From c78a62acdfbc0a1cc75ee934f7897b9e99bd3e8d Mon Sep 17 00:00:00 2001
From: Simon Glass <sjg@chromium.org>
Date: Wed, 17 Apr 2013 16:13:34 +0000
Subject: [PATCH] x86: Implement panic output for coreboot
panic_puts() can be called in early boot to display a message. It might
help with early debugging.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Wai-Hong Tam <waihong@chromium.org>
---
arch/x86/cpu/coreboot/coreboot.c | 10 ++++++++++
arch/x86/include/asm/u-boot-x86.h | 1 +
2 files changed, 11 insertions(+)
diff --git a/arch/x86/cpu/coreboot/coreboot.c b/arch/x86/cpu/coreboot/coreboot.c
index f8e28f0c82..4a7dae4936 100644
--- a/arch/x86/cpu/coreboot/coreboot.c
+++ b/arch/x86/cpu/coreboot/coreboot.c
@@ -26,6 +26,7 @@
#include <asm/u-boot-x86.h>
#include <flash.h>
#include <netdev.h>
+#include <ns16550.h>
#include <asm/msr.h>
#include <asm/cache.h>
#include <asm/io.h>
@@ -135,3 +136,12 @@ int board_final_cleanup(void)
return 0;
}
+
+void panic_puts(const char *str)
+{
+ NS16550_t port = (NS16550_t)0x3f8;
+
+ NS16550_init(port, 1);
+ while (*str)
+ NS16550_putc(port, *str++);
+}
diff --git a/arch/x86/include/asm/u-boot-x86.h b/arch/x86/include/asm/u-boot-x86.h
index ae0c3883e4..5a59db61bf 100644
--- a/arch/x86/include/asm/u-boot-x86.h
+++ b/arch/x86/include/asm/u-boot-x86.h
@@ -33,6 +33,7 @@ void init_gd(gd_t *id, u64 *gdt_addr);
void setup_gdt(gd_t *id, u64 *gdt_addr);
int init_cache(void);
int cleanup_before_linux(void);
+void panic_puts(const char *str);
/* cpu/.../timer.c */
void timer_isr(void *);
--
2.39.5