From 47118057ea87c3883fbbd6b23d8a6bb44fab642e Mon Sep 17 00:00:00 2001
From: patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3>
Date: Mon, 26 Mar 2007 16:47:17 +0000
Subject: [PATCH] Create a place to hold board specific header files

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@146 42af7a65-404d-4744-a932-0658087f49c3
---
 ChangeLog                            |   1 +
 Documentation/NuttxPortingGuide.html |  14 +-
 Makefile                             |  17 ++-
 TODO                                 |   1 -
 arch/c5471/src/c5471.h               |  17 +--
 arch/c5471/src/up_internal.h         |  19 +--
 arch/c5471/src/up_leds.c             |  12 +-
 arch/dm320/src/dm320.h               |   9 +-
 arch/dm320/src/ntosd.h               | 104 -------------
 arch/pjrc-8051/src/pjrc.h            | 215 ---------------------------
 arch/pjrc-8051/src/up_internal.h     |   7 +-
 configs/README.txt                   |   7 +
 configs/c5471evm/Make.defs           |   2 +-
 configs/c5471evm/defconfig           |   4 +
 configs/m68332evb/Make.defs          |   2 +-
 configs/m68332evb/defconfig          |   4 +
 configs/ntosd-dm320/Make.defs        |   2 +-
 configs/ntosd-dm320/defconfig        |   4 +
 configs/pjrc-8051/defconfig          |   4 +
 configs/sim/defconfig                |   4 +
 examples/ostest/posixtimer.c         |   1 -
 lib/lib_sem.c                        |   6 +-
 22 files changed, 99 insertions(+), 357 deletions(-)
 delete mode 100644 arch/dm320/src/ntosd.h
 delete mode 100644 arch/pjrc-8051/src/pjrc.h

diff --git a/ChangeLog b/ChangeLog
index 13b02bf47a..7814921b2f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -86,6 +86,7 @@
 	* sched_setparam(), sched_setscheduler() now correctly set
 	  errno; pthread_setscheduler() now returns the correct errno.
 	* Added pthread_setschedprio().
+	* Added directories to hold board-specific header files
 	* Started m68322
 
 
diff --git a/Documentation/NuttxPortingGuide.html b/Documentation/NuttxPortingGuide.html
index f1ac32c485..c970198fce 100644
--- a/Documentation/NuttxPortingGuide.html
+++ b/Documentation/NuttxPortingGuide.html
@@ -173,12 +173,12 @@ below and discussed in the following paragraphs:</p>
 </p>
 <ul><pre>
 	&lt;<i>arch-name</i>&gt;
-	|-- include
+	|-- include/
 	|   |-- arch.h
 	|   |-- irq.h
 	|   |-- types.h
 	|   `-- limits.h
-	`-- src
+	`-- src/
 	    |-- Makefile
 	    `-- <i>(architecture-specific source files)</i>
 </pre></ul>
@@ -294,6 +294,7 @@ below and discussed in the following paragraphs:</p>
 </p>
 <ul><pre>
 	&lt;<i>board-name</i>&gt;
+	|-- include/
 	|-- Make.defs
 	|-- defconfig
 	`-- setenv.sh
@@ -301,6 +302,14 @@ below and discussed in the following paragraphs:</p>
 
 <h3><a name="#summaryofconfigfiles">2.3.2 Summary of Files</a></h3>
 <ul>
+  <li>
+    <code>include/</code>:
+    This directory contains board specific header files.
+    This directory will be linked as <code>include/arch/board</code> at configuration time
+    and can be included via <code>#include &lt;arch/board/header.h&gt;</code>.
+    These header file can only be included by files in <code>arch/&lt;arch-name&gt;/include/</code>
+    and <code>arch/&lt;arch-name&gt;/src/</code>.
+  </li>
   <li>
     <code>Make.defs</code>: This makefile fragment provides architecture and
     tool-specific build options.  It will be included by all other
@@ -316,6 +325,7 @@ below and discussed in the following paragraphs:</p>
       fragment may include ${TOPDIR}/.config to perform configuration
       specific settings.  For example, the CFLAGS will most likely be
       different if CONFIG_DEBUG=y.
+    </p>
   </li>
   <li>
     <code>defconfig</code>: This is a configuration file similar to the Linux
diff --git a/Makefile b/Makefile
index e41e9cbb15..34cc90910b 100644
--- a/Makefile
+++ b/Makefile
@@ -39,6 +39,7 @@ TOPDIR		= ${shell pwd}
 
