1 /* 2 * IPMI ACPI firmware handling 3 * 4 * Copyright (c) 2015,2016 Corey Minyard, MontaVista Software, LLC 5 * 6 * This work is licensed under the terms of the GNU GPL, version 2 or later. 7 * See the COPYING file in the top-level directory. 8 */ 9 10 #include "qemu/osdep.h" 11 #include "hw/ipmi/ipmi.h" 12 #include "hw/acpi/aml-build.h" 13 #include "hw/acpi/acpi.h" 14 #include "hw/acpi/ipmi.h" 15 16 static Aml *aml_ipmi_crs(IPMIFwInfo *info) 17 { 18 Aml *crs = aml_resource_template(); 19 20 /* 21 * The base address is fixed and cannot change. That may be different 22 * if someone does PCI, but we aren't there yet. 23 */ 24 switch (info->memspace) { 25 case IPMI_MEMSPACE_IO: 26 aml_append(crs, aml_io(AML_DECODE16, info->base_address, 27 info->base_address + info->register_length - 1, 28 info->register_spacing, info->register_length)); 29 break; 30 case IPMI_MEMSPACE_MEM32: 31 aml_append(crs, 32 aml_dword_memory(AML_POS_DECODE, 33 AML_MIN_FIXED, AML_MAX_FIXED, 34 AML_NON_CACHEABLE, AML_READ_WRITE, 35 0xffffffff, 36 info->base_address, 37 info->base_address + info->register_length - 1, 38 info->register_spacing, info->register_length)); 39 break; 40 case IPMI_MEMSPACE_MEM64: 41 aml_append(crs, 42 aml_qword_memory(AML_POS_DECODE, 43 AML_MIN_FIXED, AML_MAX_FIXED, 44 AML_NON_CACHEABLE, AML_READ_WRITE, 45 0xffffffffffffffffULL, 46 info->base_address, 47 info->base_address + info->register_length - 1, 48 info->register_spacing, info->register_length)); 49 break; 50 case IPMI_MEMSPACE_SMBUS: 51 aml_append(crs, aml_return(aml_int(info->base_address))); 52 break; 53 default: 54 abort(); 55 } 56 57 if (info->interrupt_number) { 58 aml_append(crs, aml_irq_no_flags(info->interrupt_number)); 59 } 60 61 return crs; 62 } 63 64 static Aml *aml_ipmi_device(IPMIFwInfo *info) 65 { 66 Aml *dev; 67 uint16_t version = ((info->ipmi_spec_major_revision << 8) 68 | (info->ipmi_spec_minor_revision << 4)); 69 70 assert(info->ipmi_spec_minor_revision <= 15); 71 72 dev = aml_device("MI%d", info->uuid); 73 aml_append(dev, aml_name_decl("_HID", aml_eisaid("IPI0001"))); 74 aml_append(dev, aml_name_decl("_STR", aml_string("ipmi_%s", 75 info->interface_name))); 76 aml_append(dev, aml_name_decl("_UID", aml_int(info->uuid))); 77 aml_append(dev, aml_name_decl("_CRS", aml_ipmi_crs(info))); 78 aml_append(dev, aml_name_decl("_IFT", aml_int(info->interface_type))); 79 aml_append(dev, aml_name_decl("_SRV", aml_int(version))); 80 81 return dev; 82 } 83 84 void build_acpi_ipmi_devices(Aml *scope, BusState *bus) 85 { 86 87 BusChild *kid; 88 89 QTAILQ_FOREACH(kid, &bus->children, sibling) { 90 IPMIInterface *ii; 91 IPMIInterfaceClass *iic; 92 IPMIFwInfo info; 93 Object *obj = object_dynamic_cast(OBJECT(kid->child), 94 TYPE_IPMI_INTERFACE); 95 96 if (!obj) { 97 continue; 98 } 99 100 ii = IPMI_INTERFACE(obj); 101 iic = IPMI_INTERFACE_GET_CLASS(obj); 102 memset(&info, 0, sizeof(info)); 103 iic->get_fwinfo(ii, &info); 104 aml_append(scope, aml_ipmi_device(&info)); 105 } 106 } 107