| /* 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 |
