diff options
| author | mdkinney <mdkinney@6f19259b-4bc3-4df7-8a09-765794883524> | 2006-11-22 00:41:04 +0000 |
|---|---|---|
| committer | mdkinney <mdkinney@6f19259b-4bc3-4df7-8a09-765794883524> | 2006-11-22 00:41:04 +0000 |
| commit | 9e95f418ccb435a9b11fef1c994dc90d7d08e712 (patch) | |
| tree | 22fe1f98b942864e19d2ad318d6e640860dc9f6f /MdePkg/Library/PeiServicesTablePointerLibKr1/PeiServicesTablePointer.c | |
| parent | 9cbd688b1ea9269bca0be76dce4c793075bbeab8 (diff) | |
| download | edk2-platforms-9e95f418ccb435a9b11fef1c994dc90d7d08e712.tar.xz | |
Add PeiServiceTablePointerLib that uses KR1 to save/restore the PEI Services Table Pointer
This library is only valid for Ipf
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@1993 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'MdePkg/Library/PeiServicesTablePointerLibKr1/PeiServicesTablePointer.c')
| -rw-r--r-- | MdePkg/Library/PeiServicesTablePointerLibKr1/PeiServicesTablePointer.c | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/MdePkg/Library/PeiServicesTablePointerLibKr1/PeiServicesTablePointer.c b/MdePkg/Library/PeiServicesTablePointerLibKr1/PeiServicesTablePointer.c new file mode 100644 index 0000000000..474748d332 --- /dev/null +++ b/MdePkg/Library/PeiServicesTablePointerLibKr1/PeiServicesTablePointer.c @@ -0,0 +1,91 @@ +/*++
+
+Copyright (c) 2006 Intel Corporation. All rights reserved
+This software and associated documentation (if any) is furnished
+under a license and may only be used or copied in accordance
+with the terms of the license. Except as permitted by such
+license, no part of this software or documentation may be
+reproduced, stored in a retrieval system, or transmitted in any
+form or by any means without the express written consent of
+Intel Corporation.
+
+
+Module Name:
+
+ PeiServicesTablePointer.c
+
+Abstract:
+
+ PEI Services Table Pointer Library.
+
+--*/
+
+
+/**
+ Reads the current value of Kr1.
+
+ @return The current value of Kr1.
+
+**/
+UINT64
+EFIAPI
+AsmReadKr1 (
+ VOID
+ );
+
+/**
+ Writes the current value of Kr1.
+
+ @param Value The 64-bit value to write to Kr1.
+
+**/
+VOID
+EFIAPI
+AsmWriteKr1 (
+ IN UINT64 Value
+ );
+
+/**
+ The function returns the pointer to PeiServices.
+
+ The function returns the pointer to PeiServices.
+ It will ASSERT() if the pointer to PeiServices is NULL.
+
+ @retval The pointer to PeiServices.
+
+**/
+EFI_PEI_SERVICES **
+EFIAPI
+GetPeiServicesTablePointer (
+ VOID
+ )
+{
+ EFI_PEI_SERVICES **PeiServices;
+
+ PeiServices = (EFI_PEI_SERVICES **)(UINTN)AsmReadKr1 ();
+ ASSERT (PeiServices != NULL);
+ return PeiServices;
+}
+
+/**
+ The constructor function caches the pointer to PEI services.
+
+ The constructor function caches the pointer to PEI services.
+ It will always return EFI_SUCCESS.
+
+ @param FfsHeader Pointer to FFS header the loaded driver.
+ @param PeiServices Pointer to the PEI services.
+
+ @retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
+
+**/
+EFI_STATUS
+EFIAPI
+PeiServicesTablePointerLibConstructor (
+ IN EFI_FFS_FILE_HEADER *FfsHeader,
+ IN EFI_PEI_SERVICES **PeiServices
+ )
+{
+ AsmWriteKr1 ((UINT64)(UINTN)PeiServices);
+ return EFI_SUCCESS;
+}
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