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Eliminate _nano_start()

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The helper function _nano_start() is no longer required (due to the
recent relocation of boot banner and kernel build timestamp code),
so the kernel's initialization code calls _nano_fiber_swap() directly.

Change-Id: I06b9f473715afbfbdd4105b0def3445f1b2e3583
Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
This commit is contained in:
Allan Stephens 2015-04-14 14:46:26 -04:00 • committed by Anas Nashif
commit 2801be129a
6 changed files with 7 additions and 37 deletions
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2
include/nanokernel/arc/v2/init.h
View file

@ -40,7 +40,7 @@
#ifndef _ASMLANGUAGE
extern void _nano_init(nano_context_id_t, int argc, char *argv[], char *envp[]);
extern void _nano_start(void);
extern void _nano_fiber_swap(void);
#endif
#endif /* _ARCH_ARC_V2_INIT_H_ */

2
include/nanokernel/arm/CortexM/init.h
View file

@ -40,7 +40,7 @@ ARM-specific nanokernel initialization interface. Included by ARM/arch.h.
#ifndef _ASMLANGUAGE
extern void _nano_init(nano_context_id_t, int argc, char *argv[], char *envp[]);
extern void _nano_start(void);
extern void _nano_fiber_swap(void);
#endif
#endif /* _ARCH_ARM_CORTEXM_INIT_H_ */

2
include/nanokernel/x86/arch.h
View file

@ -594,7 +594,7 @@ typedef void (*NANO_EOI_GET_FUNC) (void *);
extern void _nano_init (nano_context_id_t dummyOutContext, int argc,
char *argv[], char *envp[]);
extern void _nano_start (void);
extern void _nano_fiber_swap (void);
extern unsigned int find_first_set (unsigned int op);

5
kernel/common/bsp/init.c
View file

@ -168,10 +168,9 @@ FUNC_NORETURN void _Cstart(void)
PRINT_BOOT_BANNER();
/* context switch into the background context (entry function is main())
*/
/* context switch into background context (entry function is main()) */
_nano_start();
_nano_fiber_swap();
/*
* Compiler can't tell that the above routines won't return and issues

28
kernel/nanokernel/core/nanofiber.c
View file

@ -298,31 +298,3 @@ FUNC_NORETURN void fiber_abort(void)
_nano_fiber_swap();
}
#endif
/*******************************************************************************
*
* _nano_start - start the nanokernel
*
* This routine is invoked as the last step of a BSP's _Cstart() implementation
* to start the nanokernel. The _nano_init() function is called early during
* the execution of _Cstart() to setup the various nanokernel data structures,
* but it's not until _nano_start() is invoked that a context switch into the
* "main" task is performed.
*
* This routine should only be called from a BSP's _Cstart() implementation
*
* RETURNS: This function never returns
*/
/*
* Print the boot banner if enabled
*/
#ifdef CONFIG_BOOT_BANNER
void _nano_start(void)
{
_nano_fiber_swap();
}
#else
FUNC_ALIAS(_nano_fiber_swap, _nano_start, void);
#endif

5
kernel/nanokernel/core/nanoinit.c
View file

@ -85,8 +85,7 @@ extern void main(int argc, char *argv[], char *envp[]);
* initialization sequence:
*
* crt0.s -> _Cstart() -> _nano_init()
* -> _nano_start() -> _Swap() (context switch into
*"main")
* -> _nano_fiber_swap()
*
* main () -> kernel_init () -> task_fiber_start(... K_swapper ...)
*
@ -96,7 +95,7 @@ extern void main(int argc, char *argv[], char *envp[]);
* the provided <dummyOutContext> tCCS, however _NanoKernel.fiber is set to
* NULL.
*
* Thus the subsequent invocation of _Swap() depicted above will result
* Thus the subsequent invocation of _nano_fiber_swap() depicted above results
* in a context switch into the main() routine. The <dummyOutContext> will
* be used as the context save area for the swap. Typically, <dummyOutContext>
* is a temp area on the current stack (as setup by crt0.s).