487 lines
14 KiB
C
487 lines
14 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2007,2008,2009 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/dl.h>
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#include <grub/misc.h>
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#include <grub/term.h>
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#include <grub/keyboard_layouts.h>
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#include <grub/time.h>
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#include <grub/loader.h>
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#include <grub/xen.h>
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#include <xen/io/kbdif.h>
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GRUB_MOD_LICENSE ("GPLv3+");
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static short xen_keyboard_status = 0;
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static const grub_uint8_t mapping[128] =
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{
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/* 0x00 */ 0 /* Unused */, GRUB_KEYBOARD_KEY_ESCAPE,
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/* 0x02 */ GRUB_KEYBOARD_KEY_1, GRUB_KEYBOARD_KEY_2,
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/* 0x04 */ GRUB_KEYBOARD_KEY_3, GRUB_KEYBOARD_KEY_4,
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/* 0x06 */ GRUB_KEYBOARD_KEY_5, GRUB_KEYBOARD_KEY_6,
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/* 0x08 */ GRUB_KEYBOARD_KEY_7, GRUB_KEYBOARD_KEY_8,
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/* 0x0a */ GRUB_KEYBOARD_KEY_9, GRUB_KEYBOARD_KEY_0,
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/* 0x0c */ GRUB_KEYBOARD_KEY_DASH, GRUB_KEYBOARD_KEY_EQUAL,
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/* 0x0e */ GRUB_KEYBOARD_KEY_BACKSPACE, GRUB_KEYBOARD_KEY_TAB,
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/* 0x10 */ GRUB_KEYBOARD_KEY_Q, GRUB_KEYBOARD_KEY_W,
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/* 0x12 */ GRUB_KEYBOARD_KEY_E, GRUB_KEYBOARD_KEY_R,
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/* 0x14 */ GRUB_KEYBOARD_KEY_T, GRUB_KEYBOARD_KEY_Y,
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/* 0x16 */ GRUB_KEYBOARD_KEY_U, GRUB_KEYBOARD_KEY_I,
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/* 0x18 */ GRUB_KEYBOARD_KEY_O, GRUB_KEYBOARD_KEY_P,
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/* 0x1a */ GRUB_KEYBOARD_KEY_LBRACKET, GRUB_KEYBOARD_KEY_RBRACKET,
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/* 0x1c */ GRUB_KEYBOARD_KEY_ENTER, GRUB_KEYBOARD_KEY_LEFT_CTRL,
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/* 0x1e */ GRUB_KEYBOARD_KEY_A, GRUB_KEYBOARD_KEY_S,
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/* 0x20 */ GRUB_KEYBOARD_KEY_D, GRUB_KEYBOARD_KEY_F,
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/* 0x22 */ GRUB_KEYBOARD_KEY_G, GRUB_KEYBOARD_KEY_H,
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/* 0x24 */ GRUB_KEYBOARD_KEY_J, GRUB_KEYBOARD_KEY_K,
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/* 0x26 */ GRUB_KEYBOARD_KEY_L, GRUB_KEYBOARD_KEY_SEMICOLON,
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/* 0x28 */ GRUB_KEYBOARD_KEY_DQUOTE, GRUB_KEYBOARD_KEY_RQUOTE,
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/* 0x2a */ GRUB_KEYBOARD_KEY_LEFT_SHIFT, GRUB_KEYBOARD_KEY_BACKSLASH,
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/* 0x2c */ GRUB_KEYBOARD_KEY_Z, GRUB_KEYBOARD_KEY_X,
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/* 0x2e */ GRUB_KEYBOARD_KEY_C, GRUB_KEYBOARD_KEY_V,
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/* 0x30 */ GRUB_KEYBOARD_KEY_B, GRUB_KEYBOARD_KEY_N,
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/* 0x32 */ GRUB_KEYBOARD_KEY_M, GRUB_KEYBOARD_KEY_COMMA,
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/* 0x34 */ GRUB_KEYBOARD_KEY_DOT, GRUB_KEYBOARD_KEY_SLASH,
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/* 0x36 */ GRUB_KEYBOARD_KEY_RIGHT_SHIFT, GRUB_KEYBOARD_KEY_NUMMUL,
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/* 0x38 */ GRUB_KEYBOARD_KEY_LEFT_ALT, GRUB_KEYBOARD_KEY_SPACE,
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/* 0x3a */ GRUB_KEYBOARD_KEY_CAPS_LOCK, GRUB_KEYBOARD_KEY_F1,
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/* 0x3c */ GRUB_KEYBOARD_KEY_F2, GRUB_KEYBOARD_KEY_F3,
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/* 0x3e */ GRUB_KEYBOARD_KEY_F4, GRUB_KEYBOARD_KEY_F5,
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/* 0x40 */ GRUB_KEYBOARD_KEY_F6, GRUB_KEYBOARD_KEY_F7,
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/* 0x42 */ GRUB_KEYBOARD_KEY_F8, GRUB_KEYBOARD_KEY_F9,
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/* 0x44 */ GRUB_KEYBOARD_KEY_F10, GRUB_KEYBOARD_KEY_NUM_LOCK,
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/* 0x46 */ GRUB_KEYBOARD_KEY_SCROLL_LOCK, GRUB_KEYBOARD_KEY_NUM7,
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/* 0x48 */ GRUB_KEYBOARD_KEY_NUM8, GRUB_KEYBOARD_KEY_NUM9,
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/* 0x4a */ GRUB_KEYBOARD_KEY_NUMMINUS, GRUB_KEYBOARD_KEY_NUM4,
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/* 0x4c */ GRUB_KEYBOARD_KEY_NUM5, GRUB_KEYBOARD_KEY_NUM6,
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/* 0x4e */ GRUB_KEYBOARD_KEY_NUMPLUS, GRUB_KEYBOARD_KEY_NUM1,
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/* 0x50 */ GRUB_KEYBOARD_KEY_NUM2, GRUB_KEYBOARD_KEY_NUM3,
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/* 0x52 */ GRUB_KEYBOARD_KEY_NUMDOT, GRUB_KEYBOARD_KEY_NUMDOT,
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/* 0x54 */ 0, 0,
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/* 0x56 */ GRUB_KEYBOARD_KEY_102ND, GRUB_KEYBOARD_KEY_F11,
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/* 0x58 */ GRUB_KEYBOARD_KEY_F12, 0,
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/* 0x5a */ 0, 0,
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/* 0x5c */ 0, 0,
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/* 0x5e */ 0, 0,
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/* 0x60 */ 0, GRUB_KEYBOARD_KEY_RIGHT_CTRL,
