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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: src/ssx/ppc405/ppc405_irq_init.c $ */
/* */
/* OpenPOWER OnChipController Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2014,2016 */
/* [+] International Business Machines Corp. */
/* */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); */
/* you may not use this file except in compliance with the License. */
/* You may obtain a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or */
/* implied. See the License for the specific language governing */
/* permissions and limitations under the License. */
/* */
/* IBM_PROLOG_END_TAG */
/// \file ppc405_irq_init.c
/// \brief PPC405 IRQ initialization routines
///
/// The entry points in this file are routines that are typically used during
/// initialization, and their code space could be deallocated and recovered if
/// no longer needed by the application after initialization.
#include "ssx.h"
/// Set up a PPC405 Fixed Interval Timer (FIT) handler
///
/// See the SSX specification for full details on setting up a FIT handler.
///
/// Return values other then SSX_OK (0) are errors; see \ref ssx_errors
///
/// \retval 0 Successful completion
///
/// \retval -SSX_INVALID_ARGUMENT_PPC405_FIT The \a tcr_fp argument was
/// invalid when called with a non-null (non-0) \a handler.
// Since the SSX_CRITICAL Watchdog interrupt is also controlled by the TCR, we
// need to enter an SSX_CRITICAL critical section to manipulate the TCR.
int
ppc405_fit_setup(int tcr_fp, SsxIrqHandler handler, void* arg)
{
SsxMachineContext ctx;
Ppc405TCR tcr;
if (SSX_ERROR_CHECK_API && handler)
{
SSX_ERROR_IF((tcr_fp < 0) ||
(tcr_fp > 3),
SSX_INVALID_ARGUMENT_PPC405_FIT);
}
ssx_critical_section_enter(SSX_CRITICAL, &ctx);
tcr.value = mfspr(SPRN_TCR);
if (handler)
{
tcr.fields.fp = tcr_fp;
tcr.fields.fie = 1;
__ppc405_fit_routine = handler;
__ppc405_fit_arg = arg;
}
else
{
tcr.fields.fie = 0;
}
mtspr(SPRN_TCR, tcr.value);
isync();
ssx_critical_section_exit(&ctx);
return SSX_OK;
}
/// Set up a PPC405 Watchdog interrupt handler
///
/// See the SSX specification for full details on setting up a watchdog
/// handler.
///
/// Return values other then SSX_OK (0) are errors; see \ref ssx_errors
///
/// \retval 0 Successful completion
///
/// \retval -SSX_INVALID_ARGUMENT_PPC405_WATCHDOG One or more of the \a tcr_wp
/// or \a tcr_wrc arguments were invalid.
int
ppc405_watchdog_setup(int tcr_wp, int tcr_wrc,
SsxIrqHandler handler, void* arg)
{
SsxMachineContext ctx;
Ppc405TCR tcr;
if (SSX_ERROR_CHECK_API)
{
SSX_ERROR_IF((tcr_wp < 0) ||
(tcr_wp > 3) ||
(tcr_wrc < 0) ||
(tcr_wrc > 3),
SSX_INVALID_ARGUMENT_PPC405_WATCHDOG);
}
ssx_critical_section_enter(SSX_CRITICAL, &ctx);
mtspr(SPRN_TSR, TSR_ENW | TSR_WIS);
tcr.value = mfspr(SPRN_TCR);
tcr.fields.wp = tcr_wp;
tcr.fields.wrc = tcr_wrc;
if (handler == 0)
{
// Reinstall the default handler and clear the interrupt enable. Then
// clear any pending interrupt status.
// WIS.
__ppc405_watchdog_routine = __ppc405_default_irq_handler;
__ppc405_watchdog_arg = 0;
tcr.fields.wie = 0;
mtspr(SPRN_TCR, tcr.value);
isync();
mtspr(SPRN_TSR, TSR_WIS);
isync();
}
else
{
// Install the new handler and enable the watchdog interrup.
__ppc405_watchdog_routine = handler;
__ppc405_watchdog_arg = arg;
tcr.fields.wie = 1;
mtspr(SPRN_TCR, tcr.value);
isync();
}
ssx_critical_section_exit(&ctx);
return SSX_OK;
}
/// Set up a PPC405 Debug interrupt handler
///
/// See the SSX specification for full details on setting up a debug handler.
///
/// Return values other then SSX_OK (0) are errors; see \ref ssx_errors
///
/// \retval 0 Successful completion
///
/// \retval -SSX_INVALID_ARGUMENT_PPC405_DEBUG The \a handler argument
/// is null (0).
// The debug handler is installed in an SSX_CRITICAL critical section with all
// debug interrupts disabled as well.
int
ppc405_debug_setup(SsxIrqHandler handler, void* arg)
{
SsxMachineContext ctx;
ssx_critical_section_enter(SSX_CRITICAL, &ctx);
andc_msr(MSR_DE | MSR_DWE);
__ppc405_debug_routine = handler;
__ppc405_debug_arg = arg;
isync();
ssx_critical_section_exit(&ctx);
return SSX_OK;
}
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