projects / people / ms / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| df9041ec HS |
1 | /* |
| 2 | * (C) Copyright 2015 Google, Inc | |
| 3 | * | |
| 4 | * SPDX-License-Identifier: GPL-2.0+ | |
| 5 | */ | |
| 6 | ||
| 7 | #include <common.h> | |
| 8 | #include <debug_uart.h> | |
| 9 | #include <spl.h> | |
| 10 | #include <asm/io.h> | |
| 11 | #include <asm/arch/bootrom.h> | |
| 12 | #include <asm/arch/pmu_rk3188.h> | |
| 13 | ||
| 14 | DECLARE_GLOBAL_DATA_PTR; | |
| 15 | ||
| 16 | /* track how often we were entered */ | |
| 17 | static int rk3188_num_entries __attribute__ ((section(".data"))); | |
| 18 | ||
| 19 | #define PMU_BASE 0x20004000 | |
| 007a4352 | 20 | #define SPL_ENTRY 0x10080C00 |
| df9041ec HS |
21 | |
| 22 | static void jump_to_spl(void) | |
| 23 | { | |
| 24 | typedef void __noreturn (*image_entry_noargs_t)(void); | |
| 25 | ||
| 26 | struct rk3188_pmu * const pmu = (void *)PMU_BASE; | |
| 27 | image_entry_noargs_t tpl_entry = | |
| 007a4352 | 28 | (image_entry_noargs_t)(unsigned long)SPL_ENTRY; |
| df9041ec | 29 | |
| 007a4352 | 30 | /* Store the SAVE_SP_ADDR in a location shared with SPL. */ |
| df9041ec HS |
31 | writel(SAVE_SP_ADDR, &pmu->sys_reg[2]); |
| 32 | tpl_entry(); | |
| 33 | } | |
| 34 | ||
| 35 | void board_init_f(ulong dummy) | |
| 36 | { | |
| 37 | /* Example code showing how to enable the debug UART on RK3188 */ | |
| 38 | #ifdef EARLY_UART | |
| 39 | #include <asm/arch/grf_rk3188.h> | |
| 40 | /* Enable early UART on the RK3188 */ | |
| 41 | #define GRF_BASE 0x20008000 | |
| 42 | struct rk3188_grf * const grf = (void *)GRF_BASE; | |
| 43 | ||
| 44 | rk_clrsetreg(&grf->gpio1b_iomux, | |
| 45 | GPIO1B1_MASK << GPIO1B1_SHIFT | | |
| 46 | GPIO1B0_MASK << GPIO1B0_SHIFT, | |
| 47 | GPIO1B1_UART2_SOUT << GPIO1B1_SHIFT | | |
| 48 | GPIO1B0_UART2_SIN << GPIO1B0_SHIFT); | |
| 49 | /* | |
| 50 | * Debug UART can be used from here if required: | |
| 51 | * | |
| 52 | * debug_uart_init(); | |
| 53 | * printch('a'); | |
| 54 | * printhex8(0x1234); | |
| 55 | * printascii("string"); | |
| 56 | */ | |
| 57 | debug_uart_init(); | |
| 58 | ||
| 59 | printch('t'); | |
| 60 | printch('p'); | |
| 61 | printch('l'); | |
| 62 | printch('-'); | |
| 63 | printch(rk3188_num_entries + 1 + '0'); | |
| 64 | printch('\n'); | |
| 65 | #endif | |
| 66 | ||
| 67 | rk3188_num_entries++; | |
| 68 | ||
| 69 | if (rk3188_num_entries == 1) { | |
| 70 | /* | |
| 71 | * The original loader did some very basic integrity | |
| 72 | * checking at this point, but the remaining few bytes | |
| 73 | * could be used for any improvement making sense | |
| 74 | * really early on. | |
| 75 | */ | |
| 76 | ||
| 77 | back_to_bootrom(); | |
| 78 | } else { | |
| 79 | /* | |
| 80 | * TPL part of the loader should now wait for us | |
| 81 | * at offset 0xC00 in the sram. Should never return | |
| 82 | * from there. | |
| 83 | */ | |
| 84 | jump_to_spl(); | |
| 85 | } | |
| 86 | } |