1 files changed, 234 insertions, 0 deletions
diff --git a/src/lib/romfs.c b/src/lib/romfs.c
new file mode 100644
index 0000000000..87095cfb07
--- /dev/null
+++ b/src/lib/romfs.c
@@ -0,0 +1,234 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2008, Jordan Crouse <jordan@cosmicpenguin.net>
+ *
+ * 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 <types.h>
+#include <string.h>
+#include <console/console.h>
+#include <boot/coreboot_tables.h>
+#include <romfs.h>
+
+#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;
+
+	unsigned long ptr = *((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);
+}
+
+int romfs_load_optionrom(const char *name, u32 dest)
+{
+	struct romfs_optionrom *orom = (struct romfs_optionrom *)
+		romfs_find_file(name, ROMFS_TYPE_OPTIONROM);
+
+	if (orom == NULL)
+		return -1;
+
+	if (romfs_decompress(ntohl(orom->compression),
+			     ((unsigned char *) orom) +
+			     sizeof(struct romfs_optionrom),
+			     (void *) dest,
+			     ntohl(orom->len)))
+		return -1;
+
+	return 0;
+}
+
+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();
+}
+