src/soc/nvidia/tegra210/cbmem.c


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/* SPDX-License-Identifier: GPL-2.0-only */
/* This file is part of the coreboot project. */

#include <cbmem.h>
#include <soc/addressmap.h>

void *cbmem_top_chipset(void)
{
	static uintptr_t addr;

	if (addr == 0) {
		uintptr_t begin_mib;
		uintptr_t end_mib;

		memory_in_range_below_4gb(&begin_mib, &end_mib);
		/* Make sure we consume everything up to 4GIB. */
		if (end_mib == 4096)
			addr = ~(uint32_t)0;
		else
			addr = end_mib << 20;
	}

	return (void *)addr;
}