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// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
/*
* Copyright (C) 2018, STMicroelectronics - All Rights Reserved
*/
#define LOG_CATEGORY LOGC_ARCH
#include <common.h>
#include <dm.h>
#include <image.h>
#include <init.h>
#include <lmb.h>
#include <log.h>
#include <ram.h>
#include <asm/global_data.h>
#include <asm/system.h>
DECLARE_GLOBAL_DATA_PTR;
int dram_init(void)
{
struct ram_info ram;
struct udevice *dev;
int ret;
ret = uclass_get_device(UCLASS_RAM, 0, &dev);
if (ret) {
log_debug("RAM init failed: %d\n", ret);
return ret;
}
ret = ram_get_info(dev, &ram);
if (ret) {
log_debug("Cannot get RAM size: %d\n", ret);
return ret;
}
log_debug("RAM init base=%lx, size=%x\n", ram.base, ram.size);
gd->ram_size = ram.size;
return 0;
}
phys_addr_t board_get_usable_ram_top(phys_size_t total_size)
{
phys_size_t size;
phys_addr_t reg;
struct lmb lmb;
if (!total_size)
return gd->ram_top;
/* found enough not-reserved memory to relocated U-Boot */
lmb_init(&lmb);
lmb_add(&lmb, gd->ram_base, get_effective_memsize());
boot_fdt_add_mem_rsv_regions(&lmb, (void *)gd->fdt_blob);
/* add 8M for reserved memory for display, fdt, gd,... */
size = ALIGN(SZ_8M + CONFIG_SYS_MALLOC_LEN + total_size, MMU_SECTION_SIZE),
reg = lmb_alloc(&lmb, size, MMU_SECTION_SIZE);
if (!reg)
reg = gd->ram_top - size;
/* before relocation, mark the U-Boot memory as cacheable by default */
if (!(gd->flags & GD_FLG_RELOC))
mmu_set_region_dcache_behaviour(reg, size, DCACHE_DEFAULT_OPTION);
return reg + size;
}
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