diff --git a/ChangeLog b/ChangeLog
index 5cc86cc55114eed08fd67456adb22c34013f1070..fcfc8ff698a08bc1937ded77a36b13f08508b6b0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1519,4 +1519,10 @@
advantage that it runs in the actual NuttX tasking environment (the
mm/mm_test.c only runs in a PC simulation environment).
* drivers/mmcsd_sdio.c/h -- Several corrections submitted by Uros Platise.
+ * arch/x86 - Provide support for x86 architectures. Support for the i486
+ architecture under QEMU is provided under arch/x86/include/i486,
+ arch/x86/include/qemu, arch/x86/src/i486, and arch/x86/src/qemu.
+ * configs/qemu-i486 - "Board" support configurations for verifying the QEME
+ i486 port.
+
diff --git a/Documentation/NuttX.html b/Documentation/NuttX.html
index 3e46d58e8dd5709d3e9d3002e816da02dfb01bdc..4cdadd2761d15fbb3986dbd3b4d469d38688295c 100644
--- a/Documentation/NuttX.html
+++ b/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 2, 2011</p>
+ <p>Last Updated: March 5, 2011</p>
</td>
</tr>
</table>
@@ -2115,12 +2115,17 @@ nuttx-5.19 2011-xx-xx Gregory Nutt <spudmonkey@racsa.co.cr>
occurs.
* configs/olimex-lpc1766stk -- Added an LED encoded to indicate if the LPC1766
is in sleeping.
- * examples/mm -- This is a simplified version of the "built-in" memory manager
- test of mm/mm_test.c. It is simplified because it does not have access to
- the internals of the memory manager as does mm/mm_test.c, but it has the
- advantage that it runs in the actual NuttX tasking environment (the
- mm/mm_test.c only runs in a PC simulation environment).
+ * examples/mm -- This is a simplified version of the "built-in" memory manager
+ test of mm/mm_test.c. It is simplified because it does not have access to
+ the internals of the memory manager as does mm/mm_test.c, but it has the
+ advantage that it runs in the actual NuttX tasking environment (the
+ mm/mm_test.c only runs in a PC simulation environment).
* drivers/mmcsd_sdio.c/h -- Several corrections submitted by Uros Platise.
+ * arch/x86 - Provide support for x86 architectures. Support for the i486
+ architecture under QEMU is provided under arch/x86/include/i486,
+ arch/x86/include/qemu, arch/x86/src/i486, and arch/x86/src/qemu.
+ * configs/qemu-i486 - "Board" support configurations for verifying the QEME
+ i486 port.
pascal-2.1 2011-xx-xx Gregory Nutt <spudmonkey@racsa.co.cr>
diff --git a/Documentation/README.html b/Documentation/README.html
index 0338330fae5cd14342ca453deccf07facb2556dc..c9238cc8d12b04f0615c2d0f9a2bdcdc6c177ec6 100755
--- a/Documentation/README.html
+++ b/Documentation/README.html
@@ -9,7 +9,7 @@
<tr align="center" bgcolor="#e4e4e4">
<td>
<h1><big><font color="#3c34ec"><i>NuttX README Files</i></font></big></h1>
- <p>Last Updated: February 27, 2010</p>
+ <p>Last Updated: March 5, 2010</p>
</td>
</tr>
</table>
@@ -38,6 +38,11 @@
| | | |-<a href="arch/sh/src/m16c/README.txt?view=log">m16c/README.txt</a>
| | | |-<a href="arch/sh/src/sh1/README.txt?view=log">sh1/README.txt</a>
| | | `-<a href="arch/sh/src/README.txt?view=log">README.txt</a>
+ | |- x86/
+ | | |- include/
+ | | | `-<a href="arch/x86/include/README.txt?view=log">README.txt</a>
+ | | `- src/
+ | | `-<a href="arch/x86/src/README.txt?view=log">README.txt</a>
| `- z80/
| | `- src/
| | `- <a href="arch/z80/src/z80/README.txt?view=log">z80/README.txt</a>
@@ -111,6 +116,10 @@
| | |- <a href="configs/pjrc-8051/include/README.txt?view=log">include/README.txt</a>
| | |- <a href="configs/pjrc-8051/src/README.txt?view=log">src/README.txt</a>
| | `- <a href="configs/pjrc-8051/README.txt?view=log"><b><i>README.txt</i></b></a>
+ | |- qemu-i486/
+ | | |- <a href="configs/qemu-i486/include/README.txt?view=log">include/README.txt</a>
