root/arch/arm/include/debug/pl01x.S

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /* arch/arm/include/debug/pl01x.S
   3  *
   4  * Debugging macro include header
   5  *
   6  *  Copyright (C) 1994-1999 Russell King
   7  *  Moved from linux/arch/arm/kernel/debug.S by Ben Dooks
   8 */
   9 #include <linux/amba/serial.h>
  10 
  11 #ifdef CONFIG_DEBUG_ZTE_ZX
  12 #undef UART01x_DR
  13 #undef UART01x_FR
  14 #define UART01x_DR     0x04
  15 #define UART01x_FR     0x14
  16 #endif
  17 
  18 #ifdef CONFIG_DEBUG_UART_PHYS
  19                 .macro  addruart, rp, rv, tmp
  20                 ldr     \rp, =CONFIG_DEBUG_UART_PHYS
  21                 ldr     \rv, =CONFIG_DEBUG_UART_VIRT
  22                 .endm
  23 #endif
  24 
  25                 .macro  senduart,rd,rx
  26                 strb    \rd, [\rx, #UART01x_DR]
  27                 .endm
  28 
  29                 .macro  waituart,rd,rx
  30 1001:           ldr     \rd, [\rx, #UART01x_FR]
  31  ARM_BE8(       rev     \rd, \rd )
  32                 tst     \rd, #UART01x_FR_TXFF
  33                 bne     1001b
  34                 .endm
  35 
  36                 .macro  busyuart,rd,rx
  37 1001:           ldr     \rd, [\rx, #UART01x_FR]
  38  ARM_BE8(       rev     \rd, \rd )
  39                 tst     \rd, #UART01x_FR_BUSY
  40                 bne     1001b
  41                 .endm