Commit cd8fb8df authored by Robin Getz's avatar Robin Getz Committed by Bryan Wu
Browse files

Blackfin arch: Print out doublefault addresses, so debug can occur 



Signed-off-by: default avatarRobin Getz <rgetz@blackfin.uclinux.org>
Signed-off-by: default avatarBryan Wu <cooloney@kernel.org>
parent ee32664d

arch/blackfin/kernel/setup.c

+6 −1
Original line number Diff line number Diff line
@@ -52,6 +52,7 @@ EXPORT_SYMBOL(mtd_size); 
#endif



char __initdata command_line[COMMAND_LINE_SIZE];

unsigned int __initdata *__retx;



/* boot memmap, for parsing "memmap=" */

#define BFIN_MEMMAP_MAX		128 /* number of entries in bfin_memmap */
@@ -785,7 +786,11 @@ void __init setup_arch(char **cmdline_p) 
	bfin_write_SWRST(DOUBLE_FAULT);



	if (_bfin_swrst & RESET_DOUBLE)

		printk(KERN_INFO "Recovering from Double Fault event\n");

		/*

		 * don't decode the address, since you don't know if this

		 * kernel's symbol map is the same as the crashing kernel

		 */

		printk(KERN_INFO "Recovering from Double Fault event at %p\n", __retx);

	else if (_bfin_swrst & RESET_WDOG)

		printk(KERN_INFO "Recovering from Watchdog event\n");

	else if (_bfin_swrst & RESET_SOFTWARE)

arch/blackfin/mach-common/head.S

+6 −0
Original line number Diff line number Diff line
@@ -90,6 +90,12 @@ ENTRY(__start) 
	[p0] = R0;

	SSYNC;



	/* Save RETX, in case of doublefault */

	p0.l = ___retx;

	p0.h = ___retx;

	R0 = RETX;

	[P0] = R0;



	/* Let each Blackfin family do its own thing */

	call _mach_early_start;