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2008-05-15 Joel Sherrill <joel.sherrill@OARcorp.com>

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* shared/bspstart.c, shared/start.S: Add capability for bootcard.c BSP
	Initialization Framework to ask the BSP where it has memory for the
	RTEMS Workspace and C Program Heap. These collectively are referred
	to as work area. If the BSP supports this, then it does not have to
	include code to split the available memory between the two areas.
	This reduces the amount of code in the BSP specific bspstart.c file.
	Additionally, the shared framework can initialize the C Library, call
	rtems_debug_enable(), and dirty the work area memory. Until most/all
	BSPs support this new capability, if the BSP supports this, it should
	call RTEMS_BSP_BOOTCARD_HANDLES_RAM_ALLOCATION from its configure.ac.
	When the transition is complete, this autoconf macro can be removed.
This commit is contained in:
Joel Sherrill
2008-05-15 15:53:23 +00:00
parent 5e5d0b16ed
commit 8f78ced725
3 changed files with 58 additions and 77 deletions
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14
c/src/lib/libbsp/sparc/ChangeLog
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@@ -1,3 +1,17 @@
2008-05-15 Joel Sherrill <joel.sherrill@OARcorp.com>
* shared/bspstart.c, shared/start.S: Add capability for bootcard.c BSP
Initialization Framework to ask the BSP where it has memory for the
RTEMS Workspace and C Program Heap. These collectively are referred
to as work area. If the BSP supports this, then it does not have to
include code to split the available memory between the two areas.
This reduces the amount of code in the BSP specific bspstart.c file.
Additionally, the shared framework can initialize the C Library, call
rtems_debug_enable(), and dirty the work area memory. Until most/all
BSPs support this new capability, if the BSP supports this, it should
call RTEMS_BSP_BOOTCARD_HANDLES_RAM_ALLOCATION from its configure.ac.
When the transition is complete, this autoconf macro can be removed.
2008-05-12 Joel Sherrill <joel.sherrill@OARcorp.com>
* shared/bspstart.c: Refactored and renamed initialization routines to

116
c/src/lib/libbsp/sparc/shared/bspstart.c
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@@ -1,10 +1,8 @@
/*
* This set of routines starts the application. It includes application,
* board, and monitor specific initialization and configuration.
* The generic CPU dependent initialization has been performed
* before any of these are invoked.
* This set of routines are the BSP specific initialization
* support routines.
*
* COPYRIGHT (c) 1989-2006.
* COPYRIGHT (c) 1989-2008.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
@@ -21,9 +19,6 @@
* $Id$
*/
/* must be identical to STACK_SIZE in start.S */
#define STACK_SIZE 16 * 1024
#include <string.h>
#include <bsp.h>
@@ -32,93 +27,68 @@
#include <rtems/bspIo.h>
/*
* Tells us where to put the workspace in case remote debugger is present.
* LEON2 Cache Snooping Support
*/
extern uint32_t rdb_start;
#ifdef LEON2
/*
* Tells us if data cache snooping is available
*/
/*
* Tells us if data cache snooping is available
*/
int CPU_SPARC_HAS_SNOOPING;
int CPU_SPARC_HAS_SNOOPING;
/*
* set_snooping
*
* Read the data cache configuration register to determine if
* bus snooping is available. This is needed for some drivers so
* that they can select the most efficient copy routines.
*/
static inline int set_snooping(void)
{
unsigned int tmp = *(unsigned int *)0x80000014; /* Cache control register */
return ((tmp>>23) & 1); /* Data cache snooping enabled */
}
#endif
/*
* Use the shared implementations of the following routines
*/
void bsp_libc_init( void *, uint32_t, int );
extern void bsp_spurious_initialize();
#ifdef LEON2
/*
* set_snooping
*
* Read the data cache configuration register to determine if
* bus snooping is available. This is needed for some drivers so
* that they can select the most efficient copy routines.
*
*/
static inline int set_snooping(void)
{
unsigned int tmp = *(unsigned int *)0x80000014; /* Cache control register */
return ((tmp>>23) & 1); /* Data cache snooping enabled */
}
#endif
/*
* bsp_pretasking_hook
*
* BSP pretasking hook. Called just before drivers are initialized.
* Used to setup libc and install any BSP extensions.
*/
void bsp_pretasking_hook(void)
{
extern int end;
uint32_t heap_start;
uint32_t heap_size;
heap_start = (uint32_t) &end;
if (heap_start & (CPU_ALIGNMENT-1))
heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
heap_size = Configuration.work_space_start - (void *)&end - STACK_SIZE;
heap_size &= 0xfffffff0; /* keep it as a multiple of 16 bytes */
bsp_libc_init((void *) heap_start, heap_size, 0);
#ifdef RTEMS_DEBUG
rtems_debug_enable( RTEMS_DEBUG_ALL_MASK );
#endif
extern void bsp_spurious_initialize();
bsp_spurious_initialize();
}
/*
* This method returns the base address and size of the area which
* is to be allocated between the RTEMS Workspace and the C Program
* Heap.
*/
void bsp_get_workarea(
void **workarea_base,
size_t *workarea_size,
size_t *requested_heap_size
)
{
/* Tells us where to put the workspace in case remote debugger is present. */
extern uint32_t rdb_start;
/* must be identical to STACK_SIZE in start.S */
#define STACK_SIZE (16 * 1024)
*workarea_base = &end;
*workarea_size = (void *)rdb_start - (void *)&end - STACK_SIZE;
*requested_heap_size = 0;
}
/*
* bsp_start
*
* This routine does the bulk of the system initialization.
*/
void bsp_start( void )
{
unsigned char *work_space_start;
work_space_start =
(unsigned char *)rdb_start - rtems_configuration_get_work_space_size();
if ( work_space_start <= (unsigned char *)&end ) {
printk( "bspstart: Not enough RAM!!!\n" );
BSP_fatal_return();
}
Configuration.work_space_start = work_space_start;
#ifdef LEON2
CPU_SPARC_HAS_SNOOPING = set_snooping();
CPU_SPARC_HAS_SNOOPING = set_snooping();
#endif
}

5
c/src/lib/libbsp/sparc/shared/start.S
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@@ -223,11 +223,8 @@ SYM(hard_reset):
set (SYM(rdb_start)), %g6 ! End of work-space area
st %sp, [%g6]
set (SYM(Configuration)), %l1
ld [%l1+4], %l3 ! work_space_size
sub %sp, %l3, %sp ! set %sp to area below work_space
sub %g6, 4, %sp ! stack starts at end of RAM - 4
andn %sp, 0x0f, %sp ! align stack on 16-byte boundary
mov %sp, %fp ! Set frame pointer
nop