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>
26 #include <asm/mmu_context.h>
28 #include <asm/pgtable.h>
29 #include <asm/core_tsunami.h>
30 #include <asm/hwrpb.h>
31 #include <asm/tlbflush.h>
36 #include "machvec_impl.h"
39 /* Note mask bit is true for ENABLED irqs. */
40 static unsigned long cached_irq_mask
;
41 /* dp264 boards handle at max four CPUs */
42 static unsigned long cpu_irq_affinity
[4] = { 0UL, 0UL, 0UL, 0UL };
44 DEFINE_SPINLOCK(dp264_irq_lock
);
47 tsunami_update_irq_hw(unsigned long mask
)
49 register tsunami_cchip
*cchip
= TSUNAMI_cchip
;
50 unsigned long isa_enable
= 1UL << 55;
51 register int bcpu
= boot_cpuid
;
54 volatile unsigned long *dim0
, *dim1
, *dim2
, *dim3
;
55 unsigned long mask0
, mask1
, mask2
, mask3
, dummy
;
58 mask0
= mask
& cpu_irq_affinity
[0];
59 mask1
= mask
& cpu_irq_affinity
[1];
60 mask2
= mask
& cpu_irq_affinity
[2];
61 mask3
= mask
& cpu_irq_affinity
[3];
63 if (bcpu
== 0) mask0
|= isa_enable
;
64 else if (bcpu
== 1) mask1
|= isa_enable
;
65 else if (bcpu
== 2) mask2
|= isa_enable
;
66 else mask3
|= isa_enable
;
68 dim0
= &cchip
->dim0
.csr
;
69 dim1
= &cchip
->dim1
.csr
;
70 dim2
= &cchip
->dim2
.csr
;
71 dim3
= &cchip
->dim3
.csr
;
72 if (!cpu_possible(0)) dim0
= &dummy
;
73 if (!cpu_possible(1)) dim1
= &dummy
;
74 if (!cpu_possible(2)) dim2
= &dummy
;
75 if (!cpu_possible(3)) dim3
= &dummy
;
87 volatile unsigned long *dimB
;
88 if (bcpu
== 0) dimB
= &cchip
->dim0
.csr
;
89 else if (bcpu
== 1) dimB
= &cchip
->dim1
.csr
;
90 else if (bcpu
== 2) dimB
= &cchip
->dim2
.csr
;
91 else dimB
= &cchip
->dim3
.csr
;
93 *dimB
= mask
| isa_enable
;
100 dp264_enable_irq(struct irq_data
*d
)
102 spin_lock(&dp264_irq_lock
);
103 cached_irq_mask
|= 1UL << d
->irq
;
104 tsunami_update_irq_hw(cached_irq_mask
);
105 spin_unlock(&dp264_irq_lock
);
109 dp264_disable_irq(struct irq_data
*d
)
111 spin_lock(&dp264_irq_lock
);
112 cached_irq_mask
&= ~(1UL << d
->irq
);
113 tsunami_update_irq_hw(cached_irq_mask
);
114 spin_unlock(&dp264_irq_lock
);
118 clipper_enable_irq(struct irq_data
*d
)
120 spin_lock(&dp264_irq_lock
);
121 cached_irq_mask
|= 1UL << (d
->irq
- 16);
122 tsunami_update_irq_hw(cached_irq_mask
);
123 spin_unlock(&dp264_irq_lock
);
127 clipper_disable_irq(struct irq_data
*d
)
129 spin_lock(&dp264_irq_lock
);
130 cached_irq_mask
&= ~(1UL << (d
->irq
- 16));
131 tsunami_update_irq_hw(cached_irq_mask
);
132 spin_unlock(&dp264_irq_lock
);
136 cpu_set_irq_affinity(unsigned int irq
, cpumask_t affinity
)
140 for (cpu
= 0; cpu
< 4; cpu
++) {
141 unsigned long aff
= cpu_irq_affinity
[cpu
];
142 if (cpumask_test_cpu(cpu
, &affinity
))
145 aff
&= ~(1UL << irq
);
146 cpu_irq_affinity
[cpu
] = aff
;
151 dp264_set_affinity(struct irq_data
*d
, const struct cpumask
*affinity
,
154 spin_lock(&dp264_irq_lock
);
155 cpu_set_irq_affinity(d
->irq
, *affinity
);
156 tsunami_update_irq_hw(cached_irq_mask
);
157 spin_unlock(&dp264_irq_lock
);
163 clipper_set_affinity(struct irq_data
*d
, const struct cpumask
*affinity
,
166 spin_lock(&dp264_irq_lock
);
167 cpu_set_irq_affinity(d
->irq
- 16, *affinity
);
168 tsunami_update_irq_hw(cached_irq_mask
);
169 spin_unlock(&dp264_irq_lock
);
174 static struct irq_chip dp264_irq_type
= {
176 .irq_unmask
= dp264_enable_irq
,
177 .irq_mask
= dp264_disable_irq
,
178 .irq_mask_ack
= dp264_disable_irq
,
179 .irq_set_affinity
= dp264_set_affinity
,
182 static struct irq_chip clipper_irq_type
= {
184 .irq_unmask
= clipper_enable_irq
,
185 .irq_mask
= clipper_disable_irq
,
186 .irq_mask_ack
= clipper_disable_irq
,
187 .irq_set_affinity
= clipper_set_affinity
,
191 dp264_device_interrupt(unsigned long vector
)
196 /* Read the interrupt summary register of TSUNAMI */
197 pld
= TSUNAMI_cchip
->dir0
.csr
;
200 * Now for every possible bit set, work through them and call
201 * the appropriate interrupt handler.
205 pld
&= pld
- 1; /* clear least bit set */
207 isa_device_interrupt(vector
);
214 dp264_srm_device_interrupt(unsigned long vector
)
218 irq
= (vector
- 0x800) >> 4;
221 * The SRM console reports PCI interrupts with a vector calculated by:
223 * 0x900 + (0x10 * DRIR-bit)
225 * So bit 16 shows up as IRQ 32, etc.
227 * On DP264/BRICK/MONET, we adjust it down by 16 because at least
228 * that many of the low order bits of the DRIR are not used, and
229 * so we don't count them.
238 clipper_srm_device_interrupt(unsigned long vector
)
242 irq
= (vector
- 0x800) >> 4;
245 * The SRM console reports PCI interrupts with a vector calculated by:
247 * 0x900 + (0x10 * DRIR-bit)
249 * So bit 16 shows up as IRQ 32, etc.
251 * CLIPPER uses bits 8-47 for PCI interrupts, so we do not need
252 * to scale down the vector reported, we just use it.
254 * Eg IRQ 24 is DRIR bit 8, etc, etc
260 init_tsunami_irqs(struct irq_chip
* ops
, int imin
, int imax
)
263 for (i
= imin
; i
<= imax
; ++i
) {
264 irq_set_chip_and_handler(i
, ops
, handle_level_irq
);
265 irq_set_status_flags(i
, IRQ_LEVEL
);
272 outb(0, DMA1_RESET_REG
);
273 outb(0, DMA2_RESET_REG
);
274 outb(DMA_MODE_CASCADE
, DMA2_MODE_REG
);
275 outb(0, DMA2_MASK_REG
);
278 alpha_mv
.device_interrupt
= dp264_srm_device_interrupt
;
280 tsunami_update_irq_hw(0);
283 init_tsunami_irqs(&dp264_irq_type
, 16, 47);
287 clipper_init_irq(void)
289 outb(0, DMA1_RESET_REG
);
290 outb(0, DMA2_RESET_REG
);
291 outb(DMA_MODE_CASCADE
, DMA2_MODE_REG
);
292 outb(0, DMA2_MASK_REG
);
295 alpha_mv
.device_interrupt
= clipper_srm_device_interrupt
;
297 tsunami_update_irq_hw(0);
300 init_tsunami_irqs(&clipper_irq_type
, 24, 63);
305 * PCI Fixup configuration.
