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f159f4ed TL |
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 */ |