/* * This file is part of the coreboot project. * * Copyright (C) 2008, Jordan Crouse * * 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; version 2 of the License. * * 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., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA */ #include #include #include #include #include #ifndef CONFIG_BIG_ENDIAN #define ntohl(x) ( ((x&0xff)<<24) | ((x&0xff00)<<8) | \ ((x&0xff0000) >> 8) | ((x&0xff000000) >> 24) ) #else #define ntohl(x) (x) #endif int run_address(void *f); int romfs_decompress(int algo, void *src, void *dst, int len) { switch(algo) { case ROMFS_COMPRESS_NONE: memcpy(dst, src, len); return 0; #ifdef CONFIG_COMPRESSION_LZMA case ROMFS_COMPRESS_LZMA: { unsigned long ulzma(unsigned char *src, unsigned char *dst); ulzma(src, dst); } return 0; #endif #ifdef CONFIG_COMPRESSION_NRV2B case ROMFS_COMPRESS_NRV2B: { unsigned long unrv2b(u8 *src, u8 *dst, unsigned long *ilen_p); unsigned long tmp; unrv2b(src, dst, &tmp); } return 0; #endif default: printk_info( "ROMFS: Unknown compression type %d\n", algo); return -1; } } int romfs_check_magic(struct romfs_file *file) { return !strcmp(file->magic, ROMFS_FILE_MAGIC) ? 1 : 0; } struct romfs_header *romfs_master_header(void) { struct romfs_header *header; void *ptr = (void *)*((unsigned long *) ROMFS_HEADPTR_ADDR); printk_debug("Check ROMFS header at %p\n", ptr); header = (struct romfs_header *) ptr; printk_debug("magic is %08x\n", ntohl(header->magic)); if (ntohl(header->magic) != ROMFS_HEADER_MAGIC) { printk_err("NO ROMFS HEADER\n"); return NULL; } printk_debug("Found ROMFS header at %p\n", ptr); return header; } struct romfs_file *romfs_find(const char *name) { struct romfs_header *header = romfs_master_header(); unsigned long offset; if (header == NULL) return NULL; offset = 0 - ntohl(header->romsize) + ntohl(header->offset); while(1) { struct romfs_file *file = (struct romfs_file *) offset; if (romfs_check_magic(file)) printk_info("Check %s\n", ROMFS_NAME(file)); if (romfs_check_magic(file) && !strcmp(ROMFS_NAME(file), name)) return file; offset += ntohl(header->align); if (offset < 0xFFFFFFFF - ntohl(header->romsize)) return NULL; } } struct romfs_stage *romfs_find_file(const char *name, int type) { struct romfs_file *file = romfs_find(name); if (file == NULL) { printk_info( "ROMFS: Could not find file %s\n", name); return NULL; } if (ntohl(file->type) != type) { printk_info( "ROMFS: File %s is of type %x instead of" "type %x\n", name, file->type, type); return NULL; } return (void *) ROMFS_SUBHEADER(file); } void *romfs_load_optionrom(u16 vendor, u16 device, void * dest) { char name[17]; struct romfs_optionrom *orom; u8 *src; sprintf(name,"pci%04x,%04x.rom", vendor, device); orom = (struct romfs_optionrom *) romfs_find_file(name, ROMFS_TYPE_OPTIONROM); if (orom == NULL) return NULL; /* They might have specified a dest address. If so, we can decompress. * If not, there's not much hope of decompressing or relocating the rom. * in the common case, the expansion rom is uncompressed, we * pass 0 in for the dest, and all we have to do is find the rom and * return a pointer to it. */ src = ((unsigned char *) orom) + sizeof(struct romfs_optionrom); if (! dest) return src; if (romfs_decompress(ntohl(orom->compression), src, dest, ntohl(orom->len))) return NULL; return dest; } void * romfs_load_payload(struct lb_memory *lb_mem, const char *name) { int selfboot(struct lb_memory *mem, struct romfs_payload *payload); struct romfs_payload *payload = (struct romfs_payload *) romfs_find_file(name, ROMFS_TYPE_PAYLOAD); struct romfs_payload_segment *segment, *first_segment; if (payload == NULL) return (void *) -1; printk_debug("Got a payload\n"); first_segment = segment = &payload->segments; selfboot(lb_mem, payload); printk_emerg("SELFBOOT RETURNED!\n"); return (void *) -1; } void * romfs_load_stage(const char *name) { struct romfs_stage *stage = (struct romfs_stage *) romfs_find_file(name, ROMFS_TYPE_STAGE); /* this is a mess. There is no ntohll. */ /* for now, assume compatible byte order until we solve this. */ u32 entry; if (stage == NULL) return (void *) -1; printk_info("Stage: load @ %d/%d bytes, enter @ %llx\n", ntohl((u32) stage->load), ntohl(stage->memlen), stage->entry); memset((void *) ntohl((u32) stage->load), 0, ntohl(stage->memlen)); if (romfs_decompress(ntohl(stage->compression), ((unsigned char *) stage) + sizeof(struct romfs_stage), (void *) ntohl((u32) stage->load), ntohl(stage->len))) return (void *) -1; entry = stage->entry; // return (void *) ntohl((u32) stage->entry); return (void *) entry; } void * romfs_get_file(const char *name) { return romfs_find(name); } int romfs_execute_stage(const char *name) { struct romfs_stage *stage = (struct romfs_stage *) romfs_find_file(name, ROMFS_TYPE_STAGE); if (stage == NULL) return 1; if (ntohl(stage->compression) != ROMFS_COMPRESS_NONE) { printk_info( "ROMFS: Unable to run %s: Compressed file" "Not supported for in-place execution\n", name); return 1; } /* FIXME: This isn't right */ printk_info( "ROMFS: run @ %p\n", (void *) ntohl((u32) stage->entry)); return run_address((void *) ntohl((u32) stage->entry)); } /** * * run_address is passed the address of a function taking no parameters and * * jumps to it, returning the result. * * @param f the address to call as a function. * * returns value returned by the function. * */ int run_address(void *f) { int (*v) (void); v = f; return v(); }