cmd: bootvx: Always get VxWorks bootline from env

So far VxWorks bootline can be contructed from various environment
variables, but when these variables do not exist we get these from
corresponding config macros. This is not helpful as it requires
rebuilding U-Boot, and to make sure these config macros take effect
we should not have these environment variables. This is a little
bit complex and confusing.

Now we change the logic to always contruct the bootline from
environments (the only single source), by adding two new variables
"bootdev" and "othbootargs", and adding some comments about network
related settings mentioning they are optional. The doc about the
bootline handling is also updated.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Tested-by: Hannes Schmelzer <oe5hpm@oevsv.at>

1 files changed, 66 insertions, 53 deletions

diff --git a/common/cmd_elf.c b/common/cmd_elf.c
index 6a09378..da70ef3 100644
--- a/common/cmd_elf.c
+++ b/common/cmd_elf.c
@@ -257,68 +257,83 @@ int do_bootvx(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 
 	/*
 	 * Use bootaddr to find the location in memory that VxWorks
-	 * will look for the bootline string. The default value for
-	 * PowerPC is LOCAL_MEM_LOCAL_ADRS + BOOT_LINE_OFFSET which
-	 * defaults to 0x4200.
+	 * will look for the bootline string. The default value is
+	 * (LOCAL_MEM_LOCAL_ADRS + BOOT_LINE_OFFSET) as defined by
+	 * VxWorks BSP. For example, on PowerPC it defaults to 0x4200.
 	 */
 	tmp = getenv("bootaddr");
-	if (!tmp)
-		bootaddr = CONFIG_SYS_VXWORKS_BOOT_ADDR;
-	else
-		bootaddr = simple_strtoul(tmp, NULL, 16);
-
-	/*
-	 * Check to see if the bootline is defined in the 'bootargs'
-	 * parameter. If it is not defined, we may be able to
-	 * construct the info.
-	 */
-	bootline = getenv("bootargs");
-	if (bootline) {
-		memcpy((void *)bootaddr, bootline,
-		       max(strlen(bootline), (size_t)255));
-		flush_cache(bootaddr, max(strlen(bootline), (size_t)255));
+	if (!tmp) {
+		printf("## VxWorks bootline address not specified\n");
 	} else {
-		ptr = sprintf(build_buf, CONFIG_SYS_VXWORKS_BOOT_DEVICE);
-		tmp = getenv("bootfile");
-		if (tmp)
-			ptr += sprintf(build_buf + ptr, "%s:%s ",
-				       CONFIG_SYS_VXWORKS_SERVERNAME, tmp);
-		else
-			ptr += sprintf(build_buf + ptr, "%s:file ",
-				       CONFIG_SYS_VXWORKS_SERVERNAME);
+		bootaddr = simple_strtoul(tmp, NULL, 16);
 
-		tmp = getenv("ipaddr");
-		if (tmp) {
-			ptr += sprintf(build_buf + ptr, "e=%s", tmp);
-			tmp = getenv("netmask");
+		/*
+		 * Check to see if the bootline is defined in the 'bootargs'
+		 * parameter. If it is not defined, we may be able to
+		 * construct the info.
+		 */
+		bootline = getenv("bootargs");
+		if (bootline) {
+			memcpy((void *)bootaddr, bootline,
+			       max(strlen(bootline), (size_t)255));
+			flush_cache(bootaddr, max(strlen(bootline),
+						  (size_t)255));
+		} else {
+			tmp = getenv("bootdev");
+			if (tmp)
+				ptr = sprintf(build_buf, tmp);
+			else
+				printf("## VxWorks boot device not specified\n");
+
+			tmp = getenv("bootfile");
+			if (tmp)
+				ptr += sprintf(build_buf + ptr,
+					       "host:%s ", tmp);
+			else
+				ptr += sprintf(build_buf + ptr,
+					       "host:vxWorks ");
+
+			/*
+			 * The following parameters are only needed if 'bootdev'
+			 * is an ethernet device, otherwise they are optional.
+			 */
+			tmp = getenv("ipaddr");
 			if (tmp) {
-				__be32 addr = getenv_ip("netmask").s_addr;
-				ptr += sprintf(build_buf + ptr, ":%08x ",
-					       ntohl(addr));
-			} else {
-				ptr += sprintf(build_buf + ptr, " ");
+				ptr += sprintf(build_buf + ptr, "e=%s", tmp);
+				tmp = getenv("netmask");
+				if (tmp) {
+					u32 mask = getenv_ip("netmask").s_addr;
+					ptr += sprintf(build_buf + ptr,
+						       ":%08x ", ntohl(mask));
+				} else {
+					ptr += sprintf(build_buf + ptr, " ");
+				}
 			}
-		}
 
-		tmp = getenv("serverip");
-		if (tmp)
-			ptr += sprintf(build_buf + ptr, "h=%s ", tmp);
+			tmp = getenv("serverip");
+			if (tmp)
+				ptr += sprintf(build_buf + ptr, "h=%s ", tmp);
 
-		tmp = getenv("gatewayip");
-		if (tmp)
-			ptr += sprintf(build_buf + ptr, "g=%s ", tmp);
+			tmp = getenv("gatewayip");
+			if (tmp)
+				ptr += sprintf(build_buf + ptr, "g=%s ", tmp);
 
-		tmp = getenv("hostname");
-		if (tmp)
-			ptr += sprintf(build_buf + ptr, "tn=%s ", tmp);
+			tmp = getenv("hostname");
+			if (tmp)
+				ptr += sprintf(build_buf + ptr, "tn=%s ", tmp);
 
-#ifdef CONFIG_SYS_VXWORKS_ADD_PARAMS
-		ptr += sprintf(build_buf + ptr, CONFIG_SYS_VXWORKS_ADD_PARAMS);
-#endif
+			tmp = getenv("othbootargs");
+			if (tmp)
+				ptr += sprintf(build_buf + ptr, tmp);
+
+			memcpy((void *)bootaddr, build_buf,
+			       max(strlen(build_buf), (size_t)255));
+			flush_cache(bootaddr, max(strlen(build_buf),
+						  (size_t)255));
+		}
 
-		memcpy((void *)bootaddr, build_buf,
-		       max(strlen(build_buf), (size_t)255));
-		flush_cache(bootaddr, max(strlen(build_buf), (size_t)255));
+		printf("## Using bootline (@ 0x%lx): %s\n", bootaddr,
+		       (char *)bootaddr);
 	}
 
 	/*
@@ -331,8 +346,6 @@ int do_bootvx(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 	else
 		puts("## Not an ELF image, assuming binary\n");
 
-	printf("## Using bootline (@ 0x%lx): %s\n", bootaddr,
-	       (char *)bootaddr);
 	printf("## Starting vxWorks at 0x%08lx ...\n", addr);
 
 	dcache_disable();