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/*

 * 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 KERN_ia32xen_HYPERCALL_H_

#define KERN_ia32xen_HYPERCALL_H_

#include <arch/types.h>

#include <macros.h>

typedef uint16_t domid_t;

typedef struct {

    uint8_t vector;     /**< Exception vector */

    uint8_t flags;      /**< 0-3: privilege level; 4: clear event enable */

    uint16_t cs;        /**< Code selector */

    void *address;      /**< Code offset */

} trap_info_t;

typedef struct {

    evtchn_t port;

} evtchn_send_t;

typedef struct {

    uint32_t cmd;

    union {

        evtchn_send_t send;

    };

} evtchn_op_t;

#define XEN_SET_TRAP_TABLE      0

#define XEN_MMU_UPDATE          1

#define XEN_SET_CALLBACKS       4

#define XEN_UPDATE_VA_MAPPING   14

#define XEN_EVENT_CHANNEL_OP    16

#define XEN_VERSION             17

#define XEN_CONSOLE_IO          18

#define XEN_VM_ASSIST           21

#define XEN_MMUEXT_OP           26

/*

 * Commands for XEN_CONSOLE_IO

 */

#define CONSOLE_IO_WRITE    0

#define CONSOLE_IO_READ     1

#define MMUEXT_PIN_L1_TABLE      0

#define MMUEXT_PIN_L2_TABLE      1

#define MMUEXT_PIN_L3_TABLE      2

#define MMUEXT_PIN_L4_TABLE      3

#define MMUEXT_UNPIN_TABLE       4

#define MMUEXT_NEW_BASEPTR       5

#define MMUEXT_TLB_FLUSH_LOCAL   6

#define MMUEXT_INVLPG_LOCAL      7

#define MMUEXT_TLB_FLUSH_MULTI   8

#define MMUEXT_INVLPG_MULTI      9

#define MMUEXT_TLB_FLUSH_ALL    10

#define MMUEXT_INVLPG_ALL       11

#define MMUEXT_FLUSH_CACHE      12

#define MMUEXT_SET_LDT          13

#define MMUEXT_NEW_USER_BASEPTR 15

#define EVTCHNOP_SEND           4

#define UVMF_NONE               0        /**< No flushing at all */

#define UVMF_TLB_FLUSH          1        /**< Flush entire TLB(s) */

#define UVMF_INVLPG             2        /**< Flush only one entry */

#define UVMF_FLUSHTYPE_MASK     3

#define UVMF_MULTI              0        /**< Flush subset of TLBs */

#define UVMF_LOCAL              0        /**< Flush local TLB */

#define UVMF_ALL                (1 << 2) /**< Flush all TLBs */

/*

 * Commands to XEN_VM_ASSIST

 */

#define VMASST_CMD_ENABLE               0

#define VMASST_CMD_DISABLE              1

#define VMASST_TYPE_4GB_SEGMENTS        0

#define VMASST_TYPE_4GB_SEGMENTS_NOTIFY 1

#define VMASST_TYPE_WRITABLE_PAGETABLES 2

#define DOMID_SELF (0x7FF0U)

#define DOMID_IO   (0x7FF1U)

#define force_evtchn_callback() ((void) xen_version(0, 0))

#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 unsigned int cmd, const unsigned int count, const char *str)

{

    return hypercall3(XEN_CONSOLE_IO, cmd, count, str);

}

static inline int xen_vm_assist(const unsigned int cmd, const unsigned int type)

{

    return hypercall2(XEN_VM_ASSIST, cmd, type);

}

static inline int xen_set_callbacks(const unsigned int event_selector, const void *event_address, const unsigned int failsafe_selector, void *failsafe_address)

{

    return hypercall4(XEN_SET_CALLBACKS, event_selector, event_address, failsafe_selector, failsafe_address);

}

static inline int xen_set_trap_table(const trap_info_t *table)

{

    return hypercall1(XEN_SET_TRAP_TABLE, table);

}

static inline int xen_version(const unsigned int cmd, const void *arg)

{

    return hypercall2(XEN_VERSION, cmd, arg);

}

static inline int xen_notify_remote(evtchn_t channel)

{

    evtchn_op_t op;

    op.cmd = EVTCHNOP_SEND;

    op.send.port = channel;

    return hypercall1(XEN_EVENT_CHANNEL_OP, &op);

}

#endif