/* openfw.c -- Open firmware support funtions. */ /* * GRUB -- GRand Unified Bootloader * Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include #include #include #include #include enum grub_ieee1275_parse_type { GRUB_PARSE_FILENAME, GRUB_PARSE_PARTITION, }; /* Walk children of 'devpath', calling hook for each. */ grub_err_t grub_children_iterate (char *devpath, int (*hook) (struct grub_ieee1275_devalias *alias)) { grub_ieee1275_phandle_t dev; grub_ieee1275_phandle_t child; grub_ieee1275_finddevice (devpath, &dev); if (dev == (grub_ieee1275_phandle_t) -1) return grub_error (GRUB_ERR_UNKNOWN_DEVICE, "Unknown device"); grub_ieee1275_child (dev, &child); if (child == (grub_ieee1275_phandle_t) -1) return grub_error (GRUB_ERR_BAD_DEVICE, "Device has no children"); do { /* XXX: Don't use hardcoded path lengths. */ char childtype[64]; char childpath[64]; char childname[64]; char fullname[64]; struct grub_ieee1275_devalias alias; int actual; grub_ieee1275_get_property (child, "device_type", &childtype, sizeof childtype, &actual); if (actual == -1) continue; grub_ieee1275_package_to_path (child, childpath, sizeof childpath, &actual); if (actual == -1) continue; grub_ieee1275_get_property (child, "name", &childname, sizeof childname, &actual); if (actual == -1) continue; grub_sprintf (fullname, "%s/%s", devpath, childname); alias.type = childtype; alias.path = childpath; alias.name = fullname; hook (&alias); } while (grub_ieee1275_peer (child, &child)); return 0; } /* Iterate through all device aliases. This function can be used to find a device of a specific type. */ grub_err_t grub_devalias_iterate (int (*hook) (struct grub_ieee1275_devalias *alias)) { grub_ieee1275_phandle_t devalias; char aliasname[32]; int actual; struct grub_ieee1275_devalias alias; if (grub_ieee1275_finddevice ("/aliases", &devalias)) return -1; /* XXX: Is this the right way to find the first property? */ aliasname[0] = '\0'; /* XXX: Are the while conditions correct? */ while (grub_ieee1275_next_property (devalias, aliasname, aliasname, &actual) || actual) { grub_ieee1275_phandle_t dev; grub_size_t pathlen; char *devpath; /* XXX: This should be large enough for any possible case. */ char devtype[64]; grub_ieee1275_get_property_length (devalias, aliasname, &pathlen); /* The property `name' is a special case we should skip. */ if (!grub_strcmp (aliasname, "name")) continue; devpath = grub_malloc (pathlen); if (! devpath) return grub_errno; if (grub_ieee1275_get_property (devalias, aliasname, devpath, pathlen, &actual)) { grub_free (devpath); continue; } if (grub_ieee1275_finddevice (devpath, &dev) || dev == (grub_ieee1275_phandle_t) -1) { grub_free (devpath); continue; } if (grub_ieee1275_get_property (dev, "device_type", devtype, sizeof devtype, &actual)) { grub_free (devpath); continue; } alias.name = aliasname; alias.path= devpath; alias.type = devtype; hook (&alias); grub_free (devpath); } return 0; } /* Call the "map" method of /chosen/mmu. */ static int grub_map (grub_addr_t phys, grub_addr_t virt, grub_uint32_t size, grub_uint8_t mode) { struct map_args { struct grub_ieee1275_common_hdr common; char *method; grub_ieee1275_ihandle_t ihandle; grub_uint32_t mode; grub_uint32_t size; grub_uint32_t virt; grub_uint32_t phys; int catch_result; } args; grub_ieee1275_ihandle_t mmu; int len; grub_ieee1275_get_property (grub_ieee1275_chosen, "mmu", &mmu, sizeof mmu, &len); if (len != sizeof mmu) return -1; INIT_IEEE1275_COMMON (&args.common, "call-method", 6, 1); args.method = "map"; args.ihandle = mmu; args.phys = phys; args.virt = virt; args.size = size; args.mode = mode; /* Format is WIMG0PP. */ if (IEEE1275_CALL_ENTRY_FN (&args) == -1) return -1; return args.catch_result; } int grub_claimmap (grub_addr_t addr, grub_size_t size) { if (grub_ieee1275_claim (addr, size, 0, 0)) return -1; if (! grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_REAL_MODE) && grub_map (addr, addr, size, 0x00)) { grub_printf ("map failed: address 0x%x, size 0x%x\n", addr, size); grub_ieee1275_release (addr, size); return -1; } return 0; } /* Get the device arguments of the Open Firmware node name `path'. */ static char * grub_ieee1275_get_devargs (const char *path) { char *colon = grub_strchr (path, ':'); if (! colon) return 0; return grub_strdup (colon + 1); } /* Get the device path of the Open Firmware node name `path'. */ static char * grub_ieee1275_get_devname (const char *path) { char *colon = grub_strchr (path, ':'); char *newpath = 0; int pathlen = grub_strlen (path); auto int match_alias (struct grub_ieee1275_devalias *alias); int match_alias (struct grub_ieee1275_devalias *curalias) { /* briQ firmware can change capitalization in /chosen/bootpath. */ if (! grub_strncasecmp (curalias->path, path, pathlen)) { newpath = grub_strndup (curalias->name, grub_strlen (curalias->name)); return 1; } return 0; } if (colon) pathlen = (int)(colon - path); /* Try to find an alias for this device. */ grub_devalias_iterate (match_alias); if (! newpath) newpath = grub_strdup (path); return newpath; } static char * grub_ieee1275_parse_args (const char *path, enum grub_ieee1275_parse_type ptype) { char type[64]; /* XXX check size. */ char *device = grub_ieee1275_get_devname (path); char *args = grub_ieee1275_get_devargs (path); char *ret = 0; grub_ieee1275_phandle_t dev; if (!args) /* Shouldn't happen. */ return 0; /* We need to know what type of device it is in order to parse the full file path properly. */ if (grub_ieee1275_finddevice (device, &dev)) { grub_error (GRUB_ERR_UNKNOWN_DEVICE, "Device %s not found\n", device); goto fail; } if (grub_ieee1275_get_property (dev, "device_type", &type, sizeof type, 0)) { grub_error (GRUB_ERR_UNKNOWN_DEVICE, "Device %s lacks a device_type property\n", device); goto fail; } if (!grub_strcmp ("block", type)) { /* The syntax of the device arguments is defined in the CHRP and PReP IEEE1275 bindings: "[partition][,[filename]]". */ char *comma = grub_strchr (args, ','); if (ptype == GRUB_PARSE_FILENAME) { if (comma) { char *filepath = comma + 1; ret = grub_malloc (grub_strlen (filepath) + 1); /* Make sure filepath has leading backslash. */ if (filepath[0] != '\\') grub_sprintf (ret, "\\%s", filepath); else grub_strcpy (ret, filepath); } } else if (ptype == GRUB_PARSE_PARTITION) { if (!comma) ret = grub_strdup (args); else ret = grub_strndup (args, (grub_size_t)(comma - args)); } } else { /* XXX Handle net devices by configuring & registering a grub_net_dev here, then return its name? Example path: "net:,,,,,". */ grub_printf ("Unsupported type %s for device %s\n", type, device); } fail: grub_free (device); grub_free (args); return ret; } char * grub_ieee1275_get_filename (const char *path) { return grub_ieee1275_parse_args (path, GRUB_PARSE_FILENAME); } /* Convert a device name from IEEE1275 syntax to GRUB syntax. */ char * grub_ieee1275_encode_devname (const char *path) { char *device = grub_ieee1275_get_devname (path); char *partition = grub_ieee1275_parse_args (path, GRUB_PARSE_PARTITION); char *encoding; if (partition) { unsigned int partno = grub_strtoul (partition, 0, 0); /* GRUB partition numbering is 0-based. */ if (! grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_0_BASED_PARTITIONS)) partno--; /* Assume partno will require less than five bytes to encode. */ encoding = grub_malloc (grub_strlen (device) + 3 + 5); grub_sprintf (encoding, "(%s,%d)", device, partno); } else { encoding = grub_malloc (grub_strlen (device) + 2); grub_sprintf (encoding, "(%s)", device); } grub_free (partition); grub_free (device); return encoding; } void grub_reboot (void) { grub_ieee1275_interpret ("reset-all", 0); } void grub_halt (void) { grub_ieee1275_interpret ("shut-down", 0); }