source: mainline/kernel/arch/xen32/include/hypercall.h@ aecf79f

/*
 * Copyright (C) 2006 Martin Decky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef __xen32_HYPERCALL_H__
#define __xen32_HYPERCALL_H__

#include <arch/types.h>
#include <macros.h>


#define XEN_CONSOLE_IO  18


/*
 * Commands for XEN_CONSOLE_IO
 */
#define CONSOLE_IO_WRITE        0
#define CONSOLE_IO_READ         1


#define hypercall0(id)  \
        ({      \
                unative_t ret;  \
                asm volatile (  \
                        "call hypercall_page + (" STRING(id) " * 32)\n" \
                        : "=a" (ret)    \
                        :       \
                        : "memory"      \
                );      \
                ret;    \
        })

#define hypercall1(id, p1)      \
        ({      \
                unative_t ret, __ign1;  \
                asm volatile (  \
                        "call hypercall_page + (" STRING(id) " * 32)\n" \
                        : "=a" (ret), \
                          "=b" (__ign1) \
                        : "1" (p1)      \
                        : "memory"      \
                );      \
                ret;    \
        })

#define hypercall2(id, p1, p2)  \
        ({      \
                unative_t ret, __ign1, __ign2;  \
                asm volatile (  \
                        "call hypercall_page + (" STRING(id) " * 32)\n" \
                        : "=a" (ret), \
                          "=b" (__ign1),        \
                          "=c" (__ign2) \
                        : "1" (p1),     \
                          "2" (p2)      \
                        : "memory"      \
                );      \
                ret;    \
        })

#define hypercall3(id, p1, p2, p3)      \
        ({      \
                unative_t ret, __ign1, __ign2, __ign3;  \
                asm volatile (  \
                        "call hypercall_page + (" STRING(id) " * 32)\n" \
                        : "=a" (ret), \
                          "=b" (__ign1),        \
                          "=c" (__ign2),        \
                          "=d" (__ign3) \
                        : "1" (p1),     \
                          "2" (p2),     \
                          "3" (p3)      \
                        : "memory"      \
                );      \
                ret;    \
        })

#define hypercall4(id, p1, p2, p3, p4)  \
        ({      \
                unative_t ret, __ign1, __ign2, __ign3, __ign4;  \
                asm volatile (  \
                        "call hypercall_page + (" STRING(id) " * 32)\n" \
                        : "=a" (ret), \
                          "=b" (__ign1),        \
                          "=c" (__ign2),        \
                          "=d" (__ign3),        \
                          "=S" (__ign4) \
                        : "1" (p1),     \
                          "2" (p2),     \
                          "3" (p3),     \
                          "4" (p4)      \
                        : "memory"      \
                );      \
                ret;    \
        })

#define hypercall5(id, p1, p2, p3, p4, p5)      \
        ({      \
                unative_t ret, __ign1, __ign2, __ign3, __ign4, __ign5;  \
                asm volatile (  \
                        "call hypercall_page + (" STRING(id) " * 32)\n" \
                        : "=a" (ret), \
                          "=b" (__ign1),        \
                          "=c" (__ign2),        \
                          "=d" (__ign3),        \
                          "=S" (__ign4),        \
                          "=D" (__ign5) \
                        : "1" (p1),     \
                          "2" (p2),     \
                          "3" (p3),     \
                          "4" (p4),     \
                          "5" (p5)      \
                        : "memory"      \
                );      \
                ret;    \
        })


static inline int xen_console_io(const int cmd, const int count, const char *str)
{
        return hypercall3(XEN_CONSOLE_IO, cmd, count, str);
}

#endif