/* $OpenBSD: macebus.c,v 1.18 2006/01/04 20:23:07 miod Exp $ */ /* * Copyright (c) 2000-2004 Opsycon AB (www.opsycon.se) * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * */ /* * This is a combined macebus/crimebus driver. It handles * configuration of all devices on the processor bus. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include int macebusmatch(struct device *, void *, void *); void macebusattach(struct device *, struct device *, void *); int macebusprint(void *, const char *); int macebusscan(struct device *, void *, void *); void *macebus_intr_establish(void *, u_long, int, int, int (*)(void *), void *, char *); void macebus_intr_disestablish(void *, void *); void macebus_intr_makemasks(void); void macebus_do_pending_int(int); intrmask_t macebus_iointr(intrmask_t, struct trap_frame *); intrmask_t macebus_aux(intrmask_t, struct trap_frame *); int maceticks; /* Time tracker for special events */ struct cfattach macebus_ca = { sizeof(struct device), macebusmatch, macebusattach }; struct cfdriver macebus_cd = { NULL, "macebus", DV_DULL, 1 }; bus_space_t macebus_tag = { NULL, (bus_addr_t)MACEBUS_BASE, NULL, 0, mace_read_1, mace_write_1, mace_read_2, mace_write_2, mace_read_4, mace_write_4, mace_read_8, mace_write_8, mace_space_map, mace_space_unmap, mace_space_region, }; bus_space_t crimebus_tag = { NULL, (bus_addr_t)CRIMEBUS_BASE, NULL, 0, mace_read_1, mace_write_1, mace_read_2, mace_write_2, mace_read_4, mace_write_4, mace_read_8, mace_write_8, mace_space_map, mace_space_unmap, mace_space_region, }; bus_space_handle_t crime_h; bus_space_handle_t mace_h; struct machine_bus_dma_tag mace_bus_dma_tag = { NULL, /* _cookie */ _dmamap_create, _dmamap_destroy, _dmamap_load, _dmamap_load_mbuf, _dmamap_load_uio, _dmamap_load_raw, _dmamap_unload, _dmamap_sync, _dmamem_alloc, _dmamem_free, _dmamem_map, _dmamem_unmap, _dmamem_mmap, NULL }; /* * Match bus only to targets which have this bus. */ int macebusmatch(struct device *parent, void *match, void *aux) { if (sys_config.system_type == SGI_O2) return (1); return (0); } int macebusprint(void *aux, const char *macebus) { /* XXXX print flags */ return (QUIET); } int macebusscan(struct device *parent, void *child, void *args) { struct device *dev = child; struct cfdata *cf = dev->dv_cfdata; struct confargs lba; struct abus lbus; if (cf->cf_fstate == FSTATE_STAR) { printf("macebus '*' devs not allowed!\n"); return 0; } lba.ca_sys = cf->cf_loc[0]; if (cf->cf_loc[1] == -1) { lba.ca_baseaddr = 0; } else { lba.ca_baseaddr = cf->cf_loc[1]; } if (cf->cf_loc[2] == -1) { lba.ca_intr = 0; lba.ca_nintr = 0; } else { lba.ca_intr = cf->cf_loc[2]; lba.ca_nintr = 1; } lba.ca_bus = &lbus; /* Fill in what is needed for probing */ lba.ca_bus->ab_type = BUS_LOCAL; lba.ca_bus->ab_matchname = NULL; lba.ca_name = cf->cf_driver->cd_name; lba.ca_num = dev->dv_unit; lba.ca_iot = &macebus_tag; lba.ca_memt = &macebus_tag; lba.ca_dmat = &mace_bus_dma_tag; return (*cf->cf_attach->ca_match)(parent, cf, &lba); } void macebusattach(struct device *parent, struct device *self, void *aux) { struct device *dev; struct confargs lba; struct abus lbus; u_int32_t creg; u_int64_t mask; /* * Create an extent for the localbus control