307 * Summary @ TSUNAMI_CSR_DIM0:
310 *18 Interrupt SCSI B (Adaptec 7895 builtin)
311 *19 Interrupt SCSI A (Adaptec 7895 builtin)
312 *20 Interrupt Line D from slot 2 PCI0
313 *21 Interrupt Line C from slot 2 PCI0
314 *22 Interrupt Line B from slot 2 PCI0
315 *23 Interrupt Line A from slot 2 PCI0
316 *24 Interrupt Line D from slot 1 PCI0
317 *25 Interrupt Line C from slot 1 PCI0
318 *26 Interrupt Line B from slot 1 PCI0
319 *27 Interrupt Line A from slot 1 PCI0
320 *28 Interrupt Line D from slot 0 PCI0
321 *29 Interrupt Line C from slot 0 PCI0
322 *30 Interrupt Line B from slot 0 PCI0
323 *31 Interrupt Line A from slot 0 PCI0
325 *32 Interrupt Line D from slot 3 PCI1
326 *33 Interrupt Line C from slot 3 PCI1
327 *34 Interrupt Line B from slot 3 PCI1
328 *35 Interrupt Line A from slot 3 PCI1
329 *36 Interrupt Line D from slot 2 PCI1
330 *37 Interrupt Line C from slot 2 PCI1
331 *38 Interrupt Line B from slot 2 PCI1
332 *39 Interrupt Line A from slot 2 PCI1
333 *40 Interrupt Line D from slot 1 PCI1
334 *41 Interrupt Line C from slot 1 PCI1
335 *42 Interrupt Line B from slot 1 PCI1
336 *43 Interrupt Line A from slot 1 PCI1
337 *44 Interrupt Line D from slot 0 PCI1
338 *45 Interrupt Line C from slot 0 PCI1
339 *46 Interrupt Line B from slot 0 PCI1
340 *47 Interrupt Line A from slot 0 PCI1
342 *53 PCI0 NMI (from Cypress)
343 *54 PCI0 SMI INT (from Cypress)
344 *55 PCI0 ISA Interrupt (from Cypress)
351 * 5 Cypress Bridge I/O
352 * 6 SCSI Adaptec builtin
353 * 7 64 bit PCI option slot 0 (all busses)
354 * 8 64 bit PCI option slot 1 (all busses)
355 * 9 64 bit PCI option slot 2 (all busses)
356 * 10 64 bit PCI option slot 3 (not bus 0)
360 isa_irq_fixup(const struct pci_dev
*dev
, int irq
)
367 /* This interrupt is routed via ISA bridge, so we'll
368 just have to trust whatever value the console might
370 pci_read_config_byte(dev
, PCI_INTERRUPT_LINE
, &irq8
);
376 dp264_map_irq(const struct pci_dev
*dev
, u8 slot
, u8 pin
)
378 static char irq_tab
[6][5] __initdata
= {
379 /*INT INTA INTB INTC INTD */
380 { -1, -1, -1, -1, -1}, /* IdSel 5 ISA Bridge */
381 { 16+ 3, 16+ 3, 16+ 2, 16+ 2, 16+ 2}, /* IdSel 6 SCSI builtin*/
382 { 16+15, 16+15, 16+14, 16+13, 16+12}, /* IdSel 7 slot 0 */
383 { 16+11, 16+11, 16+10, 16+ 9, 16+ 8}, /* IdSel 8 slot 1 */
384 { 16+ 7, 16+ 7, 16+ 6, 16+ 5, 16+ 4}, /* IdSel 9 slot 2 */
385 { 16+ 3, 16+ 3, 16+ 2, 16+ 1, 16+ 0} /* IdSel 10 slot 3 */
387 const long min_idsel
= 5, max_idsel
= 10, irqs_per_slot
= 5;
388 struct pci_controller
*hose
= dev
->sysdata
;
389 int irq
= COMMON_TABLE_LOOKUP
;
392 irq
+= 16 * hose
->index
;
394 return isa_irq_fixup(dev
, irq
);
398 monet_map_irq(const struct pci_dev
*dev
, u8 slot
, u8 pin
)
400 static char irq_tab
[13][5] __initdata
= {
401 /*INT INTA INTB INTC INTD */
402 { 45, 45, 45, 45, 45}, /* IdSel 3 21143 PCI1 */
403 { -1, -1, -1, -1, -1}, /* IdSel 4 unused */
404 { -1, -1, -1, -1, -1}, /* IdSel 5 unused */
405 { 47, 47, 47, 47, 47}, /* IdSel 6 SCSI PCI1 */
406 { -1, -1, -1, -1, -1}, /* IdSel 7 ISA Bridge */
407 { -1, -1, -1, -1, -1}, /* IdSel 8 P2P PCI1 */
409 { 28, 28, 29, 30, 31}, /* IdSel 14 slot 4 PCI2*/
410 { 24, 24, 25, 26, 27}, /* IdSel 15 slot 5 PCI2*/
412 { -1, -1, -1, -1, -1}, /* IdSel 9 unused */