 ARCH_DIR	= arch/$(CONFIG_ARCH)
 ARCH_SRC	= $(ARCH_DIR)/src
+BOARD_DIR	= configs/$(CONFIG_BOARD)
 
 SUBDIRS		= sched lib $(ARCH_SRC) mm fs drivers examples/$(CONFIG_EXAMPLE)
 
@@ -57,7 +58,7 @@ tools/mkconfig:
 include/nuttx/config.h: $(TOPDIR)/.config tools/mkconfig
 	tools/mkconfig $(TOPDIR) > include/nuttx/config.h
 
-include/arch: include/nuttx/config.h
+include/arch: Make.defs
 	@if [ -e include/arch ]; then \
 		if [ -h include/arch ]; then \
 			rm -f include/arch ; \
@@ -68,11 +69,23 @@ include/arch: include/nuttx/config.h
 	fi
 	@ln -s $(TOPDIR)/$(ARCH_DIR)/include include/arch
 
-context: check_context include/nuttx/config.h include/arch
+include/arch/board: Make.defs include/arch
+	@if [ -e include/arch/board ]; then \
+		if [ -h include/arch/board ]; then \
+			rm -f include/arch/board ; \
+		else \
+			echo "include/arch/board exists but is not a symbolic link" ; \
+			exit 1 ; \
+		fi ; \
+	fi
+	@ln -s $(TOPDIR)/$(BOARD_DIR)/include include/arch/board
+
+context: check_context include/nuttx/config.h include/arch include/arch/board
 
 clean_context:
 	rm -f include/nuttx/config.h
 	rm -f include/arch
+	rm -f include/arch/board
 
 check_context:
 	@if [ ! -e ${TOPDIR}/.config -o ! -e ${TOPDIR}/Make.defs ]; then \
diff --git a/TODO b/TODO
index cd6e9b85ee..9f83c3e42e 100644
--- a/TODO
+++ b/TODO
@@ -9,7 +9,6 @@ Task/Scheduler
 - Implement sys/mman.h and functions
 - Implement sys/wait.h and functions
 - Implement priority inheritance
-- Implement vfork().  Could be tricky because of stack references.
 - Make the system timer frequency configurable via defconfig.  See:
    _POSIX_CLOCKRES_MIN in limits.h
    CLK_TCK in time.h
diff --git a/arch/c5471/src/c5471.h b/arch/c5471/src/c5471.h
index df49a7eb00..b91c9f3d15 100644
--- a/arch/c5471/src/c5471.h
+++ b/arch/c5471/src/c5471.h
@@ -40,10 +40,18 @@
  * Included Files
  ************************************************************/
 
+#include <nuttx/config.h>
+
 #ifndef __ASSEMBLY__
 # include <sys/types.h>
 #endif
 
+#if defined(CONFIG_BOARD_C5471EVM)
+# include <arch/board/c5471evm.h>
+#else
+# warning "Undefined C5471 Board"
+#endif
+
 /************************************************************
  * Definitions
  ************************************************************/
@@ -72,10 +80,6 @@
 #define CC_Z_BIT               (1 << 30)
 #define CC_N_BIT               (1 << 31)
 
-/* Clocking *************************************************/
-
-#define C5471_CLOCK            47500000 /* 47.5 MHz */
-
 /* UARTs ****************************************************/
 
 #define UART_IRDA_BASE         0xffff0800
@@ -370,11 +374,6 @@ static inline void putreg16(uint16 val, unsigned int addr)
  __asm__ __volatile__("\tstrh %0, [%1]\n\t": : "r"(val), "r"(addr));
 }
 
-/* Most C5471 registers are 16-bits wide */
-
-#define getreg(a)   getreg16(1)
-#define putreg(v,a) putreg16(v,a)
-
 #endif
 
