Documentation updates

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3388 42af7a65-404d-4744-a932-0658087f49c3

7 files changed, 213 insertions, 119 deletions

diff --git a/nuttx/Documentation/NuttX.html b/nuttx/Documentation/NuttX.html
index a7d66da8c..1ac727263 100644
--- a/nuttx/Documentation/NuttX.html
+++ b/nuttx/Documentation/NuttX.html
@@ -8,7 +8,7 @@
   <tr align="center" bgcolor="#e4e4e4">
     <td>
       <h1><big><font color="#3c34ec"><i>NuttX RTOS</i></font></big></h1>
-      <p>Last Updated: March 15, 2011</p>
+      <p>Last Updated: March 16, 2011</p>
     </td>
   </tr>
 </table>
@@ -2200,6 +2200,8 @@ nuttx-5.20 2011-xx-xx Gregory Nutt &lt;spudmonkey@racsa.co.cr&gt;
     * drivers/net/slip.c -- SLIP is now basically functional on the
       LPC17xx with some caveats as described in the TODO list under
       LPC17xx.
+    * arch/x86/include/i486/irq.h -- Fix irqrestore() macro... it was not
+      correctly re-enabling interrupts.
 
 apps-5.20 2011-xx-xx Gregory Nutt &lt;spudmonkey@racsa.co.cr&gt;
 
diff --git a/nuttx/Documentation/NuttxPortingGuide.html b/nuttx/Documentation/NuttxPortingGuide.html
index c9d7f6bd2..d7f65090f 100644
--- a/nuttx/Documentation/NuttxPortingGuide.html
+++ b/nuttx/Documentation/NuttxPortingGuide.html
@@ -12,7 +12,7 @@
       <h1><big><font color="#3c34ec">
         <i>NuttX RTOS Porting Guide</i>
       </font></big></h1>
-      <p>Last Updated: March 12, 2011</p>
+      <p>Last Updated: March 16, 2011</p>
     </td>
   </tr>
 </table>
@@ -3305,16 +3305,17 @@ build
   </li>
   <li>
     <code>CONFIG_NET_SLIP</code>: Selects the Serial Line Internet Protocol (SLIP) data link layer.
-     The default data link layer for uIP is Ethernet.
-     If <code>CONFIG_NET_SLIP</code> is defined in the NuttX header file, then SLIP will be supported.
-     The basic differences between the SLIP and Ethernet configurations is that when SLIP is selected:
-     <ul>
-       <li>The link level header (that comes before the IP header) is omitted.</li>
-       <li>All MAC address processing is suppressed.</li>
-       <li>ARP is disabled.</li>
-     </ul>
-     If <code>CONFIG_NET_SLIP</code> is not supported, then Ethernet will be used
-     (there is no need to define anything special in the configuration file to use Ethernet -- it is the default).
+     (This selection is discussed further <a href="#slipdriver">below</a>).
+  </li>
+  <li>
+    <code>CONFIG_NET_NOINTS</code>: <code>CONFIG_NET_NOINT</code> indicates that uIP not called from the interrupt level.
+    If <code>CONFIG_NET_NOINTS</code> is defined, critical sections will be managed with semaphores;
+    Otherwise, it assumed that uIP will be called from interrupt level handling and critical sections will be managed by enabling and disabling interrupts.
+  </li>
+  <li>
+    <code>CONFIG_NET_MULTIBUFFER</code>: Traditionally, uIP has used a single buffer for all incoming and outgoing traffic.
+    If this configuration is selected, then the driver can manage multiple I/O buffers and can, for example, be filling one input buffer while sending another output buffer.
+    Or, as another example, the driver may support queuing of concurrent input/ouput and output transfers for better performance.
   </li>
   <li>
     <code>CONFIG_NET_IPv6</code>: Build in support for IPv6
@@ -3408,6 +3409,43 @@ build
   </li>
 </ul>
 
