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| author | Peter Maydell <peter.maydell@linaro.org> | 2018-02-09 10:40:27 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2018-02-09 10:40:27 +0000 |
| commit | 5ede82b8ccb652382c106d53f656ed67997d76e8 (patch) | |
| tree | 5cb07376ff9a1fb8f4fde333a8b081cd7ecffd23 /hw/intc/trace-events | |
| parent | 04bb7fe2bf55bdf66d5b7a5a719b40bbb4048178 (diff) | |
| download | qemu-5ede82b8ccb652382c106d53f656ed67997d76e8.zip | |
target/arm: Add armv7m_nvic_set_pending_derived()
In order to support derived exceptions (exceptions generated in
the course of trying to take an exception), we need to be able
to handle prioritizing whether to take the original exception
or the derived exception.
We do this by introducing a new function
armv7m_nvic_set_pending_derived() which the exception-taking code in
helper.c will call when a derived exception occurs. Derived
exceptions are dealt with mostly like normal pending exceptions, so
we share the implementation with the armv7m_nvic_set_pending()
function.
Note that the way we structure this is significantly different
from the v8M Arm ARM pseudocode: that does all the prioritization
logic in the DerivedLateArrival() function, whereas we choose to
let the existing "identify highest priority exception" logic
do the prioritization for us. The effect is the same, though.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 1517324542-6607-2-git-send-email-peter.maydell@linaro.org
Diffstat (limited to 'hw/intc/trace-events')
| -rw-r--r-- | hw/intc/trace-events | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/hw/intc/trace-events b/hw/intc/trace-events index be769186fc..09e87d14bd 100644 --- a/hw/intc/trace-events +++ b/hw/intc/trace-events @@ -177,7 +177,7 @@ nvic_set_prio(int irq, bool secure, uint8_t prio) "NVIC set irq %d secure-bank % nvic_irq_update(int vectpending, int pendprio, int exception_prio, int level) "NVIC vectpending %d pending prio %d exception_prio %d: setting irq line to %d" nvic_escalate_prio(int irq, int irqprio, int runprio) "NVIC escalating irq %d to HardFault: insufficient priority %d >= %d" nvic_escalate_disabled(int irq) "NVIC escalating irq %d to HardFault: disabled" -nvic_set_pending(int irq, bool secure, int en, int prio) "NVIC set pending irq %d secure-bank %d (enabled: %d priority %d)" +nvic_set_pending(int irq, bool secure, bool derived, int en, int prio) "NVIC set pending irq %d secure-bank %d derived %d (enabled: %d priority %d)" nvic_clear_pending(int irq, bool secure, int en, int prio) "NVIC clear pending irq %d secure-bank %d (enabled: %d priority %d)" nvic_set_pending_level(int irq) "NVIC set pending: irq %d higher prio than vectpending: setting irq line to 1" nvic_acknowledge_irq(int irq, int prio, bool targets_secure) "NVIC acknowledge IRQ: %d now active (prio %d targets_secure %d)" |