/* $NetBSD: ofwoea_machdep.c,v 1.62 2021/12/05 07:13:48 msaitoh Exp $ */ /*- * Copyright (c) 2007 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Tim Rightnour * * 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``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 FOUNDATION OR CONTRIBUTORS * 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. */ #include __KERNEL_RCSID(0, "$NetBSD: ofwoea_machdep.c,v 1.62 2021/12/05 07:13:48 msaitoh Exp $"); #include "ksyms.h" #include "wsdisplay.h" #ifdef _KERNEL_OPT #include "opt_ddb.h" #include "opt_kgdb.h" #include "opt_modular.h" #include "opt_multiprocessor.h" #include "opt_oea.h" #include "opt_ofwoea.h" #include "opt_ppcarch.h" #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef DDB #include #include #endif #ifdef KGDB #include #endif #ifdef ofppc extern struct model_data modeldata; #endif #ifdef OFWOEA_DEBUG #define DPRINTF printf #else #define DPRINTF while (0) printf #endif typedef struct _rangemap { u_int32_t addr; u_int32_t size; int type; } rangemap_t; struct OF_translation ofw_translations[OFW_MAX_TRANSLATIONS]; /* * Data structures holding OpenFirmware's translations when running * in virtual-mode. * * When we call into OpenFirmware, we point the calling CPU's * cpu_info::ci_battable at ofw_battable[]. For now, this table * is empty, which will ensure that any DSI exceptions that occur * during the firmware call will not erroneously load kernel BAT * mappings that could clobber the firmware's translations. */ struct pmap ofw_pmap; struct bat ofw_battable[BAT_VA2IDX(0xffffffff)+1]; char bootpath[256]; char model_name[64]; #if NKSYMS || defined(DDB) || defined(MODULAR) void *startsym, *endsym; #endif #if PPC_OEA601 #define TIMEBASE_FREQ (1000000000) /* RTC register */ #endif #ifdef TIMEBASE_FREQ u_int timebase_freq = TIMEBASE_FREQ; #else u_int timebase_freq = 0; #endif int ofw_quiesce; extern int ofwmsr; extern uint32_t ticks_per_sec; extern uint32_t ns_per_tick; extern uint32_t ticks_per_intr; static void get_timebase_frequency(void); static void init_decrementer(void); static void restore_ofmap(void); void ofwoea_initppc(u_int startkernel, u_int endkernel, char *args) { register_t scratch; #if NKSYMS || defined(DDB) || defined(MODULAR) /* get info of kernel symbol table from bootloader */ memcpy(&startsym, args + strlen(args) + 1, sizeof(startsym)); memcpy(&endsym, args + strlen(args) + 1 + sizeof(startsym), sizeof(endsym)); if (startsym == NULL || endsym == NULL) startsym = endsym = NULL; #endif /* Parse the args string */ if (args) { strcpy(bootpath, args); args = bootpath; while (*++args && *args != ' '); if (*args) { *args++ = 0; while (*args) BOOT_FLAG(*args++, boothowto); } } else { int chs = OF_finddevice("/chosen"); int len; len = OF_getprop(chs, "bootpath", bootpath, sizeof(bootpath) - 1); if (len > -1) bootpath[len] = 0; } /* Get the timebase frequency from the firmware. */ get_timebase_frequency(); /* Probe for the console device; it's initialized later. */ ofwoea_cnprobe(); if (ofw_quiesce) OF_quiesce(); oea_init(pic_ext_intr); /* * Now that we've installed our own exception vectors, * ensure that exceptions that happen