+++ /dev/null
-need to review ASTAT write behavior
-
-how to model RETE and IVG0 bit in IPEND ...
-
-model the loop buffer ? this means no ifetches because they're cached.
-see page 4-26 in Blackfin PRM under hardware loops.
-
-handle DSPID at 0xffe05000
-
-CEC should handle multiple exceptions at same address. would need
-exception processing to be delayed ? at least needs a stack for
-the CEC to pop things off.
-
-R0 = [SP++]; gets traced as R0 = [P6++];
-
-merge dv-bfin_evt with dv-bfin_cec since the EVT regs are part of the CEC
-
-fix single stepping over debug assert instructions in hardware
-
-exception in IVG5 causes double fault ?
-
-SIC int forwarding doesn't accurately reflect the hardware. what the sim
-does is:
- - device generates an interrupt
- - int is sent to SIC
- - SIC logs it into its ISR
- - so long as SIC's IMASK allows it, bits set in ISR generate
- an interrupt to the CEC
- - no way to clear the SIC's ISR
-the way the hardware works is that the device monitors the interrupt level and
-the SIC's ISR bits are basically hardwired from each peripheral. so when the
-device has its interrupt cleared, the bit in the SIC's ISR is automatically
-cleared as well.
-perhaps the only way to model this behavior in the sim is to have each device
-set up an event callback that sends out a port event: a level of 0 means the
-int has been ACKed and the SIC can clear its ISR while a level of 1 means the
-int is being generated still. if the device is still generating an interrupt,
-it can reschedule itself again.
-
-insns that cause an interrupt don't seem to be processed at the right time.
-for example, setup a glue device that generates an interrupt upon right.
-when the store insn is executed, the interrupt is taken right away instead
-of being scheduled *after* the insn has finished executing. difference is
-that RETI needs to point to the *next* insn and not the store insn.
-
-tests:
- - check AN bits with Dreg subtraction
- R0 = R1 - R2;
- - check astat bits with vector add/sub +|+
- - check acc with VIT_MAX and similiar insns
-
-flush[0xffa00000] causes HWERR in sim but not on hardware ?
-
-convert to using do_hw_attach_regs ?
projects / binutils-gdb.git / commitdiff