1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* arch/arm/mach-imx/include/mach/debug-macro.S 3 * 4 * Debugging macro include header 5 * 6 * Copyright (C) 1994-1999 Russell King 7 * Moved from linux/arch/arm/kernel/debug.S by Ben Dooks 8 */ 9 10 #include <asm/assembler.h> 11 #include "imx-uart.h" 12 13 /* 14 * FIXME: This is a copy of IMX_IO_P2V in hardware.h, and needs to 15 * stay sync with that. It's hard to maintain, and should be fixed 16 * globally for multi-platform build to use a fixed virtual address 17 * for low-level debug uart port across platforms. 18 */ 19 #define IMX_IO_P2V(x) ( \ 20 (((x) & 0x80000000) >> 7) | \ 21 (0xf4000000 + \ 22 (((x) & 0x50000000) >> 6) + \ 23 (((x) & 0x0b000000) >> 4) + \ 24 (((x) & 0x000fffff)))) 25 26 #define UART_VADDR IMX_IO_P2V(UART_PADDR) 27 28 .macro addruart, rp, rv, tmp 29 ldr \rp, =UART_PADDR @ physical 30 ldr \rv, =UART_VADDR @ virtual 31 .endm 32 33 .macro senduart,rd,rx 34 ARM_BE8(rev \rd, \rd) 35 str \rd, [\rx, #0x40] @ TXDATA 36 .endm 37 38 .macro waituartcts,rd,rx 39 .endm 40 41 .macro waituarttxrdy,rd,rx 42 .endm 43 44 .macro busyuart,rd,rx 45 1002: ldr \rd, [\rx, #0x98] @ SR2 46 ARM_BE8(rev \rd, \rd) 47 tst \rd, #1 << 3 @ TXDC 48 beq 1002b @ wait until transmit done 49 .endm 50