diff options
| author | Ralf Baechle <ralf@linux-mips.org> | 2007-11-04 04:49:44 +0000 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2007-11-15 23:21:48 +0000 |
| commit | a57c228935fd55c4a1cf7c0b7823537c81914000 (patch) | |
| tree | 36a2aa23cf2f6aec80cb0c46469f8e9cdcddcabe /arch/mips/qemu | |
| parent | a8049c53cdad347b5b1234969dba65a179fdf8f1 (diff) | |
[MIPS] Qemu: Add early printk, your friend in a cold night.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/qemu')
| -rw-r--r-- | arch/mips/qemu/Makefile | 3 | ||||
| -rw-r--r-- | arch/mips/qemu/q-console.c | 26 | ||||
| -rw-r--r-- | arch/mips/qemu/q-firmware.c | 6 | ||||
| -rw-r--r-- | arch/mips/qemu/q-setup.c | 3 |
4 files changed, 34 insertions, 4 deletions
diff --git a/arch/mips/qemu/Makefile b/arch/mips/qemu/Makefile index cec24c117f6..2ba4ef34b4a 100644 --- a/arch/mips/qemu/Makefile +++ b/arch/mips/qemu/Makefile @@ -4,6 +4,7 @@ obj-y = q-firmware.o q-irq.o q-mem.o q-setup.o q-reset.o -obj-$(CONFIG_SMP) += q-smp.o +obj-$(CONFIG_EARLY_PRINTK) += q-console.o +obj-$(CONFIG_SMP) += q-smp.o EXTRA_CFLAGS += -Werror diff --git a/arch/mips/qemu/q-console.c b/arch/mips/qemu/q-console.c new file mode 100644 index 00000000000..81101ae5017 --- /dev/null +++ b/arch/mips/qemu/q-console.c @@ -0,0 +1,26 @@ +#include <linux/console.h> +#include <linux/init.h> +#include <linux/serial_reg.h> +#include <asm/io.h> + +#define PORT(offset) (0x3f8 + (offset)) + +static inline unsigned int serial_in(int offset) +{ + return inb(PORT(offset)); +} + +static inline void serial_out(int offset, int value) +{ + outb(value, PORT(offset)); +} + +int prom_putchar(char c) +{ + while ((serial_in(UART_LSR) & UART_LSR_THRE) == 0) + ; + + serial_out(UART_TX, c); + + return 1; +} diff --git a/arch/mips/qemu/q-firmware.c b/arch/mips/qemu/q-firmware.c index c2239b41758..3ed43f416cd 100644 --- a/arch/mips/qemu/q-firmware.c +++ b/arch/mips/qemu/q-firmware.c @@ -2,6 +2,9 @@ #include <linux/string.h> #include <asm/addrspace.h> #include <asm/bootinfo.h> +#include <asm/io.h> + +#define QEMU_PORT_BASE 0xb4000000 void __init prom_init(void) { @@ -15,4 +18,7 @@ void __init prom_init(void) } else { add_memory_region(0x0<<20, 0x10<<20, BOOT_MEM_RAM); } + + + set_io_port_base(QEMU_PORT_BASE); } diff --git a/arch/mips/qemu/q-setup.c b/arch/mips/qemu/q-setup.c index 23d34c1917c..969cedc8d8b 100644 --- a/arch/mips/qemu/q-setup.c +++ b/arch/mips/qemu/q-setup.c @@ -6,8 +6,6 @@ extern void qemu_reboot_setup(void); -#define QEMU_PORT_BASE 0xb4000000 - const char *get_system_type(void) { return "Qemu"; @@ -20,6 +18,5 @@ void __init plat_time_init(void) void __init plat_mem_setup(void) { - set_io_port_base(QEMU_PORT_BASE); qemu_reboot_setup(); } |