flashrom

flashrom@flashrom.org

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[PATCH 4/5] Use layout for verify operations too
by Stefan Tauner 25 Dec '11

25 Dec '11

--- this still reads the whole image in... Signed-off-by: Stefan Tauner <stefan.tauner(a)student.tuwien.ac.at> --- flashrom.c | 29 +++++++++++++++++++++-------- 1 files changed, 21 insertions(+), 8 deletions(-) diff --git a/flashrom.c b/flashrom.c index 2eec0d6..57a5565 100644 --- a/flashrom.c +++ b/flashrom.c @@ -1022,16 +1022,29 @@ notfound: int verify_flash(struct flashctx *flash, uint8_t *buf) { - int ret; unsigned int total_size = flash->total_size * 1024; + int ret = 0; + romlayout_t *l; - msg_cinfo("Verifying flash... "); - - ret = verify_range(flash, buf, 0, total_size, NULL); + msg_cinfo("Verifying... "); - if (!ret) - msg_cinfo("VERIFIED. \n"); + l = get_next_included_romentry(0); + /* No included rom entries. Assume complete verify wanted. */ + if (l == NULL) + ret = verify_range(flash, buf, 0, total_size, NULL); + else do { + unsigned int len = l->end - l->start + 1; + msg_gdbg2("Verifying \"%s\" 0x%08x - 0x%08x (%uB)... ", l->name, + l->start, l->end, len); + if(verify_range(flash, buf + l->start, l->start, len, NULL)) { + return 1; + } + msg_gdbg2("done. "); + l = get_next_included_romentry(l->end + 1); + } while (l != NULL); + if (ret == 0) + msg_cinfo("VERIFIED.\n"); return ret; } -- 1.7.1

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[PATCH 3/5] Use layout for read operations too
by Stefan Tauner 25 Dec '11

