Initial commit

1 files changed, 65 insertions, 0 deletions

diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..4721735
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,65 @@
+#include "aplos.h"
+
+static void welcome(void);
+static void print_memmap(struct boot_info *);
+static void print_size(uint64_t);
+
+void
+main(struct boot_info *info)
+{
+	screen_init(&info->framebuffer);
+	welcome();
+	print(u8"CPU count: %u64\n", cpu_count());
+	print_memmap(info);
+
+	halt();
+}
+
+static void
+welcome(void)
+{
+	print(u8"Starting ☺☻☺☻☺☻☺☻☺☻\n");
+}
+
+static void
+print_memmap(struct boot_info *info)
+{
+	print(u8"Usable memory: ");
+	uint64_t total = 0;
+	for(uint64_t i = 0; i < info->memmap_count; i++)
+		total += info->memmaps[i].size;
+	print_size(total);
+	print(u8"\n");
+
+	for(uint64_t i = 0; i < info->memmap_count; i++){
+		struct memmap *m = &info->memmaps[i];
+		print(u8"%p - %p (", m->start, m->start + m->size);
+		print_size(m->size);
+		print(u8")\n");
+	}
+}
+
+static void
+print_size(uint64_t size)
+{
+	uint64_t gb, mb, kb, b;
+	gb = size >> 30; size -= gb << 30;
+	mb = size >> 20; size -= mb << 20;
+	kb = size >> 10; size -= kb << 10;
+	b  = size;
+
+	int printed = 0;
+
+#define P(what, spec, force)			\
+	if(what || (force && !printed)){			\
+		if(printed)			\
+			print(u8" + ");		\
+		printed = 1;			\
+		print(u8"%u64 " spec, what);	\
+	}
+
+	P(gb, "GB", 0);
+	P(mb, "MB", 0);
+	P(kb, "KB", 0);
+	P(b, "B", 1);
+}