+ | | |- <a href="configs/qemu-i486/src/README.txt?view=log">src/README.txt</a>
+ | | `- <a href="configs/qemu-i486/README.txt?view=log"><b><i>README.txt</i></b></a>
| |- sam3u-ek/
| | `- <a href="configs/sam3u-ek/README.txt?view=log"><b><i>README.txt</i></b></a>
| |- sim/
diff --git a/README.txt b/README.txt
index 4ae870ee6f4c9957acd0b75f032ccef2b858ecca..af6af5fa130d8893e102e4528fdc0d01399f1c41 100755
--- a/README.txt
+++ b/README.txt
@@ -251,6 +251,11 @@ Below is a guide to the available README files in the NuttX source tree:
| | | |-m16c/README.txt
| | | |-sh1/README.txt
| | | `-README.txt
+ | |- x86/
+ | | |- include/
+ | | | `-README.txt
+ | | `- src/
+ | | `-README.txt
| `- z80/
| | `- src/
| | `- z80/README.txt
@@ -324,6 +329,10 @@ Below is a guide to the available README files in the NuttX source tree:
| | |- include/README.txt
| | |- src/README.txt
| | `- README.txt
+ | |- qemu-i486/
+ | | |- include/README.txt
+ | | |- src/README.txt
+ | | `- README.txt
| |- sam3u-ek/
| | `- README.txt
| |- sim/
diff --git a/arch/x86/src/qemu/Make.defs b/arch/x86/src/qemu/Make.defs
index e44028699e4cd4ac2f3326f907e316e776cd662e..6bcf102f924bb07e1fa96cde7c55dae4a35e129f 100755
--- a/arch/x86/src/qemu/Make.defs
+++ b/arch/x86/src/qemu/Make.defs
@@ -52,6 +52,6 @@ CMN_CSRCS = up_allocateheap.c up_assert.c up_blocktask.c up_copystate.c \
CHIP_ASRCS = qemu_saveusercontext.S qemu_fullcontextrestore.S qemu_vectors.S
CHIP_CSRCS = qemu_handlers.c qemu_idle.c qemu_irq.c qemu_lowputc.c \
- qemu_lowsetup.c qemu_timerisr.c
+ qemu_lowsetup.c qemu_serial.c qemu_timerisr.c
# Configuration-dependent QEMU files
diff --git a/arch/x86/src/qemu/qemu_serial.c b/arch/x86/src/qemu/qemu_serial.c
new file mode 100644
index 0000000000000000000000000000000000000000..743ccb691572b366503d65c0902508ccfdde6f17
--- /dev/null
+++ b/arch/x86/src/qemu/qemu_serial.c
@@ -0,0 +1,89 @@
+/****************************************************************************
+ * arch/x86/src/qemu/qemu_serial.c
+ *
+ * Copyright (C) 2011 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 NuttX 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.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <nuttx/arch.h>
+#include "up_internal.h"
+
+#ifdef CONFIG_USE_SERIALDRIVER
+#error "Serial driver support not initialized"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+#else /* CONFIG_USE_SERIALDRIVER */
+
+/****************************************************************************
+ * Name: up_putc
+ *
+ * Description:
+ * Provide priority, low-level access to support OS debug writes
+ *
+ ****************************************************************************/
+
+int up_putc(int ch)
+{
+ /* Check for LF */
+
+ if (ch == '\n')
+ {
+ /* Add CR */
+
+ up_lowputc('\r');
+ }
+
+ up_lowputc(ch);
+ return ch;
+}
+
+#endif /* CONFIG_USE_SERIALDRIVER */
diff --git a/configs/qemu-i486/ostest/defconfig b/configs/qemu-i486/ostest/defconfig
index f352930f51f8cbcda1fc4a156060c656be3fa0ca..44cb27a03b2efe2d6d41afe19eebc65cec819a9a 100644
--- a/configs/qemu-i486/ostest/defconfig
+++ b/configs/qemu-i486/ostest/defconfig
@@ -86,67 +86,61 @@ CONFIG_ARCH_DMA=n
#
# General OS setup
#
-# CONFIG_APP_DIR - Identifies the relative path to the directory
-# that builds the application to link with NuttX.
+# CONFIG_APP_DIR - Identifies the relative path to the directory that builds
+# the application to link with NuttX.
# CONFIG_DEBUG - enables built-in debug options
# CONFIG_DEBUG_VERBOSE - enables verbose debug output
-# CONFIG_DEBUG_SYMBOLS - build without optimization and with
-# debug symbols (needed for use with a debugger).