25 Dec '11

Previously using layout files was useful for write operations only, for reads it was ignored. This patch added layout handling for reads. Based on the "Add -i <image>[:<file>] support" patch this one will output the selected regions to files. If the optional argument is given it is used as a file name, else the image name will be used. --- TODO: man page side note: the execution path of forced reads is wrong or at least worth a look. it does not use doit() but calls read_flash_to_file() directly. Signed-off-by: Stefan Tauner <stefan.tauner(a)student.tuwien.ac.at> --- flash.h | 8 ++++++ flashrom.c | 75 ++++++++++++++++++++++++++++++++++++++++++++++++++++-------- layout.c | 8 ------ 3 files changed, 73 insertions(+), 18 deletions(-) diff --git a/flash.h b/flash.h index 6151e1c..c4d747b 100644 --- a/flash.h +++ b/flash.h @@ -39,6 +39,13 @@ #define TIMEOUT_ERROR -101 typedef unsigned long chipaddr; +typedef struct { + unsigned int start; + unsigned int end; + unsigned int included; + char name[256]; + char file[256]; /* file == "" means not specified. */ +} romlayout_t; int register_shutdown(int (*function) (void *data), void *data); void *programmer_map_flash_region(const char *descr, unsigned long phys_addr, @@ -292,6 +299,7 @@ int print(int type, const char *fmt, ...) __attribute__((format(printf, 2, 3))); int register_include_arg(char *name); int process_include_args(void); int read_romlayout(char *name); +romlayout_t *get_next_included_romentry(unsigned int start); int build_new_image(struct flashctx *flash, int oldcontents_valid, uint8_t *oldcontents, uint8_t *newcontents); /* spi.c */ diff --git a/flashrom.c b/flashrom.c index 708dba0..2eec0d6 100644 --- a/flashrom.c +++ b/flashrom.c @@ -1069,7 +1069,7 @@ int read_buf_from_file(unsigned char *buf, unsigned long size, return 0; } -int write_buf_to_file(unsigned char *buf, unsigned long size, +int write_dump_to_file(unsigned char *buf, unsigned long size, const char *filename) { unsigned long numbytes; @@ -1094,26 +1094,81 @@ int write_buf_to_file(unsigned char *buf, unsigned long size, return 0; } +int write_buf_to_file(unsigned char *buf, unsigned long size, + const char *filename) +{ + romlayout_t *l; + int ret = 0; + + ret = write_dump_to_file(buf, size, filename); + if (ret) + return ret; + + l = get_next_included_romentry(0); + + while (l != NULL) { + const char* name = (l->file[0] == '\0') ? l->name : l->file; + unsigned int len = l->end - l->start + 1; + msg_gdbg2("Writing \"%s\" to \"%s\" 0x%08x - 0x%08x (%uB)... ", + l->name, l->file, l->start, l->end, len); + if(write_dump_to_file(buf + l->start, len, name)) { + msg_gdbg2("failed. "); + return 1; + } + msg_gdbg2("done. "); + l = get_next_included_romentry(l->end + 1); + }; + + return 0; +} + +int read_flash_to_buf(struct flashctx *flash, uint8_t *buf) +{ + romlayout_t *l; + + if (!flash->read) { + msg_cerr("No read function available for this flash chip.\n"); + return 1; + } + + l = get_next_included_romentry(0); + /* No included rom entries. Assume complete readout wanted. */ + if (l == NULL) + return flash->read(flash, buf, 0, flash->total_size * 1024); + + do { + unsigned int len = l->end - l->start + 1; + msg_gdbg2("Reading \"%s\" 0x%08x - 0x%08x (%uB)... ", l->name, + l->start, l->end, len); + if(flash->read(flash, buf + l->start, l->start, len)) { + msg_gdbg2("failed. "); + return 1; + } + msg_gdbg2("done. "); + l = get_next_included_romentry(l->end + 1); + } while (l != NULL); + + return 0; +} + int read_flash_to_file(struct flashctx *flash, const char *filename) { unsigned long size = flash->total_size * 1024; - unsigned char *buf = calloc(size, sizeof(char)); int ret = 0; + uint8_t *buf; msg_cinfo("Reading flash... "); - if (!buf) { + + buf = calloc(size, sizeof(uint8_t)); + if (buf == NULL) { msg_gerr("Memory allocation failed!\n"); - msg_cinfo("FAILED.\n"); - return 1; - } - if (!flash->read) { - msg_cerr("No read function available for this flash chip.\n"); ret = 1; goto out_free; } - if (flash->read(flash, buf, 0, size)) { + + ret = read_flash_to_buf(flash, buf); + if (ret != 0) { msg_cerr("Read operation failed!\n"); - ret = 1; goto out_free; } diff --git a/layout.c b/layout.c index dac9dac..9b10bb3 100644 --- a/layout.c +++ b/layout.c @@ -34,14 +34,6 @@ static int romimages = 0; #define MAX_ROMLAYOUT 32 -typedef struct { - unsigned int start; - unsigned int end; - unsigned int included; - char name[256]; - char file[256]; /* file == "" means not specified. */ -} romlayout_t; - /* include_args lists arguments specified at the command line with -i. They * must be processed at some point so that desired regions are marked as * "included" in the rom_entries list. -- 1.7.1

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[PATCH 2/5] Make read before write configurable (infrastructure part)
by Stefan Tauner 25 Dec '11