 #endif  /* __C5471_H */
diff --git a/arch/c5471/src/up_internal.h b/arch/c5471/src/up_internal.h
index c50a78483e..60cc252732 100644
--- a/arch/c5471/src/up_internal.h
+++ b/arch/c5471/src/up_internal.h
@@ -40,6 +40,14 @@
  * Included Files
  ************************************************************/
 
+#include <nuttx/config.h>
+
+#if defined(CONFIG_BOARD_C5471EVM)
+# include <arch/board/c5471evm.h>
+#else
+# warning "Undefined C5471 Board"
+#endif
+
 /************************************************************
  * Definitions
  ************************************************************/
@@ -55,17 +63,6 @@
 #undef  CONFIG_SUPPRESS_UART_CONFIG   /* Do not reconfig UART */
 #undef  CONFIG_DUMP_ON_EXIT           /* Dump task state on exit */
 
-/* LED definitions */
-
-#define LED_STARTED                 0
-#define LED_HEAPALLOCATE            1
-#define LED_IRQSENABLED             2
-#define LED_STACKCREATED            3
-#define LED_INIRQ                   4
-#define LED_SIGNAL                  5
-#define LED_ASSERTION               6
-#define LED_PANIC                   7
-
 /************************************************************
  * Public Types
  ************************************************************/
diff --git a/arch/c5471/src/up_leds.c b/arch/c5471/src/up_leds.c
index ee1241edeb..9ecd74d865 100644
--- a/arch/c5471/src/up_leds.c
+++ b/arch/c5471/src/up_leds.c
@@ -45,8 +45,12 @@
  * Definitions
  ************************************************************/
 
-#define CS2  *(volatile uint32*)0xffff2e08
-#define LEDS *(volatile uint32*)0x01000000
+#if defined(CONFIG_BOARD_C5471EVM)
+# define CS2  *(volatile uint32*)0xffff2e08
+# define LEDS *(volatile uint32*)0x01000000
+#else 
+# warning "Undefined C5471 board"
+#endif
 
 /************************************************************
  * Private Data
@@ -69,7 +73,8 @@ static uint32 g_ledstate;
 #ifdef CONFIG_C5471_LEDS
 void up_ledinit(void)
 {
-  /* Enable acces to LEDs */
+#if defined(CONFIG_BOARD_C5471EVM)
+  /* Enable access to LEDs */
 
   CS2 = 0x000013db;
 
@@ -77,6 +82,7 @@ void up_ledinit(void)
 
   g_ledstate = 0x000000fe;
   LEDS       = g_ledstate;
+#endif
 }
 
 /************************************************************
diff --git a/arch/dm320/src/dm320.h b/arch/dm320/src/dm320.h
index 7bfb845c6f..6f0f89e165 100644
--- a/arch/dm320/src/dm320.h
+++ b/arch/dm320/src/dm320.h
@@ -40,12 +40,19 @@
  * Included Files
  ************************************************************************************/
 
+#include <nuttx/config.h>
 #ifndef __ASSEMBLY__
 # include <sys/types.h>
 #endif
 
