[PATCH] powerpc: Moved dcr support to arch/powerpc

Signed-off-by: Kumar K. Gala <kumar.gala@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

2 files changed, 43 insertions, 0 deletions

diff --git a/arch/powerpc/sysdev/Makefile b/arch/powerpc/sysdev/Makefile
index 97119c0ffc72..d071ae875e25 100644
--- a/arch/powerpc/sysdev/Makefile
+++ b/arch/powerpc/sysdev/Makefile
@@ -2,3 +2,5 @@ obj-$(CONFIG_MPIC)		+= mpic.o
 obj-$(CONFIG_PPC_INDIRECT_PCI)  += indirect_pci.o
 obj-$(CONFIG_PPC_I8259)         += i8259.o
 obj-$(CONFIG_PPC_MPC106)        += grackle.o
+obj-$(CONFIG_BOOKE)             += dcr.o
+obj-$(CONFIG_40x)               += dcr.o
diff --git a/arch/powerpc/sysdev/dcr.S b/arch/powerpc/sysdev/dcr.S
new file mode 100644
index 000000000000..895f10243a43
--- /dev/null
+++ b/arch/powerpc/sysdev/dcr.S
@@ -0,0 +1,41 @@
+/*
+ * arch/ppc/syslib/dcr.S
+ *
+ * "Indirect" DCR access
+ *
+ * Copyright (c) 2004 Eugene Surovegin <ebs@ebshome.net>
+ *
+ * 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/ppc_asm.h>
+#include <asm/processor.h>
+
+#define DCR_ACCESS_PROLOG(table) \
+        rlwinm  r3,r3,4,18,27;   \
+        lis     r5,table@h;      \
+        ori     r5,r5,table@l;   \
+        add     r3,r3,r5;        \
+        mtctr   r3;              \
+        bctr
+
+_GLOBAL(__mfdcr)
+        DCR_ACCESS_PROLOG(__mfdcr_table)
+
+_GLOBAL(__mtdcr)
+        DCR_ACCESS_PROLOG(__mtdcr_table)
+
+__mfdcr_table:
+        mfdcr  r3,0; blr
+__mtdcr_table:
+        mtdcr  0,r4; blr
+
+dcr     = 1
+        .rept   1023
+        mfdcr   r3,dcr; blr
+        mtdcr   dcr,r4; blr
+        dcr     = dcr + 1
+        .endr