+<h3><a name="slipdriver">SLIP</a></h3>
+<p>
+  The NuttX SLIP driver supports point-to-point IP communications over a serial port.
+  The default data link layer for uIP is Ethernet.
+  If <code>CONFIG_NET_SLIP</code> is defined in the NuttX configuration file, then SLIP will be supported.
+  The basic differences between the SLIP and Ethernet configurations is that when SLIP is selected:
+   <ul>
+     <li>The link level header (that comes before the IP header) is omitted.</li>
+     <li>All MAC address processing is suppressed.</li>
+     <li>ARP is disabled.</li>
+   </ul>
+   If <code>CONFIG_NET_SLIP</code> is not selected, then Ethernet will be used
+   (there is no need to define anything special in the configuration file to use Ethernet -- it is the default).
+</p>
+<ul>
+  <li>
+    <code>CONFIG_NET_SLIP</code>: Enables building of the SLIP driver.
+    SLIP requires at least one IP protocols selected and the following additional network settings: <code>CONFIG_NET_NOINTS</code> and <code>CONFIG_NET_MULTIBUFFER</code>.
+    <code>CONFIG_NET_BUFSIZE</code> <i>must</i> be set to 296.
+    Other optional configuration settings that affect the SLIP driver: <code>CONFIG_NET_STATISTICS</code>.
+    Default: Ethernet.
+  </li>
+  <p>
+    If SLIP is selected, then the following SLIP options are available:
+  </p>
+  <li>
+    <code>CONFIG_CLIP_NINTERFACES</code>: Selects the number of physical SLIP interfaces to support.  Default: 1
+  </li>
+  <li>
+    <code>CONFIG_SLIP_STACKSIZE</code>: Select the stack size of the SLIP RX and TX tasks.  Default: 2048
+  </li>
+  <li>
+    <code>CONFIG_SLIP_DEFPRIO</code>: The priority of the SLIP RX and TX tasks. Default: 128
+  </li>
+  </li>
+</ul>
+
 <h3>UIP Network Utilities</h3>
 <ul>
   <li>
diff --git a/nuttx/arch/README.txt b/nuttx/arch/README.txt
index 8bcdda6e6..fdcf915ec 100644
--- a/nuttx/arch/README.txt
+++ b/nuttx/arch/README.txt
@@ -271,8 +271,6 @@ arch/x86 - Intel x86 architectures
     arch/x86/include/qemu and arch/x86/src/qemu
         This is the implementation of NuttX on the QEMU x86 simulation.
 
-    STATUS:  This is a work in progress and not yet ready for prime time.
-
 arch/z16 - ZiLOG 16-bit processors
     This directory holds related, 16-bit architectures from ZiLOG.  At
     present, this includes the following subdirectories:
diff --git a/nuttx/arch/x86/include/i486/irq.h b/nuttx/arch/x86/include/i486/irq.h
index 0abf384ea..9b1162671 100755
--- a/nuttx/arch/x86/include/i486/irq.h
+++ b/nuttx/arch/x86/include/i486/irq.h
@@ -54,6 +54,60 @@
  * Definitions
  ****************************************************************************/
 
+/* ISR and IRQ numbers */
+
+#define ISR0     0
+#define ISR1     1
+#define ISR2     2
+#define ISR3     3
+#define ISR4     4
+#define ISR5     5
+#define ISR6     6
+#define ISR7     7
+#define ISR8     8
+#define ISR9     9
+#define ISR10   10
+#define ISR11   11
+#define ISR12   12
+#define ISR13   13
+#define ISR14   14
+#define ISR15   15
+#define ISR16   16
+#define ISR17   17
+#define ISR18   18
+#define ISR19   19
+#define ISR20   20
+#define ISR21   21
+#define ISR22   22
+#define ISR23   23
+#define ISR24   24
+#define ISR25   25
+#define ISR26   26
+#define ISR27   27
+#define ISR28   28
+#define ISR29   29
+#define ISR30   30
+#define ISR31   31
+
+#define IRQ0    32
+#define IRQ1    33
+#define IRQ2    34
+#define IRQ3    35
+#define IRQ4    36
+#define IRQ5    37
+#define IRQ6    38
+#define IRQ7    39
+#define IRQ8    40
+#define IRQ9    41
+#define IRQ10   42
+#define IRQ11   43
+#define IRQ12   44
+#define IRQ13   45
+#define IRQ14   46
+#define IRQ15   47
+
+#define NR_IRQS 48
+
 /* Common register save structgure created by up_saveusercontext() and by
  * ISR/IRQ interrupt processing.
  */
diff --git a/nuttx/arch/x86/include/qemu/irq.h b/nuttx/arch/x86/include/qemu/irq.h
index ef834b271..23611b83c 100755
--- a/nuttx/arch/x86/include/qemu/irq.h
+++ b/nuttx/arch/x86/include/qemu/irq.h
@@ -48,58 +48,6 @@
  * Definitions
  ****************************************************************************/
 
