Commit yaboot 1.3.0

[yaboot.git] / second / crt0.S

diff --git a/second/crt0.S b/second/crt0.S
new file mode 100644 (file)
index 0000000..f06fe54
--- /dev/null
+++ b/second/crt0.S
@@ -0,0 +1,32 @@
+#include "asm/ppc_asm.tmpl"
+#include "asm/processor.h"
+
+/*
+ * Main entry point. should add code to clear BSS and more ...
+ */
+_GLOBAL(_start)
+       lis     r10,edata@h
+       ori     r10,r10,edata@l
+       lis     r11,end@h
+       ori     r11,r11,end@l
+       subi    r10,r10,4
+       subi    r11,r11,4
+       li      r0, 0
+1:     stwu    r0,4(r10)
+       cmp     0,r10,r11
+       bne     1b
+       b       yaboot_start
+
+/*
+ * Returns (address we're running at) - (address we were linked at)
+ * for use before the text and data are mapped to KERNELBASE.
+ */
+_GLOBAL(reloc_offset)
+       mflr    r0
+       bl      1f
+1:     mflr    r3
+       lis     r4,1b@ha
+       addi    r4,r4,1b@l
+       subf    r3,r4,r3
+       mtlr    r0
+       blr