2 * linux/arch/alpha/kernel/sys_dp264.c
4 * Copyright (C) 1995 David A Rusling
5 * Copyright (C) 1996, 1999 Jay A Estabrook
6 * Copyright (C) 1998, 1999 Richard Henderson
8 * Modified by Christopher C. Chimelis, 2001 to
9 * add support for the addition of Shark to the
12 * Code supporting the DP264 (EV6+TSUNAMI).
15 #include <linux/kernel.h>
16 #include <linux/types.h>
18 #include <linux/sched.h>
19 #include <linux/pci.h>
20 #include <linux/init.h>
21 #include <linux/bitops.h>
23 #include <asm/ptrace.h>
24 #include <asm/system.h>
27 #include <asm/mmu_context.h>
29 #include <asm/pgtable.h>
30 #include <asm/core_tsunami.h>
31 #include <asm/hwrpb.h>
32 #include <asm/tlbflush.h>
37 #include "machvec_impl.h"
40 /* Note mask bit is true for ENABLED irqs. */
41 static unsigned long cached_irq_mask
;
42 /* dp264 boards handle at max four CPUs */
43 static unsigned long cpu_irq_affinity
[4] = { 0UL, 0UL, 0UL, 0UL };
45 DEFINE_SPINLOCK(dp264_irq_lock
);
48 tsunami_update_irq_hw(unsigned long mask
)
50 register tsunami_cchip
*cchip
= TSUNAMI_cchip
;
51 unsigned long isa_enable
= 1UL << 55;
52 register int bcpu
= boot_cpuid
;
55 volatile unsigned long *dim0
, *dim1
, *dim2
, *dim3
;
56 unsigned long mask0
, mask1
, mask2
, mask3
, dummy
;
59 mask0
= mask
& cpu_irq_affinity
[0];
60 mask1
= mask
& cpu_irq_affinity
[1];
61 mask2
= mask
& cpu_irq_affinity
[2];
62 mask3
= mask
& cpu_irq_affinity
[3];
64 if (bcpu
== 0) mask0
|= isa_enable
;
65 else if (bcpu
== 1) mask1
|= isa_enable
;
66 else if (bcpu
== 2) mask2
|= isa_enable
;
67 else mask3
|= isa_enable
;
69 dim0
= &cchip
->dim0
.csr
;
70 dim1
= &cchip
->dim1
.csr
;
71 dim2
= &cchip
->dim2
.csr
;
72 dim3
= &cchip
->dim3
.csr
;
73 if (!cpu_possible(0)) dim0
= &dummy
;
74 if (!cpu_possible(1)) dim1
= &dummy
;
75 if (!cpu_possible(2)) dim2
= &dummy
;
76 if (!cpu_possible(3)) dim3
= &dummy
;
88 volatile unsigned long *dimB
;
89 if (bcpu
== 0) dimB
= &cchip
->dim0
.csr
;
90 else if (bcpu
== 1) dimB
= &cchip
->dim1
.csr
;
91 else if (bcpu
== 2) dimB
= &cchip
->dim2
.csr
;
92 else dimB
= &cchip
->dim3
.csr
;
94 *dimB
= mask
| isa_enable
;
101 dp264_enable_irq(unsigned int irq
)
103 spin_lock(&dp264_irq_lock
);
104 cached_irq_mask
|= 1UL << irq
;
105 tsunami_update_irq_hw(cached_irq_mask
);
106 spin_unlock(&dp264_irq_lock
);
110 dp264_disable_irq(unsigned int irq
)
112 spin_lock(&dp264_irq_lock
);
113 cached_irq_mask
&= ~(1UL << irq
);
114 tsunami_update_irq_hw(cached_irq_mask
);
115 spin_unlock(&dp264_irq_lock
);
119 dp264_startup_irq(unsigned int irq
)
121 dp264_enable_irq(irq
);
122 return 0; /* never anything pending */
126 dp264_end_irq(unsigned int irq
)
128 if (!(irq_desc
[irq
].status
& (IRQ_DISABLED
|IRQ_INPROGRESS
)))
129 dp264_enable_irq(irq
);
133 clipper_enable_irq(unsigned int irq
)
135 spin_lock(&dp264_irq_lock
);
136 cached_irq_mask
|= 1UL << (irq
- 16);
137 tsunami_update_irq_hw(cached_irq_mask
);
138 spin_unlock(&dp264_irq_lock
