diff options
Diffstat (limited to 'arch/ppc/syslib/ibm440sp_common.c')
| -rw-r--r-- | arch/ppc/syslib/ibm440sp_common.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/arch/ppc/syslib/ibm440sp_common.c b/arch/ppc/syslib/ibm440sp_common.c new file mode 100644 index 000000000000..417d4cff77a0 --- /dev/null +++ b/arch/ppc/syslib/ibm440sp_common.c @@ -0,0 +1,71 @@ +/* + * arch/ppc/syslib/ibm440sp_common.c + * + * PPC440SP system library + * + * Matt Porter <mporter@kernel.crashing.org> + * Copyright 2002-2005 MontaVista Software Inc. + * + * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net> + * Copyright (c) 2003, 2004 Zultys Technologies + * + * 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. + * + */ +#include <linux/config.h> +#include <linux/types.h> +#include <linux/serial.h> + +#include <asm/param.h> +#include <asm/ibm44x.h> +#include <asm/mmu.h> +#include <asm/machdep.h> +#include <asm/time.h> +#include <asm/ppc4xx_pic.h> + +/* + * Read the 440SP memory controller to get size of system memory. + */ +unsigned long __init ibm440sp_find_end_of_memory(void) +{ + u32 i; + u32 mem_size = 0; + + /* Read two bank sizes and sum */ + for (i=0; i<2; i++) + switch (mfdcr(DCRN_MQ0_BS0BAS + i) & MQ0_CONFIG_SIZE_MASK) { + case MQ0_CONFIG_SIZE_8M: + mem_size += PPC44x_MEM_SIZE_8M; + break; + case MQ0_CONFIG_SIZE_16M: + mem_size += PPC44x_MEM_SIZE_16M; + break; + case MQ0_CONFIG_SIZE_32M: + mem_size += PPC44x_MEM_SIZE_32M; + break; + case MQ0_CONFIG_SIZE_64M: + mem_size += PPC44x_MEM_SIZE_64M; + break; + case MQ0_CONFIG_SIZE_128M: + mem_size += PPC44x_MEM_SIZE_128M; + break; + case MQ0_CONFIG_SIZE_256M: + mem_size += PPC44x_MEM_SIZE_256M; + break; + case MQ0_CONFIG_SIZE_512M: + mem_size += PPC44x_MEM_SIZE_512M; + break; + case MQ0_CONFIG_SIZE_1G: + mem_size += PPC44x_MEM_SIZE_1G; + break; + case MQ0_CONFIG_SIZE_2G: + mem_size += PPC44x_MEM_SIZE_2G; + break; + default: + break; + } + return mem_size; +} |