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Re: Modifying SDRAM Size in Redboot



>>> m a <aasay2003@yahoo.com> 08/24/04 02:42PM >>>

Hi,

In our custom board we have SDRAM of size 32 MB. In
Redboot what are all the files i should change to
reflect this.
I made changes in hal_platform_extras.h and ixdp425.h
file  as below . 

#if defined(CYG_HAL_STARTUP_ROM) || defined(CYG_HAL_STARTUP_ROMRAM)
#if defined(CYG_HAL_STARTUP_ROMRAM)
        .section .text
        .ltorg
        .p2align 13
#else
        .section .mmu_tables, "a"
#endif

    mmu_table:
//  This page table sets up the preferredmapping: 
//
//  Virtual Address   Physical Address  XCB Size (MB)  Description
//  ---------------   ----------------  --- ---------  -----------
//     0x00000000       0x00000000      010    32     SDRAM (cached)
//     0x10000000       0x10000000      010    32     SDRAM (alias)
//     0x20000000       0x00000000      000    32    SDRAM (uncached)
//     0x48000000       0x48000000      000     64     PCI Data
//     0x50000000       0x50000000      010     16     Flash (CS0)
//     0x51000000       0x51000000      000    112     CS1 - CS7
//     0x60000000       0x60000000      000      64    Queue Manager
//     0xC0000000       0xC0000000      000       1    PCI Controller
//     0xC4000000       0xC4000000      000       1    Exp. Bus Config
//     0xC8000000       0xC8000000      000       1    Misc IXP425 IO
//     0xCC000000       0xCC000000      000       1    SDRAM Config

	// 32MB SDRAM
	.set	__base,0x000
	.rept	0x20 - 0x000
	FL_SECTION_ENTRY __base,0,3,0,0,1,0
	.set	__base,__base+1
	.endr

	// 32MB SDRAM (alias)
	.rept	0x120 - 0x100
	FL_SECTION_ENTRY __base,0,3,0,0,1,0
	.set	__base,__base+1
	.endr

	// 32MB SDRAM (uncached)
	.set	__base,0x000
	.rept	0x220 - 0x200
	FL_SECTION_ENTRY __base,0,3,0,0,0,0
	.set	__base,__base+1
	.endr

	// 384MB Unused
	.set	__base,0x300
	.rept	0x480 - 0x300
	.word 0
	.set	__base,__base+1
	.endr


I changed the SDRAM_SIZE macro to 0x2000000 in the
IXDP425.h file and also the SDRAM_CONFIG_BASE register
to reflect this size change.

What more should i do and i want to verify the change
by seeing the SYMBOL MAP file. I want to see the HEAP
and STACK section in the SYMBOL MAP file. Where can i
find the MAP file in redboot.


Gsat


		
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