);
142 clipper_disable_irq(unsigned int irq
)
144 spin_lock(&dp264_irq_lock
);
145 cached_irq_mask
&= ~(1UL << (irq
- 16));
146 tsunami_update_irq_hw(cached_irq_mask
);
147 spin_unlock(&dp264_irq_lock
);
151 clipper_startup_irq(unsigned int irq
)
153 clipper_enable_irq(irq
);
154 return 0; /* never anything pending */
158 clipper_end_irq(unsigned int irq
)
160 if (!(irq_desc
[irq
].status
& (IRQ_DISABLED
|IRQ_INPROGRESS
)))
161 clipper_enable_irq(irq
);
165 cpu_set_irq_affinity(unsigned int irq
, cpumask_t affinity
)
169 for (cpu
= 0; cpu
< 4; cpu
++) {
170 unsigned long aff
= cpu_irq_affinity
[cpu
];
171 if (cpu_isset(cpu
, affinity
))
174 aff
&= ~(1UL << irq
);
175 cpu_irq_affinity
[cpu
] = aff
;
180 dp264_set_affinity(unsigned int irq
, const struct cpumask
*affinity
)
182 spin_lock(&dp264_irq_lock
);
183 cpu_set_irq_affinity(irq
, *affinity
);
184 tsunami_update_irq_hw(cached_irq_mask
);
185 spin_unlock(&dp264_irq_lock
);
191 clipper_set_affinity(unsigned int irq
, const struct cpumask
*affinity
)
193 spin_lock(&dp264_irq_lock
);
194 cpu_set_irq_affinity(irq
- 16, *affinity
);
195 tsunami_update_irq_hw(cached_irq_mask
);
196 spin_unlock(&dp264_irq_lock
);
201 static struct irq_chip dp264_irq_type
= {
203 .startup
= dp264_startup_irq
,
204 .shutdown
= dp264_disable_irq
,
205 .enable
= dp264_enable_irq
,
206 .disable
= dp264_disable_irq
,
207 .ack
= dp264_disable_irq
,
208 .end
= dp264_end_irq
,
209 .set_affinity
= dp264_set_affinity
,
212 static struct irq_chip clipper_irq_type
= {
213 .typename
= "CLIPPER",
214 .startup
= clipper_startup_irq
,
215 .shutdown
= clipper_disable_irq
,
216 .enable
= clipper_enable_irq
,
217 .disable
= clipper_disable_irq
,
218 .ack
= clipper_disable_irq
,
219 .end
= clipper_end_irq
,
220 .set_affinity
= clipper_set_affinity
,
224 dp264_device_interrupt(unsigned long vector
)
227 printk("dp264_device_interrupt: NOT IMPLEMENTED YET!! \n");
232 /* Read the interrupt summary register of TSUNAMI */
233 pld
= TSUNAMI_cchip
->dir0
.csr
;
236 * Now for every possible bit set, work through them and call
237 * the appropriate interrupt handler.
241 pld
&= pld
- 1; /* clear least bit set */
243 isa_device_interrupt(vector
);
247 TSUNAMI_cchip
->dir0
.csr
= 1UL << i
; mb();
248 tmp
= TSUNAMI_cchip
->dir0
.csr
;
255 dp264_srm_device_interrupt(unsigned long vector
)
259 irq
= (vector
- 0x800) >> 4;
262 * The SRM console reports PCI interrupts with a vector calculated by:
264 * 0x900 + (0x10 * DRIR-bit)
266 * So bit 16 shows up as IRQ 32, etc.
268 * On DP264/BRICK/MONET, we adjust it down by 16 because at least
269 * that many of the low order bits of the DRIR are not used, and
270 * so we don't count them.
279 clipper_srm_device_interrupt(unsigned long vector
)
283 irq
= (vector
- 0x800) >> 4;
286 * The SRM console reports PCI interrupts with a vector calculated by:
288 * 0x900 + (0x10 * DRIR-bit)
290 * So bit 16 shows up as IRQ 32, etc.
