forked from Minki/linux
f9c9affc57
This patch adds support for building a compressed kernel for the JZ4740 architecture. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Maarten ter Huurne <maarten@treewalker.org> Cc: Sergei Shtylyov <sshtylyov@mvista.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/3563/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
49 lines
970 B
C
49 lines
970 B
C
/*
|
|
* 16550 compatible uart based serial debug support for zboot
|
|
*/
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/serial_reg.h>
|
|
#include <linux/init.h>
|
|
|
|
#include <asm/addrspace.h>
|
|
|
|
#if defined(CONFIG_MACH_LOONGSON) || defined(CONFIG_MIPS_MALTA)
|
|
#define UART_BASE 0x1fd003f8
|
|
#define PORT(offset) (CKSEG1ADDR(UART_BASE) + (offset))
|
|
#endif
|
|
|
|
#ifdef CONFIG_AR7
|
|
#include <ar7.h>
|
|
#define PORT(offset) (CKSEG1ADDR(AR7_REGS_UART0) + (4 * offset))
|
|
#endif
|
|
|
|
#ifdef CONFIG_MACH_JZ4740
|
|
#define UART0_BASE 0xB0030000
|
|
#define PORT(offset) (UART0_BASE + (4 * offset))
|
|
#endif
|
|
|
|
#ifndef PORT
|
|
#error please define the serial port address for your own machine
|
|
#endif
|
|
|
|
static inline unsigned int serial_in(int offset)
|
|
{
|
|
return *((char *)PORT(offset));
|
|
}
|
|
|
|
static inline void serial_out(int offset, int value)
|
|
{
|
|
*((char *)PORT(offset)) = value;
|
|
}
|
|
|
|
void putc(char c)
|
|
{
|
|
int timeout = 1024;
|
|
|
|
while (((serial_in(UART_LSR) & UART_LSR_THRE) == 0) && (timeout-- > 0))
|
|
;
|
|
|
|
serial_out(UART_TX, c);
|
|
}
|