arch/cris/arch-v10/kernel/shadows.c

   1 /* $Id: shadows.c,v 1.2 2004/12/13 12:21:51 starvik Exp $
   2  *
   3  * Various shadow registers. Defines for these are in include/asm-etrax100/io.h
   4  */
   5
   6 /* Shadows for internal Etrax-registers */
   7
   8 unsigned long genconfig_shadow;
   9 unsigned long gen_config_ii_shadow;
  10 unsigned long port_g_data_shadow;
  11 unsigned char port_pa_dir_shadow;
  12 unsigned char port_pa_data_shadow;
  13 unsigned char port_pb_i2c_shadow;
  14 unsigned char port_pb_config_shadow;
  15 unsigned char port_pb_dir_shadow;
  16 unsigned char port_pb_data_shadow;
  17 unsigned long r_timer_ctrl_shadow;
  18
  19 /* Shadows for external I/O port registers.
  20  * These are only usable if there actually IS a latch connected
  21  * to the corresponding external chip-select pin.
  22  *
  23  * A common usage is that CSP0 controls LED's and CSP4 video chips.
  24  */
  25
  26 unsigned long port_cse1_shadow;
  27 unsigned long port_csp0_shadow;
  28 unsigned long port_csp4_shadow;
  29
  30 /* Corresponding addresses for the ports.
  31  * These are initialized in arch/cris/mm/init.c using ioremap.
  32  */
  33
  34 volatile unsigned long *port_cse1_addr;
  35 volatile unsigned long *port_csp0_addr;
  36 volatile unsigned long *port_csp4_addr;
  37