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/* 0x62 */ 0, 0,
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/* 0x64 */ GRUB_KEYBOARD_KEY_RIGHT_ALT, 0,
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/* 0x66 */ GRUB_KEYBOARD_KEY_HOME, GRUB_KEYBOARD_KEY_UP,
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/* 0x68 */ GRUB_KEYBOARD_KEY_PPAGE, GRUB_KEYBOARD_KEY_LEFT,
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/* 0x6a */ GRUB_KEYBOARD_KEY_RIGHT, GRUB_KEYBOARD_KEY_END,
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/* 0x6c */ GRUB_KEYBOARD_KEY_DOWN, GRUB_KEYBOARD_KEY_NPAGE,
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/* 0x6e */ GRUB_KEYBOARD_KEY_INSERT, GRUB_KEYBOARD_KEY_DELETE,
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/* 0x70 */ 0, 0,
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/* 0x72 */ 0, GRUB_KEYBOARD_KEY_JP_RO,
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/* 0x74 */ 0, 0,
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/* 0x76 */ 0, 0,
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/* 0x78 */ 0, 0,
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/* 0x7a */ 0, 0,
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/* 0x7c */ 0, GRUB_KEYBOARD_KEY_JP_YEN,
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/* 0x7e */ GRUB_KEYBOARD_KEY_KPCOMMA
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};
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struct virtkbd
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{
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int handle;
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char *fullname;
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char *backend_dir;
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char *frontend_dir;
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struct xenkbd_page *kbdpage;
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grub_xen_grant_t grant;
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grub_xen_evtchn_t evtchn;
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};
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struct virtkbd vkbd;
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static grub_xen_mfn_t
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grub_xen_ptr2mfn (void *ptr)
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{
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grub_xen_mfn_t *mfn_list =
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(grub_xen_mfn_t *) grub_xen_start_page_addr->mfn_list;
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return mfn_list[(grub_addr_t) ptr >> GRUB_XEN_LOG_PAGE_SIZE];
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}
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static int
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fill (const char *dir, void *data __attribute__ ((unused)))
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{
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domid_t dom;
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/* "dir" is just a number, at most 19 characters. */
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char fdir[200];
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char num[20];
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grub_err_t err;
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void *buf;
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struct evtchn_alloc_unbound alloc_unbound;
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if (vkbd.kbdpage)
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return 1;
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vkbd.handle = grub_strtoul (dir, 0, 10);
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if (grub_errno)
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{
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grub_errno = 0;
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return 0;
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}
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vkbd.fullname = 0;
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vkbd.backend_dir = 0;
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grub_snprintf (fdir, sizeof (fdir), "device/vkbd/%s/backend", dir);
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vkbd.backend_dir = grub_xenstore_get_file (fdir, NULL);
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if (!vkbd.backend_dir)
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goto out_fail_1;
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grub_snprintf (fdir, sizeof (fdir), "%s/dev",
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vkbd.backend_dir);
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grub_snprintf (fdir, sizeof (fdir), "device/vkbd/%s/backend-id", dir);
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buf = grub_xenstore_get_file (fdir, NULL);
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if (!buf)
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goto out_fail_1;
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dom = grub_strtoul (buf, 0, 10);
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grub_free (buf);
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if (grub_errno)
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goto out_fail_1;
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vkbd.kbdpage =
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grub_xen_alloc_shared_page (dom, &vkbd.grant);
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if (!vkbd.kbdpage)
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goto out_fail_1;
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grub_snprintf (fdir, sizeof (fdir), "device/vkbd/%s/page-ref", dir);
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grub_snprintf (num, sizeof (num), "%llu", (unsigned long long) grub_xen_ptr2mfn (vkbd.kbdpage));
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err = grub_xenstore_write_file (fdir, num, grub_strlen (num));
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if (err)
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goto out_fail_3;
