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https://github.com/FreeRTOS/FreeRTOS-Kernel.git
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989bc332b2
* Add XMOS XCore ports Some minor modifications are also made to the kernel to support the XCore compiler's automatic stack size calculation. * Update kernel to support SMP The XMOS XCore ports are also updated to support SMP. * Fix compiler warnings in xcore ports The port set and clear interrupt mask from ISR macros were removed from the ports so that the default macros found in FreeRTOS.h are used instead. The default macros do not result in warnings when they are used. * Remove inline function from timers.h Inline function converted to macro. This should now build when optimizations are off and inlining is disabled. * Fix compiler warnings in xcore ports and tasks.c * fixed documentation for ulTaskNotifyTake() and ulTaskNotifyTakeIndexed() * spelling fixes for tasks.c Co-authored-by: Michael Bruno <mikeb@xmos.com>
146 lines
6.6 KiB
C
146 lines
6.6 KiB
C
/*******************************************************************************
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* // Copyright (c) 2003-2015 Cadence Design Systems, Inc.
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* //
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* // Permission is hereby granted, free of charge, to any person obtaining
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* // a copy of this software and associated documentation files (the
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* // "Software"), to deal in the Software without restriction, including
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* // without limitation the rights to use, copy, modify, merge, publish,
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* // distribute, sublicense, and/or sell copies of the Software, and to
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* // permit persons to whom the Software is furnished to do so, subject to
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* // the following conditions:
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* //
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* // The above copyright notice and this permission notice shall be included
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* // in all copies or substantial portions of the Software.
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* //
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* // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* // IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* // CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* // TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* // SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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* --------------------------------------------------------------------------------
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*
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* Configuration-specific information for Xtensa build. This file must be
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* included in FreeRTOSConfig.h to properly set up the config-dependent
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* parameters correctly.
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*
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* NOTE: To enable thread-safe C library support, XT_USE_THREAD_SAFE_CLIB must
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* be defined to be > 0 somewhere above or on the command line.
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*
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*******************************************************************************/
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#ifndef XTENSA_CONFIG_H
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#define XTENSA_CONFIG_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <xtensa/hal.h>
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#include <xtensa/config/core.h>
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#include <xtensa/config/system.h> /* required for XSHAL_CLIB */
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#include "xtensa_context.h"
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/*-----------------------------------------------------------------------------
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* STACK REQUIREMENTS
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*
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* This section defines the minimum stack size, and the extra space required to
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* be allocated for saving coprocessor state and/or C library state information
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* (if thread safety is enabled for the C library). The sizes are in bytes.
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*
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* Stack sizes for individual tasks should be derived from these minima based on
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* the maximum call depth of the task and the maximum level of interrupt nesting.
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* A minimum stack size is defined by XT_STACK_MIN_SIZE. This minimum is based
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* on the requirement for a task that calls nothing else but can be interrupted.
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* This assumes that interrupt handlers do not call more than a few levels deep.
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* If this is not true, i.e. one or more interrupt handlers make deep calls then
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* the minimum must be increased.
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*
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* If the Xtensa processor configuration includes coprocessors, then space is
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* allocated to save the coprocessor state on the stack.
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*
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* If thread safety is enabled for the C runtime library, (XT_USE_THREAD_SAFE_CLIB
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* is defined) then space is allocated to save the C library context in the TCB.
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*
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* Allocating insufficient stack space is a common source of hard-to-find errors.
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* During development, it is best to enable the FreeRTOS stack checking features.
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*
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* Usage:
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*
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* XT_USE_THREAD_SAFE_CLIB -- Define this to a nonzero value to enable thread-safe
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* use of the C library. This will require extra stack
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* space to be allocated for tasks that use the C library
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* reentrant functions. See below for more information.
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*
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* NOTE: The Xtensa toolchain supports multiple C libraries and not all of them
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* support thread safety. Check your core configuration to see which C library
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* was chosen for your system.
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*
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* XT_STACK_MIN_SIZE -- The minimum stack size for any task. It is recommended
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* that you do not use a stack smaller than this for any
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* task. In case you want to use stacks smaller than this
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* size, you must verify that the smaller size(s) will work
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* under all operating conditions.
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*
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* XT_STACK_EXTRA -- The amount of extra stack space to allocate for a task
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* that does not make C library reentrant calls. Add this
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* to the amount of stack space required by the task itself.
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*
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* XT_STACK_EXTRA_CLIB -- The amount of space to allocate for C library state.
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*
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* -----------------------------------------------------------------------------*/
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/* Extra space required for interrupt/exception hooks. */
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#ifdef XT_INTEXC_HOOKS
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#ifdef __XTENSA_CALL0_ABI__
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#define STK_INTEXC_EXTRA 0x200
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#else
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#define STK_INTEXC_EXTRA 0x180
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#endif
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#else
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#define STK_INTEXC_EXTRA 0
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#endif
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#define XT_CLIB_CONTEXT_AREA_SIZE 0
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/*------------------------------------------------------------------------------
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* Extra size -- interrupt frame plus coprocessor save area plus hook space.
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* NOTE: Make sure XT_INTEXC_HOOKS is undefined unless you really need the hooks.
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* ------------------------------------------------------------------------------*/
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#ifdef __XTENSA_CALL0_ABI__
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#define XT_XTRA_SIZE ( XT_STK_FRMSZ + STK_INTEXC_EXTRA + 0x10 + XT_CP_SIZE )
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#else
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#define XT_XTRA_SIZE ( XT_STK_FRMSZ + STK_INTEXC_EXTRA + 0x20 + XT_CP_SIZE )
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#endif
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/*------------------------------------------------------------------------------
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* Space allocated for user code -- function calls and local variables.
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* NOTE: This number can be adjusted to suit your needs. You must verify that the
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* amount of space you reserve is adequate for the worst-case conditions in your
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* application.
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* NOTE: The windowed ABI requires more stack, since space has to be reserved
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* for spilling register windows.
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* ------------------------------------------------------------------------------*/
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#ifdef __XTENSA_CALL0_ABI__
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#define XT_USER_SIZE 0x200
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#else
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#define XT_USER_SIZE 0x400
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#endif
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/* Minimum recommended stack size. */
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#define XT_STACK_MIN_SIZE ( ( XT_XTRA_SIZE + XT_USER_SIZE ) / sizeof( unsigned char ) )
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/* OS overhead with and without C library thread context. */
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#define XT_STACK_EXTRA ( XT_XTRA_SIZE )
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#define XT_STACK_EXTRA_CLIB ( XT_XTRA_SIZE + XT_CLIB_CONTEXT_AREA_SIZE )
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#ifdef __cplusplus
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}
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#endif
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#endif /* XTENSA_CONFIG_H */
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