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   1 /* linux/include/asm-arm/arch-s3c2410/debug-macro.S
   2  *
   3  * Debugging macro include header
   4  *
   5  *  Copyright (C) 1994-1999 Russell King
   6  *  Copyright (C) 2005 Simtec Electronics
   7  *
   8  *  Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13 */
  14
  15 #include <asm/arch/map.h>
  16 #include <asm/arch/regs-serial.h>
  17 #include <asm/arch/regs-gpio.h>
  18
  19 #define S3C2410_UART1_OFF (0x4000)
  20 #define SHIFT_2440TXF (14-9)
  21
  22                 .macro addruart, rx
  23                 mrc     p15, 0, \rx, c1, c0
  24                 tst     \rx, #1
  25                 ldreq   \rx, = S3C24XX_PA_UART
  26                 ldrne   \rx, = S3C24XX_VA_UART
  27 #if CONFIG_DEBUG_S3C2410_UART != 0
  28                 add     \rx, \rx, #(S3C2410_UART1_OFF * CONFIG_DEBUG_S3C2410_UART)
  29 #endif
  30                 .endm
  31
  32                 .macro  senduart,rd,rx
  33                 strb    \rd, [\rx, # S3C2410_UTXH ]
  34                 .endm
  35
  36                 .macro  busyuart, rd, rx
  37                 ldr     \rd, [ \rx, # S3C2410_UFCON ]
  38                 tst     \rd, #S3C2410_UFCON_FIFOMODE    @ fifo enabled?
  39                 beq     1001f                           @
  40                 @ FIFO enabled...
  41 1003:
  42                 @ check for arm920 vs arm926. currently assume all arm926
  43                 @ devices have an 64 byte FIFO identical to the s3c2440
  44                 mrc     p15, 0, \rd, c0, c0
  45                 and     \rd, \rd, #0xff0
  46                 teq     \rd, #0x260
  47                 beq     1004f
  48                 mrc     p15, 0, \rd, c1, c0
  49                 tst     \rd, #1
  50                 addeq   \rd, \rx, #(S3C24XX_PA_GPIO - S3C24XX_PA_UART)
  51                 addne   \rd, \rx, #(S3C24XX_VA_GPIO - S3C24XX_VA_UART)
  52                 bic     \rd, \rd, #0xff000
  53                 ldr     \rd, [ \rd, # S3C2410_GSTATUS1 - S3C2410_GPIOREG(0) ]
  54                 and     \rd, \rd, #0x00ff0000
  55                 teq     \rd, #0x00440000                @ is it 2440?
  56 1004:
  57                 ldr     \rd, [ \rx, # S3C2410_UFSTAT ]
  58                 moveq   \rd, \rd, lsr #SHIFT_2440TXF
  59                 tst     \rd, #S3C2410_UFSTAT_TXFULL
  60                 bne     1003b
  61                 b       1002f
  62
  63 1001:
  64                 @ busy waiting for non fifo
  65                 ldr     \rd, [ \rx, # S3C2410_UTRSTAT ]
  66                 tst     \rd, #S3C2410_UTRSTAT_TXFE
  67                 beq     1001b
  68
  69 1002:           @ exit busyuart
  70                 .endm
  71
  72                 .macro  waituart,rd,rx
  73
  74                 ldr     \rd, [ \rx, # S3C2410_UFCON ]
  75                 tst     \rd, #S3C2410_UFCON_FIFOMODE    @ fifo enabled?
  76                 beq     1001f                           @
  77                 @ FIFO enabled...
  78 1003:
  79                 mrc     p15, 0, \rd, c1, c0
  80                 tst     \rd, #1
  81                 addeq   \rd, \rx, #(S3C24XX_PA_GPIO - S3C24XX_PA_UART)
  82                 addne   \rd, \rx, #(S3C24XX_VA_GPIO - S3C24XX_VA_UART)
  83                 bic     \rd, \rd, #0xff000
  84                 ldr     \rd, [ \rd, # S3C2410_GSTATUS1 - S3C2410_GPIOREG(0) ]
  85                 and     \rd, \rd, #0x00ff0000
  86                 teq     \rd, #0x00440000                @ is it 2440?
  87
  88                 ldr     \rd, [ \rx, # S3C2410_UFSTAT ]
  89                 andne   \rd, \rd, #S3C2410_UFSTAT_TXMASK
  90                 andeq   \rd, \rd, #S3C2440_UFSTAT_TXMASK
  91                 teq     \rd, #0
  92                 bne     1003b
  93                 b       1002f
  94
  95 1001:
  96                 @ idle waiting for non fifo
  97                 ldr     \rd, [ \rx, # S3C2410_UTRSTAT ]
  98                 tst     \rd, #S3C2410_UTRSTAT_TXFE
  99                 beq     1001b
 100
 101 1002:           @ exit busyuart
 102                 .endm