1 // SPDX-License-Identifier: GPL-2.0
3 * linux/arch/alpha/kernel/sys_dp264.c
5 * Copyright (C) 1995 David A Rusling
6 * Copyright (C) 1996, 1999 Jay A Estabrook
7 * Copyright (C) 1998, 1999 Richard Henderson
9 * Modified by Christopher C. Chimelis, 2001 to
10 * add support for the addition of Shark to the
13 * Code supporting the DP264 (EV6+TSUNAMI).
16 #include <linux/kernel.h>
17 #include <linux/types.h>
19 #include <linux/sched.h>
20 #include <linux/pci.h>
21 #include <linux/init.h>
22 #include <linux/bitops.h>
24 #include <asm/ptrace.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(struct irq_data *d)
103 spin_lock(&dp264_irq_lock);
104 cached_irq_mask |= 1UL << d->irq;
105 tsunami_update_irq_hw(cached_irq_mask);
106 spin_unlock(&dp264_irq_lock);
110 dp264_disable_irq(struct irq_data *d)
112 spin_lock(&dp264_irq_lock);
113 cached_irq_mask &= ~(1UL << d->irq);
114 tsunami_update_irq_hw(cached_irq_mask);
115 spin_unlock(&dp264_irq_lock);
119 clipper_enable_irq(struct irq_data *d)
121 spin_lock(&dp264_irq_lock);
122 cached_irq_mask |= 1UL << (d->irq - 16);
123 tsunami_update_irq_hw(cached_irq_mask);
124 spin_unlock(&dp264_irq_lock);
128 clipper_disable_irq(struct irq_data *d)
130 spin_lock(&dp264_irq_lock);
131 cached_irq_mask &= ~(1UL << (d->irq - 16));
132 tsunami_update_irq_hw(cached_irq_mask);
133 spin_unlock(&dp264_irq_lock);
137 cpu_set_irq_affinity(unsigned int irq, cpumask_t affinity)
141 for (cpu = 0; cpu < 4; cpu++) {
142 unsigned long aff = cpu_irq_affinity[cpu];
143 if (cpumask_test_cpu(cpu, &affinity))
146 aff &= ~(1UL << irq);
147 cpu_irq_affinity[cpu] = aff;
152 dp264_set_affinity(struct irq_data *d, const struct cpumask *affinity,
155 spin_lock(&dp264_irq_lock);
156 cpu_set_irq_affinity(d->irq, *affinity);
157 tsunami_update_irq_hw(cached_irq_mask);
158 spin_unlock(&dp264_irq_lock);
164 clipper_set_affinity(struct irq_data *d, const struct cpumask *affinity,
167 spin_lock(&dp264_irq_lock);
168 cpu_set_irq_affinity(d->irq - 16, *affinity);
169 tsunami_update_irq_hw(cached_irq_mask);
170 spin_unlock(&dp264_irq_lock);
175 static struct irq_chip dp264_irq_type = {
177 .irq_unmask = dp264_enable_irq,
178 .irq_mask = dp264_disable_irq,
179 .irq_mask_ack = dp264_disable_irq,
180 .irq_set_affinity = dp264_set_affinity,
183 static struct irq_chip clipper_irq_type = {
185 .irq_unmask = clipper_enable_irq,
186 .irq_mask = clipper_disable_irq,
187 .irq_mask_ack = clipper_disable_irq,
188 .irq_set_affinity = clipper_set_affinity,
192 dp264_device_interrupt(unsigned long vector)
197 /* Read the interrupt summary register of TSUNAMI */
198 pld = TSUNAMI_cchip->dir0.csr;
201 * Now for every possible bit set, work through them and call
202 * the appropriate interrupt handler.
