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69b5dc9f OM |
1 | /*++\r |
2 | \r | |
b0393756 | 3 | Copyright (c) 2013-2017, ARM Ltd. All rights reserved.<BR>\r |
69b5dc9f OM |
4 | \r |
5 | This program and the accompanying materials\r | |
6 | are licensed and made available under the terms and conditions of the BSD License\r | |
7 | which accompanies this distribution. The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
13 | --*/\r | |
14 | \r | |
15 | #include "ArmGicDxe.h"\r | |
16 | \r | |
17 | VOID\r | |
18 | EFIAPI\r | |
19 | IrqInterruptHandler (\r | |
20 | IN EFI_EXCEPTION_TYPE InterruptType,\r | |
21 | IN EFI_SYSTEM_CONTEXT SystemContext\r | |
22 | );\r | |
23 | \r | |
24 | VOID\r | |
25 | EFIAPI\r | |
26 | ExitBootServicesEvent (\r | |
27 | IN EFI_EVENT Event,\r | |
28 | IN VOID *Context\r | |
29 | );\r | |
30 | \r | |
69b5dc9f | 31 | // Making this global saves a few bytes in image size\r |
69b5dc9f OM |
32 | EFI_HANDLE gHardwareInterruptHandle = NULL;\r |
33 | \r | |
69b5dc9f | 34 | // Notifications\r |
69b5dc9f OM |
35 | EFI_EVENT EfiExitBootServicesEvent = (EFI_EVENT)NULL;\r |
36 | \r | |
37 | // Maximum Number of Interrupts\r | |
38 | UINTN mGicNumInterrupts = 0;\r | |
39 | \r | |
40 | HARDWARE_INTERRUPT_HANDLER *gRegisteredInterruptHandlers = NULL;\r | |
41 | \r | |
0458b423 OM |
42 | /**\r |
43 | Register Handler for the specified interrupt source.\r | |
44 | \r | |
45 | @param This Instance pointer for this protocol\r | |
46 | @param Source Hardware source of the interrupt\r | |
47 | @param Handler Callback for interrupt. NULL to unregister\r | |
48 | \r | |
49 | @retval EFI_SUCCESS Source was updated to support Handler.\r | |
50 | @retval EFI_DEVICE_ERROR Hardware could not be programmed.\r | |
51 | \r | |
52 | **/\r | |
53 | EFI_STATUS\r | |
54 | EFIAPI\r | |
55 | RegisterInterruptSource (\r | |
56 | IN EFI_HARDWARE_INTERRUPT_PROTOCOL *This,\r | |
57 | IN HARDWARE_INTERRUPT_SOURCE Source,\r | |
58 | IN HARDWARE_INTERRUPT_HANDLER Handler\r | |
59 | )\r | |
60 | {\r | |
599f004b | 61 | if (Source >= mGicNumInterrupts) {\r |
0458b423 OM |
62 | ASSERT(FALSE);\r |
63 | return EFI_UNSUPPORTED;\r | |
64 | }\r | |
65 | \r | |
66 | if ((Handler == NULL) && (gRegisteredInterruptHandlers[Source] == NULL)) {\r | |
67 | return EFI_INVALID_PARAMETER;\r | |
68 | }\r | |
69 | \r | |
70 | if ((Handler != NULL) && (gRegisteredInterruptHandlers[Source] != NULL)) {\r | |
71 | return EFI_ALREADY_STARTED;\r | |
72 | }\r | |
73 | \r | |
74 | gRegisteredInterruptHandlers[Source] = Handler;\r | |
75 | \r | |
76 | // If the interrupt handler is unregistered then disable the interrupt\r | |
77 | if (NULL == Handler){\r | |
78 | return This->DisableInterruptSource (This, Source);\r | |
79 | } else {\r | |
80 | return This->EnableInterruptSource (This, Source);\r | |
81 | }\r | |
82 | }\r | |
83 | \r | |
69b5dc9f OM |
84 | EFI_STATUS\r |
85 | InstallAndRegisterInterruptService (\r | |
86 | IN EFI_HARDWARE_INTERRUPT_PROTOCOL *InterruptProtocol,\r | |
87 | IN EFI_CPU_INTERRUPT_HANDLER InterruptHandler,\r | |
88 | IN EFI_EVENT_NOTIFY ExitBootServicesEvent\r | |
89 | )\r | |
90 | {\r | |
91 | EFI_STATUS Status;\r | |
92 | EFI_CPU_ARCH_PROTOCOL *Cpu;\r | |
b0393756 EL |
93 | CONST UINTN RihArraySize =\r |
94 | (sizeof(HARDWARE_INTERRUPT_HANDLER) * mGicNumInterrupts);\r | |
69b5dc9f OM |
95 | \r |
96 | // Initialize the array for the Interrupt Handlers\r | |
b0393756 | 97 | gRegisteredInterruptHandlers = AllocateZeroPool (RihArraySize);\r |
69b5dc9f OM |
98 | if (gRegisteredInterruptHandlers == NULL) {\r |
99 | return EFI_OUT_OF_RESOURCES;\r | |
100 | }\r | |
101 | \r | |
102 | Status = gBS->InstallMultipleProtocolInterfaces (\r | |
103 | &gHardwareInterruptHandle,\r | |
b0393756 EL |
104 | &gHardwareInterruptProtocolGuid,\r |
105 | InterruptProtocol,\r | |
69b5dc9f OM |
106 | NULL\r |
107 | );\r | |
108 | if (EFI_ERROR (Status)) {\r | |
109 | return Status;\r | |
110 | }\r | |
111 | \r | |
69b5dc9f | 112 | // Get the CPU protocol that this driver requires.\r |
69b5dc9f OM |
113 | Status = gBS->LocateProtocol (&gEfiCpuArchProtocolGuid, NULL, (VOID **)&Cpu);\r |
114 | if (EFI_ERROR (Status)) {\r | |
115 | return Status;\r | |
116 | }\r | |
117 | \r | |
69b5dc9f | 118 | // Unregister the default exception handler.\r |
69b5dc9f OM |
119 | Status = Cpu->RegisterInterruptHandler (Cpu, ARM_ARCH_EXCEPTION_IRQ, NULL);\r |
120 | if (EFI_ERROR (Status)) {\r | |
121 | return Status;\r | |
122 | }\r | |
123 | \r | |
69b5dc9f | 124 | // Register to receive interrupts\r |
b0393756 EL |
125 | Status = Cpu->RegisterInterruptHandler (\r |
126 | Cpu,\r | |
127 | ARM_ARCH_EXCEPTION_IRQ,\r | |
128 | InterruptHandler\r | |
129 | );\r | |
69b5dc9f OM |
130 | if (EFI_ERROR (Status)) {\r |
131 | return Status;\r | |
132 | }\r | |
133 | \r | |
134 | // Register for an ExitBootServicesEvent\r | |
b0393756 EL |
135 | Status = gBS->CreateEvent (\r |
136 | EVT_SIGNAL_EXIT_BOOT_SERVICES,\r | |
137 | TPL_NOTIFY,\r | |
138 | ExitBootServicesEvent,\r | |
139 | NULL,\r | |
140 | &EfiExitBootServicesEvent\r | |
141 | );\r | |
69b5dc9f OM |
142 | \r |
143 | return Status;\r | |
144 | }\r |