127 lines
3.0 KiB
C
127 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* board/renesas/rcar-common/common.c
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*
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* Copyright (C) 2013 Renesas Electronics Corporation
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* Copyright (C) 2013 Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
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* Copyright (C) 2015 Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
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*/
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#include <common.h>
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#include <dm.h>
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#include <init.h>
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#include <asm/global_data.h>
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#include <dm/uclass-internal.h>
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#include <asm/arch/rmobile.h>
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#include <linux/libfdt.h>
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#ifdef CONFIG_RCAR_GEN3
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DECLARE_GLOBAL_DATA_PTR;
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/* If the firmware passed a device tree use it for U-Boot DRAM setup. */
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extern u64 rcar_atf_boot_args[];
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int fdtdec_board_setup(const void *fdt_blob)
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{
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void *atf_fdt_blob = (void *)(rcar_atf_boot_args[1]);
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if (fdt_magic(atf_fdt_blob) == FDT_MAGIC)
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fdt_overlay_apply_node((void *)fdt_blob, 0, atf_fdt_blob, 0);
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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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return fdtdec_setup_mem_size_base();
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}
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int dram_init_banksize(void)
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{
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fdtdec_setup_memory_banksize();
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return 0;
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}
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#if defined(CONFIG_OF_BOARD_SETUP)
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static int is_mem_overlap(void *blob, int first_mem_node, int curr_mem_node)
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{
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struct fdt_resource first_mem_res, curr_mem_res;
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int curr_mem_reg, first_mem_reg = 0;
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int ret;
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for (;;) {
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ret = fdt_get_resource(blob, first_mem_node, "reg",
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first_mem_reg++, &first_mem_res);
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if (ret) /* No more entries, no overlap found */
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return 0;
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curr_mem_reg = 0;
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for (;;) {
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ret = fdt_get_resource(blob, curr_mem_node, "reg",
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curr_mem_reg++, &curr_mem_res);
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if (ret) /* No more entries, check next tuple */
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break;
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if (curr_mem_res.end < first_mem_res.start)
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continue;
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if (curr_mem_res.start >= first_mem_res.end)
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continue;
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printf("Overlap found: 0x%llx..0x%llx / 0x%llx..0x%llx\n",
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first_mem_res.start, first_mem_res.end,
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curr_mem_res.start, curr_mem_res.end);
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return 1;
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}
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}
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return 0;
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}
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int ft_board_setup(void *blob, struct bd_info *bd)
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{
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/*
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* Scrub duplicate /memory@* node entries here. Some R-Car DTs might
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* contain multiple /memory@* nodes, however fdt_fixup_memory_banks()
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* either generates single /memory node or updates the first /memory
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* node. Any remaining memory nodes are thus potential duplicates.
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*
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* However, it is not possible to delete all the memory nodes right
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* away, since some of those might not be DRAM memory nodes, but some
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* sort of other memory. Thus, delete only the memory nodes which are
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* in the R-Car3 DBSC ranges.
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*/
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int mem = 0, first_mem_node = 0;
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for (;;) {
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mem = fdt_node_offset_by_prop_value(blob, mem,
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"device_type", "memory", 7);
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if (mem < 0)
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break;
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if (!fdtdec_get_is_enabled(blob, mem))
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continue;
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/* First memory node, patched by U-Boot */
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if (!first_mem_node) {
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first_mem_node = mem;
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continue;
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}
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/* Check the remaining nodes and delete duplicates */
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if (!is_mem_overlap(blob, first_mem_node, mem))
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continue;
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/* Delete duplicate node, start again */
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fdt_del_node(blob, mem);
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first_mem_node = 0;
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mem = 0;
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}
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return 0;
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}
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#endif
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#endif
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