/* * sbus.c: UltraSparc SBUS controller support. * * Copyright (C) 1999 David S. Miller (davem@redhat.com) */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "iommu_common.h" #define MAP_BASE ((u32)0xc0000000) /* Offsets from iommu_regs */ #define SYSIO_IOMMUREG_BASE 0x2400UL #define IOMMU_CONTROL (0x2400UL - 0x2400UL) /* IOMMU control register */ #define IOMMU_TSBBASE (0x2408UL - 0x2400UL) /* TSB base address register */ #define IOMMU_FLUSH (0x2410UL - 0x2400UL) /* IOMMU flush register */ #define IOMMU_VADIAG (0x4400UL - 0x2400UL) /* SBUS virtual address diagnostic */ #define IOMMU_TAGCMP (0x4408UL - 0x2400UL) /* TLB tag compare diagnostics */ #define IOMMU_LRUDIAG (0x4500UL - 0x2400UL) /* IOMMU LRU queue diagnostics */ #define IOMMU_TAGDIAG (0x4580UL - 0x2400UL) /* TLB tag diagnostics */ #define IOMMU_DRAMDIAG (0x4600UL - 0x2400UL) /* TLB data RAM diagnostics */ #define IOMMU_DRAM_VALID (1UL << 30UL) /* Offsets from strbuf_regs */ #define SYSIO_STRBUFREG_BASE 0x2800UL #define STRBUF_CONTROL (0x2800UL - 0x2800UL) /* Control */ #define STRBUF_PFLUSH (0x2808UL - 0x2800UL) /* Page flush/invalidate */ #define STRBUF_FSYNC (0x2810UL - 0x2800UL) /* Flush synchronization */ #define STRBUF_DRAMDIAG (0x5000UL - 0x2800UL) /* data RAM diagnostic */ #define STRBUF_ERRDIAG (0x5400UL - 0x2800UL) /* error status diagnostics */ #define STRBUF_PTAGDIAG (0x5800UL - 0x2800UL) /* Page tag diagnostics */ #define STRBUF_LTAGDIAG (0x5900UL - 0x2800UL) /* Line tag diagnostics */ #define STRBUF_TAG_VALID 0x02UL /* Enable 64-bit DVMA mode for the given device. */ void sbus_set_sbus64(struct device *dev, int bursts) { struct iommu *iommu = dev->archdata.iommu; struct of_device *op = to_of_device(dev); const struct linux_prom_registers *regs; unsigned long cfg_reg; int slot; u64 val; regs = of_get_property(op->node, "reg", NULL); if (!regs) { printk(KERN_ERR "sbus_set_sbus64: Cannot find regs for %s\n", op->node->full_name); return; } slot = regs->which_io; cfg_reg = iommu->write_complete_reg; switch (slot) { case 0: cfg_reg += 0x20UL; break; case 1: cfg_reg += 0x28UL; break; case 2: cfg_reg += 0x30UL; break; case 3: cfg_reg += 0x38UL; break; case 13: cfg_reg += 0x40UL; break; case 14: cfg_reg += 0x48UL; break; case 15: cfg_reg += 0x50UL; break; default: return; }; val = upa_readq(cfg_reg); if (val & (1UL << 14UL)) { /* Extended transfer mode already enabled. */ return; } val |= (1UL << 14UL); if (bursts & DMA_BURST8) val |= (1UL << 1UL); if (bursts & DMA_BURST16) val |= (1UL << 2UL); if (bursts & DMA_BURST32) val |= (1UL << 3UL); if (bursts & DMA_BURST64) val |= (1UL << 4UL); upa_writeq(val, cfg_reg); } EXPORT_SYMBOL(sbus_set_sbus64); /* INO number to IMAP register offset for SYSIO external IRQ's. * This should conform to both Sunfire/Wildfire server and Fusion * desktop designs. */ #define SYSIO_IMAP_SLOT0 0x2c00UL #define SYSIO_IMAP_SLOT1 0x2c08UL #define SYSIO_IMAP_SLOT2 0x2c10UL #define SYSIO_IMAP_SLOT3 0x2c18UL #define SYSIO_IMAP_SCSI 0x3000UL #define SYSIO_IMAP_ETH 0x3008UL #define SYSIO_IMAP_BPP 0x3010UL #define SYSIO_IMAP_AUDIO 