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- /*
- * This file is part of the libpayload project.
- *
- * Copyright (C) 2008 Advanced Micro Devices, Inc.
- * Copyright (C) 2009 coresystems GmbH
- *
- * 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.
- * 3. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 "u.h"
- #include "../port/lib.h"
- #include "mem.h"
- #include "dat.h"
- #include "fns.h"
- #include "../port/error.h"
- #include "coreboot.h"
- /*
- * Some of this is x86 specific, and the rest of it is generic. Right now,
- * since we only support x86, we'll avoid trying to make lots of infrastructure
- * we don't need. If in the future, we want to use coreboot on some other
- * architecture, then take out the generic parsing code and move it elsewhere.
- */
- /* === Parsing code === */
- /* This is the generic parsing code. */
- #define I_AM_HERE print("Core 0 is in %s() at %s:%d\n", \
- __FUNCTION__, __FILE__, __LINE__);
- static void cb_parse_memory(void *ptr, struct sysinfo_t *info)
- { print("%s\n", __func__);
- struct cb_memory *mem = ptr;
- int count = MEM_RANGE_COUNT(mem);
- int i;
- if (count > SYSINFO_MAX_MEM_RANGES)
- count = SYSINFO_MAX_MEM_RANGES;
- info->n_memranges = 0;
- for (i = 0; i < count; i++) {
- struct cb_memory_range *range = MEM_RANGE_PTR(mem, i);
- info->memrange[info->n_memranges].base =
- cb_unpack64(range->start);
- info->memrange[info->n_memranges].size =
- cb_unpack64(range->size);
- info->memrange[info->n_memranges].type = range->type;
- info->n_memranges++;
- }
- }
- static void cb_parse_serial(void *ptr, struct sysinfo_t *info)
- { print("%s\n", __func__);
- info->serial = ((struct cb_serial *)ptr);
- }
- static void cb_parse_vboot_handoff(unsigned char *ptr, struct sysinfo_t *info)
- { print("%s\n", __func__);
- struct cb_range *vbho = (struct cb_range *)ptr;
- info->vboot_handoff = (void *)(uintptr_t)vbho->range_start;
- info->vboot_handoff_size = vbho->range_size;
- }
- static void cb_parse_vbnv(unsigned char *ptr, struct sysinfo_t *info)
- { print("%s\n", __func__);
- struct cb_range *vbnv = (struct cb_range *)ptr;
- info->vbnv_start = vbnv->range_start;
- info->vbnv_size = vbnv->range_size;
- }
- static void cb_parse_gpios(unsigned char *ptr, struct sysinfo_t *info)
- { print("%s\n", __func__);
- int i;
- struct cb_gpios *gpios = (struct cb_gpios *)ptr;
- info->num_gpios = (gpios->count < SYSINFO_MAX_GPIOS) ?
- (gpios->count) : SYSINFO_MAX_GPIOS;
- for (i = 0; i < info->num_gpios; i++)
- info->gpios[i] = gpios->gpios[i];
- }
- static void cb_parse_vdat(unsigned char *ptr, struct sysinfo_t *info)
- { print("%s\n", __func__);
- struct cb_range *vdat = (struct cb_range *) ptr;
- info->vdat_addr = KADDR(vdat->range_start);
- info->vdat_size = vdat->range_size;
- }
- static void cb_parse_tstamp(unsigned char *ptr, struct sysinfo_t *info)
- { print("%s\n", __func__);
- struct cb_cbmem_tab *const cbmem = (struct cb_cbmem_tab *)ptr;
- info->tstamp_table = KADDR(cbmem->cbmem_tab);
- }
- static void cb_parse_cbmem_cons(unsigned char *ptr, struct sysinfo_t *info)
- { print("%s\n", __func__);
- struct cb_cbmem_tab *const cbmem = (struct cb_cbmem_tab *)ptr;
- info->cbmem_cons = KADDR(cbmem->cbmem_tab);
- }
- static void cb_parse_mrc_cache(unsigned char *ptr, struct sysinfo_t *info)
- { print("%s\n", __func__);
- struct cb_cbmem_tab *const cbmem = (struct cb_cbmem_tab *)ptr;
- info->mrc_cache = KADDR(cbmem->cbmem_tab);
- }
- static void cb_parse_acpi_gnvs(unsigned char *ptr, struct sysinfo_t *info)
- { print("%s\n", __func__);
- struct cb_cbmem_tab *const cbmem = (struct cb_cbmem_tab *)ptr;
- info->acpi_gnvs = KADDR(cbmem->cbmem_tab);
- }
