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 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) create mode 100644 include/kernel/video/framebuffer.h (limited to 'include/kernel/video/framebuffer.h') 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 -- cgit v1.2.3