| Thomas Gleixner | d2912cb | 2019-06-04 10:11:33 +0200 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| Shawn Guo | 6dde5ac | 2012-09-16 20:50:45 +0800 | [diff] [blame] | 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 |
| Shawn Guo | 6dde5ac | 2012-09-16 20:50:45 +0800 | [diff] [blame] | 8 | */ |
| Shawn Guo | 49c9e60 | 2012-10-08 13:44:29 +0800 | [diff] [blame] | 9 | |
| Johannes Berg | 26e30c6 | 2016-01-27 17:59:36 +0100 | [diff] [blame] | 10 | #include <asm/assembler.h> |
| Shawn Guo | f8c95fe | 2012-12-12 19:03:53 +0800 | [diff] [blame] | 11 | #include "imx-uart.h" |
| Shawn Guo | 6dde5ac | 2012-09-16 20:50:45 +0800 | [diff] [blame] | 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 |
| Johannes Berg | 26e30c6 | 2016-01-27 17:59:36 +0100 | [diff] [blame] | 34 | ARM_BE8(rev \rd, \rd) |
| Shawn Guo | 6dde5ac | 2012-09-16 20:50:45 +0800 | [diff] [blame] | 35 | str \rd, [\rx, #0x40] @ TXDATA |
| 36 | .endm |
| 37 | |
| 38 | .macro waituart,rd,rx |
| 39 | .endm |
| 40 | |
| 41 | .macro busyuart,rd,rx |
| 42 | 1002: ldr \rd, [\rx, #0x98] @ SR2 |
| Johannes Berg | 26e30c6 | 2016-01-27 17:59:36 +0100 | [diff] [blame] | 43 | ARM_BE8(rev \rd, \rd) |
| Shawn Guo | 6dde5ac | 2012-09-16 20:50:45 +0800 | [diff] [blame] | 44 | tst \rd, #1 << 3 @ TXDC |
| 45 | beq 1002b @ wait until transmit done |
| 46 | .endm |