lib: consolidate hang()

Delete all occurrences of hang() and provide a generic function.

Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
Acked-by: Albert ARIBAUD <albert.u.boot@aribaud.net>
[trini: Modify check around puts() in hang.c slightly]
Signed-off-by: Tom Rini <trini@ti.com>

20 files changed, 48 insertions, 150 deletions

diff --git a/arch/arm/cpu/arm926ejs/mxs/spl_boot.c b/arch/arm/cpu/arm926ejs/mxs/spl_boot.c
index 7e7044033e..ed525e58f3 100644
--- a/arch/arm/cpu/arm926ejs/mxs/spl_boot.c
+++ b/arch/arm/cpu/arm926ejs/mxs/spl_boot.c
@@ -148,10 +148,3 @@ inline void board_init_r(gd_t *id, ulong dest_addr)
 	for (;;)
 		;
 }
-
-void hang(void) __attribute__ ((noreturn));
-void hang(void)
-{
-	for (;;)
-		;
-}
diff --git a/arch/arm/cpu/arm926ejs/spear/spl.c b/arch/arm/cpu/arm926ejs/spear/spl.c
index 48e6efbc47..0101c5dd12 100644
--- a/arch/arm/cpu/arm926ejs/spear/spl.c
+++ b/arch/arm/cpu/arm926ejs/spear/spl.c
@@ -31,13 +31,6 @@
 #include <asm/arch/spr_misc.h>
 #include <asm/arch/spr_syscntl.h>
 
-inline void hang(void)
-{
-	serial_puts("### ERROR ### Please RESET the board ###\n");
-	for (;;)
-		;
-}
-
 static void ddr_clock_init(void)
 {
 	struct misc_regs *misc_p = (struct misc_regs *)CONFIG_SPEAR_MISCBASE;
diff --git a/arch/arm/lib/board.c b/arch/arm/lib/board.c
index 0521178ac3..09ab4ad736 100644
--- a/arch/arm/lib/board.c
+++ b/arch/arm/lib/board.c
@@ -706,9 +706,3 @@ void board_init_r(gd_t *id, ulong dest_addr)
 
 	/* NOTREACHED - no way out of command loop except booting */
 }
-
-void hang(void)
-{
-	puts("### ERROR ### Please RESET the board ###\n");
-	for (;;);
-}
diff --git a/arch/avr32/lib/board.c b/arch/avr32/lib/board.c
index 57e07dfb89..ccf862a7fb 100644
--- a/arch/avr32/lib/board.c
+++ b/arch/avr32/lib/board.c
@@ -120,11 +120,6 @@ static int display_banner (void)
 	return 0;
 }
 
-void hang(void)
-{
-	for (;;) ;
-}
-
 static int display_dram_config (void)
 {
 	int i;
diff --git a/arch/blackfin/lib/board.c b/arch/blackfin/lib/board.c
index 75b6c463d8..ccea3b9fb1 100644
--- a/arch/blackfin/lib/board.c
+++ b/arch/blackfin/lib/board.c
@@ -432,17 +432,3 @@ void board_init_r(gd_t * id, ulong dest_addr)
 	for (;;)
 		main_loop();
 }
-
-void hang(void)
-{
-#ifdef CONFIG_STATUS_LED
-	status_led_set(STATUS_LED_BOOT, STATUS_LED_OFF);
-	status_led_set(STATUS_LED_CRASH, STATUS_LED_BLINKING);
-#endif
-	puts("### ERROR ### Please RESET the board ###\n");
-	while (1)
-		/* If a JTAG emulator is hooked up, we'll automatically trigger
-		 * a breakpoint in it.  If one isn't, this is just a NOP.
-		 */
-		asm("emuexcpt;");
-}
diff --git a/arch/m68k/lib/board.c b/arch/m68k/lib/board.c
index adaccfe69e..b2e3068364 100644
--- a/arch/m68k/lib/board.c
+++ b/arch/m68k/lib/board.c
@@ -663,10 +663,3 @@ void board_init_r (gd_t *id, ulong dest_addr)
 