206 pld &= pld - 1; /* clear least bit set */
208 isa_device_interrupt(vector);
215 dp264_srm_device_interrupt(unsigned long vector)
219 irq = (vector - 0x800) >> 4;
222 * The SRM console reports PCI interrupts with a vector calculated by:
224 * 0x900 + (0x10 * DRIR-bit)
226 * So bit 16 shows up as IRQ 32, etc.
228 * On DP264/BRICK/MONET, we adjust it down by 16 because at least
229 * that many of the low order bits of the DRIR are not used, and
230 * so we don't count them.
239 clipper_srm_device_interrupt(unsigned long vector)
243 irq = (vector - 0x800) >> 4;
246 * The SRM console reports PCI interrupts with a vector calculated by:
248 * 0x900 + (0x10 * DRIR-bit)
250 * So bit 16 shows up as IRQ 32, etc.
252 * CLIPPER uses bits 8-47 for PCI interrupts, so we do not need
253 * to scale down the vector reported, we just use it.
255 * Eg IRQ 24 is DRIR bit 8, etc, etc
261 init_tsunami_irqs(struct irq_chip * ops, int imin, int imax)
264 for (i = imin; i <= imax; ++i) {
265 irq_set_chip_and_handler(i, ops, handle_level_irq);
266 irq_set_status_flags(i, IRQ_LEVEL);
273 outb(0, DMA1_RESET_REG);
274 outb(0, DMA2_RESET_REG);
275 outb(DMA_MODE_CASCADE, DMA2_MODE_REG);
276 outb(0, DMA2_MASK_REG);
279 alpha_mv.device_interrupt = dp264_srm_device_interrupt;
281 tsunami_update_irq_hw(0);
284 init_tsunami_irqs(&dp264_irq_type, 16, 47);
288 clipper_init_irq(void)
290 outb(0, DMA1_RESET_REG);
291 outb(0, DMA2_RESET_REG);
292 outb(DMA_MODE_CASCADE, DMA2_MODE_REG);
293 outb(0, DMA2_MASK_REG);
296 alpha_mv.device_interrupt = clipper_srm_device_interrupt;
298 tsunami_update_irq_hw(0);
301 init_tsunami_irqs(&clipper_irq_type, 24, 63);
306 * PCI Fixup configuration.
308 * Summary @ TSUNAMI_CSR_DIM0:
311 *18 Interrupt SCSI B (Adaptec 7895 builtin)
312 *19 Interrupt SCSI A (Adaptec 7895 builtin)
313 *20 Interrupt Line D from slot 2 PCI0
314 *21 Interrupt Line C from slot 2 PCI0
315 *22 Interrupt Line B from slot 2 PCI0
316 *23 Interrupt Line A from slot 2 PCI0
317 *24 Interrupt Line D from slot 1 PCI0
318 *25 Interrupt Line C from slot 1 PCI0
319 *26 Interrupt Line B from slot 1 PCI0
320 *27 Interrupt Line A from slot 1 PCI0
321 *28 Interrupt Line D from slot 0 PCI0
322 *29 Interrupt Line C from slot 0 PCI0
323 *30 Interrupt Line B from slot 0 PCI0
324 *31 Interrupt Line A from slot 0 PCI0
326 *32 Interrupt Line D from slot 3 PCI1
327 *33 Interrupt Line C from slot 3 PCI1
328 *34 Interrupt Line B from slot 3 PCI1
329 *35 Interrupt Line A from slot 3 PCI1
330 *36 Interrupt Line D from slot 2 PCI1
331 *37 Interrupt Line C from slot 2 PCI1
332 *38 Interrupt Line B from slot 2 PCI1
333 *39 Interrupt Line A from slot 2 PCI1
334 *40 Interrupt Line D from slot 1 PCI1
335 *41 Interrupt Line C from slot 1 PCI1
336 *42 Interrupt Line B from slot 1 PCI1
337 *43 Interrupt Line A from slot 1 PCI1
