diff options
| author | jhb <jhb@FreeBSD.org> | 2000-07-06 00:13:21 +0000 |
|---|---|---|
| committer | jhb <jhb@FreeBSD.org> | 2000-07-06 00:13:21 +0000 |
| commit | 1ebf348bd078d6c908fd9dae35b458b526cf8f7e (patch) | |
| tree | ab2e2369b56807ba7a7a80186cbfb61eb446b846 /sys/boot/i386/btx | |
| parent | be25e6d5a3011595e06fb10a53a7587b25568915 (diff) | |
| download | FreeBSD-src-1ebf348bd078d6c908fd9dae35b458b526cf8f7e.zip FreeBSD-src-1ebf348bd078d6c908fd9dae35b458b526cf8f7e.tar.gz | |
Emulate the WBINVD instruction when it is called by the BIOS.
Diffstat (limited to 'sys/boot/i386/btx')
| -rw-r--r-- | sys/boot/i386/btx/btx/btx.S | 21 | ||||
| -rw-r--r-- | sys/boot/i386/btx/btx/btx.s | 21 |
2 files changed, 30 insertions, 12 deletions
diff --git a/sys/boot/i386/btx/btx/btx.S b/sys/boot/i386/btx/btx/btx.S index 827a444..48729cf 100644 --- a/sys/boot/i386/btx/btx/btx.S +++ b/sys/boot/i386/btx/btx/btx.S @@ -480,6 +480,8 @@ v86mon.2: cmpb $0xf4,%al # HLT? jmp intrtn # Return to user mode v86mon.3: cmpb $0xf,%al # Prefixed instruction? jne v86mon.4 # No + cmpb $0x09,(%esi) # Is it a WBINVD? + je v86wbinvd # Yes cmpb $0x30,(%esi) # Is it a WRMSR? je v86wrmsr # Yes cmpb $0x32,(%esi) # Is it a RDMSR? @@ -522,18 +524,26 @@ v86mon.7: subl %edi,%esi # From linear # v86mov: movl %cr0,%eax # CR0 to movl %eax,0x1c(%ebp) # saved EAX - incl %esi # Adjust - incl %esi # IP + incl %esi # Adjust IP +# +# Return from emulating a 0x0f prefixed instruction +# +v86preret: incl %esi # Adjust IP jmp v86mon.7 # Finish up # +# Emulate WBINVD +# +v86wbinvd: wbinvd # Write back and invalidate + # cache + jmp v86preret # Finish up +# # Emulate WRMSR # v86wrmsr: movl 0x18(%ebp),%ecx # Get user's %ecx (MSR to write) movl 0x14(%ebp),%edx # Load the value movl 0x1c(%ebp),%eax # to write wrmsr # Write MSR - incl %esi # Adjust IP - jmp v86mon.7 # Finish up + jmp v86preret # Finish up # # Emulate RDMSR # @@ -541,8 +551,7 @@ v86rdmsr: movl 0x18(%ebp),%ecx # MSR to read rdmsr # Read the MSR movl %eax,0x1c(%ebp) # Return the value of movl %edx,0x14(%ebp) # the MSR to the user - incl %esi # Adjust IP - jmp v86mon.7 + jmp v86preret # Finish up # # Emulate CLI. # diff --git a/sys/boot/i386/btx/btx/btx.s b/sys/boot/i386/btx/btx/btx.s index 827a444..48729cf 100644 --- a/sys/boot/i386/btx/btx/btx.s +++ b/sys/boot/i386/btx/btx/btx.s @@ -480,6 +480,8 @@ v86mon.2: cmpb $0xf4,%al # HLT? jmp intrtn # Return to user mode v86mon.3: cmpb $0xf,%al # Prefixed instruction? jne v86mon.4 # No + cmpb $0x09,(%esi) # Is it a WBINVD? + je v86wbinvd # Yes cmpb $0x30,(%esi) # Is it a WRMSR? je v86wrmsr # Yes cmpb $0x32,(%esi) # Is it a RDMSR? @@ -522,18 +524,26 @@ v86mon.7: subl %edi,%esi # From linear # v86mov: movl %cr0,%eax # CR0 to movl %eax,0x1c(%ebp) # saved EAX - incl %esi # Adjust - incl %esi # IP + incl %esi # Adjust IP +# +# Return from emulating a 0x0f prefixed instruction +# +v86preret: incl %esi # Adjust IP jmp v86mon.7 # Finish up # +# Emulate WBINVD +# +v86wbinvd: wbinvd # Write back and invalidate + # cache + jmp v86preret # Finish up +# # Emulate WRMSR # v86wrmsr: movl 0x18(%ebp),%ecx # Get user's %ecx (MSR to write) movl 0x14(%ebp),%edx # Load the value movl 0x1c(%ebp),%eax # to write wrmsr # Write MSR - incl %esi # Adjust IP - jmp v86mon.7 # Finish up + jmp v86preret # Finish up # # Emulate RDMSR # @@ -541,8 +551,7 @@ v86rdmsr: movl 0x18(%ebp),%ecx # MSR to read rdmsr # Read the MSR movl %eax,0x1c(%ebp) # Return the value of movl %edx,0x14(%ebp) # the MSR to the user - incl %esi # Adjust IP - jmp v86mon.7 + jmp v86preret # Finish up # # Emulate CLI. # |
