118 lines
3.2 KiB
C
118 lines
3.2 KiB
C
/*
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* Copyright (c) 2011 Aeroflex Gaisler
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*
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* BSD license:
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <asm-leon/leonstack.h>
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#include <asm-leon/irq.h>
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#define NULL 0
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struct irqaction *_irqtbl[32] =
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{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0 };
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struct irqaction _oirqtbl[32] =
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{ INIT_IRQACTION, INIT_IRQACTION, INIT_IRQACTION, INIT_IRQACTION,
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INIT_IRQACTION, INIT_IRQACTION, INIT_IRQACTION, INIT_IRQACTION,
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INIT_IRQACTION, INIT_IRQACTION, INIT_IRQACTION, INIT_IRQACTION,
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INIT_IRQACTION, INIT_IRQACTION, INIT_IRQACTION, INIT_IRQACTION,
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INIT_IRQACTION, INIT_IRQACTION, INIT_IRQACTION, INIT_IRQACTION,
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INIT_IRQACTION, INIT_IRQACTION, INIT_IRQACTION, INIT_IRQACTION,
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INIT_IRQACTION, INIT_IRQACTION, INIT_IRQACTION, INIT_IRQACTION,
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INIT_IRQACTION, INIT_IRQACTION, INIT_IRQACTION, INIT_IRQACTION
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};
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int
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catch_interrupt (int func, int irq)
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{
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struct irqaction *a = _irqtbl[irq];
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struct irqaction *n = &_oirqtbl[irq];
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if (irq >= 32)
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return 0;
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while (a)
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{
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if (a == n)
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{
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int tmp = (int) a->handler;
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a->handler = (irqhandler) func;
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return tmp;
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}
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a = a->next;
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}
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n->handler = (irqhandler) func;
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chained_catch_interrupt (irq, n);
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return 0;
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}
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void
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chained_catch_interrupt (int irq, struct irqaction *a)
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{
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a->next = _irqtbl[irq];
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_irqtbl[irq] = a;
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}
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int no_inirq_check = 0;
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int inirq[32] = { 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0
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};
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extern struct irqmp_type irqmp;
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void (*handler_irq_pre) (void) = 0;
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void (*handler_irq_post) (void) = 0;
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handler_irq (int irq, struct leonbare_pt_regs *pt_regs)
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{
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struct irqaction *a;
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if (irq == irqmp.eirq)
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irq = irqmp.addr[48] & 0x1f;
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if (!irq)
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irq = irqmp.eirq;
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a = _irqtbl[irq];
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while (a)
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{
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if (a->handler)
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{
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#ifndef CONFIG_LEONBARE_NONESTEDIRQ
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if (no_inirq_check || !(inirq[irq]))
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{
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#endif
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inirq[irq]++;
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if (handler_irq_pre)
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handler_irq_pre ();
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a->handler (irq, a->dev_id, pt_regs);
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if (handler_irq_post)
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handler_irq_post ();
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inirq[irq]--;
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#ifndef CONFIG_LEONBARE_NONESTEDIRQ
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}
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#endif
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}
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a = a->next;
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}
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}
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schedulehandler schedule_callback = 0;
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