292 * CLIPPER uses bits 8-47 for PCI interrupts, so we do not need
293 * to scale down the vector reported, we just use it.
295 * Eg IRQ 24 is DRIR bit 8, etc, etc
301 init_tsunami_irqs(struct irq_chip
* ops
, int imin
, int imax
)
304 for (i
= imin
; i
<= imax
; ++i
) {
305 irq_desc
[i
].status
= IRQ_DISABLED
| IRQ_LEVEL
;
306 irq_desc
[i
].chip
= ops
;
313 outb(0, DMA1_RESET_REG
);
314 outb(0, DMA2_RESET_REG
);
315 outb(DMA_MODE_CASCADE
, DMA2_MODE_REG
);
316 outb(0, DMA2_MASK_REG
);
319 alpha_mv
.device_interrupt
= dp264_srm_device_interrupt
;
321 tsunami_update_irq_hw(0);
324 init_tsunami_irqs(&dp264_irq_type
, 16, 47);
328 clipper_init_irq(void)
330 outb(0, DMA1_RESET_REG
);
331 outb(0, DMA2_RESET_REG
);
332 outb(DMA_MODE_CASCADE
, DMA2_MODE_REG
);
333 outb(0, DMA2_MASK_REG
);
336 alpha_mv
.device_interrupt
= clipper_srm_device_interrupt
;
338 tsunami_update_irq_hw(0);
341 init_tsunami_irqs(&clipper_irq_type
, 24, 63);
346 * PCI Fixup configuration.
348 * Summary @ TSUNAMI_CSR_DIM0:
351 *18 Interrupt SCSI B (Adaptec 7895 builtin)
352 *19 Interrupt SCSI A (Adaptec 7895 builtin)
353 *20 Interrupt Line D from slot 2 PCI0
354 *21 Interrupt Line C from slot 2 PCI0
355 *22 Interrupt Line B from slot 2 PCI0
356 *23 Interrupt Line A from slot 2 PCI0
357 *24 Interrupt Line D from slot 1 PCI0
358 *25 Interrupt Line C from slot 1 PCI0
359 *26 Interrupt Line B from slot 1 PCI0
360 *27 Interrupt Line A from slot 1 PCI0
361 *28 Interrupt Line D from slot 0 PCI0
362 *29 Interrupt Line C from slot 0 PCI0
363 *30 Interrupt Line B from slot 0 PCI0
364 *31 Interrupt Line A from slot 0 PCI0
366 *32 Interrupt Line D from slot 3 PCI1
367 *33 Interrupt Line C from slot 3 PCI1
368 *34 Interrupt Line B from slot 3 PCI1
369 *35 Interrupt Line A from slot 3 PCI1
370 *36 Interrupt Line D from slot 2 PCI1
371 *37 Interrupt Line C from slot 2 PCI1
372 *38 Interrupt Line B from slot 2 PCI1
373 *39 Interrupt Line A from slot 2 PCI1
374 *40 Interrupt Line D from slot 1 PCI1
375 *41 Interrupt Line C from slot 1 PCI1
376 *42 Interrupt Line B from slot 1 PCI1
377 *43 Interrupt Line A from slot 1 PCI1
378 *44 Interrupt Line D from slot 0 PCI1
379 *45 Interrupt Line C from slot 0 PCI1
380 *46 Interrupt Line B from slot 0 PCI1
381 *47 Interrupt Line A from slot 0 PCI1
383 *53 PCI0 NMI (from Cypress)
384 *54 PCI0 SMI INT (from Cypress)
385 *55 PCI0 ISA Interrupt (from Cypress)
392 * 5 Cypress Bridge I/O
393 * 6 SCSI Adaptec builtin
394 * 7 64 bit PCI option slot 0 (all busses)
395 * 8 64 bit PCI option slot 1 (all busses)
396 * 9 64 bit PCI option slot 2 (all busses)
397 * 10 64 bit PCI option slot 3 (not bus 0)
401 isa_irq_fixup(struct pci_dev
