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efi_console.c revision 1.2.2.2 
      1 /*	$NetBSD: efi_console.c,v 1.2.2.2 2006/04/22 11:37:39 simonb Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2000 Doug Rabson
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include <sys/cdefs.h>
     30 
     31 #include <efi.h>
     32 #include <efilib.h>
     33 #include <lib/libsa/stand.h>
     34 
     35 #include "bootstrap.h"
     36 
     37 static SIMPLE_TEXT_OUTPUT_INTERFACE	*conout;
     38 static SIMPLE_INPUT_INTERFACE		*conin;
     39 
     40 static void
     41 efi_cons_probe(struct console *cp)
     42 {
     43 	conout = ST->ConOut;
     44 	conin = ST->ConIn;
     45 	cp->c_flags |= C_PRESENTIN | C_PRESENTOUT;
     46 }
     47 
     48 static int
     49 efi_cons_init(int arg)
     50 {
     51 	conout->SetAttribute(conout, EFI_TEXT_ATTR(EFI_LIGHTGRAY, EFI_BLACK));
     52 	return 0;
     53 }
     54 
     55 void
     56 efi_cons_putchar(int c)
     57 {
     58 	CHAR16 buf[2];
     59 
     60 	if (c == '\n')
     61 		efi_cons_putchar('\r');
     62 
     63 	buf[0] = c;
     64 	buf[1] = 0;
     65 
     66 	conout->OutputString(conout, buf);
     67 }
     68 
     69 int
     70 efi_cons_getchar()
     71 {
     72 	EFI_INPUT_KEY key;
     73 	EFI_STATUS status;
     74 	UINTN junk;
     75 
     76 	/* Try to read a key stroke. We wait for one if none is pending. */
     77 	status = conin->ReadKeyStroke(conin, &key);
     78 	if (status == EFI_NOT_READY) {
     79 		BS->WaitForEvent(1, &conin->WaitForKey, &junk);
     80 		status = conin->ReadKeyStroke(conin, &key);
     81 	}
     82 	return (key.UnicodeChar);
     83 }
     84 
     85 int
     86 efi_cons_poll()
     87 {
     88 	/* This can clear the signaled state. */
     89 	return (BS->CheckEvent(conin->WaitForKey) == EFI_SUCCESS);
     90 }
     91 
     92 struct console efi_console = {
     93 	"efi",
     94 	"EFI console",
     95 	0,
     96 	efi_cons_probe,
     97 	efi_cons_init,
     98 	efi_cons_putchar,
     99 	efi_cons_getchar,
    100 	efi_cons_poll
    101 };
    102