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/* |
/* |
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* Copyright (C) 2005-2006 Anders Gavare. All rights reserved. |
* Copyright (C) 2005-2007 Anders Gavare. All rights reserved. |
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* |
* |
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* Redistribution and use in source and binary forms, with or without |
* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are met: |
* modification, are permitted provided that the following conditions are met: |
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* SUCH DAMAGE. |
* SUCH DAMAGE. |
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* |
* |
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* |
* |
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* $Id: dev_8259.c,v 1.25 2006/07/21 16:55:41 debug Exp $ |
* $Id: dev_8259.c,v 1.30 2007/06/15 18:13:04 debug Exp $ |
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* |
* |
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* 8259 Programmable Interrupt Controller. |
* COMMENT: Intel 8259 Programmable Interrupt Controller |
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* |
* |
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* See the following URL for more details: |
* See the following URL for more details: |
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* http://www.nondot.org/sabre/os/files/MiscHW/8259pic.txt |
* http://www.nondot.org/sabre/os/files/MiscHW/8259pic.txt |
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DEVICE_ACCESS(8259) |
DEVICE_ACCESS(8259) |
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{ |
{ |
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struct pic8259_data *d = (struct pic8259_data *) extra; |
struct pic8259_data *d = extra; |
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uint64_t idata = 0, odata = 0; |
uint64_t idata = 0, odata = 0; |
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int i; |
int i; |
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d->isr = 0; |
d->isr = 0; |
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/* Recalculate interrupt assertions, |
/* Recalculate interrupt assertions, |
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if necessary: */ |
if necessary: */ |
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if ((old_irr & ~d->ier) != (d->irr & ~d->ier)) |
if ((old_irr & ~d->ier) != (d->irr & ~d->ier)) { |
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cpu_interrupt(cpu, d->irq_nr); |
if (d->irr & ~d->ier) |
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INTERRUPT_ASSERT(d->irq); |
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else |
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INTERRUPT_DEASSERT(d->irq); |
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} |
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} else if ((idata >= 0x21 && idata <= 0x27) || |
} else if ((idata >= 0x21 && idata <= 0x27) || |
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(idata >= 0x60 && idata <= 0x67) || |
(idata >= 0x60 && idata <= 0x67) || |
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(idata >= 0xe0 && idata <= 0xe7)) { |
(idata >= 0xe0 && idata <= 0xe7)) { |
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d->irr &= ~(1 << (idata & 7)); |
d->irr &= ~(1 << (idata & 7)); |
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d->isr &= ~(1 << (idata & 7)); |
d->isr &= ~(1 << (idata & 7)); |
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/* Recalc. int assertions, if necessary: */ |
/* Recalc. int assertions, if necessary: */ |
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if ((old_irr & ~d->ier) != (d->irr & ~d->ier)) |
if ((old_irr & ~d->ier) != (d->irr & ~d->ier)) { |
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cpu_interrupt(cpu, d->irq_nr); |
if (d->irr & ~d->ier) |
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INTERRUPT_ASSERT(d->irq); |
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else |
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INTERRUPT_DEASSERT(d->irq); |
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} |
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} else if (idata == 0x68) { |
} else if (idata == 0x68) { |
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/* Set Special Mask Mode */ |
/* Set Special Mask Mode */ |
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/* TODO */ |
/* TODO */ |
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/* Recalculate interrupt assertions, |
/* Recalculate interrupt assertions, |
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if necessary: */ |
if necessary: */ |
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if ((d->irr & ~old_ier) != (d->irr & ~d->ier)) |
if ((d->irr & ~old_ier) != (d->irr & ~d->ier)) { |
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cpu_interrupt(cpu, d->irq_nr); |
if (d->irr & ~d->ier) |
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INTERRUPT_ASSERT(d->irq); |
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else |
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INTERRUPT_DEASSERT(d->irq); |
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} |
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} else { |
} else { |
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odata = d->ier; |
odata = d->ier; |
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} |
} |
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*/ |
*/ |
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DEVINIT(8259) |
DEVINIT(8259) |
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{ |
{ |
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struct pic8259_data *d = malloc(sizeof(struct pic8259_data)); |
struct pic8259_data *d; |
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char *name2; |
char *name2; |
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size_t nlen = strlen(devinit->name) + 20; |
size_t nlen = strlen(devinit->name) + 20; |
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if (d == NULL) { |
CHECK_ALLOCATION(d = malloc(sizeof(struct pic8259_data))); |
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fprintf(stderr, "out of memory\n"); |
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exit(1); |
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} |
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memset(d, 0, sizeof(struct pic8259_data)); |
memset(d, 0, sizeof(struct pic8259_data)); |
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d->irq_nr = devinit->irq_nr; |
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name2 = malloc(nlen); |
INTERRUPT_CONNECT(devinit->interrupt_path, d->irq); |
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CHECK_ALLOCATION(name2 = malloc(nlen)); |
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snprintf(name2, nlen, "%s", devinit->name); |
snprintf(name2, nlen, "%s", devinit->name); |
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if ((devinit->addr & 0xfff) == 0xa0) { |
if ((devinit->addr & 0xfff) == 0xa0) { |
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strlcat(name2, " [secondary]", nlen); |
strlcat(name2, " [secondary]", nlen); |