Commit c3c8d6b3 authored by David Hoover's avatar David Hoover Committed by Peter Maydell
Browse files

cpu-exec.c: Allow disabling of IRQs on ARM Cortex-M CPUs 



Correct an error in the logic for deciding whether we can
take an IRQ interrupt which meant that on M profile cores
it was never possible to disable them.

The design here is still bogus in that M profile doesn't
have separate "IRQ" and "FIQ", which are an A/R profile
concept; we should ideally implement the proper priority
based scheme.

Signed-off-by: default avatarDavid Hoover <spm@boiteauxlettres.sent.at>
[PMM: Wrote a proper commit message]
Signed-off-by: default avatarPeter Maydell <peter.maydell@linaro.org>
parent f022b8e9

cpu-exec.c

+2 −2
Original line number Diff line number Diff line
@@ -618,8 +618,8 @@ int cpu_exec(CPUArchState *env) 
                       We avoid this by disabling interrupts when

                       pc contains a magic address.  */

                    if (interrupt_request & CPU_INTERRUPT_HARD

                        && ((IS_M(env) && env->regs[15] < 0xfffffff0)

                            || !(env->daif & PSTATE_I))) {

                        && !(env->daif & PSTATE_I)

                        && (!IS_M(env) || env->regs[15] < 0xfffffff0)) {

                        cpu->exception_index = EXCP_IRQ;

                        cc->do_interrupt(cpu);

                        next_tb = 0;