arm: Add a 'clear PPI' method to gic_pl390
The underlying assumption that all PPIs must be edge-triggered is strained when the architected timers and VGIC interfaces make level-behaviour observable. For example, a virtual timer interrupt 'goes away' when the hypervisor is entered and the vtimer is disabled; this requires a PPI to be de-activated. The new method simply clears the interrupt pending state.
This commit is contained in:
parent
2b9138135e
commit
94d17a547c
3 changed files with 16 additions and 3 deletions
|
@ -1,5 +1,5 @@
|
|||
/*
|
||||
* Copyright (c) 2012 ARM Limited
|
||||
* Copyright (c) 2012-2013 ARM Limited
|
||||
* All rights reserved
|
||||
*
|
||||
* The license below extends only to copyright in the software and shall
|
||||
|
@ -75,6 +75,7 @@ class BaseGic : public PioDevice
|
|||
* @param cpu CPU to forward interrupt to
|
||||
*/
|
||||
virtual void sendPPInt(uint32_t num, uint32_t cpu) = 0;
|
||||
virtual void clearPPInt(uint32_t num, uint32_t cpu) = 0;
|
||||
|
||||
/**
|
||||
* Clear an interrupt from a device that is connected to the GIC.
|
||||
|
|
|
@ -692,7 +692,7 @@ Pl390::sendInt(uint32_t num)
|
|||
void
|
||||
Pl390::sendPPInt(uint32_t num, uint32_t cpu)
|
||||
{
|
||||
DPRINTF(Interrupt, "Received Interrupt number %d, cpuTarget %#x: \n",
|
||||
DPRINTF(Interrupt, "Received PPI %d, cpuTarget %#x: \n",
|
||||
num, cpu);
|
||||
cpuPpiPending[cpu] |= 1 << (num - SGI_MAX);
|
||||
updateIntState(intNumToWord(num));
|
||||
|
@ -704,6 +704,15 @@ Pl390::clearInt(uint32_t number)
|
|||
/* @todo assume edge triggered only at the moment. Nothing to do. */
|
||||
}
|
||||
|
||||
void
|
||||
Pl390::clearPPInt(uint32_t num, uint32_t cpu)
|
||||
{
|
||||
DPRINTF(Interrupt, "Clearing PPI %d, cpuTarget %#x: \n",
|
||||
num, cpu);
|
||||
cpuPpiPending[cpu] &= ~(1 << (num - SGI_MAX));
|
||||
updateIntState(intNumToWord(num));
|
||||
}
|
||||
|
||||
void
|
||||
Pl390::postInt(uint32_t cpu, Tick when)
|
||||
{
|
||||
|
|
|
@ -1,5 +1,5 @@
|
|||
/*
|
||||
* Copyright (c) 2010 ARM Limited
|
||||
* Copyright (c) 2010, 2013 ARM Limited
|
||||
* All rights reserved
|
||||
*
|
||||
* The license below extends only to copyright in the software and shall
|
||||
|
@ -287,6 +287,9 @@ class Pl390 : public BaseGic
|
|||
* Depending on the configuration, the gic may de-assert it's cpu line
|
||||
* @param number number of interrupt to send */
|
||||
void clearInt(uint32_t number);
|
||||
|
||||
/** Clear a (level-sensitive) PPI */
|
||||
void clearPPInt(uint32_t num, uint32_t cpu);
|
||||
/** @} */
|
||||
|
||||
/** @{ */
|
||||
|
|
Loading…
Reference in a new issue