projects / mirror_edk2.git / blame
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|---|---|---|
| 86c4f437 AC |
1 | /** @file\r |
| 2 | RISC-V specific functionality for DxeLoad.\r | |
| 3 | \r | |
| 4 | Copyright (c) 2020, Hewlett Packard Enterprise Development LP. All rights reserved.<BR>\r | |
| 5 | \r | |
| 6 | SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
| 7 | \r | |
| 8 | **/\r | |
| 9 | \r | |
| 10 | #include "DxeIpl.h"\r | |
| 11 | \r | |
| 12 | /**\r | |
| 13 | Transfers control to DxeCore.\r | |
| 14 | \r | |
| 15 | This function performs a CPU architecture specific operations to execute\r | |
| 16 | the entry point of DxeCore with the parameters of HobList.\r | |
| 17 | It also installs EFI_END_OF_PEI_PPI to signal the end of PEI phase.\r | |
| 18 | \r | |
| 19 | @param DxeCoreEntryPoint The entry point of DxeCore.\r | |
| 20 | @param HobList The start of HobList passed to DxeCore.\r | |
| 21 | \r | |
| 22 | **/\r | |
| 23 | VOID\r | |
| 24 | HandOffToDxeCore (\r | |
| 1436aea4 MK |
25 | IN EFI_PHYSICAL_ADDRESS DxeCoreEntryPoint,\r |
| 26 | IN EFI_PEI_HOB_POINTERS HobList\r | |
| 86c4f437 AC |
27 | )\r |
| 28 | {\r | |
| 1436aea4 MK |
29 | VOID *BaseOfStack;\r |
| 30 | VOID *TopOfStack;\r | |
| 31 | EFI_STATUS Status;\r | |
| 32 | \r | |
| 86c4f437 AC |
33 | //\r |
| 34 | //\r | |
| 35 | // Allocate 128KB for the Stack\r | |
| 36 | //\r | |
| 37 | BaseOfStack = AllocatePages (EFI_SIZE_TO_PAGES (STACK_SIZE));\r | |
| 38 | if (BaseOfStack == NULL) {\r | |
| 1436aea4 MK |
39 | DEBUG ((DEBUG_ERROR, "%a: Can't allocate memory for stack.", __FUNCTION__));\r |
| 40 | ASSERT (FALSE);\r | |
| 86c4f437 AC |
41 | }\r |
| 42 | \r | |
| 43 | //\r | |
| 44 | // Compute the top of the stack we were allocated. Pre-allocate a UINTN\r | |
| 45 | // for safety.\r | |
| 46 | //\r | |
| 1436aea4 | 47 | TopOfStack = (VOID *)((UINTN)BaseOfStack + EFI_SIZE_TO_PAGES (STACK_SIZE) * EFI_PAGE_SIZE - CPU_STACK_ALIGNMENT);\r |
| 86c4f437 AC |
48 | TopOfStack = ALIGN_POINTER (TopOfStack, CPU_STACK_ALIGNMENT);\r |
| 49 | \r | |
| 50 | //\r | |
| 51 | // End of PEI phase signal\r | |
| 52 | //\r | |
| 53 | Status = PeiServicesInstallPpi (&gEndOfPeiSignalPpi);\r | |
| 54 | if (EFI_ERROR (Status)) {\r | |
| 1436aea4 MK |
55 | DEBUG ((DEBUG_ERROR, "%a: Fail to signal End of PEI event.", __FUNCTION__));\r |
| 56 | ASSERT (FALSE);\r | |
| 86c4f437 | 57 | }\r |
| 1436aea4 | 58 | \r |
| 86c4f437 AC |
59 | //\r |
| 60 | // Update the contents of BSP stack HOB to reflect the real stack info passed to DxeCore.\r | |
| 61 | //\r | |
| 1436aea4 | 62 | UpdateStackHob ((EFI_PHYSICAL_ADDRESS)(UINTN)BaseOfStack, STACK_SIZE);\r |
| 86c4f437 AC |
63 | \r |
| 64 | DEBUG ((DEBUG_INFO, "DXE Core new stack at %x, stack pointer at %x\n", BaseOfStack, TopOfStack));\r | |
| 65 | \r | |
| 66 | //\r | |
| 67 | // Transfer the control to the entry point of DxeCore.\r | |
| 68 | //\r | |
| 69 | SwitchStack (\r | |
| 70 | (SWITCH_STACK_ENTRY_POINT)(UINTN)DxeCoreEntryPoint,\r | |
| 71 | HobList.Raw,\r | |
| 72 | NULL,\r | |
| 73 | TopOfStack\r | |
| 74 | );\r | |
| 75 | }\r |