mirror of
https://github.com/kelvinlawson/atomthreads.git
synced 2026-10-13 01:37:01 +02:00
Tido Klaassen
792213d66b
- archContextSwitch stores address of new thread's struct reent in ctx_switch_info - pend_sv_handler uses address in ctx_switch_info.reent instead of fixed offset into atom_tcb - added header with defines for offsets into struct ctx_switch_info used in assembler code. Also added compile time verification for this offsets
121 lines
3.6 KiB
C
121 lines
3.6 KiB
C
/*
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* Copyright (c) 2015, Tido Klaassen. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. No personal names or organizations' names associated with the
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* Atomthreads project may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE ATOMTHREADS PROJECT AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __ATOMPORT_PRIVATE_H_
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#define __ATOMPORT_PRIVATE_H_
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#include "atomport.h"
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#include "atom.h"
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/**
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* context saved automagically by exception entry
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*/
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struct isr_stack {
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uint32_t r0;
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uint32_t r1;
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uint32_t r2;
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uint32_t r3;
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uint32_t r12;
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uint32_t lr;
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uint32_t pc;
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uint32_t psr;
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} __attribute__((packed));
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struct isr_fpu_stack {
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uint32_t s0;
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uint32_t s1;
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uint32_t s2;
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uint32_t s3;
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uint32_t s4;
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uint32_t s5;
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uint32_t s6;
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uint32_t s7;
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uint32_t s8;
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uint32_t s9;
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uint32_t s10;
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uint32_t s11;
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uint32_t s12;
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uint32_t s13;
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uint32_t s14;
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uint32_t s15;
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uint32_t fpscr;
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} __attribute__((packed));
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/**
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* remaining context saved by task switch ISR
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*/
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struct task_stack {
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uint32_t r4;
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uint32_t r5;
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uint32_t r6;
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uint32_t r7;
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uint32_t r8;
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uint32_t r9;
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uint32_t r10;
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uint32_t r11;
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uint32_t exc_ret;
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} __attribute__((packed));
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struct task_fpu_stack {
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uint32_t s16;
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uint32_t s17;
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uint32_t s18;
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uint32_t s19;
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uint32_t s20;
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uint32_t s21;
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uint32_t s22;
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uint32_t s23;
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uint32_t s24;
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uint32_t s25;
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uint32_t s26;
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uint32_t s27;
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uint32_t s28;
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uint32_t s29;
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uint32_t s30;
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uint32_t s31;
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} __attribute__((packed));
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/**
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* Info needed by pend_sv_handler used for delayed task switching.
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* Running_tcb is a pointer to the TCB currently running (gosh, really?!)
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* next_tcb is a pointer to a TCB that should be running.
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* archContextSwitch() will update next_tcb and trigger a pend_sv. The
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* pend_sv_handler will be called as soon as all other ISRs have returned,
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* do the real context switch and update running_tcb.
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*/
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struct task_switch_info {
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volatile struct atom_tcb *running_tcb;
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volatile struct atom_tcb *next_tcb;
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#if defined(__NEWLIB__)
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struct _reent *reent;
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#endif
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} __attribute__((packed));
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#endif /* __ATOMPORT_PRIVATE_H_ */
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