diff options
Diffstat (limited to 'arch/arm/include/asm/tls.h')
-rw-r--r-- | arch/arm/include/asm/tls.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/arch/arm/include/asm/tls.h b/arch/arm/include/asm/tls.h new file mode 100644 index 000000000000..e71d6ff8d104 --- /dev/null +++ b/arch/arm/include/asm/tls.h | |||
@@ -0,0 +1,46 @@ | |||
1 | #ifndef __ASMARM_TLS_H | ||
2 | #define __ASMARM_TLS_H | ||
3 | |||
4 | #ifdef __ASSEMBLY__ | ||
5 | .macro set_tls_none, tp, tmp1, tmp2 | ||
6 | .endm | ||
7 | |||
8 | .macro set_tls_v6k, tp, tmp1, tmp2 | ||
9 | mcr p15, 0, \tp, c13, c0, 3 @ set TLS register | ||
10 | .endm | ||
11 | |||
12 | .macro set_tls_v6, tp, tmp1, tmp2 | ||
13 | ldr \tmp1, =elf_hwcap | ||
14 | ldr \tmp1, [\tmp1, #0] | ||
15 | mov \tmp2, #0xffff0fff | ||
16 | tst \tmp1, #HWCAP_TLS @ hardware TLS available? | ||
17 | mcrne p15, 0, \tp, c13, c0, 3 @ yes, set TLS register | ||
18 | streq \tp, [\tmp2, #-15] @ set TLS value at 0xffff0ff0 | ||
19 | .endm | ||
20 | |||
21 | .macro set_tls_software, tp, tmp1, tmp2 | ||
22 | mov \tmp1, #0xffff0fff | ||
23 | str \tp, [\tmp1, #-15] @ set TLS value at 0xffff0ff0 | ||
24 | .endm | ||
25 | #endif | ||
26 | |||
27 | #ifdef CONFIG_TLS_REG_EMUL | ||
28 | #define tls_emu 1 | ||
29 | #define has_tls_reg 1 | ||
30 | #define set_tls set_tls_none | ||
31 | #elif __LINUX_ARM_ARCH__ >= 7 || \ | ||
32 | (__LINUX_ARM_ARCH__ == 6 && defined(CONFIG_CPU_32v6K)) | ||
33 | #define tls_emu 0 | ||
34 | #define has_tls_reg 1 | ||
35 | #define set_tls set_tls_v6k | ||
36 | #elif __LINUX_ARM_ARCH__ == 6 | ||
37 | #define tls_emu 0 | ||
38 | #define has_tls_reg (elf_hwcap & HWCAP_TLS) | ||
39 | #define set_tls set_tls_v6 | ||
40 | #else | ||
41 | #define tls_emu 0 | ||
42 | #define has_tls_reg 0 | ||
43 | #define set_tls set_tls_software | ||
44 | #endif | ||
45 | |||
46 | #endif /* __ASMARM_TLS_H */ | ||