 #include "arm9.h"
-#include "ntosd.h"
+
+#if defined(CONFIG_BOARD_NTOSD_DM320)
+# include <arch/board/ntosd.h>
+#else
+# warning "Unknown DM320 board"
+#endif
+
 #include "dm320-memorymap.h"
 #include "dm320-uart.h"
 #include "dm320-timer.h"
diff --git a/arch/dm320/src/ntosd.h b/arch/dm320/src/ntosd.h
deleted file mode 100644
index 271e047260..0000000000
--- a/arch/dm320/src/ntosd.h
+++ /dev/null
@@ -1,104 +0,0 @@
-/************************************************************************************
- * ntosd.h
- *
- *   Copyright (C) 2007 Gregory Nutt. All rights reserved.
- *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in
- *    the documentation and/or other materials provided with the
- *    distribution.
- * 3. Neither the name Gregory Nutt nor the names of its contributors may be
- *    used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- ************************************************************************************/
-
-#ifndef __NTOSD_H
-#define __NTOSD_H
-
-/************************************************************************************
- * Included Files
- ************************************************************************************/
-
-#ifndef __ASSEMBLY__
-# include <sys/types.h>
-#endif
-
-/************************************************************************************
- * Definitions
- ************************************************************************************/
-
-/* This platform has the ARM at 175 MHz and the DSP at 101.25 MHz */
-
-#define DM320_ARM_CLOCK  175500000
-#define DM320_SDR_CLOCK  101250000
-#define DM320_DSP_CLOCK  101250000
-#define DM320_AXL_CLOCK  175500000
-#define DM320_AHB_CLOCK   87750000
-
-/*
- * configration for dm9000 network device
- */
-#define DM9000_BASE      CONFIG_DM9000_BASE
-
-/* GIO keyboard (GIO 1-5) */
-
-#define KEY_MASK         0x003E
-#define KEY_SCAN0_BIT    0x0002
-#define KEY_SCAN1_BIT    0x0004
-#define KEY_SCAN2_BIT    0x0008
-#define KEY_SCAN3_BIT    0x0010
-#define KEY_SCAN4_BIT    0x0020
-
-#define KEY_GIO_DIR0_VAL KEY_MASK     /* Configure as INPUT */
-#define KEY_GIO_INV0_VAL KEY_MASK     /* All inverted */
-#define KEY_GIO_SET0_VAL (0)          /* Initialized to zero */
-#define KEY_GIO_CLR0_VAL (0)
-
-#define GIO_KEY_SCAN0    1
-#define GIO_KEY_SCAN1    2
-#define GIO_KEY_SCAN2    3
-#define GIO_KEY_SCAN3    4
-#define GIO_KEY_SCAN4    5
-#define GIO_MS_DETECT    5
-#define GIO_MMC_DETECT   8
-#define GIO_CFC_DETECT   9
-#define GIO_VIDEO_IN     10
-#define GIO_LED_RED      16
-#define GIO_LED_GREEN    17
-#define GIO_CFC_ENABLE   25
-#define GIO_I2C_SCL      30
-#define GIO_I2C_SDA      31
-#define GIO_ENA_VIDEO    32
-#define GIO_CFC_RESET    36
-#define GIO_CFC_STSCHG   37
-
-/************************************************************************************
- * Inline Functions
- ************************************************************************************/
-
-#ifndef __ASSEMBLY__
-
-#endif
-
-#endif  /* __NTOSD_H */
diff --git a/arch/pjrc-8051/src/pjrc.h b/arch/pjrc-8051/src/pjrc.h
deleted file mode 100644
index 0934c78bea..0000000000
--- a/arch/pjrc-8051/src/pjrc.h
+++ /dev/null
@@ -1,215 +0,0 @@
-/**************************************************************************
- * pjrc.h
- *
- *   Copyright (C) 2007 Gregory Nutt. All rights reserved.
- *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in
- *    the documentation and/or other materials provided with the
- *    distribution.
- * 3. Neither the name Gregory Nutt nor the names of its contributors may be
- *    used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- **************************************************************************/
-
-#ifndef __PJRC_H
-#define __PJRC_H
-
-/**************************************************************************
- * Included Files
- **************************************************************************/
-
-#include <sys/types.h>
-
-/**************************************************************************
- * Public Definitions
- **************************************************************************/
-
-/**************************************************************************
- * Public Types
- **************************************************************************/
-
-/**************************************************************************
- * Public Variables
- **************************************************************************/
-
-/* Memory Map
- *
- * BEGIN  END     DESCRIPTION
- * 0x0000 0x1fff  CODE:   ROM containg PAULMON2
- *                DATA:   RAM for program variables
- * 0x2000 0x7fff  COMMON: RAM for program code or
- *                        variables
- * 0x8000 0xf7ff  COMMON: FLASH for program code
- * 0xf800 0xfeff  COMMON: Peripherals
- * 0xff00 0xffff  COMMON: unused
- *
- * Program code may be loaded at the RAM location 0x2000-0x7fff
- * for testing.  If loaded into the FLASH location at
- * 0x8000-0xf7ff, PAULMON2 will automatically write the program
