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111 lines
4.4 KiB
C
111 lines
4.4 KiB
C
//////////////////////////////////////////////////////////////////////////////
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// Product: QF/C++ port to ARM7/ARM9
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// Last Updated for Version: 4.5.02
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// Date of the Last Update: Nov 09, 2012
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//
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// Q u a n t u m L e a P s
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// ---------------------------
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// innovating embedded systems
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//
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// Copyright (C) 2002-2012 Quantum Leaps, LLC. All rights reserved.
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//
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// This program is open source software: you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as published
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// by the Free Software Foundation, either version 2 of the License, or
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// (at your option) any later version.
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//
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// Alternatively, this program may be distributed and modified under the
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// terms of Quantum Leaps commercial licenses, which expressly supersede
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// the GNU General Public License and are specifically designed for
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// licensees interested in retaining the proprietary status of their code.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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//
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// Contact information:
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// Quantum Leaps Web sites: http://www.quantum-leaps.com
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// http://www.state-machine.com
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// e-mail: info@quantum-leaps.com
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//////////////////////////////////////////////////////////////////////////////
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#ifndef qf_port_h
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#define qf_port_h
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// The maximum number of active objects in the application, see NOTE01
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#define QF_MAX_ACTIVE 32
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// The maximum number of event pools in the application
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#define QF_MAX_EPOOL 6
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// fast unconditional interrupt disabling/enabling for ARM state, NOTE02
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#define QF_INT_DISABLE() \
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__asm volatile ("MSR cpsr_c,#(0x1F | 0x80)" ::: "cc")
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#define QF_INT_ENABLE() \
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__asm volatile ("MSR cpsr_c,#(0x1F)" ::: "cc")
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// QF critical section entry/exit
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#ifdef __thumb__ // THUMB mode?
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// QF interrupt disabling/enabling
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#define QF_CRIT_STAT_TYPE unsigned int
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#define QF_CRIT_ENTRY(stat_) ((stat_) = QF_int_disable_SYS())
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#define QF_CRIT_EXIT(stat_) QF_int_enable_SYS(stat_)
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extern "C" QF_CRIT_STAT_TYPE QF_int_disable_SYS(void);
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extern "C" void QF_int_enable_SYS(QF_CRIT_STAT_TYPE stat);
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#elif (defined __arm__) // ARM mode?
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#define QF_CRIT_STAT_TYPE unsigned int
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#define QF_CRIT_ENTRY(stat_) do { \
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__asm volatile ("MRS %0,cpsr" : "=r" (stat_) :: "cc"); \
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QF_INT_DISABLE(); \
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} while (0)
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#define QF_CRIT_EXIT(stat_) \
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__asm volatile ("MSR cpsr_c,%0" :: "r" (stat_) : "cc")
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#else
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#error Incorrect CPU mode. Must be either __arm__ or __thumb__.
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#endif
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extern "C" {
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void QF_reset(void);
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void QF_undef(void);
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void QF_swi(void);
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void QF_pAbort(void);
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void QF_dAbort(void);
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void QF_reserved(void);
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void QF_irq(void);
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void QF_fiq_dummy(void); // see NOTE03
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void BSP_irq(void);
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}
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#include "qep_port.h" // QEP port
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#include "qvanilla.h" // "Vanilla" cooperative kernel
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#include "qf.h" // QF platform-independent public interface
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//////////////////////////////////////////////////////////////////////////////
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// NOTE01:
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// The maximum number of active objects QF_MAX_ACTIVE can be increased
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// up to 63, if necessary. Here it is set to a lower level to save some RAM.
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//
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// NOTE02:
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// The QF critical section does NOT disable the FIQ, which means that FIQ
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// is effectively a Non-Maskable Interrupt (NMI) from the kernel perspective.
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// This means that FIQ has "zero latency", but it also means that FIQ *cannot*
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// call any QF/QK services. Specifically FIQ cannot post or publish events.
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//
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// NOTE03:
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// The FIQ needs to be implemented in assembly at the application level, if it
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// is ever used. The dummy FIQ implementation provided at the port level causes
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// an exception if it is ever called.
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//
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#endif // qf_port_h
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