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-rw-r--r--tools/env/README43
-rw-r--r--tools/env/fw_env.c338
-rw-r--r--tools/env/fw_env.config7
-rw-r--r--tools/env/fw_env.h10
4 files changed, 268 insertions, 130 deletions
diff --git a/tools/env/README b/tools/env/README
index 2b54adf76bd..d8386f7f2d6 100644
--- a/tools/env/README
+++ b/tools/env/README
@@ -2,28 +2,43 @@
This is a demo implementation of a Linux command line tool to access
the U-Boot's environment variables.
-Configuration is done via #defines in the fw_env.h file. The
+For the run-time utiltity configuration uncomment the line
+#define CONFIG_FILE "/etc/fw_env.config"
+in fw_env.h.
+
+See comments in the fw_env.config file for definitions for the
+particular board.
+
+Configuration can also be done via #defines in the fw_env.h file. The
following lines are relevant:
#define HAVE_REDUND /* For systems with 2 env sectors */
#define DEVICE1_NAME "/dev/mtd1"
#define DEVICE2_NAME "/dev/mtd2"
-#define ENV1_SIZE 0x4000
-#define DEVICE1_ESIZE 0x4000
-#define ENV2_SIZE 0x4000
-#define DEVICE2_ESIZE 0x4000
+#define DEVICE1_OFFSET 0x0000
+#define ENV1_SIZE 0x4000
+#define DEVICE1_ESIZE 0x4000
+#define DEVICE2_OFFSET 0x0000
+#define ENV2_SIZE 0x4000
+#define DEVICE2_ESIZE 0x4000
Current configuration matches the environment layout of the TRAB
board.
Un-define HAVE_REDUND, if you want to use the utlities on a system
-that does not have support for redundant environment enabled. The
-DEVICEx_NAME constants define which MTD character device(s) is (are)
-to be used to access the environment. If HAVE_REDUND is undefined,
-DEVICE2_NAME is ignored, as is ENV2_SIZE and DEVICE2_ESIZE. ENVx_SIZE
-defines the size in bytes taken by the environment, which may be less
-then flash sector size, if the environment takes less then 1 sector.
+that does not have support for redundant environment enabled.
+If HAVE_REDUND is undefined, DEVICE2_NAME is ignored,
+as is ENV2_SIZE and DEVICE2_ESIZE.
+
+The DEVICEx_NAME constants define which MTD character devices are to
+be used to access the environment.
+
+The DEVICEx_OFFSET constants define the environment offset within the
+MTD character device.
+
+ENVx_SIZE defines the size in bytes taken by the environment, which
+may be less then flash sector size, if the environment takes less
+then 1 sector.
+
DEVICEx_ESIZE defines the size of the first sector in the flash
-partition where the environment resides. It is assumed that the
-environment is located in the first ENVx_SIZE bytes of the device
-DEVICEx_NAME.
+partition where the environment resides.
diff --git a/tools/env/fw_env.c b/tools/env/fw_env.c
index 5bf75ac2c20..87b41ea5940 100644
--- a/tools/env/fw_env.c
+++ b/tools/env/fw_env.c
@@ -41,6 +41,7 @@ typedef unsigned char uchar;
typedef struct envdev_s {
uchar devname[16]; /* Device name */
+ ulong devoff; /* Device offset */
ulong env_size; /* environment size */
ulong erase_size; /* device erase size */
} envdev_t;
@@ -49,16 +50,13 @@ static envdev_t envdevices[2];
static int curdev;
