From d7aaba8c85cc71f3184cddcf20b740c5157c864d Mon Sep 17 00:00:00 2001
From: Alex Auvolat <alex.auvolat@ens.fr>
Date: Sun, 7 Dec 2014 11:49:52 +0100
Subject: Refactor kmalloc & tests in kmain.

---
 kernel/l0/kmalloc.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 kernel/l0/kmalloc.c

(limited to 'kernel/l0/kmalloc.c')

diff --git a/kernel/l0/kmalloc.c b/kernel/l0/kmalloc.c
new file mode 100644
index 0000000..a4ef8fe
--- /dev/null
+++ b/kernel/l0/kmalloc.c
@@ -0,0 +1,52 @@
+#include <kmalloc.h>
+
+#include <slab_alloc.h>
+#include <mutex.h>
+
+#include <frame.h>
+#include <paging.h>
+#include <region.h>
+
+static void* page_alloc_fun_for_kmalloc(size_t bytes) {
+	void* addr = region_alloc(bytes, REGION_T_CORE_HEAP, default_allocator_pf_handler);
+	return addr;
+}
+
+static slab_type_t slab_sizes[] = {
+	{ "8B kmalloc objects", 8, 2 },
+	{ "16B kmalloc objects", 16, 2 },
+	{ "32B kmalloc objects", 32, 2 },
+	{ "64B kmalloc objects", 64, 4 },
+	{ "128B kmalloc objects", 128, 4 },
+	{ "256B kmalloc objects", 256, 4 },
+	{ "512B kmalloc objects", 512, 8 },
+	{ "1KB kmalloc objects", 1024, 8 },
+	{ "2KB kmalloc objects", 2048, 16 },
+	{ "4KB kmalloc objects", 4096, 16 },
+	{ 0, 0, 0 }
+};
+
+static mem_allocator_t *kernel_allocator = 0;
+STATIC_MUTEX(kmalloc_mutex);
+
+void kmalloc_setup() {
+	kernel_allocator =
+	  create_slab_allocator(slab_sizes, page_alloc_fun_for_kmalloc,
+										region_free_unmap_free);
+}
+
+void* kmalloc(size_t sz) {
+	void* res = 0;
+
+	mutex_lock(&kmalloc_mutex);
+	res = slab_alloc(kernel_allocator, sz);
+	mutex_unlock(&kmalloc_mutex);
+
+	return res;
+}
+
+void kfree(void* ptr) {
+	mutex_lock(&kmalloc_mutex);
+	slab_free(kernel_allocator, ptr);
+	mutex_unlock(&kmalloc_mutex);
+}
-- 
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