registers. */ macebus_tag.bus_extent = extent_create("mace_space", macebus_tag.bus_base, macebus_tag.bus_base + 0x00400000, M_DEVBUF, NULL, 0, EX_NOCOALESCE | EX_NOWAIT); crimebus_tag.bus_extent = extent_create("crime_space", crimebus_tag.bus_base, crimebus_tag.bus_base + 0x00400000, M_DEVBUF, NULL, 0, EX_NOCOALESCE | EX_NOWAIT); /* * Map and set up CRIME control registers. */ if (bus_space_map(&crimebus_tag, 0x00000000, 0x400, 0, &crime_h)) { printf(": cannot map CRIME control registers\n"); return; } hwmask_addr = (void *)(PHYS_TO_KSEG1(CRIMEBUS_BASE)+CRIME_INT_MASK); creg = bus_space_read_8(&crimebus_tag, crime_h, CRIME_REVISION); printf(": crime rev %d.%d\n", (creg & 0xf0) >> 4, creg & 0xf); bus_space_write_8(&crimebus_tag, crime_h, CRIME_CPU_ERROR_STAT, 0); bus_space_write_8(&crimebus_tag, crime_h, CRIME_MEM_ERROR_STAT, 0); mask = 0; bus_space_write_8(&crimebus_tag, crime_h, CRIME_INT_MASK, mask); bus_space_write_8(&crimebus_tag, crime_h, CRIME_INT_SOFT, 0); bus_space_write_8(&crimebus_tag, crime_h, CRIME_INT_HARD, 0); bus_space_write_8(&crimebus_tag, crime_h, CRIME_INT_STAT, 0); /* * Map and set up MACE ISA control registers. */ if (bus_space_map(&macebus_tag, MACE_ISA_OFFS, 0x400, 0, &mace_h)) { printf("UH-OH! Can't map MACE ISA control registers!\n"); return; } bus_space_write_8(&macebus_tag, mace_h, MACE_ISA_INT_MASK, 0xffffffff); bus_space_write_8(&macebus_tag, mace_h, MACE_ISA_INT_STAT, 0); /* * Now attach all devices to macebus in proper order. */ memset(&lba, 0, sizeof(lba)); memset(&lbus, 0, sizeof(lbus)); lba.ca_bus = &lbus; lba.ca_bus->ab_type = BUS_LOCAL; lba.ca_bus->ab_matchname = NULL; lba.ca_iot = &macebus_tag; lba.ca_memt = &macebus_tag; lba.ca_dmat = &mace_bus_dma_tag; /* * On O2 systems all interrupts are handled by the * macebus interrupt handler. Register all except clock. */ switch (sys_config.system_type) { case SGI_O2: set_intr(INTPRI_MACEIO, CR_INT_0, macebus_iointr); lba.ca_bus->ab_intr_establish = macebus_intr_establish; lba.ca_bus->ab_intr_disestablish = macebus_intr_disestablish; register_pending_int_handler(macebus_do_pending_int); break; default: panic("macebusscan: unknown macebus type!"); } /* DEBUG: Set up a handler called when clock interrupts go off. */ set_intr(INTPRI_MACEAUX, CR_INT_5, macebus_aux); while ((dev = config_search(macebusscan, self, aux)) != NULL) { struct cfdata *cf; cf = dev->dv_cfdata; lba.ca_sys = cf->cf_loc[0]; if (cf->cf_loc[1] == -1) lba.ca_baseaddr = 0; else lba.ca_baseaddr = cf->cf_loc[1]; if (cf->cf_loc[2] == -1) { lba.ca_intr = 0; lba.ca_nintr = 0; } else { lba.ca_intr= cf->cf_loc[2]; lba.ca_nintr = 1; } lba.ca_name = cf->cf_driver->cd_name; lba.ca_num = dev->dv_unit; config_attach(self, dev, &lba, macebusprint); } } /* * Bus access primitives. These are really ugly... */ u_int8_t mace_read_1(bus_space_tag_t t, bus_space_handle_t h, bus_size_t o) { return *(volatile u_int8_t *)(h + (o << 8) + 7); } u_int16_t mace_read_2(bus_space_tag_t t, bus_space_handle_t h, bus_size_t o) { panic("mace_read_2"); } u_int32_t mace_read_4(bus_space_tag_t t, bus_space_handle_t h, bus_size_t o) { return *(volatile u_int32_t *)(h + o); } u_int64_t mace_read_8(bus_space_tag_t t, bus_space_handle_t