From 1b378cc95addaf3d8d6928069b84c7a5c4e73f24 Mon Sep 17 00:00:00 2001 From: Tien Fong Chee Date: Tue, 10 Aug 2021 11:26:36 +0800 Subject: [PATCH] ddr: socfpga: Enable memory test on memory size less than 1GB Minimum 1GB memory size is required in current memory test, so this patch improves the memory test for processing memory size less than 1GB, and the size in power of two. Signed-off-by: Tien Fong Chee --- drivers/ddr/altera/sdram_soc64.c | 24 +++++++++++++++++++++--- 1 file changed, 21 insertions(+), 3 deletions(-) diff --git a/drivers/ddr/altera/sdram_soc64.c b/drivers/ddr/altera/sdram_soc64.c index a08f095..cc656db 100644 --- a/drivers/ddr/altera/sdram_soc64.c +++ b/drivers/ddr/altera/sdram_soc64.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 /* - * Copyright (C) 2016-2019 Intel Corporation + * Copyright (C) 2016-2021 Intel Corporation * */ @@ -182,6 +182,7 @@ void sdram_size_check(struct bd_info *bd) phys_size_t total_ram_check = 0; phys_size_t ram_check = 0; phys_addr_t start = 0; + phys_size_t size, remaining_size; int bank; /* Sanity check ensure correct SDRAM size specified */ @@ -189,10 +190,27 @@ void sdram_size_check(struct bd_info *bd) for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) { start = bd->bi_dram[bank].start; + remaining_size = bd->bi_dram[bank].size; while (ram_check < bd->bi_dram[bank].size) { - ram_check += get_ram_size((void *)(start + ram_check), - (phys_size_t)SZ_1G); + size = min((phys_addr_t)SZ_1G, + (phys_addr_t)remaining_size); + + /* + * Ensure the size is power of two, this is requirement + * to run get_ram_size() / memory test + */ + if (size != 0 && ((size & (size - 1)) == 0)) { + ram_check += get_ram_size((void *) + (start + ram_check), size); + remaining_size = bd->bi_dram[bank].size - + ram_check; + } else { + puts("DDR: Memory test requires SDRAM size "); + puts("in power of two!\n"); + hang(); + } } + total_ram_check += ram_check; ram_check = 0; } -- 2.7.4