diff options
| -rw-r--r-- | Makefile | 12 | ||||
| -rw-r--r-- | arch/arm/mach-mvebu/Kconfig | 10 | ||||
| -rw-r--r-- | arch/arm/mach-mvebu/include/mach/cpu.h | 2 | ||||
| -rw-r--r-- | arch/arm/mach-mvebu/include/mach/soc.h | 2 | ||||
| -rw-r--r-- | arch/arm/mach-mvebu/lowlevel_spl.S | 16 | ||||
| -rw-r--r-- | arch/arm/mach-mvebu/spl.c | 25 |
6 files changed, 65 insertions, 2 deletions
@@ -901,7 +901,7 @@ MKIMAGEFLAGS_u-boot.kwb = -n $(srctree)/$(CONFIG_SYS_KWD_CONFIG:"%"=%) \ -T kwbimage -a $(CONFIG_SYS_TEXT_BASE) -e $(CONFIG_SYS_TEXT_BASE) MKIMAGEFLAGS_u-boot-spl.kwb = -n $(srctree)/$(CONFIG_SYS_KWD_CONFIG:"%"=%) \ - -T kwbimage -a $(CONFIG_SPL_TEXT_BASE) -e $(CONFIG_SPL_TEXT_BASE) + -T kwbimage -a $(CONFIG_SYS_TEXT_BASE) -e $(CONFIG_SYS_TEXT_BASE) MKIMAGEFLAGS_u-boot.pbl = -n $(srctree)/$(CONFIG_SYS_FSL_PBL_RCW:"%"=%) \ -R $(srctree)/$(CONFIG_SYS_FSL_PBL_PBI:"%"=%) -T pblimage @@ -909,8 +909,18 @@ MKIMAGEFLAGS_u-boot.pbl = -n $(srctree)/$(CONFIG_SYS_FSL_PBL_RCW:"%"=%) \ u-boot.img u-boot.kwb u-boot.pbl: u-boot.bin FORCE $(call if_changed,mkimage) +# If the kwboot xmodem protocol is used, to boot U-Boot on the MVEBU +# SoC's, the SPL U-Boot returns to the BootROM after it completes +# the SDRAM setup. The BootROM expects no U-Boot header in the main +# U-Boot image. So we need to combine SPL and u-boot.bin instead of +# u-boot.img in this case. +ifdef CONFIG_MVEBU_BOOTROM_UARTBOOT +u-boot-spl.kwb: u-boot.bin spl/u-boot-spl.bin FORCE + $(call if_changed,mkimage) +else u-boot-spl.kwb: u-boot.img spl/u-boot-spl.bin FORCE $(call if_changed,mkimage) +endif MKIMAGEFLAGS_u-boot-dtb.img = $(MKIMAGEFLAGS_u-boot.img) diff --git a/arch/arm/mach-mvebu/Kconfig b/arch/arm/mach-mvebu/Kconfig index 1aa9640..79ff0e8 100644 --- a/arch/arm/mach-mvebu/Kconfig +++ b/arch/arm/mach-mvebu/Kconfig @@ -18,4 +18,14 @@ endchoice config SYS_SOC default "mvebu" +config MVEBU_BOOTROM_UARTBOOT + bool "Use kwboot to boot via BootROM xmodem protocol" + help + This option provides support for booting via the Marvell + xmodem protocol, used by the kwboot tool. + + Please don't forget to configure the boot device in + the board specific kwbimage.cfg file this way: + BOOT_FROM uart + endif diff --git a/arch/arm/mach-mvebu/include/mach/cpu.h b/arch/arm/mach-mvebu/include/mach/cpu.h index 6fa4173..5e8bf0c 100644 --- a/arch/arm/mach-mvebu/include/mach/cpu.h +++ b/arch/arm/mach-mvebu/include/mach/cpu.h @@ -119,6 +119,8 @@ int mvebu_mbus_probe(struct mbus_win windows[], int count); int mvebu_soc_family(void); u32 mvebu_get_nand_clock(void); +void return_to_bootrom(void); + int mv_sdh_init(unsigned long regbase, u32 max_clk, u32 min_clk, u32 quirks); /* diff --git a/arch/arm/mach-mvebu/include/mach/soc.h b/arch/arm/mach-mvebu/include/mach/soc.h index 02c21bc..22abde0 100644 --- a/arch/arm/mach-mvebu/include/mach/soc.h +++ b/arch/arm/mach-mvebu/include/mach/soc.h @@ -31,7 +31,7 @@ /* SOC specific definations */ #define INTREG_BASE 0xd0000000 #define INTREG_BASE_ADDR_REG (INTREG_BASE + 0x20080) -#if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SYS_MVEBU_DDR_A38X) +#if defined(CONFIG_SPL_BUILD) /* * On A38x switching the regs base address without running from * SDRAM doesn't seem to work. So let the SPL still use the diff --git a/arch/arm/mach-mvebu/lowlevel_spl.S b/arch/arm/mach-mvebu/lowlevel_spl.S index 69da7fe..2e2181e 100644 --- a/arch/arm/mach-mvebu/lowlevel_spl.S +++ b/arch/arm/mach-mvebu/lowlevel_spl.S @@ -5,10 +5,26 @@ #include <config.h> #include <linux/linkage.h> +#ifdef CONFIG_MVEBU_BOOTROM_UARTBOOT ENTRY(save_boot_params) + stmfd sp!, {r0 - r12, lr} /* @ save registers on stack */ + ldr r12, =CONFIG_SPL_BOOTROM_SAVE + str sp, [r12] b save_boot_params_ret ENDPROC(save_boot_params) +ENTRY(return_to_bootrom) + ldr r12, =CONFIG_SPL_BOOTROM_SAVE + ldr sp, [r12] + mov r0, #0x0 /* @ return value: 0x0 NO_ERR */ + ldmfd sp!, {r0 - r12, pc} /* @ restore regs and return */ +ENDPROC(return_to_bootrom) +#else +ENTRY(save_boot_params) + b save_boot_params_ret +ENDPROC(save_boot_params) +#endif + /* * cache_inv - invalidate Cache line * r0 - dest diff --git a/arch/arm/mach-mvebu/spl.c b/arch/arm/mach-mvebu/spl.c index af61ded..26ff1a2 100644 --- a/arch/arm/mach-mvebu/spl.c +++ b/arch/arm/mach-mvebu/spl.c @@ -34,8 +34,18 @@ void board_init_f(ulong dummy) /* Set global data pointer */ gd = &gdata; +#ifndef CONFIG_MVEBU_BOOTROM_UARTBOOT + /* + * Only call arch_cpu_init() when not returning to the + * Marvell BootROM, which is done when booting via + * the xmodem protocol (kwboot tool). Otherwise the + * internal register will get remapped and the BootROM + * can't continue to run correctly. + */ + /* Linux expects the internal registers to be at 0xf1000000 */ arch_cpu_init(); +#endif /* * Pin muxing needs to be done before UART output, since @@ -54,5 +64,20 @@ void board_init_f(ulong dummy) /* Setup DDR */ ddr3_init(); +#ifdef CONFIG_MVEBU_BOOTROM_UARTBOOT + /* + * Return to the BootROM to continue the Marvell xmodem + * UART boot protocol. As initiated by the kwboot tool. + * + * This can only be done by the BootROM and not by the + * U-Boot SPL infrastructure, since the beginning of the + * image is already read and interpreted by the BootROM. + * SPL has no chance to receive this information. So we + * need to return to the BootROM to enable this xmodem + * UART download. + */ + return_to_bootrom(); +#endif + board_init_r(NULL, 0); } |