2 * sbus.c: UltraSparc SBUS controller support.
4 * Copyright (C) 1999 David S. Miller (davem@redhat.com)
7 #include <linux/kernel.h>
8 #include <linux/types.h>
10 #include <linux/spinlock.h>
11 #include <linux/slab.h>
12 #include <linux/init.h>
13 #include <linux/interrupt.h>
15 #include <linux/of_device.h>
20 #include <asm/cache.h>
24 #include <asm/oplib.h>
25 #include <asm/starfire.h>
27 #include "iommu_common.h"
29 #define MAP_BASE ((u32)0xc0000000)
31 /* Offsets from iommu_regs */
32 #define SYSIO_IOMMUREG_BASE 0x2400UL
33 #define IOMMU_CONTROL (0x2400UL - 0x2400UL) /* IOMMU control register */
34 #define IOMMU_TSBBASE (0x2408UL - 0x2400UL) /* TSB base address register */
35 #define IOMMU_FLUSH (0x2410UL - 0x2400UL) /* IOMMU flush register */
36 #define IOMMU_VADIAG (0x4400UL - 0x2400UL) /* SBUS virtual address diagnostic */
37 #define IOMMU_TAGCMP (0x4408UL - 0x2400UL) /* TLB tag compare diagnostics */
38 #define IOMMU_LRUDIAG (0x4500UL - 0x2400UL) /* IOMMU LRU queue diagnostics */
39 #define IOMMU_TAGDIAG (0x4580UL - 0x2400UL) /* TLB tag diagnostics */
40 #define IOMMU_DRAMDIAG (0x4600UL - 0x2400UL) /* TLB data RAM diagnostics */
42 #define IOMMU_DRAM_VALID (1UL << 30UL)
44 /* Offsets from strbuf_regs */
45 #define SYSIO_STRBUFREG_BASE 0x2800UL
46 #define STRBUF_CONTROL (0x2800UL - 0x2800UL) /* Control */
47 #define STRBUF_PFLUSH (0x2808UL - 0x2800UL) /* Page flush/invalidate */
48 #define STRBUF_FSYNC (0x2810UL - 0x2800UL) /* Flush synchronization */
49 #define STRBUF_DRAMDIAG (0x5000UL - 0x2800UL) /* data RAM diagnostic */
50 #define STRBUF_ERRDIAG (0x5400UL - 0x2800UL) /* error status diagnostics */
51 #define STRBUF_PTAGDIAG (0x5800UL - 0x2800UL) /* Page tag diagnostics */
52 #define STRBUF_LTAGDIAG (0x5900UL - 0x2800UL) /* Line tag diagnostics */
54 #define STRBUF_TAG_VALID 0x02UL
56 /* Enable 64-bit DVMA mode for the given device. */
57 void sbus_set_sbus64(struct device *dev, int bursts)
59 struct iommu *iommu = dev->archdata.iommu;
60 struct of_device *op = to_of_device(dev);
61 const struct linux_prom_registers *regs;
62 unsigned long cfg_reg;
66 regs = of_get_property(op->node, "reg", NULL);
68 printk(KERN_ERR "sbus_set_sbus64: Cannot find regs for %s\n",
72 slot = regs->which_io;
74 cfg_reg = iommu->write_complete_reg;
102 val = upa_readq(cfg_reg);
103 if (val & (1UL << 14UL)) {
104 /* Extended transfer mode already enabled. */
108 val |= (1UL << 14UL);
110 if (bursts & DMA_BURST8)
112 if (bursts & DMA_BURST16)
114 if (bursts & DMA_BURST32)
116 if (bursts & DMA_BURST64)
118 upa_writeq(val, cfg_reg);
121 /* INO number to IMAP register offset for SYSIO external IRQ's.
