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authorWolfgang Denk <wd@denx.de>2010-06-29 01:33:35 +0200
committerWolfgang Denk <wd@denx.de>2010-06-29 14:41:37 +0200
commit4ccd5510e50b5675227a1fe0e5ca099d333f637d (patch)
treeb1761f20c0495722e309a848c77cb48265bacdfb /arch/powerpc/cpu
parent482126e27b3dbf0e69a6445da8b94b3551adf05d (diff)
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MPC512x: workaround data corruption for unaligned local bus accesses
Commit 460c2ce3 "MPC5200: workaround data corruption for unaligned local bus accesses" fixed the problem for MPC5200 only, but MPC512x is affected as well, so apply the same fix here, too. Signed-off-by: Wolfgang Denk <wd@denx.de> Cc: Detlev Zundel <dzu@denx.de> Cc: Anatolij Gustschin <agust@denx.de> Acked-by: Detlev Zundel <dzu@denx.de>
Diffstat (limited to 'arch/powerpc/cpu')
-rw-r--r--arch/powerpc/cpu/mpc5xxx/Makefile5
-rw-r--r--arch/powerpc/cpu/mpc5xxx/memcpy_mpc5200.c71
2 files changed, 0 insertions, 76 deletions
diff --git a/arch/powerpc/cpu/mpc5xxx/Makefile b/arch/powerpc/cpu/mpc5xxx/Makefile
index 4ab2b7b..0ee0611 100644
--- a/arch/powerpc/cpu/mpc5xxx/Makefile
+++ b/arch/powerpc/cpu/mpc5xxx/Makefile
@@ -30,11 +30,6 @@ SOBJS = io.o firmware_sc_task_bestcomm.impl.o
COBJS = i2c.o traps.o cpu.o cpu_init.o ide.o interrupts.o \
loadtask.o pci_mpc5200.o serial.o speed.o usb_ohci.o usb.o
-# Workaround for local bus unaligned access problem on MPC5200
-#ifdef CONFIG_MPC5200
-COBJS += memcpy_mpc5200.o
-#endif
-
SRCS := $(START:.o=.S) $(SOBJS:.o=.S) $(COBJS:.o=.c)
OBJS := $(addprefix $(obj),$(SOBJS) $(COBJS))
START := $(addprefix $(obj),$(START))
diff --git a/arch/powerpc/cpu/mpc5xxx/memcpy_mpc5200.c b/arch/powerpc/cpu/mpc5xxx/memcpy_mpc5200.c
deleted file mode 100644
index 0950354..0000000
--- a/arch/powerpc/cpu/mpc5xxx/memcpy_mpc5200.c
+++ /dev/null
@@ -1,71 +0,0 @@
-/*
- * (C) Copyright 2010
- * 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
- */
-
-/*
- * This is a workaround for issues on the MPC5200, where unaligned
- * 32-bit-accesses to the local bus will deliver corrupted data. This
- * happens for example when trying to use memcpy() from an odd NOR
- * flash address; the behaviour can be also seen when using "md" on an
- * odd NOR flash address (but there it is not a bug in U-Boot, which
- * only shows the behaviour of this processor).
- *
- * For memcpy(), we test if either the source or the target address
- * are not 32 bit aligned, and - if so - if the source address is in
- * NOR flash: in this case we perform a byte-wise (slow) then; for
- * aligned operations of non-flash areas we use the optimized (fast)
- * real __memcpy(). This way we minimize the performance impact of
- * this workaround.
- *
- */
-
-#include <common.h>
-#include <flash.h>
-#include <linux/types.h>
-
-void *memcpy(void *trg, const void *src, size_t len)
-{
- extern void* __memcpy(void *, const void *, size_t);
- char *s = (char *)src;
- char *t = (char *)trg;
- void *dest = (void *)src;
-
- /*
- * Check is source address is in flash:
- * If not, we use the fast assembler code
- */
- if (((((unsigned long)s & 3) == 0) /* source aligned */
- && /* AND */
- (((unsigned long)t & 3) == 0)) /* target aligned, */
- || /* or */
- (addr2info((ulong)s) == NULL)) { /* source not in flash */
- return __memcpy(trg, src, len);
- }
-
- /*
- * Copying from flash, perform byte by byte copy.
- */
- while (len-- > 0)
- *t++ = *s++;
-
- return dest;
-}