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/******************************************************************************
* 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)
/* returned ip value should be the one in the caller,
* not in __paravirt_getreg() */
#define paravirt_getreg(reg) \
({ \
unsigned long res; \
BUILD_BUG_ON(!__builtin_constant_p(reg)); \
if ((reg) == _IA64_REG_IP) \
res = ia64_native_getreg(_IA64_REG_IP); \
else \
res = pv_cpu_ops.getreg(reg); \
res; \
})
/******************************************************************************
* replacement of hand written assembly codes.
*/
struct pv_cpu_asm_switch {
unsigned long switch_to;
unsigned long leave_syscall;
unsigned long work_processed_syscall;
unsigned long leave_kernel;
};
void paravirt_cpu_asm_init(const struct pv_cpu_asm_switch *cpu_asm_switch);
#endif /* __ASSEMBLY__ */
#define IA64_PARAVIRT_ASM_FUNC(name) paravirt_ ## name
#else
/* fallback for native case */
#define IA64_PARAVIRT_ASM_FUNC(name) ia64_native_ ## name
#endif /* CONFIG_PARAVIRT */
/* these routines utilize privilege-sensitive or performance-sensitive
* privileged instructions so the code must be replaced with
* paravirtualized versions */
#define ia64_switch_to IA64_PARAVIRT_ASM_FUNC(switch_to)
#define ia64_leave_syscall IA64_PARAVIRT_ASM_FUNC(leave_syscall)
#define ia64_work_processed_syscall \
IA64_PARAVIRT_ASM_FUNC(work_processed_syscall)
#define ia64_leave_kernel IA64_PARAVIRT_ASM_FUNC(leave_kernel)
#endif /* _ASM_IA64_PARAVIRT_PRIVOP_H */
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