0x3018UL #define SYSIO_IMAP_PFAIL 0x3020UL #define SYSIO_IMAP_KMS 0x3028UL #define SYSIO_IMAP_FLPY 0x3030UL #define SYSIO_IMAP_SHW 0x3038UL #define SYSIO_IMAP_KBD 0x3040UL #define SYSIO_IMAP_MS 0x3048UL #define SYSIO_IMAP_SER 0x3050UL #define SYSIO_IMAP_TIM0 0x3060UL #define SYSIO_IMAP_TIM1 0x3068UL #define SYSIO_IMAP_UE 0x3070UL #define SYSIO_IMAP_CE 0x3078UL #define SYSIO_IMAP_SBERR 0x3080UL #define SYSIO_IMAP_PMGMT 0x3088UL #define SYSIO_IMAP_GFX 0x3090UL #define SYSIO_IMAP_EUPA 0x3098UL #define bogon ((unsigned long) -1) static unsigned long sysio_irq_offsets[] = { /* SBUS Slot 0 --> 3, level 1 --> 7 */ SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT0, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT1, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT2, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, SYSIO_IMAP_SLOT3, /* Onboard devices (not relevant/used on SunFire). */ SYSIO_IMAP_SCSI, SYSIO_IMAP_ETH, SYSIO_IMAP_BPP, bogon, SYSIO_IMAP_AUDIO, SYSIO_IMAP_PFAIL, bogon, bogon, SYSIO_IMAP_KMS, SYSIO_IMAP_FLPY, SYSIO_IMAP_SHW, SYSIO_IMAP_KBD, SYSIO_IMAP_MS, SYSIO_IMAP_SER, bogon, bogon, SYSIO_IMAP_TIM0, SYSIO_IMAP_TIM1, bogon, bogon, SYSIO_IMAP_UE, SYSIO_IMAP_CE, SYSIO_IMAP_SBERR, SYSIO_IMAP_PMGMT, }; #undef bogon #define NUM_SYSIO_OFFSETS ARRAY_SIZE(sysio_irq_offsets) /* Convert Interrupt Mapping register pointer to associated * Interrupt Clear register pointer, SYSIO specific version. */ #define SYSIO_ICLR_UNUSED0 0x3400UL #define SYSIO_ICLR_SLOT0 0x3408UL #define SYSIO_ICLR_SLOT1 0x3448UL #define SYSIO_ICLR_SLOT2 0x3488UL #define SYSIO_ICLR_SLOT3 0x34c8UL static unsigned long sysio_imap_to_iclr(unsigned long imap) { unsigned long diff = SYSIO_ICLR_UNUSED0 - SYSIO_IMAP_SLOT0; return imap + diff; } static unsigned int sbus_build_irq(struct of_device *op, unsigned int ino) { struct iommu *iommu = op->dev.archdata.iommu; unsigned long reg_base = iommu->write_complete_reg - 0x2000UL; unsigned long imap, iclr; int sbus_level = 0; imap = sysio_irq_offsets[ino]; if (imap == ((unsigned long)-1)) { prom_printf("get_irq_translations: Bad SYSIO INO[%x]\n", ino); prom_halt(); } imap += reg_base; /* SYSIO inconsistency. For external SLOTS, we have to select * the right ICLR register based upon the lower SBUS irq level * bits. */ if (ino >= 0x20) { iclr = sysio_imap_to_iclr(imap); } else { int sbus_slot = (ino & 0x18)>>3; sbus_level = ino & 0x7; switch(sbus_slot) { case 0: iclr = reg_base + SYSIO_ICLR_SLOT0; break; case 1: iclr = reg_base + SYSIO_ICLR_SLOT1; break; case 2: iclr = reg_base + SYSIO_ICLR_SLOT2; break; default: case 3: iclr = reg_base + SYSIO_ICLR_SLOT3; break; }; iclr += ((unsigned long)sbus_level - 1UL) * 8UL; } return build_irq(sbus_level, iclr, imap); } /* Error interrupt handling. */ #define SYSIO_UE_AFSR 0x0030UL #define SYSIO_UE_AFAR 0x0038UL #define SYSIO_UEAFSR_PPIO 0x8000000000000000UL /* Primary PIO cause */ #define SYSIO_UEAFSR_PDRD 0x4000000000000000UL /* Primary DVMA read cause */ #define SYSIO_UEAFSR_PDWR 0x2000000000000000UL /* Primary DVMA write cause */ #define SYSIO_UEAFSR_SPIO 