From ce80ee8d40b0a2b48bfbbceac9a0baee189c5e1b Mon Sep 17 00:00:00 2001
From: dzwdz
Date: Sat, 16 Jul 2022 16:49:55 +0200
Subject: amd64: just enough paging support to map init

---
 src/kernel/mem/alloc.c | 6 ++++++
 src/kernel/mem/alloc.h | 3 +++
 2 files changed, 9 insertions(+)

(limited to 'src/kernel/mem')

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);
-- 
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