Re: [RFC][POWERPC] bootwrapper: Add a firmware-independent simpleboot target.

From: Grant Likely <redacted>

This target produces a flat binary rather than an ELF file,
fixes the entry point at the beginning of the image, and takes
a complete device tree with no fixups needed.

Based on 'raw' target written by Scott Wood.

Signed-off-by: Grant Likely <redacted>
---

diff --git a/arch/powerpc/boot/io.h b/arch/powerpc/boot/io.h
index ccaedae..ec57ec9 100644
--- a/arch/powerpc/boot/io.h
+++ b/arch/powerpc/boot/io.h

@@ -99,4 +99,11 @@ static inline void barrier(void)
        asm volatile("" : : : "memory");
 }

+static inline void disable_irq(void)
+{
+       int dummy;
+       asm volatile("mfmsr %0; rlwinm %0, %0, 0, ~(1<<15); mtmsr %0" :
+                    "=r" (dummy) : : "memory");
+}
+
 #endif /* _IO_H */