0x1000000000000000UL /* Secondary PIO is cause */ #define SYSIO_UEAFSR_SDRD 0x0800000000000000UL /* Secondary DVMA read cause */ #define SYSIO_UEAFSR_SDWR 0x0400000000000000UL /* Secondary DVMA write cause*/ #define SYSIO_UEAFSR_RESV1 0x03ff000000000000UL /* Reserved */ #define SYSIO_UEAFSR_DOFF 0x0000e00000000000UL /* Doubleword Offset */ #define SYSIO_UEAFSR_SIZE 0x00001c0000000000UL /* Bad transfer size 2^SIZE */ #define SYSIO_UEAFSR_MID 0x000003e000000000UL /* UPA MID causing the fault */ #define SYSIO_UEAFSR_RESV2 0x0000001fffffffffUL /* Reserved */ static irqreturn_t sysio_ue_handler(int irq, void *dev_id) { struct of_device *op = dev_id; struct iommu *iommu = op->dev.archdata.iommu; unsigned long reg_base = iommu->write_complete_reg - 0x2000UL; unsigned long afsr_reg, afar_reg; unsigned long afsr, afar, error_bits; int reported, portid; afsr_reg = reg_base + SYSIO_UE_AFSR; afar_reg = reg_base + SYSIO_UE_AFAR; /* Latch error status. */ afsr = upa_readq(afsr_reg); afar = upa_readq(afar_reg); /* Clear primary/secondary error status bits. */ error_bits = afsr & (SYSIO_UEAFSR_PPIO | SYSIO_UEAFSR_PDRD | SYSIO_UEAFSR_PDWR | SYSIO_UEAFSR_SPIO | SYSIO_UEAFSR_SDRD | SYSIO_UEAFSR_SDWR); upa_writeq(error_bits, afsr_reg); portid = of_getintprop_default(op->node, "portid", -1); /* Log the error. */ printk("SYSIO[%x]: Uncorrectable ECC Error, primary error type[%s]\n", portid, (((error_bits & SYSIO_UEAFSR_PPIO) ? "PIO" : ((error_bits & SYSIO_UEAFSR_PDRD) ? "DVMA Read" : ((error_bits & SYSIO_UEAFSR_PDWR) ? "DVMA Write" : "???"))))); printk("SYSIO[%x]: DOFF[%lx] SIZE[%lx] MID[%lx]\n", portid, (afsr & SYSIO_UEAFSR_DOFF) >> 45UL, (afsr & SYSIO_UEAFSR_SIZE) >> 42UL, (afsr & SYSIO_UEAFSR_MID) >> 37UL); printk("SYSIO[%x]: AFAR[%016lx]\n", portid, afar); printk("SYSIO[%x]: Secondary UE errors [", portid); reported = 0; if (afsr & SYSIO_UEAFSR_SPIO) { reported++; printk("(PIO)"); } if (afsr & SYSIO_UEAFSR_SDRD) { reported++; printk("(DVMA Read)"); } if (afsr & SYSIO_UEAFSR_SDWR) { reported++; printk("(DVMA Write)"); } if (!reported) printk("(none)"); printk("]\n"); return IRQ_HANDLED; } #define SYSIO_CE_AFSR 0x0040UL #define SYSIO_CE_AFAR 0x0048UL #define SYSIO_CEAFSR_PPIO 0x8000000000000000UL /* Primary PIO cause */ #define SYSIO_CEAFSR_PDRD 0x4000000000000000UL /* Primary DVMA read cause */ #define SYSIO_CEAFSR_PDWR 0x2000000000000000UL /* Primary DVMA write cause */ #define SYSIO_CEAFSR_SPIO 0x1000000000000000UL /* Secondary PIO cause */ #define SYSIO_CEAFSR_SDRD 0x0800000000000000UL /* Secondary DVMA read cause */ #define SYSIO_CEAFSR_SDWR 0x0400000000000000UL /* Secondary DVMA write cause*/ #define SYSIO_CEAFSR_RESV1 0x0300000000000000UL /* Reserved */ #define SYSIO_CEAFSR_ESYND 0x00ff000000000000UL /* Syndrome Bits */ #define SYSIO_CEAFSR_DOFF 0x0000e00000000000UL /* Double Offset */ #define SYSIO_CEAFSR_SIZE 0x00001c0000000000UL /* Bad transfer size 2^SIZE */ #define SYSIO_CEAFSR_MID 0x000003e000000000UL /* UPA MID causing the fault */ #define SYSIO_CEAFSR_RESV2 0x0000001fffffffffUL /* Reserved */ static irqreturn_t