#define DEVNAME(i) envdevices[(i)].devname
+#define DEVOFFSET(i) envdevices[(i)].devoff
#define ENVSIZE(i) envdevices[(i)].env_size
#define DEVESIZE(i) envdevices[(i)].erase_size
#define CFG_ENV_SIZE ENVSIZE(curdev)
-#ifdef HAVE_REDUND
-#define ENV_SIZE (CFG_ENV_SIZE - sizeof(long) - 1)
-#else
-#define ENV_SIZE (CFG_ENV_SIZE - sizeof(long))
-#endif
+#define ENV_SIZE getenvsize()
typedef struct environment_s {
ulong crc; /* CRC32 over data bytes */
@@ -67,46 +65,103 @@ typedef struct environment_s {
} env_t;
static env_t environment;
-static int valid = 0;
-#ifdef HAVE_REDUND
+static int HaveRedundEnv = 0;
+
static uchar active_flag = 1;
static uchar obsolete_flag = 0;
-#endif
+
#define XMK_STR(x) #x
#define MK_STR(x) XMK_STR(x)
static uchar default_environment[] = {
-#ifdef CONFIG_BOOTARGS
+#if defined(CONFIG_BOOTARGS)
"bootargs=" CONFIG_BOOTARGS "\0"
#endif
-#ifdef CONFIG_BOOTCOMMAND
+#if defined(CONFIG_BOOTCOMMAND)
"bootcmd=" CONFIG_BOOTCOMMAND "\0"
#endif
-#if (CONFIG_BOOTDELAY >= 0)
+#if defined(CONFIG_RAMBOOTCOMMAND)
+ "ramboot=" CONFIG_RAMBOOTCOMMAND "\0"
+#endif
+#if defined(CONFIG_NFSBOOTCOMMAND)
+ "nfsboot=" CONFIG_NFSBOOTCOMMAND "\0"
+#endif
+#if defined(CONFIG_BOOTDELAY) && (CONFIG_BOOTDELAY >= 0)
"bootdelay=" MK_STR(CONFIG_BOOTDELAY) "\0"
#endif
-#if (CONFIG_BAUDRATE >= 0)
+#if defined(CONFIG_BAUDRATE) && (CONFIG_BAUDRATE >= 0)
"baudrate=" MK_STR(CONFIG_BAUDRATE) "\0"
#endif
+#ifdef CONFIG_LOADS_ECHO
+ "loads_echo=" MK_STR(CONFIG_LOADS_ECHO) "\0"
+#endif
#ifdef CONFIG_ETHADDR
"ethaddr=" MK_STR(CONFIG_ETHADDR) "\0"
#endif
+#ifdef CONFIG_ETH1ADDR
+ "eth1addr=" MK_STR(CONFIG_ETH1ADDR) "\0"
+#endif
+#ifdef CONFIG_ETH2ADDR
+ "eth2addr=" MK_STR(CONFIG_ETH2ADDR) "\0"
+#endif
+#ifdef CONFIG_ETHPRIME
+ "ethprime=" CONFIG_ETHPRIME "\0"
+#endif
#ifdef CONFIG_IPADDR
"ipaddr=" MK_STR(CONFIG_IPADDR) "\0"
#endif
#ifdef CONFIG_SERVERIP
"serverip=" MK_STR(CONFIG_SERVERIP) "\0"
#endif
- "\0"
+#ifdef CFG_AUTOLOAD
+ "autoload=" CFG_AUTOLOAD "\0"
+#endif
+#ifdef CONFIG_ROOTPATH
+ "rootpath=" MK_STR(CONFIG_ROOTPATH) "\0"
+#endif
+#ifdef CONFIG_GATEWAYIP
+ "gatewayip=" MK_STR(CONFIG_GATEWAYIP) "\0"
+#endif
+#ifdef CONFIG_NETMASK
+ "netmask=" MK_STR(CONFIG_NETMASK) "\0"
+#endif
+#ifdef CONFIG_HOSTNAME
+ "hostname=" MK_STR(CONFIG_HOSTNAME) "\0"
+#endif
+#ifdef CONFIG_BOOTFILE
+ "bootfile=" MK_STR(CONFIG_BOOTFILE) "\0"
+#endif
+#ifdef CONFIG_LOADADDR
+ "loadaddr=" MK_STR(CONFIG_LOADADDR) "\0"
+#endif
+#ifdef CONFIG_PREBOOT
+ "preboot=" CONFIG_PREBOOT "\0"
+#endif
+#ifdef CONFIG_CLOCKS_IN_MHZ
+ "clocks_in_mhz=" "1" "\0"
+#endif
+#ifdef CONFIG_EXTRA_ENV_SETTINGS
+ CONFIG_EXTRA_ENV_SETTINGS
+#endif
+ "\0" /* Termimate env_t data with 2 NULs */
};
static int flash_io (int mode);
static uchar *envmatch(uchar *s1, uchar *s2);
static int env_init(void);
static int parse_config(void);
-
+#if defined(CONFIG_FILE)
+static int get_config(char *);
+#endif
+static inline ulong getenvsize(void)
+{
+ ulong rc = CFG_ENV_SIZE - sizeof(long);
+ if (HaveRedundEnv)
+ rc -= sizeof(char);
+ return rc;
+}
/*
* Search the environment for a variable.