-#define ISR0     0
-#define ISR1     1
-#define ISR2     2
-#define ISR3     3
-#define ISR4     4
-#define ISR5     5
-#define ISR6     6
-#define ISR7     7
-#define ISR8     8
-#define ISR9     9
-#define ISR10   10
-#define ISR11   11
-#define ISR12   12
-#define ISR13   13
-#define ISR14   14
-#define ISR15   15
-#define ISR16   16
-#define ISR17   17
-#define ISR18   18
-#define ISR19   19
-#define ISR20   20
-#define ISR21   21
-#define ISR22   22
-#define ISR23   23
-#define ISR24   24
-#define ISR25   25
-#define ISR26   26
-#define ISR27   27
-#define ISR28   28
-#define ISR29   29
-#define ISR30   30
-#define ISR31   31
-
-#define IRQ0    32
-#define IRQ1    33
-#define IRQ2    34
-#define IRQ3    35
-#define IRQ4    36
-#define IRQ5    37
-#define IRQ6    38
-#define IRQ7    39
-#define IRQ8    40
-#define IRQ9    41
-#define IRQ10   42
-#define IRQ11   43
-#define IRQ12   44
-#define IRQ13   45
-#define IRQ14   46
-#define IRQ15   47
-
-#define NR_IRQS 48
-
 /****************************************************************************
  * Public Types
  ****************************************************************************/
diff --git a/nuttx/arch/x86/src/i486/up_irq.c b/nuttx/arch/x86/src/i486/up_irq.c
index c77936b4f..627c727de 100755
--- a/nuttx/arch/x86/src/i486/up_irq.c
+++ b/nuttx/arch/x86/src/i486/up_irq.c
@@ -64,8 +64,8 @@
 
 static void idt_outb(uint8_t val, uint16_t addr) __attribute__((noinline));
 static void up_remappic(void);
-static void up_idtentry(struct idt_entry_s *entry, uint32_t base,
-                        uint16_t sel, uint8_t flags);
+static void up_idtentry(unsigned int index, uint32_t base, uint16_t sel,
+                        uint8_t flags);
 static inline void up_idtinit(void);
 
 /****************************************************************************
@@ -153,9 +153,11 @@ static void up_remappic(void)
  *
  ****************************************************************************/
 
-static void up_idtentry(struct idt_entry_s *entry, uint32_t base,
-                        uint16_t sel, uint8_t flags)
+static void up_idtentry(unsigned int index, uint32_t base, uint16_t sel,
+                       uint8_t flags)
 {
+  struct idt_entry_s *entry = &idt_entries[index];
+
   entry->lobase = base & 0xffff;
   entry->hibase = (base >> 16) & 0xffff;
 
@@ -189,56 +191,66 @@ static inline void up_idtinit(void)
 
   memset(&idt_entries, 0, sizeof(struct idt_entry_s)*256);
 
+  /* Re-map the PIC */
+
   up_remappic();
 
