amd64: just enough paging support to map init

2 files changed, 9 insertions, 0 deletions

diff --git a/src/kernel/mem/alloc.c b/src/kernel/mem/alloc.c
index 797b018..e0cc5f4 100644
--- a/src/kernel/mem/alloc.c
+++ b/src/kernel/mem/alloc.c
@@ -93,6 +93,12 @@ void *page_alloc(size_t pages) {
 	panic_unimplemented();
 }
 
+void *page_zalloc(size_t pages) {
+	void *p = page_alloc(pages);
+	memset(p, 0, pages * PAGE_SIZE);
+	return p;
+}
+
 // frees `pages` consecutive pages starting from *first
 void page_free(void *first_addr, size_t pages) {
 	size_t first = (uintptr_t)(first_addr - page_bitmap_start) / PAGE_SIZE;
diff --git a/src/kernel/mem/alloc.h b/src/kernel/mem/alloc.h
index a92d866..14c4361 100644
--- a/src/kernel/mem/alloc.h
+++ b/src/kernel/mem/alloc.h
@@ -9,7 +9,10 @@ void mem_init(struct kmain_info *);
 void mem_debugprint(void);
 
 // allocates `pages` consecutive pages
+// TODO deprecate
 void *page_alloc(size_t pages);
+// zeroes the allocated pages
+void *page_zalloc(size_t pages);
 
 // frees `pages` consecutive pages starting from *first
 void page_free(void *first, size_t pages);