h, bus_size_t o) { #ifdef __LP64__ return *(volatile u_int64_t *)(h + o); #else return lp32_read8((u_int64_t *)(h + o)); #endif } void mace_write_1(bus_space_tag_t t, bus_space_handle_t h, bus_size_t o, u_int8_t v) { *(volatile u_int8_t *)(h + (o << 8) + 7) = v; } void mace_write_2(bus_space_tag_t t, bus_space_handle_t h, bus_size_t o, u_int16_t v) { panic("mace_write_2"); } void mace_write_4(bus_space_tag_t t, bus_space_handle_t h, bus_size_t o, u_int32_t v) { *(volatile u_int32_t *)(h + o) = v; } void mace_write_8(bus_space_tag_t t, bus_space_handle_t h, bus_size_t o, u_int64_t v) { #ifdef __LP64__ *(volatile u_int64_t *)(h + o) = v; #else lp32_write8((u_int64_t *)(h + o), v); #endif } extern int extent_malloc_flags; int mace_space_map(bus_space_tag_t t, bus_addr_t offs, bus_size_t size, int cacheable, bus_space_handle_t *bshp) { bus_addr_t bpa; int error; bpa = t->bus_base + offs; /* Handle special mapping separately */ if (bpa >= (MACEBUS_BASE + MACE_ISAX_OFFS) && (bpa + size) < (MACEBUS_BASE + MACE_ISAX_OFFS + MACE_ISAX_SIZE)) { *bshp = PHYS_TO_KSEG1(bpa); return 0; } if ((error = extent_alloc_region(t->bus_extent, bpa, size, EX_NOWAIT | extent_malloc_flags))) { return error; } if ((error = bus_mem_add_mapping(bpa, size, cacheable, bshp))) { if (extent_free(t->bus_extent, bpa, size, EX_NOWAIT | extent_malloc_flags)) { printf("bus_space_map: pa %p, size %p\n", bpa, size); printf("bus_space_map: can't free region\n"); } } return (error); } void mace_space_unmap(bus_space_tag_t t, bus_space_handle_t bsh, bus_size_t size) { bus_addr_t sva, paddr; bus_size_t off, len; /* should this verify that the proper size is freed? */ sva = trunc_page(bsh); off = bsh - sva; len = size+off; paddr = KSEG1_TO_PHYS(bsh); if (paddr >= (MACEBUS_BASE + MACE_ISAX_OFFS) && (paddr+size) <= (MACEBUS_BASE + MACE_ISAX_OFFS + MACE_ISAX_SIZE)) return; if (pmap_extract(pmap_kernel(), bsh, (void *)&paddr) == 0) { printf("bus_space_unmap: no pa for va %p\n", bsh); return; } uvm_km_free(kernel_map, sva, len); if (extent_free(t->bus_extent, paddr, size, EX_NOWAIT | extent_malloc_flags)) { printf("bus_space_map: pa %p, size %p\n", paddr, size); printf("bus_space_map: can't free region\n"); } } int mace_space_region(bus_space_tag_t t, bus_space_handle_t bsh, bus_size_t offset, bus_size_t size, bus_space_handle_t *nbshp) { *nbshp = bsh + offset; return (0); } /* * Macebus interrupt handler driver. */ intrmask_t mace_intem = 0x0; static intrmask_t intrtype[INTMASKSIZE]; static intrmask_t intrmask[INTMASKSIZE]; static intrmask_t intrlevel[INTMASKSIZE]; static int fakeintr(void *); static int fakeintr(void *a) {return 0;} /* * Establish an interrupt handler called from the dispatcher. * The interrupt function established should return zero if * there was nothing to serve (no int) and non zero when an * interrupt was serviced. * Interrupts are numbered from 1 and up where 1 maps to HW int 0. */ void * macebus_intr_establish(void *icp, u_long irq, int type, int level, int (*ih_fun)(void *), void *ih_arg, char *ih_what) { struct intrhand **p, *q, *ih; static struct intrhand fakehand = {NULL, fakeintr}; int edge; extern int cold; static int initialized = 0; if (!initialized) { /*INIT CODE