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-rw-r--r--util/cbfstool/cbfs.h10
-rw-r--r--util/cbfstool/cbfstool.h2
-rw-r--r--util/cbfstool/fs.c221
-rw-r--r--util/cbfstool/util.c3
4 files changed, 177 insertions, 59 deletions
diff --git a/util/cbfstool/cbfs.h b/util/cbfstool/cbfs.h
index 95159ebaa8..04a12fc24a 100644
--- a/util/cbfstool/cbfs.h
+++ b/util/cbfstool/cbfs.h
@@ -38,6 +38,16 @@
#define CBFS_COMPONENT_PAYLOAD 0x20
#define CBFS_COMPONENT_OPTIONROM 0x30
+/* The deleted type is chosen to be a value
+ * that can be written in a FLASH from all other
+ * values.
+ */
+#define CBFS_COMPONENT_DELETED 0
+
+/* for all known FLASH, this value can be changed
+ * to all other values. This allows NULL files to be
+ * changed without a block erase
+ */
#define CBFS_COMPONENT_NULL 0xFFFFFFFF
/** this is the master cbfs header - it need to be
diff --git a/util/cbfstool/cbfstool.h b/util/cbfstool/cbfstool.h
index 289b4812ab..51abd29b58 100644
--- a/util/cbfstool/cbfstool.h
+++ b/util/cbfstool/cbfstool.h
@@ -71,6 +71,8 @@ struct cbfs_file *rom_find(struct rom *rom, unsigned int offset);
struct cbfs_file *rom_find_first(struct rom *);
struct cbfs_file *rom_find_next(struct rom *, struct cbfs_file *);
int rom_add(struct rom *rom, const char *name, void *, int size, int type);
+int rom_set_header(struct rom *rom, struct cbfs_file *c,
+ const char*name, int size, int type);
int rom_extract(struct rom *rom, const char *name, void **buf, unsigned long *size);
int rom_remove(struct rom *rom, const char *name);
unsigned int rom_used_space(struct rom *rom);
diff --git a/util/cbfstool/fs.c b/util/cbfstool/fs.c
index ff5741e37e..8292163961 100644
--- a/util/cbfstool/fs.c
+++ b/util/cbfstool/fs.c
@@ -18,8 +18,140 @@
*/
#include <string.h>
+#include <stdlib.h>
#include "cbfstool.h"
+int namelen(const char *name)
+{
+ return ALIGN(strlen(name) + 1, 16);
+}
+
+/**
+ * Given a name, return the header size for that name.
+ * @param name The name
+ * @returns The header size given that name
+ */
+int headersize(const char *name)
+{
+ return sizeof(struct cbfs_file) + namelen(name);
+}
+
+/**
+ * Given a name, set it into the header in a standard way
+ * @param file the cbfs file
+ * @param name The name
+ */
+void setname(struct cbfs_file *file, const char *name)
+{
+ memset(CBFS_NAME(file), 0, namelen(name));
+ strcpy((char *)CBFS_NAME(file), name);
+}
+
+/**
+ * Given a name, size, and type, set them into the header in a standard way.
+ * Special case of size of -1: set the size to all of ROM
+ * @param rom The rom
+ * @param c The cbfs file
+ * @param name The name
+ * @param size The size
+ * @param type The type
+ * @returns Always 0 for now
+ */
+int rom_set_header(struct rom *rom, struct cbfs_file *c, const char *name, int size, int type)
+{
+ unsigned int csize;
+ csize = headersize(name);
+
+ strcpy(c->magic, COMPONENT_MAGIC);
+
+ /* special case -- if size is -1, means "as much as you can"
+ * it's usually only used in init.
+ */
+ if (size < 0)
+ size = rom->fssize - csize;
+ c->len = htonl(size);
+ c->offset = htonl(csize);
+ c->type = htonl(type);
+
+ setname(c, name);
+ return 0;
+}
+
+int nextfile(struct rom *rom, struct cbfs_file *c, int offset)
+{
+ return ALIGN(offset + ntohl(c->len),
+ ntohl(rom->header->align));
+}
+
+/**
+ * rom_alloc
+ * Given a rom, walk the headers and find the first header of type
+ * CBFS_COMPONENT_NULL that is >= the desired size.
