| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 1 | /* arch/arm/mach-imx/include/mach/debug-macro.S |
| 2 | * |
| 3 | * Debugging macro include header |
| 4 | * |
| 5 | * Copyright (C) 1994-1999 Russell King |
| 6 | * Moved from linux/arch/arm/kernel/debug.S by Ben Dooks |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | * |
| 12 | */ |
| 13 | |
| 14 | #include <asm/assembler.h> |
| 15 | #include "imx-uart.h" |
| 16 | |
| 17 | /* |
| 18 | * FIXME: This is a copy of IMX_IO_P2V in hardware.h, and needs to |
| 19 | * stay sync with that. It's hard to maintain, and should be fixed |
| 20 | * globally for multi-platform build to use a fixed virtual address |
| 21 | * for low-level debug uart port across platforms. |
| 22 | */ |
| 23 | #define IMX_IO_P2V(x) ( \ |
| 24 | (((x) & 0x80000000) >> 7) | \ |
| 25 | (0xf4000000 + \ |
| 26 | (((x) & 0x50000000) >> 6) + \ |
| 27 | (((x) & 0x0b000000) >> 4) + \ |
| 28 | (((x) & 0x000fffff)))) |
| 29 | |
| 30 | #define UART_VADDR IMX_IO_P2V(UART_PADDR) |
| 31 | |
| 32 | .macro addruart, rp, rv, tmp |
| 33 | ldr \rp, =UART_PADDR @ physical |
| 34 | ldr \rv, =UART_VADDR @ virtual |
| 35 | .endm |
| 36 | |
| 37 | .macro senduart,rd,rx |
| 38 | ARM_BE8(rev \rd, \rd) |
| 39 | str \rd, [\rx, #0x40] @ TXDATA |
| 40 | .endm |
| 41 | |
| 42 | .macro waituart,rd,rx |
| 43 | .endm |
| 44 | |
| 45 | .macro busyuart,rd,rx |
| 46 | 1002: ldr \rd, [\rx, #0x98] @ SR2 |
| 47 | ARM_BE8(rev \rd, \rd) |
| 48 | tst \rd, #1 << 3 @ TXDC |
| 49 | beq 1002b @ wait until transmit done |
| 50 | .endm |