/* SPDX-License-Identifier: GPL-2.0-only */ /* arch/arm/mach-imx/include/mach/debug-macro.S * * Debugging macro include header * * Copyright (C) 1994-1999 Russell King * Moved from linux/arch/arm/kernel/debug.S by Ben Dooks */ #include <asm/assembler.h> #include "imx-uart.h" /* * FIXME: This is a copy of IMX_IO_P2V in hardware.h, and needs to * stay sync with that. It's hard to maintain, and should be fixed * globally for multi-platform build to use a fixed virtual address * for low-level debug uart port across platforms. */ #define IMX_IO_P2V(x) ( \ (((x) & 0x80000000) >> 7) | \ (0xf4000000 + \ (((x) & 0x50000000) >> 6) + \ (((x) & 0x0b000000) >> 4) + \ (((x) & 0x000fffff)))) #define UART_VADDR IMX_IO_P2V(UART_PADDR) .macro addruart, rp, rv, tmp ldr \rp, =UART_PADDR @ physical ldr \rv, =UART_VADDR @ virtual .endm .macro senduart,rd,rx ARM_BE8(rev \rd, \rd) str \rd, [\rx, #0x40] @ TXDATA .endm .macro waituart,rd,rx .endm .macro busyuart,rd,rx 1002: ldr \rd, [\rx, #0x98] @ SR2 ARM_BE8(rev \rd, \rd) tst \rd, #1 << 3 @ TXDC beq 1002b @ wait until transmit done .endm