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2003-03-18 Till Straumann <strauman@slac.stanford.edu>

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PR 356/bsps
	This patch makes RTEMS/powerpc/shared EABI compliant.
	* irq/irq_init.c, start/Makefile.am, start/start.S, startup/bspstart.c,
	startup/pgtbl_setup.c, vectors/vectors.h, vectors/vectors_init.c:
	zero_bss() should clear not only bss but sbss and sbss2
	also (this is probably a bugfix, as sbss/sbss2 are
	probably used even if -msdata=eabi is not specified).
	* start/rtems_crti.S: New file which must
	be linked immediately after ecrti.o. rtems_crti.o contains
	a code snippet who lets __init() return immediately. Also,
	a new entry point '_init' to the C++ Ctors is generated
	for use by the RTEMS Thread_Handler.
This commit is contained in:
Joel Sherrill
2003-03-18 19:24:59 +00:00
parent 2e0ee93e04
commit 2ae52c7583
8 changed files with 49 additions and 22 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
c/src/lib/libbsp/powerpc/shared/ChangeLog
View File

@@ -1,3 +1,18 @@
2003-03-18 Till Straumann <strauman@slac.stanford.edu>
PR 356/bsps
This patch makes RTEMS/powerpc/shared EABI compliant.
* irq/irq_init.c, start/Makefile.am, start/start.S, startup/bspstart.c,
startup/pgtbl_setup.c, vectors/vectors.h, vectors/vectors_init.c:
zero_bss() should clear not only bss but sbss and sbss2
also (this is probably a bugfix, as sbss/sbss2 are
probably used even if -msdata=eabi is not specified).
* start/rtems_crti.S: New file which must
be linked immediately after ecrti.o. rtems_crti.o contains
a code snippet who lets __init() return immediately. Also,
a new entry point '_init' to the C++ Ctors is generated
for use by the RTEMS Thread_Handler.
2003-02-20 Till Straumann <strauman@slac.stanford.edu>
PR 349/bsps

8
c/src/lib/libbsp/powerpc/shared/irq/irq_init.c
View File

@@ -43,9 +43,9 @@ typedef struct {
pci_isa_bridge_device* via_82c586 = 0;
static pci_isa_bridge_device bridge;
extern unsigned int external_exception_vector_prolog_code_size;
extern unsigned int external_exception_vector_prolog_code_size[];
extern void external_exception_vector_prolog_code();
extern unsigned int decrementer_exception_vector_prolog_code_size;
extern unsigned int decrementer_exception_vector_prolog_code_size[];
extern void decrementer_exception_vector_prolog_code();
/*
@@ -296,7 +296,7 @@ void BSP_rtems_irq_mng_init(unsigned cpuId)
vectorDesc.exceptIndex = ASM_DEC_VECTOR;
vectorDesc.hdl.vector = ASM_DEC_VECTOR;
vectorDesc.hdl.raw_hdl = decrementer_exception_vector_prolog_code;
vectorDesc.hdl.raw_hdl_size = (unsigned) &decrementer_exception_vector_prolog_code_size;
vectorDesc.hdl.raw_hdl_size = (unsigned) decrementer_exception_vector_prolog_code_size;
vectorDesc.on = nop_func;
vectorDesc.off = nop_func;
vectorDesc.isOn = connected;
@@ -306,7 +306,7 @@ void BSP_rtems_irq_mng_init(unsigned cpuId)
vectorDesc.exceptIndex = ASM_EXT_VECTOR;
vectorDesc.hdl.vector = ASM_EXT_VECTOR;
vectorDesc.hdl.raw_hdl = external_exception_vector_prolog_code;
vectorDesc.hdl.raw_hdl_size = (unsigned) &external_exception_vector_prolog_code_size;
vectorDesc.hdl.raw_hdl_size = (unsigned) external_exception_vector_prolog_code_size;
if (!mpc60x_set_exception (&vectorDesc)) {
BSP_panic("Unable to initialize RTEMS external raw exception\n");
}

4
c/src/lib/libbsp/powerpc/shared/start/Makefile.am
View File

@@ -3,8 +3,8 @@
##
S_FILES = start.S
S_FILES = start.S rtems_crti.S
EXTRA_DIST = start.S
EXTRA_DIST = start.S rtems_crti.S
include $(top_srcdir)/../../../../../automake/local.am

4
c/src/lib/libbsp/powerpc/shared/start/start.S
View File

@@ -27,7 +27,8 @@
mtmsr r10 ; \
li r10,0x63 ; \
sc
.text
.globl __rtems_entry_point
.type __rtems_entry_point,@function
@@ -86,6 +87,7 @@ __rtems_entry_point:
enter_C_code:
bl MMUon
bl __eabi /* setup EABI and SYSV environment */
bl zero_bss
/*
* restore prep boot params