*dev
, int irq
)
408 /* This interrupt is routed via ISA bridge, so we'll
409 just have to trust whatever value the console might
411 pci_read_config_byte(dev
, PCI_INTERRUPT_LINE
, &irq8
);
417 dp264_map_irq(struct pci_dev
*dev
, u8 slot
, u8 pin
)
419 static char irq_tab
[6][5] __initdata
= {
420 /*INT INTA INTB INTC INTD */
421 { -1, -1, -1, -1, -1}, /* IdSel 5 ISA Bridge */
422 { 16+ 3, 16+ 3, 16+ 2, 16+ 2, 16+ 2}, /* IdSel 6 SCSI builtin*/
423 { 16+15, 16+15, 16+14, 16+13, 16+12}, /* IdSel 7 slot 0 */
424 { 16+11, 16+11, 16+10, 16+ 9, 16+ 8}, /* IdSel 8 slot 1 */
425 { 16+ 7, 16+ 7, 16+ 6, 16+ 5, 16+ 4}, /* IdSel 9 slot 2 */
426 { 16+ 3, 16+ 3, 16+ 2, 16+ 1, 16+ 0} /* IdSel 10 slot 3 */
428 const long min_idsel
= 5, max_idsel
= 10, irqs_per_slot
= 5;
429 struct pci_controller
*hose
= dev
->sysdata
;
430 int irq
= COMMON_TABLE_LOOKUP
;
433 irq
+= 16 * hose
->index
;
435 return isa_irq_fixup(dev
, irq
);
439 monet_map_irq(struct pci_dev
*dev
, u8 slot
, u8 pin
)
441 static char irq_tab
[13][5] __initdata
= {
442 /*INT INTA INTB INTC INTD */
443 { 45, 45, 45, 45, 45}, /* IdSel 3 21143 PCI1 */
444 { -1, -1, -1, -1, -1}, /* IdSel 4 unused */
445 { -1, -1, -1, -1, -1}, /* IdSel 5 unused */
446 { 47, 47, 47, 47, 47}, /* IdSel 6 SCSI PCI1 */
447 { -1, -1, -1, -1, -1}, /* IdSel 7 ISA Bridge */
448 { -1, -1, -1, -1, -1}, /* IdSel 8 P2P PCI1 */
450 { 28, 28, 29, 30, 31}, /* IdSel 14 slot 4 PCI2*/
451 { 24, 24, 25, 26, 27}, /* IdSel 15 slot 5 PCI2*/
453 { -1, -1, -1, -1, -1}, /* IdSel 9 unused */
454 { -1, -1, -1, -1, -1}, /* IdSel 10 unused */
456 { 40, 40, 41, 42, 43}, /* IdSel 11 slot 1 PCI0*/
457 { 36, 36, 37, 38, 39}, /* IdSel 12 slot 2 PCI0*/
458 { 32, 32, 33, 34, 35}, /* IdSel 13 slot 3 PCI0*/
459 { 28, 28, 29, 30, 31}, /* IdSel 14 slot 4 PCI2*/
460 { 24, 24, 25, 26, 27} /* IdSel 15 slot 5 PCI2*/
462 const long min_idsel
= 3, max_idsel
= 15, irqs_per_slot
= 5;
464 return isa_irq_fixup(dev
, COMMON_TABLE_LOOKUP
);
468 monet_swizzle(struct pci_dev
*dev
, u8
*pinp
)
470 struct pci_controller
*hose
= dev
->sysdata
;
471 int slot
, pin
= *pinp
;
473 if (!dev
->bus
->parent
) {
474 slot
= PCI_SLOT(dev
->devfn
);
476 /* Check for the built-in bridge on hose 1. */
477 else if (hose
->index
== 1 && PCI_SLOT(dev
->bus
->self
->devfn
) == 8) {
478 slot
= PCI_SLOT(dev
->devfn
);
480 /* Must be a card-based bridge. */
482 /* Check for built-in bridge on hose 1. */
483 if (hose
->index
== 1 &&
484 PCI_SLOT(dev
->bus
->self
->devfn
) == 8) {
485 slot
= PCI_SLOT(dev
->devfn
);
488 pin
= pci_swizzle_interrupt_pin(dev
, pin
);
490 /* Move up the chain of bridges. */
491 dev
= dev
->bus
->self
;
