From fa254ecbcca713a4aec99478e79f858942b3d4e0 Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Tue, 26 May 2009 19:33:16 -0400 Subject: mtd: uclinux: allow systems to override map 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. This can be done in any early arch/board init code. Signed-off-by: Mike Frysinger CC: Paul Mundt CC: Greg Ungerer CC: uclinux-dev@uclinux.org CC: linux-mtd@lists.infradead.org Signed-off-by: Artem Bityutskiy Signed-off-by: David Woodhouse --- drivers/mtd/maps/uclinux.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) (limited to 'drivers/mtd/maps/uclinux.c') diff --git a/drivers/mtd/maps/uclinux.c b/drivers/mtd/maps/uclinux.c index 81756e397711..61d4087dd8f7 100644 --- a/drivers/mtd/maps/uclinux.c +++ b/drivers/mtd/maps/uclinux.c @@ -22,8 +22,12 @@ /****************************************************************************/ +extern char _ebss; + struct map_info uclinux_ram_map = { .name = "RAM", + .phys = (unsigned long)&_ebss, + .size = 0, }; struct mtd_info *uclinux_ram_mtdinfo; @@ -55,12 +59,10 @@ static int __init uclinux_mtd_init(void) { struct mtd_info *mtd; struct map_info *mapp; - extern char _ebss; - unsigned long addr = (unsigned long) &_ebss; mapp = &uclinux_ram_map; - mapp->phys = addr; - mapp->size = PAGE_ALIGN(ntohl(*((unsigned long *)(addr + 8)))); + if (!mapp->size) + mapp->size = PAGE_ALIGN(ntohl(*((unsigned long *)(mapp->phys + 8)))); mapp->bankwidth = 4; printk("uclinux[mtd]: RAM probe address=0x%x size=0x%x\n", -- cgit v1.2.3-59-g8ed1b