diff options
| author | nyan <nyan@FreeBSD.org> | 2000-07-30 07:45:02 +0000 |
|---|---|---|
| committer | nyan <nyan@FreeBSD.org> | 2000-07-30 07:45:02 +0000 |
| commit | f772c8fd802fcbf1ddb2c13189f5e3f29078597f (patch) | |
| tree | a0bc1f598c3144496bc0bce50c8126ce64d24ce9 /sys/boot | |
| parent | d6df8f88c448c17f8c2bb84ee240e2d12c32b3f3 (diff) | |
| download | FreeBSD-src-f772c8fd802fcbf1ddb2c13189f5e3f29078597f.zip FreeBSD-src-f772c8fd802fcbf1ddb2c13189f5e3f29078597f.tar.gz | |
Merged from sys/boot/i386/btx/btx/btx.s revisions from 1.18 to 1.22.
Diffstat (limited to 'sys/boot')
| -rw-r--r-- | sys/boot/pc98/btx/btx/btx.S | 43 | ||||
| -rw-r--r-- | sys/boot/pc98/btx/btx/btx.s | 43 |
2 files changed, 74 insertions, 12 deletions
diff --git a/sys/boot/pc98/btx/btx/btx.S b/sys/boot/pc98/btx/btx/btx.S index ddfde78..14a5b0d 100644 --- a/sys/boot/pc98/btx/btx/btx.S +++ b/sys/boot/pc98/btx/btx/btx.S @@ -560,9 +560,15 @@ v86mon.2: cmpb $0xf4,%al # HLT? cmpl $inthlt+0x1,%esi # Is inthlt? jne v86mon.7 # No (ignore) jmp intrtn # Return to user mode -v86mon.3: cmpb $0xf,%al # Is - jne v86mon.4 # this - cmpb $0x20,(%esi) # a +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? + je v86rdmsr # Yes + cmpb $0x20,(%esi) # Is this a jne v86mon.4 # MOV EAX,CR0 cmpb $0xc0,0x1(%esi) # instruction? je v86mov # Yes @@ -600,10 +606,35 @@ 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 + jmp v86preret # Finish up +# +# Emulate RDMSR +# +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 + jmp v86preret # Finish up +# # Emulate CLI. # v86cli: andb $~0x2,0x31(%ebp) # Clear IF @@ -1174,7 +1205,7 @@ dmpfmt: .byte '\n' # "\n" .byte 0x80|DMP_MEM|DMP_EOL,0x48 # "00 00 ... 00 00\n" .ascii "ss:esp" # "ss:esp=" .byte 0x80|DMP_MEM|DMP_EOL,0x0 # "00 00 ... 00 00\n" - .asciz "System halted" # End + .asciz "BTX halted" # End # # End of BTX memory. # diff --git a/sys/boot/pc98/btx/btx/btx.s b/sys/boot/pc98/btx/btx/btx.s index ddfde78..14a5b0d 100644 --- a/sys/boot/pc98/btx/btx/btx.s +++ b/sys/boot/pc98/btx/btx/btx.s @@ -560,9 +560,15 @@ v86mon.2: cmpb $0xf4,%al # HLT? cmpl $inthlt+0x1,%esi # Is inthlt? jne v86mon.7 # No (ignore) jmp intrtn # Return to user mode -v86mon.3: cmpb $0xf,%al # Is - jne v86mon.4 # this - cmpb $0x20,(%esi) # a +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? + je v86rdmsr # Yes + cmpb $0x20,(%esi) # Is this a jne v86mon.4 # MOV EAX,CR0 cmpb $0xc0,0x1(%esi) # instruction? je v86mov # Yes @@ -600,10 +606,35 @@ 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 + jmp v86preret # Finish up +# +# Emulate RDMSR +# +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 + jmp v86preret # Finish up +# # Emulate CLI. # v86cli: andb $~0x2,0x31(%ebp) # Clear IF @@ -1174,7 +1205,7 @@ dmpfmt: .byte '\n' # "\n" .byte 0x80|DMP_MEM|DMP_EOL,0x48 # "00 00 ... 00 00\n" .ascii "ss:esp" # "ss:esp=" .byte 0x80|DMP_MEM|DMP_EOL,0x0 # "00 00 ... 00 00\n" - .asciz "System halted" # End + .asciz "BTX halted" # End # # End of BTX memory. # |