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grub_snprintf (fdir, sizeof (fdir), "device/vkbd/%s/protocol", dir);
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err = grub_xenstore_write_file (fdir, XEN_IO_PROTO_ABI_NATIVE,
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grub_strlen (XEN_IO_PROTO_ABI_NATIVE));
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if (err)
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goto out_fail_3;
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alloc_unbound.dom = DOMID_SELF;
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alloc_unbound.remote_dom = dom;
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grub_xen_event_channel_op (EVTCHNOP_alloc_unbound, &alloc_unbound);
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vkbd.evtchn = alloc_unbound.port;
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grub_snprintf (fdir, sizeof (fdir), "device/vkbd/%s/event-channel", dir);
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grub_snprintf (num, sizeof (num), "%u", vkbd.evtchn);
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err = grub_xenstore_write_file (fdir, num, grub_strlen (num));
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if (err)
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goto out_fail_3;
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struct gnttab_dump_table dt;
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dt.dom = DOMID_SELF;
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grub_xen_grant_table_op (GNTTABOP_dump_table, (void *) &dt, 1);
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grub_snprintf (fdir, sizeof (fdir), "device/vkbd/%s", dir);
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vkbd.frontend_dir = grub_strdup (fdir);
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vkbd.kbdpage->in_cons = 0;
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vkbd.kbdpage->in_prod = 0;
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vkbd.kbdpage->out_cons = 0;
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vkbd.kbdpage->out_prod = 0;
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grub_snprintf (fdir, sizeof (fdir), "device/vkbd/%s/state", dir);
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err = grub_xenstore_write_file (fdir, "3", 1);
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if (err)
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goto out_fail_3;
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while (1)
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{
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grub_snprintf (fdir, sizeof (fdir), "%s/state",
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vkbd.backend_dir);
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buf = grub_xenstore_get_file (fdir, NULL);
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if (!buf)
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goto out_fail_3;
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if (grub_strcmp (buf, "2") != 0)
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break;
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grub_free (buf);
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grub_xen_sched_op (SCHEDOP_yield, 0);
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}
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grub_dprintf ("xen", "state=%s\n", (char *) buf);
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grub_free (buf);
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return 1;
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out_fail_3:
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grub_xen_free_shared_page (vkbd.kbdpage);
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out_fail_1:
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vkbd.kbdpage = 0;
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grub_free (vkbd.backend_dir);
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grub_free (vkbd.fullname);
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grub_errno = 0;
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return 0;
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}
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static void
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vkbd_fini (void)
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{
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char fdir[200];
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char *buf;
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struct evtchn_close close_op = {.port = vkbd.evtchn };
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if (!vkbd.kbdpage)
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return;
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grub_snprintf (fdir, sizeof (fdir), "%s/state",
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vkbd.frontend_dir);
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grub_xenstore_write_file (fdir, "6", 1);
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while (1)
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{
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grub_snprintf (fdir, sizeof (fdir), "%s/state",
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vkbd.backend_dir);
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buf = grub_xenstore_get_file (fdir, NULL);
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grub_dprintf ("xen", "state=%s\n", (char *) buf);
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if (!buf || grub_strcmp (buf, "6") == 0)
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break;
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grub_free (buf);
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grub_xen_sched_op (SCHEDOP_yield, 0);
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}
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grub_free (buf);
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grub_snprintf (fdir, sizeof (fdir), "%s/page-ref",
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vkbd.frontend_dir);
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grub_xenstore_write_file (fdir, NULL, 0);
