arch/m32r/boot/compressed/m32r_sio.c

   1 /*
   2  * arch/m32r/boot/compressed/m32r_sio.c
   3  *
   4  * 2003-02-12:  Takeo Takahashi
   5  * 2006-11-30:  OPSPUT support by Kazuhiro Inaoka
   6  *
   7  */
   8
   9 #include <asm/processor.h>
  10
  11 static void m32r_putc(char c);
  12
  13 static int puts(const char *s)
  14 {
  15         char c;
  16         while ((c = *s++))
  17                 m32r_putc(c);
  18         return 0;
  19 }
  20
  21 #if defined(CONFIG_PLAT_M32700UT) || defined(CONFIG_PLAT_OPSPUT)
  22 #include <asm/m32r.h>
  23 #include <asm/io.h>
  24
  25 #define USE_FPGA_MAP    0
  26
  27 #if USE_FPGA_MAP
  28 /*
  29  * fpga configuration program uses MMU, and define map as same as
  30  * M32104 uT-Engine board.
  31  */
  32 #define BOOT_SIO0STS    (volatile unsigned short *)(0x02c00000 + 0x20006)
  33 #define BOOT_SIO0TXB    (volatile unsigned short *)(0x02c00000 + 0x2000c)
  34 #else
  35 #undef PLD_BASE
  36 #if defined(CONFIG_PLAT_OPSPUT)
  37 #define PLD_BASE        0x1cc00000
  38 #else
  39 #define PLD_BASE        0xa4c00000
  40 #endif
  41 #define BOOT_SIO0STS    PLD_ESIO0STS
  42 #define BOOT_SIO0TXB    PLD_ESIO0TXB
  43 #endif
  44
  45 static void m32r_putc(char c)
  46 {
  47         while ((*BOOT_SIO0STS & 0x3) != 0x3)
  48                 cpu_relax();
  49         if (c == '\n') {
  50                 *BOOT_SIO0TXB = '\r';
  51                 while ((*BOOT_SIO0STS & 0x3) != 0x3)
  52                         cpu_relax();
  53         }
  54         *BOOT_SIO0TXB = c;
  55 }
  56 #else /* !(CONFIG_PLAT_M32700UT) */
  57 #if defined(CONFIG_PLAT_MAPPI2)
  58 #define SIO0STS (volatile unsigned short *)(0xa0efd000 + 14)
  59 #define SIO0TXB (volatile unsigned short *)(0xa0efd000 + 30)
  60 #else
  61 #define SIO0STS (volatile unsigned short *)(0x00efd000 + 14)
  62 #define SIO0TXB (volatile unsigned short *)(0x00efd000 + 30)
  63 #endif
  64
  65 static void m32r_putc(char c)
  66 {
  67         while ((*SIO0STS & 0x1) == 0)
  68                 cpu_relax();
  69         if (c == '\n') {
  70                 *SIO0TXB = '\r';
  71                 while ((*SIO0STS & 0x1) == 0)
  72                         cpu_relax();
  73         }
  74         *SIO0TXB = c;
  75 }
  76 #endif