[IA64] pvops: introduce pv_cpu_ops to paravirtualize privileged instructions.
introduce pv_cpu_ops to paravirtualize privleged instructions
which are defined by ia64 intrinsics.
make them indirect C function calls by introducing function
tables, pv_cpu_ops.
Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com>
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/include/asm-ia64/paravirt_privop.h b/include/asm-ia64/paravirt_privop.h
new file mode 100644
index 0000000..7b133ae
--- /dev/null
+++ b/include/asm-ia64/paravirt_privop.h
@@ -0,0 +1,91 @@
+/******************************************************************************
+ * include/asm-ia64/paravirt_privops.h
+ *
+ * Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp>
+ * VA Linux Systems Japan K.K.
+ *
+ * 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_IA64_PARAVIRT_PRIVOP_H
+#define _ASM_IA64_PARAVIRT_PRIVOP_H
+
+#ifdef CONFIG_PARAVIRT
+
+#ifndef __ASSEMBLY__
+
+#include <linux/types.h>
+#include <asm/kregs.h> /* for IA64_PSR_I */
+
+/******************************************************************************
+ * replacement of intrinsics operations.
+ */
+
+struct pv_cpu_ops {
+ void (*fc)(unsigned long addr);
+ unsigned long (*thash)(unsigned long addr);
+ unsigned long (*get_cpuid)(int index);
+ unsigned long (*get_pmd)(int index);
+ unsigned long (*getreg)(int reg);
+ void (*setreg)(int reg, unsigned long val);
+ void (*ptcga)(unsigned long addr, unsigned long size);
+ unsigned long (*get_rr)(unsigned long index);
+ void (*set_rr)(unsigned long index, unsigned long val);
+ void (*set_rr0_to_rr4)(unsigned long val0, unsigned long val1,
+ unsigned long val2, unsigned long val3,
+ unsigned long val4);
+ void (*ssm_i)(void);
+ void (*rsm_i)(void);
+ unsigned long (*get_psr_i)(void);
+ void (*intrin_local_irq_restore)(unsigned long flags);
+};
+
+extern struct pv_cpu_ops pv_cpu_ops;
+
+extern void ia64_native_setreg_func(int regnum, unsigned long val);
+extern unsigned long ia64_native_getreg_func(int regnum);
+
+/************************************************/
+/* Instructions paravirtualized for performance */
+/************************************************/
+
+/* mask for ia64_native_ssm/rsm() must be constant.("i" constraing).
+ * static inline function doesn't satisfy it. */
+#define paravirt_ssm(mask) \
+ do { \
+ if ((mask) == IA64_PSR_I) \
+ pv_cpu_ops.ssm_i(); \
+ else \
+ ia64_native_ssm(mask); \
+ } while (0)
+
+#define paravirt_rsm(mask) \
+ do { \
+ if ((mask) == IA64_PSR_I) \
+ pv_cpu_ops.rsm_i(); \
+ else \
+ ia64_native_rsm(mask); \
+ } while (0)
+
+#endif /* __ASSEMBLY__ */
+
+#else
+
+/* fallback for native case */
+
+#endif /* CONFIG_PARAVIRT */
+
+#endif /* _ASM_IA64_PARAVIRT_PRIVOP_H */