-  up_idtentry(&idt_entries[0],  (uint32_t)vector_isr0 , 0x08, 0x8e);
-  up_idtentry(&idt_entries[1],  (uint32_t)vector_isr1 , 0x08, 0x8e);
-  up_idtentry(&idt_entries[2],  (uint32_t)vector_isr2 , 0x08, 0x8e);
-  up_idtentry(&idt_entries[3],  (uint32_t)vector_isr3 , 0x08, 0x8e);
-  up_idtentry(&idt_entries[4],  (uint32_t)vector_isr4 , 0x08, 0x8e);
-  up_idtentry(&idt_entries[5],  (uint32_t)vector_isr5 , 0x08, 0x8e);
-  up_idtentry(&idt_entries[6],  (uint32_t)vector_isr6 , 0x08, 0x8e);
-  up_idtentry(&idt_entries[7],  (uint32_t)vector_isr7 , 0x08, 0x8e);
-  up_idtentry(&idt_entries[8],  (uint32_t)vector_isr8 , 0x08, 0x8e);
-  up_idtentry(&idt_entries[9],  (uint32_t)vector_isr9 , 0x08, 0x8e);
-  up_idtentry(&idt_entries[10], (uint32_t)vector_isr10, 0x08, 0x8e);
-  up_idtentry(&idt_entries[11], (uint32_t)vector_isr11, 0x08, 0x8e);
-  up_idtentry(&idt_entries[12], (uint32_t)vector_isr12, 0x08, 0x8e);
-  up_idtentry(&idt_entries[13], (uint32_t)vector_isr13, 0x08, 0x8e);
-  up_idtentry(&idt_entries[14], (uint32_t)vector_isr14, 0x08, 0x8e);
-  up_idtentry(&idt_entries[15], (uint32_t)vector_isr15, 0x08, 0x8e);
-  up_idtentry(&idt_entries[16], (uint32_t)vector_isr16, 0x08, 0x8e);
-  up_idtentry(&idt_entries[17], (uint32_t)vector_isr17, 0x08, 0x8e);
-  up_idtentry(&idt_entries[18], (uint32_t)vector_isr18, 0x08, 0x8e);
-  up_idtentry(&idt_entries[19], (uint32_t)vector_isr19, 0x08, 0x8e);
-  up_idtentry(&idt_entries[20], (uint32_t)vector_isr20, 0x08, 0x8e);
-  up_idtentry(&idt_entries[21], (uint32_t)vector_isr21, 0x08, 0x8e);
-  up_idtentry(&idt_entries[22], (uint32_t)vector_isr22, 0x08, 0x8e);
-  up_idtentry(&idt_entries[23], (uint32_t)vector_isr23, 0x08, 0x8e);
-  up_idtentry(&idt_entries[24], (uint32_t)vector_isr24, 0x08, 0x8e);
-  up_idtentry(&idt_entries[25], (uint32_t)vector_isr25, 0x08, 0x8e);
-  up_idtentry(&idt_entries[26], (uint32_t)vector_isr26, 0x08, 0x8e);
-  up_idtentry(&idt_entries[27], (uint32_t)vector_isr27, 0x08, 0x8e);
-  up_idtentry(&idt_entries[28], (uint32_t)vector_isr28, 0x08, 0x8e);
-  up_idtentry(&idt_entries[29], (uint32_t)vector_isr29, 0x08, 0x8e);
-  up_idtentry(&idt_entries[30], (uint32_t)vector_isr30, 0x08, 0x8e);
-  up_idtentry(&idt_entries[31], (uint32_t)vector_isr31, 0x08, 0x8e);
-  up_idtentry(&idt_entries[32], (uint32_t)vector_irq0,  0x08, 0x8e);
-  up_idtentry(&idt_entries[33], (uint32_t)vector_irq1,  0x08, 0x8e);
-  up_idtentry(&idt_entries[34], (uint32_t)vector_irq2,  0x08, 0x8e);
-  up_idtentry(&idt_entries[35], (uint32_t)vector_irq3,  0x08, 0x8e);
-  up_idtentry(&idt_entries[36], (uint32_t)vector_irq4,  0x08, 0x8e);
-  up_idtentry(&idt_entries[37], (uint32_t)vector_irq5,  0x08, 0x8e);
-  up_idtentry(&idt_entries[38], (uint32_t)vector_irq6,  0x08, 0x8e);
-  up_idtentry(&idt_entries[39], (uint32_t)vector_irq7,  0x08, 0x8e);
-  up_idtentry(&idt_entries[40], (uint32_t)vector_irq8,  0x08, 0x8e);
-  up_idtentry(&idt_entries[41], (uint32_t)vector_irq9,  0x08, 0x8e);
-  up_idtentry(&idt_entries[42], (uint32_t)vector_irq10, 0x08, 0x8e);
-  up_idtentry(&idt_entries[43], (uint32_t)vector_irq11, 0x08, 0x8e);
-  up_idtentry(&idt_entries[44], (uint32_t)vector_irq12, 0x08, 0x8e);
-  up_idtentry(&idt_entries[45], (uint32_t)vector_irq13, 0x08, 0x8e);
