Blackfin arch: unify the duplicated _real_start functions

Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>

7 files changed, 77 insertions, 354 deletions

diff --git a/arch/blackfin/mach-bf527/head.S b/arch/blackfin/mach-bf527/head.S
index a16a26575280..180d3c85a4c1 100644
--- a/arch/blackfin/mach-bf527/head.S
+++ b/arch/blackfin/mach-bf527/head.S
@@ -226,76 +226,6 @@ ENTRY(__start)
 	jump .LWAIT_HERE;
 ENDPROC(__start)
 
-ENTRY(_real_start)
-	[ -- sp ] = reti;
-	p0.l = lo(WDOG_CTL);
-	p0.h = hi(WDOG_CTL);
-	r0 = 0xAD6(z);
-	w[p0] = r0;	/* watchdog off for now */
-	ssync;
-
-	/* Code update for BSS size == 0
-	 * Zero out the bss region.
-	 */
-
-	p1.l = ___bss_start;
-	p1.h = ___bss_start;
-	p2.l = ___bss_stop;
-	p2.h = ___bss_stop;
-	r0 = 0;
-	p2 -= p1;
-	lsetup (.L_clear_bss, .L_clear_bss) lc0 = p2;
-.L_clear_bss:
-	B[p1++] = r0;
-
-	/* In case there is a NULL pointer reference
-	 * Zero out region before stext
-	 */
-
-	p1.l = 0x0;
-	p1.h = 0x0;
-	r0.l = __stext;
-	r0.h = __stext;
-	r0 = r0 >> 1;
-	p2 = r0;
-	r0 = 0;
-	lsetup (.L_clear_zero, .L_clear_zero) lc0 = p2;
-.L_clear_zero:
-	W[p1++] = r0;
-
-	/* pass the uboot arguments to the global value command line */
-	R0 = R7;
-	call _cmdline_init;
-
-	p1.l = __rambase;
-	p1.h = __rambase;
-	r0.l = __sdata;
-	r0.h = __sdata;
-	[p1] = r0;
-
-	p1.l = __ramstart;
-	p1.h = __ramstart;
-	p3.l = ___bss_stop;
-	p3.h = ___bss_stop;
-
-	r1 = p3;
-	[p1] = r1;
-
-	/*
-	 * load the current thread pointer and stack
-	 */
-	r1.l = _init_thread_union;
-	r1.h = _init_thread_union;
-
-	r2.l = 0x2000;
-	r2.h = 0x0000;
-	r1 = r1 + r2;
-	sp = r1;
-	usp = sp;
-	fp = sp;
-	jump.l _start_kernel;
-ENDPROC(_real_start)
-
 __FINIT
 
 .section .l1.text
diff --git a/arch/blackfin/mach-bf533/head.S b/arch/blackfin/mach-bf533/head.S
index fb49169c0e7b..0ffbe7a205ba 100644
--- a/arch/blackfin/mach-bf533/head.S
+++ b/arch/blackfin/mach-bf533/head.S
@@ -228,76 +228,6 @@ ENTRY(__start)
 	jump .LWAIT_HERE;
 ENDPROC(__start)
 
