root/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 STIH41X_COMMS_BASE              0xfed00000
  10 #define STIH41X_ASC2_BASE               (STIH41X_COMMS_BASE+0x32000)
  11 
  12 #define STIH41X_SBC_LPM_BASE            0xfe400000
  13 #define STIH41X_SBC_COMMS_BASE          (STIH41X_SBC_LPM_BASE + 0x100000)
  14 #define STIH41X_SBC_ASC1_BASE           (STIH41X_SBC_COMMS_BASE + 0x31000)
  15 
  16 
  17 #define VIRT_ADDRESS(x)         (x - 0x1000000)
  18 
  19 #if IS_ENABLED(CONFIG_STIH41X_DEBUG_ASC2)
  20 #define DEBUG_LL_UART_BASE      STIH41X_ASC2_BASE
  21 #endif
  22 
  23 #if IS_ENABLED(CONFIG_STIH41X_DEBUG_SBC_ASC1)
  24 #define DEBUG_LL_UART_BASE      STIH41X_SBC_ASC1_BASE
  25 #endif
  26 
  27 #ifndef DEBUG_LL_UART_BASE
  28 #error "DEBUG UART is not Configured"
  29 #endif
  30 
  31 #define ASC_TX_BUF_OFF  0x04
  32 #define ASC_CTRL_OFF    0x0c
  33 #define ASC_STA_OFF     0x14
  34 
  35 #define ASC_STA_TX_FULL         (1<<9)
  36 #define ASC_STA_TX_EMPTY        (1<<1)
  37 
  38 
  39                 .macro  addruart, rp, rv, tmp
  40                 ldr     \rp,      =DEBUG_LL_UART_BASE   @ physical base
  41                 ldr     \rv,      =VIRT_ADDRESS(DEBUG_LL_UART_BASE) @ virt base
  42                 .endm
  43 
  44                 .macro  senduart,rd,rx
  45                 strb    \rd, [\rx, #ASC_TX_BUF_OFF]
  46                 .endm
  47 
  48                 .macro  waituart,rd,rx
  49 1001:           ldr     \rd, [\rx, #ASC_STA_OFF]
  50                 tst     \rd, #ASC_STA_TX_FULL
  51                 bne     1001b
  52                 .endm
  53 
  54                 .macro  busyuart,rd,rx
  55 1001:           ldr     \rd, [\rx, #ASC_STA_OFF]
  56                 tst     \rd, #ASC_STA_TX_EMPTY
  57                 beq     1001b
  58                 .endm