338 *44 Interrupt Line D from slot 0 PCI1
339 *45 Interrupt Line C from slot 0 PCI1
340 *46 Interrupt Line B from slot 0 PCI1
341 *47 Interrupt Line A from slot 0 PCI1
343 *53 PCI0 NMI (from Cypress)
344 *54 PCI0 SMI INT (from Cypress)
345 *55 PCI0 ISA Interrupt (from Cypress)
352 * 5 Cypress Bridge I/O
353 * 6 SCSI Adaptec builtin
354 * 7 64 bit PCI option slot 0 (all busses)
355 * 8 64 bit PCI option slot 1 (all busses)
356 * 9 64 bit PCI option slot 2 (all busses)
357 * 10 64 bit PCI option slot 3 (not bus 0)
361 isa_irq_fixup(const struct pci_dev *dev, int irq)
368 /* This interrupt is routed via ISA bridge, so we'll
369 just have to trust whatever value the console might
371 pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq8);
377 dp264_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
379 static char irq_tab[6][5] = {
380 /*INT INTA INTB INTC INTD */
381 { -1, -1, -1, -1, -1}, /* IdSel 5 ISA Bridge */
382 { 16+ 3, 16+ 3, 16+ 2, 16+ 2, 16+ 2}, /* IdSel 6 SCSI builtin*/
383 { 16+15, 16+15, 16+14, 16+13, 16+12}, /* IdSel 7 slot 0 */
384 { 16+11, 16+11, 16+10, 16+ 9, 16+ 8}, /* IdSel 8 slot 1 */
385 { 16+ 7, 16+ 7, 16+ 6, 16+ 5, 16+ 4}, /* IdSel 9 slot 2 */
386 { 16+ 3, 16+ 3, 16+ 2, 16+ 1, 16+ 0} /* IdSel 10 slot 3 */
388 const long min_idsel = 5, max_idsel = 10, irqs_per_slot = 5;
389 struct pci_controller *hose = dev->sysdata;
390 int irq = COMMON_TABLE_LOOKUP;
393 irq += 16 * hose->index;
395 return isa_irq_fixup(dev, irq);
399 monet_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
401 static char irq_tab[13][5] = {
402 /*INT INTA INTB INTC INTD */
403 { 45, 45, 45, 45, 45}, /* IdSel 3 21143 PCI1 */
404 { -1, -1, -1, -1, -1}, /* IdSel 4 unused */
405 { -1, -1, -1, -1, -1}, /* IdSel 5 unused */
406 { 47, 47, 47, 47, 47}, /* IdSel 6 SCSI PCI1 */
407 { -1, -1, -1, -1, -1}, /* IdSel 7 ISA Bridge */
408 { -1, -1, -1, -1, -1}, /* IdSel 8 P2P PCI1 */
410 { 28, 28, 29, 30, 31}, /* IdSel 14 slot 4 PCI2*/
411 { 24, 24, 25, 26, 27}, /* IdSel 15 slot 5 PCI2*/
413 { -1, -1, -1, -1, -1}, /* IdSel 9 unused */
414 { -1, -1, -1, -1, -1}, /* IdSel 10 unused */
416 { 40, 40, 41, 42, 43}, /* IdSel 11 slot 1 PCI0*/
417 { 36, 36, 37, 38, 39}, /* IdSel 12 slot 2 PCI0*/
418 { 32, 32, 33, 34, 35}, /* IdSel 13 slot 3 PCI0*/
419 { 28, 28, 29, 30, 31}, /* IdSel 14 slot 4 PCI2*/
420 { 24, 24, 25, 26, 27} /* IdSel 15 slot 5 PCI2*/
422 const long min_idsel = 3, max_idsel = 15, irqs_per_slot = 5;
424 return isa_irq_fixup(dev, COMMON_TABLE_LOOKUP);
428 monet_swizzle(struct pci_dev *dev, u8 *pinp)
430 struct pci_controller *hose = dev->sysdata;
431 int slot, pin = *pinp;
433 if (!dev->bus->parent) {
434 slot = PCI_SLOT(dev->devfn);
436 /* Check for the built-in bridge on hose 1. */
437 else if (hose->index == 1 && PCI_SLOT(dev->bus->self->devfn) == 8) {
