Another week, another set of v8M patches.
This lot adds:
* v8M and security extension changes in exception entry and exit
* the Security Attribution Unit
* SG and BLXNS instructions
* secure function return
* and a couple of fixes for bugs in already-in-master changes
Most of this is just plodding through fairly obvious implementation,
but the handling of the SG instruction is a bit funky (see commit
messages in those patches for detail).
This is very nearly enough to get the mbed uvisor example
running (on a hacked-up mps2 setup): I think the main missing
piece for that is that it expects the banked systick device,
which we haven't implemented yet. (There are also various
missing things that I don't think the uvisor exercises.)
thanks
-- PMM
Peter Maydell (20):
nvic: Clear the vector arrays and prigroup on reset
target/arm: Don't switch to target stack early in v7M exception return
target/arm: Prepare for CONTROL.SPSEL being nonzero in Handler mode
target/arm: Restore security state on exception return
target/arm: Restore SPSEL to correct CONTROL register on exception
return
target/arm: Check for xPSR mismatch usage faults earlier for v8M
target/arm: Warn about restoring to unaligned stack
target/arm: Don't warn about exception return with PC low bit set for
v8M
target/arm: Add new-in-v8M SFSR and SFAR
target/arm: Update excret sanity checks for v8M
target/arm: Add support for restoring v8M additional state context
target/arm: Add v8M support to exception entry code
nvic: Implement Security Attribution Unit registers
target/arm: Implement security attribute lookups for memory accesses
target/arm: Fix calculation of secure mm_idx values
target/arm: Factor out "get mmuidx for specified security state"
target/arm: Implement SG instruction
target/arm: Implement BLXNS
target/arm: Implement secure function return
nvic: Add missing code for writing SHCSR.HARDFAULTPENDED bit
target/arm/cpu.h | 60 ++-
target/arm/helper.h | 1 +
target/arm/internals.h | 23 ++
hw/intc/armv7m_nvic.c | 158 +++++++-
target/arm/cpu.c | 27 ++
target/arm/helper.c | 970 ++++++++++++++++++++++++++++++++++++++++++++-----
target/arm/machine.c | 16 +
target/arm/translate.c | 31 +-
8 files changed, 1181 insertions(+), 105 deletions(-)
--
2.7.4
