cbmem.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#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;
}