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https://github.com/brain-hackers/u-boot-brain
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![Rick Chen](/assets/img/avatar_default.png)
ax25-ae350 use CONFIG_OF_BOARD via a2 and CONFIG_SYS_SDRAM_BASE to boot from ram which allow the board to override the fdt address originally. But after this patch riscv: save hart ID and device tree passed by prior boot stage It provide prior_stage_fdt_address which offer a temporary memory address to keep the dtb address passing from loader(gdb) to u-boot with a1. So passing via a2 and CONFIG_SYS_SDRAM_BASE is redundant and can be removed. And it also somehow may corrupted BBL if it was be arranged in CONFIG_SYS_SDRAM_BASE. In board_fdt_blob_setup() When boting from ram: prior_stage_fdt_address will be use to reserved dtb temporarily. When booting from ROM: dtb will be pre-burned in CONFIG_SYS_FDT_BASE, if it is flash base. Or CONFIG_SYS_FDT_BASE maybe a memory map space (NOT RAM or ROM) which is provided by HW. Signed-off-by: Rick Chen <rick@andestech.com> Cc: Greentime Hu <greentime@andestech.com>
108 lines
2.1 KiB
C
108 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2017 Andes Technology Corporation
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* Rick Chen, Andes Technology Corporation <rick@andestech.com>
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*/
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#include <common.h>
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#if defined(CONFIG_FTMAC100) && !defined(CONFIG_DM_ETH)
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#include <netdev.h>
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#endif
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#include <linux/io.h>
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#include <faraday/ftsmc020.h>
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#include <fdtdec.h>
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DECLARE_GLOBAL_DATA_PTR;
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extern phys_addr_t prior_stage_fdt_address;
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/*
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* Miscellaneous platform dependent initializations
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*/
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int board_init(void)
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{
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gd->bd->bi_boot_params = PHYS_SDRAM_0 + 0x400;
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return 0;
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}
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int dram_init(void)
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{
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unsigned long sdram_base = PHYS_SDRAM_0;
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unsigned long expected_size = PHYS_SDRAM_0_SIZE + PHYS_SDRAM_1_SIZE;
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unsigned long actual_size;
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actual_size = get_ram_size((void *)sdram_base, expected_size);
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gd->ram_size = actual_size;
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if (expected_size != actual_size) {
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printf("Warning: Only %lu of %lu MiB SDRAM is working\n",
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actual_size >> 20, expected_size >> 20);
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}
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return 0;
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}
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int dram_init_banksize(void)
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{
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gd->bd->bi_dram[0].start = PHYS_SDRAM_0;
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gd->bd->bi_dram[0].size = PHYS_SDRAM_0_SIZE;
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gd->bd->bi_dram[1].start = PHYS_SDRAM_1;
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gd->bd->bi_dram[1].size = PHYS_SDRAM_1_SIZE;
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return 0;
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}
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#if defined(CONFIG_FTMAC100) && !defined(CONFIG_DM_ETH)
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int board_eth_init(bd_t *bd)
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{
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return ftmac100_initialize(bd);
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}
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#endif
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ulong board_flash_get_legacy(ulong base, int banknum, flash_info_t *info)
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{
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return 0;
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}
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void *board_fdt_blob_setup(void)
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{
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void **ptr = (void *)&prior_stage_fdt_address;
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if (fdt_magic(*ptr) == FDT_MAGIC)
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return (void *)*ptr;
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return (void *)CONFIG_SYS_FDT_BASE;
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}
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int smc_init(void)
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{
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int node = -1;
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const char *compat = "andestech,atfsmc020";
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void *blob = (void *)gd->fdt_blob;
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fdt_addr_t addr;
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struct ftsmc020_bank *regs;
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node = fdt_node_offset_by_compatible(blob, -1, compat);
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if (node < 0)
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return -FDT_ERR_NOTFOUND;
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addr = fdtdec_get_addr(blob, node, "reg");
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if (addr == FDT_ADDR_T_NONE)
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return -EINVAL;
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regs = (struct ftsmc020_bank *)addr;
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regs->cr &= ~FTSMC020_BANK_WPROT;
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return 0;
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}
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#ifdef CONFIG_BOARD_EARLY_INIT_F
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int board_early_init_f(void)
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{
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smc_init();
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return 0;
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}
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#endif
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