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| author | Alban Bedel <albeu@free.fr> | 2015-12-10 10:57:21 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2016-01-24 04:05:51 +0100 |
| commit | dbb983145312efba5f7928af1b180a0d83423150 (patch) | |
| tree | 98014f40f1c450716bf4b2966f31822b42ac03f0 /arch/mips | |
| parent | 25f66096ac0cbb8e757e6ce3f78665eedb946b17 (diff) | |
| download | lwn-dbb983145312efba5f7928af1b180a0d83423150.tar.gz lwn-dbb983145312efba5f7928af1b180a0d83423150.zip | |
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: 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>
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/Kconfig | 4 | ||||
| -rw-r--r-- | arch/mips/boot/compressed/Makefile | 1 | ||||
| -rw-r--r-- | arch/mips/boot/compressed/uart-prom.c | 7 |
3 files changed, 12 insertions, 0 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 058dfd2084b8..178cf1fbd033 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -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 diff --git a/arch/mips/boot/compressed/Makefile b/arch/mips/boot/compressed/Makefile index e66b2c69c29c..4eff1ef02eff 100644 --- a/arch/mips/boot/compressed/Makefile +++ b/arch/mips/boot/compressed/Makefile @@ -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 diff --git a/arch/mips/boot/compressed/uart-prom.c b/arch/mips/boot/compressed/uart-prom.c new file mode 100644 index 000000000000..1c3d51bc90bb --- /dev/null +++ b/arch/mips/boot/compressed/uart-prom.c @@ -0,0 +1,7 @@ + +extern void prom_putchar(unsigned char ch); + +void putc(char c) +{ + prom_putchar(c); +} |