1d2912cb1SThomas Gleixner/* SPDX-License-Identifier: GPL-2.0-only */ 26dde5ac5SShawn Guo/* arch/arm/mach-imx/include/mach/debug-macro.S 36dde5ac5SShawn Guo * 46dde5ac5SShawn Guo * Debugging macro include header 56dde5ac5SShawn Guo * 66dde5ac5SShawn Guo * Copyright (C) 1994-1999 Russell King 76dde5ac5SShawn Guo * Moved from linux/arch/arm/kernel/debug.S by Ben Dooks 86dde5ac5SShawn Guo */ 949c9e60eSShawn Guo 1026e30c64SJohannes Berg#include <asm/assembler.h> 11f8c95fe6SShawn Guo#include "imx-uart.h" 126dde5ac5SShawn Guo 136dde5ac5SShawn Guo/* 146dde5ac5SShawn Guo * FIXME: This is a copy of IMX_IO_P2V in hardware.h, and needs to 156dde5ac5SShawn Guo * stay sync with that. It's hard to maintain, and should be fixed 166dde5ac5SShawn Guo * globally for multi-platform build to use a fixed virtual address 176dde5ac5SShawn Guo * for low-level debug uart port across platforms. 186dde5ac5SShawn Guo */ 196dde5ac5SShawn Guo#define IMX_IO_P2V(x) ( \ 206dde5ac5SShawn Guo (((x) & 0x80000000) >> 7) | \ 216dde5ac5SShawn Guo (0xf4000000 + \ 226dde5ac5SShawn Guo (((x) & 0x50000000) >> 6) + \ 236dde5ac5SShawn Guo (((x) & 0x0b000000) >> 4) + \ 246dde5ac5SShawn Guo (((x) & 0x000fffff)))) 256dde5ac5SShawn Guo 266dde5ac5SShawn Guo#define UART_VADDR IMX_IO_P2V(UART_PADDR) 276dde5ac5SShawn Guo 286dde5ac5SShawn Guo .macro addruart, rp, rv, tmp 296dde5ac5SShawn Guo ldr \rp, =UART_PADDR @ physical 306dde5ac5SShawn Guo ldr \rv, =UART_VADDR @ virtual 316dde5ac5SShawn Guo .endm 326dde5ac5SShawn Guo 336dde5ac5SShawn Guo .macro senduart,rd,rx 3426e30c64SJohannes Berg ARM_BE8(rev \rd, \rd) 356dde5ac5SShawn Guo str \rd, [\rx, #0x40] @ TXDATA 366dde5ac5SShawn Guo .endm 376dde5ac5SShawn Guo 382c50a570SLinus Walleij .macro waituartcts,rd,rx 392c50a570SLinus Walleij .endm 402c50a570SLinus Walleij 412c50a570SLinus Walleij .macro waituarttxrdy,rd,rx 426dde5ac5SShawn Guo .endm 436dde5ac5SShawn Guo 446dde5ac5SShawn Guo .macro busyuart,rd,rx 456dde5ac5SShawn Guo1002: ldr \rd, [\rx, #0x98] @ SR2 4626e30c64SJohannes Berg ARM_BE8(rev \rd, \rd) 476dde5ac5SShawn Guo tst \rd, #1 << 3 @ TXDC 486dde5ac5SShawn Guo beq 1002b @ wait until transmit done 496dde5ac5SShawn Guo .endm 50