arch/m32r/boot/compressed/m32r_sio.c

   1 /*
   2  * arch/m32r/boot/compressed/m32r_sio.c
   3  *
   4  * 2003-02-12:  Takeo Takahashi
   5  *
   6  */
   7
   8 #include <linux/config.h>
   9 #include <asm/processor.h>
  10
  11 static void putc(char c);
  12
  13 static int puts(const char *s)
  14 {
  15         char c;
  16         while ((c = *s++)) putc(c);
  17         return 0;
  18 }
  19
  20 #if defined(CONFIG_PLAT_M32700UT_Alpha) || defined(CONFIG_PLAT_M32700UT)
  21 #include <asm/m32r.h>
  22 #include <asm/io.h>
  23
  24 #define USE_FPGA_MAP    0
  25
  26 #if USE_FPGA_MAP
  27 /*
  28  * fpga configuration program uses MMU, and define map as same as
  29  * M32104 uT-Engine board.
  30  */
  31 #define BOOT_SIO0STS    (volatile unsigned short *)(0x02c00000 + 0x20006)
  32 #define BOOT_SIO0TXB    (volatile unsigned short *)(0x02c00000 + 0x2000c)
  33 #else
  34 #undef PLD_BASE
  35 #define PLD_BASE        0xa4c00000
  36 #define BOOT_SIO0STS    PLD_ESIO0STS
  37 #define BOOT_SIO0TXB    PLD_ESIO0TXB
  38 #endif
  39
  40 static void putc(char c)
  41 {
  42         while ((*BOOT_SIO0STS & 0x3) != 0x3)
  43                 cpu_relax();
  44         if (c == '\n') {
  45                 *BOOT_SIO0TXB = '\r';
  46                 while ((*BOOT_SIO0STS & 0x3) != 0x3)
  47                         cpu_relax();
  48         }
  49         *BOOT_SIO0TXB = c;
  50 }
  51 #else /* !(CONFIG_PLAT_M32700UT_Alpha) && !(CONFIG_PLAT_M32700UT) */
  52 #if defined(CONFIG_PLAT_MAPPI2)
  53 #define SIO0STS (volatile unsigned short *)(0xa0efd000 + 14)
  54 #define SIO0TXB (volatile unsigned short *)(0xa0efd000 + 30)
  55 #else
  56 #define SIO0STS (volatile unsigned short *)(0x00efd000 + 14)
  57 #define SIO0TXB (volatile unsigned short *)(0x00efd000 + 30)
  58 #endif
  59
  60 static void putc(char c)
  61 {
  62         while ((*SIO0STS & 0x1) == 0)
  63                 cpu_relax();
  64         if (c == '\n') {
  65                 *SIO0TXB = '\r';
  66                 while ((*SIO0STS & 0x1) == 0)
  67                         cpu_relax();
  68         }
  69         *SIO0TXB = c;
  70 }
  71 #endif