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arch: native: Run Zephyr natively in a POSIX OS

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A new arch (posix) which relies on pthreads to emulate the context
switching
A new soc for it (inf_clock) which emulates a CPU running at an
infinely high clock (so when the CPU is awaken it runs till completion
in 0 time)
A new board, which provides a trivial system tick timer and
irq generation.

Origin: Original

Fixes #1891

Signed-off-by: Alberto Escolar Piedras <alpi@oticon.com>
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
This commit is contained in:
Alberto Escolar Piedras 2017-10-03 16:31:55 +02:00 • committed by Anas Nashif
commit 76f7644118
42 changed files with 2324 additions and 9 deletions
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89
arch/posix/core/thread.c Normal file
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/*
* Copyright (c) 2010-2015 Wind River Systems, Inc.
* Copyright (c) 2017 Oticon A/S
*
* SPDX-License-Identifier: Apache-2.0
*/
/**
* @file
* @brief Thread support primitives
*
* This module provides core thread related primitives for the POSIX
* architecture
*/
#ifdef CONFIG_INIT_STACKS
#include <string.h>
#endif /* CONFIG_INIT_STACKS */
#include <toolchain.h>
#include <kernel_structs.h>
#include <wait_q.h>
#include "posix_core.h"
#include "posix_soc_if.h"
/**
* @brief Create a new kernel execution thread
*
* Initializes the k_thread object and sets up initial stack frame.
*
* @param thread pointer to thread struct memory, including any space needed
* for extra coprocessor context
* @param stack the pointer to aligned stack memory
* @param stack_size the stack size in bytes
* @param entry thread entry point routine
* @param arg1 first param to entry point
* @param arg2 second param to entry point
* @param arg3 third param to entry point
* @param priority thread priority
* @param options thread options: K_ESSENTIAL, K_FP_REGS, K_SSE_REGS
*
* Note that in this arch we cheat quite a bit: we use as stack a normal
* pthreads stack and therefore we ignore the stack size
*
*/
void _new_thread(struct k_thread *thread, k_thread_stack_t *stack,
size_t stack_size, k_thread_entry_t thread_func,
void *arg1, void *arg2, void *arg3,
int priority, unsigned int options)
{
char *stack_memory = K_THREAD_STACK_BUFFER(stack);
_ASSERT_VALID_PRIO(priority, thread_func);
posix_thread_status_t *thread_status;
_new_thread_init(thread, stack_memory, stack_size, priority, options);
/* We store it in the same place where normal archs store the
* "initial stack frame"
*/
thread_status = (posix_thread_status_t *)
STACK_ROUND_DOWN(stack_memory + stack_size
- sizeof(*thread_status));
/* _thread_entry() arguments */
thread_status->entry_point = thread_func;
thread_status->arg1 = arg1;
thread_status->arg2 = arg2;
thread_status->arg3 = arg3;
#if defined(CONFIG_ARCH_HAS_THREAD_ABORT)
thread_status->aborted = 0;
#endif
thread->callee_saved.thread_status = (u32_t)thread_status;
posix_new_thread(thread_status);
thread_monitor_init(thread);
}
void posix_new_thread_pre_start(void)
{
posix_irq_full_unlock();
}