HERE*/ initialized = 1; } if (irq > 62 || irq < 1) { panic("intr_establish: illegal irq %d", irq); } irq -= 1; /* Adjust for 1 being first (0 is no int) */ /* no point in sleeping unless someone can free memory. */ ih = malloc(sizeof *ih, M_DEVBUF, cold ? M_NOWAIT : M_WAITOK); if (ih == NULL) panic("intr_establish: can't malloc handler info"); if (type == IST_NONE || type == IST_PULSE) panic("intr_establish: bogus type"); switch (intrtype[irq]) { case IST_EDGE: case IST_LEVEL: if (type == intrtype[irq]) break; } switch (type) { case IST_EDGE: edge |= 1 << irq; break; case IST_LEVEL: edge &= ~(1 << irq); break; } /* * Figure out where to put the handler. * This is O(N^2), but we want to preserve the order, and N is * generally small. */ for (p = &intrhand[irq]; (q = *p) != NULL; p = &q->ih_next) ; /* * Actually install a fake handler momentarily, since we might be doing * this with interrupts enabled and don't want the real routine called * until masking is set up. */ fakehand.ih_level = level; *p = &fakehand; macebus_intr_makemasks(); /* * Poke the real handler in now. */ ih->ih_fun = ih_fun; ih->ih_arg = ih_arg; ih->ih_next = NULL; ih->ih_level = level; ih->ih_irq = irq; ih->ih_what = ih_what; evcount_attach(&ih->ih_count, ih_what, (void *)&ih->ih_irq, &evcount_intr); *p = ih; return (ih); } void macebus_intr_disestablish(void *p1, void *p2) { } /* * Regenerate interrupt masks to reflect reality. */ void macebus_intr_makemasks(void) { int irq, level; struct intrhand *q; /* First, figure out which levels each IRQ uses. */ for (irq = 0; irq < INTMASKSIZE; irq++) { int levels = 0; for (q = intrhand[irq]; q; q = q->ih_next) levels |= 1 << q->ih_level; intrlevel[irq] = levels; } /* Then figure out which IRQs use each level. */ for (level = 0; level < 5; level++) { int irqs = 0; for (irq = 0; irq < INTMASKSIZE; irq++) if (intrlevel[irq] & (1 << level)) irqs |= 1 << irq; imask[level] = irqs | SINT_ALLMASK; } /* * There are tty, network and disk drivers that use free() at interrupt * time, so imp > (tty | net | bio). */ imask[IPL_VM] |= imask[IPL_TTY] | imask[IPL_NET] | imask[IPL_BIO]; /* * Enforce a hierarchy that gives slow devices a better chance at not * dropping data. */ imask[IPL_TTY] |= imask[IPL_NET] | imask[IPL_BIO]; imask[IPL_NET] |= imask[IPL_BIO]; /* * These are pseudo-levels. */ imask[IPL_NONE] = 0; imask[IPL_HIGH] = -1; /* And eventually calculate the complete masks. */ for (irq = 0; irq < INTMASKSIZE; irq++) { int irqs = 1 << irq; for (q = intrhand[irq]; q; q = q->ih_next) irqs |= imask[q->ih_level]; intrmask[irq] = irqs | SINT_ALLMASK; } /* Lastly, determine which IRQs are actually in use. */ irq = 0; for (level = 0; level < INTMASKSIZE; level++) { if (intrhand[level]) { irq |= 1 << level; } } mace_intem = irq & 0x0000ffff; hw_setintrmask(0); } void macebus_do_pending_int(int newcpl) { #ifdef _USE_SILLY_OVERWORKED_HW_INT_PENDING_HANDLER_ struct intrhand *ih; int vector; intrmask_t hwpend; struct trap_frame cf; static volatile int processing; /* Don't recurse... but change the mask */ if (processing) { cpl = newcpl; return; } processing = 1; /* XXX Fake a trapframe for clock pendings... */ cf.pc = (int)&macebus_do_pending_int; cf.sr = 