view nuc-fw/sysglue/sysinit.S @ 107:8b44e806b6e1

loadtools/README: documentation for loadtools should now be complete
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Fri, 13 Sep 2013 16:47:09 +0000
parents 321f6a9ae989
children 2c5160a9d652
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/*
 * This assembly module, which puts bits of code into several different
 * sections, contains those essential entry point etc bits which are common
 * to both the regular flashable build and the fc-xram development build.
 */

	.section	iram.vectors,"ax",%progbits
	.code	32
/* no useful handlers for the 5 error exceptions yet */
	b	.
	b	.
	b	.
	b	.
	b	.
/* IRQ */
	b	_INT_IRQ
/* no useful FIQ handler yet */
	b	.

	.section	xip.text,"ax",%progbits
	.code	32
	.globl	_FlashorXram_entry
_FlashorXram_entry:
/* first order of business: copy iram.text to where it's supposed to be */
	ldr	r8, =__iramtext_flash_addr
	ldr	r9, =__iramtext_ram_addr
	ldr	r10, =__iramtext_size
1:	ldmia	r8!, {r0-r7}
	stmia	r9!, {r0-r7}
	subs	r10, r10, #0x20
	bhi	1b
/* now we can call any function w/o worry as to where it lives */
/* clear int.bss and ext.bss, using bzero() from libc */
	ldr	r0, =__intbss_start
	ldr	r1, =__intbss_size
	bl	bzero
	ldr	r0, =__extbss_start
	ldr	r1, =__extbss_size
	bl	bzero
/* we can start Nucleus now! */
	b	INT_Initialize