From 6b399c882d7d6b8a548f8739ef35bc11e576a47a Mon Sep 17 00:00:00 2001
From: Danny Holman <dholman@gymli.org>
Date: Sun, 26 Nov 2023 18:51:37 -0600
Subject: kernel: mem: add a simple kmalloc implementation

Add a simple implementation of kmalloc. This system only works on
x86-based processors at the time of commit.

Signed-off-by: Danny Holman <dholman@gymli.org>
---
 kernel/mem.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 kernel/mem.c

(limited to 'kernel')

diff --git a/kernel/mem.c b/kernel/mem.c
new file mode 100644
index 0000000..e2f1889
--- /dev/null
+++ b/kernel/mem.c
@@ -0,0 +1,23 @@
+#include <kernel/mem.h>
+#include <kernel/alloc.h>
+#include <kernel/paging.h>
+
+extern uint32_t _kernel_end;
+static uint32_t *heap_start = &_kernel_end;
+static uint32_t *heap_end = &_kernel_end;
+
+int _alloc_new_page(void) {
+        uint32_t paddr = pfa_alloc_frame();
+        if (paddr == 0xFFFFFFFF)
+                return -1;
+        map_page(paddr, heap_end, 0x003);
+}
+
+void* kmalloc(size_t sz) {
+        void *ret = heap_end;
+        heap_end += sz;
+        return ret;
+}
+
+void kfree(void *ptr) {
+}
-- 
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