X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=arch%2Farc%2Flib%2Fstart.S;h=3fb05606c7b6b6161454cc31d7d78a4f5c7f2110;hb=83d290c56fab2d38cd1ab4c4cc7099559c1d5046;hp=26a593418938da72e3dcc43ec77ed45d43262d9a;hpb=ef639e6f7076c19959f40f367cead5108d099592;p=platform%2Fkernel%2Fu-boot.git

diff --git a/arch/arc/lib/start.S b/arch/arc/lib/start.S
index 26a5934..3fb0560 100644
--- a/arch/arc/lib/start.S
+++ b/arch/arc/lib/start.S
@@ -1,7 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved.
- *
- * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <asm-offsets.h>
@@ -24,6 +23,14 @@ ENTRY(_start)
 #endif
 	sr	r5, [ARC_AUX_IC_CTRL]
 
+	mov	r5, 1
+	sr	r5, [ARC_AUX_IC_IVIC]
+	; As per ARC HS databook (see chapter 5.3.3.2)
+	; it is required to add 3 NOPs after each write to IC_IVIC.
+	nop
+	nop
+	nop
+
 1:
 	; Disable/enable D-cache according to configuration
 	lr	r5, [ARC_BCR_DC_BUILD]
@@ -37,6 +44,10 @@ ENTRY(_start)
 #endif
 	sr	r5, [ARC_AUX_DC_CTRL]
 
+	mov	r5, 1
+	sr	r5, [ARC_AUX_DC_IVDC]
+
+
 1:
 #ifdef CONFIG_ISA_ARCV2
 	; Disable System-Level Cache (SLC)
@@ -50,21 +61,29 @@ ENTRY(_start)
 1:
 #endif
 
-	/* Setup stack- and frame-pointers */
+	/* Establish C runtime stack and frame */
 	mov	%sp, CONFIG_SYS_INIT_SP_ADDR
 	mov	%fp, %sp
 
-	/* Allocate and zero GD, update SP */
+	/* Allocate reserved area from current top of stack */
 	mov	%r0, %sp
-	bl	board_init_f_mem
-
-	/* Update stack- and frame-pointers */
+	bl	board_init_f_alloc_reserve
+	/* Set stack below reserved area, adjust frame pointer accordingly */
 	mov	%sp, %r0
 	mov	%fp, %sp
 
+	/* Initialize reserved area - note: r0 already contains address */
+	bl	board_init_f_init_reserve
+
 	/* Zero the one and only argument of "board_init_f" */
 	mov_s	%r0, 0
-	j	board_init_f
+	bl	board_init_f
+
+	/* We only get here if relocation is disabled by GD_FLG_SKIP_RELOC */
+	/* Make sure we don't lose GD overwritten by zero new GD */
+	mov	%r0, %r25
+	mov	%r1, 0
+	bl	board_init_r
 ENDPROC(_start)
 
 /*