413 { -1, -1, -1, -1, -1}, /* IdSel 10 unused */
415 { 40, 40, 41, 42, 43}, /* IdSel 11 slot 1 PCI0*/
416 { 36, 36, 37, 38, 39}, /* IdSel 12 slot 2 PCI0*/
417 { 32, 32, 33, 34, 35}, /* IdSel 13 slot 3 PCI0*/
418 { 28, 28, 29, 30, 31}, /* IdSel 14 slot 4 PCI2*/
419 { 24, 24, 25, 26, 27} /* IdSel 15 slot 5 PCI2*/
421 const long min_idsel
= 3, max_idsel
= 15, irqs_per_slot
= 5;
423 return isa_irq_fixup(dev
, COMMON_TABLE_LOOKUP
);
427 monet_swizzle(struct pci_dev
*dev
, u8
*pinp
)
429 struct pci_controller
*hose
= dev
->sysdata
;
430 int slot
, pin
= *pinp
;
432 if (!dev
->bus
->parent
) {
433 slot
= PCI_SLOT(dev
->devfn
);
435 /* Check for the built-in bridge on hose 1. */
436 else if (hose
->index
== 1 && PCI_SLOT(dev
->bus
->self
->devfn
) == 8) {
437 slot
= PCI_SLOT(dev
->devfn
);
439 /* Must be a card-based bridge. */
441 /* Check for built-in bridge on hose 1. */
442 if (hose
->index
== 1 &&
443 PCI_SLOT(dev
->bus
->self
->devfn
) == 8) {
444 slot
= PCI_SLOT(dev
->devfn
);
447 pin
= pci_swizzle_interrupt_pin(dev
, pin
);
449 /* Move up the chain of bridges. */
450 dev
= dev
->bus
->self
;
451 /* Slot of the next bridge. */
452 slot
= PCI_SLOT(dev
->devfn
);
453 } while (dev
->bus
->self
);
460 webbrick_map_irq(const struct pci_dev
*dev
, u8 slot
, u8 pin
)
462 static char irq_tab
[13][5] __initdata
= {
463 /*INT INTA INTB INTC INTD */
464 { -1, -1, -1, -1, -1}, /* IdSel 7 ISA Bridge */
465 { -1, -1, -1, -1, -1}, /* IdSel 8 unused */
466 { 29, 29, 29, 29, 29}, /* IdSel 9 21143 #1 */
467 { -1, -1, -1, -1, -1}, /* IdSel 10 unused */
468 { 30, 30, 30, 30, 30}, /* IdSel 11 21143 #2 */
469 { -1, -1, -1, -1, -1}, /* IdSel 12 unused */
470 { -1, -1, -1, -1, -1}, /* IdSel 13 unused */
471 { 35, 35, 34, 33, 32}, /* IdSel 14 slot 0 */
472 { 39, 39, 38, 37, 36}, /* IdSel 15 slot 1 */
473 { 43, 43, 42, 41, 40}, /* IdSel 16 slot 2 */
474 { 47, 47, 46, 45, 44}, /* IdSel 17 slot 3 */
476 const long min_idsel
= 7, max_idsel
= 17, irqs_per_slot
= 5;
478 return isa_irq_fixup(dev
, COMMON_TABLE_LOOKUP
);
482 clipper_map_irq(const struct pci_dev
*dev
, u8 slot
, u8 pin
)
484 static char irq_tab
[7][5] __initdata
= {
485 /*INT INTA INTB INTC INTD */
486 { 16+ 8, 16+ 8, 16+ 9, 16+10, 16+11}, /* IdSel 1 slot 1 */
487 { 16+12, 16+12, 16+13, 16+14, 16+15}, /* IdSel 2 slot 2 */
488 { 16+16, 16+16, 16+17, 16+18, 16+19}, /* IdSel 3 slot 3 */
489 { 16+20, 16+20, 16+21, 16+22, 16+23}, /* IdSel 4 slot 4 */
490 { 16+24, 16+24, 16+25, 16+26, 16+27}, /* IdSel 5 slot 5 */
491 { 16+28, 16+28, 16+29, 16+30, 16+31}, /* IdSel 6 slot 6 */
492 { -1, -1, -1, -1, -1} /* IdSel 7 ISA Bridge */
494 const long min_idsel
= 1, max_idsel
= 7, irqs_per_slot
= 5;
495 struct pci_controller
*hose
= dev
->sysdata
;
496 int irq
= COMMON_TABLE_LOOKUP
;
499 irq
+= 16 * hose
->index
;
501 return isa_irq_fixup(dev
, irq
);
509 locate_and_init_vga(NULL
);
518 locate_and_init_vga(NULL
);
522 clipper_init_pci(void)
525 locate_and_init_vga(NULL
);
529 webbrick_init_arch(void)
533 /* Tsunami caches 4 PTEs at a time; DS10 has only 1 hose. */
534 hose_head
->sg_isa
->align_entry
= 4;
535 hose_head
->sg_pci
->align_entry
= 4;
543 struct alpha_machine_vector dp264_mv __initmv
= {
544 .vector_name
= "DP264",
548 .machine_check
