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https://github.com/u-boot/u-boot.git
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d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commitc8ffd1356d, reversing changes made to2ee6f3a5f7. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
96 lines
2.3 KiB
C
96 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* save_prev_bl_data - saving previous bootloader data
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* to environment variables.
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*
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* Copyright (c) 2022 Dzmitry Sankouski (dsankouski@gmail.com)
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*/
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#include <init.h>
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#include <env.h>
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#include <fdtdec.h>
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#include <fdt_support.h>
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#include <fdt.h>
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#include <common.h>
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#include <linux/errno.h>
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#include <asm/system.h>
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#include <asm/armv8/mmu.h>
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static ulong reg0 __section(".data");
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/**
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* Save x0 register value, assuming previous bootloader set it to
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* point on loaded fdt or (for older linux kernels)atags.
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*/
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void save_boot_params(ulong r0)
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{
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reg0 = r0;
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save_boot_params_ret();
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}
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bool is_addr_accessible(phys_addr_t addr)
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{
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struct mm_region *mem = mem_map;
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phys_addr_t bank_start;
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phys_addr_t bank_end;
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while (mem->size) {
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bank_start = mem->phys;
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bank_end = bank_start + mem->size;
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debug("check if block %pap - %pap includes %pap\n", &bank_start, &bank_end, &addr);
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if (addr > bank_start && addr < bank_end)
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return true;
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mem++;
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}
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return false;
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}
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phys_addr_t get_prev_bl_fdt_addr(void)
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{
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return reg0;
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}
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int save_prev_bl_data(void)
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{
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struct fdt_header *fdt_blob;
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int node;
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u64 initrd_start_prop;
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if (!is_addr_accessible((phys_addr_t)reg0))
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return -ENODATA;
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fdt_blob = (struct fdt_header *)reg0;
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if (!fdt_valid(&fdt_blob)) {
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pr_warn("%s: address 0x%lx is not a valid fdt\n", __func__, reg0);
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return -ENODATA;
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}
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if (IS_ENABLED(CONFIG_SAVE_PREV_BL_FDT_ADDR))
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env_set_addr("prevbl_fdt_addr", (void *)reg0);
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if (!IS_ENABLED(CONFIG_SAVE_PREV_BL_INITRAMFS_START_ADDR))
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return 0;
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node = fdt_path_offset(fdt_blob, "/chosen");
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if (!node) {
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pr_warn("%s: chosen node not found in device tree at addr: 0x%lx\n",
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__func__, reg0);
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return -ENODATA;
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}
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/*
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* linux,initrd-start property might be either 64 or 32 bit,
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* depending on primary bootloader implementation.
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*/
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initrd_start_prop = fdtdec_get_uint64(fdt_blob, node, "linux,initrd-start", 0);
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if (!initrd_start_prop) {
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debug("%s: attempt to get uint64 linux,initrd-start property failed, trying uint\n",
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__func__);
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initrd_start_prop = fdtdec_get_uint(fdt_blob, node, "linux,initrd-start", 0);
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if (!initrd_start_prop) {
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debug("%s: attempt to get uint failed, too\n", __func__);
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return -ENODATA;
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}
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}
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env_set_addr("prevbl_initrd_start_addr", (void *)initrd_start_prop);
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return 0;
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}
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