forked from luck/tmp_suning_uos_patched
620879c9e3
The ARM Architecture Reference Manual specifies that a prefetch flush is needed after changing the DACR register (chapter B2.7.6). Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
79 lines
2.1 KiB
C
79 lines
2.1 KiB
C
/*
|
|
* 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__
|
|
|
|
#ifdef CONFIG_MMU
|
|
#define set_domain(x) \
|
|
do { \
|
|
__asm__ __volatile__( \
|
|
"mcr p15, 0, %0, c3, c0 @ set domain" \
|
|
: : "r" (x)); \
|
|
isb(); \
|
|
} 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)
|
|
|
|
#else
|
|
#define set_domain(x) do { } while (0)
|
|
#define modify_domain(dom,type) do { } while (0)
|
|
#endif
|
|
|
|
#endif
|
|
#endif /* !__ASSEMBLY__ */
|