25 Dec '11

- Introduce a variable in doit() that allows to influence read-before-write and its consequences. - Rename handle_romentries to build_new_image and a description of its purpose. - Modify build_new_image so that it still works even if the old content is not read before. - Add copy_old_content() to ease the pain for future patches. Signed-off-by: Stefan Tauner <stefan.tauner(a)student.tuwien.ac.at> Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006(a)gmx.net> --- TODO: add UI This is completely wrong. When the user wants to skip most of the chip AND wants to avoid the safety net, it makes no sense at all to read most of the chip in build_new_image. This is needed because the write/skip logic works by comparing the old content with the new content. In the case that old content is already known (because we have read the whole chip before), this is no problem and even nice from a architectural point of view. Allowing to skip the reading breaks the concept though. This patch provides the ugly code that is necessary so that this concept does not explode. It does not fix the concept itself. In the case the user wants to write the whole chip, this provides a real benefit. The smaller the region is that he wants to update, the smaller the benefit becomes. The real solution would be to provide the erase and write logic not just a complete image, from which it can deduce what it can and should skip, but also a layout-like map of what the user wants to be changed (or something similar that allows the following). If the old contents are known, then fine, but if not, read only the parts needed due to erase block overheads and not everything unnecessarily. --- flash.h | 2 +- flashrom.c | 42 ++++++++++++++++++++++-------------------- layout.c | 30 +++++++++++++++++++++++++----- 3 files changed, 48 insertions(+), 26 deletions(-) diff --git a/flash.h b/flash.h index e51b6d4..6151e1c 100644 --- a/flash.h +++ b/flash.h @@ -292,7 +292,7 @@ int print(int type, const char *fmt, ...) __attribute__((format(printf, 2, 3))); int register_include_arg(char *name); int process_include_args(void); int read_romlayout(char *name); -int handle_romentries(struct flashctx *flash, uint8_t *oldcontents, uint8_t *newcontents); +int build_new_image(struct flashctx *flash, int oldcontents_valid, uint8_t *oldcontents, uint8_t *newcontents); /* spi.c */ struct spi_command { diff --git a/flashrom.c b/flashrom.c index f1a6165..708dba0 100644 --- a/flashrom.c +++ b/flashrom.c @@ -1679,6 +1679,7 @@ int doit(struct flashctx *flash, int force, const char *filename, int read_it, uint8_t *newcontents; int ret = 0; unsigned long size = flash->total_size * 1024; + int read_all_first = 1; /* FIXME: Make this configurable. */ if (chip_safety_check(flash, force, read_it, write_it, erase_it, verify_it)) { msg_cerr("Aborting.\n"); @@ -1745,28 +1746,27 @@ int doit(struct flashctx *flash, int force, const char *filename, int read_it, /* Read the whole chip to be able to check whether regions need to be * erased and to give better diagnostics in case write fails. - * The alternative would be to read only the regions which are to be + * The alternative is to read only the regions which are to be * preserved, but in that case we might perform unneeded erase which * takes time as well. */ - msg_cinfo("Reading old flash chip contents... "); - if (flash->read(flash, oldcontents, 0, size)) { - ret = 1; - msg_cinfo("FAILED.\n"); - goto out; + if (read_all_first) { + msg_cinfo("Reading old flash chip contents... "); + if (flash->read(flash, oldcontents, 0, size)) { + ret = 1; + msg_cinfo("FAILED.\n"); + goto out; + } } msg_cinfo("done.\n"); - // This should be moved into each flash part's code to do it - // cleanly. This does the job. - handle_romentries(flash, oldcontents, newcontents); + /* Build a new image from the given layout. */ + build_new_image(flash, read_all_first, oldcontents, newcontents); - // //////////////////////////////////////////////////////////// - - if (write_it) { - if (erase_and_write_flash(flash, oldcontents, newcontents)) { - msg_cerr("Uh oh. Erase/write failed. Checking if " - "anything changed.\n"); + if (write_it && erase_and_write_flash(flash, oldcontents, newcontents)) { + msg_cerr("Uh oh. Erase/write failed."); + if (read_all_first) { + msg_cerr("Checking if anything changed... "); if (!flash->read(flash, newcontents, 0, size)) { if (!memcmp(oldcontents, newcontents, size)) { msg_cinfo("Good. It seems nothing was " @@ -1775,11 +1775,13 @@ int doit(struct flashctx *flash, int force, const char *filename, int read_it, ret = 1; goto out; } - } - emergency_help_message(); - ret = 1; - goto out; - } + } else + msg_cerr("failed.\n"); + } else + msg_cerr("\n"); + emergency_help_message(); + ret = 1; + goto out; } if (verify_it) { diff --git a/layout.c b/layout.c index 4bd1560..dac9dac 100644 --- a/layout.c +++ b/layout.c @@ -338,7 +338,26 @@ static int read_content_from_file(romlayout_t *entry, uint8_t *newcontents) return 0; } -int handle_romentries(struct flashctx *flash, uint8_t *oldcontents, uint8_t *newcontents) +static void copy_old_content(struct flashctx *flash, int oldcontents_valid, uint8_t *oldcontents, uint8_t *newcontents, unsigned int start, unsigned int size) +{ + if (!oldcontents_valid) { + /* oldcontents is a zero-filled buffer. By reading into + * oldcontents, we avoid a rewrite of identical regions even if + * an initial full chip read didn't happen. */ + msg_gdbg2("Read a chunk starting from 0x%06x (len=0x%06x).\n", + start, size); + flash->read(flash, oldcontents + start, start, size); + } + memcpy(newcontents + start, oldcontents + start, size); +} + +/** + * Modify @newcontents so that it contains the data that should be on the chip + * eventually. In the case the user wants to update only parts of it, copy + * the chunks to be preserved from @oldcontents to @newcontents. If @oldcontents + * is not valid, we need to fetch the current data from the chip first. + */ +int build_new_image(struct flashctx *flash, int oldcontents_valid, uint8_t *oldcontents, uint8_t *newcontents) { unsigned int start = 0; romlayout_t *entry; @@ -357,14 +376,15 @@ int handle_romentries(struct flashctx *flash, uint8_t *oldcontents, uint8_t *new entry = get_next_included_romentry(start); /* No more romentries for remaining region? */ if (!entry) { - memcpy(newcontents + start, oldcontents + start, - size - start); + copy_old_content(flash, oldcontents_valid, oldcontents, + newcontents, start, size - start); break; } /* For non-included region, copy from old content. */ if (entry->start > start) - memcpy(newcontents + start, oldcontents + start, - entry->start - start); + copy_old_content(flash, oldcontents_valid, oldcontents, + newcontents, start, + entry->start - start); /* For included region, copy from file if specified. */ if (read_content_from_file(entry, newcontents) != 0) return 1; -- 1.7.1

