f4117ac9e2
This uncouple PHYS_OFFSET from the platform definitions, thereby facilitating run-time computation of the physical memory offset. Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org> Acked-by: Viresh Kumar <viresh.kumar@st.com> Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com> Acked-by: Magnus Damm <damm@opensource.se> Acked-by: Tony Lindgren <tony@atomide.com> Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Acked-by: Wan ZongShun <mcuos.com@gmail.com> Acked-by: Kukjin Kim <kgene.kim@samsung.com> Acked-by: Eric Miao <eric.y.miao@gmail.com> Acked-by: Jiandong Zheng <jdzheng@broadcom.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
79 lines
2.7 KiB
C
79 lines
2.7 KiB
C
/*
|
|
* arch/arm/mach-clps711x/include/mach/memory.h
|
|
*
|
|
* Copyright (C) 1999 ARM Limited
|
|
*
|
|
* 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
|
|
*/
|
|
#ifndef __ASM_ARCH_MEMORY_H
|
|
#define __ASM_ARCH_MEMORY_H
|
|
|
|
/*
|
|
* Physical DRAM offset.
|
|
*/
|
|
#define PLAT_PHYS_OFFSET UL(0xc0000000)
|
|
|
|
#if !defined(CONFIG_ARCH_CDB89712) && !defined (CONFIG_ARCH_AUTCPU12)
|
|
|
|
#define __virt_to_bus(x) ((x) - PAGE_OFFSET)
|
|
#define __bus_to_virt(x) ((x) + PAGE_OFFSET)
|
|
#define __pfn_to_bus(x) (__pfn_to_phys(x) - PHYS_OFFSET)
|
|
#define __bus_to_pfn(x) __phys_to_pfn((x) + PHYS_OFFSET)
|
|
|
|
#endif
|
|
|
|
|
|
/*
|
|
* Like the SA1100, the EDB7211 has a large gap between physical RAM
|
|
* banks. In 2.2, the Psion (CL-PS7110) port added custom support for
|
|
* discontiguous physical memory. In 2.4, we can use the standard
|
|
* Linux NUMA support.
|
|
*
|
|
* This is not necessary for EP7211 implementations with only one used
|
|
* memory bank. For those systems, simply undefine CONFIG_DISCONTIGMEM.
|
|
*/
|
|
|
|
/*
|
|
* The PS7211 allows up to 256MB max per DRAM bank, but the EDB7211
|
|
* uses only one of the two banks (bank #1). However, even within
|
|
* bank #1, memory is discontiguous.
|
|
*
|
|
* The EDB7211 has two 8MB DRAM areas with 8MB of empty space between
|
|
* them, so we use 24 for the node max shift to get 16MB node sizes.
|
|
*/
|
|
|
|
/*
|
|
* Because of the wide memory address space between physical RAM banks on the
|
|
* SA1100, it's much more convenient to use Linux's NUMA support to implement
|
|
* our memory map representation. Assuming all memory nodes have equal access
|
|
* characteristics, we then have generic discontiguous memory support.
|
|
*
|
|
* Of course, all this isn't mandatory for SA1100 implementations with only
|
|
* one used memory bank. For those, simply undefine CONFIG_DISCONTIGMEM.
|
|
*
|
|
* The nodes are matched with the physical memory bank addresses which are
|
|
* incidentally the same as virtual addresses.
|
|
*
|
|
* node 0: 0xc0000000 - 0xc7ffffff
|
|
* node 1: 0xc8000000 - 0xcfffffff
|
|
* node 2: 0xd0000000 - 0xd7ffffff
|
|
* node 3: 0xd8000000 - 0xdfffffff
|
|
*/
|
|
#define SECTION_SIZE_BITS 24
|
|
#define MAX_PHYSMEM_BITS 32
|
|
|
|
#endif
|
|
|