- * into flash.  The program is configured in the RAM-based test
- * configuration:
- */
-
-#define RAM_BLOCK_START  IRAM_SIZE
-#define RAM_BLOCK_END    0x1fff
-
-#define PROGRAM_BASE     0x2000
-#define PROGRAM_END      0x7fff
-
-#define FLASH_BASE       0x8000
-#define FLASH_END        0xf7ff
-
-/* Well-known entry points to access PAULMON2's built-in functions */
-
-#define PM2_ENTRY_PHEX1   0x002e
-#define PM2_ENTRY_COUT    0x0030
-#define PM2_ENTRY_CIN     0x0032
-#define PM2_ENTRY_PHEX    0x0034
-#define PM2_ENTRY_PHEX16  0x0036
-#define PM2_ENTRY_PSTR    0x0038
-#define PM2_ENTRY_ESC     0x003e
-#define PM2_ENTRY_UPPER   0x0040
-#define PM2_ENTRY_PINT8U  0x004D
-#define PM2_ENTRY_PINT8   0x0050
-#define PM2_ENTRY_PINT16U 0x0053
-#define PM2_ENTRY_NEWLINE 0x0048
-#define PM2_ENTRY_PRGM    0x0059
-#define PM2_ENTRY_ERBLOCK 0x0067
-
-/* PAULMON2 captures all interrupt vectors in ROM but relays them
- * through the following RAM addresses:
- */
-
-#define PM2_VECTOR_BASE    PROGRAM_BASE
-#define PM2_VECTOR_EXTINT0 (PM2_VECTOR_BASE + 3)
-#define PM2_VECTOR_TIMER0  (PM2_VECTOR_BASE + 11)
-#define PM2_VECTOR_EXTINT1 (PM2_VECTOR_BASE + 19)
-#define PM2_VECTOR_TIMER1  (PM2_VECTOR_BASE + 27)
-#define PM2_VECTOR_UART    (PM2_VECTOR_BASE + 35)
-#define PM2_VECTOR_TIMER2  (PM2_VECTOR_BASE + 43)
-
-/* Peripheral Mapping
- *
- * Begin End   Peripheral      Addr Acc Function
- * F800  F8FF  82C55 (A, B, C) F800 R/W Port A
- *                             F801 R/W Port B
- *                             F802 R/W Port C
- *                             F803 W   Config A,B,C
- * F900  F9FF  82C55 (D, E, F) F900 R/W Port D
- *                             F901 R/W Port E (LEDs)
- *                             F902 R/W Port F
- *                             F903 W   Config D,E,F
- * FA00  FAFF  User Expansion
- * FB00  FBFF  User Expansion
- * FC00  FCFF  User Expansion
- * FD00  FDFF  User Expansion
- * FE00  FEFF  LCD Port        FE00 W   Command Register
- *                             FE01 R   Status Register
- *                             FE02 W   Display or CGRAM Buffer
- *                             FE03 R   "     " "" "   " "    "
- *
- * These are the memory-mapped locations used to access  the two 82C55
- * chips
- */
-
-#ifndef __ASSEMBLY__
-xdata at 0xF800 ubyte p82c55_port_a;
-xdata at 0xF801 ubyte p82c55_port_b;
-xdata at 0xF802 ubyte p82c55_port_c;
-xdata at 0xF803 ubyte p82c55_abc_config;
-xdata at 0xF900 ubyte p82c55_port_d;
-xdata at 0xF901 ubyte p82c55_port_e;
-xdata at 0xF902 ubyte p82c55_port_f;
-xdata at 0xF903 ubyte p82c55_def_config;
-#endif
-
-/* LED (Port E) bit definitions */
-
-#define LED_STARTED                 0
-#define LED_HEAPALLOCATE            1
-#define LED_IRQSENABLED             2
-#define LED_IDLE                    3
-#define LED_UNUSED2                 4
-#define LED_INIRQ                   5
-#define LED_ASSERTION               6
-#define LED_PANIC                   7
-
-/* Registers.  8052 regiser definitions are provided in the SDCC header
- * file 8052.h.  However, a few SFR registers are missing from that
- * file (they can be found in mcs51reg.h, but that file is too much
- * when the following simple addtions do the job).
- */
-
-#ifndef __ASSEMBLY__
-sfr at 0xc9 T2MOD ;
-#endif
-
-/* Timing information.
- *
- * The PJRC board is based on a standard 87C52 CPU clocked at 22.1184 MHz.
- * The CPU clock is divided by 12 to yield a clock frequency of 1.8432 MHz.
- */
-
-#define CPU_CLOCK_HZ      22118400L
-#define TIMER_CLOCK_HZ     1843200L
-
-/* The 87C52 has three timers, timer 0, timer 1, and timer 2.  On the PJRC
- * board, timer 1 and 2 have dedicated functions.  They provide baud support
- * support for the boards two serial ports.  Unfortunately, only timer 2
- * can generate the accurate 100Hz timer desired by the OS.
- *
- * Timer 0 provides only a 8-bit auto-reload mode.
- */
-
-#ifdef CONFIG_8052_TIMER2
-
-/* To use timer 2 as the 100Hz system timer, we need to calculate a 16-bit
- * reload value that results in 100Hz overflow interrupts.  That value
- * is given by:
- *
- * Timer ticks   = TIMER_CLOCK_HZ / (desired ticks-per-second)
- *               = 18432
- * Capture value = 0xffff - (Timer ticks)
- *               = 47103 = 0x67ff
- */
-
-# define TIMER2_CAPTURE_LOW  0xff
-# define TIMER2_CAPTURE_HIGH 0x67
-
-#else
-
-/* Timer 0, mode 0 can be used as a system timer.  In that mode, the
- * 1.8432 is further divided by 32.  A single 8-bit value is incremented
- * at 57600 Hz, which results in 225 Timer 0 overflow interrupts per
- * second.
- */
-
-#endif
-
-/**************************************************************************
- * Public Function Prototypes
- **************************************************************************/
-
-#endif /* __PJRC_H */
diff --git a/arch/pjrc-8051/src/up_internal.h b/arch/pjrc-8051/src/up_internal.h
index 80900ca568..760a0ff290 100644
--- a/arch/pjrc-8051/src/up_internal.h
+++ b/arch/pjrc-8051/src/up_internal.h
@@ -42,8 +42,11 @@
 
