On 16/10/2026 12:40 pm, Chen Huei Lok wrote:
From: Tien Fong Chee <[email protected]>
Bit[30] of the boot scratch cold 8 register tracks DDR init progress. SDM
inspects it when the watchdog fires due to a DDR init hang, so that it can
run a clean reset of the DDR subsystem before the next attempt.
Set the bit when SDRAM init starts and clear it once the basic memory test
has passed.
Signed-off-by: Tien Fong Chee <[email protected]>
Signed-off-by: Chen Huei Lok <[email protected]>
---
drivers/ddr/altera/sdram_n5x.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/drivers/ddr/altera/sdram_n5x.c b/drivers/ddr/altera/sdram_n5x.c
index 4ac22c536fc..4da0617e37c 100644
--- a/drivers/ddr/altera/sdram_n5x.c
+++ b/drivers/ddr/altera/sdram_n5x.c
@@ -420,6 +420,18 @@ enum data_process {
LOADING
};
+void ddr_init_inprogress(bool start)
+{
+ if (start)
+ setbits_le32(socfpga_get_sysmgr_addr() +
+ SYSMGR_SOC64_BOOT_SCRATCH_COLD8,
+ ALT_SYSMGR_SCRATCH_REG_8_DDR_PROGRESS_MASK);
+ else
+ clrbits_le32(socfpga_get_sysmgr_addr() +
+ SYSMGR_SOC64_BOOT_SCRATCH_COLD8,
+ ALT_SYSMGR_SCRATCH_REG_8_DDR_PROGRESS_MASK);
+}
+
bool is_ddr_retention_enabled(u32 reg)
{
if (reg & ALT_SYSMGR_SCRATCH_REG_0_DDR_RETENTION_MASK)
@@ -2820,6 +2832,7 @@ int sdram_mmr_init_full(struct udevice *dev)
if (!is_ddr_init_skipped(reg)) {
printf("SDRAM init in progress ...\n");
+ ddr_init_inprogress(true);
/*
* Polling reset complete, must be high to ensure DDR
@@ -2970,6 +2983,9 @@ int sdram_mmr_init_full(struct udevice *dev)
sdram_size_check(&bd);
+ /* Marking end of ddr init with passing basic memory test */
+ ddr_init_inprogress(false);
+
sdram_set_firewall(&bd);
if (is_ddr_retention_enabled(reg)) {
Reviewed-by: Tien Fong Chee <[email protected]>
Best regards,
Tien Fong
