ramstartup.s

Windows CE 6.0 BSP for the Beagle Board.

;
; Copyright (c) Special Computing.  All rights reserved. 
; Copyright (c) Microsoft Corporation.  All rights reserved.
; Portions Copyright (c) Texas Instruments.  All rights reserved. 
; Portions Copyright (c) Intrinsyc Software.  All rights reserved. 
;
;------------------------------------------------------------------------------
;
;   File:  ramstartup.s
;
;   Boot startup routine for OMAP3530 BeagleBoard.
;

        INCLUDE kxarm.h
        
        IMPORT  BootloaderMain

        STARTUPTEXT
        
;-------------------------------------------------------------------------------
;
;  Function:  StartUp
;
;  This function is entry point to Windows CE EBOOT. It should be called
;  in state with deactivated MMU and disabled caches.
;
;  Note that g_oalAddressTable is needed for OEMMapMemAddr because
;  downloaded image is placed on virtual addresses (but EBOOT runs without
;  MMU).
;
        LEAF_ENTRY StartUp

        ;---------------------------------------------------------------
        ; Jump to BootMain
        ;---------------------------------------------------------------

;		b		flash_USER0_LED

;        ldr     sp, =(0x87060000 + IMAGE_EBOOT_STACK_SIZE)

; turn off I/D-cache
		mrc		p15, 0, r1, c1, c0, 0
		bic		r1, r1, #0x1000
		bic		r1, r1, #0x0004
		mcr		p15, 0, r1, c1, c0, 0

; turn off l2 cache
; ES2 and up we can disable/enable L2
		mrc		p15, 0, r1, c1, c0, 1
		bic		r1, r1, #0x2
		mcr		p15, 0, r1, c1, c0, 1

        b       BootloaderMain

flash_USER0_LED
		ldr		r0, =0x00400000			; USER1 LED on GPIO_149
		ldr		r1, =0x49056090			; clear bit location
		ldr		r2, =0x49056094			; set bit location
11		str 	r0, [r1]				; off
		ldr     r3, =0x03ffffff			; STALL
20		subs    r3, r3, #1
		bne     %B20
		str 	r0, [r2]				; on
		ldr     r3, =0x03ffffff			; STALL
25		subs    r3, r3, #1
		bne     %B25
		b		%b11

        ; Include memory configuration file with g_oalAddressTable
        INCLUDE addrtab_cfg.inc

        ENTRY_END 

        END

;------------------------------------------------------------------------------