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/*
* Copyright (c) 2021, ARM Limited. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <libfdt.h>
#include <common/debug.h>
#include <common/fdt_fixup.h>
#include <common/fdt_wrappers.h>
#include <sunxi_private.h>
void sunxi_prepare_dtb(void *fdt)
{
int ret;
if (fdt == NULL || fdt_check_header(fdt) != 0) {
return;
}
ret = fdt_open_into(fdt, fdt, 0x10000);
if (ret < 0) {
ERROR("Preparing devicetree at %p: error %d\n", fdt, ret);
return;
}
#ifdef SUNXI_BL31_IN_DRAM
/* Reserve memory used by Trusted Firmware. */
if (fdt_add_reserved_memory(fdt, "tf-a@40000000", BL31_BASE,
BL31_LIMIT - BL31_BASE)) {
WARN("Failed to add reserved memory nodes to DT.\n");
}
#endif
if (sunxi_psci_is_scpi()) {
ret = fdt_add_cpu_idle_states(fdt, sunxi_idle_states);
if (ret < 0) {
WARN("Failed to add idle states to DT: %d\n", ret);
}
}
ret = fdt_pack(fdt);
if (ret < 0) {
ERROR("Failed to pack devicetree at %p: error %d\n",
fdt, ret);
}
clean_dcache_range((uintptr_t)fdt, fdt_blob_size(fdt));
INFO("Changed devicetree.\n");
}
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