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- /*
- * This file is part of the UCB release of Plan 9. It is subject to the license
- * terms in the LICENSE file found in the top-level directory of this
- * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
- * part of the UCB release of Plan 9, including this file, may be copied,
- * modified, propagated, or distributed except according to the terms contained
- * in the LICENSE file.
- */
- #include "u.h"
- #include "../port/lib.h"
- #include "mem.h"
- #include "dat.h"
- #include "fns.h"
- #include "io.h"
- #include "apic.h"
- #include "acpi.h"
- /* -----------------------------------------------------------------------------
- * Basic ACPI device.
- *
- * The qid.Path will be made unique by incrementing lastpath. lastpath starts
- * at Qroot.
- *
- * Qtbl will return a pointer to the Atable, which includes the signature, OEM
- * data, and so on.
- *
- * Raw, at any level, dumps the raw table at that level, which by the ACPI
- * flattened tree layout will include all descendents.
- *
- * Qpretty, at any level, will print the pretty form for that level and all
- * descendants.
- */
- enum {
- Qroot = 0,
- // The type is the qid.path mod NQtypes.
- Qdir = 0,
- Qpretty,
- Qraw,
- Qtbl,
- NQtypes,
- QIndexShift = 8,
- QIndexMask = (1 << QIndexShift) - 1,
- };
- /* what do we need to round up to? */
- #define ATABLEBUFSZ ROUNDUP(sizeof(Atable), 128)
- static uint64_t lastpath;
- static PSlice emptyslice;
- static Atable **atableindex;
- Dev acpidevtab;
- static char * devname(void)
- {
- return acpidevtab.name;
- }
- static int devdc(void)
- {
- return acpidevtab.dc;
- }
- /*
- * ACPI 4.0 Support.
- * Still WIP.
- *
- * This driver locates tables and parses only a small subset
- * of tables. All other tables are mapped and kept for the user-level
- * interpreter.
- */
- /*
- static Cmdtab ctls[] = {
- {CMregion, "region", 6},
- {CMgpe, "gpe", 3},
- };
- */
- static Facs *facs; /* Firmware ACPI control structure */
- static Fadt *fadt; /* Fixed ACPI description to reach ACPI regs */
- static Atable *root;
- static Xsdt *xsdt; /* XSDT table */
- static Atable *tfirst; /* loaded DSDT/SSDT/... tables */
- //static Atable *tlast; /* pointer to last table */
- Atable *apics; /* APIC info */
- Atable *srat; /* System resource affinity used by physalloc */
- Atable *dmar;
- static Slit *slit; /* Sys locality info table used by scheduler */
- static Atable *mscttbl; /* Maximum system characteristics table */
- //static Reg *reg; /* region used for I/O */
- static Gpe *gpes; /* General purpose events */
- static int ngpes;
- static char *regnames[] = {
- "mem", "io", "pcicfg", "embed",
- "smb", "cmos", "pcibar", "ipmi",
- };
- /*
- * Lists to store RAM that we copy ACPI tables into. When we map a new
- * ACPI list into the kernel, we copy it into a specifically RAM buffer
- * (to make sure it's not coming from e.g. slow device memory). We store
- * pointers to those buffers on these lists.
- */
- struct Acpilist {
- struct Acpilist *next;
- size_t size;
- int8_t raw[];
- };
- typedef struct Acpilist Acpilist;
- static Acpilist *acpilists;
- /*
- * Produces an Atable at some level in the tree. Note that Atables are
- * isomorphic to directories in the file system namespace; this code
- * ensures that invariant.
- */
- Atable *mkatable(Atable *parent,
- int type, char *name, uint8_t *raw,
- size_t rawsize, size_t addsize)
- {
- void *m;
- Atable *t;
- m = mallocz(ATABLEBUFSZ + addsize, 1);
- if (m == nil)
- panic("no memory for more aml tables");
- t = m;
- t->parent = parent;
- t->tbl = nil;
- if (addsize != 0)
- t->tbl = m + ATABLEBUFSZ;
- t->rawsize = rawsize;
- t->raw = raw;
- strlcpy(t->name, name, sizeof(t->name));
- mkqid(&t->qid, (lastpath << QIndexShift) + Qdir, 0, QTDIR);
- mkqid(&t->rqid, (lastpath << QIndexShift) + Qraw, 0, 0);
- mkqid(&t->pqid, (lastpath << QIndexShift) + Qpretty, 0, 0);
- mkqid(&t->tqid, (lastpath << QIndexShift) + Qtbl, 0, 0);
- lastpath++;
- return t;
- }
- Atable *finatable(Atable *t, PSlice *slice)
- {
- size_t n;
- Atable *tail;
- Dirtab *dirs;
- n = pslicelen(slice);
- t->nchildren = n;
- t->children = (Atable **)pslicefinalize(slice);
- dirs = reallocarray(nil, n + NQtypes, sizeof(Dirtab));
- assert(dirs != nil);
- dirs[0] = (Dirtab){ ".", t->qid, 0, 0555 };
- dirs[1] = (Dirtab){ "pretty", t->pqid, 0, 0444 };
- dirs[2] = (Dirtab){ "raw", t->rqid, 0, 0444 };
- dirs[3] = (Dirtab){ "table", t->tqid, 0, 0444 };
- for (size_t i = 0; i < n; i++) {
- strlcpy(dirs[i + NQtypes].name, t->children[i]->name, KNAMELEN);
- dirs[i + NQtypes].qid = t->children[i]->qid;
- dirs[i + NQtypes].length = 0;
- dirs[i + NQtypes].perm = DMDIR | 0555;
- }
- t->cdirs = dirs;
- tail = nil;
- while (n-- > 0) {
- t->children[n]->next = tail;
- tail = t->children[n];
- }
- return t;
- }
- Atable *finatable_nochildren(Atable *t)
- {
- return finatable(t, &emptyslice);
- }
- static char *dumpGas(char *start, char *end, char *prefix, Gas *g);
- static void dumpxsdt(void);
- static char *acpiregstr(int id)
- {
- static char buf[20]; /* BUG */
- if (id >= 0 && id < nelem(regnames))
- return regnames[id];
- seprint(buf, buf + sizeof(buf), "spc:%#x", id);
- return buf;
- }
- static int acpiregid(char *s)
- {
- for (int i = 0; i < nelem(regnames); i++)
- if (strcmp(regnames[i], s) == 0)
- return i;
- return -1;
- }
- /*
- * TODO(rminnich): Fix these if we're ever on a different-endian machine.
- * They are specific to little-endian processors and are not portable.
- */
- static uint8_t mget8(uintptr_t p, void *unused)
- {
- uint8_t *cp = (uint8_t *) p;
- return *cp;
- }
- static void mset8(uintptr_t p, uint8_t v, void *unused)
- {
- uint8_t *cp = (uint8_t *) p;
- *cp = v;
- }
- static uint16_t mget16(uintptr_t p, void *unused)
- {
- uint16_t *cp = (uint16_t *) p;
- return *cp;
- }
- static void mset16(uintptr_t p, uint16_t v, void *unused)
- {
- uint16_t *cp = (uint16_t *) p;
- *cp = v;
- }
- static uint32_t mget32(uintptr_t p, void *unused)
- {
- uint32_t *cp = (uint32_t *) p;
- return *cp;
- }
- static void mset32(uintptr_t p, uint32_t v, void *unused)
- {
- uint32_t *cp = (uint32_t *) p;
- *cp = v;
- }
- static uint64_t mget64(uintptr_t p, void *unused)
- {
- uint64_t *cp = (uint64_t *) p;
- return *cp;
- }
- static void mset64(uintptr_t p, uint64_t v, void *unused)
- {
- uint64_t *cp = (uint64_t *) p;
- *cp = v;
- }
- static uint8_t ioget8(uintptr_t p, void *unused)
- {
- return inb(p);
- }
- static void ioset8(uintptr_t p, uint8_t v, void *unused)
- {
- outb(p, v);
- }
- static uint16_t ioget16(uintptr_t p, void *unused)
- {
- return ins(p);
- }
- static void ioset16(uintptr_t p, uint16_t v, void *unused)
- {
- outs(p, v);
- }
- static uint32_t ioget32(uintptr_t p, void *unused)
- {
- return inl(p);
- }
- static void ioset32(uintptr_t p, uint32_t v, void *unused)
- {
- outl(p, v);
- }
- static uint8_t
- cfgget8(uintptr_t p, void* r)
- {
- Reg *ro = r;
- Pcidev d;
- d.tbdf = ro->tbdf;
- return pcicfgr8(&d, p);
- }
- static void
- cfgset8(uintptr_t p, uint8_t v, void* r)
- {
- Reg *ro = r;
- Pcidev d;
- d.tbdf = ro->tbdf;
- pcicfgw8(&d, p, v);
- }
- static uint16_t
- cfgget16(uintptr_t p, void* r)
- {
- Reg *ro = r;
- Pcidev d;
- d.tbdf = ro->tbdf;
- return pcicfgr16(&d, p);
- }
- static void
- cfgset16(uintptr_t p, uint16_t v, void* r)
- {
- Reg *ro = r;
- Pcidev d;
- d.tbdf = ro->tbdf;
- pcicfgw16(&d, p, v);
- }
- static uint32_t
- cfgget32(uintptr_t p, void* r)
- {
- Reg *ro = r;
- Pcidev d;
- d.tbdf = ro->tbdf;
- return pcicfgr32(&d, p);
- }
- static void
- cfgset32(uintptr_t p, uint32_t v, void* r)
- {
- Reg *ro = r;
- Pcidev d;
- d.tbdf = ro->tbdf;
- pcicfgw32(&d, p, v);
- }
- static struct Regio memio = {
- nil,
- mget8, mset8, mget16, mset16,
- mget32, mset32, mget64, mset64
- };
- static struct Regio ioio = {
- nil,
- ioget8, ioset8, ioget16, ioset16,
- ioget32, ioset32, nil, nil
- };
- static struct Regio cfgio = {
- nil,
- cfgget8, cfgset8, cfgget16, cfgset16,
- cfgget32, cfgset32, nil, nil
- };
- /*
- * Copy memory, 1/2/4/8-bytes at a time, to/from a region.
