Shawn Guo | 41fa75b | 2010-12-20 22:57:42 +0800 | [diff] [blame] | 1 | /* |
| 2 | * arch/arm/mach-mxs/include/mach/uncompress.h |
| 3 | * |
| 4 | * Copyright (C) 1999 ARM Limited |
| 5 | * Copyright (C) Shane Nay (shane@minirl.com) |
| 6 | * Copyright 2010 Freescale Semiconductor, Inc. All Rights Reserved. |
| 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 as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | */ |
| 18 | #ifndef __MACH_MXS_UNCOMPRESS_H__ |
| 19 | #define __MACH_MXS_UNCOMPRESS_H__ |
| 20 | |
| 21 | #include <asm/mach-types.h> |
| 22 | |
| 23 | static unsigned long mxs_duart_base; |
| 24 | |
| 25 | #define MXS_DUART(x) (*(volatile unsigned long *)(mxs_duart_base + (x))) |
| 26 | |
| 27 | #define MXS_DUART_DR 0x00 |
| 28 | #define MXS_DUART_FR 0x18 |
| 29 | #define MXS_DUART_FR_TXFE (1 << 7) |
| 30 | #define MXS_DUART_CR 0x30 |
| 31 | #define MXS_DUART_CR_UARTEN (1 << 0) |
| 32 | |
| 33 | /* |
| 34 | * The following code assumes the serial port has already been |
| 35 | * initialized by the bootloader. If it's not, the output is |
| 36 | * simply discarded. |
| 37 | */ |
| 38 | |
| 39 | static void putc(int ch) |
| 40 | { |
| 41 | if (!mxs_duart_base) |
| 42 | return; |
| 43 | if (!(MXS_DUART(MXS_DUART_CR) & MXS_DUART_CR_UARTEN)) |
| 44 | return; |
| 45 | |
| 46 | while (!(MXS_DUART(MXS_DUART_FR) & MXS_DUART_FR_TXFE)) |
| 47 | barrier(); |
| 48 | |
| 49 | MXS_DUART(MXS_DUART_DR) = ch; |
| 50 | } |
| 51 | |
| 52 | static inline void flush(void) |
| 53 | { |
| 54 | } |
| 55 | |
| 56 | #define MX23_DUART_BASE_ADDR 0x80070000 |
| 57 | #define MX28_DUART_BASE_ADDR 0x80074000 |
| 58 | |
| 59 | static inline void __arch_decomp_setup(unsigned long arch_id) |
| 60 | { |
| 61 | switch (arch_id) { |
| 62 | case MACH_TYPE_MX23EVK: |
| 63 | mxs_duart_base = MX23_DUART_BASE_ADDR; |
| 64 | break; |
| 65 | case MACH_TYPE_MX28EVK: |
| 66 | mxs_duart_base = MX28_DUART_BASE_ADDR; |
| 67 | break; |
| 68 | default: |
| 69 | break; |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | #define arch_decomp_setup() __arch_decomp_setup(arch_id) |
| 74 | #define arch_decomp_wdog() |
| 75 | |
| 76 | #endif /* __MACH_MXS_UNCOMPRESS_H__ */ |