diff options
Diffstat (limited to 'arch/powerpc/cpu/mpc5xxx')
| -rw-r--r-- | arch/powerpc/cpu/mpc5xxx/Makefile | 5 | ||||
| -rw-r--r-- | arch/powerpc/cpu/mpc5xxx/memcpy_mpc5200.c | 71 |
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; -} |