/* *  linux/include/asm-arm/domain.h * *  Copyright (C) 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. */#ifndef __ASM_PROC_DOMAIN_H#define __ASM_PROC_DOMAIN_H /* * Domain numbers * *  DOMAIN_IO     - domain 2 includes all IO only *  DOMAIN_USER   - domain 1 includes all user memory only *  DOMAIN_KERNEL - domain 0 includes all kernel memory only * * The domain numbering depends on whether we support 36 physical * address for I/O or not.  Addresses above the 32 bit boundary can * only be mapped using supersections and supersections can only * be set for domain 0.  We could just default to DOMAIN_IO as zero, * but there may be systems with supersection support and no 36-bit * addressing.  In such cases, we want to map system memory with * supersections to reduce TLB misses and footprint. * * 36-bit addressing and supersections are only available on * CPUs based on ARMv6+ or the Intel XSC3 core. */#ifndef CONFIG_IO_36#define DOMAIN_KERNEL	0#define DOMAIN_TABLE	0#define DOMAIN_USER	1#define DOMAIN_IO	2#else#define DOMAIN_KERNEL	2#define DOMAIN_TABLE	2#define DOMAIN_USER	1#define DOMAIN_IO	0#endif /* * Domain types */#define DOMAIN_NOACCESS	0#define DOMAIN_CLIENT	1#define DOMAIN_MANAGER	3 #define domain_val(dom,type)	((type) << (2*(dom))) #ifndef __ASSEMBLY__#define set_domain(x)					\	do {						\	__asm__ __volatile__(				\	"mcr	p15, 0, %0, c3, c0	@ set domain"	\	  : : "r" (x));					\	} while (0) #define modify_domain(dom,type)					\	do {							\	struct thread_info *thread = current_thread_info();	\	unsigned int domain = thread->cpu_domain;		\	domain &= ~domain_val(dom, DOMAIN_MANAGER);		\	thread->cpu_domain = domain | domain_val(dom, type);	\	set_domain(thread->cpu_domain);				\	} while (0) #endif#endif /* !__ASSEMBLY__ */