1 /* 2 * Non-Volatile Dual In-line Memory Module Virtualization Implementation 3 * 4 * Copyright(C) 2015 Intel Corporation. 5 * 6 * Author: 7 * Xiao Guangrong <guangrong.xiao@linux.intel.com> 8 * 9 * NVDIMM specifications and some documents can be found at: 10 * NVDIMM ACPI device and NFIT are introduced in ACPI 6: 11 * http://www.uefi.org/sites/default/files/resources/ACPI_6.0.pdf 12 * NVDIMM Namespace specification: 13 * http://pmem.io/documents/NVDIMM_Namespace_Spec.pdf 14 * DSM Interface Example: 15 * http://pmem.io/documents/NVDIMM_DSM_Interface_Example.pdf 16 * Driver Writer's Guide: 17 * http://pmem.io/documents/NVDIMM_Driver_Writers_Guide.pdf 18 * 19 * This work is licensed under the terms of the GNU GPL, version 2 or later. 20 * See the COPYING file in the top-level directory. 21 */ 22 23 #ifndef QEMU_NVDIMM_H 24 #define QEMU_NVDIMM_H 25 26 #include "hw/mem/pc-dimm.h" 27 #include "hw/acpi/bios-linker-loader.h" 28 29 #define NVDIMM_DEBUG 0 30 #define nvdimm_debug(fmt, ...) \ 31 do { \ 32 if (NVDIMM_DEBUG) { \ 33 fprintf(stderr, "nvdimm: " fmt, ## __VA_ARGS__); \ 34 } \ 35 } while (0) 36 37 #define TYPE_NVDIMM "nvdimm" 38 39 #define NVDIMM_DSM_MEM_FILE "etc/acpi/nvdimm-mem" 40 41 /* 42 * 32 bits IO port starting from 0x0a18 in guest is reserved for 43 * NVDIMM ACPI emulation. 44 */ 45 #define NVDIMM_ACPI_IO_BASE 0x0a18 46 #define NVDIMM_ACPI_IO_LEN 4 47 48 struct AcpiNVDIMMState { 49 /* detect if NVDIMM support is enabled. */ 50 bool is_enabled; 51 52 /* the data of the fw_cfg file NVDIMM_DSM_MEM_FILE. */ 53 GArray *dsm_mem; 54 /* the IO region used by OSPM to transfer control to QEMU. */ 55 MemoryRegion io_mr; 56 }; 57 typedef struct AcpiNVDIMMState AcpiNVDIMMState; 58 59 void nvdimm_init_acpi_state(AcpiNVDIMMState *state, MemoryRegion *io, 60 FWCfgState *fw_cfg, Object *owner); 61 void nvdimm_build_acpi(GArray *table_offsets, GArray *table_data, 62 BIOSLinker *linker, GArray *dsm_dma_arrea); 63 #endif 64