From 0091a875f1a35c9fd58c2fc85f119802c7832f3f Mon Sep 17 00:00:00 2001
From: Ralf Corsepius <ralf.corsepius@rtems.org>
Date: Mon, 9 Jan 2006 10:52:50 +0000
Subject: Backport from rtems-4-6-branch

---
 c/src/lib/libbsp/sparc/shared/start.S | 65 +++++++++++++++++++++++++++++++----
 1 file changed, 58 insertions(+), 7 deletions(-)

(limited to 'c/src/lib/libbsp/sparc')

diff --git a/c/src/lib/libbsp/sparc/shared/start.S b/c/src/lib/libbsp/sparc/shared/start.S
index 21c0ae5d7b..9b2bbb42fc 100644
--- a/c/src/lib/libbsp/sparc/shared/start.S
+++ b/c/src/lib/libbsp/sparc/shared/start.S
@@ -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:
-- 
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