diff options
Diffstat (limited to 'qemu/roms/ipxe/src/arch/i386/firmware/pcbios/bios_console.c')
| -rw-r--r-- | qemu/roms/ipxe/src/arch/i386/firmware/pcbios/bios_console.c | 385 |
1 files changed, 385 insertions, 0 deletions
diff --git a/qemu/roms/ipxe/src/arch/i386/firmware/pcbios/bios_console.c b/qemu/roms/ipxe/src/arch/i386/firmware/pcbios/bios_console.c new file mode 100644 index 000000000..bd73838b5 --- /dev/null +++ b/qemu/roms/ipxe/src/arch/i386/firmware/pcbios/bios_console.c @@ -0,0 +1,385 @@ +/* + * 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., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +FILE_LICENCE ( GPL2_OR_LATER ); + +#include <assert.h> +#include <realmode.h> +#include <bios.h> +#include <ipxe/console.h> +#include <ipxe/ansiesc.h> +#include <ipxe/keymap.h> +#include <config/console.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 + +/* Set default console usage if applicable */ +#if ! ( defined ( CONSOLE_PCBIOS ) && CONSOLE_EXPLICIT ( CONSOLE_PCBIOS ) ) +#undef CONSOLE_PCBIOS +#define CONSOLE_PCBIOS ( CONSOLE_USAGE_ALL & ~CONSOLE_USAGE_LOG ) +#endif + +/** Current character attribute */ +static unsigned int bios_attr = ATTR_DEFAULT; + +/** + * Handle ANSI CUP (cursor position) + * + * @v ctx ANSI escape sequence context + * @v count Parameter count + * @v params[0] Row (1 is top) + * @v params[1] Column (1 is left) + */ +static void bios_handle_cup ( struct ansiesc_context *ctx __unused, + 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 ctx ANSI escape sequence context + * @v count Parameter count + * @v params[0] Region to erase + */ +static void bios_handle_ed ( struct ansiesc_context *ctx __unused, + 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" ( ( ( console_height - 1 ) << 8 ) | + ( console_width - 1 ) ) ); +} + +/** + * Handle ANSI SGR (set graphics rendition) + * + * @v ctx ANSI escape sequence context + * @v count Parameter count + * @v params List of graphic rendition aspects + */ +static void bios_handle_sgr ( struct ansiesc_context *ctx __unused, + 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 ]; + } + } +} + +/** + * Handle ANSI DECTCEM set (show cursor) + * + * @v ctx ANSI escape sequence context + * @v count Parameter count + * @v params List of graphic rendition aspects + */ +static void bios_handle_dectcem_set ( struct ansiesc_context *ctx __unused, + unsigned int count __unused, + int params[] __unused ) { + uint8_t height; + + /* Get character height */ + get_real ( height, BDA_SEG, BDA_CHAR_HEIGHT ); + + __asm__ __volatile__ ( REAL_CODE ( "sti\n\t" + "int $0x10\n\t" + "cli\n\t" ) + : : "a" ( 0x0100 ), + "c" ( ( ( height - 2 ) << 8 ) | + ( height - 1 ) ) ); +} + +/** + * Handle ANSI DECTCEM reset (hide cursor) + * + * @v ctx ANSI escape sequence context + * @v count Parameter count + * @v params List of graphic rendition aspects + */ +static void bios_handle_dectcem_reset ( struct ansiesc_context *ctx __unused, + unsigned int count __unused, + int params[] __unused ) { + + __asm__ __volatile__ ( REAL_CODE ( "sti\n\t" + "int $0x10\n\t" + "cli\n\t" ) + : : "a" ( 0x0100 ), "c" ( 0x2000 ) ); +} + +/** 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 }, + { ANSIESC_DECTCEM_SET, bios_handle_dectcem_set }, + { ANSIESC_DECTCEM_RESET, bios_handle_dectcem_reset }, + { 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 ( "pushl %%ebp\n\t" /* gcc bug */ + "sti\n\t" + /* Skip non-printable characters */ + "cmpb $0x20, %%al\n\t" + "jb 1f\n\t" + /* Read attribute */ + "movb %%al, %%cl\n\t" + "movb $0x08, %%ah\n\t" + "int $0x10\n\t" + "xchgb %%al, %%cl\n\t" + /* Skip if attribute matches */ + "cmpb %%ah, %%bl\n\t" + "je 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" + "popl %%ebp\n\t" /* gcc bug */ ) + : "=a" ( discard_a ), "=b" ( discard_b ), + "=c" ( discard_c ) + : "a" ( character ), "b" ( bios_attr ) ); +} + +/** + * 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 = ""; + +/** A mapping from a BIOS scan code to an ANSI escape sequence */ +#define BIOS_KEY( key, ansi ) key ansi "\0" + +/** Mapping from BIOS scan codes to ANSI escape sequences */ +static const char ansi_sequences[] = { + BIOS_KEY ( "\x53", "[3~" ) /* Delete */ + BIOS_KEY ( "\x48", "[A" ) /* Up arrow */ + BIOS_KEY ( "\x50", "[B" ) /* Down arrow */ + BIOS_KEY ( "\x4b", "[D" ) /* Left arrow */ + BIOS_KEY ( "\x4d", "[C" ) /* Right arrow */ + BIOS_KEY ( "\x47", "[H" ) /* Home */ + BIOS_KEY ( "\x4f", "[F" ) /* End */ + BIOS_KEY ( "\x49", "[5~" ) /* Page up */ + BIOS_KEY ( "\x51", "[6~" ) /* Page down */ + BIOS_KEY ( "\x3f", "[15~" ) /* F5 */ + BIOS_KEY ( "\x40", "[17~" ) /* F6 */ + BIOS_KEY ( "\x41", "[18~" ) /* F7 */ + BIOS_KEY ( "\x42", "[19~" ) /* F8 (required for PXE) */ + BIOS_KEY ( "\x43", "[20~" ) /* F9 */ + BIOS_KEY ( "\x44", "[21~" ) /* F10 */ + BIOS_KEY ( "\x85", "[23~" ) /* F11 */ + BIOS_KEY ( "\x86", "[24~" ) /* F12 */ +}; + +/** + * 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 ) { + const char *seq = ansi_sequences; + + while ( *seq ) { + if ( *(seq++) == ( ( char ) scancode ) ) + return seq; + seq += ( strlen ( seq ) + 1 ); + } + DBG ( "Unrecognised BIOS scancode %02x\n", scancode ); + return NULL; +} + +/** + * Map a key + * + * @v character Character read from console + * @ret character Mapped character + */ +static int bios_keymap ( unsigned int character ) { + struct key_mapping *mapping; + + for_each_table_entry ( mapping, KEYMAP ) { + if ( mapping->from == character ) + return mapping->to; + } + return character; +} + +/** + * 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 map and return it */ + if ( character && ( character < 0x80 ) ) + return bios_keymap ( 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" ( 0x1100 ) ); + return ( ! ( flags & ZF ) ); +} + +struct console_driver bios_console __console_driver = { + .putchar = bios_putchar, + .getchar = bios_getchar, + .iskey = bios_iskey, + .usage = CONSOLE_PCBIOS, +}; |