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/**
* @file
*
* @ingroup bsp_bootcard
*
* @brief Standard system startup.
*/
/*
* Copyright (c) 2008-2012 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Obere Lagerstr. 30
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*/
/**
* @defgroup bsp_kit Board Support Package
*
* @brief Board support package dependent code.
*/
#ifndef LIBBSP_SHARED_BOOTCARD_H
#define LIBBSP_SHARED_BOOTCARD_H
#include <unistd.h>
#include <rtems/malloc.h>
#include <rtems/bspIo.h>
#include <bspopts.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/**
* @defgroup bsp_bootcard Bootcard
*
* @ingroup bsp_kit
*
* @brief Standard system startup.
*
* @{
*/
/**
* @brief Global pointer to the command line of boot_card().
*/
extern const char *bsp_boot_cmdline;
void bsp_start(void);
void bsp_pretasking_hook(void);
void bsp_predriver_hook(void);
void bsp_postdriver_hook(void);
void bsp_cleanup(uint32_t status);
void bsp_reset(void);
/**
* @brief Standard system initialization procedure.
*
* You may pass a command line in @a cmdline. It is later available via the
* global @ref bsp_boot_cmdline variable.
*
* This is the C entry point for ALL RTEMS BSPs. It is invoked from the
* assembly language initialization file usually called @c start.S which does
* the basic CPU setup (stack, C runtime environment, zero BSS, load other
* sections) and calls afterwards boot_card(). The boot card function provides
* the framework for the BSP initialization sequence. The basic flow of
* initialization is:
*
* - disable interrupts, interrupts will be enabled during the first context
* switch
* - bsp_start() - more advanced initialization
* - bsp_work_area_initialize() - initialize the RTEMS Workspace and the C
* Program Heap
* - rtems_initialize_data_structures()
* - initialize C Library
* - bsp_pretasking_hook()
* - if defined( RTEMS_DEBUG )
* - rtems_debug_enable( RTEMS_DEBUG_ALL_MASK )
* - rtems_initialize_before_drivers()
* - bsp_predriver_hook()
* - rtems_initialize_device_drivers()
* - initialization of all device drivers
* - bsp_postdriver_hook()
* - rtems_initialize_start_multitasking()
* - 1st task executes C++ global constructors
* - .... application runs ...
* - exit
* - back to here eventually
* - bsp_cleanup()
*
* If something goes wrong bsp_cleanup() will be called out of order.
*
* This style of initialization ensures that the C++ global constructors are
* executed after RTEMS is initialized.
*/
uint32_t boot_card(const char *cmdline);
#ifdef CONFIGURE_MALLOC_BSP_SUPPORTS_SBRK
/**
* @brief Gives the BSP a chance to reduce the work area size with sbrk()
* adding more later.
*
* bsp_sbrk_init() may reduce the work area size passed in. The routine
* returns the 'sbrk_amount' to be used when extending the heap. Note that
* the return value may be zero.
*
* In case the @a area size is altered, then the remaining size of the
* @a area must be greater than or equal to @a min_size.
*/
ptrdiff_t bsp_sbrk_init(Heap_Area *area, uintptr_t min_size);
#endif
static inline void bsp_work_area_initialize_default(
void *area_begin,
uintptr_t area_size
)
{
Heap_Area area = {
.begin = area_begin,
.size = area_size
};
#if BSP_DIRTY_MEMORY == 1
memset(area.begin, 0xCF, area.size);
#endif
#ifdef CONFIGURE_MALLOC_BSP_SUPPORTS_SBRK
{
uintptr_t overhead = _Heap_Area_overhead(CPU_HEAP_ALIGNMENT);
uintptr_t work_space_size = rtems_configuration_get_work_space_size();
ptrdiff_t sbrk_amount = bsp_sbrk_init(
&area,
work_space_size
+ overhead
+ (rtems_configuration_get_unified_work_area() ? 0 : overhead)
);
rtems_heap_set_sbrk_amount(sbrk_amount);
}
#endif
/*
* The following may be helpful in debugging what goes wrong when
* you are allocating the Work Area in a new BSP.
*/
#ifdef BSP_GET_WORK_AREA_DEBUG
{
void *sp = __builtin_frame_address(0);
void *end = (char *) area.begin + area.size;
printk(
"work_area_start = 0x%p\n"
"work_area_size = %lu 0x%08lx\n"
"end = 0x%p\n"
"current stack pointer = 0x%p%s\n",
area.begin,
(unsigned long) area.size, /* decimal */
(unsigned long) area.size, /* hexadecimal */
end,
sp,
(uintptr_t) sp >= (uintptr_t) area.begin
&& (uintptr_t) sp <= (uintptr_t) end ?
" OVERLAPS!" : ""
);
}
#endif
_Workspace_Handler_initialization(&area, 1, NULL);
#ifdef BSP_GET_WORK_AREA_DEBUG
printk(
"heap_start = 0x%p\n"
"heap_size = %lu\n",
area.begin,
(unsigned long) area.size
);
#endif
RTEMS_Malloc_Initialize(&area, 1, NULL);
}
void bsp_work_area_initialize(void);
void bsp_libc_init(void);
/** @} */
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* LIBBSP_SHARED_BOOTCARD_H */
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