Release 4.11 arch/arm/mach-footbridge/include/mach/memory.h

/*
 *  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


#define FLUSH_BASE_PHYS		0x50000000

#endif
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
61
50.83%
2
28.57%
Russell King
51
42.50%
4
57.14%
Nico Pitre
8
6.67%
1
14.29%
Total
120
100.00%
7
100.00%
Directory: arch/arm/mach-footbridge/include/mach

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