| 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 | |
| 9 | static int found(u64 start, u64 end, void *data) |
| 10 | { |
| 11 | return 1; |
| 12 | } |
| 13 | |
| 14 | static __init int register_e820_pmem(void) |
| 15 | { |
| 16 | struct platform_device *pdev; |
| 17 | int rc; |
| 18 | |
| 19 | rc = walk_iomem_res_desc(IORES_DESC_PERSISTENT_MEMORY_LEGACY, |
| 20 | 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); |