diff options
Diffstat (limited to 'arch/xtensa')
| -rw-r--r-- | arch/xtensa/kernel/coprocessor.S | 64 | ||||
| -rw-r--r-- | arch/xtensa/mm/fault.c | 5 | ||||
| -rw-r--r-- | arch/xtensa/platforms/iss/console.c | 45 |
3 files changed, 44 insertions, 70 deletions
diff --git a/arch/xtensa/kernel/coprocessor.S b/arch/xtensa/kernel/coprocessor.S index c426b846beef..45cc0ae0af6f 100644 --- a/arch/xtensa/kernel/coprocessor.S +++ b/arch/xtensa/kernel/coprocessor.S @@ -100,37 +100,6 @@ LOAD_CP_REGS_TAB(7) /* - * coprocessor_flush(struct thread_info*, index) - * a2 a3 - * - * Save coprocessor registers for coprocessor 'index'. - * The register values are saved to or loaded from the coprocessor area - * inside the task_info structure. - * - * Note that this function doesn't update the coprocessor_owner information! - * - */ - -ENTRY(coprocessor_flush) - - /* reserve 4 bytes on stack to save a0 */ - abi_entry(4) - - s32i a0, a1, 0 - movi a0, .Lsave_cp_regs_jump_table - addx8 a3, a3, a0 - l32i a4, a3, 4 - l32i a3, a3, 0 - add a2, a2, a4 - beqz a3, 1f - callx0 a3 -1: l32i a0, a1, 0 - - abi_ret(4) - -ENDPROC(coprocessor_flush) - -/* * Entry condition: * * a0: trashed, original value saved on stack (PT_AREG0) @@ -245,6 +214,39 @@ ENTRY(fast_coprocessor) ENDPROC(fast_coprocessor) + .text + +/* + * coprocessor_flush(struct thread_info*, index) + * a2 a3 + * + * Save coprocessor registers for coprocessor 'index'. + * The register values are saved to or loaded from the coprocessor area + * inside the task_info structure. + * + * Note that this function doesn't update the coprocessor_owner information! + * + */ + +ENTRY(coprocessor_flush) + + /* reserve 4 bytes on stack to save a0 */ + abi_entry(4) + + s32i a0, a1, 0 + movi a0, .Lsave_cp_regs_jump_table + addx8 a3, a3, a0 + l32i a4, a3, 4 + l32i a3, a3, 0 + add a2, a2, a4 + beqz a3, 1f + callx0 a3 +1: l32i a0, a1, 0 + + abi_ret(4) + +ENDPROC(coprocessor_flush) + .data ENTRY(coprocessor_owner) diff --git a/arch/xtensa/mm/fault.c b/arch/xtensa/mm/fault.c index 7666408ce12a..95a74890c7e9 100644 --- a/arch/xtensa/mm/fault.c +++ b/arch/xtensa/mm/fault.c @@ -112,8 +112,11 @@ good_area: */ fault = handle_mm_fault(vma, address, flags, regs); - if (fault_signal_pending(fault, regs)) + if (fault_signal_pending(fault, regs)) { + if (!user_mode(regs)) + goto bad_page_fault; return; + } if (unlikely(fault & VM_FAULT_ERROR)) { if (fault & VM_FAULT_OOM) diff --git a/arch/xtensa/platforms/iss/console.c b/arch/xtensa/platforms/iss/console.c index af81a62faba6..a3dda25a4e45 100644 --- a/arch/xtensa/platforms/iss/console.c +++ b/arch/xtensa/platforms/iss/console.c @@ -31,48 +31,23 @@ #define SERIAL_MAX_NUM_LINES 1 #define SERIAL_TIMER_VALUE (HZ / 10) +static void rs_poll(struct timer_list *); + static struct tty_driver *serial_driver; static struct tty_port serial_port; -static struct timer_list serial_timer; - +static DEFINE_TIMER(serial_timer, rs_poll); static DEFINE_SPINLOCK(timer_lock); -static char *serial_version = "0.1"; -static char *serial_name = "ISS serial driver"; - -/* - * This routine is called whenever a serial port is opened. It - * enables interrupts for a serial port, linking in its async structure into - * the IRQ chain. It also performs the serial-specific - * initialization for the tty structure. - */ - -static void rs_poll(struct timer_list *); - static int rs_open(struct tty_struct *tty, struct file * filp) { - tty->port = &serial_port; spin_lock_bh(&timer_lock); - if (tty->count == 1) { - timer_setup(&serial_timer, rs_poll, 0); + if (tty->count == 1) mod_timer(&serial_timer, jiffies + SERIAL_TIMER_VALUE); - } spin_unlock_bh(&timer_lock); return 0; } - -/* - * ------------------------------------------------------------ - * iss_serial_close() - * - * This routine is called when the serial port gets closed. First, we - * wait for the last remaining data to be sent. Then, we unlink its - * async structure from the interrupt chain if necessary, and we free - * that IRQ if nothing is left in the chain. - * ------------------------------------------------------------ - */ static void rs_close(struct tty_struct *tty, struct file * filp) { spin_lock_bh(&timer_lock); @@ -149,7 +124,7 @@ static void rs_wait_until_sent(struct tty_struct *tty, int timeout) static int rs_proc_show(struct seq_file *m, void *v) { - seq_printf(m, "serinfo:1.0 driver:%s\n", serial_version); + seq_printf(m, "serinfo:1.0 driver:0.1\n"); return 0; } @@ -166,14 +141,12 @@ static const struct tty_operations serial_ops = { .proc_show = rs_proc_show, }; -int __init rs_init(void) +static int __init rs_init(void) { tty_port_init(&serial_port); serial_driver = alloc_tty_driver(SERIAL_MAX_NUM_LINES); - pr_info("%s %s\n", serial_name, serial_version); - /* Initialize the tty_driver structure */ serial_driver->driver_name = "iss_serial"; @@ -198,11 +171,7 @@ int __init rs_init(void) static __exit void rs_exit(void) { - int error; - - if ((error = tty_unregister_driver(serial_driver))) - pr_err("ISS_SERIAL: failed to unregister serial driver (%d)\n", - error); + tty_unregister_driver(serial_driver); put_tty_driver(serial_driver); tty_port_destroy(&serial_port); } |