Rename nanokernel files
Makes various nanokernel file names more accurately reflect their actual roles, and improves consistency with other naming conventions. Change-Id: Ibea5a66a8d66c4e41810d6b3d70b4c459a3848a8 Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
This commit is contained in:
Allan Stephens
Anas Nashif
parent
4d30cd8408
commit
32826127de
5 changed files with 9 additions and 9 deletions
268
kernel/nanokernel/nano_init.c
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268
kernel/nanokernel/nano_init.c
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/* nanokernel initialization module */
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/*
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* Copyright (c) 2010-2014 Wind River Systems, Inc.
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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 are met:
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*
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* 1) Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2) Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3) Neither the name of Wind River Systems nor the names of its contributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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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/*
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DESCRIPTION
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This module contains routines that are used to initialize the nanokernel.
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*/
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#include <offsets.h>
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#include <cputype.h>
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#include <nanokernel.h>
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#include <nanokernel/cpu.h>
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#include <misc/printk.h>
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#include <drivers/rand32.h>
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#include <sections.h>
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#include <toolchain.h>
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#include <nanok.h>
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#ifdef CONFIG_MICROKERNEL
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#include <minik.h>
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#endif /* CONFIG_MICROKERNEL */
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/* kernel build timestamp items */
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#define BUILD_TIMESTAMP "BUILD: " __DATE__ " " __TIME__
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#ifdef CONFIG_BUILD_TIMESTAMP
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const char * const build_timestamp = BUILD_TIMESTAMP;
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#endif
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/* boot banner items */
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#define BOOT_BANNER "****** BOOTING VXMICRO ******"
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#if !defined(CONFIG_BOOT_BANNER)
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#define PRINT_BOOT_BANNER() do { } while (0)
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#elif !defined(CONFIG_BUILD_TIMESTAMP)
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#define PRINT_BOOT_BANNER() printk(BOOT_BANNER "\n")
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#else
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#define PRINT_BOOT_BANNER() printk(BOOT_BANNER " %s\n", build_timestamp)
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#endif
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/* stack space for the background (or idle) task context */
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static char __noinit main_task_stack[CONFIG_MAIN_STACK_SIZE];
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/*
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* storage space for the interrupt stack
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*
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* Note: This area is used as the system stack during nanokernel initialization,
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* since the nanokernel hasn't yet set up its own stack areas. The dual
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* purposing of this area is safe since interrupts are disabled until the
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* nanokernel context switches to the background (or idle) task.
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*/
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#ifndef CONFIG_NO_ISRS
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char __noinit _interrupt_stack[CONFIG_ISR_STACK_SIZE];
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#endif
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/*
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* entry point for background task in a nanokernel-only system,
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* or the idle task in a microkernel system
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*/
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extern void main(void);
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/* hardware initialization routine provided by BSP */
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extern void _InitHardware(void);
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/* constructor initialization */
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extern void _Ctors(void);
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/*******************************************************************************
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*
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* nano_init - initializes nanokernel data structures
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*
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* This routine initializes various nanokernel data structures, including
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* the background (or idle) task and any architecture-specific initialization.
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*
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* Note that all fields of "_nanokernel" are set to zero on entry, which may
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* be all the initialization many of them require.
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*
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* RETURNS: N/A
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*/
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static void nano_init(tCCS *dummyOutContext)
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{
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/*
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* Initialize the current execution context to permit a level of debugging
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* output if an exception should happen during nanokernel initialization.
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* However, don't waste effort initializing the fields of the dummy context
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* beyond those needed to identify it as a dummy context.
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*/
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_nanokernel.current = dummyOutContext;
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dummyOutContext->link =
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(tCCS *)NULL; /* context not inserted into list */
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dummyOutContext->flags = FIBER | ESSENTIAL;
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dummyOutContext->prio = 0;
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#ifndef CONFIG_NO_ISRS
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/*
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* The interrupt library needs to be initialized early since a series of
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* handlers are installed into the interrupt table to catch spurious
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* interrupts. This must be performed before other nanokernel subsystems
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* install bonafide handlers, or before hardware device drivers are
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* initialized (in the BSPs' _InitHardware).
