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implement interrupt enable/disable and mapping as described in 

the Digital Semiconductor AlphaPC 164 Motherboard Technical Reference
Manual.  This may not work, but it's the best i can do with the
documentation I have.
This commit is contained in:
cgd 1996-11-17 02:30:25 +00:00
parent ccc668e0d7
commit e35cd5615f
1 changed files with 151 additions and 97 deletions
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242
sys/arch/alpha/pci/pci_eb164.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: pci_eb164.c,v 1.2 1996/11/13 21:13:30 cgd Exp $ */
/* $NetBSD: pci_eb164.c,v 1.3 1996/11/17 02:30:25 cgd Exp $ */
/*
* Copyright (c) 1995, 1996 Carnegie-Mellon University.
@ -64,8 +64,21 @@ void *dec_eb164_intr_establish __P((void *, pci_intr_handle_t,
int, int (*func)(void *), void *));
void dec_eb164_intr_disestablish __P((void *, void *));
void eb164_pci_strayintr __P((int irq));
#define EB164_SIO_IRQ 4
#define EB164_MAX_IRQ 24
#define PCI_STRAY_MAX 5
struct alpha_shared_intr *eb164_pci_intr;
#ifdef EVCNT_COUNTERS
struct evcnt eb164_intr_evcnt;
#endif
bus_space_tag_t eb164_intrgate_iot;
bus_space_handle_t eb164_intrgate_ioh;
void eb164_iointr __P((void *framep, unsigned long vec));
void eb164_enable_intr __P((int irq));
void eb164_disable_intr __P((int irq));
void
pci_eb164_pickintr(ccp)
@ -73,6 +86,7 @@ pci_eb164_pickintr(ccp)
{
bus_space_tag_t iot = ccp->cc_iot;
pci_chipset_tag_t pc = &ccp->cc_pc;
int i;
pc->pc_intr_v = ccp;
pc->pc_intr_map = dec_eb164_intr_map;
@ -80,20 +94,24 @@ pci_eb164_pickintr(ccp)
pc->pc_intr_establish = dec_eb164_intr_establish;
pc->pc_intr_disestablish = dec_eb164_intr_disestablish;
eb164_intrgate_iot = iot;
if (bus_space_map(eb164_intrgate_iot, 0x804, 3, 0,
&eb164_intrgate_ioh) != 0)
panic("pci_eb164_pickintr: couldn't map interrupt PLD");
for (i = 0; i < EB164_MAX_IRQ; i++)
eb164_disable_intr(i);
eb164_pci_intr = alpha_shared_intr_alloc(EB164_MAX_IRQ);
for (i = 0; i < EB164_MAX_IRQ; i++)
alpha_shared_intr_set_maxstrays(eb164_pci_intr, i,
PCI_STRAY_MAX);
#if NSIO
sio_intr_setup(iot);
eb164_enable_intr(EB164_SIO_IRQ);
#endif
set_iointr(eb164_iointr);
#if 0 /* XXX */
#if NSIO
eb164_enable_intr(KN20AA_PCEB_IRQ);
#if 0 /* XXX init PCEB interrupt handler? */
eb164_attach_intr(&eb164_pci_intrs[KN20AA_PCEB_IRQ], ???, ???, ???);
#endif
#endif
#endif /* 0 XXX */
}
int
@ -103,16 +121,10 @@ dec_eb164_intr_map(ccv, bustag, buspin, line, ihp)
int buspin, line;
pci_intr_handle_t *ihp;
{
printf("dec_eb164_intr_map(0x%lx, %d, %d)\n", bustag, buspin, line);
return 0;
#if 0
struct cia_config *ccp = ccv;
pci_chipset_tag_t pc = &ccp->cc_pc;
int device;
int eb164_irq;
void *ih;
int eb164_irq, pinbase, pinoff;
if (buspin == 0) {
/* No IRQ used. */
@ -123,55 +135,64 @@ dec_eb164_intr_map(ccv, bustag, buspin, line, ihp)
return 1;
}
/*
* Slot->interrupt translation. Appears to work, though it
* may not hold up forever.
*
* The DEC engineers who did this hardware obviously engaged
* in random drug testing.
