diff nuc-fw/sysglue/sysinit.S @ 79:947b1f473960

beginning of nuc-fw
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Sun, 11 Aug 2013 07:17:25 +0000
parents
children 39b1c369b67f
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nuc-fw/sysglue/sysinit.S	Sun Aug 11 07:17:25 2013 +0000
@@ -0,0 +1,41 @@
+/*
+ * 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
+	.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
+	.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:	ldm	r8!, {r0-r7}
+	stm	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