- */
- static long
- regcpy(Regio *dio, uintptr_t da, Regio *sio,
- uintptr_t sa, long len, int align)
- {
- int n, i;
- print("regcpy %#p %#p %#p %#p\n", da, sa, len, align);
- if ((len % align) != 0)
- print("regcpy: bug: copy not aligned. truncated\n");
- n = len / align;
- for (i = 0; i < n; i++) {
- switch (align) {
- case 1:
- print("cpy8 %#p %#p\n", da, sa);
- dio->set8(da, sio->get8(sa, sio->arg), dio->arg);
- break;
- case 2:
- print("cpy16 %#p %#p\n", da, sa);
- dio->set16(da, sio->get16(sa, sio->arg), dio->arg);
- break;
- case 4:
- print("cpy32 %#p %#p\n", da, sa);
- dio->set32(da, sio->get32(sa, sio->arg), dio->arg);
- break;
- case 8:
- print("cpy64 %#p %#p\n", da, sa);
- print("Not doing set64 for some reason, fix me!");
- // dio->set64(da, sio->get64(sa, sio->arg), dio->arg);
- break;
- default:
- panic("regcpy: align bug");
- }
- da += align;
- sa += align;
- }
- return n * align;
- }
- /*
- * Perform I/O within region in access units of accsz bytes.
- * All units in bytes.
- */
- static long regio(Reg *r, void *p, uint32_t len, uintptr_t off, int iswr)
- {
- Regio rio;
- uintptr_t rp;
- print("reg%s %s %#p %#p %#lx sz=%d\n",
- iswr ? "out" : "in", r->name, p, off, len, r->accsz);
- rp = 0;
- if (off + len > r->len) {
- print("regio: access outside limits");
- len = r->len - off;
- }
- if (len <= 0) {
- print("regio: zero len\n");
- return 0;
- }
- switch (r->spc) {
- case Rsysmem:
- if (r->p == nil)
- r->p = vmap(r->base, len);
- if (r->p == nil)
- error("regio: vmap/KADDR failed");
- rp = (uintptr_t) r->p + off;
- rio = memio;
- break;
- case Rsysio:
- rp = r->base + off;
- rio = ioio;
- break;
- case Rpcicfg:
- rp = r->base + off;
- rio = cfgio;
- rio.arg = r;
- break;
- case Rpcibar:
- case Rembed:
- case Rsmbus:
- case Rcmos:
- case Ripmi:
- case Rfixedhw:
- print("regio: reg %s not supported\n", acpiregstr(r->spc));
- error("region not supported");
- }
- if (iswr)
- regcpy(&rio, rp, &memio, (uintptr_t) p, len, r->accsz);
- else
- regcpy(&memio, (uintptr_t) p, &rio, rp, len, r->accsz);
- return len;
- }
- /*
- * Compute and return SDT checksum: '0' is a correct sum.
- */
- static uint8_t sdtchecksum(void *addr, int len)
- {
- uint8_t *p, sum;
- sum = 0;
- //print("check %p %d\n", addr, len);
- for (p = addr; len-- > 0; p++)
- sum += *p;
- //print("sum is 0x%x\n", sum);
- return sum;
- }
- static void *sdtmap(uintptr_t pa, size_t *n, int cksum)
- {
- Sdthdr *sdt;
- Acpilist *p;
- //print("sdtmap %p\n", (void *)pa);
- if (!pa) {
- print("sdtmap: nil pa\n");
- return nil;
- }
- sdt = vmap(pa, sizeof(Sdthdr));
- if (sdt == nil) {
- print("acpi: vmap: nil\n");
- return nil;
- }
- //print("sdt %p\n", sdt);
- //print("get it\n");
- *n = l32get(sdt->length);
- //print("*n is %d\n", *n);
- if (!*n) {
- print("sdt has zero length: pa = %p, sig = %.4s\n", pa, sdt->sig);
- return nil;
- }
- sdt = vmap(pa, *n);
- if (sdt == nil) {
- print("acpi: vmap: nil\n");
- return nil;
- }
- //print("check it\n");
- if (cksum != 0 && sdtchecksum(sdt, *n) != 0) {
- print("acpi: SDT: bad checksum. pa = %p, len = %lu\n", pa, *n);
- return nil;
- }
- //print("now mallocz\n");
- p = mallocz(sizeof(Acpilist) + *n, 1);
- //print("malloc'ed %p\n", p);
- if (p == nil)
- panic("sdtmap: memory allocation failed for %lu bytes", *n);
- //print("move (%p, %p, %d)\n", p->raw, (void *)sdt, *n);
- memmove(p->raw, (void *)sdt, *n);
- p->size = *n;
- p->next = acpilists;
- acpilists = p;
- //print("sdtmap: size %d\n", *n);
- return p->raw;
- }
- static int loadfacs(uintptr_t pa)
- {
- size_t n;
- facs = sdtmap(pa, &n, 0);
- if (facs == nil)
- return -1;
- if (memcmp(facs->sig, "FACS", 4) != 0) {
- facs = nil;
- return -1;
- }
- /* no unmap */
- if (0) {
- print("acpi: facs: hwsig: %#p\n", facs->hwsig);
- print("acpi: facs: wakingv: %#p\n", facs->wakingv);
- print("acpi: facs: flags: %#p\n", facs->flags);
- print("acpi: facs: glock: %#p\n", facs->glock);
- print("acpi: facs: xwakingv: %#p\n", facs->xwakingv);
- print("acpi: facs: vers: %#p\n", facs->vers);
- print("acpi: facs: ospmflags: %#p\n", facs->ospmflags);
- }
- return 0;
- }
- static void loaddsdt(uintptr_t pa)
- {
- size_t n;
- uint8_t *dsdtp;
- dsdtp = sdtmap(pa, &n, 1);
- //print("Loaded it\n");
- if (dsdtp == nil) {
- print("acpi: Failed to map dsdtp.\n");
- return;
- }
- }
- static void gasget(Gas *gas, uint8_t *p)
- {
- gas->spc = p[0];
- gas->len = p[1];
- gas->off = p[2];
- gas->accsz = p[3];
- gas->addr = l64get(p + 4);
- }
- static char *dumpfadt(char *start, char *end, Fadt *fp)
- {
- if (fp == nil)
- return start;
- start = seprint(start, end, "acpi: FADT@%p\n", fp);
- start = seprint(start, end, "acpi: fadt: facs: $%p\n", fp->facs);
- start = seprint(start, end, "acpi: fadt: dsdt: $%p\n", fp->dsdt);
- start = seprint(start, end, "acpi: fadt: pmprofile: $%p\n", fp->pmprofile);
- start = seprint(start, end, "acpi: fadt: sciint: $%p\n", fp->sciint);
- start = seprint(start, end, "acpi: fadt: smicmd: $%p\n", fp->smicmd);
- start =
- seprint(start, end, "acpi: fadt: acpienable: $%p\n", fp->acpienable);
- start =
- seprint(start, end, "acpi: fadt: acpidisable: $%p\n", fp->acpidisable);
- start = seprint(start, end, "acpi: fadt: s4biosreq: $%p\n", fp->s4biosreq);
- start = seprint(start, end, "acpi: fadt: pstatecnt: $%p\n", fp->pstatecnt);
- start =
- seprint(start, end, "acpi: fadt: pm1aevtblk: $%p\n", fp->pm1aevtblk);
- start =
- seprint(start, end, "acpi: fadt: pm1bevtblk: $%p\n", fp->pm1bevtblk);
- start =
- seprint(start, end, "acpi: fadt: pm1acntblk: $%p\n", fp->pm1acntblk);
- start =
- seprint(start, end, "acpi: fadt: pm1bcntblk: $%p\n", fp->pm1bcntblk);
