From d5e63951bdf8c154bafee11c84816539fde77b81 Mon Sep 17 00:00:00 2001 From: Danny Holman Date: Mon, 27 May 2024 14:15:18 -0500 Subject: arch: i386: add a spinlock implementation Add two functions to control thread-local spinlocks. Signed-off-by: Danny Holman --- include/kernel/video/framebuffer.h | 23 +++++++++++++++++++++++ include/kernel/video/vga.h | 33 +++++++++++++++++++++++++++++++++ 2 files changed, 56 insertions(+) create mode 100644 include/kernel/video/framebuffer.h create mode 100644 include/kernel/video/vga.h (limited to 'include/kernel') diff --git a/include/kernel/video/framebuffer.h b/include/kernel/video/framebuffer.h new file mode 100644 index 0000000..500e71b --- /dev/null +++ b/include/kernel/video/framebuffer.h @@ -0,0 +1,23 @@ +#ifndef KERNEL_FRAMEBUFFER_H +#define KERNEL_FRAMEBUFFER_H + +#include +#include + +#define VGA_WIDTH 80 +#define VGA_HEIGHT 25 + +static uint16_t *const VGA_MEMORY = (uint16_t*)0xC03FF000; + +void fb_init(void); +void fb_setcolor(uint8_t color); +void fb_putchar(char c); +void fb_setpos(int x, int y); +void fb_offsetpos(int dx, int dy); + +static inline void fb_write(const char *data, size_t size) { + for (size_t i = 0; i < size; i++) + fb_putchar(data[i]); +} + +#endif diff --git a/include/kernel/video/vga.h b/include/kernel/video/vga.h new file mode 100644 index 0000000..b639a3c --- /dev/null +++ b/include/kernel/video/vga.h @@ -0,0 +1,33 @@ +#ifndef KERNEL_VGA_H +#define KERNEL_VGA_H + +#include + +enum vga_color { + VGA_COLOR_BLACK = 0, + VGA_COLOR_BLUE = 1, + VGA_COLOR_GREEN = 2, + VGA_COLOR_CYAN = 3, + VGA_COLOR_RED = 4, + VGA_COLOR_MAGENTA = 5, + VGA_COLOR_BROWN = 6, + VGA_COLOR_LIGHT_GREY = 7, + VGA_COLOR_DARK_GREY = 8, + VGA_COLOR_LIGHT_BLUE = 9, + VGA_COLOR_LIGHT_GREEN = 10, + VGA_COLOR_LIGHT_CYAN = 11, + VGA_COLOR_LIGHT_RED = 12, + VGA_COLOR_LIGHT_MAGENTA = 13, + VGA_COLOR_LIGHT_BROWN = 14, + VGA_COLOR_LIGHT_WHITE = 15, +}; + +static inline uint8_t vga_entry_color(enum vga_color fg, enum vga_color bg) { + return fg | bg << 4; +} + +static inline uint16_t vga_entry(unsigned char uc, uint8_t color) { + return (uint16_t)uc | (uint16_t)color << 8; +} + +#endif -- cgit v1.2.3