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Commit 029fc137 authored by Greg Ungerer's avatar Greg Ungerer Committed by Linus Torvalds
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[PATCH] m68knommu: fix ColdFire startup code to properly handle non 0 based ram 



Correctly determine the end of ram for ram setups that do not
start at base address of 0. Add support for the MOD5272 board,
which doesn not have a ram base of 0.

Signed-off-by: default avatarGreg Ungerer <gerg@uclinux.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent e6070a17

arch/m68knommu/platform/5307/head.S

+12 −3
Original line number Diff line number Diff line
@@ -39,14 +39,18 @@ 
 *	Memory size exceptions for special cases. Some boards may be set

 *	for auto memory sizing, but we can't do it that way for some reason.

 *	For example the 5206eLITE board has static RAM, and auto-detecting

 *	the SDRAM will do you no good at all.

 *	the SDRAM will do you no good at all. Same goes for the MOD5272.

 */

#ifdef CONFIG_RAMAUTO

#if defined(CONFIG_M5206eLITE)

#define	MEM_SIZE	0x00100000	/* 1MiB default memory */

#endif

#if defined(CONFIG_MOD5272)

#define MEM_SIZE	0x00800000	/* 8MiB default memory */

#endif

#endif /* CONFIG_RAMAUTO */





/*

 *	If we don't have a fixed memory size now, then lets build in code

 *	to auto detect the DRAM size. Obviously this is the prefered
@@ -100,11 +104,15 @@ 


/*

 *	Most ColdFire boards have their DRAM starting at address 0.

 *	Notable exception is the 5206eLITE board.

 *	Notable exception is the 5206eLITE board, another is the MOD5272.

 */

#if defined(CONFIG_M5206eLITE)

#define	MEM_BASE	0x30000000

#endif

#if defined(CONFIG_MOD5272)

#define MEM_BASE	0x02000000

#define VBR_BASE	0x20000000	/* vectors in SRAM */

#endif



#ifndef MEM_BASE

#define	MEM_BASE	0x00000000	/* memory base at address 0 */
@@ -188,6 +196,7 @@ _start: 
	movel	%a7,_rambase



	GET_MEM_SIZE				/* macro code determines size */

	addl	%a7,%d0

	movel	%d0,_ramend			/* set end ram addr */



	/*