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*/
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_IntLibInit();
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#endif
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/*
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* Initialize the context control block (CCS) for the background task
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* (or idle task). The entry point for this context is 'main'.
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*/
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_nanokernel.task =
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_NewContext(main_task_stack, /* pStackMem */
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CONFIG_MAIN_STACK_SIZE, /* stackSize */
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(_ContextEntry)main, /* pEntry */
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(_ContextArg)0, /* parameter1 */
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(_ContextArg)0, /* parameter2 */
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(_ContextArg)0, /* parameter3 */
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-1, /* priority */
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0 /* options */
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);
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/* indicate that failure of this task may be fatal to the entire system */
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_nanokernel.task->flags |= ESSENTIAL;
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#if defined(CONFIG_MICROKERNEL)
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/* fill in microkernel's TCB with info about the idle task */
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_k_task_list[_k_task_count].workspace = (char *)_nanokernel.task;
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_k_task_list[_k_task_count].worksize = CONFIG_MAIN_STACK_SIZE;
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#endif
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/* perform any architecture-specific initialization */
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nanoArchInit();
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}
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#ifdef CONFIG_STACK_CANARIES
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/*******************************************************************************
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*
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* STACK_CANARY_INIT - initialize the kernel's stack canary
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*
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* This macro initializes the kernel's stack canary global variable,
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* __stack_chk_guard, with a random value.
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*
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* INTERNAL
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* Modifying __stack_chk_guard directly at runtime generates a build error
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* with ICC 13.0.2 20121114 on Windows 7. In-line assembly is used as a
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* workaround.
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*/
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extern void *__stack_chk_guard;
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#if defined(VXMICRO_ARCH_x86)
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#define _MOVE_INSTR "movl "
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#elif defined(VXMICRO_ARCH_arm)
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#define _MOVE_INSTR "str "
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#else
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#error "Unknown VXMICRO_ARCH type"
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#endif /* VXMICRO_ARCH */
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#define STACK_CANARY_INIT() \
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do { \
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register void *tmp; \
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_Rand32Init(); \
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tmp = (void *)_Rand32Get(); \
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__asm__ volatile(_MOVE_INSTR "%1, %0;\n\t" \
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: "=m"(__stack_chk_guard) \
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: "r"(tmp)); \
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} while (0)
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#else /* !CONFIG_STACK_CANARIES */
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#define STACK_CANARY_INIT()
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#endif /* CONFIG_STACK_CANARIES */
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/*******************************************************************************
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*
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* _Cstart - initialize nanokernel
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*
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* This routine is invoked by the BSP when the system is ready to run C code.
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* The processor must be running in 32-bit mode, and the BSS must have been
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* cleared/zeroed.
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*
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* RETURNS: Does not return
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*/
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FUNC_NORETURN void _Cstart(void)
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{
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/* floating point operations are NOT performed during nanokernel init */
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char dummyCCS[__tCCS_NOFLOAT_SIZEOF];
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/*
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* Initialize nanokernel data structures. This step includes
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* initializing the interrupt subsystem, which must be performed
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* before the hardware initialization phase.
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*/
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nano_init((tCCS *)&dummyCCS);
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/* perform basic hardware initialization */
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_InitHardware();
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/* initialize stack canaries */
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STACK_CANARY_INIT();
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/* invoke C++ constructors */
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_Ctors();
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/* display boot banner */
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PRINT_BOOT_BANNER();
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/* context switch into background context (entry function is main()) */
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_nano_fiber_swap();
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/*
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* Compiler can't tell that the above routines won't return and issues
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* a warning unless we explicitly tell it that control never gets this
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* far.
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*/
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CODE_UNREACHABLE;
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}
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