- start = seprint(start, end, "acpi: fadt: pm2cntblk: $%p\n", fp->pm2cntblk);
- start = seprint(start, end, "acpi: fadt: pmtmrblk: $%p\n", fp->pmtmrblk);
- start = seprint(start, end, "acpi: fadt: gpe0blk: $%p\n", fp->gpe0blk);
- start = seprint(start, end, "acpi: fadt: gpe1blk: $%p\n", fp->gpe1blk);
- start = seprint(start, end, "acpi: fadt: pm1evtlen: $%p\n", fp->pm1evtlen);
- start = seprint(start, end, "acpi: fadt: pm1cntlen: $%p\n", fp->pm1cntlen);
- start = seprint(start, end, "acpi: fadt: pm2cntlen: $%p\n", fp->pm2cntlen);
- start = seprint(start, end, "acpi: fadt: pmtmrlen: $%p\n", fp->pmtmrlen);
- start =
- seprint(start, end, "acpi: fadt: gpe0blklen: $%p\n", fp->gpe0blklen);
- start =
- seprint(start, end, "acpi: fadt: gpe1blklen: $%p\n", fp->gpe1blklen);
- start = seprint(start, end, "acpi: fadt: gp1base: $%p\n", fp->gp1base);
- start = seprint(start, end, "acpi: fadt: cstcnt: $%p\n", fp->cstcnt);
- start = seprint(start, end, "acpi: fadt: plvl2lat: $%p\n", fp->plvl2lat);
- start = seprint(start, end, "acpi: fadt: plvl3lat: $%p\n", fp->plvl3lat);
- start = seprint(start, end, "acpi: fadt: flushsz: $%p\n", fp->flushsz);
- start =
- seprint(start, end, "acpi: fadt: flushstride: $%p\n", fp->flushstride);
- start = seprint(start, end, "acpi: fadt: dutyoff: $%p\n", fp->dutyoff);
- start = seprint(start, end, "acpi: fadt: dutywidth: $%p\n", fp->dutywidth);
- start = seprint(start, end, "acpi: fadt: dayalrm: $%p\n", fp->dayalrm);
- start = seprint(start, end, "acpi: fadt: monalrm: $%p\n", fp->monalrm);
- start = seprint(start, end, "acpi: fadt: century: $%p\n", fp->century);
- start =
- seprint(start, end, "acpi: fadt: iapcbootarch: $%p\n",
- fp->iapcbootarch);
- start = seprint(start, end, "acpi: fadt: flags: $%p\n", fp->flags);
- start = dumpGas(start, end, "acpi: fadt: resetreg: ", &fp->resetreg);
- start = seprint(start, end, "acpi: fadt: resetval: $%p\n", fp->resetval);
- start = seprint(start, end, "acpi: fadt: xfacs: %p\n", fp->xfacs);
- start = seprint(start, end, "acpi: fadt: xdsdt: %p\n", fp->xdsdt);
- start = dumpGas(start, end, "acpi: fadt: xpm1aevtblk:", &fp->xpm1aevtblk);
- start = dumpGas(start, end, "acpi: fadt: xpm1bevtblk:", &fp->xpm1bevtblk);
- start = dumpGas(start, end, "acpi: fadt: xpm1acntblk:", &fp->xpm1acntblk);
- start = dumpGas(start, end, "acpi: fadt: xpm1bcntblk:", &fp->xpm1bcntblk);
- start = dumpGas(start, end, "acpi: fadt: xpm2cntblk:", &fp->xpm2cntblk);
- start = dumpGas(start, end, "acpi: fadt: xpmtmrblk:", &fp->xpmtmrblk);
- start = dumpGas(start, end, "acpi: fadt: xgpe0blk:", &fp->xgpe0blk);
- start = dumpGas(start, end, "acpi: fadt: xgpe1blk:", &fp->xgpe1blk);
- return start;
- }
- static Atable *parsefadt(Atable *parent,
- char *name, uint8_t *p, size_t rawsize)
- {
- Atable *t;
- Fadt *fp;
- t = mkatable(parent, FADT, name, p, rawsize, sizeof(Fadt));
- if (rawsize < 116) {
- print("ACPI: unusually short FADT, aborting!\n");
- return t;
- }
- /* for now, keep the globals. We'll get rid of them later. */
- fp = t->tbl;
- fadt = fp;
- fp->facs = l32get(p + 36);
- fp->dsdt = l32get(p + 40);
- fp->pmprofile = p[45];
- fp->sciint = l16get(p + 46);
- fp->smicmd = l32get(p + 48);
- fp->acpienable = p[52];
- fp->acpidisable = p[53];
- fp->s4biosreq = p[54];
- fp->pstatecnt = p[55];
- fp->pm1aevtblk = l32get(p + 56);
- fp->pm1bevtblk = l32get(p + 60);
- fp->pm1acntblk = l32get(p + 64);
- fp->pm1bcntblk = l32get(p + 68);
- fp->pm2cntblk = l32get(p + 72);
- fp->pmtmrblk = l32get(p + 76);
- fp->gpe0blk = l32get(p + 80);
- fp->gpe1blk = l32get(p + 84);
- fp->pm1evtlen = p[88];
- fp->pm1cntlen = p[89];
- fp->pm2cntlen = p[90];
- fp->pmtmrlen = p[91];
- fp->gpe0blklen = p[92];
- fp->gpe1blklen = p[93];
- fp->gp1base = p[94];
- fp->cstcnt = p[95];
- fp->plvl2lat = l16get(p + 96);
- fp->plvl3lat = l16get(p + 98);
- fp->flushsz = l16get(p + 100);
- fp->flushstride = l16get(p + 102);
- fp->dutyoff = p[104];
- fp->dutywidth = p[105];
- fp->dayalrm = p[106];
- fp->monalrm = p[107];
- fp->century = p[108];
- fp->iapcbootarch = l16get(p + 109);
- fp->flags = l32get(p + 112);
- /*
- * qemu gives us a 116 byte fadt, though i haven't seen any HW do that.
- * The right way to do this is to realloc the table and fake it out.
- */
- if (rawsize < 244)
- return finatable_nochildren(t);
- gasget(&fp->resetreg, p + 116);
- fp->resetval = p[128];
- fp->xfacs = l64get(p + 132);
- fp->xdsdt = l64get(p + 140);
- gasget(&fp->xpm1aevtblk, p + 148);
- gasget(&fp->xpm1bevtblk, p + 160);
- gasget(&fp->xpm1acntblk, p + 172);
- gasget(&fp->xpm1bcntblk, p + 184);
- gasget(&fp->xpm2cntblk, p + 196);
- gasget(&fp->xpmtmrblk, p + 208);
- gasget(&fp->xgpe0blk, p + 220);
- gasget(&fp->xgpe1blk, p + 232);
- if (fp->xfacs != 0)
- loadfacs(fp->xfacs);
- else
- loadfacs(fp->facs);
- //print("x %p %p %p \n", fp, (void *)fp->xdsdt, (void *)(uint64_t)fp->dsdt);
- if (fp->xdsdt == (uint64_t)fp->dsdt) /* acpica */
- loaddsdt(fp->xdsdt);
- else
- loaddsdt(fp->dsdt);
- //print("y\n");
- return finatable_nochildren(t);
- }
- static char *dumpmsct(char *start, char *end, Atable *table)
- {
- Msct *msct;
- if (!table)
- return start;
- msct = table->tbl;
- if (!msct)
- return start;
- start = seprint(start, end, "acpi: msct: %d doms %d clkdoms %#p maxpa\n",
- msct->ndoms, msct->nclkdoms, msct->maxpa);
- for (int i = 0; i < table->nchildren; i++) {
- Atable *domtbl = table->children[i]->tbl;
- Mdom *st = domtbl->tbl;
- start = seprint(start, end, "\t[%d:%d] %d maxproc %#p maxmmem\n",
- st->start, st->end, st->maxproc, st->maxmem);
- }
- start = seprint(start, end, "\n");
- return start;
- }
- /*
- * XXX: should perhaps update our idea of available memory.
- * Else we should remove this code.