-ENTRY(_real_start)
-	[ -- sp ] = reti;
-	p0.l = lo(WDOG_CTL);
-	p0.h = hi(WDOG_CTL);
-	r0 = 0xAD6(z);
-	w[p0] = r0;	/* watchdog off for now */
-	ssync;
-
-	/* Code update for BSS size == 0
-	 * Zero out the bss region.
-	 */
-
-	p1.l = ___bss_start;
-	p1.h = ___bss_start;
-	p2.l = ___bss_stop;
-	p2.h = ___bss_stop;
-	r0 = 0;
-	p2 -= p1;
-	lsetup (.L_clear_bss, .L_clear_bss) lc0 = p2;
-.L_clear_bss:
-	B[p1++] = r0;
-
-	/* In case there is a NULL pointer reference
-	 * Zero out region before stext
-	 */
-
-	p1.l = 0x0;
-	p1.h = 0x0;
-	r0.l = __stext;
-	r0.h = __stext;
-	r0 = r0 >> 1;
-	p2 = r0;
-	r0 = 0;
-	lsetup (.L_clear_zero, .L_clear_zero) lc0 = p2;
-.L_clear_zero:
-	W[p1++] = r0;
-
-	/* pass the uboot arguments to the global value command line */
-	R0 = R7;
-	call _cmdline_init;
-
-	p1.l = __rambase;
-	p1.h = __rambase;
-	r0.l = __sdata;
-	r0.h = __sdata;
-	[p1] = r0;
-
-	p1.l = __ramstart;
-	p1.h = __ramstart;
-	p3.l = ___bss_stop;
-	p3.h = ___bss_stop;
-
-	r1 = p3;
-	[p1] = r1;
-
-	/*
-	 * load the current thread pointer and stack
-	 */
-	r1.l = _init_thread_union;
-	r1.h = _init_thread_union;
-
-	r2.l = 0x2000;
-	r2.h = 0x0000;
-	r1 = r1 + r2;
-	sp = r1;
-	usp = sp;
-	fp = sp;
-	jump.l _start_kernel;
-ENDPROC(_real_start)
-
 __FINIT
 
 .section .l1.text
diff --git a/arch/blackfin/mach-bf537/head.S b/arch/blackfin/mach-bf537/head.S
index 5bc89bbb89d0..c11f0fd82255 100644
--- a/arch/blackfin/mach-bf537/head.S
+++ b/arch/blackfin/mach-bf537/head.S
@@ -240,76 +240,6 @@ ENTRY(__start)
 	jump .LWAIT_HERE;
 ENDPROC(__start)
 
-ENTRY(_real_start)
-	[ -- sp ] = reti;
-	p0.l = lo(WDOG_CTL);
-	p0.h = hi(WDOG_CTL);
-	r0 = 0xAD6(z);
-	w[p0] = r0;	/* watchdog off for now */
-	ssync;
-
-	/* Code update for BSS size == 0
-	 * Zero out the bss region.
-	 */
-
-	p1.l = ___bss_start;
-	p1.h = ___bss_start;
-	p2.l = ___bss_stop;
-	p2.h = ___bss_stop;
-	r0 = 0;
-	p2 -= p1;
-	lsetup (.L_clear_bss, .L_clear_bss) lc0 = p2;
-.L_clear_bss:
-	B[p1++] = r0;
-
-	/* In case there is a NULL pointer reference
-	 * Zero out region before stext
-	 */
-
-	p1.l = 0x0;
-	p1.h = 0x0;
-	r0.l = __stext;
-	r0.h = __stext;
-	r0 = r0 >> 1;
-	p2 = r0;
-	r0 = 0;
-	lsetup (.L_clear_zero, .L_clear_zero) lc0 = p2;
-.L_clear_zero:
-	W[p1++] = r0;
-
-	/* pass the uboot arguments to the global value command line */
-	R0 = R7;
-	call _cmdline_init;
-
-	p1.l = __rambase;
-	p1.h = __rambase;
-	r0.l = __sdata;
-	r0.h = __sdata;
-	[p1] = r0;
-
-	p1.l = __ramstart;
-	p1.h = __ramstart;
-	p3.l = ___bss_stop;
-	p3.h = ___bss_stop;
-
-	r1 = p3;
-	[p1] = r1;
-
-	/*
-	 * load the current thread pointer and stack
-	 */
-	r1.l = _init_thread_union;
-	r1.h = _init_thread_union;
-
-	r2.l = 0x2000;
-	r2.h = 0x0000;
-	r1 = r1 + r2;
-	sp = r1;
-	usp = sp;
-	fp = sp;
-	jump.l _start_kernel;
-ENDPROC(_real_start)
-
 __FINIT
 
 .section .l1.text
diff --git a/arch/blackfin/mach-bf548/head.S b/arch/blackfin/mach-bf548/head.S
index 06b9178cfcfe..96fbdb790a98 100644
--- a/arch/blackfin/mach-bf548/head.S
+++ b/arch/blackfin/mach-bf548/head.S
@@ -212,79 +212,6 @@ ENTRY(__start)
 	jump .LWAIT_HERE;
 ENDPROC(__start)
 