while running * firmware code fall into ours. */ ofwmsr &= ~PSL_IP; /* Initialize bus_space */ ofwoea_bus_space_init(); /* Initialize the console device. */ ofwoea_consinit(); uvm_md_init(); pmap_bootstrap(startkernel, endkernel); /* as far as I can tell, the pmap_setup_seg0 stuff is horribly broken */ #if defined(PPC_OEA64) || defined (PPC_OEA64_BRIDGE) #if defined (PMAC_G5) /* Mapin 1st 256MB segment 1:1, also map in mem needed to access OFW*/ if (oeacpufeat & OEACPU_64_BRIDGE) { vaddr_t va; paddr_t pa; vsize_t size; int i; pmap_setup_segment0_map(0, msgbuf_paddr, msgbuf_paddr, round_page(MSGBUFSIZE), 0x0); /* Map OFW code+data */ for (i = 0; i < __arraycount(ofw_translations); i++) { va = ofw_translations[i].virt; size = ofw_translations[i].size; pa = ofw_translations[i].phys; /* XXX mode */ if (size == 0) { /* No more, all done! */ break; } if (va < 0xff800000) continue; for (; va < (ofw_translations[i].virt + size); va += PAGE_SIZE, pa += PAGE_SIZE) { pmap_enter(pmap_kernel(), va, pa, VM_PROT_ALL, VM_PROT_ALL | PMAP_WIRED); } } #if NWSDISPLAY > 0 /* Map video frame buffer */ struct rasops_info *ri = &rascons_console_screen.scr_ri; if (ri->ri_bits != NULL) { for (va = (vaddr_t) ri->ri_bits; va < round_page((vaddr_t) ri->ri_bits + ri->ri_height * ri->ri_stride); va += PAGE_SIZE) { pmap_enter(pmap_kernel(), va, va, VM_PROT_READ | VM_PROT_WRITE, PMAP_NOCACHE | PMAP_WIRED); } } #endif } #elif defined (MAMBO) /* Mapin 1st 256MB segment 1:1, also map in mem needed to access OFW*/ if (oeacpufeat & OEACPU_64_BRIDGE) pmap_setup_segment0_map(0, 0xf4000000, 0xf4000000, 0x1000, 0x0); #endif /* PMAC_G5 */ #endif /* PPC_OEA64 || PPC_OEA64_BRIDGE */ /* Now enable translation (and machine checks/recoverable interrupts) */ __asm __volatile ("sync; mfmsr %0; ori %0,%0,%1; mtmsr %0; isync" : "=r"(scratch) : "K"(PSL_IR|PSL_DR|PSL_ME|PSL_RI)); restore_ofmap(); rascons_finalize(); #if NKSYMS || defined(DDB) || defined(MODULAR) ksyms_addsyms_elf((int)((uintptr_t)endsym - (uintptr_t)startsym), startsym, endsym); #endif /* Kick off the clock. */ init_decrementer(); #ifdef DDB if (boothowto & RB_KDB) Debugger(); #endif } static void get_timebase_frequency(void) { int qhandle, phandle, node; char type[32]; if (timebase_freq != 0) { ticks_per_sec = timebase_freq; return; } node = OF_finddevice("/cpus/@0"); if (node != -1 && OF_getprop(node, "timebase-frequency", &ticks_per_sec, sizeof ticks_per_sec) > 0) { return; } node = OF_finddevice("/"); for (qhandle = node; qhandle; qhandle = phandle) { if (OF_getprop(qhandle, "device_type", type, sizeof type) > 0 && strcmp(type, "cpu") == 0 && OF_getprop(qhandle, "timebase-frequency", &ticks_per_sec, sizeof ticks_per_sec) > 0) { return; } if ((phandle = OF_child(qhandle))) continue; while (qhandle) { if ((phandle = OF_peer(qhandle))) break; qhandle = OF_parent(qhandle); } } panic("no cpu node"); } static void init_decrementer(void) { int scratch, msr; KASSERT(ticks_per_sec != 0); __asm volatile ("mfmsr %0; andi. %1,%0,%2; mtmsr %1" : "=r"(msr), "=r"(scratch) : "K"((u_short)~PSL_EE)); ns_per_tick = 1000000000 / ticks_per_sec; ticks_per_intr = ticks_per_sec / hz; cpu_timebase = ticks_per_sec; #ifdef