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-rw-r--r--src/lib/cbfs.c118
-rw-r--r--src/lib/cbfs_core.c174
2 files changed, 186 insertions, 106 deletions
diff --git a/src/lib/cbfs.c b/src/lib/cbfs.c
index 7cfa3e2a40..20c9d4957a 100644
--- a/src/lib/cbfs.c
+++ b/src/lib/cbfs.c
@@ -24,85 +24,19 @@
#include <lib.h>
#include <arch/byteorder.h>
+// use CBFS core
+#ifndef __SMM__
+#define CBFS_CORE_WITH_LZMA
+#endif
+#define phys_to_virt(x) (void*)(x)
+#define virt_to_phys(x) (uint32_t)(x)
+#define ERROR(x...) printk(BIOS_ERR, x)
+#define LOG(x...) printk(BIOS_INFO, x)
+// FIXME: romstart/romend are fine on x86, but not on ARM
+#define romstart() 0xffffffff
+#define romend() 0
-static int cbfs_check_magic(struct cbfs_file *file)
-{
- return !strcmp(file->magic, CBFS_FILE_MAGIC) ? 1 : 0;
-}
-
-static struct cbfs_header *cbfs_master_header(void)
-{
- struct cbfs_header *header;
-
- void *ptr = (void *)*((unsigned long *) CBFS_HEADPTR_ADDR);
- printk(BIOS_SPEW, "Check CBFS header at %p\n", ptr);
- header = (struct cbfs_header *) ptr;
-
- printk(BIOS_SPEW, "magic is %08x\n", ntohl(header->magic));
- if (ntohl(header->magic) != CBFS_HEADER_MAGIC) {
- printk(BIOS_ERR, "ERROR: No valid CBFS header found!\n");
- if (header->magic == 0xffffffff) {
- printk(BIOS_ERR, "Maybe the ROM isn't entirely mapped yet?\n"
- "See (and report to) http://www.coreboot.org/Infrastructure_Projects#CBFS\n");
- }
- return NULL;
- }
-
- printk(BIOS_SPEW, "Found CBFS header at %p\n", ptr);
- return header;
-}
-
-struct cbfs_file *cbfs_find(const char *name)
-{
- struct cbfs_header *header = cbfs_master_header();
- unsigned long offset;
-
- if (header == NULL)
- return NULL;
- offset = 0 - ntohl(header->romsize) + ntohl(header->offset);
-
- int align= ntohl(header->align);
-
- while(1) {
- struct cbfs_file *file = (struct cbfs_file *) offset;
- if (!cbfs_check_magic(file)) return NULL;
- printk(BIOS_SPEW, "Check %s\n", CBFS_NAME(file));
- if (!strcmp(CBFS_NAME(file), name))
- return file;
-
- int flen = ntohl(file->len);
- int foffset = ntohl(file->offset);
- printk(BIOS_SPEW, "CBFS: follow chain: %p + %x + %x + align -> ", (void *)offset, foffset, flen);
-
- unsigned long oldoffset = offset;
- offset = ALIGN(offset + foffset + flen, align);
- printk(BIOS_SPEW, "%p\n", (void *)offset);
- if (offset <= oldoffset) return NULL;
-
- if (offset < 0xFFFFFFFF - ntohl(header->romsize))
- return NULL;
- }
-}
-
-void *cbfs_find_file(const char *name, int type)
-{
- struct cbfs_file *file = cbfs_find(name);
-
- if (file == NULL) {
- printk(BIOS_INFO, "CBFS: Could not find file %s\n",
- name);
- return NULL;
- }
-
- if (ntohl(file->type) != type) {
- printk(BIOS_INFO, "CBFS: File %s is of type %x instead of"
- "type %x\n", name, file->type, type);
-
- return NULL;
- }
-
- return (void *) CBFS_SUBHEADER(file);
-}
+#include "cbfs_core.c"
#ifndef __SMM__
static inline int tohex4(unsigned int c)
@@ -118,34 +52,6 @@ static void tohex16(unsigned int val, char* dest)
dest[3]=tohex4(val & 0xf);
}
-/**
- * Decompression wrapper for CBFS
- * @param algo
- * @param src
- * @param dst
- * @param len
- * @return 0 on success, -1 on failure
- */
-static int cbfs_decompress(int algo, void *src, void *dst, int len)
-{
- switch(algo) {
- case CBFS_COMPRESS_NONE:
- memcpy(dst, src, len);
- return 0;
-
- case CBFS_COMPRESS_LZMA:
- if (!ulzma(src, dst)) {
- printk(BIOS_ERR, "CBFS: LZMA decompression failed!\n");
- return -1;
- }
- return 0;
- default:
- printk(BIOS_INFO, "CBFS: Unknown compression type %d\n", algo);
- return -1;
- }
-}
-
-
void *cbfs_load_optionrom(u16 vendor, u16 device, void * dest)
{
char name[17]="pciXXXX,XXXX.rom";
diff --git a/src/lib/cbfs_core.c b/src/lib/cbfs_core.c
new file mode 100644
index 0000000000..52ba58ded7
--- /dev/null
+++ b/src/lib/cbfs_core.c
@@ -0,0 +1,174 @@
+/*
+ * This file is part of the libpayload project.
+ *
+ * Copyright (C) 2011 secunet Security Networks AG
+ *
+ * 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.
