projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| c8ec22a2 JY |
1 | #------------------------------------------------------------------------------\r |
| 2 | #\r | |
| 3 | # Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>\r | |
| 4 | # This program and the accompanying materials\r | |
| 5 | # are licensed and made available under the terms and conditions of the BSD License\r | |
| 6 | # which accompanies this distribution. The full text of the license may be found at\r | |
| 7 | # http://opensource.org/licenses/bsd-license.php.\r | |
| 8 | #\r | |
| 9 | # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
| 10 | # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
| 11 | #\r | |
| 12 | # Abstract:\r | |
| 13 | #\r | |
| 14 | # Switch the stack from temporary memory to permenent memory.\r | |
| 15 | #\r | |
| 16 | #------------------------------------------------------------------------------\r | |
| 17 | \r | |
| 18 | ASM_GLOBAL ASM_PFX(Pei2LoaderSwitchStack)\r | |
| 19 | ASM_GLOBAL ASM_PFX(Loader2PeiSwitchStack)\r | |
| 20 | \r | |
| 21 | #------------------------------------------------------------------------------\r | |
| 22 | # UINT32\r | |
| 23 | # EFIAPI\r | |
| 24 | # Pei2LoaderSwitchStack (\r | |
| 25 | # VOID\r | |
| 26 | # )\r | |
| 27 | #------------------------------------------------------------------------------\r | |
| 28 | ASM_GLOBAL ASM_PFX(Pei2LoaderSwitchStack)\r | |
| 29 | ASM_PFX(Pei2LoaderSwitchStack):\r | |
| 30 | jmp ASM_PFX(Loader2PeiSwitchStack)\r | |
| 31 | \r | |
| 32 | #------------------------------------------------------------------------------\r | |
| 33 | # UINT32\r | |
| 34 | # EFIAPI\r | |
| 35 | # Loader2PeiSwitchStack (\r | |
| 36 | # )\r | |
| 37 | #------------------------------------------------------------------------------\r | |
| 38 | ASM_GLOBAL ASM_PFX(Loader2PeiSwitchStack)\r | |
| 39 | ASM_PFX(Loader2PeiSwitchStack):\r | |
| 40 | #Save current contexts\r | |
| 41 | push $exit\r | |
| 42 | pushf\r | |
| 43 | pushf\r | |
| 44 | cli\r | |
| 45 | pusha\r | |
| 46 | push $0x0\r | |
| 47 | push $0x0\r | |
| 48 | sidt (%esp)\r | |
| 49 | \r | |
| 50 | # Load new stack\r | |
| 51 | push %esp\r | |
| 52 | call ASM_PFX(SwapStack)\r | |
| 53 | mov %eax,%esp\r | |
| 54 | \r | |
| 55 | # Restore previous contexts\r | |
| 56 | lidt (%esp)\r | |
| 57 | add $8,%esp\r | |
| 58 | popa\r | |
| 59 | popf\r | |
| 60 | popf\r | |
| 61 | exit:\r | |
| 62 | ret\r | |
| 63 | \r | |
| 64 | \r |