The Sparc port appears to use no generic hardware capability for performing a CPU reset. Since all of the supported boards use the exact same code to perform a jump-to-flash it goes into __arch_restart().
This means that Sparc has a no-op __arch_emergency_restart() function. If the CPU is in an invalid state then jump-to-FLASH probably won't work.
Signed-off-by: Kyle Moffett Kyle.D.Moffett@boeing.com Cc: Daniel Hellstrom daniel@gaisler.com --- arch/sparc/lib/board.c | 12 +++++++++++- 1 files changed, 11 insertions(+), 1 deletions(-)
diff --git a/arch/sparc/lib/board.c b/arch/sparc/lib/board.c index 128ece7..e250274 100644 --- a/arch/sparc/lib/board.c +++ b/arch/sparc/lib/board.c @@ -445,7 +445,7 @@ void hang(void) for (;;) ; }
-int do_reset(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) +int __arch_restart(void) { /* Interrupts off */ disable_interrupts(); @@ -456,4 +456,14 @@ int do_reset(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[]) return 1; }
+/* + * The __arch_restart() just jumps back to flash, which isn't safe to do in + * emergency conditions. Since we don't have anything better to do, just + * fall through into the default hang(). + */ +void __arch_emergency_restart(void) +{ + return; +} + /************************************************************************/