diff options
Diffstat (limited to 'gpxe/src/arch/i386/firmware/pcbios/bios_console.c')
| -rw-r--r-- | gpxe/src/arch/i386/firmware/pcbios/bios_console.c | 298 |
1 files changed, 0 insertions, 298 deletions
diff --git a/gpxe/src/arch/i386/firmware/pcbios/bios_console.c b/gpxe/src/arch/i386/firmware/pcbios/bios_console.c deleted file mode 100644 index 1d18e54c..00000000 --- a/gpxe/src/arch/i386/firmware/pcbios/bios_console.c +++ /dev/null @@ -1,298 +0,0 @@ -/* - * Copyright (C) 2006 Michael Brown <mbrown@fensystems.co.uk>. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of the - * License, or any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -FILE_LICENCE ( GPL2_OR_LATER ); - -#include <assert.h> -#include <realmode.h> -#include <console.h> -#include <gpxe/ansiesc.h> - -#define ATTR_BOLD 0x08 - -#define ATTR_FCOL_MASK 0x07 -#define ATTR_FCOL_BLACK 0x00 -#define ATTR_FCOL_BLUE 0x01 -#define ATTR_FCOL_GREEN 0x02 -#define ATTR_FCOL_CYAN 0x03 -#define ATTR_FCOL_RED 0x04 -#define ATTR_FCOL_MAGENTA 0x05 -#define ATTR_FCOL_YELLOW 0x06 -#define ATTR_FCOL_WHITE 0x07 - -#define ATTR_BCOL_MASK 0x70 -#define ATTR_BCOL_BLACK 0x00 -#define ATTR_BCOL_BLUE 0x10 -#define ATTR_BCOL_GREEN 0x20 -#define ATTR_BCOL_CYAN 0x30 -#define ATTR_BCOL_RED 0x40 -#define ATTR_BCOL_MAGENTA 0x50 -#define ATTR_BCOL_YELLOW 0x60 -#define ATTR_BCOL_WHITE 0x70 - -#define ATTR_DEFAULT ATTR_FCOL_WHITE - -/** Current character attribute */ -static unsigned int bios_attr = ATTR_DEFAULT; - -/** - * Handle ANSI CUP (cursor position) - * - * @v count Parameter count - * @v params[0] Row (1 is top) - * @v params[1] Column (1 is left) - */ -static void bios_handle_cup ( unsigned int count __unused, int params[] ) { - int cx = ( params[1] - 1 ); - int cy = ( params[0] - 1 ); - - if ( cx < 0 ) - cx = 0; - if ( cy < 0 ) - cy = 0; - - __asm__ __volatile__ ( REAL_CODE ( "sti\n\t" - "int $0x10\n\t" - "cli\n\t" ) - : : "a" ( 0x0200 ), "b" ( 1 ), - "d" ( ( cy << 8 ) | cx ) ); -} - -/** - * Handle ANSI ED (erase in page) - * - * @v count Parameter count - * @v params[0] Region to erase - */ -static void bios_handle_ed ( unsigned int count __unused, - int params[] __unused ) { - /* We assume that we always clear the whole screen */ - assert ( params[0] == ANSIESC_ED_ALL ); - - __asm__ __volatile__ ( REAL_CODE ( "sti\n\t" - "int $0x10\n\t" - "cli\n\t" ) - : : "a" ( 0x0600 ), "b" ( bios_attr << 8 ), - "c" ( 0 ), "d" ( 0xffff ) ); -} - -/** - * Handle ANSI SGR (set graphics rendition) - * - * @v count Parameter count - * @v params List of graphic rendition aspects - */ -static void bios_handle_sgr ( unsigned int count, int params[] ) { - static const uint8_t bios_attr_fcols[10] = { - ATTR_FCOL_BLACK, ATTR_FCOL_RED, ATTR_FCOL_GREEN, - ATTR_FCOL_YELLOW, ATTR_FCOL_BLUE, ATTR_FCOL_MAGENTA, - ATTR_FCOL_CYAN, ATTR_FCOL_WHITE, - ATTR_FCOL_WHITE, ATTR_FCOL_WHITE /* defaults */ - }; - static const uint8_t bios_attr_bcols[10] = { - ATTR_BCOL_BLACK, ATTR_BCOL_RED, ATTR_BCOL_GREEN, - ATTR_BCOL_YELLOW, ATTR_BCOL_BLUE, ATTR_BCOL_MAGENTA, - ATTR_BCOL_CYAN, ATTR_BCOL_WHITE, - ATTR_BCOL_BLACK, ATTR_BCOL_BLACK /* defaults */ - }; - unsigned int i; - int aspect; - - for ( i = 0 ; i < count ; i++ ) { - aspect = params[i]; - if ( aspect == 0 ) { - bios_attr = ATTR_DEFAULT; - } else if ( aspect == 1 ) { - bios_attr |= ATTR_BOLD; - } else if ( aspect == 22 ) { - bios_attr &= ~ATTR_BOLD; - } else if ( ( aspect >= 30 ) && ( aspect <= 39 ) ) { - bios_attr &= ~ATTR_FCOL_MASK; - bios_attr |= bios_attr_fcols[ aspect - 30 ]; - } else if ( ( aspect >= 40 ) && ( aspect <= 49 ) ) { - bios_attr &= ~ATTR_BCOL_MASK; - bios_attr |= bios_attr_bcols[ aspect - 40 ]; - } - } -} - -/** BIOS console ANSI escape sequence handlers */ -static struct ansiesc_handler bios_ansiesc_handlers[] = { - { ANSIESC_CUP, bios_handle_cup }, - { ANSIESC_ED, bios_handle_ed }, - { ANSIESC_SGR, bios_handle_sgr }, - { 0, NULL } -}; - -/** BIOS console ANSI escape sequence context */ -static struct ansiesc_context bios_ansiesc_ctx = { - .handlers = bios_ansiesc_handlers, -}; - -/** - * Print a character to BIOS console - * - * @v