 	/* NOTREACHED - no way out of command loop except booting */
 }
-
-
-void hang(void)
-{
-	puts ("### ERROR ### Please RESET the board ###\n");
-	for (;;);
-}
diff --git a/arch/microblaze/lib/board.c b/arch/microblaze/lib/board.c
index 3a6d81aa09..bb402432c6 100644
--- a/arch/microblaze/lib/board.c
+++ b/arch/microblaze/lib/board.c
@@ -195,10 +195,3 @@ void board_init_f(ulong not_used)
 		main_loop();
 	}
 }
-
-void hang(void)
-{
-	puts("### ERROR ### Please RESET the board ###\n");
-	for (;;)
-		;
-}
diff --git a/arch/mips/lib/board.c b/arch/mips/lib/board.c
index f19f198ae9..fac791520e 100644
--- a/arch/mips/lib/board.c
+++ b/arch/mips/lib/board.c
@@ -344,10 +344,3 @@ void board_init_r(gd_t *id, ulong dest_addr)
 
 	/* NOTREACHED - no way out of command loop except booting */
 }
-
-void hang(void)
-{
-	puts("### ERROR ### Please RESET the board ###\n");
-	for (;;)
-		;
-}
diff --git a/arch/nds32/lib/board.c b/arch/nds32/lib/board.c
index a7d27fc7f8..57af1bee9b 100644
--- a/arch/nds32/lib/board.c
+++ b/arch/nds32/lib/board.c
@@ -404,10 +404,3 @@ void board_init_r(gd_t *id, ulong dest_addr)
 
 	/* NOTREACHED - no way out of command loop except booting */
 }
-
-void hang(void)
-{
-	puts("### ERROR ### Please RESET the board ###\n");
-	for (;;)
-		;
-}
diff --git a/arch/nios2/lib/board.c b/arch/nios2/lib/board.c
index 0f2bc7e8ae..f430ef082a 100644
--- a/arch/nios2/lib/board.c
+++ b/arch/nios2/lib/board.c
@@ -162,14 +162,3 @@ void board_init(void)
 		main_loop();
 	}
 }
-
-
-/***********************************************************************/
-
-void hang(void)
-{
-	disable_interrupts();
-	puts("### ERROR ### Please reset board ###\n");
-	for (;;)
-		;
-}
diff --git a/arch/openrisc/lib/board.c b/arch/openrisc/lib/board.c
index 85aa1899be..630e45fdb1 100644
--- a/arch/openrisc/lib/board.c
+++ b/arch/openrisc/lib/board.c
@@ -154,15 +154,3 @@ void board_init(void)
 		main_loop();
 	}
 }
-
-
-/***********************************************************************/
-
-void hang(void)
-{
-	disable_interrupts();
-	puts("### ERROR ### Please reset board ###\n");
-
-	for (;;)
-		;
-}
diff --git a/arch/powerpc/lib/board.c b/arch/powerpc/lib/board.c
index 422b4a39bb..41b22949ff 100644
--- a/arch/powerpc/lib/board.c
+++ b/arch/powerpc/lib/board.c
@@ -1050,15 +1050,6 @@ void board_init_r(gd_t *id, ulong dest_addr)
 	/* NOTREACHED - no way out of command loop except booting */
 }
 
-void hang(void)
-{
-	puts("### ERROR ### Please RESET the board ###\n");
-	bootstage_error(BOOTSTAGE_ID_NEED_RESET);
-	for (;;)
-		;
-}
-
-
 #if 0	/* We could use plain global data, but the resulting code is bigger */
 /*
  * Pointer to initial global data area
diff --git a/arch/sh/lib/board.c b/arch/sh/lib/board.c
index 6e43acfbd3..0789ed055d 100644
--- a/arch/sh/lib/board.c
+++ b/arch/sh/lib/board.c
@@ -200,12 +200,3 @@ void sh_generic_init(void)
 		main_loop();
 	}
 }
-
-/***********************************************************************/
-
-void hang(void)
-{
-	puts("Board ERROR\n");
-	for (;;)
-		;
-}
diff --git a/arch/sparc/lib/board.c b/arch/sparc/lib/board.c
index 79fb4c87ef..fbc535fa09 100644
--- a/arch/sparc/lib/board.c
+++ b/arch/sparc/lib/board.c
@@ -411,13 +411,4 @@ void board_init_f(ulong bootflag)
 