-  up_idtentry(&idt_entries[46], (uint32_t)vector_irq14, 0x08, 0x8e);
-  up_idtentry(&idt_entries[47], (uint32_t)vector_irq15, 0x08, 0x8e);
+  /* Set each ISR/IRQ to the appropriate vector with selector=8 and with
+   * 32-bit interrupt gate.  Interrupt gate (vs. trap gate) will leave
+   * interrupts enabled when the IRS/IRQ handler is entered.
+   */
+
+  up_idtentry(ISR0,  (uint32_t)vector_isr0 , 0x08, 0x8e);
+  up_idtentry(ISR1,  (uint32_t)vector_isr1 , 0x08, 0x8e);
+  up_idtentry(ISR2,  (uint32_t)vector_isr2 , 0x08, 0x8e);
+  up_idtentry(ISR3,  (uint32_t)vector_isr3 , 0x08, 0x8e);
+  up_idtentry(ISR4,  (uint32_t)vector_isr4 , 0x08, 0x8e);
+  up_idtentry(ISR5,  (uint32_t)vector_isr5 , 0x08, 0x8e);
+  up_idtentry(ISR6,  (uint32_t)vector_isr6 , 0x08, 0x8e);
+  up_idtentry(ISR7,  (uint32_t)vector_isr7 , 0x08, 0x8e);
+  up_idtentry(ISR8,  (uint32_t)vector_isr8 , 0x08, 0x8e);
+  up_idtentry(ISR9,  (uint32_t)vector_isr9 , 0x08, 0x8e);
+  up_idtentry(ISR10, (uint32_t)vector_isr10, 0x08, 0x8e);
+  up_idtentry(ISR11, (uint32_t)vector_isr11, 0x08, 0x8e);
+  up_idtentry(ISR12, (uint32_t)vector_isr12, 0x08, 0x8e);
+  up_idtentry(ISR13, (uint32_t)vector_isr13, 0x08, 0x8e);
+  up_idtentry(ISR14, (uint32_t)vector_isr14, 0x08, 0x8e);
+  up_idtentry(ISR15, (uint32_t)vector_isr15, 0x08, 0x8e);
+  up_idtentry(ISR16, (uint32_t)vector_isr16, 0x08, 0x8e);
+  up_idtentry(ISR17, (uint32_t)vector_isr17, 0x08, 0x8e);
+  up_idtentry(ISR18, (uint32_t)vector_isr18, 0x08, 0x8e);
+  up_idtentry(ISR19, (uint32_t)vector_isr19, 0x08, 0x8e);
+  up_idtentry(ISR20, (uint32_t)vector_isr20, 0x08, 0x8e);
+  up_idtentry(ISR21, (uint32_t)vector_isr21, 0x08, 0x8e);
+  up_idtentry(ISR22, (uint32_t)vector_isr22, 0x08, 0x8e);
+  up_idtentry(ISR23, (uint32_t)vector_isr23, 0x08, 0x8e);
+  up_idtentry(ISR24, (uint32_t)vector_isr24, 0x08, 0x8e);
+  up_idtentry(ISR25, (uint32_t)vector_isr25, 0x08, 0x8e);
+  up_idtentry(ISR26, (uint32_t)vector_isr26, 0x08, 0x8e);
+  up_idtentry(ISR27, (uint32_t)vector_isr27, 0x08, 0x8e);
+  up_idtentry(ISR28, (uint32_t)vector_isr28, 0x08, 0x8e);
+  up_idtentry(ISR29, (uint32_t)vector_isr29, 0x08, 0x8e);
+  up_idtentry(ISR30, (uint32_t)vector_isr30, 0x08, 0x8e);
+  up_idtentry(ISR31, (uint32_t)vector_isr31, 0x08, 0x8e);
+
+  up_idtentry(IRQ0,  (uint32_t)vector_irq0,  0x08, 0x8e);
+  up_idtentry(IRQ1,  (uint32_t)vector_irq1,  0x08, 0x8e);
+  up_idtentry(IRQ2,  (uint32_t)vector_irq2,  0x08, 0x8e);
+  up_idtentry(IRQ3,  (uint32_t)vector_irq3,  0x08, 0x8e);
+  up_idtentry(IRQ4,  (uint32_t)vector_irq4,  0x08, 0x8e);
+  up_idtentry(IRQ5,  (uint32_t)vector_irq5,  0x08, 0x8e);
+  up_idtentry(IRQ6,  (uint32_t)vector_irq6,  0x08, 0x8e);
+  up_idtentry(IRQ7,  (uint32_t)vector_irq7,  0x08, 0x8e);
+  up_idtentry(IRQ8,  (uint32_t)vector_irq8,  0x08, 0x8e);
+  up_idtentry(IRQ9,  (uint32_t)vector_irq9,  0x08, 0x8e);
+  up_idtentry(IRQ10, (uint32_t)vector_irq10, 0x08, 0x8e);
+  up_idtentry(IRQ11, (uint32_t)vector_irq11, 0x08, 0x8e);
+  up_idtentry(IRQ12, (uint32_t)vector_irq12, 0x08, 0x8e);
+  up_idtentry(IRQ13, (uint32_t)vector_irq13, 0x08, 0x8e);
+  up_idtentry(IRQ14, (uint32_t)vector_irq14, 0x08, 0x8e);
+  up_idtentry(IRQ15, (uint32_t)vector_irq15, 0x08, 0x8e);
+
+  /* Then program the IDT */
 
