arch/powerpc/xmon/start_8xx.c

   1 /*
   2  * Copyright (C) 1996 Paul Mackerras.
   3  * Copyright (C) 2000 Dan Malek.
   4  * Quick hack of Paul's code to make XMON work on 8xx processors.  Lots
   5  * of assumptions, like the SMC1 is used, it has been initialized by the
   6  * loader at some point, and we can just stuff and suck bytes.
   7  * We rely upon the 8xx uart driver to support us, as the interface
   8  * changes between boot up and operational phases of the kernel.
   9  */
  10 #include <linux/string.h>
  11 #include <asm/machdep.h>
  12 #include <asm/io.h>
  13 #include <asm/page.h>
  14 #include <linux/kernel.h>
  15 #include <asm/8xx_immap.h>
  16 #include <asm/mpc8xx.h>
  17 #include <asm/commproc.h>
  18 #include "nonstdio.h"
  19
  20 extern int xmon_8xx_write(char *str, int nb);
  21 extern int xmon_8xx_read_poll(void);
  22 extern int xmon_8xx_read_char(void);
  23
  24 void xmon_map_scc(void)
  25 {
  26         cpmp = (cpm8xx_t *)&(((immap_t *)IMAP_ADDR)->im_cpm);
  27 }
  28
  29 void xmon_init_scc(void);
  30
  31 int xmon_write(void *ptr, int nb)
  32 {
  33         return(xmon_8xx_write(ptr, nb));
  34 }
  35
  36 int xmon_readchar(void)
  37 {
  38         return xmon_8xx_read_char();
  39 }
  40
  41 int xmon_read_poll(void)
  42 {
  43         return(xmon_8xx_read_poll());
  44 }