0; cf.cpl = cpl; /* Hard mask current cpl so we don't get any new pendings */ hw_setintrmask(cpl); /* Get what interrupt we should process */ hwpend = ipending & ~newcpl; hwpend &= ~SINT_ALLMASK; clr_ipending(hwpend); /* Enable all non pending non masked hardware interrupts */ cpl = (cpl & SINT_ALLMASK) | (newcpl & ~SINT_ALLMASK) | hwpend; hw_setintrmask(cpl); while (hwpend) { vector = ffs(hwpend) - 1; hwpend &= ~(1L << vector); ih = intrhand[vector]; while (ih) { ih->frame = &cf; if ((*ih->ih_fun)(ih->ih_arg)) { ih->ih_count.ec_count++; } ih = ih->ih_next; } } /* Enable all processed pending hardware interrupts */ cpl &= ~hwpend; hw_setintrmask(cpl); if ((ipending & SINT_CLOCKMASK) & ~newcpl) { clr_ipending(SINT_CLOCKMASK); softclock(); } if ((ipending & SINT_NETMASK) & ~newcpl) { extern int netisr; int isr = netisr; netisr = 0; clr_ipending(SINT_NETMASK); #define DONETISR(b,f) if (isr & (1 << (b))) f(); #include } #ifdef NOTYET if ((ipending & SINT_TTYMASK) & ~newcpl) { clr_ipending(SINT_TTYMASK); compoll(NULL); } #endif /* Update masks to new cpl. Order highly important! */ cpl = newcpl; hw_setintrmask(newcpl); processing = 0; #else /* Update masks to new cpl. Order highly important! */ cpl = newcpl; hw_setintrmask(newcpl); /* If we still have softints pending trigg processing */ if (ipending & SINT_ALLMASK & ~cpl) setsoftintr0(); #endif } /* * Process interrupts. The parameter pending has non-masked interrupts. */ intrmask_t macebus_iointr(intrmask_t hwpend, struct trap_frame *cf) { struct intrhand *ih; intrmask_t caught, vm; int v; intrmask_t pending; u_int64_t intstat, isastat, mask; intstat = bus_space_read_8(&crimebus_tag, crime_h, CRIME_INT_STAT); intstat &= 0xffff; isastat = bus_space_read_8(&macebus_tag, mace_h, MACE_ISA_INT_STAT); caught = 0; /* Mask off masked interrupts and save them as pending */ if (intstat & cf->cpl) { set_ipending(intstat & cf->cpl); mask = bus_space_read_8(&crimebus_tag, crime_h, CRIME_INT_MASK); mask &= ~ipending; bus_space_write_8(&crimebus_tag, crime_h, CRIME_INT_MASK, mask); caught++; } /* Scan all unmasked. Scan the first 16 for now */ pending = intstat & ~cf->cpl; clr_ipending(pending); for (v = 0, vm = 1; pending != 0 && v < 16 ; v++, vm <<= 1) { if (pending & vm) { ih = intrhand[v]; while (ih) { ih->frame = cf; if ((*ih->ih_fun)(ih->ih_arg)) { caught |= vm; ih->ih_count.ec_count++; } ih = ih->ih_next; } } } if (caught) return CR_INT_0; return 0; /* Non found here */ } /* * Macebus auxilary functions run each clock interrupt. */ intrmask_t macebus_aux(intrmask_t hwpend, struct trap_frame *cf) { extern char idle[], e_idle[]; u_int64_t mask; mask = bus_space_read_8(&macebus_tag, mace_h, MACE_ISA_MISC_REG); mask |= MACE_ISA_MISC_RLED_OFF | MACE_ISA_MISC_GLED_OFF; /* GREEN - User mode */ /* AMBER - System mode */ /* RED - IDLE */ if (cf->sr & SR_KSU_USER) { mask &= ~MACE_ISA_MISC_GLED_OFF; } else if (cf->pc >= (long)idle && cf->pc < (long)e_idle) { mask &= ~MACE_ISA_MISC_RLED_OFF; } else { mask &= ~(MACE_ISA_MISC_RLED_OFF | MACE_ISA_MISC_GLED_OFF); } bus_space_write_8(&macebus_tag, mace_h, MACE_ISA_MISC_REG, mask); if (maceticks++ > 100*5) { maceticks = 0; } return 0; /* Real clock int handler registers */ }