 }
 
-void hang(void)
-{
-	puts("### ERROR ### Please RESET the board ###\n");
-#ifdef CONFIG_SHOW_BOOT_PROGRESS
-	bootstage_error(BOOTSTAGE_ID_NEED_RESET);
-#endif
-	for (;;) ;
-}
-
 /************************************************************************/
diff --git a/arch/x86/lib/board.c b/arch/x86/lib/board.c
index f372898f61..228c2c8226 100644
--- a/arch/x86/lib/board.c
+++ b/arch/x86/lib/board.c
@@ -264,10 +264,3 @@ void board_init_r(gd_t *id, ulong dest_addr)
 
 	/* NOTREACHED - no way out of command loop except booting */
 }
-
-void hang(void)
-{
-	puts("### ERROR ### Please RESET the board ###\n");
-	for (;;)
-		;
-}
diff --git a/common/board_f.c b/common/board_f.c
index 3a6638f8ee..32e59faa02 100644
--- a/common/board_f.c
+++ b/common/board_f.c
@@ -1087,13 +1087,3 @@ void board_init_f_r(void)
 	hang();
 }
 #endif /* CONFIG_X86 */
-
-void hang(void)
-{
-	puts("### ERROR ### Please RESET the board ###\n");
-#ifdef CONFIG_SANDBOX
-	os_exit(0);
-#else
-	for (;;);
-#endif
-}
diff --git a/common/spl/spl.c b/common/spl/spl.c
index 6715e0d203..7ce2d5f214 100644
--- a/common/spl/spl.c
+++ b/common/spl/spl.c
@@ -48,13 +48,6 @@ struct spl_image_info spl_image;
 /* Define board data structure */
 static bd_t bdata __attribute__ ((section(".data")));
 
-inline void hang(void)
-{
-	puts("### ERROR ### Please RESET the board ###\n");
-	for (;;)
-		;
-}
-
 /*
  * Default function to determine if u-boot or the OS should
  * be started. This implementation always returns 1.
diff --git a/drivers/mtd/nand/mxc_nand_spl.c b/drivers/mtd/nand/mxc_nand_spl.c
index 09f23c30c4..edc589e5b7 100644
--- a/drivers/mtd/nand/mxc_nand_spl.c
+++ b/drivers/mtd/nand/mxc_nand_spl.c
@@ -355,12 +355,3 @@ void nand_boot(void)
 		hang();
 	}
 }
-
-/*
- * Called in case of an exception.
- */
-void hang(void)
-{
-	/* Loop forever */
-	while (1) ;
-}
diff --git a/lib/Makefile b/lib/Makefile
index a3131d873f..8f81862b72 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -71,6 +71,7 @@ COBJS-$(CONFIG_BCH) += bch.o
 COBJS-y += crc32.o
 COBJS-y += ctype.o
 COBJS-y += div64.o
+COBJS-y += hang.o
 COBJS-y += linux_string.o
 COBJS-$(CONFIG_REGEX) += slre.o
 COBJS-y += string.o
diff --git a/lib/hang.c b/lib/hang.c
new file mode 100644
index 0000000000..fc1286c0b7
--- /dev/null
+++ b/lib/hang.c
@@ -0,0 +1,47 @@
+/*
+ * (C) Copyright 2013
+ * Andreas Bießmann <andreas.devel@googlemail.com>
+ *
+ * This file consolidates all the different hang() functions implemented in
+ * u-boot.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <bootstage.h>
+
+/**
+ * hang - stop processing by staying in an endless loop
+ *
+ * The purpose of this function is to stop further execution of code cause
+ * something went completely wrong.  To catch this and give some feedback to
+ * the user one needs to catch the bootstage_error (see show_boot_progress())
+ * in the board code.
+ */
+void hang(void)
+{
+#if !defined(CONFIG_SPL_BUILD) || (defined(CONFIG_SPL_LIBCOMMON_SUPPORT) && \
+		defined(CONFIG_SPL_SERIAL_SUPPORT))
+	puts("### ERROR ### Please RESET the board ###\n");
+#endif
+	bootstage_error(BOOTSTAGE_ID_NEED_RESET);
+	for (;;)
+		;
+}