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[PATCH 1/5] layout: Add -i <image>[:<file>] support
by Stefan Tauner 25 Dec '11

25 Dec '11

Add an optional sub-parameter to the -i parameter to allow building the image to be written from multiple files. This will also allow regions to be read from flash and written to separate image files in a later patch. based on chromiumos' d0ea9ed71e7f86bb8e8db2ca7c32a96de25343d8 Signed-off-by: David Hendricks <dhendrix(a)chromium.org> Signed-off-by: Stefan Tauner <stefan.tauner(a)student.tuwien.ac.at> --- TODO: - man page - handling or at least an explanation of precedence of command line parameters in case of overlapping regions. --- layout.c | 45 ++++++++++++++++++++++++++++++++++++++++++++- 1 files changed, 44 insertions(+), 1 deletions(-) diff --git a/layout.c b/layout.c index 1f7f01a..4bd1560 100644 --- a/layout.c +++ b/layout.c @@ -39,6 +39,7 @@ typedef struct { unsigned int end; unsigned int included; char name[256]; + char file[256]; /* file == "" means not specified. */ } romlayout_t; /* include_args lists arguments specified at the command line with -i. They @@ -183,6 +184,7 @@ int read_romlayout(char *name) rom_entries[romimages].start = strtol(tstr1, (char **)NULL, 16); rom_entries[romimages].end = strtol(tstr2, (char **)NULL, 16); rom_entries[romimages].included = 0; + strcpy(rom_entries[romimages].file, ""); romimages++; } @@ -220,14 +222,24 @@ int register_include_arg(char *name) static int find_romentry(char *name) { int i; + char *file = NULL; if (!romimages) return -1; - msg_gspew("Looking for region \"%s\"... ", name); + /* -i <image>[:<file>] */ + if (strtok(name, ":")) { + file = strtok(NULL, ""); + } + msg_gspew("Looking for region \"%s\" (file=\"%s\")... ", + name, file ? file : "<not specified>"); + for (i = 0; i < romimages; i++) { if (!strcmp(rom_entries[i].name, name)) { rom_entries[i].included = 1; + snprintf(rom_entries[i].file, + sizeof(rom_entries[i].file), + "%s", file ? file : ""); msg_gspew("found.\n"); return i; } @@ -299,6 +311,33 @@ romlayout_t *get_next_included_romentry(unsigned int start) return best_entry; } +/* If a file name is specified for this region, read the file contents and + * overwrite @newcontents in the range specified by @entry. + */ +static int read_content_from_file(romlayout_t *entry, uint8_t *newcontents) +{ + char *file; + FILE *fp; + int len; + + file = entry->file; + len = entry->end - entry->start + 1; + if (file[0] != '\0') { + int numbytes; + if ((fp = fopen(file, "rb")) == NULL) { + perror(file); + return 1; + } + numbytes = fread(newcontents + entry->start, 1, len, fp); + fclose(fp); + if (numbytes != len) { + perror(file); + return 1; + } + } + return 0; +} + int handle_romentries(struct flashctx *flash, uint8_t *oldcontents, uint8_t *newcontents) { unsigned int start = 0; @@ -326,6 +365,10 @@ int handle_romentries(struct flashctx *flash, uint8_t *oldcontents, uint8_t *new if (entry->start > start) memcpy(newcontents + start, oldcontents + start, entry->start - start); + /* For included region, copy from file if specified. */ + if (read_content_from_file(entry, newcontents) != 0) + return 1; + /* Skip to location after current romentry. */ start = entry->end + 1; /* Catch overflow. */ -- 1.7.1