122 * This should conform to both Sunfire/Wildfire server and Fusion
125 #define SYSIO_IMAP_SLOT0 0x2c00UL
126 #define SYSIO_IMAP_SLOT1 0x2c08UL
127 #define SYSIO_IMAP_SLOT2 0x2c10UL
128 #define SYSIO_IMAP_SLOT3 0x2c18UL
129 #define SYSIO_IMAP_SCSI 0x3000UL
130 #define SYSIO_IMAP_ETH 0x3008UL
131 #define SYSIO_IMAP_BPP 0x3010UL
132 #define SYSIO_IMAP_AUDIO 0x3018UL
133 #define SYSIO_IMAP_PFAIL 0x3020UL
134 #define SYSIO_IMAP_KMS 0x3028UL
135 #define SYSIO_IMAP_FLPY 0x3030UL
136 #define SYSIO_IMAP_SHW 0x3038UL
137 #define SYSIO_IMAP_KBD 0x3040UL
138 #define SYSIO_IMAP_MS 0x3048UL
139 #define SYSIO_IMAP_SER 0x3050UL
140 #define SYSIO_IMAP_TIM0 0x3060UL
141 #define SYSIO_IMAP_TIM1 0x3068UL
142 #define SYSIO_IMAP_UE 0x3070UL
143 #define SYSIO_IMAP_CE 0x3078UL
144 #define SYSIO_IMAP_SBERR 0x3080UL
145 #define SYSIO_IMAP_PMGMT 0x3088UL
146 #define SYSIO_IMAP_GFX 0x3090UL
147 #define SYSIO_IMAP_EUPA 0x3098UL
149 #define bogon ((unsigned long) -1)
150 static unsigned long sysio_irq_offsets[] = {
151 /* SBUS Slot 0 --> 3, level 1 --> 7 */
152 SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0,
153 SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0,
154 SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1,
155 SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1,
156 SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2,
157 SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2,
158 SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3,
159 SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3,
161 /* Onboard devices (not relevant/used on SunFire). */
190 #define NUM_SYSIO_OFFSETS ARRAY_SIZE(sysio_irq_offsets)
192 /* Convert Interrupt Mapping register pointer to associated
193 * Interrupt Clear register pointer, SYSIO specific version.
195 #define SYSIO_ICLR_UNUSED0 0x3400UL
196 #define SYSIO_ICLR_SLOT0 0x3408UL
197 #define SYSIO_ICLR_SLOT1 0x3448UL
198 #define SYSIO_ICLR_SLOT2 0x3488UL
199 #define SYSIO_ICLR_SLOT3 0x34c8UL
200 static unsigned long sysio_imap_to_iclr(unsigned long imap)
202 unsigned long diff = SYSIO_ICLR_UNUSED0 - SYSIO_IMAP_SLOT0;
206 static unsigned int sbus_build_irq(struct of_device *op, unsigned int ino)
208 struct iommu *iommu = op->dev.archdata.iommu;
209 unsigned long reg_base = iommu->write_complete_reg - 0x2000UL;
210 unsigned long imap, iclr;
213 imap = sysio_irq_offsets[ino];
214 if (imap == ((unsigned long)-1)) {
215 prom_printf("get_irq_translations: Bad SYSIO INO[%x]\n",
221 /* SYSIO inconsistency. For external SLOTS, we have to select
222 * the right ICLR register based upon the lower SBUS irq level
226 iclr = sysio_imap_to_iclr(imap);
228 int sbus_slot = (ino & 0x18)>>3;
230 sbus_level = ino & 0x7;
234 iclr = reg_base + SYSIO_ICLR_SLOT0;
237 iclr = reg_base + SYSIO_ICLR_SLOT1;
240 iclr = reg_base + SYSIO_ICLR_SLOT2;
244 iclr = reg_base + SYSIO_ICLR_SLOT3;
248 iclr += ((unsigned long)sbus_level - 1UL) * 8UL;
250 return build_irq(sbus_level, iclr, imap);
253 /* Error interrupt handling. */
254 #define SYSIO_UE_AFSR 0x0030UL
255 #define SYSIO_UE_AFAR 0x0038UL
256 #define SYSIO_UEAFSR_PPIO 0x8000000000000000UL /* Primary PIO cause */
257 #define SYSIO_UEAFSR_PDRD 0x4000000000000000UL /* Primary DVMA read cause */
258 #define SYSIO_UEAFSR_PDWR 0x2000000000000000UL /* Primary DVMA write cause */
259 #define SYSIO_UEAFSR_SPIO 0x1000000000000000UL /* Secondary PIO is cause */
260 #define SYSIO_UEAFSR_SDRD 0x0800000000000000UL /* Secondary DVMA read cause */
261 #define SYSIO_UEAFSR_SDWR 0x0400000000000000UL /* Secondary DVMA write cause*/
262 #define SYSIO_UEAFSR_RESV1 0x03ff000000000000UL /* Reserved */
263 #define SYSIO_UEAFSR_DOFF 0x0000e00000000000UL /* Doubleword Offset */
264 #define SYSIO_UEAFSR_SIZE 0x00001c0000000000UL /* Bad transfer size 2^SIZE */
265 #define SYSIO_UEAFSR_MID 0x000003e000000000UL /* UPA MID causing the fault */
266 #define SYSIO_UEAFSR_RESV2 0x0000001fffffffffUL /* Reserved */
267 static irqreturn_t sysio_ue_handler(int irq, void *dev_id)
269 struct of_device *op = dev_id;
270 struct iommu *iommu = op->dev.archdata.iommu;
271 unsigned long reg_base = iommu->write_complete_reg - 0x2000UL;
272 unsigned long afsr_reg, afar_reg;
273 unsigned long afsr, afar, error_bits;
274 int reported, portid;
276 afsr_reg = reg_base + SYSIO_UE_AFSR;
277 afar_reg = reg_base + SYSIO_UE_AFAR;
279 /* Latch error status. */
280 afsr = upa_readq(afsr_reg);
281 afar = upa_readq(afar_reg);
283 /* Clear primary/secondary error status bits. */
285 (SYSIO_UEAFSR_PPIO | SYSIO_UEAFSR_PDRD | SYSIO_UEAFSR_PDWR |
286 SYSIO_UEAFSR_SPIO | SYSIO_UEAFSR_SDRD | SYSIO_UEAFSR_SDWR);
287 upa_writeq(error_bits, afsr_reg);
289 portid = of_getintprop_default(op->node, "portid", -1);
292 printk("SYSIO[%x]: Uncorrectable ECC Error, primary error type[%s]\n",
294 (((error_bits & SYSIO_UEAFSR_PPIO) ?
296 ((error_bits & SYSIO_UEAFSR_PDRD) ?
298 ((error_bits & SYSIO_UEAFSR_PDWR) ?
299 "DVMA Write" : "???")))));
300 printk("SYSIO[%x]: DOFF[%lx] SIZE[%lx] MID[%lx]\n",
302 (afsr & SYSIO_UEAFSR_DOFF) >> 45UL,
303 (afsr & SYSIO_UEAFSR_SIZE) >> 42UL,
304 (afsr & SYSIO_UEAFSR_MID) >> 37UL);
305 printk("SYSIO[%x]: AFAR[%016lx]\n", portid, afar);
306 printk("SYSIO[%x]: Secondary UE errors [", portid);
308 if (afsr & SYSIO_UEAFSR_SPIO) {
312 if (afsr & SYSIO_UEAFSR_SDRD) {
314 printk("(DVMA Read)");
316 if (afsr & SYSIO_UEAFSR_SDWR) {
318 printk("(DVMA Write)");
327 #define SYSIO_CE_AFSR 0x0040UL
328 #define SYSIO_CE_AFAR 0x0048UL
329 #define SYSIO_CEAFSR_PPIO 0x8000000000000000UL /* Primary PIO cause */
330 #define SYSIO_CEAFSR_PDRD 0x4000000000000000UL /* Primary DVMA read cause */
331 #define SYSIO_CEAFSR_PDWR 0x2000000000000000UL /* Primary DVMA write cause */
332 #define SYSIO_CEAFSR_SPIO 0x1000000000000000UL /* Secondary PIO cause */
333 #define SYSIO_CEAFSR_SDRD 0x0800000000000000UL /* Secondary DVMA read cause */
334 #define SYSIO_CEAFSR_SDWR 0x0400000000000000UL /* Secondary DVMA write cause*/
335 #define SYSIO_CEAFSR_RESV1 0x0300000000000000UL /* Reserved */
336 #define SYSIO_CEAFSR_ESYND 0x00ff000000000000UL /* Syndrome Bits */
337 #define SYSIO_CEAFSR_DOFF 0x0000e00000000000UL /* Double Offset */
338 #define SYSIO_CEAFSR_SIZE 0x00001c0000000000UL /* Bad transfer size 2^SIZE */
339 #define SYSIO_CEAFSR_MID 0x000003e000000000UL /* UPA MID causing the fault */
340 #define SYSIO_CEAFSR_RESV2 0x0000001fffffffffUL /* Reserved */
341 static irqreturn_t sysio_ce_handler(int irq, void *dev_id)
343 struct of_device *op = dev_id;
344 struct iommu *iommu = op->dev.archdata.iommu;
345 unsigned long reg_base = iommu->write_complete_reg - 0x2000UL;
346 unsigned long afsr_reg, afar_reg;
347 unsigned long afsr, afar, error_bits;
348 int reported, portid;
350 afsr_reg = reg_base + SYSIO_CE_AFSR;
351 afar_reg = reg_base + SYSIO_CE_AFAR;
353 /* Latch error status. */
354 afsr = upa_readq(afsr_reg);
355 afar = upa_readq(afar_reg);
357 /* Clear primary/secondary error status bits. */
359 (SYSIO_CEAFSR_PPIO | SYSIO_CEAFSR_PDRD | SYSIO_CEAFSR_PDWR |
360 SYSIO_CEAFSR_SPIO | SYSIO_CEAFSR_SDRD | SYSIO_CEAFSR_SDWR);
361 upa_writeq(error_bits, afsr_reg);
363 portid = of_getintprop_default(op->node, "portid", -1);
365 printk("SYSIO[%x]: Correctable ECC Error, primary error type[%s]\n",
367 (((error_bits & SYSIO_CEAFSR_PPIO) ?
