1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
#ifndef __ASMARM_TLS_H
#define __ASMARM_TLS_H
#ifdef __ASSEMBLY__
.macro set_tls_none, tp, tmp1, tmp2
.endm
.macro set_tls_v6k, tp, tmp1, tmp2
mcr p15, 0, \tp, c13, c0, 3 @ set TLS register
mov \tmp1, #0xffff0fff
str \tp, [\tmp1, #-15] @ set TLS value at 0xffff0ff0
.endm
.macro set_tls_v6, tp, tmp1, tmp2
ldr \tmp1, =elf_hwcap
ldr \tmp1, [\tmp1, #0]
mov \tmp2, #0xffff0fff
tst \tmp1, #HWCAP_TLS @ hardware TLS available?
mcrne p15, 0, \tp, c13, c0, 3 @ yes, set TLS register
str \tp, [\tmp2, #-15] @ set TLS value at 0xffff0ff0
.endm
.macro set_tls_software, tp, tmp1, tmp2
mov \tmp1, #0xffff0fff
str \tp, [\tmp1, #-15] @ set TLS value at 0xffff0ff0
.endm
#endif
#ifdef CONFIG_TLS_REG_EMUL
#define tls_emu 1
#define has_tls_reg 1
#define set_tls set_tls_none
#elif __LINUX_ARM_ARCH__ >= 7 || \
(__LINUX_ARM_ARCH__ == 6 && defined(CONFIG_CPU_32v6K))
#define tls_emu 0
#define has_tls_reg 1
#define set_tls set_tls_v6k
#elif __LINUX_ARM_ARCH__ == 6
#define tls_emu 0
#define has_tls_reg (elf_hwcap & HWCAP_TLS)
#define set_tls set_tls_v6
#else
#define tls_emu 0
#define has_tls_reg 0
#define set_tls set_tls_software
#endif
#endif /* __ASMARM_TLS_H */
|
