mirror of
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>
127 lines
3.3 KiB
C
127 lines
3.3 KiB
C
/*
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* FreeRTOS Kernel V10.4.3
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* Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* 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, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* https://www.FreeRTOS.org
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* https://github.com/FreeRTOS
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*
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* 1 tab == 4 spaces!
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*/
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/* Variables used by scheduler */
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.extern _pxCurrentTCB
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.extern _usCriticalNesting
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/*
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* portSAVE_CONTEXT MACRO
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* Saves the context of the general purpose registers, CS and ES (only in far
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* memory mode) registers the usCriticalNesting Value and the Stack Pointer
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* of the active Task onto the task stack
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*/
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.macro portSAVE_CONTEXT
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SEL RB0
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/* Save AX Register to stack. */
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PUSH AX
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PUSH HL
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/* Save CS register. */
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MOV A, CS
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XCH A, X
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/* Save ES register. */
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MOV A, ES
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PUSH AX
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/* Save the remaining general purpose registers from bank 0. */
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PUSH DE
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PUSH BC
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/* Save the other register banks - only necessary in the GCC port. */
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SEL RB1
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PUSH AX
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PUSH BC
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PUSH DE
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PUSH HL
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SEL RB2
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PUSH AX
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PUSH BC
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PUSH DE
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PUSH HL
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/* Registers in bank 3 are for ISR use only so don't need saving. */
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SEL RB0
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/* Save the usCriticalNesting value. */
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MOVW AX, !_usCriticalNesting
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PUSH AX
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/* Save the Stack pointer. */
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MOVW AX, !_pxCurrentTCB
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MOVW HL, AX
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MOVW AX, SP
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MOVW [HL], AX
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/* Switch stack pointers. */
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movw sp,#_stack /* Set stack pointer */
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.endm
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/*
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* portRESTORE_CONTEXT MACRO
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* Restores the task Stack Pointer then use this to restore usCriticalNesting,
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* general purpose registers and the CS and ES (only in far memory mode)
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* of the selected task from the task stack
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*/
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.macro portRESTORE_CONTEXT MACRO
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SEL RB0
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/* Restore the Stack pointer. */
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MOVW AX, !_pxCurrentTCB
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MOVW HL, AX
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MOVW AX, [HL]
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MOVW SP, AX
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/* Restore usCriticalNesting value. */
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POP AX
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MOVW !_usCriticalNesting, AX
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/* Restore the alternative register banks - only necessary in the GCC
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port. Register bank 3 is dedicated for interrupts use so is not saved or
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restored. */
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SEL RB2
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POP HL
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POP DE
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POP BC
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POP AX
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SEL RB1
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POP HL
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POP DE
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POP BC
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POP AX
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SEL RB0
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/* Restore the necessary general purpose registers. */
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POP BC
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POP DE
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/* Restore the ES register. */
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POP AX
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MOV ES, A
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/* Restore the CS register. */
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XCH A, X
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MOV CS, A
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/* Restore general purpose register HL. */
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POP HL
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/* Restore AX. */
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POP AX
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.endm
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