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Backport from rtems-4-6-branch

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This commit is contained in:
Ralf Corsepius
2006-01-09 10:52:50 +00:00
parent ca8892bb3d
commit 0091a875f1
1 changed files with 58 additions and 7 deletions
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65
c/src/lib/libbsp/sparc/shared/start.S
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@@ -47,8 +47,8 @@ start:
PUBLIC(trap_table)
SYM(trap_table):
RTRAP( 0, SYM(hard_reset) ); ! 00 reset trap
BAD_TRAP; ! 01 instruction access
RTRAP( 0, SYM(hard_reset) ); ! 00 reset trap
BAD_TRAP; ! 01 instruction access
! exception
BAD_TRAP; ! 02 illegal instruction
BAD_TRAP; ! 03 privileged instruction
@@ -213,9 +213,6 @@ SYM(hard_reset):
nop
nop
call __bsp_board_init
nop
set (SYM(rdb_start)), %g6 ! End of work-space area
st %sp, [%g6]
set (SYM(Configuration)), %l1
@@ -226,7 +223,62 @@ SYM(hard_reset):
mov %sp, %fp ! Set frame pointer
nop
#if 0
#if ENABLE_SIS_QUIRKS==1
#include <erc32.h>
/* Check if MEC is initialised. If not, this means that we are
running on the simulator. Initiate some of the parameters
that are done by the boot-prom otherwise.
*/
set SYM(ERC32_MEC), %g3 ! g3 = base address of peripherals
ld [%g3], %g2
set 0xfe080000, %g1
andcc %g1, %g2, %g0
bne 2f
/* Set the correct memory size in MEC memory config register */
set SYM(PROM_SIZE), %l0
set 0, %l1
srl %l0, 18, %l0
1:
tst %l0
srl %l0, 1, %l0
bne,a 1b
inc %l1
sll %l1, 8, %l1
set SYM(RAM_SIZE), %l0
srl %l0, 19, %l0
1:
tst %l0
srl %l0, 1, %l0
bne,a 1b
inc %l1
sll %l1, 10, %l1
! set the Memory Configuration
st %l1, [ %g3 + ERC32_MEC_MEMORY_CONFIGURATION_OFFSET ]
!DISABLE THE HARDWARE WATCHDOG
st %g0, [ %g3 + ERC32_MEC_WATCHDOG_TRAP_DOOR_SET_OFFSET ]
!Reduce the number of wait states to 0 for all memory areas.
st %g0, [ %g3 + ERC32_MEC_WAIT_STATE_CONFIGURATION_OFFSET ]
set SYM(RAM_START), %l1 ! Cannot use RAM_END due to bug in linker
set SYM(RAM_SIZE), %l2
add %l1, %l2, %sp
st %sp, [%g6]
set SYM(CLOCK_SPEED), %g6 ! Use 14 MHz in simulator
set 14, %g1
st %g1, [%g6]
2:
#endif
/*
* Copy the initialized data to RAM
*
@@ -256,7 +308,6 @@ copy_data:
cmp %g3, %g4 ! Is the pointer past the end of dest?
bl copy_data
nop
#endif
/* clear the bss */
1: