Output earlyprintk to low-level debug functions when it's
available.
DEBUG_LL takes priority over platform earlyprintk because
people must know what are they doing when they are trying
to enable DEBUG_LL.
Reviewed-by: Philippe Mathieu-Daudé <philmd@xxxxxxxxxx>
Signed-off-by: Jiaxun Yang <jiaxun.yang@xxxxxxxxxxx>
---
arch/mips/Kconfig.debug | 2 +-
arch/mips/kernel/early_printk.c | 19 +++++++++++++++++++
2 files changed, 20 insertions(+), 1 deletion(-)
diff --git a/arch/mips/Kconfig.debug b/arch/mips/Kconfig.debug
index 892e31804982..6ef42edc7d67 100644
--- a/arch/mips/Kconfig.debug
+++ b/arch/mips/Kconfig.debug
@@ -2,7 +2,7 @@
config EARLY_PRINTK
bool "Early printk" if EXPERT
- depends on SYS_HAS_EARLY_PRINTK
+ depends on SYS_HAS_EARLY_PRINTK || DEBUG_LL
default y
help
This option enables special console drivers which allow the kernel
diff --git a/arch/mips/kernel/early_printk.c b/arch/mips/kernel/early_printk.c
index 4a1647ddfbd9..c3f3b0a930f0 100644
--- a/arch/mips/kernel/early_printk.c
+++ b/arch/mips/kernel/early_printk.c
@@ -14,6 +14,24 @@
#include <asm/setup.h>
+#ifdef CONFIG_DEBUG_LL
+extern void printascii(const char *);
+
+static void early_console_write(struct console *con, const char *s, unsigned n)
+{
+ char buf[128];
+
+ while (n) {
+ unsigned int l = min(n, sizeof(buf)-1);
+
+ memcpy(buf, s, l);
+ buf[l] = 0;
+ s += l;
+ n -= l;
+ printascii(buf);
+ }
+}
+#else
static void early_console_write(struct console *con, const char *s, unsigned n)
{
while (n-- && *s) {
@@ -23,6 +41,7 @@ static void early_console_write(struct console *con, const char *s, unsigned n)
s++;
}
}
+#endif
static struct console early_console_prom = {
.name = "early",
--
2.34.1