-ENTRY(_real_start)
-	[ -- sp ] = reti;
-	p0.l = lo(WDOG_CTL);
-	p0.h = hi(WDOG_CTL);
-	r0 = 0xAD6(z);
-	w[p0] = r0;	/* watchdog off for now */
-	ssync;
-
-	/* Code update for BSS size == 0
-	 * Zero out the bss region.
-	 */
-
-	p1.l = ___bss_start;
-	p1.h = ___bss_start;
-	p2.l = ___bss_stop;
-	p2.h = ___bss_stop;
-	r0 = 0;
-	p2 -= p1;
-	lsetup (.L_clear_bss, .L_clear_bss ) lc0 = p2;
-.L_clear_bss:
-	B[p1++] = r0;
-
-	/* In case there is a NULL pointer reference
-	 * Zero out region before stext
-	 */
-
-	p1.l = 0x0;
-	p1.h = 0x0;
-	r0.l = __stext;
-	r0.h = __stext;
-	r0 = r0 >> 1;
-	p2 = r0;
-	r0 = 0;
-	lsetup (.L_clear_zero, .L_clear_zero ) lc0 = p2;
-.L_clear_zero:
-	W[p1++] = r0;
-
-	/* pass the uboot arguments to the global value command line */
-	R0 = R7;
-	call _cmdline_init;
-
-	p1.l = __rambase;
-	p1.h = __rambase;
-	r0.l = __sdata;
-	r0.h = __sdata;
-	[p1] = r0;
-
-	p1.l = __ramstart;
-	p1.h = __ramstart;
-	p3.l = ___bss_stop;
-	p3.h = ___bss_stop;
-
-	r1 = p3;
-	[p1] = r1;
-
-
-	/*
-	 *  load the current thread pointer and stack
-	 */
-	r1.l = _init_thread_union;
-	r1.h = _init_thread_union;
-
-	r2.l = 0x2000;
-	r2.h = 0x0000;
-	r1 = r1 + r2;
-	sp = r1;
-	usp = sp;
-	fp = sp;
-	call _start_kernel;
-.L_exit:
-	jump.s	.L_exit;
-ENDPROC(_real_start)
-
 __FINIT
 
 .section .l1.text
diff --git a/arch/blackfin/mach-bf561/head.S b/arch/blackfin/mach-bf561/head.S
index 0a1443b6b462..553b2d149d71 100644
--- a/arch/blackfin/mach-bf561/head.S
+++ b/arch/blackfin/mach-bf561/head.S
@@ -217,76 +217,6 @@ ENTRY(__start)
 	jump .LWAIT_HERE;
 ENDPROC(__start)
 
-ENTRY(_real_start)
-	[ -- sp ] = reti;
-	p0.l = lo(WDOGA_CTL);
-	p0.h = hi(WDOGA_CTL);
-	r0 = 0xAD6(z);
-	w[p0] = r0;	/* watchdog off for now */
-	ssync;
-
-	/* Code update for BSS size == 0
-	 * Zero out the bss region.
-	 */
-
-	p1.l = ___bss_start;
-	p1.h = ___bss_start;
-	p2.l = ___bss_stop;
-	p2.h = ___bss_stop;
-	r0 = 0;
-	p2 -= p1;
-	lsetup (.L_clear_bss, .L_clear_bss) lc0 = p2;
-.L_clear_bss:
-	B[p1++] = r0;
-
-	/* In case there is a NULL pointer reference
-	 * Zero out region before stext
-	 */
-
-	p1.l = 0x0;
-	p1.h = 0x0;
-	r0.l = __stext;
-	r0.h = __stext;
-	r0 = r0 >> 1;
-	p2 = r0;
-	r0 = 0;
-	lsetup (.L_clear_zero, .L_clear_zero) lc0 = p2;
-.L_clear_zero:
-	W[p1++] = r0;
-
-	/* pass the uboot arguments to the global value command line */
-	R0 = R7;
-	call _cmdline_init;
-
-	p1.l = __rambase;
-	p1.h = __rambase;
-	r0.l = __sdata;
-	r0.h = __sdata;
-	[p1] = r0;
-
-	p1.l = __ramstart;
-	p1.h = __ramstart;
-	p3.l = ___bss_stop;
-	p3.h = ___bss_stop;
-
-	r1 = p3;
-	[p1] = r1;
-
-	/*
-	 * load the current thread pointer and stack
-	 */
-	r1.l = _init_thread_union;
-	r1.h = _init_thread_union;
-
-	r2.l = 0x2000;
-	r2.h = 0x0000;
-	r1 = r1 + r2;
-	sp = r1;
-	usp = sp;
-	fp = sp;
-	jump.l _start_kernel;
-ENDPROC(_real_start)
-
 __FINIT
 
