Integrate flaterm terminal

kernel/term/term.c

@@ -0,0 +1,45 @@
+#include "flanterm.h"
+#include "flanterm_backends/fb.h"
+#include "spinlock/spinlock.h"
+#include "bootinfo/bootinfo.h"
+#include "term.h"
+#include "putchar.h"
+
+Term TERM;
+
+void term_init(void) {
+  spinlock_init(&TERM.spinlock);
+  TERM.ftctx = flanterm_fb_init(
+    NULL, NULL,
+    BOOT_INFO.fb->address,
+    BOOT_INFO.fb->width,
+    BOOT_INFO.fb->height,
+    BOOT_INFO.fb->pitch,
+    BOOT_INFO.fb->red_mask_size,
+    BOOT_INFO.fb->red_mask_shift,
+    BOOT_INFO.fb->green_mask_size,
+    BOOT_INFO.fb->green_mask_shift,
+    BOOT_INFO.fb->blue_mask_size,
+    BOOT_INFO.fb->blue_mask_shift,
+    NULL,
+    NULL, NULL,
+    NULL, NULL,
+    NULL, NULL,
+    NULL, 0, 0, 1,
+    0, 0,
+    0
+  );
+}
+
+void term_write(const char *s, size_t len) {
+  spinlock_acquire(&TERM.spinlock);
+  flanterm_write(TERM.ftctx, s, len);
+  spinlock_release(&TERM.spinlock);
+}
+
+#if PUTCHAR_ == PUTCHAR_FB
+  // For printf library
+  void putchar_(char c) {
+    term_write(&c, 1);
+  }
+#endif