 #include <nuttx/config.h>
 #include <arch/irq.h>
-#ifdef CONFIG_ARCH_PJRC
-# include "pjrc.h"
+
+#if defined(CONFIG_BOARD_PJRC_87C52)
+# include <arch/board/pjrc.h>
+#else
+# warning "805x board not recognized"
 #endif
 
 /**************************************************************************
diff --git a/configs/README.txt b/configs/README.txt
index a2faea333a..5962c34a4a 100644
--- a/configs/README.txt
+++ b/configs/README.txt
@@ -24,6 +24,7 @@ following characteristics:
 
 
 	<board-name>
+	|-- include/
 	|-- Make.defs
 	|-- defconfig
 	`-- setenv.sh
@@ -31,6 +32,12 @@ following characteristics:
 Summary of Files
 ^^^^^^^^^^^^^^^^
 
+include/ -- This directoy contains board specific header files.  This
+  directory will be linked as include/arch/board at configuration time and
+  can be included via '#include <arch/board/header.h>'.  These header file
+  can only be included by files in arch/<arch-name>include/ and
+  arch/<arch-name>/src
+
 Make.defs -- This makefile fragment provides architecture and
   tool-specific build options.  It will be included by all other
   makefiles in the build (once it is installed).  This make fragment
diff --git a/configs/c5471evm/Make.defs b/configs/c5471evm/Make.defs
index 11c36ba5f8..f0ef5c8458 100644
--- a/configs/c5471evm/Make.defs
+++ b/configs/c5471evm/Make.defs
@@ -47,7 +47,7 @@ ARCHPICFLAGS		= -fpic
 ARCHWARNINGS		= -Wall -Wstrict-prototypes -Wshadow
 ARCHDEFINES		=
 ARCHINCLUDES		= -I. -isystem $(TOPDIR)/include
-ARCHSCRIPT		= -T$(TOPDIR)/configs/c5471evm/ld.script
+ARCHSCRIPT		= -T$(TOPDIR)/configs/$(CONFIG_BOARD)/ld.script
 
