From 849369d6c66d3054688672f97d31fceb8e8230fb Mon Sep 17 00:00:00 2001 From: root Date: Fri, 25 Dec 2015 04:40:36 +0000 Subject: initial_commit --- arch/arm/mach-footbridge/include/mach/memory.h | 69 ++++++++++++++++++++++++++ 1 file changed, 69 insertions(+) create mode 100644 arch/arm/mach-footbridge/include/mach/memory.h (limited to 'arch/arm/mach-footbridge/include/mach/memory.h') diff --git a/arch/arm/mach-footbridge/include/mach/memory.h b/arch/arm/mach-footbridge/include/mach/memory.h new file mode 100644 index 00000000..5c6df377 --- /dev/null +++ b/arch/arm/mach-footbridge/include/mach/memory.h @@ -0,0 +1,69 @@ +/* + * arch/arm/mach-footbridge/include/mach/memory.h + * + * Copyright (C) 1996-1999 Russell King. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * Changelog: + * 20-Oct-1996 RMK Created + * 31-Dec-1997 RMK Fixed definitions to reduce warnings. + * 17-May-1998 DAG Added __virt_to_bus and __bus_to_virt functions. + * 21-Nov-1998 RMK Changed __virt_to_bus and __bus_to_virt to macros. + * 21-Mar-1999 RMK Added PAGE_OFFSET for co285 architecture. + * Renamed to memory.h + * Moved PAGE_OFFSET and TASK_SIZE here + */ +#ifndef __ASM_ARCH_MEMORY_H +#define __ASM_ARCH_MEMORY_H + + +#if defined(CONFIG_FOOTBRIDGE_ADDIN) +/* + * If we may be using add-in footbridge mode, then we must + * use the out-of-line translation that makes use of the + * PCI BAR + */ +#ifndef __ASSEMBLY__ +extern unsigned long __virt_to_bus(unsigned long); +extern unsigned long __bus_to_virt(unsigned long); +extern unsigned long __pfn_to_bus(unsigned long); +extern unsigned long __bus_to_pfn(unsigned long); +#endif +#define __virt_to_bus __virt_to_bus +#define __bus_to_virt __bus_to_virt + +#elif defined(CONFIG_FOOTBRIDGE_HOST) + +/* + * The footbridge is programmed to expose the system RAM at 0xe0000000. + * The requirement is that the RAM isn't placed at bus address 0, which + * would clash with VGA cards. + */ +#define BUS_OFFSET 0xe0000000 +#define __virt_to_bus(x) ((x) + (BUS_OFFSET - PAGE_OFFSET)) +#define __bus_to_virt(x) ((x) - (BUS_OFFSET - PAGE_OFFSET)) +#define __pfn_to_bus(x) (__pfn_to_phys(x) + (BUS_OFFSET - PHYS_OFFSET)) +#define __bus_to_pfn(x) __phys_to_pfn((x) - (BUS_OFFSET - PHYS_OFFSET)) + +#else + +#error "Undefined footbridge mode" + +#endif + +/* + * Cache flushing area. + */ +#define FLUSH_BASE 0xf9000000 + +/* + * Physical DRAM offset. + */ +#define PLAT_PHYS_OFFSET UL(0x00000000) + +#define FLUSH_BASE_PHYS 0x50000000 + +#endif -- cgit v1.2.3