126 lines
3.2 KiB
C
126 lines
3.2 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2013 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/term.h>
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#include <grub/types.h>
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#include <grub/misc.h>
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#include <grub/mm.h>
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#include <grub/time.h>
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#include <grub/terminfo.h>
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#include <grub/dl.h>
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#include <grub/i386/coreboot/lbio.h>
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#include <grub/command.h>
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#include <grub/normal.h>
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GRUB_MOD_LICENSE ("GPLv3+");
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struct grub_linuxbios_cbmemc
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{
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grub_uint32_t size;
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grub_uint32_t pointer;
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char data[0];
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};
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static struct grub_linuxbios_cbmemc *cbmemc;
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static void
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put (struct grub_term_output *term __attribute__ ((unused)), const int c)
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{
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if (!cbmemc)
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return;
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if (cbmemc->pointer < cbmemc->size)
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cbmemc->data[cbmemc->pointer] = c;
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cbmemc->pointer++;
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}
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struct grub_terminfo_output_state grub_cbmemc_terminfo_output =
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{
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.put = put,
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.size = { 80, 24 }
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};
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static struct grub_term_output grub_cbmemc_term_output =
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{
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.name = "cbmemc",
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.init = grub_terminfo_output_init,
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.fini = 0,
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.putchar = grub_terminfo_putchar,
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.getxy = grub_terminfo_getxy,
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.getwh = grub_terminfo_getwh,
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.gotoxy = grub_terminfo_gotoxy,
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.cls = grub_terminfo_cls,
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.setcolorstate = grub_terminfo_setcolorstate,
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.setcursor = grub_terminfo_setcursor,
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.flags = GRUB_TERM_CODE_TYPE_ASCII,
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.data = &grub_cbmemc_terminfo_output,
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};
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static int
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iterate_linuxbios_table (grub_linuxbios_table_item_t table_item,
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void *data __attribute__ ((unused)))
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{
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if (table_item->tag != GRUB_LINUXBIOS_MEMBER_CBMEMC)
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return 0;
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cbmemc = (struct grub_linuxbios_cbmemc *) (grub_addr_t)
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*(grub_uint64_t *) (table_item + 1);
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return 1;
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}
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static grub_err_t
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grub_cmd_cbmemc (struct grub_command *cmd __attribute__ ((unused)),
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int argc __attribute__ ((unused)),
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char *argv[] __attribute__ ((unused)))
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{
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grub_size_t len;
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char *str;
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struct grub_linuxbios_cbmemc *cbmemc_saved;
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if (!cbmemc)
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return grub_error (GRUB_ERR_IO, "no CBMEM console found");
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len = cbmemc->pointer;
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if (len > cbmemc->size)
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len = cbmemc->size;
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str = cbmemc->data;
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cbmemc_saved = cbmemc;
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cbmemc = 0;
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grub_xnputs (str, len);
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cbmemc = cbmemc_saved;
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return 0;
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}
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static grub_command_t cmd;
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GRUB_MOD_INIT (cbmemc)
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{
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grub_linuxbios_table_iterate (iterate_linuxbios_table, 0);
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if (cbmemc)
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grub_term_register_output ("cbmemc", &grub_cbmemc_term_output);
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cmd =
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grub_register_command ("cbmemc", grub_cmd_cbmemc,
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0, N_("Show CBMEM console content."));
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}
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GRUB_MOD_FINI (cbmemc)
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{
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grub_term_unregister_output (&grub_cbmemc_term_output);
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grub_unregister_command (cmd);
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}
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