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[PATCH 0/5] layout patches 2.1
by Stefan Tauner 25 Dec '11

25 Dec '11

due to a major mistake the first three patches were merged together before the 2.0 version of this patchset was posted. Stefan Tauner (5): layout: Add -i <image>[:<file>] support Make read before write configurable (infrastructure part) Use layout for read operations too Use layout for verify operations too (not for merge) Fix the "Use layout for verify operations too" patch in a hacky way flash.h | 10 ++++- flashrom.c | 149 ++++++++++++++++++++++++++++++++++++++++++++---------------- layout.c | 81 +++++++++++++++++++++++++++----- 3 files changed, 187 insertions(+), 53 deletions(-)

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[commit] r1482 - trunk
by repository service 25 Dec '11

25 Dec '11

Author: stefanct Date: Sun Dec 25 10:12:16 2011 New Revision: 1482 URL: http://flashrom.org/trac/flashrom/changeset/1482 Log: Add deferred --image processing The general idea and most of the code are based on the following commits in the chromiumos flashrom tree: 8fc0740356ca15d02fb1c65ab43b10844f148c3b bb9049c66ca55e0dc621dd2c70b5d2cb6e5179bf Signed-off-by: Louis Yung-Chieh Lo <yjlou(a)chromium.org> and the main part: d0ea9ed71e7f86bb8e8db2ca7c32a96de25343d8 Signed-off-by: David Hendricks <dhendrix(a)chromium.org> This implementation does not defer the processing until doit(), but after the argument parsing loop only (doit() should not contain argument checks). This allows to specify -i and -l parameters in any order. Signed-off-by: Stefan Tauner <stefan.tauner(a)student.tuwien.ac.at> Acked-by: David Hendricks <dhendrix(a)google.com> Modified: trunk/cli_classic.c trunk/flash.h trunk/layout.c Modified: trunk/cli_classic.c ============================================================================== --- trunk/cli_classic.c Sun Dec 25 10:07:59 2011 (r1481) +++ trunk/cli_classic.c Sun Dec 25 10:12:16 2011 (r1482) @@ -295,14 +295,9 @@ cli_classic_abort_usage(); break; case 'i': - /* FIXME: -l has to be specified before -i. */ tempstr = strdup(optarg); - if (find_romentry(tempstr) < 0) { - fprintf(stderr, "Error: image %s not found in " - "layout file or -i specified before " - "-l\n", tempstr); + if (register_include_arg(tempstr)) cli_classic_abort_usage(); - } break; case 'L': if (++operation_specified > 1) { @@ -395,6 +390,9 @@ cli_classic_abort_usage(); } + if (process_include_args()) + cli_classic_abort_usage(); + /* FIXME: Print the actions flashrom will take. */ if (list_supported) { Modified: trunk/flash.h ============================================================================== --- trunk/flash.h Sun Dec 25 10:07:59 2011 (r1481) +++ trunk/flash.h Sun Dec 25 10:12:16 2011 (r1482) @@ -289,8 +289,9 @@ #define msg_cspew(...) print(MSG_BARF, __VA_ARGS__) /* chip debug barf */ /* layout.c */ +int register_include_arg(char *name); +int process_include_args(void); int read_romlayout(char *name); -int find_romentry(char *name); int handle_romentries(struct flashctx *flash, uint8_t *oldcontents, uint8_t *newcontents); /* spi.c */ Modified: trunk/layout.c ============================================================================== --- trunk/layout.c Sun Dec 25 10:07:59 2011 (r1481) +++ trunk/layout.c Sun Dec 25 10:12:16 2011 (r1482) @@ -41,6 +41,12 @@ char name[256]; } romlayout_t; +/* include_args