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authorHeiko Schocher <hs@denx.de>2009-02-10 09:38:52 +0100
committerBen Warren <biggerbadderben@gmail.com>2009-02-22 23:49:33 -0800
commit2f70c49e5b9813635ad73666aa30f304c7fdeda9 (patch)
tree57b6d6625de2648dab93e71cf74a7329c81c6adc
parentad2d16393e9f684e4a9255f42e8bfdd819b67a87 (diff)
downloadu-boot-linaro-stable-2f70c49e5b9813635ad73666aa30f304c7fdeda9.tar.gz
netloop: speed up NetLoop
NetLoop polls every cycle with getenv some environment variables. This is horribly slow, especially when the environment is big. This patch reads only the environment variables in NetLoop, when they were changed. Also moved the init part of the NetLoop function in a seperate function. Signed-off-by: Heiko Schocher <hs@denx.de> Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
-rw-r--r--common/cmd_nvedit.c6
-rw-r--r--include/common.h1
-rw-r--r--net/eth.c11
-rw-r--r--net/net.c134
4 files changed, 91 insertions, 61 deletions
diff --git a/common/cmd_nvedit.c b/common/cmd_nvedit.c
index 02b18ec32..68c673e7c 100644
--- a/common/cmd_nvedit.c
+++ b/common/cmd_nvedit.c
@@ -75,7 +75,12 @@ DECLARE_GLOBAL_DATA_PTR;
static const unsigned long baudrate_table[] = CONFIG_SYS_BAUDRATE_TABLE;
#define N_BAUDRATES (sizeof(baudrate_table) / sizeof(baudrate_table[0]))
+static int env_id = 1;
+int get_env_id (void)
+{
+ return env_id;
+}
/************************************************************************
* Command interface: print one or all environment variables
*/
@@ -160,6 +165,7 @@ int _do_setenv (int flag, int argc, char *argv[])
return 1;
}
+ env_id++;
/*
* search if variable with this name already exists
*/
diff --git a/include/common.h b/include/common.h
index afee1889a..b75ea60b8 100644
--- a/include/common.h
+++ b/include/common.h
@@ -269,6 +269,7 @@ void forceenv (char *, char *);
#ifdef CONFIG_AUTO_COMPLETE
int env_complete(char *var, int maxv, char *cmdv[], int maxsz, char *buf);
#endif
+int get_env_id (void);
void pci_init (void);
void pci_init_board(void);
diff --git a/net/eth.c b/net/eth.c
index ec2ef1a36..217e8853f 100644
--- a/net/eth.c
+++ b/net/eth.c
@@ -28,6 +28,9 @@
#if defined(CONFIG_CMD_NET) && defined(CONFIG_NET_MULTI)
+static char *act = NULL;
+static int env_changed_id = 0;
+
/*
* CPU and board-specific Ethernet initializations. Aliased function
* signals caller to move on
@@ -461,13 +464,17 @@ void eth_try_another(int first_restart)
#ifdef CONFIG_NET_MULTI
void eth_set_current(void)
{
- char *act;
struct eth_device* old_current;
+ int env_id;
if (!eth_current) /* XXX no current */
return;
- act = getenv("ethact");
+ env_id = get_env_id();
+ if ((act == NULL) || (env_changed_id != env_id)) {
+ act = getenv("ethact");
+ env_changed_id = env_id;
+ }
if (act != NULL) {
old_current = eth_current;
do {
diff --git a/net/net.c b/net/net.c
index 459baf4ea..a55f4d33f 100644
--- a/net/net.c
+++ b/net/net.c
@@ -209,6 +209,8 @@ uchar NetArpWaitPacketBuf[PKTSIZE_ALIGN + PKTALIGN];
ulong NetArpWaitTimerStart;
int NetArpWaitTry;
+int env_changed_id = 0;
+
