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1bfda055 | 1 | /** @file\r |
2 | *\r | |
3 | * Copyright (c) 2011, ARM Limited. All rights reserved.\r | |
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 | |
9e2b420e | 15 | #include <Uefi.h>\r |
1bfda055 | 16 | #include <Library/IoLib.h>\r |
55a0d64b | 17 | #include <Library/ArmGicLib.h>\r |
1bfda055 | 18 | \r |
19 | /*\r | |
20 | * This function configures the all interrupts to be Non-secure.\r | |
21 | *\r | |
22 | */\r | |
23 | VOID\r | |
24 | EFIAPI\r | |
55a0d64b | 25 | ArmGicSetupNonSecure (\r |
1bfda055 | 26 | IN INTN GicDistributorBase,\r |
27 | IN INTN GicInterruptInterfaceBase\r | |
28 | )\r | |
29 | {\r | |
886f97c8 | 30 | UINTN InterruptId;\r |
31 | UINTN CachedPriorityMask;\r | |
32 | \r | |
33 | CachedPriorityMask = MmioRead32 (GicInterruptInterfaceBase + ARM_GIC_ICCPMR);\r | |
1bfda055 | 34 | \r |
9e2b420e | 35 | // Set priority Mask so that no interrupts get through to CPU\r |
886f97c8 | 36 | MmioWrite32 (GicInterruptInterfaceBase + ARM_GIC_ICCPMR, 0);\r |
1bfda055 | 37 | \r |
9e2b420e | 38 | // Check if there are any pending interrupts\r |
55a0d64b | 39 | //TODO: could be extended to take Peripheral interrupts into consideration, but at the moment only SGI's are taken into consideration.\r |
886f97c8 | 40 | while(0 != (MmioRead32 (GicDistributorBase + ARM_GIC_ICDICPR) & 0xF)) {\r |
9e2b420e | 41 | // Some of the SGI's are still pending, read Ack register and send End of Interrupt Signal\r |
886f97c8 | 42 | InterruptId = MmioRead32 (GicInterruptInterfaceBase + ARM_GIC_ICCIAR);\r |
1bfda055 | 43 | \r |
9e2b420e | 44 | // Write to End of interrupt signal\r |
886f97c8 | 45 | MmioWrite32 (GicInterruptInterfaceBase + ARM_GIC_ICCEIOR, InterruptId);\r |
9e2b420e | 46 | }\r |
1bfda055 | 47 | \r |
48 | // Ensure all GIC interrupts are Non-Secure\r | |
886f97c8 | 49 | MmioWrite32 (GicDistributorBase + ARM_GIC_ICDISR, 0xffffffff); // IRQs 0-31 are Non-Secure : Private Peripheral Interrupt[31:16] & Software Generated Interrupt[15:0]\r |
50 | MmioWrite32 (GicDistributorBase + ARM_GIC_ICDISR + 4, 0xffffffff); // IRQs 32-63 are Non-Secure : Shared Peripheral Interrupt\r | |
51 | MmioWrite32 (GicDistributorBase + ARM_GIC_ICDISR + 8, 0xffffffff); // And another 32 in case we're on the testchip : Shared Peripheral Interrupt (2)\r | |
1bfda055 | 52 | \r |
53 | // Ensure all interrupts can get through the priority mask\r | |
886f97c8 | 54 | MmioWrite32 (GicInterruptInterfaceBase + ARM_GIC_ICCPMR, CachedPriorityMask);\r |
1bfda055 | 55 | }\r |
56 | \r | |
57 | VOID\r | |
58 | EFIAPI\r | |
55a0d64b | 59 | ArmGicEnableInterruptInterface (\r |
1bfda055 | 60 | IN INTN GicInterruptInterfaceBase\r |
61 | )\r | |
62 | {\r | |
886f97c8 | 63 | // Set Priority Mask to allow interrupts\r |
64 | MmioWrite32 (GicInterruptInterfaceBase + ARM_GIC_ICCPMR, 0x000000FF);\r | |
1bfda055 | 65 | \r |
886f97c8 | 66 | // Enable CPU interface in Secure world\r |
67 | // Enable CPU inteface in Non-secure World\r | |
68 | // Signal Secure Interrupts to CPU using FIQ line *\r | |
69 | MmioWrite32 (GicInterruptInterfaceBase + ARM_GIC_ICCICR,\r | |
55a0d64b | 70 | ARM_GIC_ICCICR_ENABLE_SECURE |\r |
71 | ARM_GIC_ICCICR_ENABLE_NS |\r | |
72 | ARM_GIC_ICCICR_SIGNAL_SECURE_TO_FIQ);\r | |
1bfda055 | 73 | }\r |
74 | \r | |
75 | VOID\r | |
76 | EFIAPI\r | |
55a0d64b | 77 | ArmGicEnableDistributor (\r |
1bfda055 | 78 | IN INTN GicDistributorBase\r |
79 | )\r | |
80 | {\r | |
886f97c8 | 81 | // Turn on the GIC distributor\r |
82 | MmioWrite32 (GicDistributorBase + ARM_GIC_ICDDCR, 1);\r | |
1bfda055 | 83 | }\r |