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Commit dbb98314 authored by Alban Bedel's avatar Alban Bedel Committed by Ralf Baechle
Browse files

MIPS: zboot: Add support for serial debug using the PROM 



As most platforms implement the PROM serial interface prom_putchar()
add a simple bridge to allow re-using this code for zboot.

Signed-off-by: default avatarAlban Bedel <albeu@free.fr>
Cc: Alex Smith <alex.smith@imgtec.com>
Cc: Andrew Bresticker <abrestic@chromium.org>
Cc: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/11811/


Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 25f66096

arch/mips/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -1766,6 +1766,10 @@ config SYS_SUPPORTS_ZBOOT_UART16550 
	bool

	select SYS_SUPPORTS_ZBOOT



config SYS_SUPPORTS_ZBOOT_UART_PROM

	bool

	select SYS_SUPPORTS_ZBOOT



config CPU_LOONGSON2

	bool

	select CPU_SUPPORTS_32BIT_KERNEL

arch/mips/boot/compressed/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -35,6 +35,7 @@ vmlinuzobjs-y := $(obj)/head.o $(obj)/decompress.o $(obj)/string.o 
ifdef CONFIG_DEBUG_ZBOOT

vmlinuzobjs-$(CONFIG_DEBUG_ZBOOT)		   += $(obj)/dbg.o

vmlinuzobjs-$(CONFIG_SYS_SUPPORTS_ZBOOT_UART16550) += $(obj)/uart-16550.o

vmlinuzobjs-$(CONFIG_SYS_SUPPORTS_ZBOOT_UART_PROM) += $(obj)/uart-prom.o

vmlinuzobjs-$(CONFIG_MIPS_ALCHEMY)		   += $(obj)/uart-alchemy.o

endif

arch/mips/boot/compressed/uart-prom.c

0 → 100644
+7 −0
Original line number Diff line number Diff line 


extern void prom_putchar(unsigned char ch);



void putc(char c)

{

	prom_putchar(c);

}