1 files changed, 57 insertions, 0 deletions

diff --git a/arch/powerpc/platforms/44x/misc_44x.S b/arch/powerpc/platforms/44x/misc_44x.S
new file mode 100644
index 00000000000..3bce71d5d75
--- /dev/null
+++ b/arch/powerpc/platforms/44x/misc_44x.S
@@ -0,0 +1,57 @@
+/*
+ * This file contains miscellaneous low-level functions for PPC 44x.
+ *    Copyright 2007 David Gibson <dwg@au1.ibm.com>, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ */
+
+#include <asm/reg.h>
+#include <asm/ppc_asm.h>
+
+        .text
+
+/*
+ * Do an IO access in AS1
+ */
+_GLOBAL(as1_readb)
+        mfmsr   r7
+        ori     r0,r7,MSR_DS
+        sync
+        mtmsr   r0
+        sync
+        isync
+        lbz     r3,0(r3)
+        sync
+        mtmsr   r7
+        sync
+        isync
+        blr
+
+_GLOBAL(as1_writeb)
+        mfmsr   r7
+        ori     r0,r7,MSR_DS
+        sync
+        mtmsr   r0
+        sync
+        isync
+        stb     r3,0(r4)
+        sync
+        mtmsr   r7
+        sync
+        isync
+        blr
+
+/*
+ * void ppc44x_reset_system(char *cmd)
+ *
+ * At present, this routine just applies a system reset.
+ */
+_GLOBAL(ppc44x_reset_system)
+        mfspr   r13,SPRN_DBCR0
+        oris    r13,r13,DBCR0_RST_SYSTEM@h
+        mtspr   SPRN_DBCR0,r13
+        b       .                       /* Just in case the reset doesn't work */