diff options
| -rw-r--r-- | arch/arm64/kernel/early_printk.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm64/kernel/early_printk.c b/arch/arm64/kernel/early_printk.c index 7e320a2edb9b..0bb7436c57dc 100644 --- a/arch/arm64/kernel/early_printk.c +++ b/arch/arm64/kernel/early_printk.c @@ -40,6 +40,17 @@ static void pl011_printch(char ch) ; } +/* + * Semihosting-based debug console + */ +static void smh_printch(char ch) +{ + asm volatile("mov x1, %0\n" + "mov x0, #3\n" + "hlt 0xf000\n" + : : "r" (&ch) : "x0", "x1", "memory"); +} + struct earlycon_match { const char *name; void (*printch)(char ch); @@ -47,6 +58,7 @@ struct earlycon_match { static const struct earlycon_match earlycon_match[] __initconst = { { .name = "pl011", .printch = pl011_printch, }, + { .name = "smh", .printch = smh_printch, }, {} }; |
