projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 7601b251 AC |
1 | /** @file\r |
| 2 | Switch stack function for RISC-V\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 | #include "BaseLibInternals.h"\r | |
| 10 | \r | |
| 11 | /**\r | |
| 12 | Transfers control to a function starting with a new stack.\r | |
| 13 | \r | |
| 14 | Transfers control to the function specified by EntryPoint using the\r | |
| 15 | new stack specified by NewStack and passing in the parameters specified\r | |
| 16 | by Context1 and Context2. Context1 and Context2 are optional and may\r | |
| 17 | be NULL. The function EntryPoint must never return.\r | |
| 18 | Marker will be ignored on IA-32, x64, and EBC.\r | |
| 19 | IPF CPUs expect one additional parameter of type VOID * that specifies\r | |
| 20 | the new backing store pointer.\r | |
| 21 | \r | |
| 22 | If EntryPoint is NULL, then ASSERT().\r | |
| 23 | If NewStack is NULL, then ASSERT().\r | |
| 24 | \r | |
| 25 | @param EntryPoint A pointer to function to call with the new stack.\r | |
| 26 | @param Context1 A pointer to the context to pass into the EntryPoint\r | |
| 27 | function.\r | |
| 28 | @param Context2 A pointer to the context to pass into the EntryPoint\r | |
| 29 | function.\r | |
| 30 | @param NewStack A pointer to the new stack to use for the EntryPoint\r | |
| 31 | function.\r | |
| 32 | @param Marker VA_LIST marker for the variable argument list.\r | |
| 33 | \r | |
| 34 | **/\r | |
| 35 | VOID\r | |
| 36 | EFIAPI\r | |
| 37 | InternalSwitchStack (\r | |
| 38 | IN SWITCH_STACK_ENTRY_POINT EntryPoint,\r | |
| 39 | IN VOID *Context1, OPTIONAL\r | |
| 40 | IN VOID *Context2, OPTIONAL\r | |
| 41 | IN VOID *NewStack,\r | |
| 42 | IN VA_LIST Marker\r | |
| 43 | )\r | |
| 44 | {\r | |
| 45 | BASE_LIBRARY_JUMP_BUFFER JumpBuffer;\r | |
| 46 | \r | |
| 47 | DEBUG ((DEBUG_INFO, "RISC-V InternalSwitchStack Entry:%x Context1:%x Context2:%x NewStack%x\n", \\r | |
| 48 | EntryPoint, Context1, Context2, NewStack));\r | |
| 49 | JumpBuffer.RA = (UINTN)EntryPoint;\r | |
| 50 | JumpBuffer.SP = (UINTN)NewStack - sizeof (VOID *);\r | |
| 51 | JumpBuffer.S0 = (UINT64)(UINTN)Context1;\r | |
| 52 | JumpBuffer.S1 = (UINT64)(UINTN)Context2;\r | |
| 53 | LongJump (&JumpBuffer, (UINTN)-1);\r | |
| 54 | ASSERT(FALSE);\r | |
| 55 | }\r |