- */
- static Atable *parsemsct(Atable *parent,
- char *name, uint8_t *raw, size_t rawsize)
- {
- Atable *t;
- uint8_t *r, *re;
- Msct *msct;
- size_t off, nmdom;
- int i;
- re = raw + rawsize;
- off = l32get(raw + 36);
- nmdom = 0;
- for (r = raw + off, re = raw + rawsize; r < re; r += 22)
- nmdom++;
- t = mkatable(parent, MSCT, name, raw, rawsize,
- sizeof(Msct) + nmdom * sizeof(Mdom));
- msct = t->tbl;
- msct->ndoms = l32get(raw + 40) + 1;
- msct->nclkdoms = l32get(raw + 44) + 1;
- msct->maxpa = l64get(raw + 48);
- msct->ndoms = nmdom;
- msct->dom = nil;
- if (nmdom != 0)
- msct->dom = (void *)msct + sizeof(Msct);
- for (i = 0, r = raw; i < nmdom; i++, r += 22) {
- msct->dom[i].start = l32get(r + 2);
- msct->dom[i].end = l32get(r + 6);
- msct->dom[i].maxproc = l32get(r + 10);
- msct->dom[i].maxmem = l64get(r + 14);
- }
- mscttbl = finatable_nochildren(t);
- return mscttbl;
- }
- /* TODO(rminnich): only handles on IOMMU for now. */
- static char *dumpdmar(char *start, char *end, Atable *dmar)
- {
- Dmar *dt;
- if (dmar == nil)
- return start;
- dt = dmar->tbl;
- start = seprint(start, end, "acpi: DMAR addr %p:\n", dt);
- start = seprint(start, end, "\tdmar: intr_remap %d haw %d\n",
- dt->intr_remap, dt->haw);
- for (int i = 0; i < dmar->nchildren; i++) {
- Atable *at = dmar->children[i];
- Drhd *drhd = at->tbl;
- start = seprint(start, end, "\tDRHD: ");
- start = seprint(start, end, "%s 0x%02x 0x%016x\n",
- drhd->all & 1 ? "INCLUDE_PCI_ALL" : "Scoped",
- drhd->segment, drhd->rba);
- }
- return start;
- }
- static char *dumpsrat(char *start, char *end, Atable *table)
- {
- if (table == nil)
- return seprint(start, end, "NO SRAT\n");
- start = seprint(start, end, "acpi: SRAT@%p:\n", table->tbl);
- for (; table != nil; table = table->next) {
- Srat *st = table->tbl;
- if (st == nil)
- continue;
- switch (st->type) {
- case SRlapic:
- start =
- seprint(start, end,
- "\tlapic: dom %d apic %d sapic %d clk %d\n",
- st->lapic.dom, st->lapic.apic, st->lapic.sapic,
- st->lapic.clkdom);
- break;
- case SRmem:
- start = seprint(start, end, "\tmem: dom %d %#p %#p %c%c\n",
- st->mem.dom, st->mem.addr, st->mem.len,
- st->mem.hplug ? 'h' : '-',
- st->mem.nvram ? 'n' : '-');
- break;
- case SRlx2apic:
- start =
- seprint(start, end, "\tlx2apic: dom %d apic %d clk %d\n",
- st->lx2apic.dom, st->lx2apic.apic,
- st->lx2apic.clkdom);
- break;
- default:
- start = seprint(start, end, "\t<unknown srat entry>\n");
- }
- }
- start = seprint(start, end, "\n");
- return start;
- }
- static Atable *parsesrat(Atable *parent,
- char *name, uint8_t *p, size_t rawsize)
- {
- Atable *t, *tt;
- uint8_t *pe;
- int stlen, flags;
- PSlice slice;
- char buf[16];
- int i;
- Srat *st;
- /* TODO: Parse the second SRAT */
- if (srat != nil) {
- print("Multiple SRATs detected and ignored!");
- return nil;
- }
- t = mkatable(parent, SRAT, name, p, rawsize, 0);
- psliceinit(&slice);
- pe = p + rawsize;
- for (p += 48, i = 0; p < pe; p += stlen, i++) {
- snprint(buf, sizeof(buf), "%d", i);
- stlen = p[1];
- tt = mkatable(t, SRAT, buf, p, stlen, sizeof(Srat));
- st = tt->tbl;
- st->type = p[0];
- switch (st->type) {
- case SRlapic:
- st->lapic.dom = p[2] | p[9] << 24 | p[10] << 16 | p[11] << 8;
- st->lapic.apic = p[3];
- st->lapic.sapic = p[8];
- st->lapic.clkdom = l32get(p + 12);
- if (l32get(p + 4) == 0) {
- free(tt);
- tt = nil;
- }
- break;
- case SRmem:
- st->mem.dom = l32get(p + 2);
- st->mem.addr = l64get(p + 8);
- st->mem.len = l64get(p + 16);
- flags = l32get(p + 28);
- if ((flags & 1) == 0) { /* not enabled */
- free(tt);
- tt = nil;
- } else {
- st->mem.hplug = flags & 2;
- st->mem.nvram = flags & 4;
- }
- break;
- case SRlx2apic:
- st->lx2apic.dom = l32get(p + 4);
- st->lx2apic.apic = l32get(p + 8);
- st->lx2apic.clkdom = l32get(p + 16);
- if (l32get(p + 12) == 0) {
- free(tt);
- tt = nil;
- }
- break;
- default:
- print("unknown SRAT structure\n");
- free(tt);
- tt = nil;
- break;
- }
- if (tt != nil) {
- finatable_nochildren(tt);
- psliceappend(&slice, tt);
- }
- }
- srat = finatable(t, &slice);
- return srat;
- }
- static char *dumpslit(char *start, char *end, Slit *sl)
- {
- int i;
- if (sl == nil)
- return start;
- start = seprint(start, end, "acpi slit:\n");
- for (i = 0; i < sl->rowlen * sl->rowlen; i++) {
- start = seprint(start, end,
- "slit: %x\n",
- sl->e[i / sl->rowlen][i % sl->rowlen].dist);
- }
- start = seprint(start, end, "\n");
- return start;
- }
- static int cmpslitent(void *v1, void *v2)
- {
- SlEntry *se1, *se2;
- se1 = v1;
- se2 = v2;
- return se1->dist - se2->dist;
- }
- static Atable *parseslit(Atable *parent,
- char *name, uint8_t *raw, size_t rawsize)
- {
- Atable *t;
- uint8_t *r, *re;
- int i;
- SlEntry *se;
- size_t addsize, rowlen;
- void *p;
- addsize = sizeof(*slit);
- rowlen = l64get(raw + 36);
- addsize += rowlen * sizeof(SlEntry *);
- addsize += sizeof(SlEntry) * rowlen * rowlen;
- t = mkatable(parent, SLIT, name, raw, rawsize, addsize);
- slit = t->tbl;
- slit->rowlen = rowlen;
- p = (void *)slit + sizeof(*slit);
- slit->e = p;
- p += rowlen * sizeof(SlEntry *);
- for (i = 0; i < rowlen; i++) {
- slit->e[i] = p;
- p += sizeof(SlEntry) * rowlen;
- }
- for (i = 0, r = raw + 44, re = raw + rawsize; r < re; r++, i++) {
- int j = i / rowlen;
- int k = i % rowlen;
- se = &slit->e[j][k];
- se->dom = k;
- se->dist = *r;
- }
- #if 0
- /* TODO: might need to sort this shit */
- for (i = 0; i < slit->rowlen; i++)
- qsort(slit->e[i], slit->rowlen, sizeof(slit->e[0][0]), cmpslitent);
- #endif
- return finatable_nochildren(t);
- }
- /*
- * we use mp->machno (or index in Mach array) as the identifier,
- * but ACPI relies on the apic identifier.
