diff options
-rw-r--r-- | arch/arm/include/asm/arch-rockchip/boot0.h | 25 | ||||
-rw-r--r-- | arch/arm/mach-rockchip/Kconfig | 28 |
2 files changed, 47 insertions, 6 deletions
diff --git a/arch/arm/include/asm/arch-rockchip/boot0.h b/arch/arm/include/asm/arch-rockchip/boot0.h index 5a1807362f..fb861d898d 100644 --- a/arch/arm/include/asm/arch-rockchip/boot0.h +++ b/arch/arm/include/asm/arch-rockchip/boot0.h @@ -20,12 +20,25 @@ * beginning of the executable. However, as we want to keep * this generic and make it applicable to builds that are like * the RK3368 (TPL needs this, SPL doesn't) or the RK3399 (no - * TPL, but extra space needed in the SPL), we simply repeat - * the 'b reset' with the expectation that the first one will - * be overwritten, if this is the first stage contained in the - * final image created with mkimage)... + * TPL, but extra space needed in the SPL), we simply insert + * a branch-to-next-instruction-word with the expectation that + * the first one may be overwritten, if this is the first stage + * contained in the final image created with mkimage)... */ - b reset /* may be overwritten --- should be 'nop' or a 'b reset' */ + b 1f /* if overwritten, entry-address is at the next word */ +1: +#endif +#if CONFIG_IS_ENABLED(ROCKCHIP_EARLYRETURN_TO_BROM) + adr r3, entry_counter + ldr r0, [r3] + cmp r0, #1 /* check if entry_counter == 1 */ + beq reset /* regular bootup */ + add r0, #1 + str r0, [r3] /* increment the entry_counter in memory */ + mov r0, #0 /* return 0 to the BROM to signal 'OK' */ + bx lr /* return control to the BROM */ +entry_counter: + .word 0 #endif b reset #if !defined(CONFIG_ARM64) @@ -33,7 +46,7 @@ * For armv7, the addr '_start' will used as vector start address * and write to VBAR register, which needs to aligned to 0x20. */ - .align(5) + .align(5), 0x0 _start: ARM_VECTORS #endif diff --git a/arch/arm/mach-rockchip/Kconfig b/arch/arm/mach-rockchip/Kconfig index 31e9864c8d..d59a1d5ccb 100644 --- a/arch/arm/mach-rockchip/Kconfig +++ b/arch/arm/mach-rockchip/Kconfig @@ -158,6 +158,34 @@ config ROCKCHIP_SPL_RESERVE_IRAM config ROCKCHIP_BROM_HELPER bool +config SPL_ROCKCHIP_EARLYRETURN_TO_BROM + bool "SPL requires early-return (for RK3188-style BROM) to BROM" + depends on SPL && ENABLE_ARM_SOC_BOOT0_HOOK + help + Some Rockchip BROM variants (e.g. on the RK3188) load the + first stage in segments and enter multiple times. E.g. on + the RK3188, the first 1KB of the first stage are loaded + first and entered; after returning to the BROM, the + remainder of the first stage is loaded, but the BROM + re-enters at the same address/to the same code as previously. + + This enables support code in the BOOT0 hook for the SPL stage + to allow multiple entries. + +config TPL_ROCKCHIP_EARLYRETURN_TO_BROM + bool "TPL requires early-return (for RK3188-style BROM) to BROM" + depends on TPL && ENABLE_ARM_SOC_BOOT0_HOOK + help + Some Rockchip BROM variants (e.g. on the RK3188) load the + first stage in segments and enter multiple times. E.g. on + the RK3188, the first 1KB of the first stage are loaded + first and entered; after returning to the BROM, the + remainder of the first stage is loaded, but the BROM + re-enters at the same address/to the same code as previously. + + This enables support code in the BOOT0 hook for the TPL stage + to allow multiple entries. + config SPL_MMC_SUPPORT default y if !SPL_ROCKCHIP_BACK_TO_BROM |