sched: major refactor
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parent
f4e321932f
commit
f49a6643d7
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@ -3,16 +3,14 @@
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#include <arch/sched.h>
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#include <arch/sched.h>
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#include <arch/at91sam3x8e/hardware.h>
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#include <arch/at91sam3x8e/hardware.h>
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#include <arch/at91sam3x8e/interrupt.h>
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#include <ardix/string.h>
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#include <ardix/string.h>
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#include <ardix/sched.h>
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#include <ardix/sched.h>
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#include <stdbool.h>
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#include <stdbool.h>
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#include <toolchain.h>
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#include <toolchain.h>
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#ifdef __cplusplus
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extern "C"
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{
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#endif /* __cplusplus */
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/**
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/**
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* Set the PENDSV bit in the system control block.
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* Set the PENDSV bit in the system control block.
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*/
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*/
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@ -30,7 +28,7 @@ void irq_sys_tick(void)
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sched_pendsv_req();
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sched_pendsv_req();
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}
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}
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void sched_init_process_regs(struct reg_snapshot *reg_snap, void (*entry)(void))
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void sched_init_process_regs(struct reg_snapshot *reg_snap, int (*entry)(void))
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{
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{
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memset(reg_snap, 0, sizeof(*reg_snap));
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memset(reg_snap, 0, sizeof(*reg_snap));
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@ -57,7 +55,7 @@ static inline void sched_nvic_set_prio_group(uint32_t prio_group)
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REG_SCB_AIRCR = reg_val;
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REG_SCB_AIRCR = reg_val;
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}
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}
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int sched_hwtimer_init(unsigned int freq)
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int arch_sched_hwtimer_init(unsigned int freq)
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{
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{
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uint32_t ticks = sys_core_clock / freq;
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uint32_t ticks = sys_core_clock / freq;
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if (ticks > REG_SYSTICK_LOAD_RELOAD_MASK)
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if (ticks > REG_SYSTICK_LOAD_RELOAD_MASK)
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@ -75,14 +73,13 @@ int sched_hwtimer_init(unsigned int freq)
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return 0;
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return 0;
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}
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}
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inline void sched_atomic_enter(void)
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void arch_sched_process_init(struct process *process, void (*entry)(void))
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{
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{
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REG_SYSTICK_CTRL &= ~REG_SYSTICK_CTRL_ENABLE_BIT;
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struct reg_snapshot *regs = process->stack_bottom - sizeof(*regs);
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}
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process->sp = regs;
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inline void sched_atomic_leave(bool resched)
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memset(regs, 0, sizeof(*regs));
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{
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regs->hw.pc = (void *)((uint32_t)entry | 1U); /* thumb instruction set flag */
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REG_SYSTICK_CTRL |= REG_SYSTICK_CTRL_ENABLE_BIT;
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}
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}
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void sched_exec_early(void)
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void sched_exec_early(void)
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@ -91,10 +88,6 @@ void sched_exec_early(void)
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sched_pendsv_req();
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sched_pendsv_req();
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}
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}
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#ifdef __cplusplus
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} /* extern "C" */
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#endif /* __cplusplus */
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/*
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/*
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* Copyright (c) 2020 Felix Kopp <sandtler@sandtler.club>
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* Copyright (c) 2020 Felix Kopp <sandtler@sandtler.club>
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*
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*
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@ -20,7 +20,7 @@ void irq_svc(void);
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/** Debug handler (reserved) */
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/** Debug handler (reserved) */
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void irq_debug_mon(void);
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void irq_debug_mon(void);
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/** Pending SV interrupt handler */
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/** Pending SV interrupt handler */
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extern void irq_pend_sv(void);
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void irq_pend_sv(void);
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/** SysTick interrupt handler */
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/** SysTick interrupt handler */
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void irq_sys_tick(void);
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void irq_sys_tick(void);
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@ -0,0 +1,45 @@
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/* SPDX-License-Identifier: BSD-3-Clause */
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/* See the end of this file for copyright, licensing, and warranty information. */
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#pragma once
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#include <arch/at91sam3x8e/interrupt.h>
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#include <ardix/sched.h>
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#include <toolchain.h>
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/** Enter atomic context, i.e. disable preemption */
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__always_inline void sched_atomic_enter(void)
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{
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arch_irq_disable(IRQNO_PEND_SV);
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}
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/** Leave atomic context, i.e. re-enable preemption */
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__always_inline void sched_atomic_leave(void)
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{
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arch_irq_enable(IRQNO_PEND_SV);
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}
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/*
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* Copyright (c) 2020 Felix Kopp <sandtler@sandtler.club>
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*
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* Redistribution and use in source and binary forms, with or without modification, are permitted
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* provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this list of
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* conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other materials
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* provided with the distribution.
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* 3. Neither the name of the copyright holder nor the names of its contributors may be
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* used to endorse or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
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* WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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@ -4,43 +4,34 @@
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#pragma once
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#pragma once
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#include <arch/hardware.h>
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#include <arch/hardware.h>
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#include <stdbool.h>
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#include <stdbool.h>
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#include <toolchain.h>
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struct process; /* see include/ardix/sched.h */
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/**
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/**
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* Initialize a hardware timer for schduling.
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* Initialize a hardware timer for schduling.
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*
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*
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* @param freq: The timer frequency in Hertz.
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* @param freq: The timer frequency in Hertz.
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*/
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*/
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int sched_hwtimer_init(unsigned int freq);
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int arch_sched_hwtimer_init(unsigned int freq);
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/**
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/**
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* Disable all scheduling interrupts in order to enter atomic context.
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* Initialize a new process.
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*/
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* This requires the process' `stack_base` field to be initialized as the
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void sched_atomic_enter(void);
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* initial register values are written to the stack.
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/**
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* Re-enable scheduling interrupts, i.e. leave atomic context.
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*
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*
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* @param resched: If `true`, request the scheduler to proceed to the next
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* @param process: The process.
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* process ASAP. Until then, put the CPU to sleep if required.
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*/
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void sched_atomic_leave(bool resched);
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/**
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* Infinite loop of sleep instructions.
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*/
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void sched_idle_process_loop(void);
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/**
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* Initialize the register values of a newly allocated process image.
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* Called by the scheduling subsystem when a process is being created.
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*
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* @param reg_snap: The stack memory location where the initial register values
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* are to be loaded from.
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* @param entry: The process entry point.
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* @param entry: The process entry point.
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*/
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*/
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void sched_init_process_regs(struct reg_snapshot *reg_snap,
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void arch_sched_process_init(struct process *process, void (*entry)(void));
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void (*entry)(void));
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#ifdef ARCH_AT91SAM3X8E
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#include <arch/at91sam3x8e/sched.h>
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#else
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#error "Unsupported architecture"
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#endif
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/*
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/*
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* Copyright (c) 2020 Felix Kopp <sandtler@sandtler.club>
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* Copyright (c) 2020 Felix Kopp <sandtler@sandtler.club>
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