diff options
Diffstat (limited to 'arch/arm/include/asm')
| -rw-r--r-- | arch/arm/include/asm/arch-rk3066/boot0.h | 77 |
1 files changed, 76 insertions, 1 deletions
diff --git a/arch/arm/include/asm/arch-rk3066/boot0.h b/arch/arm/include/asm/arch-rk3066/boot0.h index 28c0fb9a4c..6bf3828c84 100644 --- a/arch/arm/include/asm/arch-rk3066/boot0.h +++ b/arch/arm/include/asm/arch-rk3066/boot0.h @@ -3,6 +3,81 @@ #ifndef __ASM_ARCH_BOOT0_H__ #define __ASM_ARCH_BOOT0_H__ -#include <asm/arch-rockchip/boot0.h> +#include <asm/arch-rockchip/boot_mode.h> +/* + * Execution starts on the instruction following this 4-byte header + * (containing the magic 'RK30'). This magic constant will be written into + * the final image by the rkimage tool, but we need to reserve space for it here. + */ +#ifdef CONFIG_SPL_BUILD + b 1f /* if overwritten, entry-address is at the next word */ +1: +#endif + +#if CONFIG_IS_ENABLED(ROCKCHIP_EARLYRETURN_TO_BROM) +/* + * Keep track of the re-entries with help of the lr register. + * This binary can be re-used and called from various BROM functions. + * Only when it's called from the part that handles SPI, NAND or EMMC + * hardware it needs to early return to BROM ones. + * In download mode when it handles data on USB OTG and UART0 + * this section must be skipped. + */ + ldr r3, =CONFIG_ROCKCHIP_BOOT_LR_REG + cmp lr, r3 /* if (LR != CONFIG_ROCKCHIP_BOOT_LR_REG) */ + bne reset /* goto reset; */ +/* + * Unlike newer Rockchip SoC models the rk3066 BROM code does not have built-in + * support to enter download mode on return to BROM. This binary must check + * the boot mode register for the BOOT_BROM_DOWNLOAD flag and reset if it's set. + * It then returns to BROM to the end of the function that reads boot blocks. + * From there the BROM code goes into a download mode and waits for data + * on USB OTG and UART0. + */ + ldr r2, =BOOT_BROM_DOWNLOAD + ldr r3, =CONFIG_ROCKCHIP_BOOT_MODE_REG + ldr r0, [r3] /* if (readl(CONFIG_ROCKCHIP_BOOT_MODE_REG) != */ + cmp r0, r2 /* BOOT_BROM_DOWNLOAD) { */ + bne early_return /* goto early_return; */ + /* } else { */ + mov r0, #0 + str r0, [r3] /* writel(0, CONFIG_ROCKCHIP_BOOT_MODE_REG); */ + + ldr r3, =CONFIG_ROCKCHIP_BOOT_RETURN_REG + bx r3 /* return to CONFIG_ROCKCHIP_BOOT_RETURN_REG;*/ + /* } */ +early_return: + bx lr /* return to LR in BROM */ + +SAVE_SP_ADDR: + .word 0 + + .globl save_boot_params +save_boot_params: + push {r1-r12, lr} + ldr r0, =SAVE_SP_ADDR + str sp, [r0] + b save_boot_params_ret + + .globl back_to_bootrom +back_to_bootrom: + ldr r0, =SAVE_SP_ADDR + ldr sp, [r0] + mov r0, #0 + pop {r1-r12, pc} +#endif + +#if (defined(CONFIG_SPL_BUILD)) +/* U-Boot proper of armv7 does not need this */ + b reset +#endif + +/* + * For armv7, the addr '_start' will be used as vector start address + * and is written to the VBAR register, which needs to aligned to 0x20. + */ + .align(5), 0x0 +_start: + ARM_VECTORS #endif |