   idt_flush((uint32_t)&idt_ptr);
 }
diff --git a/nuttx/configs/README.txt b/nuttx/configs/README.txt
index 723656a85..55dc6bdd3 100644
--- a/nuttx/configs/README.txt
+++ b/nuttx/configs/README.txt
@@ -585,8 +585,20 @@ defconfig -- This is a configuration file similar to the Linux
 		CONFIG_ENC28J60_STATS - Collect network statistics
 		CONFIG_ENC28J60_HALFDUPPLEX - Default is full duplex
 
-	TCP/IP and UDP support via uIP
+	Networking support via uIP
 		CONFIG_NET - Enable or disable all network features
+		CONFIG_NET_NOINTS --  CONFIG_NET_NOINT indicates that uIP not called from
+		  the interrupt level.  If CONFIG_NET_NOINTS is defined, critical sections
+		  will be managed with semaphores; Otherwise, it assumed that uIP will be
+		  called from interrupt level handling and critical sections will be
+		  managed by enabling and disabling interrupts.
+		CONFIG_NET_MULTIBUFFER - Traditionally, uIP has used a single buffer
+		  for all incoming and outgoing traffic.  If this configuration is
+		  selected, then the driver can manage multiple I/O buffers and can,
+		  for example, be filling one input buffer while sending another
+		  output buffer.  Or, as another example, the driver may support
+		  queuing of concurrent input/ouput and output transfers for better
+		  performance.
 		CONFIG_NET_IPv6 - Build in support for IPv6
 		CONFIG_NSOCKET_DESCRIPTORS - Maximum number of socket descriptors
 		per task/thread.
@@ -632,6 +644,36 @@ defconfig -- This is a configuration file similar to the Linux
 		CONFIG_NET_FWCACHE_SIZE - number of packets to remember when
 		  looking for duplicates
 
+	SLIP Driver.  SLIP supports point-to-point IP communications over a serial
+		port.  The default data link layer for uIP is Ethernet. If CONFIG_NET_SLIP
+		is defined in the NuttX configuration file, then SLIP will be supported.
+		The basic differences between the SLIP and Ethernet configurations is that
+		when SLIP is selected: 
+
+		* The link level header (that comes before the IP header) is omitted. 
+		* All MAC address processing is suppressed. 
+		* ARP is disabled.
+
+		If CONFIG_NET_SLIP is not selected, then Ethernet will be used (there is
+		no need to define anything special in the configuration file to use
+		Ethernet -- it is the default). 
+
+		CONFIG_NET_SLIP -- Enables building of the SLIP driver. SLIP requires
+		  at least one IP protocols selected and the following additional
+		  network settings: CONFIG_NET_NOINTS and CONFIG_NET_MULTIBUFFER.
+		  CONFIG_NET_BUFSIZE *must* be set to 296.  Other optional configuration
+		  settings that affect the SLIP driver: CONFIG_NET_STATISTICS. 
+		  Default: Ethernet
+
+		If SLIP is selected, then the following SLIP options are available:
+
+		CONFIG_CLIP_NINTERFACES -- Selects the number of physical SLIP
+		  interfaces to support.  Default: 1
+		CONFIG_SLIP_STACKSIZE -- Select the stack size of the SLIP RX and
+		  TX tasks.  Default: 2048
+		CONFIG_SLIP_DEFPRIO - The priority of the SLIP RX and TX tasks.
+		  Default: 128
+
 	UIP Network Utilities
 		CONFIG_NET_DHCP_LIGHT - Reduces size of DHCP
 		CONFIG_NET_RESOLV_ENTRIES - Number of resolver entries