 .section .l1.text
diff --git a/arch/blackfin/mach-common/Makefile b/arch/blackfin/mach-common/Makefile
index 5e6b20e423d6..862cd73c9504 100644
--- a/arch/blackfin/mach-common/Makefile
+++ b/arch/blackfin/mach-common/Makefile
@@ -3,7 +3,7 @@
 #
 
 obj-y := \
-	cache.o entry.o \
+	cache.o entry.o head.o \
 	interrupt.o lock.o irqpanic.o arch_checks.o ints-priority.o
 
 obj-$(CONFIG_PM)          += pm.o dpmc_modes.o
diff --git a/arch/blackfin/mach-common/head.S b/arch/blackfin/mach-common/head.S
new file mode 100644
index 000000000000..8514da587557
--- /dev/null
+++ b/arch/blackfin/mach-common/head.S
@@ -0,0 +1,76 @@
+/*
+ * Common Blackfin startup code
+ *
+ * Copyright 2004-2008 Analog Devices Inc.
+ *
+ * Enter bugs at http://blackfin.uclinux.org/
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/linkage.h>
+#include <linux/init.h>
+#include <asm/blackfin.h>
+#include <asm/trace.h>
+
+/* A little BF561 glue ... */
+#ifndef WDOG_CTL
+# define WDOG_CTL WDOGA_CTL
+#endif
+
+__INIT
+
+ENTRY(_real_start)
+	/* Enable nested interrupts */
+	[--sp] = reti;
+
+	/* watchdog off for now */
+	p0.l = lo(WDOG_CTL);
+	p0.h = hi(WDOG_CTL);
+	r0 = 0xAD6(z);
+	w[p0] = r0;
+	ssync;
+
+	/* Zero out the bss region
+	 * Note: this will fail if bss is 0 bytes ...
+	 */
+	r0 = 0 (z);
+	r1.l = ___bss_start;
+	r1.h = ___bss_start;
+	r2.l = ___bss_stop;
+	r2.h = ___bss_stop;
+	r2 = r2 - r1;
+	r2 >>= 2;
+	p1 = r1;
+	p2 = r2;
+	lsetup (.L_clear_bss, .L_clear_bss) lc0 = p2;
+.L_clear_bss:
+	[p1++] = r0;
+
+	/* In case there is a NULL pointer reference,
+	 * zero out region before stext
+	 */
+	p1 = r0;
+	r2.l = __stext;
+	r2.h = __stext;
+	r2 >>= 2;
+	p2 = r2;
+	lsetup (.L_clear_zero, .L_clear_zero) lc0 = p2;
+.L_clear_zero:
+	[p1++] = r0;
+
+	/* Pass the u-boot arguments to the global value command line */
+	R0 = R7;
+	call _cmdline_init;
+
+	/* Load the current thread pointer and stack */
+	sp.l = _init_thread_union;
+	sp.h = _init_thread_union;
+	p1 = THREAD_SIZE (z);
+	sp = sp + p1;
+	usp = sp;
+	fp = sp;
+	jump.l _start_kernel;
+ENDPROC(_real_start)
+
+__FINIT