 CROSSDEV		= arm-elf-
 CC			= $(CROSSDEV)gcc
diff --git a/configs/c5471evm/defconfig b/configs/c5471evm/defconfig
index a7d27caad8..a65cdb4358 100644
--- a/configs/c5471evm/defconfig
+++ b/configs/c5471evm/defconfig
@@ -37,6 +37,8 @@
 #
 # CONFIG_ARCH - identifies the arch subdirectory
 # CONFIG_ARCH_name - for use in C code
+# CONFIG_BOARD - identifies the configs subdirectory
+# CONFIG_BARD_name - for use in C code
 # CONFIG_ROM_VECTORS - unique to c5471
 # CONFIG_DRAM_END - the size of installed DRAM.
 #   Unique to c5471
@@ -45,6 +47,8 @@
 #
 CONFIG_ARCH=c5471
 CONFIG_ARCH_C5471=y
+CONFIG_BOARD=c5471evm
+CONFIG_BOARD_C5471EVM=y
 CONFIG_ROM_VECTORS=n
 CONFIG_DRAM_END=0x11000000
 CONFIG_C5471_LEDS=y
diff --git a/configs/m68332evb/Make.defs b/configs/m68332evb/Make.defs
index 1b7b65e501..2dc2d5b2bc 100644
--- a/configs/m68332evb/Make.defs
+++ b/configs/m68332evb/Make.defs
@@ -47,7 +47,7 @@ ARCHPICFLAGS		= -pic
 ARCHWARNINGS		= -Wall -Wstrict-prototypes -Wshadow
 ARCHDEFINES		=
 ARCHINCLUDES		= -I. -isystem $(TOPDIR)/include
-ARCHSCRIPT		= -T$(TOPDIR)/configs/m68332evb/ld.script
+ARCHSCRIPT		= -T$(TOPDIR)/configs/$(CONFIG_BOARD)/ld.script
 
 CROSSDEV		= m68k-elf-
 CC			= $(CROSSDEV)gcc
diff --git a/configs/m68332evb/defconfig b/configs/m68332evb/defconfig
index 537d56281e..86a7e059a5 100644
--- a/configs/m68332evb/defconfig
+++ b/configs/m68332evb/defconfig
@@ -37,12 +37,16 @@
 #
 # CONFIG_ARCH - identifies the arch subdirectory
 # CONFIG_ARCH_name - for use in C code
+# CONFIG_BOARD - identifies the configs subdirectory
+# CONFIG_BARD_name - for use in C code
 # CONFIG_DRAM_SIZE - Describes the installed DRAM.
 # CONFIG_ARCH_STACKDUMP - Do stack dumps after assertions
 #
 CONFIG_ARCH=m68332evb
 CONFIG_ARCH_M68332=y
 CONFIG_ARCH_M68332EVB=y
+CONFIG_BOARD=m68332evb
+CONFIG_BOARD_M68332EVB=y
 CONFIG_DRAM_SIZE=0x003000
 CONFIG_DRAM_NUTTXENTRY=0x003000
 CONFIG_ARCH_STACKDUMP=y
diff --git a/configs/ntosd-dm320/Make.defs b/configs/ntosd-dm320/Make.defs
index 363c836698..f0ef5c8458 100644
--- a/configs/ntosd-dm320/Make.defs
+++ b/configs/ntosd-dm320/Make.defs
@@ -47,7 +47,7 @@ ARCHPICFLAGS		= -fpic
 ARCHWARNINGS		= -Wall -Wstrict-prototypes -Wshadow
 ARCHDEFINES		=
 ARCHINCLUDES		= -I. -isystem $(TOPDIR)/include
-ARCHSCRIPT		= -T$(TOPDIR)/configs/ntosd-dm320/ld.script
+ARCHSCRIPT		= -T$(TOPDIR)/configs/$(CONFIG_BOARD)/ld.script
 
