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Commit 10e8e1fb authored by Andrew Victor's avatar Andrew Victor Committed by Russell King
Browse files

[ARM] 3581/1: AT91RM9200 Internal SRAM 



Patch from Andrew Victor

This patch maps the AT91RM9200's internal SRAM into the virtual memory
address space - just below the internal peripheral registers.

Signed-off-by: default avatarAndrew Victor <andrew@sanpeople.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 2a6f9902

arch/arm/mach-at91rm9200/common.c

+6 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
#include <asm/mach/map.h>



#include <asm/arch/hardware.h>

#include "generic.h"



static struct map_desc at91rm9200_io_desc[] __initdata = {

	{
@@ -94,6 +95,11 @@ static struct map_desc at91rm9200_io_desc[] __initdata = { 
		.pfn		= __phys_to_pfn(AT91_BASE_TCB0),

		.length		= SZ_16K,

		.type		= MT_DEVICE,

	}, {

		.virtual	= AT91_SRAM_VIRT_BASE,

		.pfn		= __phys_to_pfn(AT91_SRAM_BASE),

		.length		= AT91_SRAM_SIZE,

		.type		= MT_DEVICE,

	},

};

include/asm-arm/arch-at91rm9200/hardware.h

+4 −1
Original line number Diff line number Diff line
@@ -50,9 +50,12 @@ 
#define AT91_VA_BASE_TCB0	AT91_IO_P2V(AT91_BASE_TCB0)



/* Internal SRAM */

#define AT91_BASE_SRAM		0x00200000	/* Internal SRAM base address */

#define AT91_SRAM_BASE		0x00200000	/* Internal SRAM base address */

#define AT91_SRAM_SIZE		0x00004000	/* Internal SRAM SIZE (16Kb) */



 /* Internal SRAM is mapped below the IO devices */

#define AT91_SRAM_VIRT_BASE	(AT91_IO_VIRT_BASE - AT91_SRAM_SIZE)



/* Serial ports */

#define AT91_NR_UART		5		/* 4 USART3's and one DBGU port */

include/asm-arm/arch-at91rm9200/vmalloc.h

+1 −1
Original line number Diff line number Diff line
@@ -21,6 +21,6 @@ 
#ifndef __ASM_ARCH_VMALLOC_H

#define __ASM_ARCH_VMALLOC_H



#define VMALLOC_END		(AT91_IO_VIRT_BASE & PGDIR_MASK)

#define VMALLOC_END		(AT91_SRAM_VIRT_BASE & PGDIR_MASK)



#endif