| wdenk | fe8c280 | 2002-11-03 00:38:21 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Memory Setup stuff - taken from blob memsetup.S |
| 3 | * |
| 4 | * Copyright (C) 1999 2000 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl) and |
| 5 | * Jan-Derk Bakker (J.D.Bakker@its.tudelft.nl) |
| 6 | * |
| 7 | * See file CREDITS for list of people who contributed to this |
| 8 | * project. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU General Public License as |
| 12 | * published by the Free Software Foundation; either version 2 of |
| 13 | * the License, or (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | * GNU General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License |
| 21 | * along with this program; if not, write to the Free Software |
| 22 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 23 | * MA 02111-1307 USA |
| 24 | */ |
| 25 | |
| 26 | |
| wdenk | fe8c280 | 2002-11-03 00:38:21 +0000 | [diff] [blame] | 27 | #include <config.h> |
| 28 | #include <version.h> |
| 29 | |
| 30 | |
| 31 | /* some parameters for the board */ |
| 32 | |
| 33 | MEM_BASE: .long 0xa0000000 |
| 34 | MEM_START: .long 0xc0000000 |
| 35 | |
| 36 | #define MDCNFG 0x00 |
| 37 | #define MDCAS0 0x04 |
| 38 | #define MDCAS1 0x08 |
| 39 | #define MDCAS2 0x0c |
| 40 | #define MSC0 0x10 |
| 41 | #define MSC1 0x14 |
| 42 | #define MECR 0x18 |
| 43 | |
| 44 | mdcas0: .long 0xc71c703f |
| 45 | mdcas1: .long 0xffc71c71 |
| 46 | mdcas2: .long 0xffffffff |
| 47 | /* mdcnfg: .long 0x0bb2bcbf */ |
| 48 | mdcnfg: .long 0x0334b22f @ alt |
| 49 | /* mcs0: .long 0xfff8fff8 */ |
| 50 | msc0: .long 0xad8c4888 @ alt |
| 51 | mecr: .long 0x00060006 |
| 52 | /* mecr: .long 0x994a994a @ alt */ |
| 53 | |
| 54 | /* setting up the memory */ |
| 55 | |
| wdenk | 400558b | 2005-04-02 23:52:25 +0000 | [diff] [blame] | 56 | .globl lowlevel_init |
| 57 | lowlevel_init: |
| wdenk | fe8c280 | 2002-11-03 00:38:21 +0000 | [diff] [blame] | 58 | ldr r0, MEM_BASE |
| 59 | |
| 60 | /* Setup the flash memory */ |
| 61 | ldr r1, msc0 |
| 62 | str r1, [r0, #MSC0] |
| 63 | |
| 64 | /* Set up the DRAM */ |
| 65 | |
| 66 | /* MDCAS0 */ |
| 67 | ldr r1, mdcas0 |
| 68 | str r1, [r0, #MDCAS0] |
| 69 | |
| 70 | /* MDCAS1 */ |
| 71 | ldr r1, mdcas1 |
| 72 | str r1, [r0, #MDCAS1] |
| 73 | |
| 74 | /* MDCAS2 */ |
| 75 | ldr r1, mdcas2 |
| 76 | str r1, [r0, #MDCAS2] |
| 77 | |
| 78 | /* MDCNFG */ |
| 79 | ldr r1, mdcnfg |
| 80 | str r1, [r0, #MDCNFG] |
| 81 | |
| 82 | /* Set up PCMCIA space */ |
| 83 | ldr r1, mecr |
| 84 | str r1, [r0, #MECR] |
| 85 | |
| 86 | /* Load something to activate bank */ |
| 87 | ldr r1, MEM_START |
| 88 | |
| 89 | .rept 8 |
| 90 | ldr r0, [r1] |
| 91 | .endr |
| 92 | |
| 93 | /* everything is fine now */ |
| 94 | mov pc, lr |