*/
pci_decompose_tag(pc, bustag, NULL, &device, NULL);
switch (device) {
case 11:
case 12:
eb164_irq = ((device - 11) + 0) * 4;
#if 0 /* THIS CODE SHOULD NEVER BE CALLED FOR THE SIO */
case 8: /* SIO */
eb164_irq = 4;
break;
case 7:
eb164_irq = 8;
break;
case 9:
eb164_irq = 12;
break;
case 6: /* 21040 on AlphaStation 500 */
eb164_irq = 13;
break;
case 8:
eb164_irq = 16;
break;
default:
#ifdef KN20AA_BOGUS_IRQ_FROB
*ihp = 0xdeadbeef;
printf("\n\n BOGUS INTERRUPT MAPPING: dev %d, pin %d\n",
device, buspin);
return (0);
#endif
case 11:
eb164_irq = 5; /* IDE */
break;
case 6:
case 7:
case 8:
case 9:
switch (buspin) {
case 1:
pinbase = 0;
break;
case 2:
case 3:
case 4:
pinbase = (buspin * 4) - 1;
break;
#ifdef DIAGNOSTIC
default:
panic("dec_eb164_intr_map: slot buspin switch");
#endif
};
switch (device) {
case 5:
pinoff = 2;
break;
case 6:
case 7:
case 9:
pinoff = device - 6;
break;
#ifdef DIAGNOSTIC
default:
panic("dec_eb164_intr_map: slot device switch");
#endif
}
eb164_irq = pinoff + pinbase;
break;
default:
panic("pci_eb164_map_int: invalid device number %d\n",
device);
}
eb164_irq += buspin - 1;
if (eb164_irq > KN20AA_MAX_IRQ)
if (eb164_irq > EB164_MAX_IRQ)
panic("pci_eb164_map_int: eb164_irq too large (%d)\n",
eb164_irq);
*ihp = eb164_irq;
return (0);
#endif
}
const char *
@ -184,23 +205,10 @@ dec_eb164_intr_string(ccv, ih)
#endif
static char irqstr[15]; /* 11 + 2 + NULL + sanity */
sprintf(irqstr, "BOGUS");
return (irqstr);
#if 0 /* XXX */
#ifdef KN20AA_BOGUS_IRQ_FROB
if (ih == 0xdeadbeef) {
sprintf(irqstr, "BOGUS");
return (irqstr);
}
#endif
if (ih > KN20AA_MAX_IRQ)
panic("dec_eb164_a50_intr_string: bogus eb164 IRQ 0x%x\n",
ih);
if (ih > EB164_MAX_IRQ)
panic("dec_eb164_intr_string: bogus eb164 IRQ 0x%x\n", ih);
sprintf(irqstr, "eb164 irq %d", ih);
return (irqstr);
#endif /* 0 XXX */
}
void *
@ -210,44 +218,29 @@ dec_eb164_intr_establish(ccv, ih, level, func, arg)
int level;
int (*func) __P((void *));
{
printf("dec_eb164_intr_establish(0x%lx, %d, %p, %p)\n", ih, level, func, arg);
return ((void *)0xbabefacedeadbeef);
#if 0 /* XXX */
#if 0
struct cia_config *ccp = ccv;
#endif
void *cookie;
#ifdef KN20AA_BOGUS_IRQ_FROB
if (ih == 0xdeadbeef) {
int i;
char chars[10];
if (ih > EB164_MAX_IRQ)
panic("dec_eb164_intr_establish: bogus eb164 IRQ 0x%x\n", ih);
printf("dec_eb164_intr_establish: BOGUS IRQ\n");
do {
printf("IRQ to enable? ");
getstr(chars, 10);
i = atoi(chars);
} while (i < 0 || i > 32);
printf("ENABLING IRQ %d\n", i);
eb164_enable_intr(i);
return ((void *)0xbabefacedeadbeef);
}
#endif
if (ih > KN20AA_MAX_IRQ)
panic("dec_eb164_intr_establish: bogus eb164 IRQ 0x%x\n",
ih);
cookie = alpha_shared_intr_establish(eb164_pci_intr, ih, IST_LEVEL,
level, func, arg, "eb164 irq");
cookie = eb164_attach_intr(&eb164_pci_intrs[ih], level, func, arg);
if (cookie != NULL && alpha_shared_intr_isactive(eb164_pci_intr, ih))
eb164_enable_intr(ih);
return (cookie);
#endif /* XXX */
}
void
dec_eb164_intr_disestablish(ccv, cookie)
void *ccv, *cookie;
{
#if 0
struct cia_config *ccp = ccv;
#endif
panic("dec_eb164_intr_disestablish not implemented"); /* XXX */
}
@ -257,6 +250,67 @@ eb164_iointr(framep, vec)
void *framep;
unsigned long vec;
{
int irq;
if (vec >= 0x900) {
if (vec >= 0x900 + (EB164_MAX_IRQ << 4))
panic("eb164_iointr: vec 0x%x out of range\n", vec);
irq = (vec - 0x900) >> 4;
#ifdef EVCNT_COUNTERS
eb164_intr_evcnt.ev_count++;
#else
if (EB164_MAX_IRQ != INTRCNT_EB164_IRQ_LEN)
panic("eb164 interrupt counter sizes inconsistent");
intrcnt[INTRCNT_EB164_IRQ + irq]++;
#endif
if (!alpha_shared_intr_dispatch(eb164_pci_intr, irq)) {
alpha_shared_intr_stray(eb164_pci_intr, irq,
"eb164 irq");
if (eb164_pci_intr[irq].intr_nstrays ==
eb164_pci_intr[irq].intr_maxstrays)
eb164_disable_intr(irq);
}
return;
}
#if NSIO
if (vec >= 0x800) {
sio_iointr(framep, vec);
return;
}
#endif
panic("eb164_iointr: weird vec 0x%x\n", vec);
}
u_int8_t eb164_intr_mask[3] = { 0xff, 0xff, 0xff };
void
eb164_enable_intr(irq)
int irq;
{
int byte = (irq / 8), bit = (irq % 8);
#if 1
printf("eb164_enable_intr: enabling %d (%d:%d)\n", irq, byte, bit);
#endif
eb164_intr_mask[byte] &= ~(1 << bit);
bus_space_write_1(eb164_intrgate_iot, eb164_intrgate_ioh, byte,
eb164_intr_mask[byte]);
}
void
eb164_disable_intr(irq)
int irq;
{
int byte = (irq / 8), bit = (irq % 8);
#if 1
printf("eb164_disable_intr: disabling %d (%d:%d)\n", irq, byte, bit);
#endif
eb164_intr_mask[byte] |= (1 << bit);
bus_space_write_1(eb164_intrgate_iot, eb164_intrgate_ioh, byte,
eb164_intr_mask[byte]);
}