sparc: Update PROM initialization code for generic board

Fixed the prom_relocate() function in start.S file by reserving memory in
the board_init_f sequence and saving the offset to the __prom_start_reloc
variable. This value is used as the destination when relocating the PROM.

Add the prom_init() function to the end of the board_init_r sequence.

Signed-off-by: Francois Retief <fgretief@spaceteq.co.za>

4 files changed, 32 insertions, 28 deletions

diff --git a/arch/sparc/cpu/leon2/prom.c b/arch/sparc/cpu/leon2/prom.c
index cd2571f..7829e7a 100644
--- a/arch/sparc/cpu/leon2/prom.c
+++ b/arch/sparc/cpu/leon2/prom.c
@@ -25,6 +25,8 @@ extern struct linux_romvec *kernel_arg_promvec;
 #define PROM_TEXT __attribute__ ((__section__ (".prom.text")))
 #define PROM_DATA __attribute__ ((__section__ (".prom.data")))
 
+void *__prom_start_reloc; /* relocated prom_start address */
+
 /* for __va */
 extern int __prom_start;
 #define PAGE_OFFSET 0xf0000000
diff --git a/arch/sparc/cpu/leon2/start.S b/arch/sparc/cpu/leon2/start.S
index 7362ae1..1b404da 100644
--- a/arch/sparc/cpu/leon2/start.S
+++ b/arch/sparc/cpu/leon2/start.S
@@ -414,24 +414,24 @@ fixup_got:
 	bcs	30b			! while (ptr < end)
 	 nop
 
-#if 0 /* FIXME: Relocated PROM address should be calculated! */
-
 prom_relocate:
 	SPARC_LOAD_ADDRESS(__prom_start, l7, g2)
 	SPARC_LOAD_ADDRESS(__prom_end, l7, g3)
-	set	CONFIG_SYS_PROM_OFFSET, %g4
-
-prom_relocate_loop:
-	ldd	[%g2],%l0
-	ldd	[%g2+8],%l2
-	std	%l0,[%g4]
-	std	%l2,[%g4+8]
-	inc	16,%g2
-	subcc	%g3,%g2,%g0
-	bne	prom_relocate_loop
-	 inc	16,%g4
+	/*
+	 * Calculated addres is stored in this variable by
+	 * reserve_prom() function in common/board_f.c
+	 */
+	SPARC_LOAD_ADDRESS(__prom_start_reloc, l7, g4)
+	ld	[%g4], %g4
 
-#endif
+40:	ldd	[%g2], %l0
+	ldd	[%g2+8], %l2
+	std	%l0, [%g4]
+	std	%l2, [%g4+8]
+	inc	16, %g2
+	cmp	%g2, %g3
+	bcs	40b
+	 inc	16, %g4
 
 ! %o0 = stack pointer (relocated)
 ! %o1 = global data pointer (relocated)
diff --git a/arch/sparc/cpu/leon3/prom.c b/arch/sparc/cpu/leon3/prom.c
index c391be7..1f185b7 100644
--- a/arch/sparc/cpu/leon3/prom.c
+++ b/arch/sparc/cpu/leon3/prom.c
@@ -33,6 +33,8 @@ DECLARE_GLOBAL_DATA_PTR;
 
 ambapp_dev_gptimer *gptimer;
 
+void *__prom_start_reloc; /* relocated prom_start address */
+
 /* for __va */
 extern int __prom_start;
 #define PAGE_OFFSET 0xf0000000
diff --git a/arch/sparc/cpu/leon3/start.S b/arch/sparc/cpu/leon3/start.S
index 52e82b5..1527d72 100644
--- a/arch/sparc/cpu/leon3/start.S
+++ b/arch/sparc/cpu/leon3/start.S
@@ -397,24 +397,24 @@ fixup_got:
 	bcs	30b			! while (ptr < end)
 	 nop
 
-#if 0 /* FIXME: Relocated PROM address should be calculated! */
-
 prom_relocate:
 	SPARC_LOAD_ADDRESS(__prom_start, l7, g2)
 	SPARC_LOAD_ADDRESS(__prom_end, l7, g3)
-	set	CONFIG_SYS_PROM_OFFSET, %g4
-
-prom_relocate_loop:
-	ldd	[%g2],%l0
-	ldd	[%g2+8],%l2
-	std	%l0,[%g4]
-	std	%l2,[%g4+8]
-	inc	16,%g2
-	subcc	%g3,%g2,%g0
-	bne	prom_relocate_loop
-	 inc	16,%g4
+	/*
+	 * Calculated addres is stored in this variable by
+	 * reserve_prom() function in common/board_f.c
+	 */
+	SPARC_LOAD_ADDRESS(__prom_start_reloc, l7, g4)
+	ld	[%g4], %g4
 
-#endif
+40:	ldd	[%g2], %l0
+	ldd	[%g2+8], %l2
+	std	%l0, [%g4]
+	std	%l2, [%g4+8]
+	inc	16, %g2
+	cmp	%g2, %g3
+	bcs	40b
+	 inc	16, %g4
 
 ! %o0 = stack pointer (relocated)
 ! %o1 = global data pointer (relocated)