= tsunami_machine_check
,
549 .max_isa_dma_address
= ALPHA_MAX_ISA_DMA_ADDRESS
,
550 .min_io_address
= DEFAULT_IO_BASE
,
551 .min_mem_address
= DEFAULT_MEM_BASE
,
552 .pci_dac_offset
= TSUNAMI_DAC_OFFSET
,
555 .device_interrupt
= dp264_device_interrupt
,
557 .init_arch
= tsunami_init_arch
,
558 .init_irq
= dp264_init_irq
,
559 .init_rtc
= common_init_rtc
,
560 .init_pci
= dp264_init_pci
,
561 .kill_arch
= tsunami_kill_arch
,
562 .pci_map_irq
= dp264_map_irq
,
563 .pci_swizzle
= common_swizzle
,
567 struct alpha_machine_vector monet_mv __initmv
= {
568 .vector_name
= "Monet",
572 .machine_check
= tsunami_machine_check
,
573 .max_isa_dma_address
= ALPHA_MAX_ISA_DMA_ADDRESS
,
574 .min_io_address
= DEFAULT_IO_BASE
,
575 .min_mem_address
= DEFAULT_MEM_BASE
,
576 .pci_dac_offset
= TSUNAMI_DAC_OFFSET
,
579 .device_interrupt
= dp264_device_interrupt
,
581 .init_arch
= tsunami_init_arch
,
582 .init_irq
= dp264_init_irq
,
583 .init_rtc
= common_init_rtc
,
584 .init_pci
= monet_init_pci
,
585 .kill_arch
= tsunami_kill_arch
,
586 .pci_map_irq
= monet_map_irq
,
587 .pci_swizzle
= monet_swizzle
,
590 struct alpha_machine_vector webbrick_mv __initmv
= {
591 .vector_name
= "Webbrick",
595 .machine_check
= tsunami_machine_check
,
596 .max_isa_dma_address
= ALPHA_MAX_ISA_DMA_ADDRESS
,
597 .min_io_address
= DEFAULT_IO_BASE
,
598 .min_mem_address
= DEFAULT_MEM_BASE
,
599 .pci_dac_offset
= TSUNAMI_DAC_OFFSET
,
602 .device_interrupt
= dp264_device_interrupt
,
604 .init_arch
= webbrick_init_arch
,
605 .init_irq
= dp264_init_irq
,
606 .init_rtc
= common_init_rtc
,
607 .init_pci
= common_init_pci
,
608 .kill_arch
= tsunami_kill_arch
,
609 .pci_map_irq
= webbrick_map_irq
,
610 .pci_swizzle
= common_swizzle
,
613 struct alpha_machine_vector clipper_mv __initmv
= {
614 .vector_name
= "Clipper",
618 .machine_check
= tsunami_machine_check
,
619 .max_isa_dma_address
= ALPHA_MAX_ISA_DMA_ADDRESS
,
620 .min_io_address
= DEFAULT_IO_BASE
,
621 .min_mem_address
= DEFAULT_MEM_BASE
,
622 .pci_dac_offset
= TSUNAMI_DAC_OFFSET
,
625 .device_interrupt
= dp264_device_interrupt
,
627 .init_arch
= tsunami_init_arch
,
628 .init_irq
= clipper_init_irq
,
629 .init_rtc
= common_init_rtc
,
630 .init_pci
= clipper_init_pci
,
631 .kill_arch
= tsunami_kill_arch
,
632 .pci_map_irq
= clipper_map_irq
,
633 .pci_swizzle
= common_swizzle
,
636 /* Sharks strongly resemble Clipper, at least as far
637 * as interrupt routing, etc, so we're using the
638 * same functions as Clipper does
641 struct alpha_machine_vector shark_mv __initmv
= {
642 .vector_name
= "Shark",
646 .machine_check
= tsunami_machine_check
,
647 .max_isa_dma_address
= ALPHA_MAX_ISA_DMA_ADDRESS
,
648 .min_io_address
= DEFAULT_IO_BASE
,
649 .min_mem_address
= DEFAULT_MEM_BASE
,
650 .pci_dac_offset
= TSUNAMI_DAC_OFFSET
,
653 .device_interrupt
= dp264_device_interrupt
,
655 .init_arch
= tsunami_init_arch
,
656 .init_irq
= clipper_init_irq
,
657 .init_rtc
= common_init_rtc
,
658 .init_pci
= common_init_pci
,
659 .kill_arch
= tsunami_kill_arch
,
660 .pci_map_irq
= clipper_map_irq
,
661 .pci_swizzle
= common_swizzle
,
664 /* No alpha_mv alias for webbrick/monet/clipper, since we compile them
665 in unconditionally with DP264; setup_arch knows how to cope. */