+ * If the CBFS_COMPONENT_NULL is 'align' bytes > size,
+ * create a new header of CBFS_COMPONENT_NULL following the file.
+ * The 'len' structure member of the desired file is initialized, but
+ * nothing else is.
+ * @param rom The rom
+ * @param size the size of the file needed
+ * @returns pointer to a cbfs_file struct.
+ */
+struct cbfs_file * rom_alloc(struct rom *rom, unsigned long size)
+{
+ /* walk the rom and find an empty file with a base > base, and a large enough size */
+ unsigned int offset = ntohl(rom->header->offset);
+ unsigned int ret = -1;
+ struct cbfs_file *c = NULL;
+ unsigned long nextoffset, truncoffset;
+ struct cbfs_file *newfile = NULL;
+
+ while (offset < rom->fssize) {
+
+ c = (struct cbfs_file *)ROM_PTR(rom, offset);
+
+ if (!strcmp(c->magic, COMPONENT_MAGIC)) {
+ if (c->type != CBFS_COMPONENT_NULL) {
+ offset += ALIGN(ntohl(c->offset) + ntohl(c->len),
+ ntohl(rom->header->align));
+ continue;
+ }
+ /* Is this file big enough for our needs? */
+ if (ntohl(c->len) >= size){
+ ret = offset;
+ break;
+ }
+ offset += ALIGN(ntohl(c->offset) + ntohl(c->len),
+ ntohl(rom->header->align));
+ } else {
+ fprintf(stderr, "Corrupt rom -- found no header at %d\n", offset);
+ exit(1);
+ }
+ }
+
+ if (ret < 0)
+ return NULL;
+
+ /* figure out the real end of this file, and hence the size */
+ /* compute where the next file is */
+ nextoffset = ALIGN(ret + ntohl(c->len) + headersize((char *)CBFS_NAME(c)),
+ ntohl(rom->header->align));
+ /* compute where the end of this new file might be */
+ truncoffset = ALIGN(ret + size + headersize((char *)CBFS_NAME(c)),
+ ntohl(rom->header->align));
+ /* If there is more than align bytes difference, create a new empty file */
+ /* later, we can add code to merge all empty files. */
+ if (nextoffset - truncoffset > ntohl(rom->header->align)) {
+ unsigned int csize;
+ csize = headersize("");
+ newfile = (struct cbfs_file *)ROM_PTR(rom, truncoffset);
+ rom_set_header(rom, newfile, "",
+ nextoffset - truncoffset - csize, CBFS_COMPONENT_NULL);
+ } else truncoffset = nextoffset;
+
+ c->len = htonl(size);
+
+ return ((struct cbfs_file *)ROM_PTR(rom, ret));
+}
+
struct cbfs_file *rom_find(struct rom *rom, unsigned int offset)
{
while (offset < rom->fssize) {
@@ -49,29 +181,6 @@ struct cbfs_file *rom_find_next(struct rom *rom, struct cbfs_file *prev)
ntohl(rom->header->align)));
}
-struct cbfs_file *rom_find_empty(struct rom *rom)
-{
- unsigned int offset = ntohl(rom->header->offset);
- unsigned int ret = ntohl(rom->header->offset);
-
- while (offset < rom->fssize) {
-
- struct cbfs_file *c =
- (struct cbfs_file *)ROM_PTR(rom, offset);
-
- if (!strcmp(c->magic, COMPONENT_MAGIC)) {
- offset += ALIGN(ntohl(c->offset) + ntohl(c->len),
- ntohl(rom->header->align));
-
- ret = offset;
- } else
- offset += ntohl(rom->header->align);
- }
-
- return (ret < rom->fssize) ?
- (struct cbfs_file *)ROM_PTR(rom, ret) : NULL;
-}
-
struct cbfs_file *rom_find_by_name(struct rom *rom, const char *name)
{
struct cbfs_file *c = rom_find_first(rom);
@@ -92,43 +201,36 @@ unsigned int rom_used_space(struct rom *rom)
unsigned int ret = 0;
while (c) {
- ret = ROM_OFFSET(rom, c) + ntohl(c->offset) + ntohl(c->len);
+ int type;
+ type = ntohl(c->type);
+ if ((c->type == CBFS_COMPONENT_DELETED) ||
+ (c->type == CBFS_COMPONENT_NULL))
+ continue;
+ ret += ROM_OFFSET(rom, c) + ntohl(c->offset) + ntohl(c->len);
c = rom_find_next(rom, c);
}
return ret;
}
+/**
+ * delete an item. This is a flash-friendly version -- it just blows the
+ * type to 0. Nothing else is changed.
