| /* |
| * Each architecture must implement puts() and exit(). |
| * |
| * Copyright (C) 2016, Red Hat Inc, Andrew Jones <drjones@redhat.com> |
| * |
| * This work is licensed under the terms of the GNU LGPL, version 2. |
| */ |
| #include <libcflat.h> |
| #include <asm/spinlock.h> |
| #include <asm/rtas.h> |
| #include <asm/setup.h> |
| #include <asm/processor.h> |
| #include <asm/atomic.h> |
| #include "io.h" |
| |
| static struct spinlock print_lock; |
| |
| void putchar(int c) |
| { |
| if (machine_is_powernv()) |
| opal_putchar(c); |
| else |
| papr_putchar(c); |
| } |
| |
| int __getchar(void) |
| { |
| if (machine_is_powernv()) |
| return __opal_getchar(); |
| else |
| return __papr_getchar(); |
| } |
| |
| void io_init(void) |
| { |
| if (machine_is_powernv()) |
| assert(!opal_init()); |
| else |
| rtas_init(); |
| } |
| |
| void puts(const char *s) |
| { |
| spin_lock(&print_lock); |
| while (*s) |
| putchar(*s++); |
| spin_unlock(&print_lock); |
| } |
| |
| /* |
| * Defining halt to take 'code' as an argument guarantees that it will |
| * be in r3 when we halt. That gives us a final chance to see the exit |
| * status while inspecting the halted unit test state. |
| */ |
| extern void halt(int code); |
| |
| void exit(int code) |
| { |
| static int exited = 0; |
| |
| // FIXME: change this print-exit/rtas-poweroff to chr_testdev_exit(), |
| // maybe by plugging chr-testdev into a spapr-vty. |
| if (atomic_fetch_inc(&exited) == 0) { |
| printf("\nEXIT: STATUS=%d\n", ((code) << 1) | 1); |
| if (machine_is_powernv()) |
| opal_power_off(); |
| else |
| rtas_power_off(); |
| } |
| halt(code); |
| __builtin_unreachable(); |
| } |