Better serial management

Yay, I wrote my final information technology exam yesterday (abitur).
Only english and mathematics are left now - hype!! (sorry for polluting
my commit messages with useless personal news but this will affect the
future of Melvix as my free time and therefore the time that I'm working
on this project will increase massively once I'm finished with all my
exams)

1 files changed, 18 insertions, 4 deletions

diff --git a/kernel/multiboot.c b/kernel/multiboot.c
index 8fa7aa6..c99959c 100644
--- a/kernel/multiboot.c
+++ b/kernel/multiboot.c
@@ -2,20 +2,34 @@
 
 #include <assert.h>
 #include <def.h>
+#include <mem.h>
 #include <mm.h>
 #include <multiboot.h>
+#include <serial.h>
 
 PROTECTED static struct multiboot_info *info = NULL;
 
+CLEAR static void multiboot_parse_cmdline(const char *line)
+{
+	const char *start = line;
+	for (const char *p = line; p && *p; p++) {
+		if (*p == ' ')
+			start = p + 1;
+
+		if (memcmp(start, "log", 3) == 0) {
+			serial_enable();
+			start += 3;
+		}
+	}
+}
+
 CLEAR void multiboot_init(u32 magic, u32 addr)
 {
 	assert(magic == MULTIBOOT_MAGIC);
 	info = (void *)addr;
 
-	if (info->flags & MULTIBOOT_INFO_CMDLINE) {
-		// TODO: Do something useful with grub cmdline?
-		/* printf("CMDLINE: '%s'\n", info->cmdline); */
-	}
+	if (info->flags & MULTIBOOT_INFO_CMDLINE)
+		multiboot_parse_cmdline((const char *)info->cmdline);
 }
 
 CLEAR u32 multiboot_vbe(void)