projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 26025bbf JH |
1 | /* |
| 2 | * Copyright (C) 2010 Imagination Technologies | |
| 3 | */ | |
| 4 | ||
| 5 | #ifndef __ASM_METAG_USER_GATEWAY_H | |
| 6 | #define __ASM_METAG_USER_GATEWAY_H | |
| 7 | ||
| 8 | #include <asm/page.h> | |
| 9 | ||
| 10 | /* Page of kernel code accessible to userspace. */ | |
| 11 | #define USER_GATEWAY_PAGE 0x6ffff000 | |
| 12 | /* Offset of TLS pointer array in gateway page. */ | |
| 13 | #define USER_GATEWAY_TLS 0x100 | |
| 14 | ||
| 15 | #ifndef __ASSEMBLY__ | |
| 16 | ||
| 17 | extern char __user_gateway_start; | |
| 18 | extern char __user_gateway_end; | |
| 19 | ||
| 20 | /* Kernel mapping of the gateway page. */ | |
| 21 | extern void *gateway_page; | |
| 22 | ||
| 23 | static inline void set_gateway_tls(void __user *tls_ptr) | |
| 24 | { | |
| 25 | void **gateway_tls = (void **)(gateway_page + USER_GATEWAY_TLS + | |
| 26 | hard_processor_id() * 4); | |
| 27 | ||
| 28 | *gateway_tls = (__force void *)tls_ptr; | |
| 29 | #ifdef CONFIG_METAG_META12 | |
| 30 | /* Avoid cache aliases on virtually tagged cache. */ | |
| 31 | __builtin_dcache_flush((void *)USER_GATEWAY_PAGE + USER_GATEWAY_TLS + | |
| 32 | hard_processor_id() * sizeof(void *)); | |
| 33 | #endif | |
| 34 | } | |
| 35 | ||
| 36 | extern int __kuser_get_tls(void); | |
| 37 | extern char *__kuser_get_tls_end[]; | |
| 38 | ||
| 39 | extern int __kuser_cmpxchg(int, int, unsigned long *); | |
| 40 | extern char *__kuser_cmpxchg_end[]; | |
| 41 | ||
| 42 | #endif | |
| 43 | ||
| 44 | #endif |