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grub_snprintf (fdir, sizeof (fdir), "%s/event-channel",
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vkbd.frontend_dir);
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grub_xenstore_write_file (fdir, NULL, 0);
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grub_xen_free_shared_page (vkbd.kbdpage);
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vkbd.kbdpage = 0;
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grub_xen_event_channel_op (EVTCHNOP_close, &close_op);
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/* Prepare for handoff. */
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grub_snprintf (fdir, sizeof (fdir), "%s/state",
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vkbd.frontend_dir);
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grub_xenstore_write_file (fdir, "1", 1);
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}
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static grub_err_t
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vkbd_init (void)
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{
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if (vkbd.kbdpage)
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vkbd_fini ();
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grub_xenstore_dir ("device/vkbd", fill, NULL);
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if (vkbd.kbdpage)
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grub_errno = 0;
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if (!vkbd.kbdpage)
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return grub_error (GRUB_ERR_IO, "couldn't init vkbd");
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return GRUB_ERR_NONE;
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}
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static int
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fetch_key (int *is_break)
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{
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grub_uint32_t prod;
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if (!vkbd.kbdpage)
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{
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*is_break = 0;
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return -1;
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}
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mb ();
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prod = vkbd.kbdpage->in_prod;
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mb ();
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for (;vkbd.kbdpage->in_cons < prod; vkbd.kbdpage->in_cons++)
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{
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grub_uint32_t keycode;
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int ret = 0;
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if (XENKBD_IN_RING_REF(vkbd.kbdpage, vkbd.kbdpage->in_cons).type != XENKBD_TYPE_KEY)
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continue;
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keycode = XENKBD_IN_RING_REF(vkbd.kbdpage, vkbd.kbdpage->in_cons).key.keycode;
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*is_break = !XENKBD_IN_RING_REF(vkbd.kbdpage, vkbd.kbdpage->in_cons).key.pressed;
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if (keycode < ARRAY_SIZE (mapping))
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ret = mapping[keycode];
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if (ret == 0)
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{
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grub_dprintf ("xenkbd", "unknown keycode = %lx\n", (unsigned long) keycode);
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continue;
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}
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vkbd.kbdpage->in_cons++;
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return ret;
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}
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*is_break = 0;
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return -1;
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}
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static int
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grub_keyboard_isr (grub_keyboard_key_t key, int is_break)
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{
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if (!is_break)
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switch (key)
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{
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case GRUB_KEYBOARD_KEY_LEFT_SHIFT:
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xen_keyboard_status |= GRUB_TERM_STATUS_LSHIFT;
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return 1;
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case GRUB_KEYBOARD_KEY_RIGHT_SHIFT:
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xen_keyboard_status |= GRUB_TERM_STATUS_RSHIFT;
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return 1;
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case GRUB_KEYBOARD_KEY_LEFT_CTRL:
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xen_keyboard_status |= GRUB_TERM_STATUS_LCTRL;
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return 1;
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case GRUB_KEYBOARD_KEY_RIGHT_CTRL:
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xen_keyboard_status |= GRUB_TERM_STATUS_RCTRL;
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return 1;
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case GRUB_KEYBOARD_KEY_RIGHT_ALT:
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xen_keyboard_status |= GRUB_TERM_STATUS_RALT;
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return 1;
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case GRUB_KEYBOARD_KEY_LEFT_ALT:
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xen_keyboard_status |= GRUB_TERM_STATUS_LALT;