369 ((error_bits & SYSIO_CEAFSR_PDRD) ?
371 ((error_bits & SYSIO_CEAFSR_PDWR) ?
372 "DVMA Write" : "???")))));
374 /* XXX Use syndrome and afar to print out module string just like
375 * XXX UDB CE trap handler does... -DaveM
377 printk("SYSIO[%x]: DOFF[%lx] ECC Syndrome[%lx] Size[%lx] MID[%lx]\n",
379 (afsr & SYSIO_CEAFSR_DOFF) >> 45UL,
380 (afsr & SYSIO_CEAFSR_ESYND) >> 48UL,
381 (afsr & SYSIO_CEAFSR_SIZE) >> 42UL,
382 (afsr & SYSIO_CEAFSR_MID) >> 37UL);
383 printk("SYSIO[%x]: AFAR[%016lx]\n", portid, afar);
385 printk("SYSIO[%x]: Secondary CE errors [", portid);
387 if (afsr & SYSIO_CEAFSR_SPIO) {
391 if (afsr & SYSIO_CEAFSR_SDRD) {
393 printk("(DVMA Read)");
395 if (afsr & SYSIO_CEAFSR_SDWR) {
397 printk("(DVMA Write)");
406 #define SYSIO_SBUS_AFSR 0x2010UL
407 #define SYSIO_SBUS_AFAR 0x2018UL
408 #define SYSIO_SBAFSR_PLE 0x8000000000000000UL /* Primary Late PIO Error */
409 #define SYSIO_SBAFSR_PTO 0x4000000000000000UL /* Primary SBUS Timeout */
410 #define SYSIO_SBAFSR_PBERR 0x2000000000000000UL /* Primary SBUS Error ACK */
411 #define SYSIO_SBAFSR_SLE 0x1000000000000000UL /* Secondary Late PIO Error */
412 #define SYSIO_SBAFSR_STO 0x0800000000000000UL /* Secondary SBUS Timeout */
413 #define SYSIO_SBAFSR_SBERR 0x0400000000000000UL /* Secondary SBUS Error ACK */
414 #define SYSIO_SBAFSR_RESV1 0x03ff000000000000UL /* Reserved */
415 #define SYSIO_SBAFSR_RD 0x0000800000000000UL /* Primary was late PIO read */
416 #define SYSIO_SBAFSR_RESV2 0x0000600000000000UL /* Reserved */
417 #define SYSIO_SBAFSR_SIZE 0x00001c0000000000UL /* Size of transfer */
418 #define SYSIO_SBAFSR_MID 0x000003e000000000UL /* MID causing the error */
419 #define SYSIO_SBAFSR_RESV3 0x0000001fffffffffUL /* Reserved */
420 static irqreturn_t sysio_sbus_error_handler(int irq, void *dev_id)
422 struct of_device *op = dev_id;
423 struct iommu *iommu = op->dev.archdata.iommu;
424 unsigned long afsr_reg, afar_reg, reg_base;
425 unsigned long afsr, afar, error_bits;
426 int reported, portid;
428 reg_base = iommu->write_complete_reg - 0x2000UL;
429 afsr_reg = reg_base + SYSIO_SBUS_AFSR;
430 afar_reg = reg_base + SYSIO_SBUS_AFAR;
432 afsr = upa_readq(afsr_reg);
433 afar = upa_readq(afar_reg);
435 /* Clear primary/secondary error status bits. */
437 (SYSIO_SBAFSR_PLE | SYSIO_SBAFSR_PTO | SYSIO_SBAFSR_PBERR |
438 SYSIO_SBAFSR_SLE | SYSIO_SBAFSR_STO | SYSIO_SBAFSR_SBERR);
439 upa_writeq(error_bits, afsr_reg);
441 portid = of_getintprop_default(op->node, "portid", -1);
444 printk("SYSIO[%x]: SBUS Error, primary error type[%s] read(%d)\n",
446 (((error_bits & SYSIO_SBAFSR_PLE) ?
