kernel-ark/arch/powerpc/xmon/start_8xx.c
Paul Mackerras fca5dcd483 powerpc: Simplify and clean up the xmon terminal I/O
This factors out the common bits of arch/powerpc/xmon/start_*.c into
a new nonstdio.c, and removes some stuff that was supposed to make
xmon's I/O routines somewhat stdio-like but was never used.

It also makes the parsing of the xmon= command line option common,
so that ppc32 can now use xmon={off,on,early} also.

Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-11-08 22:55:08 +11:00

45 lines
1.0 KiB
C

/*
* Copyright (C) 1996 Paul Mackerras.
* Copyright (C) 2000 Dan Malek.
* Quick hack of Paul's code to make XMON work on 8xx processors. Lots
* of assumptions, like the SMC1 is used, it has been initialized by the
* loader at some point, and we can just stuff and suck bytes.
* We rely upon the 8xx uart driver to support us, as the interface
* changes between boot up and operational phases of the kernel.
*/
#include <linux/string.h>
#include <asm/machdep.h>
#include <asm/io.h>
#include <asm/page.h>
#include <linux/kernel.h>
#include <asm/8xx_immap.h>
#include <asm/mpc8xx.h>
#include <asm/commproc.h>
#include "nonstdio.h"
extern int xmon_8xx_write(char *str, int nb);
extern int xmon_8xx_read_poll(void);
extern int xmon_8xx_read_char(void);
void xmon_map_scc(void)
{
cpmp = (cpm8xx_t *)&(((immap_t *)IMAP_ADDR)->im_cpm);
}
void xmon_init_scc(void);
int xmon_write(void *ptr, int nb)
{
return(xmon_8xx_write(ptr, nb));
}
int xmon_readchar(void)
{
return xmon_8xx_read_char();
}
int xmon_read_poll(void)
{
return(xmon_8xx_read_poll());
}