- */
- int
- corecolor(int core)
- {
- /* FIXME */
- return -1;
- #if 0
- Mach *m;
- Srat *sl;
- static int colors[32];
- if(core < 0 || core >= MACHMAX)
- return -1;
- m = sys->machptr[core];
- if(m == nil)
- return -1;
- if(core >= 0 && core < nelem(colors) && colors[core] != 0)
- return colors[core] - 1;
- for(sl = srat; sl != nil; sl = sl->next)
- if(sl->type == SRlapic && sl->lapic.apic == m->apicno){
- if(core >= 0 && core < nelem(colors))
- colors[core] = 1 + sl->lapic.dom;
- return sl->lapic.dom;
- }
- return -1;
- #endif
- }
- int pickcore(int mycolor, int index)
- {
- if (slit == nil)
- return 0;
- return 0;
- #if 0
- int color;
- int ncorepercol;
- ncorepercol = num_cores / slit->rowlen;
- color = slit->e[mycolor][index / ncorepercol].dom;
- return color * ncorepercol + index % ncorepercol;
- #endif
- }
- static char *polarity[4] = {
- "polarity/trigger like in ISA",
- "active high",
- "BOGUS POLARITY",
- "active low"
- };
- static char *trigger[] = {
- "BOGUS TRIGGER",
- "edge",
- "BOGUS TRIGGER",
- "level"
- };
- static char *printiflags(char *start, char *end, int flags)
- {
- return seprint(start, end, "[%s,%s]",
- polarity[flags & AFpmask], trigger[(flags & AFtmask) >> 2]);
- }
- static char *dumpmadt(char *start, char *end, Atable *apics)
- {
- Madt *mt;
- if (apics == nil)
- return start;
- mt = apics->tbl;
- if (mt == nil)
- return seprint(start, end, "acpi: no MADT");
- start = seprint(start, end, "acpi: MADT@%p: lapic paddr %p pcat %d:\n",
- mt, mt->lapicpa, mt->pcat);
- for (int i = 0; i < apics->nchildren; i++) {
- Atable *apic = apics->children[i];
- Apicst *st = apic->tbl;
- switch (st->type) {
- case ASlapic:
- start =
- seprint(start, end, "\tlapic pid %d id %d\n",
- st->lapic.pid, st->lapic.id);
- break;
- case ASioapic:
- case ASiosapic:
- start =
- seprint(start, end,
- "\tioapic id %d addr %p ibase %d\n",
- st->ioapic.id, st->ioapic.addr, st->ioapic.ibase);
- break;
- case ASintovr:
- start =
- seprint(start, end, "\tintovr irq %d intr %d flags $%p",
- st->intovr.irq, st->intovr.intr, st->intovr.flags);
- start = printiflags(start, end, st->intovr.flags);
- start = seprint(start, end, "\n");
- break;
- case ASnmi:
- start = seprint(start, end, "\tnmi intr %d flags $%p\n",
- st->nmi.intr, st->nmi.flags);
- break;
- case ASlnmi:
- start =
- seprint(start, end, "\tlnmi pid %d lint %d flags $%p\n",
- st->lnmi.pid, st->lnmi.lint, st->lnmi.flags);
- break;
- case ASlsapic:
- start =
- seprint(start, end,
- "\tlsapic pid %d id %d eid %d puid %d puids %s\n",
- st->lsapic.pid, st->lsapic.id, st->lsapic.eid,
- st->lsapic.puid, st->lsapic.puids);
- break;
- case ASintsrc:
- start =
- seprint(start, end,
- "\tintr type %d pid %d peid %d iosv %d intr %d %#x\n",
- st->type, st->intsrc.pid, st->intsrc.peid,
- st->intsrc.iosv, st->intsrc.intr,
- st->intsrc.flags);
- start = printiflags(start, end, st->intsrc.flags);
- start = seprint(start, end, "\n");
- break;
- case ASlx2apic:
- start =
- seprint(start, end, "\tlx2apic puid %d id %d\n",
- st->lx2apic.puid, st->lx2apic.id);
- break;
- case ASlx2nmi:
- start =
- seprint(start, end, "\tlx2nmi puid %d intr %d flags $%p\n",
- st->lx2nmi.puid, st->lx2nmi.intr,
- st->lx2nmi.flags);
- break;
- default:
- start = seprint(start, end, "\t<unknown madt entry>\n");
- }
- }
- start = seprint(start, end, "\n");
- return start;
- }
- static Atable *parsemadt(Atable *parent,
- char *name, uint8_t *p, size_t size)
- {
- Atable *t, *tt;
- uint8_t *pe;
- Madt *mt;
- Apicst *st, *l;
- int id;
- size_t stlen;
- char buf[16];
- int i;
- PSlice slice;
- psliceinit(&slice);
- t = mkatable(parent, MADT, name, p, size, sizeof(Madt));
- mt = t->tbl;
- mt->lapicpa = l32get(p + 36);
- mt->pcat = l32get(p + 40);
- pe = p + size;
- for (p += 44, i = 0; p < pe; p += stlen, i++) {
- snprint(buf, sizeof(buf), "%d", i);
- stlen = p[1];
- tt = mkatable(t, APIC, buf, p, stlen, sizeof(Apicst));
- st = tt->tbl;
- st->type = p[0];
- switch (st->type) {
- case ASlapic:
- st->lapic.pid = p[2];
- st->lapic.id = p[3];
- if (l32get(p + 4) == 0) {
- free(tt);
- tt = nil;
- }
- break;
- case ASioapic:
- st->ioapic.id = id = p[2];
- st->ioapic.addr = l32get(p + 4);
- st->ioapic.ibase = l32get(p + 8);
- /* ioapic overrides any ioapic entry for the same id */
- for (int i = 0; i < pslicelen(&slice); i++) {
- l = ((Atable *)psliceget(&slice, i))->tbl;
- if (l->type == ASiosapic && l->iosapic.id == id) {
- st->ioapic = l->iosapic;
- /* we leave it linked; could be removed */
- break;
- }
- }
- break;
- case ASintovr:
- st->intovr.irq = p[3];
- st->intovr.intr = l32get(p + 4);
- st->intovr.flags = l16get(p + 8);
- break;
- case ASnmi:
- st->nmi.flags = l16get(p + 2);
- st->nmi.intr = l32get(p + 4);
- break;
- case ASlnmi:
- st->lnmi.pid = p[2];
- st->lnmi.flags = l16get(p + 3);
- st->lnmi.lint = p[5];
- break;
- case ASladdr:
- /* This is for 64 bits, perhaps we should not
- * honor it on 32 bits.
- */
- mt->lapicpa = l64get(p + 8);
- break;
- case ASiosapic:
- id = st->iosapic.id = p[2];
- st->iosapic.ibase = l32get(p + 4);
- st->iosapic.addr = l64get(p + 8);
- /* iosapic overrides any ioapic entry for the same id */
- for (int i = 0; i < pslicelen(&slice); i++) {
- l = ((Atable*)psliceget(&slice, i))->tbl;
- if (l->type == ASioapic && l->ioapic.id == id) {
- l->ioapic = st->iosapic;
- free(tt);
- tt = nil;
- break;
- }
- }
- break;
- case ASlsapic:
- st->lsapic.pid = p[2];
- st->lsapic.id = p[3];
- st->lsapic.eid = p[4];
- st->lsapic.puid = l32get(p + 12);
- if (l32get(p + 8) == 0) {
- free(tt);
- tt = nil;
- } else
- kstrdup(&st->lsapic.puids, (char *)p + 16);
- break;
- case ASintsrc:
- st->intsrc.flags = l16get(p + 2);
- st->type = p[4];
- st->intsrc.pid = p[5];
- st->intsrc.peid = p[6];
- st->intsrc.iosv = p[7];
- st->intsrc.intr = l32get(p + 8);
- st->intsrc.any = l32get(p + 12);
- break;
- case ASlx2apic:
- st->lx2apic.id = l32get(p + 4);
- st->lx2apic.puid = l32get(p + 12);
- if (l32get(p + 8) == 0) {
- free(tt);
- tt = nil;
- }
- break;
- case ASlx2nmi:
- st->lx2nmi.flags = l16get(p + 2);
- st->lx2nmi.puid = l32get(p + 4);
- st->lx2nmi.intr = p[8];
- break;
- default:
- print("unknown APIC structure\n");
- free(tt);
- tt = nil;
- }
- if (tt != nil) {
- finatable_nochildren(tt);
- psliceappend(&slice, tt);
- }
- }
- apics = finatable(t, &slice);
- return apics;
- }
- static Atable *parsedmar(Atable *parent,
- char *name, uint8_t *raw, size_t rawsize)
- {
- Atable *t, *tt;
- int i;
- int baselen = MIN(rawsize, 38);
- int nentry, nscope, npath, off, dslen, dhlen, type, flags;
- void *pathp;
- char buf[16];
- PSlice drhds;
- Drhd *drhd;
- Dmar *dt;
- /* count the entries */
- for (nentry = 0, off = 48; off < rawsize; nentry++) {
- dslen = l16get(raw + off + 2);
- print("acpi DMAR: entry %d is addr %p (0x%x/0x%x)\n",
- nentry, raw + off, l16get(raw + off), dslen);
- off = off + dslen;
- }
- print("DMAR: %d entries\n", nentry);
- t = mkatable(parent, DMAR, name, raw, rawsize, sizeof(*dmar));
- dt = t->tbl;
- /* The table can be only partly filled. */
- if (baselen >= 38 && raw[37] & 1)
- dt->intr_remap = 1;
- if (baselen >= 37)
- dt->haw = raw[36] + 1;
- /* Now we walk all the DMAR entries. */
- psliceinit(&drhds);
- for (off = 48, i = 0; i < nentry; i++, off += dslen) {
- snprint(buf, sizeof(buf), "%d", i);
- dslen = l16get(raw + off + 2);
- type = l16get(raw + off);
- // TODO(dcross): Introduce sensible symbolic constants
- // for DMAR entry types. For right now, type 0 => DRHD.
