123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899 |
- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Onboard memory detection for Snapdragon boards
- *
- * (C) Copyright 2018 Ramon Fried <ramon.fried@gmail.com>
- *
- */
- #include <common.h>
- #include <dm.h>
- #include <part.h>
- #include <smem.h>
- #include <fdt_support.h>
- #include <asm/arch/dram.h>
- #define SMEM_USABLE_RAM_PARTITION_TABLE 402
- #define RAM_PART_NAME_LENGTH 16
- #define RAM_NUM_PART_ENTRIES 32
- #define CATEGORY_SDRAM 0x0E
- #define TYPE_SYSMEM 0x01
- struct smem_ram_ptable_hdr {
- u32 magic[2];
- u32 version;
- u32 reserved;
- u32 len;
- } __attribute__ ((__packed__));
- struct smem_ram_ptn {
- char name[RAM_PART_NAME_LENGTH];
- u64 start;
- u64 size;
- u32 attr;
- u32 category;
- u32 domain;
- u32 type;
- u32 num_partitions;
- u32 reserved[3];
- } __attribute__ ((__packed__));
- struct smem_ram_ptable {
- struct smem_ram_ptable_hdr hdr;
- u32 reserved; /* Added for 8 bytes alignment of header */
- struct smem_ram_ptn parts[RAM_NUM_PART_ENTRIES];
- } __attribute__ ((__packed__));
- #ifndef MEMORY_BANKS_MAX
- #define MEMORY_BANKS_MAX 4
- #endif
- int msm_fixup_memory(void *blob)
- {
- u64 bank_start[MEMORY_BANKS_MAX];
- u64 bank_size[MEMORY_BANKS_MAX];
- size_t size;
- int i;
- int count = 0;
- struct udevice *smem;
- int ret;
- struct smem_ram_ptable *ram_ptable;
- struct smem_ram_ptn *p;
- ret = uclass_get_device_by_name(UCLASS_SMEM, "smem", &smem);
- if (ret < 0) {
- printf("Failed to find SMEM node. Check device tree\n");
- return 0;
- }
- ram_ptable = smem_get(smem, -1, SMEM_USABLE_RAM_PARTITION_TABLE, &size);
- if (!ram_ptable) {
- printf("Failed to find SMEM partition.\n");
- return -ENODEV;
- }
- /* Check validy of RAM */
- for (i = 0; i < RAM_NUM_PART_ENTRIES; i++) {
- p = &ram_ptable->parts[i];
- if (p->category == CATEGORY_SDRAM && p->type == TYPE_SYSMEM) {
- bank_start[count] = p->start;
- bank_size[count] = p->size;
- debug("Detected memory bank %u: start: 0x%llx size: 0x%llx\n",
- count, p->start, p->size);
- count++;
- }
- }
- if (!count) {
- printf("Failed to detect any memory bank\n");
- return -ENODEV;
- }
- ret = fdt_fixup_memory_banks(blob, bank_start, bank_size, count);
- if (ret)
- return ret;
- return 0;
- }
|