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authorMike Frysinger <vapier@gentoo.org>2009-05-26 23:34:51 +0000
committerMike Frysinger <vapier@gentoo.org>2009-06-12 06:11:53 -0400
commit79df1b69471b5ea4be8285c9dc6ab05cdf5a85d7 (patch)
tree68c1523328187f39b2ee44fcc39cfadbcb204664 /arch
parent37082511f06108129bd5f96d625a6fae2d5a4ab4 (diff)
downloadlinux-2.6.34-ux500-79df1b69471b5ea4be8285c9dc6ab05cdf5a85d7.tar.gz
Blackfin: override default uClinux MTD addr/size
Due to a processor anomaly (05000263 to be exact), most Blackfin parts cannot keep the embedded filesystem image directly after the kernel in RAM. Instead, the filesystem needs to be relocated to the end of memory. As such, we need to tweak the map addr/size during boot for Blackfin systems. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/blackfin/kernel/setup.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c
index dc30e0aa54c..80447f99c2b 100644
--- a/arch/blackfin/kernel/setup.c
+++ b/arch/blackfin/kernel/setup.c
@@ -18,9 +18,12 @@
#include <linux/tty.h>
#include <linux/pfn.h>
+#ifdef CONFIG_MTD_UCLINUX
+#include <linux/mtd/map.h>
#include <linux/ext2_fs.h>
#include <linux/cramfs_fs.h>
#include <linux/romfs_fs.h>
+#endif
#include <asm/cplb.h>
#include <asm/cacheflush.h>
@@ -45,6 +48,7 @@ EXPORT_SYMBOL(_ramend);
EXPORT_SYMBOL(reserved_mem_dcache_on);
#ifdef CONFIG_MTD_UCLINUX
+extern struct map_info uclinux_ram_map;
unsigned long memory_mtd_end, memory_mtd_start, mtd_size;
unsigned long _ebss;
EXPORT_SYMBOL(memory_mtd_end);
@@ -535,10 +539,9 @@ static __init void memory_setup(void)
}
/* Relocate MTD image to the top of memory after the uncached memory area */
- dma_memcpy((char *)memory_end, _end, mtd_size);
-
- memory_mtd_start = memory_end;
- _ebss = memory_mtd_start; /* define _ebss for compatible */
+ uclinux_ram_map.phys = memory_mtd_start = memory_end;
+ uclinux_ram_map.size = mtd_size;
+ dma_memcpy((void *)uclinux_ram_map.phys, _end, uclinux_ram_map.size);
#endif /* CONFIG_MTD_UCLINUX */
#if (defined(CONFIG_BFIN_ICACHE) && ANOMALY_05000263)