void ArpRequest (void)
{
int i;
@@ -276,6 +278,78 @@ void ArpTimeoutCheck(void)
}
}
+int
+NetInitLoop(proto_t protocol)
+{
+ bd_t *bd = gd->bd;
+ int env_id = get_env_id ();
+
+ /* update only when the environment has changed */
+ if (env_changed_id == env_id)
+ return 0;
+
+ switch (protocol) {
+#if defined(CONFIG_CMD_NFS)
+ case NFS:
+#endif
+#if defined(CONFIG_CMD_PING)
+ case PING:
+#endif
+#if defined(CONFIG_CMD_SNTP)
+ case SNTP:
+#endif
+ case NETCONS:
+ case TFTP:
+ NetCopyIP(&NetOurIP, &bd->bi_ip_addr);
+ NetOurGatewayIP = getenv_IPaddr ("gatewayip");
+ NetOurSubnetMask= getenv_IPaddr ("netmask");
+ NetOurVLAN = getenv_VLAN("vlan");
+ NetOurNativeVLAN = getenv_VLAN("nvlan");
+
+ switch (protocol) {
+#if defined(CONFIG_CMD_NFS)
+ case NFS:
+#endif
+ case NETCONS:
+ case TFTP:
+ NetServerIP = getenv_IPaddr ("serverip");
+ break;
+#if defined(CONFIG_CMD_PING)
+ case PING:
+ /* nothing */
+ break;
+#endif
+#if defined(CONFIG_CMD_SNTP)
+ case SNTP:
+ /* nothing */
+ break;
+#endif
+ default:
+ break;
+ }
+
+ break;
+ case BOOTP:
+ case RARP:
+ /*
+ * initialize our IP addr to 0 in order to accept ANY
+ * IP addr assigned to us by the BOOTP / RARP server
+ */
+ NetOurIP = 0;
+ NetServerIP = getenv_IPaddr ("serverip");
+ NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */
+ NetOurNativeVLAN = getenv_VLAN("nvlan");
+ case CDP:
+ NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */
+ NetOurNativeVLAN = getenv_VLAN("nvlan");
+ break;
+ default:
+ break;
+ }
+ env_changed_id = env_id;
+ return 0;
+}
+
/**********************************************************************/
/*
* Main network processing loop.
@@ -340,65 +414,7 @@ restart:
* here on, this code is a state machine driven by received
* packets and timer events.
*/
-
- switch (protocol) {
-#if defined(CONFIG_CMD_NFS)
- case NFS:
-#endif
-#if defined(CONFIG_CMD_PING)
- case PING:
-#endif
-#if defined(CONFIG_CMD_SNTP)
- case SNTP:
-#endif
- case NETCONS:
- case TFTP:
- NetCopyIP(&NetOurIP, &bd->bi_ip_addr);
- NetOurGatewayIP = getenv_IPaddr ("gatewayip");
- NetOurSubnetMask= getenv_IPaddr ("netmask");
- NetOurVLAN = getenv_VLAN("vlan");
- NetOurNativeVLAN = getenv_VLAN("nvlan");
-
- switch (protocol) {
-#if defined(CONFIG_CMD_NFS)
- case NFS:
-#endif
- case NETCONS:
- case TFTP:
- NetServerIP = getenv_IPaddr ("serverip");
- break;
-#if defined(CONFIG_CMD_PING)
- case PING:
- /* nothing */
- break;
-#endif
-#if defined(CONFIG_CMD_SNTP)
- case SNTP:
- /* nothing */
- break;
-#endif
- default:
- break;
- }
-
- break;
- case BOOTP:
- case RARP:
- /*
- * initialize our IP addr to 0 in order to accept ANY
- * IP addr assigned to us by the BOOTP / RARP server
- */
- NetOurIP = 0;
- NetServerIP = getenv_IPaddr ("serverip");
- NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */
- NetOurNativeVLAN = getenv_VLAN("nvlan");
- case CDP:
- NetOurVLAN = getenv_VLAN("vlan"); /* VLANs must be read */
- NetOurNativeVLAN = getenv_VLAN("nvlan");
- break;
- default:
- break;
- }
+ NetInitLoop(protocol);
switch (net_check_prereq (protocol)) {
case 1: