SPL_RESERVE_IRAM=0x0
 CONFIG_SPL_DRIVERS_MISC=y
 CONFIG_TARGET_EVB_RK3308=y
 CONFIG_SPL_STACK_R_ADDR=0xc00000

diff --git a/configs/imx6q_logic_defconfig b/configs/imx6q_logic_defconfig
@@ -86,7 +86,6 @@ CONFIG_LED=y
 CONFIG_LED_GPIO=y
 CONFIG_MISC=y
 CONFIG_I2C_EEPROM=y
-CONFIG_SYS_I2C_EEPROM_ADDR=0x0
 CONFIG_FSL_USDHC=y
 CONFIG_MTD=y
 CONFIG_DM_MTD=y

diff --git a/configs/imx8mm_data_modul_edm_sbc_defconfig b/configs/imx8mm_data_modul_edm_sbc_defconfig
@@ -233,6 +233,5 @@ CONFIG_USB_GADGET_MANUFACTURER="Data Modul"
 CONFIG_USB_GADGET_VENDOR_NUM=0x0525
 CONFIG_USB_GADGET_PRODUCT_NUM=0xa4a5
 CONFIG_CI_UDC=y
-CONFIG_SDP_LOADADDR=0x0
 CONFIG_USB_FUNCTION_ACM=y
 CONFIG_IMX_WATCHDOG=y
diff --git a/configs/imx8mn_beacon_2g_defconfig b/configs/imx8mn_beacon_2g_defconfig
@@ -142,4 +142,3 @@ CONFIG_USB_GADGET_MANUFACTURER="FSL"
 CONFIG_USB_GADGET_VENDOR_NUM=0x0525
 CONFIG_USB_GADGET_PRODUCT_NUM=0xa4a5
 CONFIG_CI_UDC=y
-CONFIG_SDP_LOADADDR=0x0
diff --git a/configs/imx8mn_beacon_defconfig b/configs/imx8mn_beacon_defconfig
@@ -149,5 +149,4 @@ CONFIG_USB_GADGET_MANUFACTURER="FSL"
 CONFIG_USB_GADGET_VENDOR_NUM=0x0525
 CONFIG_USB_GADGET_PRODUCT_NUM=0xa4a5
 CONFIG_CI_UDC=y
-CONFIG_SDP_LOADADDR=0x0
 CONFIG_IMX_WATCHDOG=y
diff --git a/configs/imx8mn_beacon_fspi_defconfig b/configs/imx8mn_beacon_fspi_defconfig
@@ -149,7 +149,6 @@ CONFIG_USB_GADGET_MANUFACTURER="FSL"
 CONFIG_USB_GADGET_VENDOR_NUM=0x0525
 CONFIG_USB_GADGET_PRODUCT_NUM=0xa4a5
 CONFIG_CI_UDC=y
-CONFIG_SDP_LOADADDR=0x0
 CONFIG_IMX_WATCHDOG=y
 CONFIG_FSPI_CONF_HEADER=y
 CONFIG_FSPI_CONF_FILE="fspi_header.bin"
diff --git a/configs/imx8mp_beacon_defconfig b/configs/imx8mp_beacon_defconfig
@@ -172,7 +172,6 @@ CONFIG_USB_GADGET=y
 CONFIG_USB_GADGET_MANUFACTURER="FSL"
 CONFIG_USB_GADGET_VENDOR_NUM=0x1fc9
 CONFIG_USB_GADGET_PRODUCT_NUM=0x0152
-CONFIG_SDP_LOADADDR=0x0
 CONFIG_USB_FUNCTION_ACM=y
 CONFIG_USB_ETHER=y
 CONFIG_USB_ETH_CDC=y

diff --git a/configs/imx8mp_data_modul_edm_sbc_defconfig b/configs/imx8mp_data_modul_edm_sbc_defconfig
@@ -257,7 +257,6 @@ CONFIG_USB_GADGET=y
 CONFIG_USB_GADGET_MANUFACTURER="Data Modul"
 CONFIG_USB_GADGET_VENDOR_NUM=0x0525
 CONFIG_USB_GADGET_PRODUCT_NUM=0xa4a5
-CONFIG_SDP_LOADADDR=0x0
 CONFIG_USB_FUNCTION_ACM=y
 CONFIG_USB_ETHER=y
 CONFIG_USB_ETH_CDC=y

diff --git a/configs/imx8mp_dhcom_pdk2_defconfig b/configs/imx8mp_dhcom_pdk2_defconfig
@@ -255,7 +255,6 @@ CONFIG_USB_GADGET=y
 CONFIG_USB_GADGET_MANUFACTURER="DH electronics"
 CONFIG_USB_GADGET_VENDOR_NUM=0x0525
 CONFIG_USB_GADGET_PRODUCT_NUM=0xa4a5
-CONFIG_SDP_LOADADDR=0x0
 CONFIG_USB_FUNCTION_ACM=y
 CONFIG_USB_ETHER=y
 CONFIG_USB_ETH_CDC=y

diff --git a/configs/imx8mp_dhcom_pdk3_defconfig b/configs/imx8mp_dhcom_pdk3_defconfig
@@ -258,7 +258,6 @@ CONFIG_USB_GADGET=y
 CONFIG_USB_GADGET_MANUFACTURER="DH electronics"
 CONFIG_USB_GADGET_VENDOR_NUM=0x0525
 CONFIG_USB_GADGET_PRODUCT_NUM=0xa4a5
-CONFIG_SDP_LOADADDR=0x0
 CONFIG_USB_FUNCTION_ACM=y
 CONFIG_USB_ETHER=y
 CONFIG_USB_ETH_CDC=y

diff --git a/configs/kontron_sl28_defconfig b/configs/kontron_sl28_defconfig
@@ -20,7 +20,6 @@ CONFIG_SPL_MMC=y
 CONFIG_SPL_SERIAL=y
 CONFIG_SPL_STACK=0x18009ff0
 CONFIG_SPL_SIZE_LIMIT=0x20000
-CONFIG_SPL_SIZE_LIMIT_PROVIDE_STACK=0x0
 CONFIG_SPL=y
 CONFIG_ENV_OFFSET_REDUND=0x3f0000
 CONFIG_SPL_SPI_FLASH_SUPPORT=y
@@ -130,7 +129,6 @@ CONFIG_USB_GADGET_DOWNLOAD=y
 CONFIG_WDT=y
 CONFIG_WDT_SL28CPLD=y
 CONFIG_WDT_SP805=y
-CONFIG_OF_LIBFDT_ASSUME_MASK=0x0
 CONFIG_EFI_SET_TIME=y
 CONFIG_EFI_RUNTIME_UPDATE_CAPSULE=y
 CONFIG_EFI_CAPSULE_FIRMWARE_FIT=y
diff --git a/configs/lion-rk3368_defconfig b/configs/lion-rk3368_defconfig
@@ -10,7 +10,6 @@ CONFIG_ENV_OFFSET=0x3F8000
 CONFIG_DEFAULT_DEVICE_TREE="rk3368-lion-haikou"
 CONFIG_SPL_TEXT_BASE=0x00000000
 CONFIG_ROCKCHIP_RK3368=y
-CONFIG_ROCKCHIP_SPL_RESERVE_IRAM=0x0
 CONFIG_TPL_LIBCOMMON_SUPPORT=y
 CONFIG_TPL_LIBGENERIC_SUPPORT=y
 CONFIG_SPL_DRIVERS_MISC=y

diff --git a/configs/roc-cc-rk3308_defconfig b/configs/roc-cc-rk3308_defconfig
@@ -11,7 +11,6 @@ CONFIG_CUSTOM_SYS_INIT_SP_ADDR=0x800000
 CONFIG_DEFAULT_DEVICE_TREE="rk3308-roc-cc"
 CONFIG_DM_RESET=y
 CONFIG_ROCKCHIP_RK3308=y
-CONFIG_ROCKCHIP_SPL_RESERVE_IRAM=0x0
 CONFIG_SPL_DRIVERS_MISC=y
 CONFIG_TARGET_ROC_RK3308_CC=y
 CONFIG_SPL_STACK_R_ADDR=0xc00000

diff --git a/configs/rock-pi-s-rk3308_defconfig b/configs/rock-pi-s-rk3308_defconfig
@@ -11,7 +11,6 @@ CONFIG_CUSTOM_SYS_INIT_SP_ADDR=0x800000
 CONFIG_DEFAULT_DEVICE_TREE="rk3308-rock-pi-s"
 CONFIG_DM_RESET=y
 CONFIG_ROCKCHIP_RK3308=y
-CONFIG_ROCKCHIP_SPL_RESERVE_IRAM=0x0
 CONFIG_SPL_DRIVERS_MISC=y
 CONFIG_TARGET_EVB_RK3308=y
 CONFIG_SPL_STACK_R_ADDR=0xc00000

diff --git a/configs/sandbox64_defconfig b/configs/sandbox64_defconfig
@@ -4,7 +4,6 @@ CONFIG_ENV_SIZE=0x2000
 CONFIG_DEFAULT_DEVICE_TREE="sandbox64"
 CONFIG_DM_RESET=y
 CONFIG_PRE_CON_BUF_ADDR=0x100000
-CONFIG_BOOTSTAGE_STASH_ADDR=0x0
 CONFIG_SYS_LOAD_ADDR=0x0
 CONFIG_PCI=y
 CONFIG_SANDBOX64=y

diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
@@ -4,7 +4,6 @@ CONFIG_ENV_SIZE=0x2000
 CONFIG_DEFAULT_DEVICE_TREE="sandbox"
 CONFIG_DM_RESET=y
 CONFIG_PRE_CON_BUF_ADDR=0xf0000
-CONFIG_BOOTSTAGE_STASH_ADDR=0x0
 CONFIG_SYS_LOAD_ADDR=0x0
 CONFIG_PCI=y
 CONFIG_DEBUG_UART=y

diff --git a/configs/sandbox_flattree_defconfig b/configs/sandbox_flattree_defconfig
@@ -3,7 +3,6 @@ CONFIG_NR_DRAM_BANKS=1
 CONFIG_ENV_SIZE=0x2000
 CONFIG_DEFAULT_DEVICE_TREE="sandbox"
 CONFIG_DM_RESET=y
-CONFIG_BOOTSTAGE_STASH_ADDR=0x0
 CONFIG_SYS_LOAD_ADDR=0x0
 CONFIG_PCI=y
 CONFIG_DEBUG_UART=y

diff --git a/configs/sandbox_noinst_defconfig b/configs/sandbox_noinst_defconfig
@@ -10,7 +10,6 @@ CONFIG_SPL_SERIAL=y
 CONFIG_SPL_DRIVERS_MISC=y
 CONFIG_SPL_SYS_MALLOC_F_LEN=0x8000
 CONFIG_SPL=y
-CONFIG_BOOTSTAGE_STASH_ADDR=0x0
 CONFIG_SYS_LOAD_ADDR=0x0
 CONFIG_PCI=y
 CONFIG_SANDBOX_SPL=y

diff --git a/configs/sandbox_spl_defconfig b/configs/sandbox_spl_defconfig
@@ -10,7 +10,6 @@ CONFIG_SPL_SERIAL=y
 CONFIG_SPL_DRIVERS_MISC=y
 CONFIG_SPL_SYS_MALLOC_F_LEN=0x8000
 CONFIG_SPL=y
-CONFIG_BOOTSTAGE_STASH_ADDR=0x0
 CONFIG_SYS_LOAD_ADDR=0x0
 CONFIG_PCI=y
 CONFIG_SANDBOX_SPL=y

diff --git a/configs/sandbox_vpl_defconfig b/configs/sandbox_vpl_defconfig
@@ -15,7 +15,6 @@ CONFIG_TPL_SERIAL=y
 CONFIG_SPL_DRIVERS_MISC=y
 CONFIG_SPL_SYS_MALLOC_F_LEN=0x8000
 CONFIG_SPL=y
-CONFIG_BOOTSTAGE_STASH_ADDR=0x0
 CONFIG_SYS_LOAD_ADDR=0x0
 CONFIG_PCI=y
 CONFIG_SANDBOX_SPL=y

diff --git a/configs/xilinx_versal_net_virt_defconfig b/configs/xilinx_versal_net_virt_defconfig
@@ -77,7 +77,6 @@ CONFIG_DM_MAILBOX=y
 CONFIG_ZYNQMP_IPI=y
 CONFIG_MISC=y
 CONFIG_I2C_EEPROM=y
-CONFIG_SYS_I2C_EEPROM_ADDR=0x0
 CONFIG_SUPPORT_EMMC_BOOT=y
 CONFIG_MMC_IO_VOLTAGE=y
 CONFIG_MMC_UHS_SUPPORT=y

diff --git a/configs/xilinx_zynqmp_virt_defconfig b/configs/xilinx_zynqmp_virt_defconfig
@@ -11,7 +11,6 @@ CONFIG_DM_RESET=y
 CONFIG_SPL_STACK_R_ADDR=0x18000000
 CONFIG_SPL_STACK=0xfffffffc
 CONFIG_SPL_SIZE_LIMIT=0x2a000
-CONFIG_SPL_SIZE_LIMIT_PROVIDE_STACK=0x0
 CONFIG_SPL=y
 CONFIG_ENV_OFFSET_REDUND=0x1E80000
 CONFIG_SPL_SPI_FLASH_SUPPORT=y

diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig
@@ -167,7 +167,7 @@ config SYS_IDE_MAXDEVICE
 
 config SYS_ATA_BASE_ADDR
 	hex "Base address of IDE controller"
-	default 0
+	default 0x0
 	help
 	  This is the address of the IDE controller, from which other addresses
 	  are calculated. Each bus is at a fixed offset from this address,

diff --git a/drivers/fastboot/Kconfig b/drivers/fastboot/Kconfig
@@ -56,7 +56,7 @@ config FASTBOOT_BUF_ADDR
 				ROCKCHIP_RK3399
 	default 0x280000 if ROCKCHIP_RK3368
 	default 0x100000 if ARCH_ZYNQMP
-	default 0 if SANDBOX
+	default 0x0 if SANDBOX
 	help
 	  The fastboot protocol requires a large memory buffer for
 	  downloads. Define this to the starting RAM address to use for