 CROSSDEV		= arm-elf-
 CC			= $(CROSSDEV)gcc
diff --git a/configs/ntosd-dm320/defconfig b/configs/ntosd-dm320/defconfig
index 4a7ea5c793..1763fe0f4c 100644
--- a/configs/ntosd-dm320/defconfig
+++ b/configs/ntosd-dm320/defconfig
@@ -37,12 +37,16 @@
 #
 # CONFIG_ARCH - identifies the arch subdirectory
 # CONFIG_ARCH_name - for use in C code
+# CONFIG_BOARD - identifies the configs subdirectory
+# CONFIG_BARD_name - for use in C code
 # CONFIG_ROM_VECTORS - unique to dm320
 # CONFIG_DRAM_SIZE - Describes the installed DRAM.
 # CONFIG_ARCH_STACKDUMP - Do stack dumps after assertions
 #
 CONFIG_ARCH=dm320
 CONFIG_ARCH_DM320=y
+CONFIG_BOARD=ntosd-dm320
+CONFIG_BOARD_NTOSD_DM320=y
 CONFIG_ROM_VECTORS=n
 CONFIG_DRAM_SIZE=0x01000000
 CONFIG_DRAM_NUTTXENTRY=0x01008000
diff --git a/configs/pjrc-8051/defconfig b/configs/pjrc-8051/defconfig
index cdb73acdab..316bda2b4b 100644
--- a/configs/pjrc-8051/defconfig
+++ b/configs/pjrc-8051/defconfig
@@ -38,10 +38,14 @@
 # CONFIG_ARCH - identifies the arch subdirectory
 # CONFIG_ARCH_8051 - Set if processor is 8051 family
 # CONFIG_ARCH_8052 = Set if processor is 8052 family
+# CONFIG_BOARD - identifies the configs subdirectory
+# CONFIG_BARD_name - for use in C code
 #
 CONFIG_ARCH=pjrc-8051
 CONFIG_ARCH_8051=n
 CONFIG_ARCH_8052=y
+CONFIG_BOARD=pjrc-8051
+CONFIG_BOARD_PJRC_87C52=y
 
 #
 # Architecture-specific settings.  These may mean nothing to
diff --git a/configs/sim/defconfig b/configs/sim/defconfig
index 142d1d4136..13e1030eea 100644
--- a/configs/sim/defconfig
+++ b/configs/sim/defconfig
@@ -37,9 +37,13 @@
 #
 # CONFIG_ARCH - identifies the arch subdirectory
 # CONFIG_ARCH_name - for use in C code
+# CONFIG_BOARD - identifies the configs subdirectory
+# CONFIG_BARD_name - for use in C code
 #
 CONFIG_ARCH=sim
 CONFIG_ARCH_SIM=y
+CONFIG_BOARD=sim
+CONFIG_BOARD_SIM=y
 
 #
 # General OS setup
diff --git a/examples/ostest/posixtimer.c b/examples/ostest/posixtimer.c
index b7d63644e6..1b466c99fb 100644
--- a/examples/ostest/posixtimer.c
+++ b/examples/ostest/posixtimer.c
@@ -121,7 +121,6 @@ static void timer_expiration(int signo, siginfo_t *info, void *ucontext)
 
 void timer_test(void)
 {
-  struct sched_param param;
   sigset_t           sigset;
   struct sigaction   act;
   struct sigaction   oact;
diff --git a/lib/lib_sem.c b/lib/lib_sem.c
index 9c105dfca7..604313d3d5 100644
--- a/lib/lib_sem.c
+++ b/lib/lib_sem.c
@@ -104,9 +104,9 @@ void lib_take_semaphore(FILE *stream)
 	  ASSERT(*get_errno_ptr() == EINTR);
 	}
 
-      /* We have it.  Claim the stak and return */
+      /* We have it.  Stake the claim and return */
 
-      stream->holder      = my_pid;
+      stream->holder = my_pid;
       stream->counts = 1;
     }
 }
@@ -119,7 +119,7 @@ void lib_give_semaphore(FILE *stream)
 {
   pid_t my_pid = getpid();
 
-  /* I better be holding at least one reference to the semaphore */
+  /* I better be holding at least one count on the semaphore */
 
   ASSERT(stream->holder == my_pid);