-# CONFIG_MM_REGIONS - If the architecture includes multiple
-# regions of memory to allocate from, this specifies the
-# number of memory regions that the memory manager must
-# handle and enables the API mm_addregion(start, end);
-# CONFIG_ARCH_LOWPUTC - architecture supports low-level, boot
-# time console output
-# CONFIG_TICKS_PER_MSEC - The default system timer is 100Hz
-# or TICKS_PER_MSEC=10. This setting may be defined to
-# inform NuttX that the processor hardware is providing
-# system timer interrupts at some interrupt interval other
-# than 10 msec.
-# CONFIG_RR_INTERVAL - The round robin timeslice will be set
-# this number of milliseconds; Round robin scheduling can
-# be disabled by setting this value to zero.
-# CONFIG_SCHED_INSTRUMENTATION - enables instrumentation in
-# scheduler to monitor system performance
-# CONFIG_TASK_NAME_SIZE - Spcifies that maximum size of a
-# task name to save in the TCB. Useful if scheduler
-# instrumentation is selected. Set to zero to disable.
+# CONFIG_DEBUG_SYMBOLS - build without optimization and with debug symbols
+# (needed for use with a debugger).
+# CONFIG_MM_REGIONS - If the architecture includes multiple regions of memory
+# to allocate from, this specifies the number of memory regions that the
+# memory manager must handle and enables the API mm_addregion(start, end);
+# CONFIG_ARCH_LOWPUTC - architecture supports low-level, boot time console
+# output.
+# CONFIG_TICKS_PER_MSEC - The default system timer is 100Hz or TICKS_PER_MSEC=10.
+# This setting may be defined to inform NuttX that the processor hardware is
+# providing system timer interrupts at some interrupt interval other than 10
+# msec.
+# CONFIG_RR_INTERVAL - The round robin timeslice will be set this number of
+# milliseconds; Round robin scheduling can be disabled by setting this
+# value to zero.
+# CONFIG_SCHED_INSTRUMENTATION - enables instrumentation in scheduler to
+# monitor system performance
+# CONFIG_TASK_NAME_SIZE - Spcifies that maximum size of a task name to save in
+# the TCB. Useful if scheduler instrumentation is selected. Set to zero to
+# disable.
# CONFIG_JULIAN_TIME - Enables Julian time conversions
-# CONFIG_START_YEAR, CONFIG_START_MONTH, CONFIG_START_DAY -
-# Used to initialize the internal time logic.
-# CONFIG_DEV_CONSOLE - Set if architecture-specific logic
-# provides /dev/console. Enables stdout, stderr, stdin.
-# CONFIG_DEV_LOWCONSOLE - Use the simple, low-level serial console
-# driver (minimul support)
-# CONFIG_MUTEX_TYPES: Set to enable support for recursive and
-# errorcheck mutexes. Enables pthread_mutexattr_settype().
-# CONFIG_PRIORITY_INHERITANCE : Set to enable support for priority
-# inheritance on mutexes and semaphores.
-# CONFIG_SEM_PREALLOCHOLDERS: This setting is only used if priority
-# inheritance is enabled. It defines the maximum number of
-# different threads (minus one) that can take counts on a
-# semaphore with priority inheritance support. This may be
-# set to zero if priority inheritance is disabled OR if you
-# are only using semaphores as mutexes (only one holder) OR
-# if no more than two threads participate using a counting
+# CONFIG_START_YEAR, CONFIG_START_MONTH, CONFIG_START_DAY - Used to initialize
+# the internal time logic.
+# CONFIG_DEV_CONSOLE - Set if architecture-specific logic provides /dev/console.
+# Enables stdout, stderr, stdin.
+# CONFIG_DEV_LOWCONSOLE - Use the simple, low-level serial console driver
+# (minimal support)
+# CONFIG_MUTEX_TYPES: Set to enable support for recursive and errorcheck
+# mutexes. Enables pthread_mutexattr_settype().
+# CONFIG_PRIORITY_INHERITANCE : Set to enable support for priority inheritance
+# on mutexes and semaphores.
+# CONFIG_SEM_PREALLOCHOLDERS: This setting is only used if priority inheritance
+# is enabled. It defines the maximum number of different threads (minus one)
+# that can take counts on a semaphore with priority inheritance support.
+# This may be set to zero if priority inheritance is disabled OR if you are
+# only using semaphores as mutexes (only one holder) OR if no more than two
+# threads participate using a counting semaphore.
