diff options
Diffstat (limited to 'arch/arm/include/asm/proc-armv/domain.h')
| -rw-r--r-- | arch/arm/include/asm/proc-armv/domain.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/arch/arm/include/asm/proc-armv/domain.h b/arch/arm/include/asm/proc-armv/domain.h new file mode 100644 index 000000000..aadc83187 --- /dev/null +++ b/arch/arm/include/asm/proc-armv/domain.h @@ -0,0 +1,50 @@ +/* + * linux/include/asm-arm/proc-armv/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_KERNEL - domain 1 includes all kernel memory only + * DOMAIN_USER - domain 0 includes all user memory only + */ +#define DOMAIN_USER 0 +#define DOMAIN_KERNEL 1 +#define DOMAIN_TABLE 1 +#define DOMAIN_IO 2 + +/* + * Domain types + */ +#define DOMAIN_NOACCESS 0 +#define DOMAIN_CLIENT 1 +#define DOMAIN_MANAGER 3 + +#define domain_val(dom,type) ((type) << 2*(dom)) + +#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 { \ + unsigned int domain = current->thread.domain; \ + domain &= ~domain_val(dom, DOMAIN_MANAGER); \ + domain |= domain_val(dom, type); \ + current->thread.domain = domain; \ + set_domain(current->thread.domain); \ + } while (0) + +#endif |