lists arguments specified at the command line with -i. They + * must be processed at some point so that desired regions are marked as + * "included" in the rom_entries list. + */ +static char *include_args[MAX_ROMLAYOUT]; +static int num_include_args = 0; /* the number of valid entries. */ static romlayout_t rom_entries[MAX_ROMLAYOUT]; #if CONFIG_INTERNAL == 1 /* FIXME: Move the whole block to cbtable.c? */ @@ -156,10 +162,8 @@ if (romimages >= MAX_ROMLAYOUT) { msg_gerr("Maximum number of ROM images (%i) in layout " - "file reached before end of layout file.\n", - MAX_ROMLAYOUT); - msg_gerr("Ignoring the rest of the layout file.\n"); - break; + "file reached.\n", MAX_ROMLAYOUT); + return 1; } if (2 != fscanf(romlayout, "%s %s\n", tempstr, rom_entries[romimages].name)) continue; @@ -194,27 +198,80 @@ } #endif -int find_romentry(char *name) +/* register an include argument (-i) for later processing */ +int register_include_arg(char *name) +{ + if (num_include_args >= MAX_ROMLAYOUT) { + msg_gerr("Too many regions included (%i).\n", num_include_args); + return 1; + } + + if (name == NULL) { + msg_gerr("<NULL> is a bad region name.\n"); + return 1; + } + + include_args[num_include_args] = name; + num_include_args++; + return 0; +} + +/* returns the index of the entry (or a negative value if it is not found) */ +static int find_romentry(char *name) { int i; if (!romimages) return -1; - msg_ginfo("Looking for \"%s\"... ", name); - + msg_gspew("Looking for region \"%s\"... ", name); for (i = 0; i < romimages; i++) { if (!strcmp(rom_entries[i].name, name)) { rom_entries[i].included = 1; - msg_ginfo("found.\n"); + msg_gspew("found.\n"); return i; } } - msg_ginfo("not found.\n"); // Not found. Error. - + msg_gspew("not found.\n"); return -1; } +/* process -i arguments + * returns 0 to indicate success, >0 to indicate failure + */ +int process_include_args(void) +{ + int i; + unsigned int found = 0; + + if (num_include_args == 0) + return 0; + + for (i = 0; i < num_include_args; i++) { + /* User has specified an area, but no layout file is loaded. */ + if (!romimages) { + msg_gerr("Region requested (with -i \"%s\"), " + "but no layout data is available.\n", + include_args[i]); + return 1; + } + + if (find_romentry(include_args[i]) < 0) { + msg_gerr("Invalid region specified: \"%s\"\n", + include_args[i]); + return 1; + } + found++; + } + + msg_ginfo("Using region%s: \"%s\"", num_include_args > 1 ? "s" : "", + include_args[0]); + for (i = 1; i < num_include_args; i++) + msg_ginfo(", \"%s\"", include_args[i]); + msg_ginfo(".\n"); + return 0; +} + romlayout_t *get_next_included_romentry(unsigned int start) { int i; @@ -248,11 +305,12 @@ romlayout_t *entry; unsigned int size = flash->total_size * 1024; - /* If no layout file was specified or the layout file was empty, assume - * that the user wants to flash the complete new image. + /* If no regions were specified for inclusion, assume + * that the user wants to write the complete new image. */ - if (!romimages) + if (num_include_args == 0) return 0; + /* Non-included romentries are ignored. * The union of all included romentries is used from the new image. */ @@ -264,6 +322,7 @@ size - start); break; } + /* For non-included region, copy from old content. */ if (entry->start > start) memcpy(newcontents + start, oldcontents + start, entry->start - start);

