This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / include / asm-powerpc / dcr-native.h

diff --git a/include/asm-powerpc/dcr-native.h b/include/asm-powerpc/dcr-native.h
new file mode 100644 (file)
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--- /dev/null
+++ b/include/asm-powerpc/dcr-native.h
@@ -0,0 +1,72 @@
+/*
+ * (c) Copyright 2006 Benjamin Herrenschmidt, IBM Corp.
+ *                    <benh@kernel.crashing.org>
+ *
+ *   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.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program;  if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef _ASM_POWERPC_DCR_NATIVE_H
+#define _ASM_POWERPC_DCR_NATIVE_H
+#ifdef __KERNEL__
+#ifndef __ASSEMBLY__
+
+typedef struct {} dcr_host_t;
+
+#define DCR_MAP_OK(host)       (1)
+
+#define dcr_map(dev, dcr_n, dcr_c)     {}
+#define dcr_unmap(host, dcr_n, dcr_c)  {}
+#define dcr_read(host, dcr_n)          mfdcr(dcr_n)
+#define dcr_write(host, dcr_n, value)  mtdcr(dcr_n, value)
+
+/* Device Control Registers */
+void __mtdcr(int reg, unsigned int val);
+unsigned int __mfdcr(int reg);
+#define mfdcr(rn)                                              \
+       ({unsigned int rval;                                    \
+       if (__builtin_constant_p(rn))                           \
+               asm volatile("mfdcr %0," __stringify(rn)        \
+                             : "=r" (rval));                   \
+       else                                                    \
+               rval = __mfdcr(rn);                             \
+       rval;})
+
+#define mtdcr(rn, v)                                           \
+do {                                                           \
+       if (__builtin_constant_p(rn))                           \
+               asm volatile("mtdcr " __stringify(rn) ",%0"     \
+                             : : "r" (v));                     \
+       else                                                    \
+               __mtdcr(rn, v);                                 \
+} while (0)
+
+/* R/W of indirect DCRs make use of standard naming conventions for DCRs */
+#define mfdcri(base, reg)                      \
+({                                             \
+       mtdcr(base ## _CFGADDR, base ## _ ## reg);      \
+       mfdcr(base ## _CFGDATA);                        \
+})
+
+#define mtdcri(base, reg, data)                        \
+do {                                           \
+       mtdcr(base ## _CFGADDR, base ## _ ## reg);      \
+       mtdcr(base ## _CFGDATA, data);          \
+} while (0)
+
+#endif /* __ASSEMBLY__ */
+#endif /* __KERNEL__ */
+#endif /* _ASM_POWERPC_DCR_NATIVE_H */
+
+