mirror of
https://github.com/brain-hackers/u-boot-brain
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67b2904819
For ECC case u-boot divided memory by 2 because one u-boot could be used for both cases when ECC is off or on. Remove this division and make sure that dts file contain the correct memory size when ECC is enabled. Signed-off-by: Michal Simek <michal.simek@xilinx.com>
49 lines
1.4 KiB
C
49 lines
1.4 KiB
C
/*
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* Copyright (C) 2012 - 2013 Michal Simek <monstr@monstr.eu>
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* Copyright (C) 2012 - 2013 Xilinx, Inc. All rights reserved.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <asm/arch/sys_proto.h>
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#include <asm/arch/hardware.h>
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DECLARE_GLOBAL_DATA_PTR;
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/* Control regsiter bitfield definitions */
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#define ZYNQ_DDRC_CTRLREG_BUSWIDTH_MASK 0xC
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#define ZYNQ_DDRC_CTRLREG_BUSWIDTH_SHIFT 2
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#define ZYNQ_DDRC_CTRLREG_BUSWIDTH_16BIT 1
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/* ECC scrub regsiter definitions */
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#define ZYNQ_DDRC_ECC_SCRUBREG_ECC_MODE_MASK 0x7
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#define ZYNQ_DDRC_ECC_SCRUBREG_ECCMODE_SECDED 0x4
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void zynq_ddrc_init(void)
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{
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u32 width, ecctype;
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width = readl(&ddrc_base->ddrc_ctrl);
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width = (width & ZYNQ_DDRC_CTRLREG_BUSWIDTH_MASK) >>
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ZYNQ_DDRC_CTRLREG_BUSWIDTH_SHIFT;
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ecctype = (readl(&ddrc_base->ecc_scrub) &
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ZYNQ_DDRC_ECC_SCRUBREG_ECC_MODE_MASK);
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/* ECC is enabled when memory is in 16bit mode and it is enabled */
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if ((ecctype == ZYNQ_DDRC_ECC_SCRUBREG_ECCMODE_SECDED) &&
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(width == ZYNQ_DDRC_CTRLREG_BUSWIDTH_16BIT)) {
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puts("ECC enabled ");
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/*
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* Clear the first 1MB because it is not initialized from
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* first stage bootloader. To get ECC to work all memory has
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* been initialized by writing any value.
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*/
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/* cppcheck-suppress nullPointer */
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memset((void *)0, 0, 1 * 1024 * 1024);
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} else {
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puts("ECC disabled ");
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}
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}
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