Commit a57c2289 authored by Ralf Baechle's avatar Ralf Baechle
Browse files

[MIPS] Qemu: Add early printk, your friend in a cold night. 



Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent a8049c53

arch/mips/Kconfig

+1 −1
Original line number Diff line number Diff line
@@ -361,10 +361,10 @@ config QEMU 
	select PCSPEAKER

	select SWAP_IO_SPACE

	select SYS_HAS_CPU_MIPS32_R1

	select SYS_HAS_EARLY_PRINTK

	select SYS_SUPPORTS_32BIT_KERNEL

	select SYS_SUPPORTS_BIG_ENDIAN

	select SYS_SUPPORTS_LITTLE_ENDIAN

	select ARCH_SPARSEMEM_ENABLE

	select GENERIC_HARDIRQS_NO__DO_IRQ

	select NR_CPUS_DEFAULT_1

	select SYS_SUPPORTS_SMP

arch/mips/qemu/Makefile

+2 −1
Original line number Diff line number Diff line
@@ -4,6 +4,7 @@ 


obj-y		= q-firmware.o q-irq.o q-mem.o q-setup.o q-reset.o



obj-$(CONFIG_EARLY_PRINTK)	+= q-console.o

obj-$(CONFIG_SMP)		+= q-smp.o



EXTRA_CFLAGS += -Werror

arch/mips/qemu/q-console.c

0 → 100644
+26 −0
Original line number Diff line number Diff line 
#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;

}

arch/mips/qemu/q-firmware.c

+6 −0
Original line number Diff line number Diff line
@@ -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);

}

arch/mips/qemu/q-setup.c

+0 −3
Original line number Diff line number Diff line
@@ -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();

}