438 slot = PCI_SLOT(dev->devfn);
440 /* Must be a card-based bridge. */
442 /* Check for built-in bridge on hose 1. */
443 if (hose->index == 1 &&
444 PCI_SLOT(dev->bus->self->devfn) == 8) {
445 slot = PCI_SLOT(dev->devfn);
448 pin = pci_swizzle_interrupt_pin(dev, pin);
450 /* Move up the chain of bridges. */
451 dev = dev->bus->self;
452 /* Slot of the next bridge. */
453 slot = PCI_SLOT(dev->devfn);
454 } while (dev->bus->self);
461 webbrick_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
463 static char irq_tab[13][5] = {
464 /*INT INTA INTB INTC INTD */
465 { -1, -1, -1, -1, -1}, /* IdSel 7 ISA Bridge */
466 { -1, -1, -1, -1, -1}, /* IdSel 8 unused */
467 { 29, 29, 29, 29, 29}, /* IdSel 9 21143 #1 */
468 { -1, -1, -1, -1, -1}, /* IdSel 10 unused */
469 { 30, 30, 30, 30, 30}, /* IdSel 11 21143 #2 */
470 { -1, -1, -1, -1, -1}, /* IdSel 12 unused */
471 { -1, -1, -1, -1, -1}, /* IdSel 13 unused */
472 { 35, 35, 34, 33, 32}, /* IdSel 14 slot 0 */
473 { 39, 39, 38, 37, 36}, /* IdSel 15 slot 1 */
474 { 43, 43, 42, 41, 40}, /* IdSel 16 slot 2 */
475 { 47, 47, 46, 45, 44}, /* IdSel 17 slot 3 */
477 const long min_idsel = 7, max_idsel = 17, irqs_per_slot = 5;
479 return isa_irq_fixup(dev, COMMON_TABLE_LOOKUP);
483 clipper_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
485 static char irq_tab[7][5] = {
486 /*INT INTA INTB INTC INTD */
487 { 16+ 8, 16+ 8, 16+ 9, 16+10, 16+11}, /* IdSel 1 slot 1 */
488 { 16+12, 16+12, 16+13, 16+14, 16+15}, /* IdSel 2 slot 2 */
489 { 16+16, 16+16, 16+17, 16+18, 16+19}, /* IdSel 3 slot 3 */
490 { 16+20, 16+20, 16+21, 16+22, 16+23}, /* IdSel 4 slot 4 */
491 { 16+24, 16+24, 16+25, 16+26, 16+27}, /* IdSel 5 slot 5 */
492 { 16+28, 16+28, 16+29, 16+30, 16+31}, /* IdSel 6 slot 6 */
493 { -1, -1, -1, -1, -1} /* IdSel 7 ISA Bridge */
495 const long min_idsel = 1, max_idsel = 7, irqs_per_slot = 5;
496 struct pci_controller *hose = dev->sysdata;
497 int irq = COMMON_TABLE_LOOKUP;
500 irq += 16 * hose->index;
502 return isa_irq_fixup(dev, irq);
510 locate_and_init_vga(NULL);
519 locate_and_init_vga(NULL);
523 clipper_init_pci(void)
526 locate_and_init_vga(NULL);
530 webbrick_init_arch(void)
534 /* Tsunami caches 4 PTEs at a time; DS10 has only 1 hose. */
535 hose_head->sg_isa->align_entry = 4;
536 hose_head->sg_pci->align_entry = 4;
544 struct alpha_machine_vector dp264_mv __initmv = {
545 .vector_name = "DP264",
549 .machine_check = tsunami_machine_check,
550 .max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
551 .min_io_address = DEFAULT_IO_BASE,
552 .min_mem_address = DEFAULT_MEM_BASE,
553 .pci_dac_offset = TSUNAMI_DAC_OFFSET,
556 .device_interrupt = dp264_device_interrupt,
558 .init_arch = tsunami_init_arch,
559 .init_irq = dp264_init_irq,
560 .init_rtc = common_init_rtc,
561 .init_pci = dp264_init_pci,