- // We skip everything else.
- if (type != 0)
- continue;
- npath = 0;
- nscope = 0;
- for (int o = off + 16; o < (off + dslen); o += dhlen) {
- nscope++;
- dhlen = *(raw + o + 1); // Single byte length.
- npath += ((dhlen - 6) / 2);
- }
- tt = mkatable(t, DRHD, buf, raw + off, dslen,
- sizeof(Drhd) + 2 * npath +
- nscope * sizeof(DevScope));
- flags = *(raw + off + 4);
- drhd = tt->tbl;
- drhd->all = flags & 1;
- drhd->segment = l16get(raw + off + 6);
- drhd->rba = l64get(raw + off + 8);
- drhd->nscope = nscope;
- drhd->scopes = (void *)drhd + sizeof(Drhd);
- pathp = (void *)drhd +
- sizeof(Drhd) + nscope * sizeof(DevScope);
- for (int i = 0, o = off + 16; i < nscope; i++) {
- DevScope *ds = &drhd->scopes[i];
- dhlen = *(raw + o + 1);
- ds->enumeration_id = *(raw + o + 4);
- ds->start_bus_number = *(raw + o + 5);
- ds->npath = (dhlen - 6) / 2;
- ds->paths = pathp;
- for (int j = 0; j < ds->npath; j++)
- ds->paths[j] = l16get(raw + o + 6 + 2*j);
- pathp += 2*ds->npath;
- o += dhlen;
- }
- /*
- * NOTE: if all is set, there should be no scopes of type
- * This being ACPI, where vendors randomly copy tables
- * from one system to another, and creating breakage,
- * anything is possible. But we'll warn them.
- */
- finatable_nochildren(tt);
- psliceappend(&drhds, tt);
- }
- dmar = finatable(t, &drhds);
- return dmar;
- }
- /*
- * Map the table and keep it there.
- */
- static Atable *parsessdt(Atable *parent,
- char *name, uint8_t *raw, size_t size)
- {
- Atable *t;
- Sdthdr *h;
- /*
- * We found it and it is too small.
- * Simply return with no side effect.
- */
- if (size < Sdthdrsz)
- return nil;
- t = mkatable(parent, SSDT, name, raw, size, 0);
- h = (Sdthdr *)raw;
- memmove(t->name, h->sig, sizeof(h->sig));
- t->name[sizeof(h->sig)] = '\0';
- return finatable_nochildren(t);
- }
- static char *dumptable(char *start, char *end, char *sig, uint8_t *p, int l)
- {
- int n, i;
- if (2 > 1) {
- start = seprint(start, end, "%s @ %#p\n", sig, p);
- if (2 > 2)
- n = l;
- else
- n = 256;
- for (i = 0; i < n; i++) {
- if ((i % 16) == 0)
- start = seprint(start, end, "%x: ", i);
- start = seprint(start, end, " %2.2x", p[i]);
- if ((i % 16) == 15)
- start = seprint(start, end, "\n");
- }
- start = seprint(start, end, "\n");
- start = seprint(start, end, "\n");
- }
- return start;
- }
- static char *seprinttable(char *s, char *e, Atable *t)
- {
- uint8_t *p;
- int i, n;
- p = (uint8_t *)t->tbl; /* include header */
- n = t->rawsize;
- s = seprint(s, e, "%s @ %#p\n", t->name, p);
- for (i = 0; i < n; i++) {
- if ((i % 16) == 0)
- s = seprint(s, e, "%x: ", i);
- s = seprint(s, e, " %2.2x", p[i]);
- if ((i % 16) == 15)
- s = seprint(s, e, "\n");
- }
- return seprint(s, e, "\n\n");
- }
- static void *rsdsearch(char *signature)
- {
- // uintptr_t p;
- // uint8_t *bda;
- // void *rsd;
- /*
- * Search for the data structure signature:
- * 1) in the BIOS ROM between 0xE0000 and 0xFFFFF.
- */
- return sigscan(KADDR(0xE0000), 0x20000, signature);
- }
- /*
- * Note: some of this comment is from the unfinished user interpreter.
- *
- * The DSDT is always given to the user interpreter.
- * Tables listed here are also loaded from the XSDT:
- * MSCT, MADT, and FADT are processed by us, because they are
- * required to do early initialization before we have user processes.
- * Other tables are given to the user level interpreter for
- * execution.
- *
- * These historically returned a value to tell acpi whether or not it was okay
- * to unmap the table. (return 0 means there was no table, meaning it was okay
- * to unmap). We just use the kernbase mapping, so it's irrelevant.
- *
- * N.B. The intel source code defines the constants for ACPI in a
- * non-endian-independent manner. Rather than bring in the huge wad o' code
- * that represents, we just the names.
- */
- typedef struct Parser {
- char *sig;
- Atable *(*parse)(Atable *parent,
- char *name, uint8_t *raw, size_t rawsize);
- } Parser;
- static Parser ptable[] = {
- {"FACP", parsefadt},
- {"APIC", parsemadt},
- {"DMAR", parsedmar},
- {"SRAT", parsesrat},
- {"SLIT", parseslit},
- {"MSCT", parsemsct},
- {"SSDT", parsessdt},
- // {"HPET", parsehpet},
- };
- /*
- * process xsdt table and load tables with sig, or all if nil.
- * (XXX: should be able to search for sig, oemid, oemtblid)
- */
- static void parsexsdt(Atable *root)
- {
- Sdthdr *sdt;
- Atable *table;
- PSlice slice;
- size_t l, end;
- uintptr_t dhpa;
- //Atable *n;
- uint8_t *tbl;
- //print("1\n");
- psliceinit(&slice);
- //print("2\n");
- //print("xsdt %p\n", xsdt);
- tbl = xsdt->p + sizeof(Sdthdr);
- end = xsdt->len - sizeof(Sdthdr);
- print("%s: tbl %p, end %d\n", __func__, tbl, end);
- for (int i = 0; i < end; i += xsdt->asize) {
- dhpa = (xsdt->asize == 8) ? l64get(tbl + i) : l32get(tbl + i);
- sdt = sdtmap(dhpa, &l, 1);
- kmprint("sdt for map of %p, %d, 1 is %p\n", (void *)dhpa, l, sdt);
- if (sdt == nil)
- continue;
- kmprint("acpi: %s: addr %#p\n", __func__, sdt);
- for (int j = 0; j < nelem(ptable); j++) {
- kmprint("tb sig %s\n", ptable[j].sig);
- if (memcmp(sdt->sig, ptable[j].sig, sizeof(sdt->sig)) == 0) {
- table = ptable[j].parse(root, ptable[j].sig, (void *)sdt, l);
- if (table != nil)
- psliceappend(&slice, table);
- break;
- }
- }
- }
- kmprint("FINATABLE\n\n\n\n"); delay(1000);
- finatable(root, &slice);
- }
- void makeindex(Atable *root)
- {
- uint64_t index;
- if (root == nil)
- return;
- index = root->qid.path >> QIndexShift;
- atableindex[index] = root;
- for (int k = 0; k < root->nchildren; k++)
- makeindex(root->children[k]);
- }
- static void parsersdptr(void)
- {
- Rsdp *rsd;
- int asize, cksum;
- uintptr_t sdtpa;
- // static_assert(sizeof(Sdthdr) == 36);
- /* Find the root pointer. */
- rsd = rsdsearch("RSD PTR ");
- if (rsd == nil) {
- print("NO RSDP\n");
- return;
- }
- /*
- * Initialize the root of ACPI parse tree.
- */
- lastpath = Qroot;
- root = mkatable(nil, XSDT, devname(), nil, 0, sizeof(Xsdt));
- root->parent = root;
- kmprint("/* RSDP */ Rsdp = {%08c, %x, %06c, %x, %p, %d, %p, %x}\n",
- rsd->signature, rsd->rchecksum, rsd->oemid, rsd->revision,
- *(uint32_t *)rsd->raddr, *(uint32_t *)rsd->length,
- *(uint32_t *)rsd->xaddr, rsd->xchecksum);
- kmprint("acpi: RSD PTR@ %#p, physaddr $%p length %ud %#llx rev %d\n",
- rsd, l32get(rsd->raddr), l32get(rsd->length),
- l64get(rsd->xaddr), rsd->revision);
- if (rsd->revision >= 2) {
- cksum = sdtchecksum(rsd, 36);
- if (cksum != 0) {
- print("acpi: bad RSD checksum %d, 64 bit parser aborted\n", cksum);
- return;
- }
- sdtpa = l64get(rsd->xaddr);
- asize = 8;
- } else {
- cksum = sdtchecksum(rsd, 20);
- if (cksum != 0) {
- print("acpi: bad RSD checksum %d, 32 bit parser aborted\n", cksum);
- return;
- }
- sdtpa = l32get(rsd->raddr);
- asize = 4;
- }
- /*
- * process the RSDT or XSDT table.
