forked from luck/tmp_suning_uos_patched
[MIPS] Qemu: Add early printk, your friend in a cold night.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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parent
a8049c53cd
commit
a57c228935
arch/mips
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@ -361,10 +361,10 @@ config QEMU
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select PCSPEAKER
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select SWAP_IO_SPACE
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select SYS_HAS_CPU_MIPS32_R1
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select SYS_HAS_EARLY_PRINTK
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select SYS_SUPPORTS_32BIT_KERNEL
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select SYS_SUPPORTS_BIG_ENDIAN
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select SYS_SUPPORTS_LITTLE_ENDIAN
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select ARCH_SPARSEMEM_ENABLE
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select GENERIC_HARDIRQS_NO__DO_IRQ
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select NR_CPUS_DEFAULT_1
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select SYS_SUPPORTS_SMP
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@ -4,6 +4,7 @@
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obj-y = q-firmware.o q-irq.o q-mem.o q-setup.o q-reset.o
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obj-$(CONFIG_SMP) += q-smp.o
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obj-$(CONFIG_EARLY_PRINTK) += q-console.o
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obj-$(CONFIG_SMP) += q-smp.o
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EXTRA_CFLAGS += -Werror
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26
arch/mips/qemu/q-console.c
Normal file
26
arch/mips/qemu/q-console.c
Normal file
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@ -0,0 +1,26 @@
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#include <linux/console.h>
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#include <linux/init.h>
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#include <linux/serial_reg.h>
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#include <asm/io.h>
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#define PORT(offset) (0x3f8 + (offset))
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static inline unsigned int serial_in(int offset)
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{
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return inb(PORT(offset));
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}
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static inline void serial_out(int offset, int value)
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{
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outb(value, PORT(offset));
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}
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int prom_putchar(char c)
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{
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while ((serial_in(UART_LSR) & UART_LSR_THRE) == 0)
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;
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serial_out(UART_TX, c);
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return 1;
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}
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@ -2,6 +2,9 @@
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#include <linux/string.h>
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#include <asm/addrspace.h>
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#include <asm/bootinfo.h>
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#include <asm/io.h>
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#define QEMU_PORT_BASE 0xb4000000
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void __init prom_init(void)
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{
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@ -15,4 +18,7 @@ void __init prom_init(void)
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} else {
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add_memory_region(0x0<<20, 0x10<<20, BOOT_MEM_RAM);
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}
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set_io_port_base(QEMU_PORT_BASE);
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}
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@ -6,8 +6,6 @@
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extern void qemu_reboot_setup(void);
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#define QEMU_PORT_BASE 0xb4000000
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const char *get_system_type(void)
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{
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return "Qemu";
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@ -20,6 +18,5 @@ void __init plat_time_init(void)
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void __init plat_mem_setup(void)
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{
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set_io_port_base(QEMU_PORT_BASE);
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qemu_reboot_setup();
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}
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