PPC_OEA601 if ((mfpvr() >> 16) == MPC601) curcpu()->ci_lasttb = rtc_nanosecs(); else #endif curcpu()->ci_lasttb = mftbl(); mtspr(SPR_DEC, ticks_per_intr); mtmsr(msr); } void restore_ofmap(void) { vaddr_t va, size; paddr_t pa; int i; pmap_pinit(&ofw_pmap); #ifndef _LP64 ofw_pmap.pm_sr[0] = KERNELN_SEGMENT(0)|SR_PRKEY; ofw_pmap.pm_sr[KERNEL_SR] = KERNEL_SEGMENT|SR_SUKEY|SR_PRKEY; #ifdef KERNEL2_SR ofw_pmap.pm_sr[KERNEL2_SR] = KERNEL2_SEGMENT|SR_SUKEY|SR_PRKEY; #endif #endif for (i = 0; i < __arraycount(ofw_translations); i++) { va = ofw_translations[i].virt; size = ofw_translations[i].size; pa = ofw_translations[i].phys; /* XXX mode */ if (size == 0) { /* No more, all done! */ break; } if (va < 0xf0000000) /* XXX */ continue; /* * XXX macallan@ * My beige G3 throws a DSI trap if we try to map the last page * of the 32bit address space. On old world macs the firmware * ROM occupies 4MB at 0xffc00000, triggering it when we * restore OF translations. This just works around a bug * elsewhere in pmap and should go away once fixed there. */ if (pa == 0xffc00000 && size == 0x400000) size = 0x3ff000; while (size > 0) { pmap_enter(&ofw_pmap, va, pa, VM_PROT_ALL, VM_PROT_ALL|PMAP_WIRED); pa += PAGE_SIZE; va += PAGE_SIZE; size -= PAGE_SIZE; } } pmap_update(&ofw_pmap); } /* we define these partially, as we will fill the rest in later */ struct powerpc_bus_space genppc_isa_io_space_tag = { .pbs_flags = _BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_IO_TYPE, .pbs_base = 0x00000000, }; struct powerpc_bus_space genppc_isa_mem_space_tag = { .pbs_flags = _BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_MEM_TYPE, .pbs_base = 0x00000000, }; /* This gives us a maximum of 6 PCI busses, assuming both io/mem on each. * Increase if necc. */ static char ex_storage[EXSTORAGE_MAX][EXTENT_FIXED_STORAGE_SIZE(EXTMAP_RANGES)] __attribute__((aligned(8))); static void find_ranges(int base, rangemap_t *regions, int *cur, int type) { int node, i, len, reclen; u_int32_t parent_acells, acells, scells, map[160]; char tmp[32]; node = base; if (OF_getprop(node, "device_type", tmp, sizeof(tmp)) == -1) goto rec; if ((type == RANGE_TYPE_PCI || type == RANGE_TYPE_FIRSTPCI) && strcmp("pci", tmp) != 0) goto rec; if (type == RANGE_TYPE_ISA && strcmp("isa", tmp) != 0) goto rec; if (type == RANGE_TYPE_MACIO && strcmp("memory-controller", tmp) == 0) { len = OF_getprop(node, "reg", map, sizeof(map)); acells = 1; scells = 1; } else { len = OF_getprop(node, "ranges", map, sizeof(map)); } if (len == -1) goto rec; if (OF_getprop(OF_parent(node), "#address-cells", &parent_acells, sizeof(parent_acells)) != sizeof(parent_acells)) parent_acells = 1; if (OF_getprop(node, "#address-cells", &acells, sizeof(acells)) != sizeof(acells)) acells = 3; if (OF_getprop(node, "#size-cells", &scells, sizeof(scells)) != sizeof(scells)) scells = 2; #ifdef ofppc if (modeldata.ranges_offset == 0) scells -= 1; #endif if (type == RANGE_TYPE_ISA) reclen = 6; else reclen = parent_acells + acells + scells; /* * There exist ISA buses with empty ranges properties. This is * known to occur on the Pegasos II machine, and likely others. * According to them, that