include/asm-arm/arch-l7200/uncompress.h

   1 /*
   2  * linux/include/asm-arm/arch-l7200/uncompress.h
   3  *
   4  * Copyright (C) 2000 Steve Hill (sjhill@cotw.com)
   5  *
   6  * Changelog:
   7  *  05-01-2000  SJH     Created
   8  *  05-13-2000  SJH     Filled in function bodies
   9  *  07-26-2000  SJH     Removed hard coded buad rate
  10  */
  11
  12 #include <asm/hardware.h>
  13
  14 #define IO_UART  IO_START + 0x00044000
  15
  16 #define __raw_writeb(v,p)       (*(volatile unsigned char *)(p) = (v))
  17 #define __raw_readb(p)          (*(volatile unsigned char *)(p))
  18
  19 static __inline__ void putc(char c)
  20 {
  21         while(__raw_readb(IO_UART + 0x18) & 0x20 ||
  22                 __raw_readb(IO_UART + 0x18) & 0x08);
  23         __raw_writeb(c, IO_UART + 0x00);
  24 }
  25
  26 static void putstr(const char *s)
  27 {
  28         while (*s) {
  29                 if (*s == 10) {                 /* If a LF, add CR */
  30                         putc(10);
  31                         putc(13);
  32                 }
  33                 putc(*(s++));
  34         }
  35 }
  36
  37 static __inline__ void arch_decomp_setup(void)
  38 {
  39         __raw_writeb(0x00, IO_UART + 0x08);     /* Set HSB */
  40         __raw_writeb(0x00, IO_UART + 0x20);     /* Disable IRQs */
  41         __raw_writeb(0x01, IO_UART + 0x14);     /* Enable UART */
  42 }
  43
  44 #define arch_decomp_wdog()