The Nios-II 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 Nios-II 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: Scott McNutt smcnutt@psyent.com --- arch/nios2/cpu/cpu.c | 12 +++++++++++- 1 files changed, 11 insertions(+), 1 deletions(-)
diff --git a/arch/nios2/cpu/cpu.c b/arch/nios2/cpu/cpu.c index ef360ee..9f40188 100644 --- a/arch/nios2/cpu/cpu.c +++ b/arch/nios2/cpu/cpu.c @@ -40,10 +40,20 @@ int checkcpu (void) return (0); }
-int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +int __arch_restart(void) { disable_interrupts(); /* indirect call to go beyond 256MB limitation of toolchain */ nios2_callr(CONFIG_SYS_RESET_ADDR); return 0; } + +/* + * 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; +}