test: Initial PMM GTest units. WIP.

Signed-off-by: TunaCici <[email protected]>

Kernel/Include/Memory/Physical.h

@@ -41,6 +41,14 @@ typedef struct free_area_struct {
 
 uint64_t init_allocator(const void *start, const void *end);
 
+/* Private functions - TEST ONLY */
+void __clear_page_area(uint8_t *addr, uint32_t size);
+uint64_t __block_to_idx(const list_head_t *block, const uint32_t order);
+list_head_t* __buddy(const list_head_t *block, const uint32_t order);
+void __try_to_mark(list_head_t *block, const uint32_t order);
+void __append_to_order(list_head_t *block, const uint32_t order);
+void __remove_from_order(list_head_t *block, const uint32_t order);
+
 /* Allocate a single page / 2^order number of pages */
 void* alloc_page();
 void* alloc_pages(const uint32_t order);

Tests/MemoryPhysical.cpp

@@ -1,12 +1,42 @@
+#include <_types/_uint64_t.h>
+#include <_types/_uint8_t.h>
 #include <stdint.h>
 
 #include "gtest/gtest.h"
+#include <sys/types.h>
 
 extern "C" {
         #include "Memory/PageDef.h"
+        #include "Memory/BootMem.h"
+        #include "Memory/Physical.h"
 }
 
-TEST(MemoryPhysical, TODO)
+/* TODO: Explain what's going on here */
+#define TEST_PM_PLAYGROUND_SIZE 8 * 1024 * 1024 + SIZEOF_BLOCK(MAX_ORDER - 1) - 1
+
+TEST(MemoryPhysical, __clear_page_area)
+{
+        uint8_t *playground = new uint8_t[PAGE_SIZE];
+        for (auto i = 0; i < PAGE_SIZE; i++) {
+                playground[i] = 42;
+        }
+
+        __clear_page_area(playground, PAGE_SIZE);
+
+        for (auto i = 0; i < PAGE_SIZE; i++) {
+                EXPECT_EQ(playground[i], 0);
+        }
+}
+
+TEST(MemoryPhysical, __budy)
 {
+        list_head_t *addr = 0x0;
 
+        for (auto i = 0; i < MAX_ORDER; i++) {
+                list_head_t *buddy = __buddy(addr, i);
+                EXPECT_EQ(buddy, (list_head_t*) SIZEOF_BLOCK(i));
+
+                list_head_t *buddyBuddy = __buddy(buddy, i);
+                EXPECT_EQ(buddyBuddy, addr);
+        }        
 }