LXR linux/arch/arm/include/debug/vf.S

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/*
   3 * Copyright 2013 Freescale Semiconductor, Inc.
   4 */
   5
   6#define VF_UART0_BASE_ADDR      0x40027000
   7#define VF_UART1_BASE_ADDR      0x40028000
   8#define VF_UART2_BASE_ADDR      0x40029000
   9#define VF_UART3_BASE_ADDR      0x4002a000
  10#define VF_UART_BASE_ADDR(n)    VF_UART##n##_BASE_ADDR
  11#define VF_UART_BASE(n)         VF_UART_BASE_ADDR(n)
  12#define VF_UART_PHYSICAL_BASE   VF_UART_BASE(CONFIG_DEBUG_VF_UART_PORT)
  13
  14#define VF_UART_VIRTUAL_BASE    0xfe000000
  15
  16        .macro  addruart, rp, rv, tmp
  17        ldr     \rp, =VF_UART_PHYSICAL_BASE     @ physical
  18        and     \rv, \rp, #0xffffff             @ offset within 16MB section
  19        add     \rv, \rv, #VF_UART_VIRTUAL_BASE
  20        .endm
  21
  22        .macro  senduart, rd, rx
  23        strb    \rd, [\rx, #0x7]        @ Data Register
  24        .endm
  25
  26        .macro  busyuart, rd, rx
  271001:   ldrb    \rd, [\rx, #0x4]        @ Status Register 1
  28        tst     \rd, #1 << 6            @ TC
  29        beq     1001b                   @ wait until transmit done
  30        .endm
  31
  32        .macro  waituart,rd,rx
  33        .endm
  34