MIPS: zboot: Add support for serial debug using the PROM (dbb98314) · Commits · 戴 / test

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:

Alban 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:

Ralf Baechle <ralf@linux-mips.org>

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);
		}

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