sysio_ce_handler(int irq, void *dev_id) { struct of_device *op = dev_id; struct iommu *iommu = op->dev.archdata.iommu; unsigned long reg_base = iommu->write_complete_reg - 0x2000UL; unsigned long afsr_reg, afar_reg; unsigned long afsr, afar, error_bits; int reported, portid; afsr_reg = reg_base + SYSIO_CE_AFSR; afar_reg = reg_base + SYSIO_CE_AFAR; /* Latch error status. */ afsr = upa_readq(afsr_reg); afar = upa_readq(afar_reg); /* Clear primary/secondary error status bits. */ error_bits = afsr & (SYSIO_CEAFSR_PPIO | SYSIO_CEAFSR_PDRD | SYSIO_CEAFSR_PDWR | SYSIO_CEAFSR_SPIO | SYSIO_CEAFSR_SDRD | SYSIO_CEAFSR_SDWR); upa_writeq(error_bits, afsr_reg); portid = of_getintprop_default(op->node, "portid", -1); printk("SYSIO[%x]: Correctable ECC Error, primary error type[%s]\n", portid, (((error_bits & SYSIO_CEAFSR_PPIO) ? "PIO" : ((error_bits & SYSIO_CEAFSR_PDRD) ? "DVMA Read" : ((error_bits & SYSIO_CEAFSR_PDWR) ? "DVMA Write" : "???"))))); /* XXX Use syndrome and afar to print out module string just like * XXX UDB CE trap handler does... -DaveM */ printk("SYSIO[%x]: DOFF[%lx] ECC Syndrome[%lx] Size[%lx] MID[%lx]\n", portid, (afsr & SYSIO_CEAFSR_DOFF) >> 45UL, (afsr & SYSIO_CEAFSR_ESYND) >> 48UL, (afsr & SYSIO_CEAFSR_SIZE) >> 42UL, (afsr & SYSIO_CEAFSR_MID) >> 37UL); printk("SYSIO[%x]: AFAR[%016lx]\n", portid, afar); printk("SYSIO[%x]: Secondary CE errors [", portid); reported = 0; if (afsr & SYSIO_CEAFSR_SPIO) { reported++; printk("(PIO)"); } if (afsr & SYSIO_CEAFSR_SDRD) { reported++; printk("(DVMA Read)"); } if (afsr & SYSIO_CEAFSR_SDWR) { reported++; printk("(DVMA Write)"); } if (!reported) printk("(none)"); printk("]\n"); return IRQ_HANDLED; } #define SYSIO_SBUS_AFSR 0x2010UL #define SYSIO_SBUS_AFAR 0x2018UL #define SYSIO_SBAFSR_PLE 0x8000000000000000UL /* Primary Late PIO Error */ #define SYSIO_SBAFSR_PTO 0x4000000000000000UL /* Primary SBUS Timeout */ #define SYSIO_SBAFSR_PBERR 0x2000000000000000UL /* Primary SBUS Error ACK */ #define SYSIO_SBAFSR_SLE 0x1000000000000000UL /* Secondary Late PIO Error */ #define SYSIO_SBAFSR_STO 0x0800000000000000UL /* Secondary SBUS Timeout */ #define SYSIO_SBAFSR_SBERR 0x0400000000000000UL /* Secondary SBUS Error ACK */ #define SYSIO_SBAFSR_RESV1 0x03ff000000000000UL /* Reserved */ #define SYSIO_SBAFSR_RD 0x0000800000000000UL /* Primary was late PIO read */ #define SYSIO_SBAFSR_RESV2 0x0000600000000000UL /* Reserved */ #define SYSIO_SBAFSR_SIZE 0x00001c0000000000UL /* Size of transfer */ #define SYSIO_SBAFSR_MID 0x000003e000000000UL /* MID causing the error */ #define SYSIO_SBAFSR_RESV3 0x0000001fffffffffUL /* Reserved */ static irqreturn_t sysio_sbus_error_handler(int irq, void *dev_id) { struct of_device *op = dev_id; struct iommu *iommu = op->dev.archdata.iommu; unsigned long afsr_reg, afar_reg, reg_base; unsigned long afsr, afar, error_bits; int reported, portid; reg_base = iommu->write_complete_reg - 0x2000UL; afsr_reg = reg_base + SYSIO_SBUS_AFSR; afar_reg = reg_base + SYSIO_SBUS_AFAR; afsr = upa_readq(afsr_reg); afar = upa_readq(afar_reg); /* Clear primary/secondary error status bits. */ error_bits = afsr & (SYSIO_SBAFSR_PLE | SYSIO_SBAFSR_PTO | SYSIO_SBAFSR_PBERR | SYSIO_SBAFSR_SLE | SYSIO_SBAFSR_STO | SYSIO_SBAFSR_SBERR); upa_writeq(error_bits, afsr_reg); portid = of_getintprop_default(op->node, "portid", -1); /* Log the error. */ printk("SYSIO[%x]: SBUS Error, primary error type[%s] read(%d)\n", portid, (((error_bits & SYSIO_SBAFSR_PLE) ? "Late PIO Error" : ((error_bits & SYSIO_SBAFSR_PTO) ? "Time Out" : ((error_bits & SYSIO_SBAFSR_PBERR) ? "Error Ack" : "???")))), (afsr & SYSIO_SBAFSR_RD) ? 1 : 0); printk("SYSIO[%x]: size[%lx] MID[%lx]\n", portid, (afsr & SYSIO_SBAFSR_SIZE) >> 42UL, (afsr & SYSIO_SBAFSR_MID) >> 37UL); printk("SYSIO[%x]: AFAR[%016lx]\n", portid, afar); printk("SYSIO[%x]: Secondary SBUS errors [", portid); reported = 0; if (afsr & SYSIO_SBAFSR_SLE) { reported++; printk("(Late PIO Error)"); } if (afsr & SYSIO_SBAFSR_STO) { reported++; printk("(Time Out)"); } if (afsr & SYSIO_SBAFSR_SBERR) { reported++; printk("(Error Ack)"); } if (!reported) printk("(none)"); printk("]\n"); /* XXX check iommu/strbuf for further error status XXX */ return IRQ_HANDLED; } #define ECC_CONTROL 0x0020UL #define SYSIO_ECNTRL_ECCEN 0x8000000000000000UL /* Enable ECC Checking */ #define SYSIO_ECNTRL_UEEN 0x4000000000000000UL /* Enable UE Interrupts */ #define SYSIO_ECNTRL_CEEN 0x2000000000000000UL /* Enable CE Interrupts */ #define SYSIO_UE_INO 0x34 #define SYSIO_CE_INO 0x35 #define SYSIO_SBUSERR_INO 0x36 static void __init sysio_register_error_handlers(struct of_device *op) { struct iommu *iommu = op->dev.archdata.iommu; unsigned long reg_base = iommu->write_complete_reg - 0x2000UL; unsigned int irq; u64 control; int portid; portid = of_getintprop_default(op->node, "portid", -1); irq = sbus_build_irq(op, SYSIO_UE_INO); if (request_irq(irq, sysio_ue_handler, 0, "SYSIO_UE", op) < 0) { prom_printf("SYSIO[%x]: Cannot register UE interrupt.\n", portid); prom_halt(); } irq = sbus_build_irq(op, SYSIO_CE_INO); if (request_irq(irq, sysio_ce_handler, 0, "SYSIO_CE", op) < 0) { prom_printf("SYSIO[%x]: Cannot register CE interrupt.\n", portid); prom_halt(); } irq = sbus_build_irq(op, SYSIO_SBUSERR_INO); if (request_irq(irq, sysio_sbus_error_handler, 0, "SYSIO_SBERR", op) < 0) { prom_printf("SYSIO[%x]: Cannot register SBUS Error interrupt.\n", portid); prom_halt(); } /* Now turn the error interrupts on and also enable ECC checking. */ upa_writeq((SYSIO_ECNTRL_ECCEN | SYSIO_ECNTRL_UEEN | SYSIO_ECNTRL_CEEN), reg_base + ECC_CONTROL); control = upa_readq(iommu->write_complete_reg); control |= 0x100UL; /* SBUS Error Interrupt Enable */ upa_writeq(control, iommu->write_complete_reg); } /* Boot time initialization. */ static void __init sbus_iommu_init(struct of_device *op) { const struct linux_prom64_registers *pr; struct device_node *dp = op->node; struct iommu *iommu; struct strbuf *strbuf; unsigned long regs, reg_base; int i, portid; u64 control; pr = of_get_property(dp, "reg", NULL); if (!pr) { prom_printf("sbus_iommu_init: Cannot map SYSIO " "control registers.