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Add basic ANSI escape sequence support to BIOS console

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This commit is contained in:
Michael Brown 2006-12-18 01:19:38 +00:00
parent 1cd45decc4
commit 8b3a4c9862
2 changed files with 156 additions and 3 deletions
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140
src/arch/i386/firmware/pcbios/bios_console.c
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@ -16,8 +16,131 @@
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#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
@ -26,10 +149,25 @@
*/
static void bios_putchar ( int character ) {
/* Intercept ANSI escape sequences */
character = ansiesc_process ( &bios_ansiesc_ctx, character );
if ( character < 0 )
return;
/* Set attribute for printable characters */
if ( character >= 0x20 ) {
__asm__ __volatile__ ( REAL_CODE ( "sti\n\t"
"int $0x10\n\t"
"cli\n\t" )
: : "a" ( 0x0920 ), "b" ( bios_attr ),
"c" ( 1 ) );
}
/* Print the character */
__asm__ __volatile__ ( REAL_CODE ( "sti\n\t"
"int $0x10\n\t"
"cli\n\t" )
: : "a" ( character | 0x0e00 ), "b" ( 1 )
: : "a" ( character | 0x0e00 ), "b" ( 0 )
: "ebp" );
}

19
src/include/gpxe/ansiesc.h
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@ -93,8 +93,23 @@ struct ansiesc_context {
* @{
*/
/** Character and line position */
#define ANSIESC_HVP 'f'
/** Cursor position */
#define ANSIESC_CUP 'H'
/** Erase in page */
#define ANSIESC_ED 'J'
/** Erase from cursor to end of page */
#define ANSIESC_ED_TO_END 0
/** Erase from start of page to cursor */
#define ANSIESC_ED_FROM_START 1
/** Erase whole page */
#define ANSIESC_ED_ALL 2
/** Select graphic rendition */
#define ANSIESC_SGR 'm'
/** @} */