This series is the first part to make the OpenRISC target more
reliable and faster.
It corrects several severe problems which prevented the OpenRISC emulation
for being useful in the past.
The patchset was tested with
- the tests/tcg/openrisc tests
- booting Linux 3.11
- run configure + make + gcc of a simple terminal graphic demo called cmatrix
- run benchmark tool nbench in qemu-user mode and in the softmmu mode
The speed improvement is less than 10% because the overhead is still to high
as the openrisc target does not support translation block chaining.
This will be included in one of the future patches.
Only the patch which removes the npc and ppc variables removes a little feature
from the OpenRISC target but which does not break the specification and will
lead to
a significant speed improvement.
Sebastian Macke (9):
target-openrisc: Speed up move instruction
target-openrisc: Remove unnecessary code generated by jump
instructions
target-openrisc: Remove executable flag for every page
target-openrisc: Correct wrong epcr register in interrupt handler
openrisc-timer: Reduce overhead, Separate clock update functions
target-openrisc: Correct memory bounds checking for the tlb buffers
target-openrisc: Separate branch flag from Supervision register
target-openrisc: Complete remove of npc and ppc variables
target-openrisc: Correct carry flag check of l.addc and l.addic test
cases
hw/openrisc/cputimer.c | 29 ++++--
target-openrisc/cpu.c | 1 +
target-openrisc/cpu.h | 16 ++-
target-openrisc/gdbstub.c | 20 +---
target-openrisc/interrupt.c | 27 ++---
target-openrisc/interrupt_helper.c | 3 +-
target-openrisc/machine.c | 3 +-
target-openrisc/mmu.c | 4 +-
target-openrisc/sys_helper.c | 74 ++++++--------
target-openrisc/translate.c | 201 ++++++++++++++++---------------------
tests/tcg/openrisc/test_addc.c | 8 +-
tests/tcg/openrisc/test_addic.c | 10 +-
12 files changed, 175 insertions(+), 221 deletions(-)
--
1.8.4.1
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