3 * Functions specific to Apple computers
5 * Copyright (c) 2015 Roderick W. Smith
7 * This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
27 #include "refit_call_wrapper.h"
29 CHAR16
*gCsrStatus
= NULL
;
31 // Get CSR (Apple's System Integrity Protection [SIP], or "rootless") status
33 EFI_STATUS
GetCsrStatus(UINT32
*CsrStatus
) {
36 EFI_GUID CsrGuid
= CSR_GUID
;
37 EFI_STATUS Status
= EFI_INVALID_PARAMETER
;
40 Status
= EfivarGetRaw(&CsrGuid
, L
"csr-active-config", (CHAR8
**) &ReturnValue
, &CsrLength
);
41 if (Status
== EFI_SUCCESS
) {
43 *CsrStatus
= *ReturnValue
;
45 Status
= EFI_BAD_BUFFER_SIZE
;
48 MyFreePool(ReturnValue
);
51 } // INTN GetCsrStatus()
53 // Store string describing CSR status byte in gCsrStatus variable, which appears
54 // on the Info page. If DisplayMessage is TRUE, displays the new value of
55 // gCsrStatus on the screen for three seconds.
56 VOID
RecordgCsrStatus(UINT32 CsrStatus
, BOOLEAN DisplayMessage
) {
64 if (gCsrStatus
== NULL
)
65 gCsrStatus
= AllocateZeroPool(256 * sizeof(CHAR16
));
69 SPrint(gCsrStatus
, 255, L
" System Integrity Protection is enabled (0x%02x)", CsrStatus
);
72 SPrint(gCsrStatus
, 255, L
" System Integrity Protection is disabled (0x%02x)", CsrStatus
);
75 SPrint(gCsrStatus
, 255, L
" System Integrity Protection status: 0x%02x", CsrStatus
);
78 egDisplayMessage(gCsrStatus
, &BGColor
);
81 } // VOID RecordgCsrStatus
83 // Find the current CSR status and reset it to the next one in the
84 // GlobalConfig.CsrValues list, or to the first value if the current
85 // value is not on the list.
86 // Returns the value to which the CSR is being set.
87 VOID
RotateCsrValue(VOID
) {
89 UINT32_LIST
*ListItem
;
91 EFI_GUID CsrGuid
= CSR_GUID
;
94 Status
= GetCsrStatus(&CurrentValue
);
95 if ((Status
== EFI_SUCCESS
) && GlobalConfig
.CsrValues
) {
96 ListItem
= GlobalConfig
.CsrValues
;
97 while ((ListItem
!= NULL
) && (ListItem
->Value
!= CurrentValue
))
98 ListItem
= ListItem
->Next
;
99 if (ListItem
== NULL
|| ListItem
->Next
== NULL
) {
100 TargetCsr
= GlobalConfig
.CsrValues
->Value
;
102 TargetCsr
= ListItem
->Next
->Value
;
104 Status
= EfivarSetRaw(&CsrGuid
, L
"csr-active-config", (CHAR8
*) &TargetCsr
, 4, TRUE
);
105 if (Status
== EFI_SUCCESS
)
106 RecordgCsrStatus(TargetCsr
, TRUE
);
108 } // INTN RotateCsrValue()
112 * The below definitions and SetAppleOSInfo() function are based on a GRUB patch
114 * https://lists.gnu.org/archive/html/grub-devel/2013-12/msg00442.html
117 #define EFI_APPLE_SET_OS_PROTOCOL_GUID \
118 { 0xc5c5da95, 0x7d5c, 0x45e6, \
119 { 0xb2, 0xf1, 0x3f, 0xd5, 0x2b, 0xb1, 0x00, 0x77 } \
122 typedef struct EfiAppleSetOsInterface
{
124 EFI_STATUS
EFIAPI (*SetOsVersion
) (IN CHAR8
*Version
);
125 EFI_STATUS
EFIAPI (*SetOsVendor
) (IN CHAR8
*Vendor
);
126 } EfiAppleSetOsInterface
;
128 // Function to tell the firmware that OS X is being launched. This is
129 // required to work around problems on some Macs that don't fully
130 // initialize some hardware (especially video displays) when third-party
131 // OSes are launched in EFI mode.
132 EFI_STATUS
SetAppleOSInfo() {
133 CHAR16
*AppleOSVersion
= NULL
;
134 CHAR8
*AppleOSVersion8
= NULL
;
136 EFI_GUID apple_set_os_guid
= EFI_APPLE_SET_OS_PROTOCOL_GUID
;
137 EfiAppleSetOsInterface
*SetOs
= NULL
;
139 Status
= refit_call3_wrapper(BS
->LocateProtocol
, &apple_set_os_guid
, NULL
, (VOID
**) &SetOs
);
141 // If not a Mac, ignore the call....
142 if ((Status
!= EFI_SUCCESS
) || (!SetOs
))
145 if ((SetOs
->Version
!= 0) && GlobalConfig
.SpoofOSXVersion
) {
146 AppleOSVersion
= StrDuplicate(L
"Mac OS X");
147 MergeStrings(&AppleOSVersion
, GlobalConfig
.SpoofOSXVersion
, ' ');
148 if (AppleOSVersion
) {
149 AppleOSVersion8
= AllocateZeroPool((StrLen(AppleOSVersion
) + 1) * sizeof(CHAR8
));
150 UnicodeStrToAsciiStr(AppleOSVersion
, AppleOSVersion8
);
151 if (AppleOSVersion8
) {
152 Status
= refit_call1_wrapper (SetOs
->SetOsVersion
, AppleOSVersion8
);
153 if (!EFI_ERROR(Status
))
154 Status
= EFI_SUCCESS
;
155 MyFreePool(AppleOSVersion8
);
157 Status
= EFI_OUT_OF_RESOURCES
;
158 Print(L
"Out of resources in SetAppleOSInfo!\n");
160 if ((Status
== EFI_SUCCESS
) && (SetOs
->Version
== 2))
161 Status
= refit_call1_wrapper (SetOs
->SetOsVendor
, "Apple Inc.");
162 MyFreePool(AppleOSVersion
);
163 } // if (AppleOSVersion)
165 if (Status
!= EFI_SUCCESS
)
166 Print(L
"Unable to set firmware boot type!\n");
169 } // EFI_STATUS SetAppleOSInfo()