vt.c File Reference

#include <miniOS/arch/x86_64/port.h>
#include <miniOS/arch/x86_64/spinlock.h>
#include <miniOS/drivers/console.h>
#include <miniOS/drivers/vt.h>
#include <miniOS/mm/vmm.h>

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Classes
struct	vt_attr_state_t
struct	vt_state_t

Enumerations
enum	vt_parser_state { VT_STATE_NORMAL = 0 , VT_STATE_ESC , VT_STATE_CSI }

Functions
static void	serial_init (void)
static void	serial_putchar (char c)
static uint8_t *	vt_vga_cell (uint16_t row, uint16_t col)
static void	vt_reset_parser (void)
static void	vt_reset_attr (void)
static uint8_t	vt_attr_byte (void)
static void	vt_write_cell (uint16_t row, uint16_t col, uint16_t ch, uint8_t attr)
static void	vt_clear_row_range (uint16_t row, uint16_t col_start, uint16_t col_end, uint8_t attr)
static void	vt_scroll_if_needed (void)
static void	vt_update_cursor_hw (void)
static void	vt_clamp_cursor (void)
static int	vt_csi_param (uint8_t index, int default_value)
static void	vt_erase_in_display (int mode)
static void	vt_erase_in_line (int mode)
static uint8_t	vt_map_256_to_vga (int color)
static uint8_t	vt_sgr_16_color (int code, bool background)
static void	vt_apply_sgr (void)
static void	vt_put_printable (uint16_t ch)
static uint8_t	latin1_to_cp437 (uint8_t c)
static void	vt_put_codepoint (uint32_t cp)
static void	utf8_flush_raw (void)
static void	utf8_emit_codepoint (uint32_t cp)
static void	vt_handle_normal_char (char c)
void	vt_handle_csi (char final)
void	vt_init (void)
	Clears the VGA framebuffer, resets cursor position to (0,0), sets default attribute (light gray on black), and initialises the ANSI escape parser state machine. Called once during kernel boot before any console output.
void	vt_clear (void)
	Fills all 80x25 VGA cells with space characters using the current default attribute, resets the cursor position to row 0 column 0, and updates the hardware cursor via VGA CRT registers.
void	vt_write_byte (char c)
	If inside an ANSI escape sequence, feeds to the CSI parser and applies the completed command (cursor movement, erase, SGR color). Otherwise:
void	vt_write (const char *buf, size_t len)
	Calls vt_write_byte() for each byte in [buf, buf+len). Efficient for bulk output from tty_write() or printk().
void	vt_set_cursor_visible (bool visible)
	Writes to VGA CRT registers VGA_CUR_START_REG (index 0x0A): sets VGA_CUR_DISABLE bit to hide, clears it and sets scanline range to show.
void	vt_get_winsize (uint16_t *rows, uint16_t *cols)
	Used by tty_ioctl TIOCGWINSZ to fill struct minios_winsize.ws_row/ws_col.
uint8_t	vt_current_attr (void)
	The attribute byte encodes foreground color (bits 3:0), background color (bits 6:4), and blink (bit 7) as set by the most recent SGR sequence.

Variables
static uint16_t	vt_rows = SCREEN_ROWS
static uint16_t	vt_cols = SCREEN_COLS
static spinlock_t	vt_fb_lock = SPINLOCK_INIT
static vt_state_t	vt_state
static uint8_t	vt_palette_rgb [16][3]
static int	utf8_rem
static uint32_t	utf8_cp
static uint8_t	utf8_buf [4]
static int	utf8_buf_len

Enumeration Type Documentation

vt_parser_state

enum vt_parser_state

Enumerator
VT_STATE_NORMAL
VT_STATE_ESC
VT_STATE_CSI

Function Documentation

latin1_to_cp437()

uint8_t latin1_to_cp437 ( uint8_t c )

static

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serial_init()

void serial_init ( void )

static

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serial_putchar()

void serial_putchar ( char c )

static

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utf8_emit_codepoint()

void utf8_emit_codepoint ( uint32_t cp )

static

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utf8_flush_raw()

void utf8_flush_raw ( void )

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vt_apply_sgr()

void vt_apply_sgr ( void )

static

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vt_attr_byte()

uint8_t vt_attr_byte ( void )

static

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vt_clamp_cursor()

void vt_clamp_cursor ( void )

static

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vt_clear_row_range()

void vt_clear_row_range ( uint16_t row, uint16_t col_start, uint16_t col_end, uint8_t attr )

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vt_csi_param()

int vt_csi_param ( uint8_t index, int default_value )

static

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vt_erase_in_display()

void vt_erase_in_display ( int mode )

static

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vt_erase_in_line()

void vt_erase_in_line ( int mode )

static

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vt_handle_csi()

void vt_handle_csi

(

char

final

)

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vt_handle_normal_char()

void vt_handle_normal_char ( char c )

static

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vt_map_256_to_vga()

uint8_t vt_map_256_to_vga ( int color )

static

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vt_put_codepoint()

void vt_put_codepoint ( uint32_t cp )

static

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vt_put_printable()

void vt_put_printable ( uint16_t ch )

static

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vt_reset_attr()

void vt_reset_attr ( void )

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vt_reset_parser()

void vt_reset_parser ( void )

static

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vt_scroll_if_needed()

void vt_scroll_if_needed ( void )

static

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vt_sgr_16_color()

uint8_t vt_sgr_16_color ( int code, bool background )

static

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vt_update_cursor_hw()

void vt_update_cursor_hw ( void )

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vt_vga_cell()

uint8_t * vt_vga_cell ( uint16_t row, uint16_t col )

static

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vt_write_cell()

void vt_write_cell ( uint16_t row, uint16_t col, uint16_t ch, uint8_t attr )

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Variable Documentation

utf8_buf

uint8_t utf8_buf[4]

static

utf8_buf_len

int utf8_buf_len

static

utf8_cp

uint32_t utf8_cp

static

utf8_rem

int utf8_rem

static

vt_cols

uint16_t vt_cols = SCREEN_COLS

static

vt_fb_lock

spinlock_t vt_fb_lock = SPINLOCK_INIT

static

vt_palette_rgb

uint8_t vt_palette_rgb[16][3]

static

Initial value:

                              = {
    {0x00, 0x00, 0x00}, {0x00, 0x00, 0xaa}, {0x00, 0xaa, 0x00}, {0x00, 0xaa, 0xaa},
    {0xaa, 0x00, 0x00}, {0xaa, 0x00, 0xaa}, {0xaa, 0x55, 0x00}, {0xaa, 0xaa, 0xaa},
    {0x55, 0x55, 0x55}, {0x55, 0x55, 0xff}, {0x55, 0xff, 0x55}, {0x55, 0xff, 0xff},
    {0xff, 0x55, 0x55}, {0xff, 0x55, 0xff}, {0xff, 0xff, 0x55}, {0xff, 0xff, 0xff},
}

vt_rows

uint16_t vt_rows = SCREEN_ROWS

static

vt_state

vt_state_t vt_state

static