1/*
2 * Copyright (c) 2015, Christoph Hellwig.
3 */
4#include <linux/memblock.h>
5#include <linux/platform_device.h>
6#include <linux/slab.h>
7#include <asm/e820.h>
8#include <asm/page_types.h>
9#include <asm/setup.h>
10
11static __init void register_pmem_device(struct resource *res)
12{
13	struct platform_device *pdev;
14	int error;
15
16	pdev = platform_device_alloc("pmem", PLATFORM_DEVID_AUTO);
17	if (!pdev)
18		return;
19
20	error = platform_device_add_resources(pdev, res, 1);
21	if (error)
22		goto out_put_pdev;
23
24	error = platform_device_add(pdev);
25	if (error)
26		goto out_put_pdev;
27	return;
28
29out_put_pdev:
30	dev_warn(&pdev->dev, "failed to add 'pmem' (persistent memory) device!\n");
31	platform_device_put(pdev);
32}
33
34static __init int register_pmem_devices(void)
35{
36	int i;
37
38	for (i = 0; i < e820.nr_map; i++) {
39		struct e820entry *ei = &e820.map[i];
40
41		if (ei->type == E820_PRAM) {
42			struct resource res = {
43				.flags	= IORESOURCE_MEM,
44				.start	= ei->addr,
45				.end	= ei->addr + ei->size - 1,
46			};
47			register_pmem_device(&res);
48		}
49	}
50
51	return 0;
52}
53device_initcall(register_pmem_devices);
54