Minimal device system, implement terminal device and libterminal

kernel/device/terminal.c

@@ -0,0 +1,44 @@
+#include <Flanterm/src/flanterm.h>
+#include <Flanterm/src/flanterm_backends/fb.h>
+#include <device/terminal.h>
+#include <libk/std.h>
+#include <limine/requests.h>
+#include <m/status.h>
+#include <mm/liballoc.h>
+#include <sys/debug.h>
+
+struct flanterm_context* ft_ctx;
+
+void* ft_malloc (size_t n) { return malloc (n); }
+
+void ft_free (void* ptr, size_t size) {
+  (void)size;
+  free (ptr);
+}
+
+bool terminal_init (void* arg) {
+  (void)arg;
+
+  struct limine_framebuffer_response* fb_r = limine_framebuffer_request.response;
+  struct limine_framebuffer* fb = fb_r->framebuffers[0];
+
+  ft_ctx = flanterm_fb_init (&ft_malloc, &ft_free, fb->address, fb->width, fb->height, fb->pitch,
+                             fb->red_mask_size, fb->red_mask_shift, fb->green_mask_size,
+                             fb->green_mask_shift, fb->blue_mask_size, fb->blue_mask_shift, NULL,
+                             NULL, NULL, NULL, NULL, NULL, NULL, NULL, 0, 0, 1, 0, 0, 0, 0);
+
+  return true;
+}
+
+void terminal_fini (void) {}
+
+int terminal_putstr (void* a1, void* a2, void* a3, void* a4) {
+  (void)a2, (void)a3, (void)a4;
+
+  char* string = (char*)a1;
+  size_t* len = (size_t*)a2;
+
+  flanterm_write (ft_ctx, string, *len);
+
+  return ST_OK;
+}