POST: Added ECC memory test for mpc83xx.

Signed-off-by: Michael Zaidman <michael.zaidman@gmail.com>
Fixed minor coding style issue.
Signed-off-by: Wolfgang Denk <wd@denx.de>

diff --git a/post/cpu/mpc83xx/Makefile b/post/cpu/mpc83xx/Makefile
new file mode 100644 (file)
index 0000000..86d8784
--- /dev/null
+++ b/post/cpu/mpc83xx/Makefile
@@ -0,0 +1,30 @@
+#
+# (C) Copyright 2002-2007
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+include $(OBJTREE)/include/autoconf.mk
+
+LIB    = libpostmpc83xx.a
+
+AOBJS-$(CONFIG_HAS_POST)       +=
+COBJS-$(CONFIG_HAS_POST)       += ecc.o
+
+include $(TOPDIR)/post/rules.mk

diff --git a/post/cpu/mpc83xx/ecc.c b/post/cpu/mpc83xx/ecc.c
new file mode 100644 (file)
index 0000000..de87339
--- /dev/null
+++ b/post/cpu/mpc83xx/ecc.c
@@ -0,0 +1,166 @@
+/*
+ * (C) Copyright 2010
+ * Eastman Kodak Company, <www.kodak.com>
+ * Michael Zaidman, <michael.zaidman@kodak.com>
+ *
+ * The code is based on the cpu/mpc83xx/ecc.c written by
+ * Dave Liu <daveliu@freescale.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <mpc83xx.h>
+#include <watchdog.h>
+#include <asm/io.h>
+#include <post.h>
+
+#if CONFIG_POST & CONFIG_SYS_POST_ECC
+/*
+ * We use the RAW I/O accessors where possible in order to
+ * achieve performance goal, since the test's execution time
+ * affects the board start up time.
+ */
+static inline void ecc_clear(ddr83xx_t *ddr)
+{
+       /* Clear capture registers */
+       __raw_writel(0, &ddr->capture_address);
+       __raw_writel(0, &ddr->capture_data_hi);
+       __raw_writel(0, &ddr->capture_data_lo);
+       __raw_writel(0, &ddr->capture_ecc);
+       __raw_writel(0, &ddr->capture_attributes);
+
+       /* Clear SBEC and set SBET to 1 */
+       out_be32(&ddr->err_sbe, 1 << ECC_ERROR_MAN_SBET_SHIFT);
+
+       /* Clear Error Detect register */
+       out_be32(&ddr->err_detect, ECC_ERROR_DETECT_MME |\
+                       ECC_ERROR_DETECT_MBE |\
+                       ECC_ERROR_DETECT_SBE |\
+                       ECC_ERROR_DETECT_MSE);
+
+       isync();
+}
+
+int ecc_post_test(int flags)
+{
+       int ret = 0;
+       int int_state;
+       int errbit;
+       u32 pattern[2], writeback[2], retval[2];
+       ddr83xx_t *ddr = &((immap_t *)CONFIG_SYS_IMMR)->ddr;
+       volatile u64 *addr = (u64 *)CONFIG_SYS_POST_ECC_START_ADDR;
+
+       /* The pattern is written into memory to generate error */
+       pattern[0] = 0xfedcba98UL;
+       pattern[1] = 0x76543210UL;
+
+       /* After injecting error, re-initialize the memory with the value */
+       writeback[0] = ~pattern[0];
+       writeback[1] = ~pattern[1];
+
+       /* Check if ECC is enabled */
+       if (__raw_readl(&ddr->err_disable) & ECC_ERROR_ENABLE) {
+               debug("DDR's ECC is not enabled, skipping the ECC POST.\n");
+               return 0;
+       }
+
+       int_state = disable_interrupts();
+       icache_enable();
+
+#ifdef CONFIG_DDR_32BIT
+       /* It seems like no one really uses the CONFIG_DDR_32BIT mode */
+#error "Add ECC POST support for CONFIG_DDR_32BIT here!"
+#else
+       for (addr = (u64*)CONFIG_SYS_POST_ECC_START_ADDR, errbit=0;
+            addr < (u64*)CONFIG_SYS_POST_ECC_STOP_ADDR; addr++, errbit++ ) {
+
+               WATCHDOG_RESET();
+
+               ecc_clear(ddr);
+
+               /* Enable error injection */
+               setbits_be32(&ddr->ecc_err_inject, ECC_ERR_INJECT_EIEN);
+               sync();
+               isync();
+
+               /* Set bit to be injected */
+               if (errbit < 32) {
+                       __raw_writel(1 << errbit, &ddr->data_err_inject_lo);
+                       __raw_writel(0, &ddr->data_err_inject_hi);
+               } else {
+                       __raw_writel(0, &ddr->data_err_inject_lo);
+                       __raw_writel(1<<(errbit-32), &ddr->data_err_inject_hi);
+               }
+               sync();
+               isync();
+
+               /* Write memory location injecting SBE */
+               ppcDWstore((u32*)addr, pattern);
+               sync();
+
+               /* Disable error injection */
+               clrbits_be32(&ddr->ecc_err_inject, ECC_ERR_INJECT_EIEN);
+               sync();
+               isync();
+
+               /* Data read should generate SBE */
+               ppcDWload((u32*)addr, retval);
+               sync();
+
+               if (!(__raw_readl(&ddr->err_detect) & ECC_ERROR_DETECT_SBE) ||
+                       (__raw_readl(&ddr->data_err_inject_hi) !=
+                       (__raw_readl(&ddr->capture_data_hi) ^ pattern[0])) ||
+                       (__raw_readl(&ddr->data_err_inject_lo) !=
+                       (__raw_readl(&ddr->capture_data_lo) ^ pattern[1]))) {
+
+                       post_log("ECC failed to detect SBE error at %08x, "
+                               "SBE injection mask %08x-%08x, wrote "
+                               "%08x-%08x, read %08x-%08x\n", addr,
+                               ddr->data_err_inject_hi,
+                               ddr->data_err_inject_lo,
+                               pattern[0], pattern[1],
+                               retval[0], retval[1]);
+
+                       printf("ERR_DETECT Reg: %08x\n", ddr->err_detect);
+                       printf("ECC CAPTURE_DATA Reg: %08x-%08x\n",
+                               ddr->capture_data_hi, ddr->capture_data_lo);
+                       ret = 1;
+                       break;
+               }
+
+               /* Re-initialize the ECC memory */
+               ppcDWstore((u32*)addr, writeback);
+               sync();
+               isync();
+
+               errbit %= 63;
+       }
+#endif /* !CONFIG_DDR_32BIT */
+
+       ecc_clear(ddr);
+
+       icache_disable();
+
+       if (int_state)
+               enable_interrupts();
+
+       return ret;
+}
+#endif