means that the isa bus is a fake bus, and * the real maps are the PCI maps of the preceding bus. To deal * with this, we will set cur to -1 and return. */ if (type == RANGE_TYPE_ISA && strcmp("isa", tmp) == 0 && len == 0) { *cur = -1; DPRINTF("Found empty range in isa bus\n"); return; } DPRINTF("found a map reclen=%d cur=%d len=%d\n", reclen, *cur, len); switch (type) { case RANGE_TYPE_PCI: case RANGE_TYPE_FIRSTPCI: for (i=0; i < len/(4*reclen); i++) { DPRINTF("FOUND PCI RANGE\n"); regions[*cur].size = map[i*reclen + parent_acells + acells + scells - 1]; /* skip ranges of size==0 */ if (regions[*cur].size == 0) continue; regions[*cur].type = (map[i*reclen] >> 24) & 0x3; regions[*cur].addr = map[i*reclen + parent_acells + acells - 1]; (*cur)++; } break; case RANGE_TYPE_ISA: for (i=0; i < len/(4*reclen); i++) { if (map[i*reclen] == 1) regions[*cur].type = RANGE_IO; else regions[*cur].type = RANGE_MEM; DPRINTF("FOUND ISA RANGE TYPE=%d\n", regions[*cur].type); regions[*cur].size = map[i*reclen + acells + scells]; (*cur)++; } break; case RANGE_TYPE_MACIO: regions[*cur].type = RANGE_MEM; if (len == 8) { regions[*cur].size = map[1]; regions[*cur].addr = map[0]; } else { regions[*cur].size = map[2]; regions[*cur].addr = map[1]; } (*cur)++; break; } DPRINTF("returning with CUR=%d\n", *cur); return; rec: for (node = OF_child(base); node; node = OF_peer(node)) { DPRINTF("RECURSE 1 STEP\n"); find_ranges(node, regions, cur, type); if (*cur == -1) return; } } static int find_lowest_range(rangemap_t *ranges, int nrof, int type) { int i, low = 0; u_int32_t addr = 0xffffffff; for (i=0; i < nrof; i++) { if (ranges[i].type == type && ranges[i].addr != 0 && ranges[i].addr < addr) { low = i; addr = ranges[i].addr; } } if (addr == 0xffffffff) return -1; return low; } /* * Find a region of memory, and create a bus_space_tag for it. * Notes: * For ISA node is ignored. * node is the starting node. if -1, we start at / and map everything. */ int ofwoea_map_space(int rangetype, int iomem, int node, struct powerpc_bus_space *tag, const char *name) { int i, cur, range, nrofholes, error; static int exmap=0; rangemap_t region, holes[32], list[32]; memset(list, 0, sizeof(list)); memset(®ion, 0, sizeof(region)); cur = 0; if (rangetype == RANGE_TYPE_ISA || node == -1) node = OF_finddevice("/"); if (rangetype == RANGE_TYPE_ISA) { u_int32_t size = 0; rangemap_t regions[32]; DPRINTF("LOOKING FOR FIRSTPCI\n"); find_ranges(node, list, &cur, RANGE_TYPE_FIRSTPCI); range = 0; DPRINTF("LOOKING FOR ISA\n"); find_ranges(node, regions, &range, RANGE_TYPE_ISA); if (range == 0 || cur == 0) return -1; /* no isa stuff found */ /* * This may be confusing to some. The ISA ranges property * is supposed to be a set of IO ranges for the ISA bus, but * generally, it's just a set of pci devfunc lists that tell * you to go look at the parent PCI device for the actual * ranges. */ if (range == -1) { /* we found a rangeless isa bus */ if (iomem == RANGE_IO) size = 0x10000; else size = 0x1000000; } DPRINTF("found isa stuff\n"); for (i=0; i < range; i++) if (regions[i].type == iomem) size = regions[i].size; if (iomem == RANGE_IO) { /* the first io range is the one */ for (i=0; i < cur; i++) if (list[i].type == RANGE_IO && size) { DPRINTF("found IO\n"); tag->pbs_offset = list[i].addr; tag->pbs_limit = size; error = bus_space_init(tag, name, ex_storage[exmap], sizeof(ex_storage[exmap])); exmap++; return error; } } else { for (i=0; i < cur; i++) if (list[i].type == RANGE_MEM && list[i].size == size) { DPRINTF("found mem\n"); tag->pbs_offset = list[i].addr; tag->pbs_limit = size; error = bus_space_init(tag, name, ex_storage[exmap], sizeof(ex_storage[exmap])); exmap++; return error; } } return -1; /* NO ISA FOUND */ } find_ranges(node, list, &cur, rangetype); DPRINTF("cur == %d\n", cur); /* now list should contain a list of memory regions */ for (i=0; i < cur; i++) DPRINTF("addr=0x%x size=0x%x type=%d\n", list[i].addr, list[i].size, list[i].type); range = find_lowest_range(list, cur, iomem); i = 0; nrofholes = 0; while (range != -1) { DPRINTF("range==%d\n", range); DPRINTF("i==%d\n", i); if (i == 0) { memcpy(®ion, &list[range], sizeof(rangemap_t)); list[range].addr = 0; i++; range = find_lowest_range(list, cur, iomem); continue; } if (region.addr + region.size < list[range].addr) { /* allocate a hole */ holes[nrofholes].type = iomem; holes[nrofholes].addr = region.size + region.addr; holes[nrofholes].size = list[range].addr - holes[nrofholes].addr - 1; nrofholes++; } region.size = list[range].size + list[range].addr - region.addr; list[range].addr = 0; range = find_lowest_range(list, cur, iomem); } DPRINTF("RANGE iomem=%d FOUND\n", iomem); DPRINTF("addr=0x%x size=0x%x type=%d\n", region.addr, region.size, region.type); DPRINTF("HOLES FOUND\n"); for (i=0; i < nrofholes; i++) DPRINTF("addr=0x%x size=0x%x type=%d\n", holes[i].addr, holes[i].size, holes[i].type); /* AT THIS POINT WE MAP IT */ if ((rangetype == RANGE_TYPE_PCI) || (rangetype == RANGE_TYPE_MACIO)) { if (exmap == EXSTORAGE_MAX) panic("Not enough ex_storage space. " "Increase EXSTORAGE_MAX"); /* XXX doing this in here might be wrong */ if (iomem == 1) { /* we map an IO region */ tag->pbs_offset = region.addr; tag->pbs_base = 0; tag->pbs_limit = region.size; } else { /* ... or a memory region */ tag->pbs_offset = 0; tag->pbs_base = region.addr; tag->pbs_limit = region.size + region.addr; } error = bus_space_init(tag, name, ex_storage[exmap], sizeof(ex_storage[exmap])); exmap++; if (error) panic("ofwoea_bus_space_init: can't init tag %s", name); for (i=0; i < nrofholes; i++) { if (holes[i].type == RANGE_IO) { error = extent_alloc_region(tag->pbs_extent, holes[i].addr - tag->pbs_offset, holes[i].size, EX_NOWAIT); } else { error = extent_alloc_region(tag->pbs_extent, holes[i].addr, holes[i].size, EX_NOWAIT); } if (error) panic("ofwoea_bus_space_init: can't block out" " reserved space 0x%x-0x%x: error=%d", holes[i].addr, holes[i].addr+holes[i].size, error); } return error; } return -1; } void ofwoea_bus_space_init(void) { int error; error = ofwoea_map_space(RANGE_TYPE_ISA, RANGE_IO, -1, &genppc_isa_io_space_tag, "isa-ioport"); if (error > 0) panic("Could not map ISA IO"); error = ofwoea_map_space(RANGE_TYPE_ISA, RANGE_MEM, -1, &genppc_isa_mem_space_tag, "isa-iomem"); if (error > 0) panic("Could not map ISA MEM"); }