448 ((error_bits & SYSIO_SBAFSR_PTO) ?
450 ((error_bits & SYSIO_SBAFSR_PBERR) ?
451 "Error Ack" : "???")))),
452 (afsr & SYSIO_SBAFSR_RD) ? 1 : 0);
453 printk("SYSIO[%x]: size[%lx] MID[%lx]\n",
455 (afsr & SYSIO_SBAFSR_SIZE) >> 42UL,
456 (afsr & SYSIO_SBAFSR_MID) >> 37UL);
457 printk("SYSIO[%x]: AFAR[%016lx]\n", portid, afar);
458 printk("SYSIO[%x]: Secondary SBUS errors [", portid);
460 if (afsr & SYSIO_SBAFSR_SLE) {
462 printk("(Late PIO Error)");
464 if (afsr & SYSIO_SBAFSR_STO) {
466 printk("(Time Out)");
468 if (afsr & SYSIO_SBAFSR_SBERR) {
470 printk("(Error Ack)");
476 /* XXX check iommu/strbuf for further error status XXX */
481 #define ECC_CONTROL 0x0020UL
482 #define SYSIO_ECNTRL_ECCEN 0x8000000000000000UL /* Enable ECC Checking */
483 #define SYSIO_ECNTRL_UEEN 0x4000000000000000UL /* Enable UE Interrupts */
484 #define SYSIO_ECNTRL_CEEN 0x2000000000000000UL /* Enable CE Interrupts */
486 #define SYSIO_UE_INO 0x34
487 #define SYSIO_CE_INO 0x35
488 #define SYSIO_SBUSERR_INO 0x36
490 static void __init sysio_register_error_handlers(struct of_device *op)
492 struct iommu *iommu = op->dev.archdata.iommu;
493 unsigned long reg_base = iommu->write_complete_reg - 0x2000UL;
498 portid = of_getintprop_default(op->node, "portid", -1);
500 irq = sbus_build_irq(op, SYSIO_UE_INO);
501 if (request_irq(irq, sysio_ue_handler, 0,
502 "SYSIO_UE", op) < 0) {
503 prom_printf("SYSIO[%x]: Cannot register UE interrupt.\n",
508 irq = sbus_build_irq(op, SYSIO_CE_INO);
509 if (request_irq(irq, sysio_ce_handler, 0,
510 "SYSIO_CE", op) < 0) {
511 prom_printf("SYSIO[%x]: Cannot register CE interrupt.\n",
516 irq = sbus_build_irq(op, SYSIO_SBUSERR_INO);
517 if (request_irq(irq, sysio_sbus_error_handler, 0,
518 "SYSIO_SBERR", op) < 0) {
519 prom_printf("SYSIO[%x]: Cannot register SBUS Error interrupt.\n",
524 /* Now turn the error interrupts on and also enable ECC checking. */
525 upa_writeq((SYSIO_ECNTRL_ECCEN |
528 reg_base + ECC_CONTROL);
530 control = upa_readq(iommu->write_complete_reg);
531 control |= 0x100UL; /* SBUS Error Interrupt Enable */
532 upa_writeq(control, iommu->write_complete_reg);
535 /* Boot time initialization. */
536 static void __init sbus_iommu_init(struct of_device *op)
538 const struct linux_prom64_registers *pr;
539 struct device_node *dp = op->node;
541 struct strbuf *strbuf;
542 unsigned long regs, reg_base;
546 pr = of_get_property(dp, "reg", NULL);
548 prom_printf("sbus_iommu_init: Cannot map SYSIO "
549 "control registers.\n");
552 regs = pr->phys_addr;
554 iommu = kzalloc(sizeof(*iommu), GFP_ATOMIC);
556 goto fatal_memory_error;
557 strbuf = kzalloc(sizeof(*strbuf), GFP_ATOMIC);
559 goto fatal_memory_error;
561 op->dev.archdata.iommu = iommu;
562 op->dev.archdata.stc = strbuf;
563 op->dev.archdata.numa_node = -1;
565 reg_base = regs + SYSIO_IOMMUREG_BASE;