1 0

[commit] r1481 - trunk
by repository service 25 Dec '11

25 Dec '11

Author: stefanct Date: Sun Dec 25 10:07:59 2011 New Revision: 1481 URL: http://flashrom.org/trac/flashrom/changeset/1481 Log: layout: change return type and name of find_next_included_romentry - rename from find_next_included_romentry to get_next_included_romentry - return a pointer to a rom_entry instead of just its index. this relieves the (single existing) caller from directly accessing the data structure holding the entries hence improving segregation and readability. Signed-off-by: Stefan Tauner <stefan.tauner(a)student.tuwien.ac.at> Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006(a)gmx.net> Modified: trunk/layout.c Modified: trunk/layout.c ============================================================================== --- trunk/layout.c Sat Dec 24 01:00:32 2011 (r1480) +++ trunk/layout.c Sun Dec 25 10:07:59 2011 (r1481) @@ -215,26 +215,28 @@ return -1; } -int find_next_included_romentry(unsigned int start) +romlayout_t *get_next_included_romentry(unsigned int start) { int i; unsigned int best_start = UINT_MAX; - int best_entry = -1; + romlayout_t *best_entry = NULL; + romlayout_t *cur; /* First come, first serve for overlapping regions. */ for (i = 0; i < romimages; i++) { - if (!rom_entries[i].included) + cur = &rom_entries[i]; + if (!cur->included) continue; /* Already past the current entry? */ - if (start > rom_entries[i].end) + if (start > cur->end) continue; /* Inside the current entry? */ - if (start >= rom_entries[i].start) - return i; + if (start >= cur->start) + return cur; /* Entry begins after start. */ - if (best_start > rom_entries[i].start) { - best_start = rom_entries[i].start; - best_entry = i; + if (best_start > cur->start) { + best_start = cur->start; + best_entry = cur; } } return best_entry; @@ -243,7 +245,7 @@ int handle_romentries(struct flashctx *flash, uint8_t *oldcontents, uint8_t *newcontents) { unsigned int start = 0; - int entry; + romlayout_t *entry; unsigned int size = flash->total_size * 1024; /* If no layout file was specified or the layout file was empty, assume @@ -255,22 +257,21 @@ * The union of all included romentries is used from the new image. */ while (start < size) { - entry = find_next_included_romentry(start); + entry = get_next_included_romentry(start); /* No more romentries for remaining region? */ - if (entry < 0) { + if (!entry) { memcpy(newcontents + start, oldcontents + start, size - start); break; } - if (rom_entries[entry].start > start) + if (entry->start > start) memcpy(newcontents + start, oldcontents + start, - rom_entries[entry].start - start); + entry->start - start); /* Skip to location after current romentry. */ - start = rom_entries[entry].end + 1; + start = entry->end + 1; /* Catch overflow. */ if (!start) break; } - return 0; }

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Re: [flashrom] [PATCH 1/5] layout: change return type and name of find_next_included_romentry
by Carl-Daniel Hailfinger 25 Dec '11

