2 * Copyright IBM Corp. 2008, 2009
4 * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
7 #include <linux/kernel.h>
8 #include <linux/module.h>
9 #include <linux/memblock.h>
10 #include <linux/init.h>
11 #include <linux/debugfs.h>
12 #include <linux/seq_file.h>
15 #include <asm/setup.h>
17 #define CHUNK_READ_WRITE 0
18 #define CHUNK_READ_ONLY 1
20 static inline void memblock_physmem_add(phys_addr_t start, phys_addr_t size)
22 memblock_add_range(&memblock.memory, start, size, 0, 0);
23 memblock_add_range(&memblock.physmem, start, size, 0, 0);
26 void __init detect_memory_memblock(void)
28 unsigned long memsize, rnmax, rzm, addr, size;
33 memsize = rzm * rnmax;
36 max_physmem_end = memsize;
38 /* keep memblock lists close to the kernel */
39 memblock_set_bottom_up(true);
45 if (max_physmem_end && addr + size >= max_physmem_end)
47 } while (type == tprot(addr + size));
48 if (type == CHUNK_READ_WRITE || type == CHUNK_READ_ONLY) {
49 if (max_physmem_end && (addr + size > max_physmem_end))
50 size = max_physmem_end - addr;
51 memblock_physmem_add(addr, size);
54 } while (addr < max_physmem_end);
55 memblock_set_bottom_up(false);
57 max_physmem_end = memblock_end_of_DRAM();