562 .kill_arch = tsunami_kill_arch,
563 .pci_map_irq = dp264_map_irq,
564 .pci_swizzle = common_swizzle,
568 struct alpha_machine_vector monet_mv __initmv = {
569 .vector_name = "Monet",
573 .machine_check = tsunami_machine_check,
574 .max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
575 .min_io_address = DEFAULT_IO_BASE,
576 .min_mem_address = DEFAULT_MEM_BASE,
577 .pci_dac_offset = TSUNAMI_DAC_OFFSET,
580 .device_interrupt = dp264_device_interrupt,
582 .init_arch = tsunami_init_arch,
583 .init_irq = dp264_init_irq,
584 .init_rtc = common_init_rtc,
585 .init_pci = monet_init_pci,
586 .kill_arch = tsunami_kill_arch,
587 .pci_map_irq = monet_map_irq,
588 .pci_swizzle = monet_swizzle,
591 struct alpha_machine_vector webbrick_mv __initmv = {
592 .vector_name = "Webbrick",
596 .machine_check = tsunami_machine_check,
597 .max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
598 .min_io_address = DEFAULT_IO_BASE,
599 .min_mem_address = DEFAULT_MEM_BASE,
600 .pci_dac_offset = TSUNAMI_DAC_OFFSET,
603 .device_interrupt = dp264_device_interrupt,
605 .init_arch = webbrick_init_arch,
606 .init_irq = dp264_init_irq,
607 .init_rtc = common_init_rtc,
608 .init_pci = common_init_pci,
609 .kill_arch = tsunami_kill_arch,
610 .pci_map_irq = webbrick_map_irq,
611 .pci_swizzle = common_swizzle,
614 struct alpha_machine_vector clipper_mv __initmv = {
615 .vector_name = "Clipper",
619 .machine_check = tsunami_machine_check,
620 .max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
621 .min_io_address = DEFAULT_IO_BASE,
622 .min_mem_address = DEFAULT_MEM_BASE,
623 .pci_dac_offset = TSUNAMI_DAC_OFFSET,
626 .device_interrupt = dp264_device_interrupt,
628 .init_arch = tsunami_init_arch,
629 .init_irq = clipper_init_irq,
630 .init_rtc = common_init_rtc,
631 .init_pci = clipper_init_pci,
632 .kill_arch = tsunami_kill_arch,
633 .pci_map_irq = clipper_map_irq,
634 .pci_swizzle = common_swizzle,
637 /* Sharks strongly resemble Clipper, at least as far
638 * as interrupt routing, etc, so we're using the
639 * same functions as Clipper does
642 struct alpha_machine_vector shark_mv __initmv = {
643 .vector_name = "Shark",
647 .machine_check = tsunami_machine_check,
648 .max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS,
649 .min_io_address = DEFAULT_IO_BASE,
650 .min_mem_address = DEFAULT_MEM_BASE,
651 .pci_dac_offset = TSUNAMI_DAC_OFFSET,
654 .device_interrupt = dp264_device_interrupt,
656 .init_arch = tsunami_init_arch,
657 .init_irq = clipper_init_irq,
658 .init_rtc = common_init_rtc,
659 .init_pci = common_init_pci,
660 .kill_arch = tsunami_kill_arch,
661 .pci_map_irq = clipper_map_irq,
662 .pci_swizzle = common_swizzle,
665 /* No alpha_mv alias for webbrick/monet/clipper, since we compile them
666 in unconditionally with DP264; setup_arch knows how to cope. */