microwatt: Implement boot helper

diff --git a/litex/soc/cores/cpu/microwatt/boot-helper.S b/litex/soc/cores/cpu/microwatt/boot-helper.S
index 8dc226df0af9d45bf318c1e089cb9e67b0524771..bc2b0395b3d6628aa5e0baa8712d14f0c80572cd 100644 (file)
--- a/litex/soc/cores/cpu/microwatt/boot-helper.S
+++ b/litex/soc/cores/cpu/microwatt/boot-helper.S
@@ -1,4 +1,7 @@
 .section    .text, "ax", @progbits
 .global     boot_helper
+// void boot_helper(unsigned long r1, unsigned long r2, unsigned long r3, unsigned long addr)
 boot_helper:
-       nop # FIXME
+       mtctr   %r6,
+       bctrl
+       ba      0