+# CONFIG_SEM_NNESTPRIO. If priority inheritance is enabled, then this setting
+# is the maximum number of higher priority threads (minus 1) than can be
+# waiting for another thread to release a count on a semaphore. This value
+# may be set to zero if no more than one thread is expected to wait for a
# semaphore.
-# CONFIG_SEM_NNESTPRIO. If priority inheritance is enabled,
-# then this setting is the maximum number of higher priority
-# threads (minus 1) than can be waiting for another thread
-# to release a count on a semaphore. This value may be set
-# to zero if no more than one thread is expected to wait for
-# a semaphore.
-# CONFIG_FDCLONE_DISABLE. Disable cloning of all file descriptors
-# by task_create() when a new task is started. If set, all
-# files/drivers will appear to be closed in the new task.
-# CONFIG_FDCLONE_STDIO. Disable cloning of all but the first
-# three file descriptors (stdin, stdout, stderr) by task_create()
-# when a new task is started. If set, all files/drivers will
-# appear to be closed in the new task except for stdin, stdout,
-# and stderr.
-# CONFIG_SDCLONE_DISABLE. Disable cloning of all socket
-# desciptors by task_create() when a new task is started. If
-# set, all sockets will appear to be closed in the new task.
+# CONFIG_FDCLONE_DISABLE. Disable cloning of all file descriptors by task_create()
+# when a new task is started. If set, all files/drivers will appear to be
+# closed in the new task.
+# CONFIG_FDCLONE_STDIO. Disable cloning of all but the first three file
+# descriptors (stdin, stdout, stderr) by task_create() when a new task is
+# started. If set, all files/drivers will appear to be closed in the new
+# task except for stdin, stdout, and stderr.
+# CONFIG_SDCLONE_DISABLE. Disable cloning of all socket desciptors by
+# task_create() when a new task is started. If set, all sockets will appear
+# to be closed in the new task.
#
CONFIG_APP_DIR=examples/ostest
CONFIG_DEBUG=y
@@ -162,7 +156,7 @@ CONFIG_START_MONTH=3
CONFIG_START_DAY=3
CONFIG_JULIAN_TIME=n
CONFIG_DEV_CONSOLE=y
-CONFIG_DEV_LOWCONSOLE=n
+CONFIG_DEV_LOWCONSOLE=y
CONFIG_MUTEX_TYPES=y
CONFIG_PRIORITY_INHERITANCE=n
CONFIG_SEM_PREALLOCHOLDERS=0
@@ -172,19 +166,15 @@ CONFIG_FDCLONE_STDIO=n
CONFIG_SDCLONE_DISABLE=y
#
-# The following can be used to disable categories of
-# APIs supported by the OS. If the compiler supports
-# weak functions, then it should not be necessary to
-# disable functions unless you want to restrict usage
-# of those APIs.
+# The following can be used to disable categories ofAPIs supported by the OS.
+# If the compiler supports weak functions, then it should not be necessary to
+# disable functions unless you want to restrict usage of those APIs.
#
-# There are certain dependency relationships in these
-# features.
+# There are certain dependency relationships in these features.
#
-# o mq_notify logic depends on signals to awaken tasks
-# waiting for queues to become full or empty.
-# o pthread_condtimedwait() depends on signals to wake
-# up waiting tasks.
+# o mq_notify logic depends on signals to awaken tasks waiting for queues to
+# become full or empty.
+# o pthread_condtimedwait() depends on signals to wake up waiting tasks.
#
CONFIG_DISABLE_CLOCK=n
CONFIG_DISABLE_POSIX_TIMERS=n
@@ -198,16 +188,16 @@ CONFIG_DISABLE_POLL=y
#
# Misc libc settings
#
-# CONFIG_NOPRINTF_FIELDWIDTH - sprintf-related logic is a
-# little smaller if we do not support fieldwidthes
+# CONFIG_NOPRINTF_FIELDWIDTH - sprintf-related logic is a little smaller if we
+# do not support fieldwidthes
#
CONFIG_NOPRINTF_FIELDWIDTH=n
#
# Allow for architecture optimized implementations
#
-# The architecture can provide optimized versions of the
-# following to improve sysem performance
+# The architecture can provide optimized versions of the following to improve
+# system performance
#
CONFIG_ARCH_MEMCPY=n
CONFIG_ARCH_MEMCMP=n
@@ -226,14 +216,14 @@ CONFIG_ARCH_KFREE=n
##
# General build options
#
-# CONFIG_RRLOAD_BINARY - make the rrload binary format used with
-# BSPs from www.ridgerun.com using the tools/mkimage.sh script
-# CONFIG_INTELHEX_BINARY - make the Intel HEX binary format
-# used with many different loaders using the GNU objcopy program
-# Should not be selected if you are not using the GNU toolchain.
