mirror of
https://github.com/zephyrproject-rtos/zephyr
synced 2025-09-15 11:11:56 +00:00
ddaebc15b3
Revises microkernel initialization code by incorporating the existing _k_kernel_init() and main() routines into _main(). This optimizes kernel initialization a bit, and allows application code to use main() if desired -- for example, as the entry point to an application task. The change also eliminates the need for sysgen to generate a routine whose content is always the same. This change preserves the existing order of operations done during kernel initialization, and leaves further improvements for later. Change-Id: Ie03d8a6f38f8a311f398667ed977fd8478719d70 Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
125 lines
3.7 KiB
C
125 lines
3.7 KiB
C
/* k_init.c */
|
|
|
|
/*
|
|
* Copyright (c) 1997-2010, 2012-2014 Wind River Systems, Inc.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1) Redistributions of source code must retain the above copyright notice,
|
|
* this list of conditions and the following disclaimer.
|
|
*
|
|
* 2) Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* 3) Neither the name of Wind River Systems nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software without
|
|
* specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <microkernel.h>
|
|
#include <micro_private.h>
|
|
#include <nano_private.h>
|
|
#include <string.h>
|
|
#include <toolchain.h>
|
|
#include <sections.h>
|
|
#include <device.h>
|
|
#include <init.h>
|
|
|
|
#ifdef CONFIG_BOOT_TIME_MEASUREMENT
|
|
#include <arch/cpu.h>
|
|
#endif
|
|
|
|
extern void _k_init_dynamic(void); /* defined by sysgen */
|
|
|
|
char __noinit __stack _k_server_stack[CONFIG_MICROKERNEL_SERVER_STACK_SIZE];
|
|
|
|
#ifdef CONFIG_TASK_DEBUG
|
|
int _k_debug_halt = 0;
|
|
#endif
|
|
|
|
#ifdef CONFIG_INIT_STACKS
|
|
static uint32_t _k_server_command_stack_storage
|
|
[CONFIG_COMMAND_STACK_SIZE] =
|
|
{ [0 ... CONFIG_COMMAND_STACK_SIZE - 1] = 0xAAAAAAAA };
|
|
#else
|
|
static uint32_t __noinit _k_server_command_stack_storage
|
|
[CONFIG_COMMAND_STACK_SIZE];
|
|
#endif
|
|
|
|
struct nano_stack _k_command_stack = {NULL,
|
|
_k_server_command_stack_storage,
|
|
_k_server_command_stack_storage};
|
|
|
|
|
|
extern void _k_server(int unused1, int unused2);
|
|
extern int _k_kernel_idle(void);
|
|
|
|
/**
|
|
*
|
|
* @brief Mainline for microkernel's idle task
|
|
*
|
|
* This routine completes kernel initialization and starts any application
|
|
* tasks in the EXE task group. From then on it takes care of doing idle
|
|
* processing whenever there is no other work for the kernel to do.
|
|
*
|
|
* @return N/A
|
|
*/
|
|
|
|
void _main(void)
|
|
{
|
|
_sys_device_do_config_level(NANO_EARLY);
|
|
_sys_device_do_config_level(NANO_LATE);
|
|
|
|
#ifdef CONFIG_BOOT_TIME_MEASUREMENT
|
|
/*
|
|
* record timestamp for microkernel's _main() function
|
|
*/
|
|
extern uint64_t __main_tsc;
|
|
|
|
__main_tsc = _NanoTscRead();
|
|
#endif
|
|
|
|
/*
|
|
* Most variables and data structure are statically initialized in
|
|
* kernel_main.c: this only initializes what must be dynamically
|
|
* initialized at runtime.
|
|
*/
|
|
_k_init_dynamic();
|
|
|
|
task_fiber_start(_k_server_stack,
|
|
CONFIG_MICROKERNEL_SERVER_STACK_SIZE,
|
|
_k_server,
|
|
0,
|
|
0,
|
|
CONFIG_MICROKERNEL_SERVER_PRIORITY,
|
|
0);
|
|
|
|
_sys_device_do_config_level(MICRO_EARLY);
|
|
_sys_device_do_config_level(MICRO_LATE);
|
|
_sys_device_do_config_level(APP_EARLY);
|
|
_sys_device_do_config_level(APP_LATE);
|
|
|
|
|
|
#ifdef CONFIG_WORKLOAD_MONITOR
|
|
_k_workload_monitor_calibrate();
|
|
#endif
|
|
|
|
task_group_start(EXE_GROUP);
|
|
|
|
_k_kernel_idle();
|
|
}
|