diff options
Diffstat (limited to 'core')
| -rw-r--r-- | core/kernel.c | 24 | ||||
| -rw-r--r-- | core/term.c | 76 | ||||
| -rw-r--r-- | core/vga.c | 60 |
3 files changed, 160 insertions, 0 deletions
diff --git a/core/kernel.c b/core/kernel.c new file mode 100644 index 0000000..be9782d --- /dev/null +++ b/core/kernel.c @@ -0,0 +1,24 @@ +/* + * Copyright (C) 2017 Robin Krahl <robin.krahl@ireas.org> + * + * 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 3 of the License, or (at your option) + * 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. + */ + +#include <garmos/term.h> +#include <garmos/types.h> + +void kernel_main(uint32_t multiboot, unsigned int *magicno) +{ + term_clear(); + term_print("garmos 0.1.0\n\n"); + + while(1); +} diff --git a/core/term.c b/core/term.c new file mode 100644 index 0000000..1f43591 --- /dev/null +++ b/core/term.c @@ -0,0 +1,76 @@ +/* + * Copyright (C) 2017 Robin Krahl <robin.krahl@ireas.org> + * + * 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 3 of the License, or (at your option) + * 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. + */ + +#include <garmos/term.h> +#include <garmos/types.h> +#include <garmos/vga.h> + +struct term { + uint32_t row; + uint32_t col; +}; + +static struct term term = { + .row = 0, + .col = 0 +}; + +#ifdef ENABLE_VGA + +void term_clear(void) +{ + vga_clear(); +} + +void term_put(char c) +{ + if (term.col + 1 >= VGA_COLS || c == '\n') { + term.col = 0; + term.row++; + + if (term.row >= VGA_ROWS) { + /* TODO: scroll */ + term.row = 0; + } + } + + if (c != '\n') { + vga_print(term.row, term.col, c); + term.col++; + } +} + +uint8_t term_enabled(void) { + return 1; +} + +#else + +/* no supported output found! */ + +void term_clear(void) {} + +void term_put(char c) {} + +uint8_t term_enabled(void) { + return 0; +} + +#endif + +void term_print(char *s) +{ + for (; *s != '\0'; s++) + term_put(*s); +} diff --git a/core/vga.c b/core/vga.c new file mode 100644 index 0000000..fc1982c --- /dev/null +++ b/core/vga.c @@ -0,0 +1,60 @@ +/* + * Copyright (C) 2017 Robin Krahl <robin.krahl@ireas.org> + * + * 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 3 of the License, or (at your option) + * 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. + */ + +#include <garmos/arch.h> +#include <garmos/types.h> +#include <garmos/vga.h> + +#ifndef VGA_MEMORY +#define VGA_MEMORY 0xB8000 +#endif + +void vga_clear(void) +{ + uint32_t i; + + for (i = 0; i < VGA_ROWS * VGA_COLS; i += 2) + regset8(VGA_MEMORY + i, 0); +} + +void vga_pclear(uint8_t attr) +{ + uint32_t i; + + for (i = 0; i < VGA_ROWS * VGA_COLS; i += 2) { + regset8(VGA_MEMORY + i, 0); + regset8(VGA_MEMORY + i + 1, attr); + } +} + +void vga_print(uint32_t row, uint32_t col, uint8_t c) +{ + uint32_t i = 2 * (row * VGA_COLS + col); + + if (row >= VGA_ROWS || col >= VGA_COLS) + return; + + regset8(VGA_MEMORY + i, c); +} + +void vga_pprint(uint32_t row, uint32_t col, uint8_t attr, uint8_t c) +{ + uint32_t i = 2 * (row * VGA_COLS + col); + + if (row >= VGA_ROWS || col >= VGA_COLS) + return; + + regset8(VGA_MEMORY + i, c); + regset8(VGA_MEMORY + i + 1, attr); +} |