-# CONFIG_RAW_BINARY - make a raw binary format file used with many
-# different loaders using the GNU objcopy program. This option
-# should not be selected if you are not using the GNU toolchain.
+# CONFIG_RRLOAD_BINARY - make the rrload binary format used with BSPs from
+# www.ridgerun.com using the tools/mkimage.sh script
+# CONFIG_INTELHEX_BINARY - make the Intel HEX binary format used with many
+# different loaders using the GNU objcopy program Should not be selected if
+# you are not using the GNU toolchain.
+# CONFIG_RAW_BINARY - make a raw binary format file used with many different
+# loaders using the GNU objcopy program. This option should not be selected
+# if you are not using the GNU toolchain.
# CONFIG_HAVE_LIBM - toolchain supports libm.a
#
CONFIG_RRLOAD_BINARY=n
@@ -244,37 +234,33 @@ CONFIG_HAVE_LIBM=y
#
# Sizes of configurable things (0 disables)
#
-# CONFIG_MAX_TASKS - The maximum number of simultaneously
-# active tasks. This value must be a power of two.
-# CONFIG_MAX_TASK_ARGS - This controls the maximum number of
-# of parameters that a task may receive (i.e., maxmum value
-# of 'argc')
-# CONFIG_NPTHREAD_KEYS - The number of items of thread-
-# specific data that can be retained
-# CONFIG_NFILE_DESCRIPTORS - The maximum number of file
-# descriptors (one for each open)
-# CONFIG_NFILE_STREAMS - The maximum number of streams that
-# can be fopen'ed
+# CONFIG_MAX_TASKS - The maximum number of simultaneously active tasks. This
+# value must be a power of two.
+# CONFIG_MAX_TASK_ARGS - This controls the maximum number of of parameters
+# that a task may receive (i.e., maxmum value of 'argc')
+# CONFIG_NPTHREAD_KEYS - The number of items of thread-specific data that can
+# be retained
+# CONFIG_NFILE_DESCRIPTORS - The maximum number of file descriptors (one for
+# each open)
+# CONFIG_NFILE_STREAMS - The maximum number of streams that can be fopen'ed
# CONFIG_NAME_MAX - The maximum size of a file name.
-# CONFIG_STDIO_BUFFER_SIZE - Size of the buffer to allocate
-# on fopen. (Only if CONFIG_NFILE_STREAMS > 0)
-# CONFIG_NUNGET_CHARS - Number of characters that can be
-# buffered by ungetc() (Only if CONFIG_NFILE_STREAMS > 0)
-# CONFIG_PREALLOC_MQ_MSGS - The number of pre-allocated message
-# structures. The system manages a pool of preallocated
-# message structures to minimize dynamic allocations
-# CONFIG_MQ_MAXMSGSIZE - Message structures are allocated with
-# a fixed payload size given by this settin (does not include
-# other message structure overhead.
-# CONFIG_MAX_WDOGPARMS - Maximum number of parameters that
-# can be passed to a watchdog handler
-# CONFIG_PREALLOC_WDOGS - The number of pre-allocated watchdog
-# structures. The system manages a pool of preallocated
-# watchdog structures to minimize dynamic allocations
-# CONFIG_PREALLOC_TIMERS - The number of pre-allocated POSIX
-# timer structures. The system manages a pool of preallocated
-# timer structures to minimize dynamic allocations. Set to
-# zero for all dynamic allocations.
+# CONFIG_STDIO_BUFFER_SIZE - Size of the buffer to allocate on fopen. (Only if
+# CONFIG_NFILE_STREAMS > 0)
+# CONFIG_NUNGET_CHARS - Number of characters that can be buffered by ungetc()
+# (Only if CONFIG_NFILE_STREAMS > 0)
+# CONFIG_PREALLOC_MQ_MSGS - The number of pre-allocated message structures.
+# The system manages a pool of preallocated message structures to minimize
+# dynamic allocations
+# CONFIG_MQ_MAXMSGSIZE - Message structures are allocated with a fixed payload
+# size given by this settin (does not include other message structure overhead.
+# CONFIG_MAX_WDOGPARMS - Maximum number of parameters that can be passed to a
+# watchdog handler
+# CONFIG_PREALLOC_WDOGS - The number of pre-allocated watchdog structures. The
+# system manages a pool of preallocated watchdog structures to minimize
+# dynamic allocations
+# CONFIG_PREALLOC_TIMERS - The number of pre-allocated POSIX timer structures.
+# The system manages a pool of preallocated timer structures to minimize
+# dynamic allocations. Set to zero for all dynamic allocations.
#
CONFIG_MAX_TASKS=64
CONFIG_MAX_TASK_ARGS=4