qemu

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
}
89