interrupts, timers, under construction

[rpikern] / src / startup.s

diff --git a/src/startup.s b/src/startup.s
index 30e2a66..587ab95 100644 (file)
--- a/src/startup.s
+++ b/src/startup.s
@@ -3,11 +3,16 @@
        .section .startup
        .code 32
 
+       .global startup
+startup:
+       @ stop all but one of the cores
+       mrc p15, 0, r0, c0, c0, 5
+       ands r0, r0, #0xff
+       bne exit
+
+       @ setup stack
        ldr sp, =_stacktop
 
-       mov r0, #1
-       bl dbgled
-
        @ clear bss
        ldr r0, =_bss_start
        ldr r1, =_bss_size
@@ -18,25 +23,10 @@
        subs r1, #4
        bne 0b
 1:
-       bl main
-
-       mov r0, #0
-       bl dbgled
-
-halt:  wfe
-       b halt
+       blx main
 
-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
-       lsl r2, #1
-       strne r2, [r3, #0x1c]   @ GPSET0
-       streq r2, [r3, #0x28]   @ GPCLR0
-       bx lr
+       .global exit
+exit:  wfe
+       b exit
 
 @ vi:set filetype=armasm: