diff options
| author | wdenk <wdenk> | 2002-07-20 10:56:28 +0000 |
|---|---|---|
| committer | wdenk <wdenk> | 2002-07-20 10:56:28 +0000 |
| commit | 43c377fc0ade24d6ff18487c616385cabd46c15a (patch) | |
| tree | 28deb0fb8e7146a7d67cec7dcff4bff8db8098c8 /board/impa7 | |
| parent | befe61a19016c4b3e9788e52ead0efb9905f68bf (diff) | |
Initial revision
Diffstat (limited to 'board/impa7')
| -rw-r--r-- | board/impa7/memsetup.S | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/board/impa7/memsetup.S b/board/impa7/memsetup.S new file mode 100644 index 00000000000..d1d1a570003 --- /dev/null +++ b/board/impa7/memsetup.S @@ -0,0 +1,87 @@ +/* + * Memory Setup stuff - taken from ??? + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + + + +#include <config.h> +#include <version.h> + + +/* some parameters for the board */ + +SYSCON2: .long 0x80001100 +MEMCFG1: .long 0x80000180 +MEMCFG2: .long 0x800001C0 +DRFPR: .long 0x80000200 + +syscon2_mask: .long 0x00000004 +memcfg1_val: .long 0x160c1414 +memcfg2_mask: .long 0x0000ffff @ only set lower 16 bits +memcfg2_val: .long 0x00000000 @ upper 16 bits are reserved for CS7 + CS6 +drfpr_val: .long 0x00000081 +/* setting up the memory */ + +.globl memsetup +memsetup: + /* + * DRFPR + * 64kHz DRAM refresh + */ + ldr r0, DRFPR + ldr r1, drfpr_val + str r1, [r0] + + /* + * SYSCON2: clear bit 2, DRAM is 32 bits wide + */ + ldr r0, SYSCON2 + ldr r2, [r0] + ldr r1, syscon2_mask + bic r2, r2, r1 + str r2, [r0] + + /* + * MEMCFG1 + * Setting up Keyboard at CS3, 8 Bit, 3 Waitstates + * Setting up CS8900 (Ethernet) at CS2, 32 Bit, 5 Waitstates + * Setting up flash at CS0 and CS1, 32 Bit, 3 Waitstates + */ + ldr r0, MEMCFG1 + ldr r1, memcfg1_val + str r1, [r0] + + /* + * MEMCFG2 + * Setting up ? with 0 + * + */ + ldr r0, MEMCFG2 + ldr r2, [r0] + ldr r1, memcfg2_mask + bic r2, r2, r1 + ldr r1, memcfg2_val + orr r2, r2, r1 + str r2, [r0] + + /* everything is fine now */ + mov pc, lr + |