| wdenk | ea66bc8 | 2004-04-15 23:23:39 +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 | * 2004 (c) MontaVista Software, Inc. |
| 7 | * |
| 8 | * See file CREDITS for list of people who contributed to this |
| 9 | * project. |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or |
| 12 | * modify it under the terms of the GNU General Public License as |
| 13 | * published by the Free Software Foundation; either version 2 of |
| 14 | * the License, or (at your option) any later version. |
| 15 | * |
| 16 | * This program is distributed in the hope that it will be useful, |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | * GNU General Public License for more details. |
| 20 | * |
| 21 | * You should have received a copy of the GNU General Public License |
| 22 | * along with this program; if not, write to the Free Software |
| 23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 24 | * MA 02111-1307 USA |
| 25 | */ |
| 26 | |
| 27 | |
| 28 | #include "config.h" |
| 29 | #include "version.h" |
| 30 | |
| 31 | |
| 32 | /*----------------------------------------------------------------------- |
| 33 | * Board defines: |
| 34 | */ |
| 35 | |
| 36 | #define MDCNFG 0x00 |
| 37 | #define MDCAS00 0x04 |
| 38 | #define MDCAS01 0x08 |
| 39 | #define MDCAS02 0x0C |
| 40 | #define MSC0 0x10 |
| 41 | #define MSC1 0x14 |
| 42 | #define MECR 0x18 |
| 43 | #define MDREFR 0x1C |
| 44 | #define MDCAS20 0x20 |
| 45 | #define MDCAS21 0x24 |
| 46 | #define MDCAS22 0x28 |
| 47 | #define MSC2 0x2C |
| 48 | #define SMCNFG 0x30 |
| 49 | |
| 50 | #define ASSABET_BCR (0x12000000) |
| 51 | #define ASSABET_BCR_DB1110 (0x00a07490 | (0<<16) | (0<<17)) |
| 52 | #define ASSABET_SCR_nNEPONSET (1 << 9) |
| 53 | #define NEPONSET_LEDS (0x10000010) |
| 54 | |
| 55 | |
| 56 | /*----------------------------------------------------------------------- |
| 57 | * Setup parameters for the board: |
| 58 | */ |
| 59 | |
| 60 | |
| 61 | MEM_BASE: .long 0xa0000000 |
| 62 | MEM_START: .long 0xc0000000 |
| 63 | |
| 64 | mdcnfg: .long 0x72547254 |
| 65 | mdcas00: .long 0xaaaaaa7f |
| 66 | mdcas01: .long 0xaaaaaaaa |
| 67 | mdcas02: .long 0xaaaaaaaa |
| 68 | msc0: .long 0x4b384370 |
| 69 | msc1: .long 0x22212419 |
| 70 | mecr: .long 0x994a994a |
| 71 | mdrefr: .long 0x04340327 |
| 72 | mdcas20: .long 0xaaaaaa7f |
| 73 | mdcas21: .long 0xaaaaaaaa |
| 74 | mdcas22: .long 0xaaaaaaaa |
| 75 | msc2: .long 0x42196669 |
| 76 | smcnfg: .long 0x00000000 |
| 77 | |
| 78 | BCR: .long ASSABET_BCR |
| 79 | BCR_DB1110: .long ASSABET_BCR_DB1110 |
| 80 | LEDS: .long NEPONSET_LEDS |
| 81 | |
| 82 | |
| wdenk | 400558b | 2005-04-02 23:52:25 +0000 | [diff] [blame] | 83 | .globl lowlevel_init |
| 84 | lowlevel_init: |
| wdenk | ea66bc8 | 2004-04-15 23:23:39 +0000 | [diff] [blame] | 85 | |
| 86 | /* Setting up the memory and stuff */ |
| 87 | |
| 88 | ldr r0, MEM_BASE |
| 89 | ldr r1, mdcas00 |
| 90 | str r1, [r0, #MDCAS00] |
| 91 | ldr r1, mdcas01 |
| 92 | str r1, [r0, #MDCAS01] |
| 93 | ldr r1, mdcas02 |
| 94 | str r1, [r0, #MDCAS02] |
| 95 | ldr r1, mdcas20 |
| 96 | str r1, [r0, #MDCAS20] |
| 97 | ldr r1, mdcas21 |
| 98 | str r1, [r0, #MDCAS21] |
| 99 | ldr r1, mdcas22 |
| 100 | str r1, [r0, #MDCAS22] |
| 101 | ldr r1, mdrefr |
| 102 | str r1, [r0, #MDREFR] |
| 103 | ldr r1, mecr |
| 104 | str r1, [r0, #MECR] |
| 105 | ldr r1, msc0 |
| 106 | str r1, [r0, #MSC0] |
| 107 | ldr r1, msc1 |
| 108 | str r1, [r0, #MSC1] |
| 109 | ldr r1, msc2 |
| 110 | str r1, [r0, #MSC2] |
| 111 | ldr r1, smcnfg |
| 112 | str r1, [r0, #SMCNFG] |
| 113 | |
| 114 | ldr r1, mdcnfg |
| 115 | str r1, [r0, #MDCNFG] |
| 116 | |
| 117 | /* Load something to activate bank */ |
| 118 | ldr r2, MEM_START |
| 119 | .rept 8 |
| 120 | ldr r3, [r2] |
| 121 | .endr |
| 122 | |
| 123 | /* Enable SDRAM */ |
| 124 | orr r1, r1, #0x00000001 |
| 125 | str r1, [r0, #MDCNFG] |
| 126 | |
| 127 | ldr r1, BCR |
| 128 | ldr r2, BCR_DB1110 |
| 129 | str r2, [r1] |
| 130 | |
| 131 | ldr r1, LEDS |
| 132 | mov r0, #0x3 |
| 133 | str r0, [r1] |
| 134 | |
| 135 | /* All done... */ |
| 136 | mov pc, lr |