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/*
* 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/thread_info.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
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