memblock tests: Add simulation of physical memory

Allocation functions that return virtual addresses (with an exception
of _raw variant) clear the allocated memory after reserving it. This
requires valid memory ranges in memblock.memory.

Introduce memory_block variable to store memory that can be registered
with memblock data structure. Move assert.h and size.h includes to common.h
to share them between the test files.

Signed-off-by: Karolina Drobnik <karolinadrobnik@gmail.com>
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Link: https://lore.kernel.org/r/dce115503c74a6936c44694b00014658a1bb6522.1646055639.git.karolinadrobnik@gmail.com

tools/testing/memblock/tests/common.c

@@ -5,6 +5,8 @@
 #define INIT_MEMBLOCK_REGIONS			128
 #define INIT_MEMBLOCK_RESERVED_REGIONS		INIT_MEMBLOCK_REGIONS
 
+static struct test_memory memory_block;
+
 void reset_memblock_regions(void)
 {
 	memset(memblock.memory.regions, 0,
@@ -27,3 +29,20 @@ void reset_memblock_attributes(void)
 	memblock.bottom_up	= false;
 	memblock.current_limit	= MEMBLOCK_ALLOC_ANYWHERE;
 }
+
+void setup_memblock(void)
+{
+	reset_memblock_regions();
+	memblock_add((phys_addr_t)memory_block.base, MEM_SIZE);
+}
+
+void dummy_physical_memory_init(void)
+{
+	memory_block.base = malloc(MEM_SIZE);
+	assert(memory_block.base);
+}
+
+void dummy_physical_memory_cleanup(void)
+{
+	free(memory_block.base);
+}