25 Dec '11

Am 24.12.2011 01:35 schrieb Stefan Tauner: > - rename from find_next_included_romentry to get_next_included_romentry > - return a pointer to a rom_entry instead of just its index > > Signed-off-by: Stefan Tauner <stefan.tauner(a)student.tuwien.ac.at> The changelog only describes what you're doing, but not the reason why. If you add a short statement about the reason (readability improvement, whatever) to the changelog, and if you change if (entry == NULL) { to if (!entry) { this is Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006(a)gmx.net> Regards, Carl-Daniel -- http://www.hailfinger.org/

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[PATCH 5/5] (not for merge) Fix the "Use layout for verify operations too" patch in a hacky way
by Stefan Tauner 24 Dec '11

24 Dec '11

if you look at the second half of doit with this patch applied, it is quite clear, that most of it should be guarded by a huge if(write_it) clause. maybe move this into a function? Signed-off-by: Stefan Tauner <stefan.tauner(a)student.tuwien.ac.at> --- flashrom.c | 7 ++++--- 1 files changed, 4 insertions(+), 3 deletions(-) diff --git a/flashrom.c b/flashrom.c index 6aec3f2..95e5c67 100644 --- a/flashrom.c +++ b/flashrom.c @@ -1800,7 +1800,7 @@ int doit(struct flashctx *flash, int force, const char *filename, int read_it, goto out; } - if (write_it || verify_it) { + if (write_it || verify_it) { /* always true: erase and read already goto'ed */ if (read_buf_from_file(newcontents, size, filename)) { ret = 1; goto out; @@ -1818,7 +1818,7 @@ int doit(struct flashctx *flash, int force, const char *filename, int read_it, * preserved, but in that case we might perform unneeded erase which * takes time as well. */ - if (read_all_first) { + if (read_all_first && write_it) { msg_cinfo("Reading old flash chip contents... "); if (flash->read(flash, oldcontents, 0, size)) { ret = 1; @@ -1829,7 +1829,8 @@ int doit(struct flashctx *flash, int force, const char *filename, int read_it, msg_cinfo("done.\n"); /* Build a new image from the given layout. */ - build_new_image(flash, read_all_first, oldcontents, newcontents); + if (write_it) + build_new_image(flash, read_all_first, oldcontents, newcontents); if (write_it && erase_and_write_flash(flash, oldcontents, newcontents)) { msg_cerr("Uh oh. Erase/write failed."); -- 1.7.1

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[PATCH 4/5] Use layout for verify operations too
by Stefan Tauner 24 Dec '11

24 Dec '11

--- this still reads the whole image in... Signed-off-by: Stefan Tauner <stefan.tauner(a)student.tuwien.ac.at> --- flashrom.c | 29 +++++++++++++++++++++-------- 1 files changed, 21 insertions(+), 8 deletions(-) diff --git a/flashrom.c b/flashrom.c index e33152f..6aec3f2 100644 --- a/flashrom.c +++ b/flashrom.c @@ -1022,16 +1022,29 @@ notfound: int verify_flash(struct flashctx *flash, uint8_t *buf) { - int ret; unsigned int total_size = flash->total_size * 1024; + int ret = 0; + romlayout_t *l; - msg_cinfo("Verifying flash... "); - - ret = verify_range(flash, buf, 0, total_size, NULL); + msg_cinfo("Verifying... "); - if (!ret) - msg_cinfo("VERIFIED. \n"); + l = get_next_included_romentry(0); + /* No included rom entries. Assume complete verify wanted. */ + if (l == NULL) + ret = verify_range(flash, buf, 0, total_size, NULL); + else do { + unsigned int len = l->end - l->start + 1; + msg_gdbg2("Verifying \"%s\" 0x%08x - 0x%08x (%uB)... ", l->name, + l->start, l->end, len); + if(verify_range(flash, buf + l->start, l->start, len, NULL)) { + return 1; + } + msg_gdbg2("done. "); + l = get_next_included_romentry(l->end + 1); + } while (l != NULL); + if (ret == 0) + msg_cinfo("VERIFIED.\n"); return ret; } -- 1.7.1

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