tls.h revision f159f4ed55bb0fa5470800641e03a13a7e0eae6e 
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 */
47