primitive_memtest.c

Go to the documentation of this file.

/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <stdint.h>
#include <lib.h>
#include <console/console.h>
 
int primitive_memtest(uintptr_t base, uintptr_t size)
{
        uintptr_t *p;
        uintptr_t i;
        int bad = 0;
 
        printk(BIOS_SPEW, "Performing primitive memory test.\n");
        printk(BIOS_SPEW, "DRAM start: 0x%08x, DRAM size: 0x%08x", base, size);
        for (i = base; i < base + (size - 1) - sizeof(p); i += sizeof(p)) {
                if (i % 0x100000 == 0) {
                        if ((i % 0x800000) == 0)
                                printk(BIOS_SPEW, "\n");
                        else if (i != 0)
                                printk(BIOS_SPEW, " ");
                        printk(BIOS_SPEW, "0x%08x", i);
                }
                p = (uintptr_t *)i;
                *p = i;
        }
 
        printk(BIOS_SPEW, "\n\nReading back DRAM content");
        for (i = base; i < base + (size - 1) - sizeof(p); i += sizeof(p)) {
                if (i % 0x100000 == 0) {
                        if ((i % 0x800000) == 0)
                                printk(BIOS_SPEW, "\n");
                        else if (i != 0)
                                printk(BIOS_SPEW, " ");
                        printk(BIOS_SPEW, "0x%08x", i);
                }
 
                p = (uintptr_t *)i;
                if (*p != i) {
                        printk(BIOS_SPEW, "\n0x%08zx: got 0x%zx\n", i, *p);
                        bad++;
                }
        }
 
        printk(BIOS_SPEW, "\n");
        printk(BIOS_SPEW, "%d errors\n", bad);
 
        return bad;
}