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 mov \tmp1, #0
11 mcr p15, 0, \tmp1, c13, c0, 2 @ clear user r/w TLS register
12 .endm
13
14 .macro set_tls_v6, tp, tmp1, tmp2
15 ldr \tmp1, =elf_hwcap
16 ldr \tmp1, [\tmp1, #0]
17 mov \tmp2, #0xffff0fff
18 tst \tmp1, #HWCAP_TLS @ hardware TLS available?
19 mcrne p15, 0, \tp, c13, c0, 3 @ yes, set TLS register
20 movne \tmp1, #0
21 mcrne p15, 0, \tmp1, c13, c0, 2 @ clear user r/w TLS register
22 streq \tp, [\tmp2, #-15] @ set TLS value at 0xffff0ff0
23 .endm
24
25 .macro set_tls_software, tp, tmp1, tmp2
26 mov \tmp1, #0xffff0fff
27 str \tp, [\tmp1, #-15] @ set TLS value at 0xffff0ff0
28 .endm
29#endif
30
31#ifdef CONFIG_TLS_REG_EMUL
32#define tls_emu 1
33#define has_tls_reg 1
34#define set_tls set_tls_none
35#elif defined(CONFIG_CPU_V6)
36#define tls_emu 0
37#define has_tls_reg (elf_hwcap & HWCAP_TLS)
38#define set_tls set_tls_v6
39#elif defined(CONFIG_CPU_32v6K)
40#define tls_emu 0
41#define has_tls_reg 1
42#define set_tls set_tls_v6k
43#else
44#define tls_emu 0
45#define has_tls_reg 0
46#define set_tls set_tls_software
47#endif
48
49#endif
50