492 /* Slot of the next bridge. */
493 slot
= PCI_SLOT(dev
->devfn
);
494 } while (dev
->bus
->self
);
501 webbrick_map_irq(struct pci_dev
*dev
, u8 slot
, u8 pin
)
503 static char irq_tab
[13][5] __initdata
= {
504 /*INT INTA INTB INTC INTD */
505 { -1, -1, -1, -1, -1}, /* IdSel 7 ISA Bridge */
506 { -1, -1, -1, -1, -1}, /* IdSel 8 unused */
507 { 29, 29, 29, 29, 29}, /* IdSel 9 21143 #1 */
508 { -1, -1, -1, -1, -1}, /* IdSel 10 unused */
509 { 30, 30, 30, 30, 30}, /* IdSel 11 21143 #2 */
510 { -1, -1, -1, -1, -1}, /* IdSel 12 unused */
511 { -1, -1, -1, -1, -1}, /* IdSel 13 unused */
512 { 35, 35, 34, 33, 32}, /* IdSel 14 slot 0 */
513 { 39, 39, 38, 37, 36}, /* IdSel 15 slot 1 */
514 { 43, 43, 42, 41, 40}, /* IdSel 16 slot 2 */
515 { 47, 47, 46, 45, 44}, /* IdSel 17 slot 3 */
517 const long min_idsel
= 7, max_idsel
= 17, irqs_per_slot
= 5;
519 return isa_irq_fixup(dev
, COMMON_TABLE_LOOKUP
);
523 clipper_map_irq(struct pci_dev
*dev
, u8 slot
, u8 pin
)
525 static char irq_tab
[7][5] __initdata
= {
526 /*INT INTA INTB INTC INTD */
527 { 16+ 8, 16+ 8, 16+ 9, 16+10, 16+11}, /* IdSel 1 slot 1 */
528 { 16+12, 16+12, 16+13, 16+14, 16+15}, /* IdSel 2 slot 2 */
529 { 16+16, 16+16, 16+17, 16+18, 16+19}, /* IdSel 3 slot 3 */
530 { 16+20, 16+20, 16+21, 16+22, 16+23}, /* IdSel 4 slot 4 */
531 { 16+24, 16+24, 16+25, 16+26, 16+27}, /* IdSel 5 slot 5 */
532 { 16+28, 16+28, 16+29, 16+30, 16+31}, /* IdSel 6 slot 6 */
533 { -1, -1, -1, -1, -1} /* IdSel 7 ISA Bridge */
535 const long min_idsel
= 1, max_idsel
= 7, irqs_per_slot
= 5;
536 struct pci_controller
*hose
= dev
->sysdata
;
537 int irq
= COMMON_TABLE_LOOKUP
;
540 irq
+= 16 * hose
->index
;
542 return isa_irq_fixup(dev
, irq
);
550 locate_and_init_vga(NULL
);
559 locate_and_init_vga(NULL
);
563 clipper_init_pci(void)
566 locate_and_init_vga(NULL
);
570 webbrick_init_arch(void)
574 /* Tsunami caches 4 PTEs at a time; DS10 has only 1 hose. */
575 hose_head
->sg_isa
->align_entry
= 4;
576 hose_head
->sg_pci
->align_entry
= 4;
584 struct alpha_machine_vector dp264_mv __initmv
= {
585 .vector_name
= "DP264",
589 .machine_check
= tsunami_machine_check
,
590 .max_isa_dma_address
= ALPHA_MAX_ISA_DMA_ADDRESS
,
591 .min_io_address
= DEFAULT_IO_BASE
,
592 .min_mem_address
= DEFAULT_MEM_BASE
,
593 .pci_dac_offset
= TSUNAMI_DAC_OFFSET
,
596 .device_interrupt
= dp264_device_interrupt
,
598 .init_arch
= tsunami_init_arch
,
599 .init_irq
= dp264_init_irq
,
600 .init_rtc
= common_init_rtc
,
601 .init_pci
= dp264_init_pci
,
602 .kill_arch
= tsunami_kill_arch
,
603 .pci_map_irq
= dp264_map_irq
,
604 .pci_swizzle
= common_swizzle
,
608 struct alpha_machine_vector monet_mv __initmv
= {
609 .vector_name
