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Emulate the WBINVD instruction when it is called by the BIOS.

This commit is contained in:
John Baldwin 2000-07-06 00:13:21 +00:00
parent b26e03e907
commit bd61ce880f
2 changed files with 30 additions and 12 deletions
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21
sys/boot/i386/btx/btx/btx.S
View File

@ -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.
#

21
sys/boot/i386/btx/btx/btx.s
View File

@ -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.
#