X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=rpikern;a=blobdiff_plain;f=src%2Fstartup.s;h=7765ede46d9a56f27b3ae9b3436d6e654f5080fb;hp=30e2a6676a7b12c327dc184f7a19a703b1546310;hb=e848811902a51b67dedb6f6325dda19a6f21e820;hpb=4cdb0feb633bc6181644704cea8f18368b5bcfd1

diff --git a/src/startup.s b/src/startup.s
index 30e2a66..7765ede 100644
--- a/src/startup.s
+++ b/src/startup.s
@@ -3,10 +3,14 @@
 	.section .startup
 	.code 32
 
-	ldr sp, =_stacktop
+startup:
+	@ stop all but one of the cores
+	mrc p15, 0, r0, c0, c0, 5
+	ands r0, r0, #0xff
+	bne exit
 
-	mov r0, #1
-	bl dbgled
+	@ setup stack
+	ldr sp, =_stacktop
 
 	@ clear bss
 	ldr r0, =_bss_start
@@ -18,23 +22,23 @@
 	subs r1, #4
 	bne 0b
 1:
-	bl main
-
-	mov r0, #0
-	bl dbgled
+	blx main
 
-halt:	wfe
-	b halt
+	.global exit
+exit:	wfe
+	b exit
 
+	.global dbgled
 dbgled:
 	ldr r3, =0x3f200000	@ gpio base
 	ldr r2, =0x9000		@ gpio 24 and 25 -> output
 	str r2, [r3, #8]	@ store to GPFSEL2
 	ldr r2, =0x01000000	@ bit 24
-	teq r0, #0
-	streq r2, [r3, #0x1c]	@ GPSET0
-	strne r2, [r3, #0x28]	@ GPCLR0
+	tst r0, #1
+	strne r2, [r3, #0x1c]	@ GPSET0
+	streq r2, [r3, #0x28]	@ GPCLR0
 	lsl r2, #1
+	tst r0, #2
 	strne r2, [r3, #0x1c]	@ GPSET0
 	streq r2, [r3, #0x28]	@ GPCLR0
 	bx lr