mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-09-06 12:53:21 +09:00
152 lines
3.6 KiB
C
152 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2020 Western Digital Corporation or its affiliates
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*
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*/
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#include <common.h>
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#include <fdt_support.h>
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#include <log.h>
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#include <mapmem.h>
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DECLARE_GLOBAL_DATA_PTR;
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/**
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* riscv_fdt_copy_resv_mem_node() - Copy reserve memory node entry
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* @src: Pointer to the source device tree from which reserved memory node
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* needs to be copied.
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* @dst: Pointer to the destination device tree to which reserved memory node
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* needs to be copied.
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*
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* Return: 0 on success or if source doesn't have reserved memory node.
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* Error if copy process failed.
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*/
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int riscv_fdt_copy_resv_mem_node(const void *src, void *dst)
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{
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u32 phandle;
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struct fdt_memory pmp_mem;
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fdt_addr_t addr;
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fdt_size_t size;
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int offset, node, err, rmem_offset;
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bool nomap = true;
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char basename[32] = {0};
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int bname_len;
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int max_len = sizeof(basename);
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const char *name;
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char *temp;
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offset = fdt_path_offset(src, "/reserved-memory");
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if (offset < 0) {
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printf("No reserved memory region found in source FDT\n");
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return 0;
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}
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fdt_for_each_subnode(node, src, offset) {
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name = fdt_get_name(src, node, NULL);
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addr = fdtdec_get_addr_size_auto_noparent(src, node,
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"reg", 0, &size,
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false);
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if (addr == FDT_ADDR_T_NONE) {
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debug("failed to read address/size for %s\n", name);
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continue;
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}
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strncpy(basename, name, max_len);
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temp = strchr(basename, '@');
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if (temp) {
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bname_len = strnlen(basename, max_len) - strnlen(temp,
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max_len);
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*(basename + bname_len) = '\0';
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}
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pmp_mem.start = addr;
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pmp_mem.end = addr + size - 1;
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err = fdtdec_add_reserved_memory(dst, basename, &pmp_mem,
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&phandle);
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if (err < 0) {
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printf("failed to add reserved memory: %d\n", err);
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return err;
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}
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if (!fdt_getprop(src, node, "no-map", NULL))
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nomap = false;
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if (nomap) {
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rmem_offset = fdt_node_offset_by_phandle(dst, phandle);
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fdt_setprop_empty(dst, rmem_offset, "no-map");
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}
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}
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return 0;
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}
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/**
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* riscv_board_reserved_mem_fixup() - Fix up reserved memory node for a board
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* @fdt: Pointer to the device tree in which reserved memory node needs to be
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* added.
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*
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* In RISC-V, any board compiled with OF_SEPARATE needs to copy the reserved
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* memory node from the device tree provided by the firmware to the device tree
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* used by U-Boot. This is a common function that individual board fixup
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* functions can invoke.
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*
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* Return: 0 on success or error otherwise.
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*/
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int riscv_board_reserved_mem_fixup(void *fdt)
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{
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int err;
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void *src_fdt_addr;
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src_fdt_addr = map_sysmem(gd->arch.firmware_fdt_addr, 0);
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err = riscv_fdt_copy_resv_mem_node(src_fdt_addr, fdt);
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if (err < 0)
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return err;
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return 0;
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}
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#ifdef CONFIG_OF_BOARD_FIXUP
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int board_fix_fdt(void *fdt)
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{
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int err;
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err = riscv_board_reserved_mem_fixup(fdt);
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if (err < 0) {
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printf("failed to fixup DT for reserved memory: %d\n", err);
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return err;
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}
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return 0;
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}
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#endif
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int arch_fixup_fdt(void *blob)
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{
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int err;
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#ifdef CONFIG_EFI_LOADER
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u32 size;
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int chosen_offset;
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size = fdt_totalsize(blob);
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err = fdt_open_into(blob, blob, size + 32);
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if (err < 0) {
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printf("Device Tree can't be expanded to accommodate new node");
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return err;
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}
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chosen_offset = fdt_path_offset(blob, "/chosen");
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if (chosen_offset < 0) {
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err = fdt_add_subnode(blob, 0, "chosen");
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if (err < 0) {
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printf("chosen node can not be added\n");
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return err;
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}
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}
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/* Overwrite the boot-hartid as U-Boot is the last stage BL */
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fdt_setprop_u32(blob, chosen_offset, "boot-hartid", gd->arch.boot_hart);
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#endif
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/* Copy the reserved-memory node to the DT used by OS */
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err = riscv_fdt_copy_resv_mem_node(gd->fdt_blob, blob);
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if (err < 0)
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return err;
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return 0;
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}
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