| /* 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 | |
| * | |
| * This program is free software; you can redistribute it and/or modify | |
| * it under the terms of the GNU General Public License version 2 as | |
| * published by the Free Software Foundation. | |
| * | |
| */ | |
| #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 |