kernel: Optimize console & logging

* Modified draw loops to use `fbdev_get_index()` less often.
* Created `cons_fast_putch()`, then used it to implement `cons_putch()`
  and `cons_putstr()`. This way, when printing an entire string, the
  lock acquire/release and cursor hide/show will only happen once,
  instead of once per character.
* Modified `syslog_write()` to use `cons_putstr()`.

Signed-off-by: Quinn Stephens <quinn@osmora.org>
Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/sys/include/dev/cons/cons.h b/sys/include/dev/cons/cons.h
index 3569c52..b27be23 100644
--- a/sys/include/dev/cons/cons.h
+++ b/sys/include/dev/cons/cons.h
@@ -65,6 +65,7 @@ struct cons_screen {
 void cons_init(void);
 void cons_expose(void);
 int cons_putch(struct cons_screen *scr, char c);
+int cons_putstr(struct cons_screen *scr, const char *s, size_t len);
 
 extern struct cons_screen g_root_scr;