Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * arch/ppc/syslib/ibm440sp_common.c |
| 3 | * |
Roland Dreier | b0f7b8b | 2005-11-07 00:58:13 -0800 | [diff] [blame] | 4 | * PPC440SP/PPC440SPe system library |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * |
| 6 | * Matt Porter <mporter@kernel.crashing.org> |
| 7 | * Copyright 2002-2005 MontaVista Software Inc. |
| 8 | * |
| 9 | * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net> |
| 10 | * Copyright (c) 2003, 2004 Zultys Technologies |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify it |
| 13 | * under the terms of the GNU General Public License as published by the |
| 14 | * Free Software Foundation; either version 2 of the License, or (at your |
| 15 | * option) any later version. |
| 16 | * |
| 17 | */ |
| 18 | #include <linux/config.h> |
| 19 | #include <linux/types.h> |
| 20 | #include <linux/serial.h> |
| 21 | |
| 22 | #include <asm/param.h> |
| 23 | #include <asm/ibm44x.h> |
| 24 | #include <asm/mmu.h> |
| 25 | #include <asm/machdep.h> |
| 26 | #include <asm/time.h> |
| 27 | #include <asm/ppc4xx_pic.h> |
| 28 | |
| 29 | /* |
| 30 | * Read the 440SP memory controller to get size of system memory. |
| 31 | */ |
| 32 | unsigned long __init ibm440sp_find_end_of_memory(void) |
| 33 | { |
| 34 | u32 i; |
| 35 | u32 mem_size = 0; |
| 36 | |
| 37 | /* Read two bank sizes and sum */ |
Roland Dreier | b0f7b8b | 2005-11-07 00:58:13 -0800 | [diff] [blame] | 38 | for (i=0; i< MQ0_NUM_BANKS; i++) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | switch (mfdcr(DCRN_MQ0_BS0BAS + i) & MQ0_CONFIG_SIZE_MASK) { |
| 40 | case MQ0_CONFIG_SIZE_8M: |
| 41 | mem_size += PPC44x_MEM_SIZE_8M; |
| 42 | break; |
| 43 | case MQ0_CONFIG_SIZE_16M: |
| 44 | mem_size += PPC44x_MEM_SIZE_16M; |
| 45 | break; |
| 46 | case MQ0_CONFIG_SIZE_32M: |
| 47 | mem_size += PPC44x_MEM_SIZE_32M; |
| 48 | break; |
| 49 | case MQ0_CONFIG_SIZE_64M: |
| 50 | mem_size += PPC44x_MEM_SIZE_64M; |
| 51 | break; |
| 52 | case MQ0_CONFIG_SIZE_128M: |
| 53 | mem_size += PPC44x_MEM_SIZE_128M; |
| 54 | break; |
| 55 | case MQ0_CONFIG_SIZE_256M: |
| 56 | mem_size += PPC44x_MEM_SIZE_256M; |
| 57 | break; |
| 58 | case MQ0_CONFIG_SIZE_512M: |
| 59 | mem_size += PPC44x_MEM_SIZE_512M; |
| 60 | break; |
| 61 | case MQ0_CONFIG_SIZE_1G: |
| 62 | mem_size += PPC44x_MEM_SIZE_1G; |
| 63 | break; |
| 64 | case MQ0_CONFIG_SIZE_2G: |
| 65 | mem_size += PPC44x_MEM_SIZE_2G; |
| 66 | break; |
| 67 | default: |
| 68 | break; |
| 69 | } |
| 70 | return mem_size; |
| 71 | } |