arch/arm/include/debug/sti.S

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * arch/arm/include/debug/sti.S
   4  *
   5  * Debugging macro include header
   6  * Copyright (C) 2013 STMicroelectronics (R&D) Limited.
   7  */
   8
   9 #define ASC_TX_BUF_OFF  0x04
  10 #define ASC_CTRL_OFF    0x0c
  11 #define ASC_STA_OFF     0x14
  12
  13 #define ASC_STA_TX_FULL         (1<<9)
  14 #define ASC_STA_TX_EMPTY        (1<<1)
  15
  16
  17                 .macro  addruart, rp, rv, tmp
  18                 ldr     \rp,      =CONFIG_DEBUG_UART_PHYS       @ physical base
  19                 ldr     \rv,      =CONFIG_DEBUG_UART_VIRT       @ virt base
  20                 .endm
  21
  22                 .macro  senduart,rd,rx
  23                 strb    \rd, [\rx, #ASC_TX_BUF_OFF]
  24                 .endm
  25
  26                 .macro  waituartcts,rd,rx
  27                 .endm
  28
  29                 .macro  waituarttxrdy,rd,rx
  30 1001:           ldr     \rd, [\rx, #ASC_STA_OFF]
  31                 tst     \rd, #ASC_STA_TX_FULL
  32                 bne     1001b
  33                 .endm
  34
  35                 .macro  busyuart,rd,rx
  36 1001:           ldr     \rd, [\rx, #ASC_STA_OFF]
  37                 tst     \rd, #ASC_STA_TX_EMPTY
  38                 beq     1001b
  39                 .endm