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Annotation of Gnu-Mach/xen/public/io/kbdif.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * kbdif.h -- Xen virtual keyboard/mouse
        !             3:  *
        !             4:  * Permission is hereby granted, free of charge, to any person obtaining a copy
        !             5:  * of this software and associated documentation files (the "Software"), to
        !             6:  * deal in the Software without restriction, including without limitation the
        !             7:  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
        !             8:  * sell copies of the Software, and to permit persons to whom the Software is
        !             9:  * furnished to do so, subject to the following conditions:
        !            10:  *
        !            11:  * The above copyright notice and this permission notice shall be included in
        !            12:  * all copies or substantial portions of the Software.
        !            13:  *
        !            14:  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
        !            15:  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
        !            16:  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
        !            17:  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
        !            18:  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
        !            19:  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
        !            20:  * DEALINGS IN THE SOFTWARE.
        !            21:  *
        !            22:  * Copyright (C) 2005 Anthony Liguori <[email protected]>
        !            23:  * Copyright (C) 2006 Red Hat, Inc., Markus Armbruster <[email protected]>
        !            24:  */
        !            25: 
        !            26: #ifndef __XEN_PUBLIC_IO_KBDIF_H__
        !            27: #define __XEN_PUBLIC_IO_KBDIF_H__
        !            28: 
        !            29: /* In events (backend -> frontend) */
        !            30: 
        !            31: /*
        !            32:  * Frontends should ignore unknown in events.
        !            33:  */
        !            34: 
        !            35: /* Pointer movement event */
        !            36: #define XENKBD_TYPE_MOTION  1
        !            37: /* Event type 2 currently not used */
        !            38: /* Key event (includes pointer buttons) */
        !            39: #define XENKBD_TYPE_KEY     3
        !            40: /*
        !            41:  * Pointer position event
        !            42:  * Capable backend sets feature-abs-pointer in xenstore.
        !            43:  * Frontend requests ot instead of XENKBD_TYPE_MOTION by setting
        !            44:  * request-abs-update in xenstore.
        !            45:  */
        !            46: #define XENKBD_TYPE_POS     4
        !            47: 
        !            48: struct xenkbd_motion
        !            49: {
        !            50:     uint8_t type;        /* XENKBD_TYPE_MOTION */
        !            51:     int32_t rel_x;       /* relative X motion */
        !            52:     int32_t rel_y;       /* relative Y motion */
        !            53:     int32_t rel_z;       /* relative Z motion (wheel) */
        !            54: };
        !            55: 
        !            56: struct xenkbd_key
        !            57: {
        !            58:     uint8_t type;         /* XENKBD_TYPE_KEY */
        !            59:     uint8_t pressed;      /* 1 if pressed; 0 otherwise */
        !            60:     uint32_t keycode;     /* KEY_* from linux/input.h */
        !            61: };
        !            62: 
        !            63: struct xenkbd_position
        !            64: {
        !            65:     uint8_t type;        /* XENKBD_TYPE_POS */
        !            66:     int32_t abs_x;       /* absolute X position (in FB pixels) */
        !            67:     int32_t abs_y;       /* absolute Y position (in FB pixels) */
        !            68:     int32_t rel_z;       /* relative Z motion (wheel) */
        !            69: };
        !            70: 
        !            71: #define XENKBD_IN_EVENT_SIZE 40
        !            72: 
        !            73: union xenkbd_in_event
        !            74: {
        !            75:     uint8_t type;
        !            76:     struct xenkbd_motion motion;
        !            77:     struct xenkbd_key key;
        !            78:     struct xenkbd_position pos;
        !            79:     char pad[XENKBD_IN_EVENT_SIZE];
        !            80: };
        !            81: 
        !            82: /* Out events (frontend -> backend) */
        !            83: 
        !            84: /*
        !            85:  * Out events may be sent only when requested by backend, and receipt
        !            86:  * of an unknown out event is an error.
        !            87:  * No out events currently defined.
        !            88:  */
        !            89: 
        !            90: #define XENKBD_OUT_EVENT_SIZE 40
        !            91: 
        !            92: union xenkbd_out_event
        !            93: {
        !            94:     uint8_t type;
        !            95:     char pad[XENKBD_OUT_EVENT_SIZE];
        !            96: };
        !            97: 
        !            98: /* shared page */
        !            99: 
        !           100: #define XENKBD_IN_RING_SIZE 2048
        !           101: #define XENKBD_IN_RING_LEN (XENKBD_IN_RING_SIZE / XENKBD_IN_EVENT_SIZE)
        !           102: #define XENKBD_IN_RING_OFFS 1024
        !           103: #define XENKBD_IN_RING(page) \
        !           104:     ((union xenkbd_in_event *)((char *)(page) + XENKBD_IN_RING_OFFS))
        !           105: #define XENKBD_IN_RING_REF(page, idx) \
        !           106:     (XENKBD_IN_RING((page))[(idx) % XENKBD_IN_RING_LEN])
        !           107: 
        !           108: #define XENKBD_OUT_RING_SIZE 1024
        !           109: #define XENKBD_OUT_RING_LEN (XENKBD_OUT_RING_SIZE / XENKBD_OUT_EVENT_SIZE)
        !           110: #define XENKBD_OUT_RING_OFFS (XENKBD_IN_RING_OFFS + XENKBD_IN_RING_SIZE)
        !           111: #define XENKBD_OUT_RING(page) \
        !           112:     ((union xenkbd_out_event *)((char *)(page) + XENKBD_OUT_RING_OFFS))
        !           113: #define XENKBD_OUT_RING_REF(page, idx) \
        !           114:     (XENKBD_OUT_RING((page))[(idx) % XENKBD_OUT_RING_LEN])
        !           115: 
        !           116: struct xenkbd_page
        !           117: {
        !           118:     uint32_t in_cons, in_prod;
        !           119:     uint32_t out_cons, out_prod;
        !           120: };
        !           121: 
        !           122: #endif
        !           123: 
        !           124: /*
        !           125:  * Local variables:
        !           126:  * mode: C
        !           127:  * c-set-style: "BSD"
        !           128:  * c-basic-offset: 4
        !           129:  * tab-width: 4
        !           130:  * indent-tabs-mode: nil
        !           131:  * End:
        !           132:  */

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