99 lines
2.1 KiB
C
99 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Onboard memory detection for Snapdragon boards
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*
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* (C) Copyright 2018 Ramon Fried <ramon.fried@gmail.com>
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*
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*/
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#include <common.h>
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#include <dm.h>
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#include <smem.h>
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#include <fdt_support.h>
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#include <asm/arch/dram.h>
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#define SMEM_USABLE_RAM_PARTITION_TABLE 402
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#define RAM_PART_NAME_LENGTH 16
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#define RAM_NUM_PART_ENTRIES 32
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#define CATEGORY_SDRAM 0x0E
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#define TYPE_SYSMEM 0x01
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struct smem_ram_ptable_hdr {
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u32 magic[2];
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u32 version;
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u32 reserved;
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u32 len;
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} __attribute__ ((__packed__));
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struct smem_ram_ptn {
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char name[RAM_PART_NAME_LENGTH];
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u64 start;
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u64 size;
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u32 attr;
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u32 category;
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u32 domain;
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u32 type;
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u32 num_partitions;
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u32 reserved[3];
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} __attribute__ ((__packed__));
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struct smem_ram_ptable {
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struct smem_ram_ptable_hdr hdr;
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u32 reserved; /* Added for 8 bytes alignment of header */
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struct smem_ram_ptn parts[RAM_NUM_PART_ENTRIES];
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} __attribute__ ((__packed__));
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#ifndef MEMORY_BANKS_MAX
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#define MEMORY_BANKS_MAX 4
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#endif
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int msm_fixup_memory(void *blob)
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{
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u64 bank_start[MEMORY_BANKS_MAX];
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u64 bank_size[MEMORY_BANKS_MAX];
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size_t size;
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int i;
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int count = 0;
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struct udevice *smem;
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int ret;
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struct smem_ram_ptable *ram_ptable;
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struct smem_ram_ptn *p;
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ret = uclass_get_device_by_name(UCLASS_SMEM, "smem", &smem);
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if (ret < 0) {
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printf("Failed to find SMEM node. Check device tree\n");
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return 0;
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}
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ram_ptable = smem_get(smem, -1, SMEM_USABLE_RAM_PARTITION_TABLE, &size);
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if (!ram_ptable) {
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printf("Failed to find SMEM partition.\n");
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return -ENODEV;
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}
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/* Check validy of RAM */
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for (i = 0; i < RAM_NUM_PART_ENTRIES; i++) {
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p = &ram_ptable->parts[i];
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if (p->category == CATEGORY_SDRAM && p->type == TYPE_SYSMEM) {
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bank_start[count] = p->start;
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bank_size[count] = p->size;
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debug("Detected memory bank %u: start: 0x%llx size: 0x%llx\n",
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count, p->start, p->size);
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count++;
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}
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}
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if (!count) {
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printf("Failed to detect any memory bank\n");
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return -ENODEV;
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}
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ret = fdt_fixup_memory_banks(blob, bank_start, bank_size, count);
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if (ret)
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return ret;
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return 0;
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}
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