24
c/src/lib/libbsp/powerpc/shared/startup/bspstart.c
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@@ -36,9 +36,7 @@
#include <bsp/motorola.h>
extern void _return_to_ppcbug();
extern unsigned long __rtems_end;
extern unsigned long _end;
extern unsigned long __bss_start;
extern unsigned long __rtems_end[];
extern void L1_caches_enables();
extern unsigned get_L2CR();
extern void set_L2CR(unsigned);
@@ -135,7 +133,7 @@ void bsp_pretasking_hook(void)
rtems_unsigned32 heap_start;
rtems_unsigned32 heap_size;
heap_start = ((rtems_unsigned32) &__rtems_end) +INIT_STACK_SIZE + INTR_STACK_SIZE;
heap_start = ((rtems_unsigned32) __rtems_end) +INIT_STACK_SIZE + INTR_STACK_SIZE;
if (heap_start & (CPU_ALIGNMENT-1))
heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1);
@@ -153,7 +151,12 @@ void bsp_pretasking_hook(void)
void zero_bss()
{
memset(&__bss_start, 0, ((unsigned) (&__rtems_end)) - ((unsigned) &__bss_start));
/* prevent these from being accessed in the short data areas */
extern unsigned long __bss_start[], __SBSS_START__[], __SBSS_END__[];
extern unsigned long __SBSS2_START__[], __SBSS2_END__[];
memset(__SBSS_START__, 0, ((unsigned) __SBSS_END__) - ((unsigned)__SBSS_START__));
memset(__SBSS2_START__, 0, ((unsigned) __SBSS2_END__) - ((unsigned)__SBSS2_START__));
memset(__bss_start, 0, ((unsigned) __rtems_end) - ((unsigned)__bss_start));
}
void save_boot_params(RESIDUAL* r3, void *r4, void* r5, char *additional_boot_options)
@@ -209,7 +212,7 @@ void bsp_start( void )
* so there is no need to set it in r1 again... It is just for info
* so that It can be printed without accessing R1.
*/
stack = ((unsigned char*) &__rtems_end) + INIT_STACK_SIZE - CPU_MINIMUM_STACK_FRAME_SIZE;
stack = ((unsigned char*) __rtems_end) + INIT_STACK_SIZE - CPU_MINIMUM_STACK_FRAME_SIZE;
/* tag the bottom (T. Straumann 6/36/2001 <strauman@slac.stanford.edu>) */
*((unsigned32 *)stack) = 0;
@@ -222,9 +225,12 @@ void bsp_start( void )
* This could be done latter (e.g in IRQ_INIT) but it helps to understand
* some settings below...
*/
intrStack = ((unsigned char*) &__rtems_end) + INIT_STACK_SIZE + INTR_STACK_SIZE - CPU_MINIMUM_STACK_FRAME_SIZE;
intrStack = ((unsigned char*) __rtems_end) + INIT_STACK_SIZE + INTR_STACK_SIZE - CPU_MINIMUM_STACK_FRAME_SIZE;
/* tag the bottom (T. Straumann 6/36/2001 <strauman@slac.stanford.edu>) */
/* make sure it's properly aligned */
(unsigned32)intrStack &= ~(CPU_STACK_ALIGNMENT-1);
/* tag the bottom (T. Straumann 6/36/2001 <strauman@slac.stanford.edu>) */
*((unsigned32 *)intrStack) = 0;
_write_SPR1((unsigned int)intrStack);
@@ -357,7 +363,7 @@ void bsp_start( void )
work_space_start =
(unsigned char *)BSP_mem_size - BSP_Configuration.work_space_size;
if ( work_space_start <= ((unsigned char *)&__rtems_end) + INIT_STACK_SIZE + INTR_STACK_SIZE) {
if ( work_space_start <= ((unsigned char *)__rtems_end) + INIT_STACK_SIZE + INTR_STACK_SIZE) {
printk( "bspstart: Not enough RAM!!!\n" );
bsp_cleanup();
}

8
c/src/lib/libbsp/powerpc/shared/startup/pgtbl_setup.c
View File

@@ -50,14 +50,14 @@ unsigned ldPtSize,tmp;
/* get those from the linker script.
* NOTE THAT THE CORRECTNESS OF THE LINKER SCRIPT IS CRUCIAL
*/
extern unsigned long __DATA_START__, _etext;
extern unsigned long __DATA_START__[], _etext[];
/* map text and RO data read-only */
tmp = triv121PgTblMap(
pt,
TRIV121_121_VSID,
0,
(PAGE_ALIGN((unsigned long)&_etext) - 0) >> PG_SHIFT,
(PAGE_ALIGN((unsigned long)_etext) - 0) >> PG_SHIFT,
0, /* WIMG */
TRIV121_PP_RO_PAGE);
if (TRIV121_MAP_SUCCESS != tmp) {
@@ -69,8 +69,8 @@ unsigned ldPtSize,tmp;
tmp = triv121PgTblMap(
pt,
TRIV121_121_VSID,
(unsigned long)&__DATA_START__,
(*pmemsize - (1<<ldPtSize) - (unsigned long)&__DATA_START__ )>> PG_SHIFT,
(unsigned long)__DATA_START__,
(*pmemsize - (1<<ldPtSize) - (unsigned long)__DATA_START__ )>> PG_SHIFT,
0, /* WIMG */
TRIV121_PP_RW_PAGE);
if (TRIV121_MAP_SUCCESS != tmp) {

6
c/src/lib/libbsp/powerpc/shared/vectors/vectors.h
View File

@@ -75,7 +75,11 @@
*/
extern void default_exception_vector_code_prolog();
extern int default_exception_vector_code_prolog_size;
/* This symbol is generated by the linker; prevent it from
* being accessed in one of the short data areas by declaring
* it as an array
*/
extern int default_exception_vector_code_prolog_size[];
/* codemove is like memmove, but it also gets the cache line size
* as 4th parameter to synchronize them. If this last parameter is

2
c/src/lib/libbsp/powerpc/shared/vectors/vectors_init.c
View File

@@ -160,7 +160,7 @@ void initialize_exceptions()
* Note that next line the '&' before default_exception_vector_code_prolog_size
* is not a bug as it is defined a .set directly in asm...
*/
exception_config.defaultRawEntry.hdl.raw_hdl_size = (unsigned) &default_exception_vector_code_prolog_size;
exception_config.defaultRawEntry.hdl.raw_hdl_size = (unsigned) default_exception_vector_code_prolog_size;
for (i=0; i <= exception_config.exceptSize; i++) {
if (!mpc60x_vector_is_valid (i)) {
continue;