include/asm-arm/arch-s3c2410/debug-macro.S

   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-gpio.h>
  17 #include <asm/plat-s3c/regs-serial.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_S3C_UART != 0
  28                 add     \rx, \rx, #(S3C2410_UART1_OFF * CONFIG_DEBUG_S3C_UART)
  29 #endif
  30         .endm
  31
  32         .macro fifo_full_s3c24xx rd, rx
  33                 @ check for arm920 vs arm926. currently assume all arm926
  34                 @ devices have an 64 byte FIFO identical to the s3c2440
  35                 mrc     p15, 0, \rd, c0, c0
  36                 and     \rd, \rd, #0xff0
  37                 teq     \rd, #0x260
  38                 beq     1004f
  39                 mrc     p15, 0, \rd, c1, c0
  40                 tst     \rd, #1
  41                 addeq   \rd, \rx, #(S3C24XX_PA_GPIO - S3C24XX_PA_UART)
  42                 addne   \rd, \rx, #(S3C24XX_VA_GPIO - S3C24XX_VA_UART)
  43                 bic     \rd, \rd, #0xff000
  44                 ldr     \rd, [ \rd, # S3C2410_GSTATUS1 - S3C2410_GPIOREG(0) ]
  45                 and     \rd, \rd, #0x00ff0000
  46                 teq     \rd, #0x00440000                @ is it 2440?
  47 1004:
  48                 ldr     \rd, [ \rx, # S3C2410_UFSTAT ]
  49                 moveq   \rd, \rd, lsr #SHIFT_2440TXF
  50                 tst     \rd, #S3C2410_UFSTAT_TXFULL
  51         .endm
  52
  53         .macro  fifo_full_s3c2410 rd, rx
  54                 ldr     \rd, [ \rx, # S3C2410_UFSTAT ]
  55                 tst     \rd, #S3C2410_UFSTAT_TXFULL
  56         .endm
  57
  58 /* fifo level reading */
  59
  60         .macro fifo_level_s3c24xx rd, rx
  61                 @ check for arm920 vs arm926. currently assume all arm926
  62                 @ devices have an 64 byte FIFO identical to the s3c2440
  63                 mrc     p15, 0, \rd, c0, c0
  64                 and     \rd, \rd, #0xff0
  65                 teq     \rd, #0x260
  66                 beq     10000f
  67                 mrc     p15, 0, \rd, c1, c0
  68                 tst     \rd, #1
  69                 addeq   \rd, \rx, #(S3C24XX_PA_GPIO - S3C24XX_PA_UART)
  70                 addne   \rd, \rx, #(S3C24XX_VA_GPIO - S3C24XX_VA_UART)
  71                 bic     \rd, \rd, #0xff000
  72                 ldr     \rd, [ \rd, # S3C2410_GSTATUS1 - S3C2410_GPIOREG(0) ]
  73                 and     \rd, \rd, #0x00ff0000
  74                 teq     \rd, #0x00440000                @ is it 2440?
  75
  76 10000:
  77                 ldr     \rd, [ \rx, # S3C2410_UFSTAT ]
  78                 andne   \rd, \rd, #S3C2410_UFSTAT_TXMASK
  79                 andeq   \rd, \rd, #S3C2440_UFSTAT_TXMASK
  80         .endm
  81
  82         .macro fifo_level_s3c2410 rd, rx
  83                 ldr     \rd, [ \rx, # S3C2410_UFSTAT ]
  84                 and     \rd, \rd, #S3C2410_UFSTAT_TXMASK
  85         .endm
  86
  87 /* Select the correct implementation depending on the configuration. The
  88  * S3C2440 will get selected by default, as these are the most widely
  89  * used variants of these
  90 */
  91
  92 #if defined(CONFIG_CPU_LLSERIAL_S3C2410_ONLY)
  93 #define fifo_full  fifo_full_s3c2410
  94 #define fifo_level fifo_level_s3c2410
  95 #elif !defined(CONFIG_CPU_LLSERIAL_S3C2440_ONLY)
  96 #define fifo_full  fifo_full_s3c24xx
  97 #define fifo_level fifo_level_s3c24xx
  98 #endif
  99
 100 /* include the reset of the code which will do the work */
 101
 102 #include <asm/plat-s3c/debug-macro.S>