+ * N.B. We no longer shuffle contents of ROM. That will come later.
+ * @param rom The rom
+ * @param name Name of file to remove.
+ * @return -1 on error, 0 if a file was set to deleted.
+ */
int rom_remove(struct rom *rom, const char *name)
{
struct cbfs_file *c = rom_find_by_name(rom, name);
- struct cbfs_file *n;
- int clear;
if (c == NULL) {
ERROR("Component %s does not exist\n", name);
return -1;
}
- /* Get the next component - and copy it into the current space if it
- * exists. If there is no next component, just delete c. */
-
- n = rom_find_next(rom, c);
-
- if (n != NULL) {
- memcpy(c, n, rom->fssize - ROM_OFFSET(rom, n));
- clear = ROM_OFFSET(rom, n) - ROM_OFFSET(rom, c);
- }
- else { /* No component after this one. */
- unsigned int csize;
- csize = sizeof(struct cbfs_file) + ALIGN(strlen(name) + 1, 16);
- clear = ntohl(c->len) + csize;
- memcpy(c, ((void*)c) + clear,
- rom->fssize - (ROM_OFFSET(rom, c)+clear));
- }
-
- /* Zero the new space, which is always at the end. */
- memset(ROM_PTR(rom, rom->fssize - clear), 0, clear);
+ c->type = CBFS_COMPONENT_DELETED;
return 0;
}
@@ -145,14 +247,24 @@ int rom_extract(struct rom *rom, const char *name, void** buf, unsigned long *si
*size = ntohl(c->len);
- csize = sizeof(struct cbfs_file) + ALIGN(strlen(name) + 1, 16);
+ csize = headersize(name);
*buf = ((unsigned char *)c) + csize;
return 0;
}
+/**
+ * Add a new file named 'name', of type 'type', size 'size'. Initialize that file
+ * with the contents of 'buffer'.
+ * @param rom The rom
+ * @param name file name
+ * @param buffer file data
+ * @param size Amount of data
+ * @param type File type
+ * @returns -1 on failure, 0 on success
+ */
int rom_add(struct rom *rom, const char *name, void *buffer, int size, int type)
{
- struct cbfs_file *c = rom_find_empty(rom);
+ struct cbfs_file *c = rom_alloc(rom, size);
unsigned int offset;
unsigned int csize;
@@ -166,27 +278,18 @@ int rom_add(struct rom *rom, const char *name, void *buffer, int size, int type)
return -1;
}
- csize = sizeof(struct cbfs_file) + ALIGN(strlen(name) + 1, 16);
+ csize = headersize(name);
offset = ROM_OFFSET(rom, c);
- if (offset + csize + size > rom->fssize) {
- ERROR("There is not enough room in this ROM for this\n");
- ERROR("component. I need %d bytes, only have %d bytes avail\n",
- csize + size, rom->fssize - offset);
-
- return -1;
- }
-
strcpy(c->magic, COMPONENT_MAGIC);
- c->len = htonl(size);
c->offset = htonl(csize);
c->type = htonl(type);
- memset(CBFS_NAME(c), 0, ALIGN(strlen(name) + 1, 16));
- strcpy((char *)CBFS_NAME(c), name);
+ setname(c, name);
memcpy(((unsigned char *)c) + csize, buffer, size);
return 0;
}
+
diff --git a/util/cbfstool/util.c b/util/cbfstool/util.c
index 8f2a65bd0c..b36e9187a0 100644
--- a/util/cbfstool/util.c
+++ b/util/cbfstool/util.c
@@ -218,6 +218,9 @@ int create_rom(struct rom *rom, const unsigned char *filename,
ROM_WRITEL(rom, rom->size - 4,
0xFFFFFFF0 - bootblocksize - sizeof(struct cbfs_header));
+
+ /* write the empty header */
+ rom_set_header(rom, (struct cbfs_file *)rom->ptr, "", -1, CBFS_COMPONENT_NULL);
return 0;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-02 21:55:56 +0000