tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 defined(CONFIG_CPU_V6)
32#define tls_emu 0
33#define has_tls_reg (elf_hwcap & HWCAP_TLS)
34#define set_tls set_tls_v6
35#elif defined(CONFIG_CPU_32v6K)
36#define tls_emu 0
37#define has_tls_reg 1
38#define set_tls set_tls_v6k
39#else
40#define tls_emu 0
41#define has_tls_reg 0
42#define set_tls set_tls_software
43#endif
44
45#endif /* __ASMARM_TLS_H */