566 iommu->iommu_control = reg_base + IOMMU_CONTROL;
567 iommu->iommu_tsbbase = reg_base + IOMMU_TSBBASE;
568 iommu->iommu_flush = reg_base + IOMMU_FLUSH;
569 iommu->iommu_tags = iommu->iommu_control +
570 (IOMMU_TAGDIAG - IOMMU_CONTROL);
572 reg_base = regs + SYSIO_STRBUFREG_BASE;
573 strbuf->strbuf_control = reg_base + STRBUF_CONTROL;
574 strbuf->strbuf_pflush = reg_base + STRBUF_PFLUSH;
575 strbuf->strbuf_fsync = reg_base + STRBUF_FSYNC;
577 strbuf->strbuf_enabled = 1;
579 strbuf->strbuf_flushflag = (volatile unsigned long *)
580 ((((unsigned long)&strbuf->__flushflag_buf[0])
583 strbuf->strbuf_flushflag_pa = (unsigned long)
584 __pa(strbuf->strbuf_flushflag);
586 /* The SYSIO SBUS control register is used for dummy reads
587 * in order to ensure write completion.
589 iommu->write_complete_reg = regs + 0x2000UL;
591 portid = of_getintprop_default(op->node, "portid", -1);
592 printk(KERN_INFO "SYSIO: UPA portID %x, at %016lx\n",
595 /* Setup for TSB_SIZE=7, TBW_SIZE=0, MMU_DE=1, MMU_EN=1 */
596 if (iommu_table_init(iommu, IO_TSB_SIZE, MAP_BASE, 0xffffffff, -1))
597 goto fatal_memory_error;
599 control = upa_readq(iommu->iommu_control);
600 control = ((7UL << 16UL) |
604 upa_writeq(control, iommu->iommu_control);
606 /* Clean out any cruft in the IOMMU using
607 * diagnostic accesses.
609 for (i = 0; i < 16; i++) {
610 unsigned long dram, tag;
612 dram = iommu->iommu_control + (IOMMU_DRAMDIAG - IOMMU_CONTROL);
613 tag = iommu->iommu_control + (IOMMU_TAGDIAG - IOMMU_CONTROL);
615 dram += (unsigned long)i * 8UL;
616 tag += (unsigned long)i * 8UL;
620 upa_readq(iommu->write_complete_reg);
622 /* Give the TSB to SYSIO. */
623 upa_writeq(__pa(iommu->page_table), iommu->iommu_tsbbase);
625 /* Setup streaming buffer, DE=1 SB_EN=1 */
626 control = (1UL << 1UL) | (1UL << 0UL);
627 upa_writeq(control, strbuf->strbuf_control);
629 /* Clear out the tags using diagnostics. */
630 for (i = 0; i < 16; i++) {
631 unsigned long ptag, ltag;
633 ptag = strbuf->strbuf_control +
634 (STRBUF_PTAGDIAG - STRBUF_CONTROL);
635 ltag = strbuf->strbuf_control +
636 (STRBUF_LTAGDIAG - STRBUF_CONTROL);
637 ptag += (unsigned long)i * 8UL;
638 ltag += (unsigned long)i * 8UL;
640 upa_writeq(0UL, ptag);
641 upa_writeq(0UL, ltag);
644 /* Enable DVMA arbitration for all devices/slots. */
645 control = upa_readq(iommu->write_complete_reg);
647 upa_writeq(control, iommu->write_complete_reg);
649 /* Now some Xfire specific grot... */
650 if (this_is_starfire)
651 starfire_hookup(portid);
653 sysio_register_error_handlers(op);
657 prom_printf("sbus_iommu_init: Fatal memory allocation error.\n");
660 static int __init sbus_init(void)
662 struct device_node *dp;
664 for_each_node_by_name(dp, "sbus") {
665 struct of_device *op = of_find_device_by_node(dp);
668 of_propagate_archdata(op);
674 subsys_initcall(sbus_init);