@@ -338,34 +393,37 @@ static int flash_io (int mode)
return (-1);
}
- len = sizeof(environment.crc) + sizeof(environment.flags);
+ len = sizeof(environment.crc);
+ if (HaveRedundEnv) {
+ len += sizeof(environment.flags);
+ }
if (mode == O_RDWR) {
-#ifdef HAVE_REDUND
- /* switch to next partition for writing */
- otherdev = !curdev;
- if ((fdr = open(DEVNAME(otherdev), mode)) < 0) {
- fprintf (stderr,
- "Can't open %s: %s\n",
- DEVNAME(otherdev), strerror(errno));
- return (-1);
+ if (HaveRedundEnv) {
+ /* switch to next partition for writing */
+ otherdev = !curdev;
+ if ((fdr = open(DEVNAME(otherdev), mode)) < 0) {
+ fprintf (stderr,
+ "Can't open %s: %s\n",
+ DEVNAME(otherdev), strerror(errno));
+ return (-1);
+ }
+ } else {
+ otherdev = curdev;
+ fdr = fd;
}
-#else
- otherdev = curdev;
- fdr = fd;
- len = sizeof(environment.crc);
-#endif
printf("Unlocking flash...\n");
erase.length = DEVESIZE(otherdev);
- erase.start = 0;
+ erase.start = DEVOFFSET(otherdev);
ioctl (fdr, MEMUNLOCK, &erase);
-#ifdef HAVE_REDUND
- erase.length = DEVESIZE(curdev);
- erase.start = 0;
- ioctl (fd, MEMUNLOCK, &erase);
- environment.flags = active_flag;
-#endif
+ if (HaveRedundEnv) {
+ erase.length = DEVESIZE(curdev);
+ erase.start = DEVOFFSET(curdev);
+ ioctl (fd, MEMUNLOCK, &erase);
+ environment.flags = active_flag;
+ }
+
printf("Done\n");
resid = DEVESIZE(otherdev) - CFG_ENV_SIZE;
if (resid) {
@@ -375,22 +433,16 @@ static int flash_io (int mode)
resid, strerror(errno));
return (-1);
}
- if (lseek (fdr, CFG_ENV_SIZE, SEEK_SET) == -1) {
+ if (lseek (fdr, DEVOFFSET(otherdev) + CFG_ENV_SIZE, SEEK_SET) == -1) {
fprintf (stderr,
"seek error on %s: %s\n",
- DEVNAME(curdev), strerror(errno));
+ DEVNAME(otherdev), strerror(errno));
return (-1);
}
if ((rc = read (fdr, data, resid)) != resid) {
fprintf (stderr,
"read error on %s: %s\n",
- DEVNAME(curdev), strerror(errno));
- return (-1);
- }
- if (lseek (fdr, 0, SEEK_SET) == -1) {
- fprintf (stderr,
- "seek error on %s: %s\n",
- DEVNAME(curdev), strerror(errno));
+ DEVNAME(otherdev), strerror(errno));
return (-1);
}
}
@@ -398,6 +450,7 @@ static int flash_io (int mode)
printf("Erasing old environment...\n");
erase.length = DEVESIZE(otherdev);
+ erase.start = DEVOFFSET(otherdev);
if (ioctl (fdr, MEMERASE, &erase) != 0) {
fprintf (stderr, "MTD erase error on %s: %s\n",
DEVNAME(otherdev), strerror(errno));
@@ -407,6 +460,12 @@ static int flash_io (int mode)
printf("Done\n");
printf("Writing environment to %s...\n",DEVNAME(otherdev));
+ if (lseek (fdr, DEVOFFSET(otherdev), SEEK_SET) == -1) {
+ fprintf (stderr,
+ "seek error on %s: %s\n",
+ DEVNAME(otherdev), strerror(errno));
+ return (-1);
+ }
if (write(fdr, &environment, len) != len) {
fprintf (stderr,
"CRC write error on %s: %s\n",
@@ -428,43 +487,47 @@ static int flash_io (int mode)
}
free(data);
}
-#ifdef HAVE_REDUND
- /* change flag on current active env partition */
- if (lseek (fd, sizeof(ulong), SEEK_SET) == -1) {
- fprintf (stderr,
- "seek error on %s: %s\n",
- DEVNAME(curdev), strerror(errno));
- return (-1);
- }
- if (write (fd, &obsolete_flag, sizeof(obsolete_flag)) !=
- sizeof(obsolete_flag)) {
- fprintf (stderr,
- "Write error on %s: %s\n",
- DEVNAME(curdev), strerror(errno));
- return (-1);
+ if (HaveRedundEnv) {
+ /* change flag on current active env partition */
