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Commit fa254ecb authored by Mike Frysinger's avatar Mike Frysinger Committed by David Woodhouse
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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: default avatarMike Frysinger <vapier@gentoo.org>
CC: Paul Mundt <lethal@linux-sh.org>
CC: Greg Ungerer <gerg@uclinux.org>
CC: uclinux-dev@uclinux.org
CC: linux-mtd@lists.infradead.org
Signed-off-by: default avatarArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: default avatarDavid Woodhouse <David.Woodhouse@intel.com>
parent c3a9f356

drivers/mtd/maps/uclinux.c

+6 −4
Original line number Diff line number Diff line
@@ -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",