From: Tien Fong Chee <[email protected]> A double-bit ECC error (DBE) means the retained DDR contents can no longer be trusted. Detect the DBE status and force a full DDR init and calibration in that case instead of taking the retention / warm-reset skip path.
Signed-off-by: Tien Fong Chee <[email protected]> Signed-off-by: Chen Huei Lok <[email protected]> --- drivers/ddr/altera/sdram_n5x.c | 33 ++++++++++++++++++++++++--------- 1 file changed, 24 insertions(+), 9 deletions(-) diff --git a/drivers/ddr/altera/sdram_n5x.c b/drivers/ddr/altera/sdram_n5x.c index 9c3f07b409d..f6ce15bffaa 100644 --- a/drivers/ddr/altera/sdram_n5x.c +++ b/drivers/ddr/altera/sdram_n5x.c @@ -421,6 +421,17 @@ enum data_process { LOADING }; +bool is_ddr_dbe_triggered(void) +{ + u32 reg = readl(socfpga_get_sysmgr_addr() + + SYSMGR_SOC64_BOOT_SCRATCH_COLD8); + + if (reg & ALT_SYSMGR_SCRATCH_REG_8_DDR_DBE_MASK) + return true; + + return false; +} + void ddr_init_inprogress(bool start) { if (start) @@ -479,17 +490,20 @@ bool is_ddr_init_skipped(u32 reg) reset_type_print(reset_t); - if (reset_t == WARM_RESET) { - debug("%s: DDR init is skipped\n", __func__); - return true; - } - - if (reset_t == COLD_RESET) { - if (is_ddr_retention_enabled(reg)) { - debug("%s: DDR retention bit is set\n", __func__); + if (!is_ddr_dbe_triggered()) { + if (reset_t == WARM_RESET) { debug("%s: DDR init is skipped\n", __func__); return true; } + + if (reset_t == COLD_RESET) { + if (is_ddr_retention_enabled(reg)) { + debug("%s: DDR retention bit is set\n", + __func__); + debug("%s: DDR init is skipped\n", __func__); + return true; + } + } } debug("%s: DDR init is required\n", __func__); @@ -501,7 +515,8 @@ bool is_ddr_calibration_skipped(u32 reg) enum reset_type reset_t = get_reset_type(reg); if ((reset_t == NCONFIG || reset_t == JTAG_CONFIG || - reset_t == RSU_RECONFIG) && is_ddr_retention_enabled(reg)) { + reset_t == RSU_RECONFIG) && is_ddr_retention_enabled(reg) && + !is_ddr_dbe_triggered()) { debug("%s: DDR retention bit is set\n", __func__); return true; } -- 2.43.7
