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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: Greg Ungerer <gerg@uclinux.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Greg Ungerer 2005-09-02 10:42:52 +10:00 committed by Linus Torvalds
parent e6070a1712
commit 029fc1375f
1 changed files with 12 additions and 3 deletions
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15
arch/m68knommu/platform/5307/head.S
View File

@ -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 */
#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 */
/*