Release 4.11 arch/arm/include/asm/domain.h
/*
* arch/arm/include/asm/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
#ifndef __ASSEMBLY__
#include <asm/barrier.h>
#include <asm/thread_info.h>
#endif
/*
* 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_USER 1
#define DOMAIN_IO 2
#else
#define DOMAIN_KERNEL 2
#define DOMAIN_USER 1
#define DOMAIN_IO 0
#endif
#define DOMAIN_VECTORS 3
/*
* Domain types
*/
#define DOMAIN_NOACCESS 0
#define DOMAIN_CLIENT 1
#ifdef CONFIG_CPU_USE_DOMAINS
#define DOMAIN_MANAGER 3
#else
#define DOMAIN_MANAGER 1
#endif
#define domain_mask(dom) ((3) << (2 * (dom)))
#define domain_val(dom,type) ((type) << (2 * (dom)))
#ifdef CONFIG_CPU_SW_DOMAIN_PAN
#define DACR_INIT \
(domain_val(DOMAIN_USER, DOMAIN_NOACCESS) | \
domain_val(DOMAIN_KERNEL, DOMAIN_MANAGER) | \
domain_val(DOMAIN_IO, DOMAIN_CLIENT) | \
domain_val(DOMAIN_VECTORS, DOMAIN_CLIENT))
#else
#define DACR_INIT \
(domain_val(DOMAIN_USER, DOMAIN_CLIENT) | \
domain_val(DOMAIN_KERNEL, DOMAIN_MANAGER) | \
domain_val(DOMAIN_IO, DOMAIN_CLIENT) | \
domain_val(DOMAIN_VECTORS, DOMAIN_CLIENT))
#endif
#define __DACR_DEFAULT \
domain_val(DOMAIN_KERNEL, DOMAIN_CLIENT) | \
domain_val(DOMAIN_IO, DOMAIN_CLIENT) | \
domain_val(DOMAIN_VECTORS, DOMAIN_CLIENT)
#define DACR_UACCESS_DISABLE \
(__DACR_DEFAULT | domain_val(DOMAIN_USER, DOMAIN_NOACCESS))
#define DACR_UACCESS_ENABLE \
(__DACR_DEFAULT | domain_val(DOMAIN_USER, DOMAIN_CLIENT))
#ifndef __ASSEMBLY__
#ifdef CONFIG_CPU_CP15_MMU
static inline unsigned int get_domain(void)
{
unsigned int domain;
asm(
"mrc p15, 0, %0, c3, c0 @ get domain"
: "=r" (domain)
: "m" (current_thread_info()->cpu_domain));
return domain;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Russell King | 18 | 100.00% | 2 | 100.00% |
| Total | 18 | 100.00% | 2 | 100.00% |
static inline void set_domain(unsigned val)
{
asm volatile(
"mcr p15, 0, %0, c3, c0 @ set domain"
: : "r" (val) : "memory");
isb();
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Russell King | 13 | 81.25% | 2 | 66.67% |
| Linus Torvalds (pre-git) | 3 | 18.75% | 1 | 33.33% |
| Total | 16 | 100.00% | 3 | 100.00% |
#else
static inline unsigned int get_domain(void)
{
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Vladimir Murzin | 13 | 100.00% | 1 | 100.00% |
| Total | 13 | 100.00% | 1 | 100.00% |
static inline void set_domain(unsigned val)
{
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Vladimir Murzin | 9 | 100.00% | 1 | 100.00% |
| Total | 9 | 100.00% | 1 | 100.00% |
#endif
#ifdef CONFIG_CPU_USE_DOMAINS
#define modify_domain(dom,type) \
do { \
unsigned int domain = get_domain(); \
domain &= ~domain_mask(dom); \
domain = domain | domain_val(dom, type); \
set_domain(domain); \
} while (0)
#else
static inline void modify_domain(unsigned dom, unsigned type) { }
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Russell King | 12 | 100.00% | 2 | 100.00% |
| Total | 12 | 100.00% | 2 | 100.00% |
#endif
/*
* Generate the T (user) versions of the LDR/STR and related
* instructions (inline assembly)
*/
#ifdef CONFIG_CPU_USE_DOMAINS
#define TUSER(instr) #instr "t"
#else
#define TUSER(instr) #instr
#endif
#else /* __ASSEMBLY__ */
/*
* Generate the T (user) versions of the LDR/STR and related
* instructions
*/
#ifdef CONFIG_CPU_USE_DOMAINS
#define TUSER(instr) instr ## t
#else
#define TUSER(instr) instr
#endif
#endif /* __ASSEMBLY__ */
#endif /* !__ASM_PROC_DOMAIN_H */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Russell King | 101 | 36.86% | 11 | 61.11% |
| Catalin Marinas | 60 | 21.90% | 2 | 11.11% |
| Linus Torvalds (pre-git) | 51 | 18.61% | 1 | 5.56% |
| Vladimir Murzin | 29 | 10.58% | 1 | 5.56% |
| Lennert Buytenhek | 20 | 7.30% | 1 | 5.56% |
| David Howells | 8 | 2.92% | 1 | 5.56% |
| George G. Davis | 5 | 1.82% | 1 | 5.56% |
| Total | 274 | 100.00% | 18 | 100.00% |
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.