/usr/include/xenomai/asm-powerpc/syscall.h is in libxenomai-dev 2.6.3-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (C) 2001,2002,2003,2004 Philippe Gerum <rpm@xenomai.org>.
*
* 64-bit PowerPC adoption
* copyright (C) 2005 Taneli Vähäkangas and Heikki Lindholm
*
* Xenomai 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.
*
* Xenomai 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 Xenomai; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
#ifndef _XENO_ASM_POWERPC_SYSCALL_H
#define _XENO_ASM_POWERPC_SYSCALL_H
#include <asm-generic/xenomai/syscall.h>
#include <asm/xenomai/tsc.h>
#define __xn_mux_code(shifted_id,op) ((op << 24)|shifted_id|(__xn_sys_mux & 0xffff))
#define __xn_mux_shifted_id(id) ((id << 16) & 0xff0000)
#ifdef __KERNEL__
#include <linux/errno.h>
#include <asm/uaccess.h>
#include <asm/ptrace.h>
/* Register mapping for accessing syscall args. */
#define __xn_reg_mux(regs) ((regs)->gpr[0])
#define __xn_reg_rval(regs) ((regs)->gpr[3])
#define __xn_reg_arg1(regs) ((regs)->gpr[3])
#define __xn_reg_arg2(regs) ((regs)->gpr[4])
#define __xn_reg_arg3(regs) ((regs)->gpr[5])
#define __xn_reg_arg4(regs) ((regs)->gpr[6])
#define __xn_reg_arg5(regs) ((regs)->gpr[7])
#define __xn_reg_mux_p(regs) ((__xn_reg_mux(regs) & 0xffff) == __xn_sys_mux)
#define __xn_mux_id(regs) ((__xn_reg_mux(regs) >> 16) & 0xff)
#define __xn_mux_op(regs) ((__xn_reg_mux(regs) >> 24) & 0xff)
#define __xn_linux_mux_p(regs, nr) (__xn_reg_mux(regs) == (nr))
/* Purposedly used inlines and not macros for the following routines
so that we don't risk spurious side-effects on the value arg. */
static inline void __xn_success_return(struct pt_regs *regs, int v)
{
__xn_reg_rval(regs) = v;
}
static inline void __xn_error_return(struct pt_regs *regs, int v)
{
/* We currently never set the SO bit for marking errors, even if
* we always test it upon syscall return. */
__xn_reg_rval(regs) = v;
}
static inline void __xn_status_return(struct pt_regs *regs, int v)
{
__xn_reg_rval(regs) = v;
}
static inline int __xn_interrupted_p(struct pt_regs *regs)
{
return __xn_reg_rval(regs) == -EINTR;
}
#else /* !__KERNEL__ */
#include <errno.h>
/*
* Some of the following macros have been adapted from Linux's
* implementation of the syscall mechanism in <asm-ppc[64]/unistd.h>:
*
* The following code defines an inline syscall mechanism used by
* Xenomai's real-time interfaces to invoke the skin module
* services in kernel space.
*/
#define LOADARGS_0(muxcode, dummy...) \
__sc_0 = (unsigned long)(muxcode)
#define LOADARGS_1(muxcode, arg1) \
LOADARGS_0(muxcode); \
__sc_3 = (unsigned long) (arg1)
#define LOADARGS_2(muxcode, arg1, arg2) \
LOADARGS_1(muxcode, arg1); \
__sc_4 = (unsigned long) (arg2)
#define LOADARGS_3(muxcode, arg1, arg2, arg3) \
LOADARGS_2(muxcode, arg1, arg2); \
__sc_5 = (unsigned long) (arg3)
#define LOADARGS_4(muxcode, arg1, arg2, arg3, arg4) \
LOADARGS_3(muxcode, arg1, arg2, arg3); \
__sc_6 = (unsigned long) (arg4)
#define LOADARGS_5(muxcode, arg1, arg2, arg3, arg4, arg5) \
LOADARGS_4(muxcode, arg1, arg2, arg3, arg4); \
__sc_7 = (unsigned long) (arg5)
#define ASM_INPUT_0 "0" (__sc_0)
#define ASM_INPUT_1 ASM_INPUT_0, "1" (__sc_3)
#define ASM_INPUT_2 ASM_INPUT_1, "2" (__sc_4)
#define ASM_INPUT_3 ASM_INPUT_2, "3" (__sc_5)
#define ASM_INPUT_4 ASM_INPUT_3, "4" (__sc_6)
#define ASM_INPUT_5 ASM_INPUT_4, "5" (__sc_7)
#define XENOMAI_DO_SYSCALL(nr, shifted_id, op, args...) \
({ \
register unsigned long __sc_0 __asm__ ("r0"); \
register unsigned long __sc_3 __asm__ ("r3"); \
register unsigned long __sc_4 __asm__ ("r4"); \
register unsigned long __sc_5 __asm__ ("r5"); \
register unsigned long __sc_6 __asm__ ("r6"); \
register unsigned long __sc_7 __asm__ ("r7"); \
\
LOADARGS_##nr(__xn_mux_code(shifted_id,op), args); \
__asm__ __volatile__ \
("sc \n\t" \
"mfcr %0 " \
: "=&r" (__sc_0), \
"=&r" (__sc_3), "=&r" (__sc_4), \
"=&r" (__sc_5), "=&r" (__sc_6), \
"=&r" (__sc_7) \
: ASM_INPUT_##nr \
: "cr0", "ctr", "memory", \
"r8", "r9", "r10","r11", "r12"); \
(int)((__sc_0 & (1 << 28)) ? -__sc_3 : __sc_3); \
})
#define XENOMAI_SYSCALL0(op) XENOMAI_DO_SYSCALL(0,0,op)
#define XENOMAI_SYSCALL1(op,a1) XENOMAI_DO_SYSCALL(1,0,op,a1)
#define XENOMAI_SYSCALL2(op,a1,a2) XENOMAI_DO_SYSCALL(2,0,op,a1,a2)
#define XENOMAI_SYSCALL3(op,a1,a2,a3) XENOMAI_DO_SYSCALL(3,0,op,a1,a2,a3)
#define XENOMAI_SYSCALL4(op,a1,a2,a3,a4) XENOMAI_DO_SYSCALL(4,0,op,a1,a2,a3,a4)
#define XENOMAI_SYSCALL5(op,a1,a2,a3,a4,a5) XENOMAI_DO_SYSCALL(5,0,op,a1,a2,a3,a4,a5)
#define XENOMAI_SYSBIND(a1,a2,a3,a4) XENOMAI_DO_SYSCALL(4,0,__xn_sys_bind,a1,a2,a3,a4)
#define XENOMAI_SKINCALL0(id,op) XENOMAI_DO_SYSCALL(0,id,op)
#define XENOMAI_SKINCALL1(id,op,a1) XENOMAI_DO_SYSCALL(1,id,op,a1)
#define XENOMAI_SKINCALL2(id,op,a1,a2) XENOMAI_DO_SYSCALL(2,id,op,a1,a2)
#define XENOMAI_SKINCALL3(id,op,a1,a2,a3) XENOMAI_DO_SYSCALL(3,id,op,a1,a2,a3)
#define XENOMAI_SKINCALL4(id,op,a1,a2,a3,a4) XENOMAI_DO_SYSCALL(4,id,op,a1,a2,a3,a4)
#define XENOMAI_SKINCALL5(id,op,a1,a2,a3,a4,a5) XENOMAI_DO_SYSCALL(5,id,op,a1,a2,a3,a4,a5)
#endif /* __KERNEL__ */
#endif /* !_XENO_ASM_POWERPC_SYSCALL_H */
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