diff options
Diffstat (limited to 'UnixPkg/Library/UnixBaseLib/X64/CpuIdEx.S')
| -rw-r--r-- | UnixPkg/Library/UnixBaseLib/X64/CpuIdEx.S | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/UnixPkg/Library/UnixBaseLib/X64/CpuIdEx.S b/UnixPkg/Library/UnixBaseLib/X64/CpuIdEx.S new file mode 100644 index 0000000000..d47f53c84c --- /dev/null +++ b/UnixPkg/Library/UnixBaseLib/X64/CpuIdEx.S @@ -0,0 +1,62 @@ +#------------------------------------------------------------------------------
+#
+# 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:
+#
+# CpuIdEx.S
+#
+# Abstract:
+#
+# AsmCpuidEx function
+#
+# Notes:
+#
+#------------------------------------------------------------------------------
+
+#------------------------------------------------------------------------------
+# UINT32
+# EFIAPI
+# AsmCpuidEx (
+# IN UINT32 RegisterInEax,
+# IN UINT32 RegisterInEcx,
+# OUT UINT32 *RegisterOutEax OPTIONAL,
+# OUT UINT32 *RegisterOutEbx OPTIONAL,
+# OUT UINT32 *RegisterOutEcx OPTIONAL,
+# OUT UINT32 *RegisterOutEdx OPTIONAL
+# )
+#------------------------------------------------------------------------------
+ASM_GLOBAL ASM_PFX(AsmCpuidEx)
+ASM_PFX(AsmCpuidEx):
+ push %rbx
+ movl %ecx,%eax
+ movl %edx,%ecx
+ push %rax # save Index on stack
+ cpuid
+ mov 0x38(%rsp), %r10
+ test %r10, %r10
+ jz L1
+ mov %ecx,(%r10)
+L1:
+ mov %r8, %rcx
+ jrcxz L2
+ movl %eax,(%rcx)
+L2:
+ mov %r9, %rcx
+ jrcxz L3
+ mov %ebx, (%rcx)
+L3:
+ mov 0x40(%rsp), %rcx
+ jrcxz L4
+ mov %edx, (%rcx)
+L4:
+ pop %rax # restore Index to rax as return value
+ pop %rbx
+ ret
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