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Tony Lindgrenf159f4e2010-07-05 14:53:10 +01001#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 */