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); 32