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return 1;
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default:
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return 0;
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}
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else
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switch (key)
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{
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case GRUB_KEYBOARD_KEY_LEFT_SHIFT:
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xen_keyboard_status &= ~GRUB_TERM_STATUS_LSHIFT;
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return 1;
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case GRUB_KEYBOARD_KEY_RIGHT_SHIFT:
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xen_keyboard_status &= ~GRUB_TERM_STATUS_RSHIFT;
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return 1;
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case GRUB_KEYBOARD_KEY_LEFT_CTRL:
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xen_keyboard_status &= ~GRUB_TERM_STATUS_LCTRL;
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return 1;
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case GRUB_KEYBOARD_KEY_RIGHT_CTRL:
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xen_keyboard_status &= ~GRUB_TERM_STATUS_RCTRL;
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return 1;
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case GRUB_KEYBOARD_KEY_RIGHT_ALT:
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xen_keyboard_status &= ~GRUB_TERM_STATUS_RALT;
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return 1;
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case GRUB_KEYBOARD_KEY_LEFT_ALT:
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xen_keyboard_status &= ~GRUB_TERM_STATUS_LALT;
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return 1;
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default:
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return 0;
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}
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}
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/* If there is a raw key pending, return it; otherwise return -1. */
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static int
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grub_keyboard_getkey (void)
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{
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int key;
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int is_break = 0;
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key = fetch_key (&is_break);
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if (key == -1)
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return -1;
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if (grub_keyboard_isr (key, is_break))
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return -1;
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if (is_break)
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return -1;
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return key;
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}
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/* If there is a character pending, return it;
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otherwise return GRUB_TERM_NO_KEY. */
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static int
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grub_xen_keyboard_getkey (struct grub_term_input *term __attribute__ ((unused)))
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{
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int code;
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code = grub_keyboard_getkey ();
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if (code == -1)
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return GRUB_TERM_NO_KEY;
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switch (code)
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{
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case GRUB_KEYBOARD_KEY_CAPS_LOCK:
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xen_keyboard_status ^= GRUB_TERM_STATUS_CAPS;
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return GRUB_TERM_NO_KEY;
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case GRUB_KEYBOARD_KEY_NUM_LOCK:
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xen_keyboard_status ^= GRUB_TERM_STATUS_NUM;
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return GRUB_TERM_NO_KEY;
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case GRUB_KEYBOARD_KEY_SCROLL_LOCK:
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xen_keyboard_status ^= GRUB_TERM_STATUS_SCROLL;
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return GRUB_TERM_NO_KEY;
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default:
|
|
return grub_term_map_key (code, xen_keyboard_status);
|
|
}
|
|
}
|
|
|
|
static grub_err_t
|
|
grub_keyboard_controller_init (struct grub_term_input *term __attribute__ ((unused)))
|
|
{
|
|
vkbd_init ();
|
|
return GRUB_ERR_NONE;
|
|
}
|
|
|
|
static grub_err_t
|
|
grub_keyboard_controller_fini (struct grub_term_input *term __attribute__ ((unused)))
|
|
{
|
|
vkbd_fini ();
|
|
return GRUB_ERR_NONE;
|
|
}
|
|
|
|
static grub_err_t
|
|
grub_xen_fini_hw (int noreturn __attribute__ ((unused)))
|
|
{
|
|
vkbd_fini ();
|
|
return GRUB_ERR_NONE;
|
|
}
|
|
|
|
static grub_err_t
|
|
grub_xen_restore_hw (void)
|
|
{
|
|
vkbd_init ();
|
|
return GRUB_ERR_NONE;
|
|
}
|
|
|
|
|
|
static struct grub_term_input grub_xen_keyboard_term =
|
|
{
|
|
.name = "xen_keyboard",
|
|
.init = grub_keyboard_controller_init,
|
|
.fini = grub_keyboard_controller_fini,
|
|
.getkey = grub_xen_keyboard_getkey
|
|
};
|
|
|
|
void
|
|
grub_xen_keyboard_init (void)
|
|
{
|
|
grub_term_register_input ("xen_keyboard", &grub_xen_keyboard_term);
|
|
grub_loader_register_preboot_hook (grub_xen_fini_hw, grub_xen_restore_hw,
|
|
GRUB_LOADER_PREBOOT_HOOK_PRIO_CONSOLE);
|
|
}
|
|
|
|
GRUB_MOD_FINI(xen_keyboard)
|
|
{
|
|
grub_keyboard_controller_fini (NULL);
|
|
grub_term_unregister_input (&grub_xen_keyboard_term);
|
|
}
|