No functional change.
It would be nice to have handler functions in the table, like commit
e1a064f9 did for ATAPI. Left for another day.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Must set the ATAPI device signature, see ATA4 8.27.5.2 Outputs for
PACKET Command feature set devices, and ACS-2 7.36.6 Outputs for
PACKET feature set devices.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Gdb expects all registers windows to be flushed in ram, which is not the case
in Qemu. Therefore the back-trace generation doesn't work. This patch adds a
function to handle reads (and only read) in stack frames as if windows were
flushed.
Signed-off-by: Fabien Chouteau <chouteau@adacore.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
- TLB opcode group;
- region protection option (ISA, 4.6.3);
- region translation option (ISA, 4.6.4);
- MMU option (ISA, 4.6.5).
Cache control attribute bits are not used by this implementation.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Specific xtensa processor overlay for GDB contains register map in
the gdb/xtensa-config.c. This description is used by the GDB to e.g.
parse 'g' response packets and it may be reused in the qemu's gdbstub
(only XTREG definitions for non-pseudoregisters are needed).
Currently mainline GDB does not support operations with privileged SRs
(see http://sourceware.org/ml/gdb/2011-07/msg00075.html). This support
may be enabled, see NUM_CORE_REGS comment in the gdbstub.c
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
See ISA, 4.4.3 for details.
Vector addresses recorded in core configuration are absolute values that
correspond to default VECBASE value.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
See ISA, 4.7.1.3 for details.
Window check is inserted before commands that push "used register
watermark" beyond its current level. Used register watermark is reset on
instructions that change WINDOW_BASE/WINDOW_START SRs.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
See ISA, 4.4.6 (interrupt option), 4.4.7 (high priority interrupt
option) and 4.4.8 (timer interrupt option) for details.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Tensilica iss provides support for applications running in freestanding
environment through SIMCALL command. It is used by Tensilica libc to
access argc/argv, for file I/O, etc.
Note that simcalls that accept buffer addresses expect virtual addresses.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
See ISA, 4.4.4 for details.
Correct (aligned as per ISA) address for unaligned access is generated
in case this option is not enabled.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
See ISA, 4.3.3 for details.
TB flag XTENSA_TBFLAG_LITBASE is used to track enable bit of LITBASE SR.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
See ISA, 4.3.2 for details.
Operations that change LEND SR value invalidate TBs at the old and at
the new LEND. LEND value at TB compilation time is considered constant
and loop instruction is generated based on this value.
Invalidation may be avoided for the TB at the old LEND address, since
looping code verifies actual LEND value.
Invalidation may be avoided for the TB at the new LEND address if
there's a way to associate LEND address with TB at compilation time and
later verify that it doesn't change.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
See ISA, 4.7.1 for details.
Physical registers and currently visible window are separate fields in
CPUEnv. Only current window is accessible to TCG. On operations that
change window base helpers copy current window to and from physical
registers.
Window overflow check described in 4.7.1.3 is in separate patch.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
- mark privileged opcodes with ring check;
- make debug exception on exception handler entry.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
All operations in this group are no-ops, because cache ought to be
transparent to applications. However cache may be abused, then we'll
need to actually implement these opcodes.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
All operations in this group are no-ops, because there are no delayed
side effects.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Reserved opcodes must generate illegal instruction exception. Usually
they signal emulation quality problems.
Not implemented opcodes are good to see.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Special Registers hold the majority of the state added to the processor
by the options. See ISA, 5.3 for details.
User Registers hold state added in support of designer's TIE and in some
cases of options that Tensilica provides. See ISA, 5.4 for details.
Only registers mapped in sregnames or uregnames are considered valid.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
- BZ (comparison to zero);
- BI0 (comparison to signed immediate);
- BI1 (comparison to unsigned immediate);
- B (two registers comparison, bit sets comparison);
- BEQZ.N/BNEZ.N (narrow comparison to zero).
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Sample board and sample CPU core are used for debug and may be used for
development of custom SoC emulators.
This board has two fixed size memory regions for DTCM and ITCM and
variable length SRAM region.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Instructions with op0 >= 8 are 2 bytes long, others are 3 bytes long.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Set up disas_xtensa_insn switch structure, mark required options on high
level groups. Implement arithmetic/bit logic/jump/call0.
Implement code generation loop with single step/breakpoint checking.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Move mipsnet_init() function to mipssim machine
Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Remove a useless variable, spotted by clang analyzer:
/src/qemu/target-sparc/op_helper.c:3904:18: warning: unused variable 'tmp' [-Wunused-variable]
target_ulong tmp = val;
The error message is actually incorrect since the variable is used.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Avoid this warning from clang analyzer by deleting the variable:
/src/qemu/hw/lsi53c895a.c:895:5: warning: Value stored to 'id' is never read
id = (current_tag >> 8) & 0xf;
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Avoid this warning from clang analyzer:
/src/qemu/cpu-exec.c:97:5: warning: Value stored to 'phys_page2' is never read
phys_page2 = -1;
Adjust the scope of the variable while at it.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Avoid these warnings from clang analyzer:
/src/qemu/target-i386/kvm.c:772:5: warning: Value stored to 'cwd' is never read
cwd = swd = twd = 0;
/src/qemu/target-i386/kvm.c:772:11: warning: Although the value stored to 'swd' is used in the enclosing expression, the value is never actually read from 'swd'
cwd = swd = twd = 0;
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
The code does not have any effect as is, fix it.
Spotted by clang analyzer:
/src/qemu/hw/hid.c:99:13: warning: Value stored to 'x1' is never read
x1 = 1;
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Remove an unnecessary assignment, spotted by clang analyzer:
/src/qemu/qemu-io.c:995:9: warning: Value stored to 'offset' is never read
offset += reqs[i].qiov->size;
Acked-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Compile g364fb in hwlib. Two compilations less for the full build.
Acked-by: Hervé Poussineau <hpoussin@reactos.org>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
