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ddr: altera: arria10: Add DRAM size checking

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Add DRAM size checking compare between size from device tree and actual
hardware.

Trigger hang if DRAM size from device tree is greater than actual hardware.
Display warning message if DRAM size mismatch between device tree and
actual hardware.

Signed-off-by: Alif Zakuan Yuslaimi <alif.zakuan.yuslaimi@altera.com>
Reviewed-by: Tien Fong Chee <tien.fong.chee@altera.com> Best regards,
This commit is contained in:
Alif Zakuan Yuslaimi
2025-12-16 00:46:22 -08:00
committed by Tom Rini
parent 83f2843f20
commit 847e67582b
1 changed files with 32 additions and 0 deletions
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32
drivers/ddr/altera/sdram_arria10.c
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@@ -8,6 +8,7 @@
#include <fdtdec.h>
#include <init.h>
#include <log.h>
#include <hang.h>
#include <malloc.h>
#include <wait_bit.h>
#include <watchdog.h>
@@ -667,6 +668,22 @@ static int of_sdram_firewall_setup(const void *blob)
return 0;
}
static void sdram_size_check(void)
{
phys_size_t ram_check = 0;
debug("DDR: Running SDRAM size sanity check\n");
ram_check = get_ram_size((long *)gd->bd->bi_dram[0].start,
gd->bd->bi_dram[0].size);
if (ram_check != gd->bd->bi_dram[0].size) {
puts("DDR: SDRAM size check failed!\n");
hang();
}
debug("DDR: SDRAM size check passed!\n");
}
int ddr_calibration_sequence(void)
{
schedule();
@@ -702,11 +719,26 @@ int ddr_calibration_sequence(void)
/* setup the dram info within bd */
dram_init_banksize();
if (gd->ram_size != gd->bd->bi_dram[0].size) {
printf("DDR: Warning: DRAM size from device tree (%ld MiB)\n",
gd->bd->bi_dram[0].size >> 20);
printf(" mismatch with hardware (%ld MiB).\n",
gd->ram_size >> 20);
}
if (gd->bd->bi_dram[0].size > gd->ram_size) {
printf("DDR: Error: DRAM size from device tree is greater\n");
printf(" than hardware size.\n");
hang();
}
if (of_sdram_firewall_setup(gd->fdt_blob))
puts("FW: Error Configuring Firewall\n");
if (sdram_is_ecc_enabled())
sdram_init_ecc_bits(gd->ram_size);
sdram_size_check();
return 0;
}