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x86: Implement panic output for coreboot

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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>
This commit is contained in:
Simon Glass 2013-04-17 16:13:34 +00:00
parent 7282d834cd
commit c78a62acdf
2 changed files with 11 additions and 0 deletions
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10
arch/x86/cpu/coreboot/coreboot.c
View file

@ -26,6 +26,7 @@
#include <asm/u-boot-x86.h> #include <asm/u-boot-x86.h>
#include <flash.h> #include <flash.h>
#include <netdev.h> #include <netdev.h>
#include <ns16550.h>
#include <asm/msr.h> #include <asm/msr.h>
#include <asm/cache.h> #include <asm/cache.h>
#include <asm/io.h> #include <asm/io.h>
@ -135,3 +136,12 @@ int board_final_cleanup(void)
return 0; return 0;
} }
void panic_puts(const char *str)
{
NS16550_t port = (NS16550_t)0x3f8;
NS16550_init(port, 1);
while (*str)
NS16550_putc(port, *str++);
}

1
arch/x86/include/asm/u-boot-x86.h
View file

@ -33,6 +33,7 @@ void init_gd(gd_t *id, u64 *gdt_addr);
void setup_gdt(gd_t *id, u64 *gdt_addr); void setup_gdt(gd_t *id, u64 *gdt_addr);
int init_cache(void); int init_cache(void);
int cleanup_before_linux(void); int cleanup_before_linux(void);
void panic_puts(const char *str);
/* cpu/.../timer.c */ /* cpu/.../timer.c */
void timer_isr(void *); void timer_isr(void *);