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https://github.com/AsahiLinux/u-boot
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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
149 lines
3.7 KiB
C
149 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2010
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* Eastman Kodak Company, <www.kodak.com>
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* Michael Zaidman, <michael.zaidman@kodak.com>
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*
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* The code is based on the cpu/mpc83xx/ecc.c written by
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* Dave Liu <daveliu@freescale.com>
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*/
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#include <common.h>
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#include <mpc83xx.h>
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#include <watchdog.h>
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#include <asm/io.h>
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#include <post.h>
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#if CONFIG_POST & CONFIG_SYS_POST_ECC
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/*
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* We use the RAW I/O accessors where possible in order to
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* achieve performance goal, since the test's execution time
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* affects the board start up time.
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*/
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static inline void ecc_clear(ddr83xx_t *ddr)
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{
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/* Clear capture registers */
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__raw_writel(0, &ddr->capture_address);
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__raw_writel(0, &ddr->capture_data_hi);
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__raw_writel(0, &ddr->capture_data_lo);
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__raw_writel(0, &ddr->capture_ecc);
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__raw_writel(0, &ddr->capture_attributes);
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/* Clear SBEC and set SBET to 1 */
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out_be32(&ddr->err_sbe, 1 << ECC_ERROR_MAN_SBET_SHIFT);
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/* Clear Error Detect register */
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out_be32(&ddr->err_detect, ECC_ERROR_DETECT_MME |\
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ECC_ERROR_DETECT_MBE |\
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ECC_ERROR_DETECT_SBE |\
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ECC_ERROR_DETECT_MSE);
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isync();
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}
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int ecc_post_test(int flags)
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{
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int ret = 0;
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int int_state;
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int errbit;
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u32 pattern[2], writeback[2], retval[2];
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ddr83xx_t *ddr = &((immap_t *)CONFIG_SYS_IMMR)->ddr;
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volatile u64 *addr = (u64 *)CONFIG_SYS_POST_ECC_START_ADDR;
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/* The pattern is written into memory to generate error */
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pattern[0] = 0xfedcba98UL;
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pattern[1] = 0x76543210UL;
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/* After injecting error, re-initialize the memory with the value */
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writeback[0] = ~pattern[0];
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writeback[1] = ~pattern[1];
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/* Check if ECC is enabled */
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if (__raw_readl(&ddr->err_disable) & ECC_ERROR_ENABLE) {
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debug("DDR's ECC is not enabled, skipping the ECC POST.\n");
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return 0;
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}
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int_state = disable_interrupts();
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icache_enable();
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#ifdef CONFIG_DDR_32BIT
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/* It seems like no one really uses the CONFIG_DDR_32BIT mode */
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#error "Add ECC POST support for CONFIG_DDR_32BIT here!"
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#else
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for (addr = (u64*)CONFIG_SYS_POST_ECC_START_ADDR, errbit=0;
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addr < (u64*)CONFIG_SYS_POST_ECC_STOP_ADDR; addr++, errbit++ ) {
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WATCHDOG_RESET();
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ecc_clear(ddr);
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/* Enable error injection */
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setbits_be32(&ddr->ecc_err_inject, ECC_ERR_INJECT_EIEN);
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sync();
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isync();
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/* Set bit to be injected */
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if (errbit < 32) {
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__raw_writel(1 << errbit, &ddr->data_err_inject_lo);
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__raw_writel(0, &ddr->data_err_inject_hi);
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} else {
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__raw_writel(0, &ddr->data_err_inject_lo);
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__raw_writel(1<<(errbit-32), &ddr->data_err_inject_hi);
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}
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sync();
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isync();
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/* Write memory location injecting SBE */
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ppcDWstore((u32*)addr, pattern);
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sync();
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/* Disable error injection */
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clrbits_be32(&ddr->ecc_err_inject, ECC_ERR_INJECT_EIEN);
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sync();
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isync();
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/* Data read should generate SBE */
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ppcDWload((u32*)addr, retval);
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sync();
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if (!(__raw_readl(&ddr->err_detect) & ECC_ERROR_DETECT_SBE) ||
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(__raw_readl(&ddr->data_err_inject_hi) !=
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(__raw_readl(&ddr->capture_data_hi) ^ pattern[0])) ||
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(__raw_readl(&ddr->data_err_inject_lo) !=
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(__raw_readl(&ddr->capture_data_lo) ^ pattern[1]))) {
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post_log("ECC failed to detect SBE error at %08x, "
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"SBE injection mask %08x-%08x, wrote "
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"%08x-%08x, read %08x-%08x\n", addr,
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ddr->data_err_inject_hi,
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ddr->data_err_inject_lo,
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pattern[0], pattern[1],
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retval[0], retval[1]);
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printf("ERR_DETECT Reg: %08x\n", ddr->err_detect);
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printf("ECC CAPTURE_DATA Reg: %08x-%08x\n",
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ddr->capture_data_hi, ddr->capture_data_lo);
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ret = 1;
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break;
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}
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/* Re-initialize the ECC memory */
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ppcDWstore((u32*)addr, writeback);
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sync();
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isync();
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errbit %= 63;
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}
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#endif /* !CONFIG_DDR_32BIT */
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ecc_clear(ddr);
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icache_disable();
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if (int_state)
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enable_interrupts();
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return ret;
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}
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#endif
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