arch/arm/include/debug/zynq.S

   1 /*
   2  * Debugging macro include header
   3  *
   4  *  Copyright (C) 2011 Xilinx
   5  *
   6  * This software is licensed under the terms of the GNU General Public
   7  * License version 2, as published by the Free Software Foundation, and
   8  * may be copied, distributed, and modified under those terms.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15 #define UART_CR_OFFSET          0x00  /* Control Register [8:0] */
  16 #define UART_SR_OFFSET          0x2C  /* Channel Status [11:0] */
  17 #define UART_FIFO_OFFSET        0x30  /* FIFO [15:0] or [7:0] */
  18
  19 #define UART_SR_TXFULL          0x00000010      /* TX FIFO full */
  20 #define UART_SR_TXEMPTY         0x00000008      /* TX FIFO empty */
  21
  22 #define UART0_PHYS              0xE0000000
  23 #define UART0_VIRT              0xF0000000
  24 #define UART1_PHYS              0xE0001000
  25 #define UART1_VIRT              0xF0001000
  26
  27 #if IS_ENABLED(CONFIG_DEBUG_ZYNQ_UART1)
  28 # define LL_UART_PADDR          UART1_PHYS
  29 # define LL_UART_VADDR          UART1_VIRT
  30 #else
  31 # define LL_UART_PADDR          UART0_PHYS
  32 # define LL_UART_VADDR          UART0_VIRT
  33 #endif
  34
  35                 .macro  addruart, rp, rv, tmp
  36                 ldr     \rp, =LL_UART_PADDR     @ physical
  37                 ldr     \rv, =LL_UART_VADDR     @ virtual
  38                 .endm
  39
  40                 .macro  senduart,rd,rx
  41                 str     \rd, [\rx, #UART_FIFO_OFFSET]   @ TXDATA
  42                 .endm
  43
  44                 .macro  waituart,rd,rx
  45 1001:           ldr     \rd, [\rx, #UART_SR_OFFSET]
  46 ARM_BE8(        rev     \rd, \rd )
  47                 tst     \rd, #UART_SR_TXEMPTY
  48                 beq     1001b
  49                 .endm
  50
  51                 .macro  busyuart,rd,rx
  52 1002:           ldr     \rd, [\rx, #UART_SR_OFFSET]     @ get status register
  53 ARM_BE8(        rev     \rd, \rd )
  54                 tst     \rd, #UART_SR_TXFULL            @
  55                 bne     1002b                   @ wait if FIFO is full
  56                 .endm