5255fcf8e4
Instead of looking up the pending priority in nvic_pending_prio(), cache it in a new state struct field. The calculation of the pending priority given the interrupt number is more complicated in v8M with the security extension, so the caching will be worthwhile. This changes nvic_pending_prio() from returning a full (group + subpriority) priority value to returning a group priority. This doesn't require changes to its callsites because we use it only in comparisons of the form execution_prio > nvic_pending_prio() and execution priority is always a group priority, so a test (exec prio > full prio) is true if and only if (execprio > group_prio). (Architecturally the expected comparison is with the group priority for this sort of "would we preempt" test; we were only doing a test with a full priority as an optimisation to avoid the mask, which is possible precisely because the two comparisons always give the same answer.) Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 1505240046-11454-5-git-send-email-peter.maydell@linaro.org |
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| .. | ||
| allwinner-a10-pic.h | ||
| arm_gic_common.h | ||
| arm_gic.h | ||
| arm_gicv3_common.h | ||
| arm_gicv3_its_common.h | ||
| arm_gicv3.h | ||
| armv7m_nvic.h | ||
| aspeed_vic.h | ||
| bcm2835_ic.h | ||
| bcm2836_control.h | ||
| imx_avic.h | ||
| intc.h | ||
| mips_gic.h | ||
| realview_gic.h | ||