diff options
| author | andrewfish <andrewfish@6f19259b-4bc3-4df7-8a09-765794883524> | 2010-07-22 19:22:34 +0000 |
|---|---|---|
| committer | andrewfish <andrewfish@6f19259b-4bc3-4df7-8a09-765794883524> | 2010-07-22 19:22:34 +0000 |
| commit | 5fc3b5d6c8f3f23823069f060e8ffc8f80bccdf7 (patch) | |
| tree | eea72342052d6a03beb207bc579884b008f531eb /UnixPkg/Library/UnixBaseLib/X64/CpuId.S | |
| parent | 7119d96a6fdd28b2e215b20f97996193ca871a57 (diff) | |
| download | edk2-platforms-5fc3b5d6c8f3f23823069f060e8ffc8f80bccdf7.tar.xz | |
Added to support X64 port (with SV5 ABI). May be able to remove after we port everything, but Sec, to EFI X64 ABI.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10683 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'UnixPkg/Library/UnixBaseLib/X64/CpuId.S')
| -rw-r--r-- | UnixPkg/Library/UnixBaseLib/X64/CpuId.S | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/UnixPkg/Library/UnixBaseLib/X64/CpuId.S b/UnixPkg/Library/UnixBaseLib/X64/CpuId.S new file mode 100644 index 0000000000..c3d2597205 --- /dev/null +++ b/UnixPkg/Library/UnixBaseLib/X64/CpuId.S @@ -0,0 +1,60 @@ +#------------------------------------------------------------------------------
+#
+# Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
+# This program and the accompanying materials
+# are licensed and made available under the terms and conditions of the BSD License
+# which accompanies this distribution. The full text of the license may be found at
+# http://opensource.org/licenses/bsd-license.php.
+#
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+# Module Name:
+#
+# CpuId.S
+#
+# Abstract:
+#
+# AsmCpuid function
+#
+# Notes:
+#
+#------------------------------------------------------------------------------
+
+#------------------------------------------------------------------------------
+# VOID
+# EFIAPI
+# AsmCpuid (
+# IN UINT32 RegisterInEax,
+# OUT UINT32 *RegisterOutEax OPTIONAL,
+# OUT UINT32 *RegisterOutEbx OPTIONAL,
+# OUT UINT32 *RegisterOutEcx OPTIONAL,
+# OUT UINT32 *RegisterOutEdx OPTIONAL
+# )
+#------------------------------------------------------------------------------
+ASM_GLOBAL ASM_PFX(AsmCpuid)
+ASM_PFX(AsmCpuid):
+ push %rbx
+ mov %ecx, %eax
+ push %rax # save Index on stack
+ push %rdx
+ cpuid
+ test %r9, %r9
+ jz L1
+ mov %ecx, (%r9)
+L1:
+ pop %rcx
+ jrcxz L2
+ mov %eax, (%rcx)
+L2:
+ mov %r8, %rcx
+ jrcxz L3
+ mov %ebx, (%rcx)
+L3:
+ mov 0x38(%rsp), %rcx
+ jrcxz L4
+ mov %edx, (%rcx)
+L4:
+ pop %rax # restore Index to rax as return value
+ pop %rbx
+ ret
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