1 // SPDX-License-Identifier: GPL-2.0+
3 * Onboard memory detection for Snapdragon boards
5 * (C) Copyright 2018 Ramon Fried <ramon.fried@gmail.com>
14 #include <fdt_support.h>
15 #include <asm/arch/dram.h>
17 #define SMEM_USABLE_RAM_PARTITION_TABLE 402
18 #define RAM_PART_NAME_LENGTH 16
19 #define RAM_NUM_PART_ENTRIES 32
20 #define CATEGORY_SDRAM 0x0E
21 #define TYPE_SYSMEM 0x01
23 struct smem_ram_ptable_hdr {
28 } __attribute__ ((__packed__));
31 char name[RAM_PART_NAME_LENGTH];
40 } __attribute__ ((__packed__));
42 struct smem_ram_ptable {
43 struct smem_ram_ptable_hdr hdr;
44 u32 reserved; /* Added for 8 bytes alignment of header */
45 struct smem_ram_ptn parts[RAM_NUM_PART_ENTRIES];
46 } __attribute__ ((__packed__));
48 #ifndef MEMORY_BANKS_MAX
49 #define MEMORY_BANKS_MAX 4
52 int msm_fixup_memory(void *blob)
54 u64 bank_start[MEMORY_BANKS_MAX];
55 u64 bank_size[MEMORY_BANKS_MAX];
61 struct smem_ram_ptable *ram_ptable;
62 struct smem_ram_ptn *p;
64 ret = uclass_get_device_by_name(UCLASS_SMEM, "smem", &smem);
66 printf("Failed to find SMEM node. Check device tree\n");
70 ram_ptable = smem_get(smem, -1, SMEM_USABLE_RAM_PARTITION_TABLE, &size);
73 printf("Failed to find SMEM partition.\n");
77 /* Check validy of RAM */
78 for (i = 0; i < RAM_NUM_PART_ENTRIES; i++) {
79 p = &ram_ptable->parts[i];
80 if (p->category == CATEGORY_SDRAM && p->type == TYPE_SYSMEM) {
81 bank_start[count] = p->start;
82 bank_size[count] = p->size;
83 debug("Detected memory bank %u: start: 0x%llx size: 0x%llx\n",
84 count, p->start, p->size);
90 printf("Failed to detect any memory bank\n");
94 ret = fdt_fixup_memory_banks(blob, bank_start, bank_size, count);