\n"); prom_halt(); } regs = pr->phys_addr; iommu = kzalloc(sizeof(*iommu), GFP_ATOMIC); if (!iommu) goto fatal_memory_error; strbuf = kzalloc(sizeof(*strbuf), GFP_ATOMIC); if (!strbuf) goto fatal_memory_error; op->dev.archdata.iommu = iommu; op->dev.archdata.stc = strbuf; op->dev.archdata.numa_node = -1; reg_base = regs + SYSIO_IOMMUREG_BASE; iommu->iommu_control = reg_base + IOMMU_CONTROL; iommu->iommu_tsbbase = reg_base + IOMMU_TSBBASE; iommu->iommu_flush = reg_base + IOMMU_FLUSH; iommu->iommu_tags = iommu->iommu_control + (IOMMU_TAGDIAG - IOMMU_CONTROL); reg_base = regs + SYSIO_STRBUFREG_BASE; strbuf->strbuf_control = reg_base + STRBUF_CONTROL; strbuf->strbuf_pflush = reg_base + STRBUF_PFLUSH; strbuf->strbuf_fsync = reg_base + STRBUF_FSYNC; strbuf->strbuf_enabled = 1; strbuf->strbuf_flushflag = (volatile unsigned long *) ((((unsigned long)&strbuf->__flushflag_buf[0]) + 63UL) & ~63UL); strbuf->strbuf_flushflag_pa = (unsigned long) __pa(strbuf->strbuf_flushflag); /* The SYSIO SBUS control register is used for dummy reads * in order to ensure write completion. */ iommu->write_complete_reg = regs + 0x2000UL; portid = of_getintprop_default(op->node, "portid", -1); printk(KERN_INFO "SYSIO: UPA portID %x, at %016lx\n", portid, regs); /* Setup for TSB_SIZE=7, TBW_SIZE=0, MMU_DE=1, MMU_EN=1 */ if (iommu_table_init(iommu, IO_TSB_SIZE, MAP_BASE, 0xffffffff, -1)) goto fatal_memory_error; control = upa_readq(iommu->iommu_control); control = ((7UL << 16UL) | (0UL << 2UL) | (1UL << 1UL) | (1UL << 0UL)); upa_writeq(control, iommu->iommu_control); /* Clean out any cruft in the IOMMU using * diagnostic accesses. */ for (i = 0; i < 16; i++) { unsigned long dram, tag; dram = iommu->iommu_control + (IOMMU_DRAMDIAG - IOMMU_CONTROL); tag = iommu->iommu_control + (IOMMU_TAGDIAG - IOMMU_CONTROL); dram += (unsigned long)i * 8UL; tag += (unsigned long)i * 8UL; upa_writeq(0, dram); upa_writeq(0, tag); } upa_readq(iommu->write_complete_reg); /* Give the TSB to SYSIO. */ upa_writeq(__pa(iommu->page_table), iommu->iommu_tsbbase); /* Setup streaming buffer, DE=1 SB_EN=1 */ control = (1UL << 1UL) | (1UL << 0UL); upa_writeq(control, strbuf->strbuf_control); /* Clear out the tags using diagnostics. */ for (i = 0; i < 16; i++) { unsigned long ptag, ltag; ptag = strbuf->strbuf_control + (STRBUF_PTAGDIAG - STRBUF_CONTROL); ltag = strbuf->strbuf_control + (STRBUF_LTAGDIAG - STRBUF_CONTROL); ptag += (unsigned long)i * 8UL; ltag += (unsigned long)i * 8UL; upa_writeq(0UL, ptag); upa_writeq(0UL, ltag); } /* Enable DVMA arbitration for all devices/slots. */ control = upa_readq(iommu->write_complete_reg); control |= 0x3fUL; upa_writeq(control, iommu->write_complete_reg); /* Now some Xfire specific grot... */ if (this_is_starfire) starfire_hookup(portid); sysio_register_error_handlers(op); return; fatal_memory_error: prom_printf("sbus_iommu_init: Fatal memory allocation error.\n"); } static int __init sbus_init(void) { struct device_node *dp; for_each_node_by_name(dp, "sbus") { struct of_device *op = of_find_device_by_node(dp); sbus_iommu_init(op); of_propagate_archdata(op); } return 0; } subsys_initcall(sbus_init);