= "Monet",
613 .machine_check
= tsunami_machine_check
,
614 .max_isa_dma_address
= ALPHA_MAX_ISA_DMA_ADDRESS
,
615 .min_io_address
= DEFAULT_IO_BASE
,
616 .min_mem_address
= DEFAULT_MEM_BASE
,
617 .pci_dac_offset
= TSUNAMI_DAC_OFFSET
,
620 .device_interrupt
= dp264_device_interrupt
,
622 .init_arch
= tsunami_init_arch
,
623 .init_irq
= dp264_init_irq
,
624 .init_rtc
= common_init_rtc
,
625 .init_pci
= monet_init_pci
,
626 .kill_arch
= tsunami_kill_arch
,
627 .pci_map_irq
= monet_map_irq
,
628 .pci_swizzle
= monet_swizzle
,
631 struct alpha_machine_vector webbrick_mv __initmv
= {
632 .vector_name
= "Webbrick",
636 .machine_check
= tsunami_machine_check
,
637 .max_isa_dma_address
= ALPHA_MAX_ISA_DMA_ADDRESS
,
638 .min_io_address
= DEFAULT_IO_BASE
,
639 .min_mem_address
= DEFAULT_MEM_BASE
,
640 .pci_dac_offset
= TSUNAMI_DAC_OFFSET
,
643 .device_interrupt
= dp264_device_interrupt
,
645 .init_arch
= webbrick_init_arch
,
646 .init_irq
= dp264_init_irq
,
647 .init_rtc
= common_init_rtc
,
648 .init_pci
= common_init_pci
,
649 .kill_arch
= tsunami_kill_arch
,
650 .pci_map_irq
= webbrick_map_irq
,
651 .pci_swizzle
= common_swizzle
,
654 struct alpha_machine_vector clipper_mv __initmv
= {
655 .vector_name
= "Clipper",
659 .machine_check
= tsunami_machine_check
,
660 .max_isa_dma_address
= ALPHA_MAX_ISA_DMA_ADDRESS
,
661 .min_io_address
= DEFAULT_IO_BASE
,
662 .min_mem_address
= DEFAULT_MEM_BASE
,
663 .pci_dac_offset
= TSUNAMI_DAC_OFFSET
,
666 .device_interrupt
= dp264_device_interrupt
,
668 .init_arch
= tsunami_init_arch
,
669 .init_irq
= clipper_init_irq
,
670 .init_rtc
= common_init_rtc
,
671 .init_pci
= clipper_init_pci
,
672 .kill_arch
= tsunami_kill_arch
,
673 .pci_map_irq
= clipper_map_irq
,
674 .pci_swizzle
= common_swizzle
,
677 /* Sharks strongly resemble Clipper, at least as far
678 * as interrupt routing, etc, so we're using the
679 * same functions as Clipper does
682 struct alpha_machine_vector shark_mv __initmv
= {
683 .vector_name
= "Shark",
687 .machine_check
= tsunami_machine_check
,
688 .max_isa_dma_address
= ALPHA_MAX_ISA_DMA_ADDRESS
,
689 .min_io_address
= DEFAULT_IO_BASE
,
690 .min_mem_address
= DEFAULT_MEM_BASE
,
691 .pci_dac_offset
= TSUNAMI_DAC_OFFSET
,
694 .device_interrupt
= dp264_device_interrupt
,
696 .init_arch
= tsunami_init_arch
,
697 .init_irq
= clipper_init_irq
,
698 .init_rtc
= common_init_rtc
,
699 .init_pci
= common_init_pci
,
700 .kill_arch
= tsunami_kill_arch
,
701 .pci_map_irq
= clipper_map_irq
,
702 .pci_swizzle
= common_swizzle
,
705 /* No alpha_mv alias for webbrick/monet/clipper, since we compile them
706 in unconditionally with DP264; setup_arch knows how to cope. */