- */
- xsdt = root->tbl;
- xsdt->p = sdtmap(sdtpa, &xsdt->len, 1);
- if (xsdt->p == nil) {
- print("acpi: sdtmap failed\n");
- return;
- }
- if ((xsdt->p[0] != 'R' && xsdt->p[0] != 'X')
- || memcmp(xsdt->p + 1, "SDT", 3) != 0) {
- kmprint("acpi: xsdt sig: %c%c%c%c\n",
- xsdt->p[0], xsdt->p[1], xsdt->p[2], xsdt->p[3]);
- xsdt = nil;
- return;
- }
- xsdt->asize = asize;
- kmprint("acpi: XSDT %#p\n", xsdt);
- parsexsdt(root);
- kmprint("parsexdt done: lastpath %d\n", lastpath);
- atableindex = reallocarray(nil, lastpath, sizeof(Atable *));
- assert(atableindex != nil);
- makeindex(root);
- }
- /*
- * The invariant that each level in the tree has an associated
- * Atable implies that each chan can be mapped to an Atable.
- * The assertions here enforce that invariant.
- */
- static Atable *genatable(Chan *c)
- {
- Atable *a;
- uint64_t ai;
- ai = c->qid.path >> QIndexShift;
- assert(ai < lastpath);
- a = atableindex[ai];
- assert(a != nil);
- return a;
- }
- static int acpigen(Chan *c, char *name, Dirtab *tab, int ntab,
- int i, Dir *dp)
- {
- Atable *a = genatable(c);
- if (i == DEVDOTDOT) {
- assert((c->qid.path & QIndexMask) == Qdir);
- devdir(c, a->parent->qid, a->parent->name, 0, eve, DMDIR|0555, dp);
- return 1;
- }
- return devgen(c, name, a->cdirs, a->nchildren + NQtypes, i, dp);
- }
- /*
- * Print the contents of the XSDT.
- */
- static void dumpxsdt(void)
- {
- kmprint("xsdt: len = %lu, asize = %lu, p = %p\n",
- xsdt->len, xsdt->asize, xsdt->p);
- }
- static char *dumpGas(char *start, char *end, char *prefix, Gas *g)
- {
- start = seprint(start, end, "%s", prefix);
- switch (g->spc) {
- case Rsysmem:
- case Rsysio:
- case Rembed:
- case Rsmbus:
- case Rcmos:
- case Rpcibar:
- case Ripmi:
- start = seprint(start, end, "[%s ", regnames[g->spc]);
- break;
- case Rpcicfg:
- start = seprint(start, end, "[pci ");
- start =
- seprint(start, end, "dev %#p ",
- (uint32_t)(g->addr >> 32) & 0xFFFF);
- start =
- seprint(start, end, "fn %#p ",
- (uint32_t)(g->addr & 0xFFFF0000) >> 16);
- start =
- seprint(start, end, "adr %#p ", (uint32_t)(g->addr & 0xFFFF));
- break;
- case Rfixedhw:
- start = seprint(start, end, "[hw ");
- break;
- default:
- start = seprint(start, end, "[spc=%#p ", g->spc);
- }
- start = seprint(start, end, "off %d len %d addr %#p sz%d]",
- g->off, g->len, g->addr, g->accsz);
- start = seprint(start, end, "\n");
- return start;
- }
- static unsigned int getbanked(uintptr_t ra, uintptr_t rb, int sz)
- {
- unsigned int r;
- r = 0;
- switch (sz) {
- case 1:
- if (ra != 0)
- r |= inb(ra);
- if (rb != 0)
- r |= inb(rb);
- break;
- case 2:
- if (ra != 0)
- r |= ins(ra);
- if (rb != 0)
- r |= ins(rb);
- break;
- case 4:
- if (ra != 0)
- r |= inl(ra);
- if (rb != 0)
- r |= inl(rb);
- break;
- default:
- print("getbanked: wrong size\n");
- }
- return r;
- }
- static unsigned int setbanked(uintptr_t ra, uintptr_t rb, int sz, int v)
- {
- unsigned int r;
- r = -1;
- switch (sz) {
- case 1:
- if (ra != 0)
- outb(ra, v);
- if (rb != 0)
- outb(rb, v);
- break;
- case 2:
- if (ra != 0)
- outs(ra, v);
- if (rb != 0)
- outs(rb, v);
- break;
- case 4:
- if (ra != 0)
- outl(ra, v);
- if (rb != 0)
- outl(rb, v);
- break;
- default:
- print("setbanked: wrong size\n");
- }
- return r;
- }
- static unsigned int getpm1ctl(void)
- {
- assert(fadt != nil);
- return getbanked(fadt->pm1acntblk, fadt->pm1bcntblk, fadt->pm1cntlen);
- }
- static void setpm1sts(unsigned int v)
- {
- assert(fadt != nil);
- setbanked(fadt->pm1aevtblk, fadt->pm1bevtblk, fadt->pm1evtlen / 2, v);
- }
- static unsigned int getpm1sts(void)
- {
- assert(fadt != nil);
- return getbanked(fadt->pm1aevtblk, fadt->pm1bevtblk, fadt->pm1evtlen / 2);
- }
- static unsigned int getpm1en(void)
- {
- int sz;
- assert(fadt != nil);
- sz = fadt->pm1evtlen / 2;
- return getbanked(fadt->pm1aevtblk + sz, fadt->pm1bevtblk + sz, sz);
- }
- static int getgpeen(int n)
- {
- return inb(gpes[n].enio) & 1 << gpes[n].enbit;
- }
- static void setgpeen(int n, unsigned int v)
- {
- int old;
- old = inb(gpes[n].enio);
- if (v)
- outb(gpes[n].enio, old | 1 << gpes[n].enbit);
- else
- outb(gpes[n].enio, old & ~(1 << gpes[n].enbit));
- }
- static void clrgpests(int n)
- {
- outb(gpes[n].stsio, 1 << gpes[n].stsbit);
- }
- static unsigned int getgpests(int n)
- {
- return inb(gpes[n].stsio) & 1 << gpes[n].stsbit;
- }
- #if 0
- static void acpiintr(Ureg *, void *)
- {
- int i;
- unsigned int sts, en;
- print("acpi: intr\n");
- for (i = 0; i < ngpes; i++)
- if (getgpests(i)) {
- print("gpe %d on\n", i);
- en = getgpeen(i);
- setgpeen(i, 0);
- clrgpests(i);
- if (en != 0)
- print("acpiitr: calling gpe %d\n", i);
- // queue gpe for calling gpe->ho in the
- // aml process.
- // enable it again when it returns.
- }
- sts = getpm1sts();
- en = getpm1en();
- print("acpiitr: pm1sts %#p pm1en %#p\n", sts, en);
- if (sts & en)
- print("have enabled events\n");
- if (sts & 1)
- print("power button\n");
- // XXX serve other interrupts here.
- setpm1sts(sts);
- }
- #endif
- static void initgpes(void)
- {
- int i, n0, n1;
- assert(fadt != nil);
- n0 = fadt->gpe0blklen / 2;
- n1 = fadt->gpe1blklen / 2;
- ngpes = n0 + n1;
- gpes = mallocz(sizeof(Gpe) * ngpes, 1);
- for (i = 0; i < n0; i++) {
- gpes[i].nb = i;
- gpes[i].stsbit = i & 7;
- gpes[i].stsio = fadt->gpe0blk + (i >> 3);
- gpes[i].enbit = (n0 + i) & 7;
- gpes[i].enio = fadt->gpe0blk + ((n0 + i) >> 3);
- }
- for (i = 0; i + n0 < ngpes; i++) {
- gpes[i + n0].nb = fadt->gp1base + i;
- gpes[i + n0].stsbit = i & 7;
- gpes[i + n0].stsio = fadt->gpe1blk + (i >> 3);
- gpes[i + n0].enbit = (n1 + i) & 7;
- gpes[i + n0].enio = fadt->gpe1blk + ((n1 + i) >> 3);
- }
- for (i = 0; i < ngpes; i++) {
- setgpeen(i, 0);
- clrgpests(i);
- }
- }
- static void acpiioalloc(unsigned int addr, int len)
- {
- if (addr != 0)
- print("Just TAKING port %016lx to %016lx\n", addr, addr + len);
- }
- static void acpiinitonce(void)
- {
- parsersdptr();
- if (root != nil)
- print("ACPI initialized\n");
- }
- int acpiinit(void)
- {
- static int once = 0;
- //die("acpiinit");
- if (! once)
- acpiinitonce();
- once++;
- return (root == nil) ? -1 : 0;
- }
- static Chan *acpiattach(char *spec)
- {
- Chan *c;
- /*
- * This was written for the stock kernel.
