diff options
Diffstat (limited to 'kern/console.c')
| -rw-r--r-- | kern/console.c | 189 |
1 files changed, 0 insertions, 189 deletions
diff --git a/kern/console.c b/kern/console.c deleted file mode 100644 index 716ee50..0000000 --- a/kern/console.c +++ /dev/null @@ -1,189 +0,0 @@ -/** @file console.c - * - * @brief Console driver implementation. - * - * @author Hanjie Wu (hanjiew) - * @bug No functional bugs - */ - -#include <stdbool.h> -#include <stddef.h> -#include <stdint.h> -#include <string.h> - -#include <x86/asm.h> -#include <x86/video_defines.h> - -#include <console.h> -#include <sched.h> - -/** index of the register to start displaying cursor */ -#define CRTC_CURSOR_START 10 -/** bit to start displaying cursor */ -#define CURSOR_ENABLE_BIT 0x20 - -/** pointer to the viedo memory at B800h */ -a_char_on_screen_t (*console_mem)[CONSOLE_WIDTH] = - (a_char_on_screen_t(*)[CONSOLE_WIDTH])CONSOLE_MEM_BASE; - -/** the char used to produce blank */ -#define BLANK_CH ' ' -/** initial color of the cursor */ -#define DEFAULT_COLOR (FGND_WHITE | BGND_BLACK) - -pts_t* active_pts = NULL; -spl_t pts_lock = SPL_INIT; -queue_t* all_pts = NULL; - -void pts_init(pts_t* pts) { - pts->cur_x = pts->cur_y = 0; - pts->cur_color = DEFAULT_COLOR; - pts->cur_shown = 1; - pts->lock = MUTEX_INIT; - pts->refcount = 0; - queue_insert_head(&all_pts, &pts->pts_link); -} - -/** - * @brief Move the cursor to a position. Position is checked before calling this - * function - * @param x x - * @param y y - */ -static inline void move_cursor(pts_t* pts, int x, int y) { - pts->cur_x = x; - pts->cur_y = y; - int old_if = spl_lock(&pts_lock); - if (active_pts == pts) { - int pos = y * CONSOLE_WIDTH + x; - outb(CRTC_IDX_REG, CRTC_CURSOR_LSB_IDX); - outb(CRTC_DATA_REG, pos & 0xff); - outb(CRTC_IDX_REG, CRTC_CURSOR_MSB_IDX); - outb(CRTC_DATA_REG, pos >> 8); - } - spl_unlock(&pts_lock, old_if); -} - -/** - * @brief Scroll the console by one line and clean the last line - */ -static inline void scroll_page(pts_t* pts) { - /* move all but last line forward */ - memmove(pts->mem[0], pts->mem[1], - sizeof(a_char_on_screen_t) * CONSOLE_WIDTH * (CONSOLE_HEIGHT - 1)); - int i; - for (i = 0; i < CONSOLE_WIDTH; i++) { - pts->mem[CONSOLE_HEIGHT - 1][i] = - (a_char_on_screen_t){BLANK_CH, pts->cur_color}; - } - int old_if = spl_lock(&pts_lock); - if (active_pts == pts) { - memmove( - console_mem[0], console_mem[1], - sizeof(a_char_on_screen_t) * CONSOLE_WIDTH * (CONSOLE_HEIGHT - 1)); - int i; - for (i = 0; i < CONSOLE_WIDTH; i++) { - console_mem[CONSOLE_HEIGHT - 1][i] = - (a_char_on_screen_t){BLANK_CH, pts->cur_color}; - } - } - spl_unlock(&pts_lock, old_if); -} - -static inline void draw_char(pts_t* pts, - int row, - int col, - a_char_on_screen_t ch) { - pts->mem[row][col] = ch; - int old_if = spl_lock(&pts_lock); - if (active_pts == pts) { - console_mem[row][col] = ch; - } - spl_unlock(&pts_lock, old_if); -} - -int putbyte(char ch) { - return pts_putbyte(get_current()->pts, ch); -} - -int pts_putbyte(pts_t* pts, char ch) { - if (ch == '\n') { - if (pts->cur_y < CONSOLE_HEIGHT - 1) { - move_cursor(pts, 0, pts->cur_y + 1); - } else { - scroll_page(pts); - move_cursor(pts, 0, pts->cur_y); - } - return ch; - } - if (ch == '\r') { - move_cursor(pts, 0, pts->cur_y); - return ch; - } - if (ch == '\b') { - if (pts->cur_x > 0) { - move_cursor(pts, pts->cur_x - 1, pts->cur_y); - - } else if (pts->cur_y > 0) { - move_cursor(pts, CONSOLE_WIDTH - 1, pts->cur_y - 1); - } - a_char_on_screen_t c = {BLANK_CH, pts->cur_color}; - draw_char(pts, pts->cur_y, pts->cur_x, c); - return ch; - } - /* save the position where we should show the char */ - int prev_x = pts->cur_x, prev_y = pts->cur_y; - if (pts->cur_x < CONSOLE_WIDTH - 1) { - /* move forward */ - move_cursor(pts, pts->cur_x + 1, pts->cur_y); - } else if (pts->cur_y < CONSOLE_HEIGHT - 1) { - /* go to next line */ - move_cursor(pts, 0, pts->cur_y + 1); - } else { - /* scroll and go to beginning of the line */ - scroll_page(pts); - move_cursor(pts, 0, pts->cur_y); - prev_y -= 1; - } - a_char_on_screen_t c = {ch, pts->cur_color}; - draw_char(pts, prev_y, prev_x, c); - return ch; -} - -void pts_putbytes(pts_t* pts, const char* s, int len) { - if (s == NULL || len <= 0) { - return; - } - int i; - for (i = 0; i < len; i++) { - pts_putbyte(pts, s[i]); - } -} - -int pts_set_term_color(pts_t* pts, int color) { - if (color > 0xff || color < 0) { - return -1; - } - pts->cur_color = (char)color; - return 0; -} - -void pts_get_term_color(pts_t* pts, int* color) { - *color = pts->cur_color; -} - -int pts_set_cursor(pts_t* pts, int row, int col) { - if (row >= CONSOLE_HEIGHT || row < 0) { - return -1; - } - if (col >= CONSOLE_WIDTH || col < 0) { - return -1; - } - move_cursor(pts, col, row); - return 0; -} - -void pts_get_cursor(pts_t* pts, int* row, int* col) { - *row = pts->cur_y; - *col = pts->cur_x; -} |