+ if (lseek (fd, DEVOFFSET(curdev) + sizeof(ulong), SEEK_SET) == -1) {
+ fprintf (stderr,
+ "seek error on %s: %s\n",
+ DEVNAME(curdev), strerror(errno));
+ return (-1);
+ }
+ if (write (fd, &obsolete_flag, sizeof(obsolete_flag)) !=
+ sizeof(obsolete_flag)) {
+ fprintf (stderr,
+ "Write error on %s: %s\n",
+ DEVNAME(curdev), strerror(errno));
+ return (-1);
+ }
}
-#endif
printf("Done\n");
printf("Locking ...\n");
erase.length = DEVESIZE(otherdev);
- erase.start = 0;
+ erase.start = DEVOFFSET(otherdev);
ioctl (fdr, MEMLOCK, &erase);
-#ifdef HAVE_REDUND
- erase.length = DEVESIZE(curdev);
- erase.start = 0;
- ioctl (fd, MEMLOCK, &erase);
- if (close(fdr)) {
- fprintf (stderr,
- "I/O error on %s: %s\n",
- DEVNAME(otherdev), strerror(errno));
- return (-1);
+ if (HaveRedundEnv) {
+ erase.length = DEVESIZE(curdev);
+ erase.start = DEVOFFSET(curdev);
+ ioctl (fd, MEMLOCK, &erase);
+ if (close(fdr)) {
+ fprintf (stderr,
+ "I/O error on %s: %s\n",
+ DEVNAME(otherdev), strerror(errno));
+ return (-1);
+ }
}
-#endif
printf("Done\n");
} else {
-#ifndef HAVE_REDUND
- len = sizeof(environment.crc);
-#endif
+
+ if (lseek (fd, DEVOFFSET(curdev), SEEK_SET) == -1) {
+ fprintf (stderr,
+ "seek error on %s: %s\n",
+ DEVNAME(curdev), strerror(errno));
+ return (-1);
+ }
if (read (fd, &environment, len) != len) {
fprintf (stderr,
"CRC read error on %s: %s\n",
@@ -515,56 +578,52 @@ static int env_init(void)
{
int crc1, crc1_ok;
uchar *addr1;
-#ifdef HAVE_REDUND
+
int crc2, crc2_ok;
uchar flag1, flag2, *addr2;
-#endif
+ if (parse_config()) /* should fill envdevices */
+ return 1;
- if (!valid) {
-
- if (parse_config()) /* should fill envdevices */
- return 1;
-
- if ((addr1 = calloc (1, ENV_SIZE)) == NULL) {
- fprintf (stderr,
- "Not enough memory for environment (%ld bytes)\n",
- ENV_SIZE);
- return (errno);
- }
-
- /* read environment from FLASH to local buffer */
- environment.data = addr1;
- curdev = 0;
- if (flash_io (O_RDONLY)) {
- return (errno);
- }
-
- crc1_ok = ((crc1 = crc32(0, environment.data, ENV_SIZE))
- == environment.crc);
-#ifndef HAVE_REDUND
+ if ((addr1 = calloc (1, ENV_SIZE)) == NULL) {
+ fprintf (stderr,
+ "Not enough memory for environment (%ld bytes)\n",
+ ENV_SIZE);
+ return (errno);
+ }
+
+ /* read environment from FLASH to local buffer */
+ environment.data = addr1;
+ curdev = 0;
+ if (flash_io (O_RDONLY)) {
+ return (errno);
+ }
+
+ crc1_ok = ((crc1 = crc32(0, environment.data, ENV_SIZE))
+ == environment.crc);
+ if (!HaveRedundEnv) {
if (!crc1_ok) {
fprintf (stderr,
- "Warning: Bad CRC, using default environment\n");
+ "Warning: Bad CRC, using default environment\n");
environment.data = default_environment;
free(addr1);
}
-#else
+ } else {
flag1 = environment.flags;
curdev = 1;
if ((addr2 = calloc (1, ENV_SIZE)) == NULL) {
fprintf (stderr,
- "Not enough memory for environment (%ld bytes)\n",
- ENV_SIZE);
+ "Not enough memory for environment (%ld bytes)\n",
+ ENV_SIZE);
return (errno);
}
environment.data = addr2;
-
+
if (flash_io (O_RDONLY)) {
return (errno);
}
-
+
crc2_ok = ((crc2 = crc32(0, environment.data, ENV_SIZE))
== environment.crc);
flag2 = environment.flags;
@@ -585,7 +644,7 @@ static int env_init(void)
}
else if (! crc1_ok && ! crc2_ok) {
fprintf (stderr,
- "Warning: Bad CRC, using default environment\n");