+ */
+
+/* The CBFS core requires a couple of #defines or functions to adapt it to the target environment:
+ *
+ * CBFS_CORE_WITH_LZMA (must be #define)
+ * if defined, ulzma() must exist for decompression of data streams
+ *
+ * phys_to_virt(x), virt_to_phys(x)
+ * translate physical addresses to virtual and vice versa
+ * can be idempotent if no mapping is necessary.
+ *
+ * ERROR(x...)
+ * print an error message x (in printf format)
+ *
+ * LOG(x...)
+ * print a debug message x (in printf format)
+ *
+ * romstart()
+ * returns the start address of the ROM image, or 0xffffffff if ROM is
+ * top-aligned. This is a physical address.
+ *
+ * romend()
+ * returns the highest address of the ROM image + 1, for use if
+ * romstart() == 0xffffffff. This is a physical address.
+ */
+
+#include <cbfs_core.h>
+
+
+/* returns pointer to master header or 0xffffffff if not found */
+static struct cbfs_header *get_cbfs_header(void)
+{
+ struct cbfs_header *header;
+
+ /* find header */
+ if (romstart() == 0xffffffff) {
+ header = (struct cbfs_header*)phys_to_virt(*(uint32_t*)phys_to_virt(romend() + CBFS_HEADPTR_ADDR));
+ } else {
+ // FIXME: where's the master header on ARM (our current bottom-aligned platform)?
+ header = NULL;
+ }
+ if (CBFS_HEADER_MAGIC != ntohl(header->magic)) {
+ ERROR("Could not find valid CBFS master header at %p: %x vs %x.\n", header, CBFS_HEADER_MAGIC, ntohl(header->magic));
+ if (header->magic == 0xffffffff) {
+ ERROR("Maybe ROM is not mapped properly?\n");
+ }
+ return (void*)0xffffffff;
+ }
+ return header;
+}
+
+// by must be power-of-two
+#define CBFS_ALIGN(val, by) (typeof(val))((uint32_t)(val + by - 1) & (uint32_t)~(by - 1))
+#define CBFS_ALIGN_UP(val, by) CBFS_ALIGN(val + 1, by)
+
+/* public API starts here*/
+struct cbfs_file *cbfs_find(const char *name)
+{
+ struct cbfs_header *header = get_cbfs_header();
+ if (header == (void*)0xffffffff) return NULL;
+
+ LOG("Searching for %s\n", name);
+
+ void *data, *dataend, *origdata;
+ /* find first entry */
+ if (romstart() == 0xffffffff) {
+ data = (void*)phys_to_virt(romend()) - ntohl(header->romsize) + ntohl(header->offset);
+ dataend = (void*)phys_to_virt(romend());
+ } else {
+ data = (void*)phys_to_virt(romstart()) + ntohl(header->offset);
+ dataend = (void*)phys_to_virt(romstart()) + ntohl(header->romsize);
+ }
+
+ int align = ntohl(header->align);
+
+ origdata = data;
+ while ((data < (dataend - 1)) && (data >= origdata)) {
+ struct cbfs_file *file = data;
+ if (memcmp(CBFS_FILE_MAGIC, file->magic, strlen(CBFS_FILE_MAGIC)) != 0) {
+ // no file header found. corruption?
+ // proceed in aligned steps to resynchronize
+ LOG("No file header found at %p, searching for header\n", data);
+ data = phys_to_virt(CBFS_ALIGN_UP(virt_to_phys(data), align));
+ continue;
+ }
+ LOG("Check %s\n", CBFS_NAME(file));
+ if (strcmp(CBFS_NAME(file), name) == 0) {
+ return file;
+ }
+ void *olddata = data;
+ data = phys_to_virt(CBFS_ALIGN(virt_to_phys(data) + ntohl(file->len) + ntohl(file->offset), align));
+ if (olddata > data) {
+ LOG("Something is wrong here. File chain moved from %p to %p\n", olddata, data);
+ return NULL;
+ }
+ }
+ return NULL;
+}
+
+void *cbfs_get_file(const char *name)
+{
+ struct cbfs_file *file = cbfs_find(name);
+
+ if (file == NULL) {
+ ERROR("Could not find file '%s'.\n", name);
+ return NULL;
+ }
+
+ return (void*)CBFS_SUBHEADER(file);
+}
+
+void *cbfs_find_file(const char *name, int type)
+{
+ struct cbfs_file *file = cbfs_find(name);
+
+ if (file == NULL) {
+ ERROR("Could not find file '%s'.\n", name);
+ return NULL;
+ }
+
+ if (ntohl(file->type) != type) {
+ ERROR("File '%s' is of type %x, but we requested %x.\n", name, ntohl(file->type), type);
+ return NULL;
+ }
+
+ return (void*)CBFS_SUBHEADER(file);
+}
+
+int cbfs_decompress(int algo, void *src, void *dst, int len)
+{
+ switch (algo) {
+ case CBFS_COMPRESS_NONE:
+ memcpy(dst, src, len);
+ return 0;
+#ifdef CBFS_CORE_WITH_LZMA
+ case CBFS_COMPRESS_LZMA:
+ if (ulzma(src, dst) != 0) {
+ return 0;
+ }
+ return -1;
+#endif
+ default:
+ ERROR("tried to decompress %d bytes with algorithm #%x, but that algorithm id is unsupported.\n", len, algo);
+ return -1;
+ }
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-19 21:33:17 +0000