- static void cb_parse_optiontable(void *ptr, struct sysinfo_t *info)
- { print("%s\n", __func__);
- /* ptr points to a coreboot table entry and is already virtual */
- info->option_table = ptr;
- }
- static void cb_parse_checksum(void *ptr, struct sysinfo_t *info)
- { print("%s\n", __func__);
- struct cb_cmos_checksum *cmos_cksum = ptr;
- info->cmos_range_start = cmos_cksum->range_start;
- info->cmos_range_end = cmos_cksum->range_end;
- info->cmos_checksum_location = cmos_cksum->location;
- }
- static void cb_parse_framebuffer(void *ptr, struct sysinfo_t *info)
- { print("%s\n", __func__);
- /* ptr points to a coreboot table entry and is already virtual */
- info->framebuffer = ptr;
- }
- static void cb_parse_x86_rom_var_mtrr(void *ptr, struct sysinfo_t *info)
- {
- print("%s, ignoring MTRR information.\n", __func__);
- }
- static void cb_parse_string(unsigned char *ptr, char **info)
- { print("%s\n", __func__);
- *info = (char *)((struct cb_string *)ptr)->string;
- }
- int cb_parse_header(void *addr, int len, struct sysinfo_t *info)
- { print("%s\n", __func__);
- struct cb_header *header;
- unsigned char *ptr = addr;
- void *forward;
- int i;
- for (i = 0; i < len; i += 16, ptr += 16) {
- header = (struct cb_header *)ptr;
- if (0)
- print("Check header %p sig %p val %02x %02x %02x %02x\n", header, header->signature,
- header->signature[0],
- header->signature[1],
- header->signature[2],
- header->signature[3]);
- if (!strncmp((char *)header->signature, "LBIO", 4))
- break;
- }
- print("found ? i %d len %d\n", i, len);
- /* We walked the entire space and didn't find anything. */
- if (i >= len)
- return -1;
- I_AM_HERE;
- if (!header->table_bytes)
- return 0;
- I_AM_HERE;
- /* Make sure the checksums match. */
- if (ipchksum((uint8_t *) header, sizeof(*header)) != 0)
- return -1;
- I_AM_HERE;
- if (ipchksum((uint8_t *) (ptr + sizeof(*header)),
- header->table_bytes) != header->table_checksum)
- return -1;
- I_AM_HERE;
- info->header = header;
- /* Now, walk the tables. */
- ptr += header->header_bytes;
- I_AM_HERE;
- for (i = 0; i < header->table_entries; i++) {
- struct cb_record *rec = (struct cb_record *)ptr;
- I_AM_HERE;
- print("rec %p tag %p\n", rec, rec->tag);
- /* We only care about a few tags here (maybe more later). */
- switch (rec->tag) {
- case CB_TAG_FORWARD:
- forward = KADDR((unsigned long)((struct cb_forward *)rec)->forward);
- print("FORWARD: %p %p\n", (unsigned long)((struct cb_forward *)rec)->forward,
- forward);
- return cb_parse_header(forward, len, info);
- continue;
- case CB_TAG_MEMORY:
- cb_parse_memory(ptr, info);
- break;
- case CB_TAG_SERIAL:
- cb_parse_serial(ptr, info);
- break;
- case CB_TAG_VERSION:
- cb_parse_string(ptr, &info->cb_version);
- break;
- case CB_TAG_EXTRA_VERSION:
- cb_parse_string(ptr, &info->extra_version);
- break;
- case CB_TAG_BUILD:
- cb_parse_string(ptr, &info->build);
- break;
- case CB_TAG_COMPILE_TIME:
- cb_parse_string(ptr, &info->compile_time);
- break;
- case CB_TAG_COMPILE_BY:
- cb_parse_string(ptr, &info->compile_by);
- break;
- case CB_TAG_COMPILE_HOST:
- cb_parse_string(ptr, &info->compile_host);
- break;
- case CB_TAG_COMPILE_DOMAIN:
- cb_parse_string(ptr, &info->compile_domain);
- break;
- case CB_TAG_COMPILER:
- cb_parse_string(ptr, &info->compiler);
- break;
- case CB_TAG_LINKER:
- cb_parse_string(ptr, &info->linker);
- break;
- case CB_TAG_ASSEMBLER:
- cb_parse_string(ptr, &info->assembler);
- break;
- case CB_TAG_CMOS_OPTION_TABLE:
- cb_parse_optiontable(ptr, info);
- break;
- case CB_TAG_OPTION_CHECKSUM:
- cb_parse_checksum(ptr, info);
- break;
- // FIXME we should warn on serial if coreboot set up a
- // framebuffer buf the payload does not know about it.