- * This code must use 64 registers to be acpi ready in nix.
- */
- if (acpiinit() < 0)
- error("no acpi");
- /*
- * should use fadt->xpm* and fadt->xgpe* registers for 64 bits.
- * We are not ready in this kernel for that.
- */
- assert(fadt != nil);
- acpiioalloc(fadt->smicmd, 1);
- acpiioalloc(fadt->pm1aevtblk, fadt->pm1evtlen);
- acpiioalloc(fadt->pm1bevtblk, fadt->pm1evtlen);
- acpiioalloc(fadt->pm1acntblk, fadt->pm1cntlen);
- acpiioalloc(fadt->pm1bcntblk, fadt->pm1cntlen);
- acpiioalloc(fadt->pm2cntblk, fadt->pm2cntlen);
- acpiioalloc(fadt->pmtmrblk, fadt->pmtmrlen);
- acpiioalloc(fadt->gpe0blk, fadt->gpe0blklen);
- acpiioalloc(fadt->gpe1blk, fadt->gpe1blklen);
- initgpes();
- #ifdef RON_SAYS_CONFIG_WE_ARE_NOT_WORTHY
- /* this is frightening. SMI: just say no. Although we will almost
- * certainly find that we have no choice.
- *
- * This starts ACPI, which may require we handle
- * power mgmt events ourselves. Use with care.
- */
- outb(fadt->smicmd, fadt->acpienable);
- for (i = 0; i < 10; i++)
- if (getpm1ctl() & Pm1SciEn)
- break;
- if (i == 10)
- error("acpi: failed to enable\n");
- if (fadt->sciint != 0)
- intrenable(fadt->sciint, acpiintr, 0, BUSUNKNOWN, "acpi");
- #endif
- c = devattach(devdc(), spec);
- return c;
- }
- static Walkqid*acpiwalk(Chan *c, Chan *nc, char **name,
- int nname)
- {
- /*
- * Note that devwalk hard-codes a test against the location of 'devgen',
- * so we pretty much have to not pass it here.
- */
- return devwalk(c, nc, name, nname, nil, 0, acpigen);
- }
- static int acpistat(Chan *c, uint8_t *dp, int n)
- {
- Atable *a = genatable(c);
- if (c->qid.type == QTDIR)
- a = a->parent;
- assert(a != nil);
- /* TODO(dcross): make acpigen work here. */
- return devstat(c, dp, n, a->cdirs, a->nchildren + NQtypes, devgen);
- }
- static Chan *acpiopen(Chan *c, int omode)
- {
- return devopen(c, omode, nil, 0, acpigen);
- }
- static void acpiclose(Chan *unused)
- {
- }
- static char *ttext;
- static int tlen;
- // Get the table from the qid.
- // Read that one table using the pointers.
- static int32_t acpiread(Chan *c, void *a, int32_t n, int64_t off)
- {
- long q;
- Atable *t;
- char *ns, *s, *e, *ntext;
- if (ttext == nil) {
- tlen = 32768;
- ttext = mallocz(tlen, 1);
- }
- if (ttext == nil)
- error("acpiread: no memory");
- q = c->qid.path & QIndexMask;
- switch (q) {
- case Qdir:
- return devdirread(c, a, n, nil, 0, acpigen);
- case Qraw:
- return readmem(off, a, n, ttext, tlen);
- case Qtbl:
- s = ttext;
- e = ttext + tlen;
- strlcpy(s, "no tables\n", tlen);
- for (t = tfirst; t != nil; t = t->next) {
- ns = seprinttable(s, e, t);
- while (ns == e - 1) {
- ntext = realloc(ttext, tlen * 2);
- if (ntext == nil)
- panic("acpi: no memory\n");
- s = ntext + (ttext - s);
- ttext = ntext;
- tlen *= 2;
- e = ttext + tlen;
- ns = seprinttable(s, e, t);
- }
- s = ns;
- }
- return readstr(off, a, n, ttext);
- case Qpretty:
- s = ttext;
- e = ttext + tlen;
- s = dumpfadt(s, e, fadt);
- s = dumpmadt(s, e, apics);
- s = dumpslit(s, e, slit);
- s = dumpsrat(s, e, srat);
- s = dumpdmar(s, e, dmar);
- dumpmsct(s, e, mscttbl);
- return readstr(off, a, n, ttext);
- default:
- error("acpiread: bad path");
- }
- error("Permission denied");
- return -1;
- }
- static int32_t acpiwrite(Chan *c, void *a, int32_t n, int64_t off)
- {
- error("acpiwrite: not until we can figure out what it's for");
- return -1;
- #if 0
- ERRSTACK(2);
- cmdtab *ct;
- cmdbuf *cb;
- Reg *r;
- unsigned int rno, fun, dev, bus, i;
- if (c->qid.path == Qio) {
- if (reg == nil)
- error("region not configured");
- return regio(reg, a, n, off, 1);
- }
- if (c->qid.path != Qctl)
- error(EPERM, ERROR_FIXME);
- cb = parsecmd(a, n);
- if (waserror()) {
- free(cb);
- nexterror();
- }
- ct = lookupcmd(cb, ctls, nelem(ctls));
- switch (ct->index) {
- case CMregion:
- /* TODO: this block is racy on reg (global) */
- r = reg;
- if (r == nil) {
- r = mallocz(sizeof(Reg), 1);
- r->name = nil;
- }
- kstrdup(&r->name, cb->f[1]);
- r->spc = acpiregid(cb->f[2]);
- if (r->spc < 0) {
- free(r);
- reg = nil;
- error("bad region type");
- }
- if (r->spc == Rpcicfg || r->spc == Rpcibar) {
- rno = r->base >> Rpciregshift & Rpciregmask;
- fun = r->base >> Rpcifunshift & Rpcifunmask;
- dev = r->base >> Rpcidevshift & Rpcidevmask;
- bus = r->base >> Rpcibusshift & Rpcibusmask;
- r->tbdf = MKBUS(BusPCI, bus, dev, fun);
- r->base = rno; /* register ~ our base addr */
- }
- r->base = strtoul(cb->f[3], nil, 0);
- r->len = strtoul(cb->f[4], nil, 0);
- r->accsz = strtoul(cb->f[5], nil, 0);
- if (r->accsz < 1 || r->accsz > 4) {
- free(r);
- reg = nil;
- error("bad region access size");
- }
- reg = r;
- print("region %s %s %p %p sz%d",
- r->name, acpiregstr(r->spc), r->base, r->len, r->accsz);
- break;
- case CMgpe:
- i = strtoul(cb->f[1], nil, 0);
- if (i >= ngpes)
- error(ERANGE, "gpe out of range");
- kstrdup(&gpes[i].obj, cb->f[2]);
- setgpeen(i, 1);
- break;
- default:
- panic("acpi: unknown ctl");
- }
- poperror();
- free(cb);
- return n;
- #endif
- }
- struct {
- char *(*pretty)(Atable *atbl, char *start, char *end, void *arg);
- } acpisw[NACPITBLS] = {
- };
- static char *pretty(Atable *atbl, char *start, char *end, void *arg)
- {
- int type;
- type = atbl->type;
- if (type < 0 || NACPITBLS < type)
- return start;
- if (acpisw[type].pretty == nil)
- return seprint(start, end, "\"\"\n");
- return acpisw[type].pretty(atbl, start, end, arg);
- }
- static char *raw(Atable *atbl, char *start, char *end, void *unused_arg)
- {
- size_t len = MIN(end - start, atbl->rawsize);
- memmove(start, atbl->raw, len);
- return start + len;
- }
- Dev acpidevtab = {
- .dc = L'α',
- .name = "acpi",
- .reset = devreset,
- .init = devinit,
- .shutdown = devshutdown,
- .attach = acpiattach,
- .walk = acpiwalk,
- .stat = acpistat,
- .open = acpiopen,
- .create = devcreate,
- .close = acpiclose,
- .read = acpiread,
- .bread = devbread,
- .write = acpiwrite,
- .bwrite = devbwrite,
- .remove = devremove,
- .wstat = devwstat,
- };
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