1  /* SPDX-License-Identifier: GPL-2.0-only */
 2  
 3  #include <stdint.h>
 4  #include <stddef.h>
 5  
 6  /*
 7   * Used in probe_ramsize(). This is a weak function and it's overridden for
 8   * ARMv8. Return 1 when DRAM exists at the address, otherwise return 0.
 9   */
10  int probe_mb(const uintptr_t dram_start, const uintptr_t size);
11  /*
12   * Probe an area if it's read/writable.
13   * Primary use case is the detection of DRAM amount on emulators.
14   *
15   * @param dram_start Physical address of DRAM start
16   * @param probe_size Maximum size in MiB to probe for
17   * @return The detected DRAM size in MiB
18   */
19  size_t probe_ramsize(const uintptr_t dram_start, const size_t probe_size);