+ "Warning: Bad CRC, using default environment\n");
environment.data = default_environment;
curdev = 0;
free(addr2);
@@ -626,8 +685,6 @@ static int env_init(void)
curdev = 1;
free(addr1);
}
-#endif
- valid = 1;
}
return (0);
}
@@ -637,26 +694,75 @@ static int parse_config()
{
struct stat st;
- if (stat (DEVICE1_NAME, &st)) {
- fprintf (stderr,
- "Cannot access MTD device %s: %s\n",
- DEVICE1_NAME, strerror(errno));
+#if defined(CONFIG_FILE)
+ /* Fills in DEVNAME(), ENVSIZE(), DEVESIZE(). Or don't. */
+ if (get_config(CONFIG_FILE)) {
+ fprintf (stderr,
+ "Cannot parse config file: %s\n",
+ strerror(errno));
return 1;
}
+#else
strcpy(DEVNAME(0), DEVICE1_NAME);
+ DEVOFFSET(0) = DEVICE1_OFFSET;
ENVSIZE(0) = ENV1_SIZE;
DEVESIZE(0) = DEVICE1_ESIZE;
#ifdef HAVE_REDUND
- if (stat (DEVICE2_NAME, &st)) {
- fprintf (stderr,
- "Cannot access MTD device %s: %s\n",
- DEVICE2_NAME, strerror(errno));
- return 1;
- }
strcpy(DEVNAME(1), DEVICE2_NAME);
+ DEVOFFSET(1) = DEVICE2_OFFSET;
ENVSIZE(1) = ENV2_SIZE;
DEVESIZE(1) = DEVICE2_ESIZE;
+ HaveRedundEnv = 1;
#endif
+#endif
+ if (stat (DEVNAME(0), &st)) {
+ fprintf (stderr,
+ "Cannot access MTD device %s: %s\n",
+ DEVNAME(0), strerror(errno));
+ return 1;
+ }
+
+ if (HaveRedundEnv && stat (DEVNAME(1), &st)) {
+ fprintf (stderr,
+ "Cannot access MTD device %s: %s\n",
+ DEVNAME(2), strerror(errno));
+ return 1;
+ }
return 0;
}
+
+#if defined(CONFIG_FILE)
+static int get_config (char *fname)
+{
+ FILE *fp;
+ int i = 0;
+ int rc;
+ char dump[128];
+
+ if ((fp = fopen(fname, "r")) == NULL) {
+ return 1;
+ }
+
+ while ((i < 2) &&
+ ((rc = fscanf (fp, "%s %lx %lx %lx",
+ DEVNAME(i), &DEVOFFSET(i), &ENVSIZE(i), &DEVESIZE(i))) != EOF)) {
+
+ /* Skip incomplete conversions and comment strings */
+ if ((rc < 3) || (*DEVNAME(i) == '#')) {
+ fgets (dump, sizeof(dump), fp); /* Consume till end */
+ continue;
+ }
+
+ i++;
+ }
+ fclose(fp);
+
+ HaveRedundEnv = i - 1;
+ if (!i) { /* No valid entries found */
+ errno = EINVAL;
+ return 1;
+ } else
+ return 0;
+}
+#endif
diff --git a/tools/env/fw_env.config b/tools/env/fw_env.config
new file mode 100644
index 00000000000..2432bd866c5
--- /dev/null
+++ b/tools/env/fw_env.config
@@ -0,0 +1,7 @@
+# Configuration file for fw_(printenv/saveenv) utility.
+# Up to two entries are valid, in this case the redundand
+# environment sector is assumed present.
+
+# MTD device name Device offset Env. size Flash sector size
+/dev/mtd1 0x0000 0x4000 0x4000
+/dev/mtd2 0x0000 0x4000 0x4000
diff --git a/tools/env/fw_env.h b/tools/env/fw_env.h
index d98edc9975d..7d7be041573 100644
--- a/tools/env/fw_env.h
+++ b/tools/env/fw_env.h
@@ -21,11 +21,21 @@
* MA 02111-1307 USA
*/
+/*
+ * To build the utility with the run-time configuration
+ * uncomment the next line.
+ * See included "fw_env.config" sample file (TRAB board)
+ * for notes on configuration.
+ */
+/*#define CONFIG_FILE "/etc/fw_env.config" */
+
#define HAVE_REDUND /* For systems with 2 env sectors */
#define DEVICE1_NAME "/dev/mtd1"
#define DEVICE2_NAME "/dev/mtd2"
+#define DEVICE1_OFFSET 0x0000
#define ENV1_SIZE 0x4000
#define DEVICE1_ESIZE 0x4000
+#define DEVICE2_OFFSET 0x0000
#define ENV2_SIZE 0x4000
#define DEVICE2_ESIZE 0x4000
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-18 11:52:44 +0000