summaryrefslogtreecommitdiff
path: root/src/kernel/tty.c
diff options
context:
space:
mode:
authordzwdz2021-07-10 17:41:32 +0200
committerdzwdz2021-07-10 17:41:32 +0200
commit1bf5e324005ce7122a195af106cec656960648dc (patch)
tree7a8394a5243ad50d1e8d5574d94908461fe96cc6 /src/kernel/tty.c
parent6cbdc62b5cbe34d7355047722d6d483a4d25c7f3 (diff)
a sensible source structure
The idea is that src/kernel/ is only allowed to interface with the hardware using whatever's defined in src/arch/generic.h. I'll probably write a small script for checking this later on. This is a giant commit so I've probably fucked something up. It boots fine on Bochs and QEMU, so at least there's that.
Diffstat (limited to 'src/kernel/tty.c')
-rw-r--r--src/kernel/tty.c38
1 files changed, 0 insertions, 38 deletions
diff --git a/src/kernel/tty.c b/src/kernel/tty.c
deleted file mode 100644
index 5c4c47d..0000000
--- a/src/kernel/tty.c
+++ /dev/null
@@ -1,38 +0,0 @@
-/* will be moved to userspace later on */
-
-#include <kernel/tty.h>
-
-struct vga_cell {
- unsigned char c;
- unsigned char style;
-} __attribute__((__packed__));
-
-static const size_t vga_len = 80 * 25;
-static struct vga_cell *vga = (void*) 0xB8000;
-static size_t vga_pos = 0;
-
-static void tty_scroll() {
- for (int i = 0; i < vga_len - 80; i++) {
- vga[i] = vga[i + 80];
- }
- vga_pos -= 80;
-}
-
-void tty_putchar(char c)
-{
- if (vga_pos >= vga_len - 80) tty_scroll();
- vga[vga_pos++].c = c;
-}
-
-void tty_write(const char *buf, size_t len)
-{
- for (size_t i = 0; i < len; i++) {
- tty_putchar(buf[i]);
- }
-}
-
-void tty_clear() {
- for (size_t i = 0; i < vga_len; i++)
- vga[i].c = ' ';
- vga_pos = 0;
-}