For the RK3188, the BROM will attempt to load up the first stage image (SPL for the RK3188) in two steps: first 1KB to offset 0x800 in the SRAM and then the remainder to offset 0xc00 in the SRAM. It always enters at 0x804, though. With this changeset, the RK3188 boot removes the TPL (stub) stage and builds a single SPL binary that utilizes the early back-to-bootrom via the boot0-hook. Consequently, the passing of the saved boot params via pmu->os_reg[2] is also removed. Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>master
Philipp Tomsich
7 years ago
parent
ecfd71891a
commit
4d9253fb76
@ -1,86 +0,0 @@ |
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/*
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* (C) Copyright 2015 Google, Inc |
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* |
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* SPDX-License-Identifier: GPL-2.0+ |
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*/ |
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#include <common.h> |
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#include <debug_uart.h> |
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#include <spl.h> |
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#include <asm/io.h> |
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#include <asm/arch/bootrom.h> |
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#include <asm/arch/pmu_rk3188.h> |
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DECLARE_GLOBAL_DATA_PTR; |
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/* track how often we were entered */ |
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static int rk3188_num_entries __attribute__ ((section(".data"))); |
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#define PMU_BASE 0x20004000 |
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#define SPL_ENTRY 0x10080C00 |
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static void jump_to_spl(void) |
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{ |
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typedef void __noreturn (*image_entry_noargs_t)(void); |
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struct rk3188_pmu * const pmu = (void *)PMU_BASE; |
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image_entry_noargs_t tpl_entry = |
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(image_entry_noargs_t)(unsigned long)SPL_ENTRY; |
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/* Store the SAVE_SP_ADDR in a location shared with SPL. */ |
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writel(SAVE_SP_ADDR, &pmu->sys_reg[2]); |
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tpl_entry(); |
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} |
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void board_init_f(ulong dummy) |
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{ |
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/* Example code showing how to enable the debug UART on RK3188 */ |
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#ifdef EARLY_UART |
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#include <asm/arch/grf_rk3188.h> |
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/* Enable early UART on the RK3188 */ |
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#define GRF_BASE 0x20008000 |
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struct rk3188_grf * const grf = (void *)GRF_BASE; |
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rk_clrsetreg(&grf->gpio1b_iomux, |
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GPIO1B1_MASK << GPIO1B1_SHIFT | |
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GPIO1B0_MASK << GPIO1B0_SHIFT, |
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GPIO1B1_UART2_SOUT << GPIO1B1_SHIFT | |
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GPIO1B0_UART2_SIN << GPIO1B0_SHIFT); |
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/*
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* Debug UART can be used from here if required: |
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* |
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* debug_uart_init(); |
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* printch('a'); |
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* printhex8(0x1234); |
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* printascii("string"); |
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*/ |
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debug_uart_init(); |
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printch('t'); |
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printch('p'); |
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printch('l'); |
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printch('-'); |
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printch(rk3188_num_entries + 1 + '0'); |
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printch('\n'); |
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#endif |
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rk3188_num_entries++; |
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if (rk3188_num_entries == 1) { |
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/*
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* The original loader did some very basic integrity |
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* checking at this point, but the remaining few bytes |
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* could be used for any improvement making sense |
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* really early on. |
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*/ |
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back_to_bootrom(); |
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} else { |
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/*
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* TPL part of the loader should now wait for us |
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* at offset 0xC00 in the sram. Should never return |
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* from there. |
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*/ |
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jump_to_spl(); |
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} |
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} |
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