character Character to be printed - */ -static void bios_putchar ( int character ) { - int discard_a, discard_b, discard_c; - - /* Intercept ANSI escape sequences */ - character = ansiesc_process ( &bios_ansiesc_ctx, character ); - if ( character < 0 ) - return; - - /* Print character with attribute */ - __asm__ __volatile__ ( REAL_CODE ( "sti\n\t" - /* Skip non-printable characters */ - "cmpb $0x20, %%al\n\t" - "jb 1f\n\t" - /* Set attribute */ - "movw $0x0001, %%cx\n\t" - "movb $0x09, %%ah\n\t" - "int $0x10\n\t" - "\n1:\n\t" - /* Print character */ - "xorw %%bx, %%bx\n\t" - "movb $0x0e, %%ah\n\t" - "int $0x10\n\t" - "cli\n\t" ) - : "=a" ( discard_a ), "=b" ( discard_b ), - "=c" ( discard_c ) - : "a" ( character ), "b" ( bios_attr ) - : "ebp" ); -} - -/** - * Pointer to current ANSI output sequence - * - * While we are in the middle of returning an ANSI sequence for a - * special key, this will point to the next character to return. When - * not in the middle of such a sequence, this will point to a NUL - * (note: not "will be NULL"). - */ -static const char *ansi_input = ""; - -/** - * Lowest BIOS scancode of interest - * - * Most of the BIOS key scancodes that we are interested in are in a - * dense range, so subtracting a constant and treating them as offsets - * into an array works efficiently. - */ -#define BIOS_KEY_MIN 0x42 - -/** Offset into list of interesting BIOS scancodes */ -#define BIOS_KEY(scancode) ( (scancode) - BIOS_KEY_MIN ) - -/** Mapping from BIOS scan codes to ANSI escape sequences */ -static const char *ansi_sequences[] = { - [ BIOS_KEY ( 0x42 ) ] = "[19~", /* F8 (required for PXE) */ - [ BIOS_KEY ( 0x47 ) ] = "[H", /* Home */ - [ BIOS_KEY ( 0x48 ) ] = "[A", /* Up arrow */ - [ BIOS_KEY ( 0x4b ) ] = "[D", /* Left arrow */ - [ BIOS_KEY ( 0x4d ) ] = "[C", /* Right arrow */ - [ BIOS_KEY ( 0x4f ) ] = "[F", /* End */ - [ BIOS_KEY ( 0x50 ) ] = "[B", /* Down arrow */ - [ BIOS_KEY ( 0x53 ) ] = "[3~", /* Delete */ -}; - -/** - * Get ANSI escape sequence corresponding to BIOS scancode - * - * @v scancode BIOS scancode - * @ret ansi_seq ANSI escape sequence, if any, otherwise NULL - */ -static const char * scancode_to_ansi_seq ( unsigned int scancode ) { - unsigned int bios_key = BIOS_KEY ( scancode ); - - if ( bios_key < ( sizeof ( ansi_sequences ) / - sizeof ( ansi_sequences[0] ) ) ) { - return ansi_sequences[bios_key]; - } - DBG ( "Unrecognised BIOS scancode %02x\n", scancode ); - return NULL; -} - -/** - * Get character from BIOS console - * - * @ret character Character read from console - */ -static int bios_getchar ( void ) { - uint16_t keypress; - unsigned int character; - const char *ansi_seq; - - /* If we are mid-sequence, pass out the next byte */ - if ( ( character = *ansi_input ) ) { - ansi_input++; - return character; - } - - /* Read character from real BIOS console */ - __asm__ __volatile__ ( REAL_CODE ( "sti\n\t" - "int $0x16\n\t" - "cli\n\t" ) - : "=a" ( keypress ) : "a" ( 0x1000 ) ); - character = ( keypress & 0xff ); - - /* If it's a normal character, just return it */ - if ( character && ( character < 0x80 ) ) - return character; - - /* Otherwise, check for a special key that we know about */ - if ( ( ansi_seq = scancode_to_ansi_seq ( keypress >> 8 ) ) ) { - /* Start of escape sequence: return ESC (0x1b) */ - ansi_input = ansi_seq; - return 0x1b; - } - - return 0; -} - -/** - * Check for character ready to read from BIOS console - * - * @ret True Character available to read - * @ret False No character available to read - */ -static int bios_iskey ( void ) { - unsigned int discard_a; - unsigned int flags; - - /* If we are mid-sequence, we are always ready */ - if ( *ansi_input ) - return 1; - - /* Otherwise check the real BIOS console */ - __asm__ __volatile__ ( REAL_CODE ( "sti\n\t" - "int $0x16\n\t" - "pushfw\n\t" - "popw %w0\n\t" - "cli\n\t" ) - : "=r" ( flags ), "=a" ( discard_a ) - : "a" ( 0x0100 ) ); - return ( ! ( flags & ZF ) ); -} - -struct console_driver bios_console __console_driver = { - .putchar = bios_putchar, - .getchar = bios_getchar, - .iskey = bios_iskey, -}; |