- case CB_TAG_FRAMEBUFFER:
- cb_parse_framebuffer(ptr, info);
- break;
- case CB_TAG_MAINBOARD:
- info->mainboard = (struct cb_mainboard *)ptr;
- case CB_TAG_GPIO:
- cb_parse_gpios(ptr, info);
- break;
- case CB_TAG_VDAT:
- cb_parse_vdat(ptr, info);
- break;
- case CB_TAG_VBNV:
- cb_parse_vbnv(ptr, info);
- break;
- case CB_TAG_VBOOT_HANDOFF:
- cb_parse_vboot_handoff(ptr, info);
- break;
- case CB_TAG_TIMESTAMPS:
- cb_parse_tstamp(ptr, info);
- break;
- case CB_TAG_CBMEM_CONSOLE:
- cb_parse_cbmem_cons(ptr, info);
- break;
- case CB_TAG_MRC_CACHE:
- cb_parse_mrc_cache(ptr, info);
- break;
- case CB_TAG_ACPI_GNVS:
- cb_parse_acpi_gnvs(ptr, info);
- break;
- case CB_TAG_X86_ROM_MTRR:
- cb_parse_x86_rom_var_mtrr(ptr, info);
- break;
- }
- ptr += rec->size;
- }
- return 1;
- }
- enum{
- Qdir,
- Qtable,
- };
- static Dirtab corebootdir[]={
- ".", {Qdir, 0, QTDIR}, 0, DMDIR|0555,
- "table", {Qtable}, 0, 0444,
- };
- static struct sysinfo_t cbinfo;
- static int
- corebootdevgen(Chan *c, char *name, Dirtab *tab, int ntab, int i, Dir *dp)
- {
- int rc;
- rc = devgen(c, name, tab, ntab, i, dp);
- return rc;
- }
- static void
- corebootinit(void)
- {
- get_coreboot_info(&cbinfo);
- }
- static Chan*
- corebootattach(char *spec)
- {
- return devattach('Y', spec);
- }
- static Walkqid*
- corebootwalk(Chan *c, Chan *nc, char **name, int nname)
- {
- Walkqid *wq;
- wq = devwalk(c, nc, name, nname, corebootdir, nelem(corebootdir), devgen);
- /* todo: cover any cases that need locking. There are none yet. */
- return wq;
- }
- static int
- corebootstat(Chan *c, unsigned char *db, int n)
- {
- return devstat(c, db, n, corebootdir, nelem(corebootdir), corebootdevgen);
- }
- static Chan*
- corebootopen(Chan *c, int omode)
- {
- switch((uint32_t)c->qid.path){
- case Qdir:
- if(omode != OREAD)
- error(Eperm);
- break;
- /* default are tables, which are unchanging, and readonly, so no need to lock them.
- * They live in reserved memory.
- */
- default:
- break;
- }
- c->mode = openmode(omode);
- c->flag |= COPEN;
- c->offset = 0;
- return c;
- }
- static void
- corebootcreate(Chan *c, char *j, int i, int u)
- {
- error(Eperm);
- }
- static void
- corebootclose(Chan *c)
- {
- /* anything to do? */
- }
- static int32_t
- corebootread(Chan *c, void *va, int32_t n, int64_t off)
- {
- switch((uint32_t)c->qid.path){
- case Qdir:
- return devdirread(c, va, n, corebootdir, nelem(corebootdir), corebootdevgen);
- case Qtable:
- /* todo: do something */
- break;
- }
- return 0;
- }
- static int32_t
- corebootwrite(Chan *c, void *va, int32_t n, int64_t r)
- {
- switch((uint32_t)c->qid.path){
- case Qdir:
- error(Eisdir);
- break;
- default:
- error(Eperm);
- break;
- }
- error(Egreg);
- return -1;
- }
- Dev corebootdevtab = {
- 'Y',
- "coreboot",
- devreset,
- corebootinit,
- devshutdown,
- corebootattach,
- corebootwalk,
- corebootstat,
- corebootopen,
- corebootcreate,
- corebootclose,
- corebootread,
- devbread,
- corebootwrite,
- devbwrite,
- devremove,
- devwstat,
- };
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