qemu

FORK: QEMU emulator
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ipmi.c (3174B)

      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_i2c_serial_bus_device(info->base_address,
     52                                                   "^"));
     53         break;
     54     default:
     55         abort();
     56     }
     57 
     58     if (info->interrupt_number) {
     59         aml_append(crs, aml_irq_no_flags(info->interrupt_number));
     60     }
     61 
     62     return crs;
     63 }
     64 
     65 void build_ipmi_dev_aml(AcpiDevAmlIf *adev, Aml *scope)
     66 {
     67     Aml *dev;
     68     IPMIFwInfo info = {};
     69     IPMIInterface *ii = IPMI_INTERFACE(adev);
     70     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
     71     uint16_t version;
     72 
     73     iic->get_fwinfo(ii, &info);
     74     assert(info.ipmi_spec_minor_revision <= 15);
     75     version = ((info.ipmi_spec_major_revision << 8)
     76               | (info.ipmi_spec_minor_revision << 4));
     77 
     78     dev = aml_device("MI%d", info.uuid);
     79     aml_append(dev, aml_name_decl("_HID", aml_eisaid("IPI0001")));
     80     aml_append(dev, aml_name_decl("_STR", aml_string("ipmi_%s",
     81                                                      info.interface_name)));
     82     aml_append(dev, aml_name_decl("_UID", aml_int(info.uuid)));
     83     aml_append(dev, aml_name_decl("_CRS", aml_ipmi_crs(&info)));
     84     aml_append(dev, aml_name_decl("_IFT", aml_int(info.interface_type)));
     85     aml_append(dev, aml_name_decl("_SRV", aml_int(version)));
     86 
     87     aml_append(scope, dev);
     88 }