diff options
Diffstat (limited to 'arch/powerpc/lib')
| -rw-r--r-- | arch/powerpc/lib/Makefile | 13 | ||||
| -rw-r--r-- | arch/powerpc/lib/bootcount.c | 5 | ||||
| -rw-r--r-- | arch/powerpc/lib/bootm.c | 4 | ||||
| -rw-r--r-- | arch/powerpc/lib/kgdb.c | 2 | ||||
| -rw-r--r-- | arch/powerpc/lib/memcpy_mpc5200.c | 71 |
5 files changed, 92 insertions, 3 deletions
diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile index 5f85502d1c..2065b6d807 100644 --- a/arch/powerpc/lib/Makefile +++ b/arch/powerpc/lib/Makefile @@ -40,6 +40,19 @@ COBJS-y += interrupts.o COBJS-$(CONFIG_CMD_KGDB) += kgdb.o COBJS-y += time.o +# Workaround for local bus unaligned access problems +# on MPC512x and MPC5200 +ifdef CONFIG_MPC512X +$(obj)ppcstring.o: AFLAGS += -Dmemcpy=__memcpy +COBJS-y += memcpy_mpc5200.o +endif +ifdef CONFIG_MPC5200 +$(obj)ppcstring.o: AFLAGS += -Dmemcpy=__memcpy +COBJS-y += memcpy_mpc5200.o +endif + +COBJS += $(sort $(COBJS-y)) + SRCS := $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c) OBJS := $(addprefix $(obj),$(SOBJS-y) $(COBJS-y)) diff --git a/arch/powerpc/lib/bootcount.c b/arch/powerpc/lib/bootcount.c index 338c8486d7..07ef28d1b4 100644 --- a/arch/powerpc/lib/bootcount.c +++ b/arch/powerpc/lib/bootcount.c @@ -35,6 +35,11 @@ #define CONFIG_SYS_BOOTCOUNT_SINGLEWORD #endif /* defined(CONFIG_MPC5xxx) */ +#if defined(CONFIG_MPC512X) +#define CONFIG_SYS_BOOTCOUNT_ADDR (&((immap_t *)CONFIG_SYS_IMMR)->clk.bcr) +#define CONFIG_SYS_BOOTCOUNT_SINGLEWORD +#endif /* defined(CONFIG_MPC512X) */ + #if defined(CONFIG_8xx) #define CONFIG_SYS_BOOTCOUNT_ADDR (((immap_t *)CONFIG_SYS_IMMR)->im_cpm.cp_dpmem + \ CPM_BOOTCOUNT_ADDR) diff --git a/arch/powerpc/lib/bootm.c b/arch/powerpc/lib/bootm.c index 6702df51a5..3064121143 100644 --- a/arch/powerpc/lib/bootm.c +++ b/arch/powerpc/lib/bootm.c @@ -47,7 +47,7 @@ DECLARE_GLOBAL_DATA_PTR; -extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]); +extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); extern ulong get_effective_memsize(void); static ulong get_sp (void); static void set_clocks_in_mhz (bd_t *kbd); @@ -297,7 +297,7 @@ static int boot_body_linux(bootm_headers_t *images) } __attribute__((noinline)) -int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images) +int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images) { int ret; diff --git a/arch/powerpc/lib/kgdb.c b/arch/powerpc/lib/kgdb.c index d3eb1f35a9..1ec68184bf 100644 --- a/arch/powerpc/lib/kgdb.c +++ b/arch/powerpc/lib/kgdb.c @@ -313,7 +313,7 @@ kgdb_putregs(struct pt_regs *regs, char *buf, int length) the debugger. */ void -kgdb_breakpoint(int argc, char *argv[]) +kgdb_breakpoint(int argc, char * const argv[]) { asm(" .globl breakinst\n\ breakinst: .long 0x7d821008\n\ diff --git a/arch/powerpc/lib/memcpy_mpc5200.c b/arch/powerpc/lib/memcpy_mpc5200.c new file mode 100644 index 0000000000..09503548aa --- /dev/null +++ b/arch/powerpc/lib/memcpy_mpc5200.c @@ -0,0 +1,71 @@ +/* + * (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; +} |