1 /*
2 * Copyright (c) 2015, Christoph Hellwig.
3 * Copyright (c) 2015, Intel Corporation.
4 */
5 #include <linux/platform_device.h>
6 #include <linux/module.h>
7 #include <linux/ioport.h>
8
found(u64 start,u64 end,void * data)9 static int found(u64 start, u64 end, void *data)
10 {
11 return 1;
12 }
13
register_e820_pmem(void)14 static __init int register_e820_pmem(void)
15 {
16 char *pmem = "Persistent Memory (legacy)";
17 struct platform_device *pdev;
18 int rc;
19
20 rc = walk_iomem_res(pmem, IORESOURCE_MEM, 0, -1, NULL, found);
21 if (rc <= 0)
22 return 0;
23
24 /*
25 * See drivers/nvdimm/e820.c for the implementation, this is
26 * simply here to trigger the module to load on demand.
27 */
28 pdev = platform_device_alloc("e820_pmem", -1);
29 return platform_device_add(pdev);
30 }
31 device_initcall(register_e820_pmem);
32