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	/* __ASMARM_TLS_H */

 1#ifndef __ASMARM_TLS_H
 2#define __ASMARM_TLS_H
 3
 4#ifdef __ASSEMBLY__
 5#include <asm/asm-offsets.h>
 6	.macro switch_tls_none, base, tp, tpuser, tmp1, tmp2
 7	.endm
 8
 9	.macro switch_tls_v6k, base, tp, tpuser, tmp1, tmp2
10	mrc	p15, 0, \tmp2, c13, c0, 2	@ get the user r/w register
11	mcr	p15, 0, \tp, c13, c0, 3		@ set TLS register
12	mcr	p15, 0, \tpuser, c13, c0, 2	@ and the user r/w register
13	str	\tmp2, [\base, #TI_TP_VALUE + 4] @ save it
14	.endm
15
16	.macro switch_tls_v6, base, tp, tpuser, tmp1, tmp2
17	ldr	\tmp1, =elf_hwcap
18	ldr	\tmp1, [\tmp1, #0]
19	mov	\tmp2, #0xffff0fff
20	tst	\tmp1, #HWCAP_TLS		@ hardware TLS available?
 
 
 
21	streq	\tp, [\tmp2, #-15]		@ set TLS value at 0xffff0ff0
22	mrcne	p15, 0, \tmp2, c13, c0, 2	@ get the user r/w register
23	mcrne	p15, 0, \tp, c13, c0, 3		@ yes, set TLS register
24	mcrne	p15, 0, \tpuser, c13, c0, 2	@ set user r/w register
25	strne	\tmp2, [\base, #TI_TP_VALUE + 4] @ save it
26	.endm
27
28	.macro switch_tls_software, base, tp, tpuser, tmp1, tmp2
29	mov	\tmp1, #0xffff0fff
30	str	\tp, [\tmp1, #-15]		@ set TLS value at 0xffff0ff0
31	.endm
32#endif
33
34#ifdef CONFIG_TLS_REG_EMUL
35#define tls_emu		1
36#define has_tls_reg		1
37#define switch_tls	switch_tls_none
38#elif defined(CONFIG_CPU_V6)
39#define tls_emu		0
40#define has_tls_reg		(elf_hwcap & HWCAP_TLS)
41#define switch_tls	switch_tls_v6
42#elif defined(CONFIG_CPU_32v6K)
43#define tls_emu		0
44#define has_tls_reg		1
45#define switch_tls	switch_tls_v6k
46#else
47#define tls_emu		0
48#define has_tls_reg		0
49#define switch_tls	switch_tls_software
50#endif
51
52#ifndef __ASSEMBLY__
53static inline unsigned long get_tpuser(void)
54{
55	unsigned long reg = 0;
56
57	if (has_tls_reg && !tls_emu)
58		__asm__("mrc p15, 0, %0, c13, c0, 2" : "=r" (reg));
59
60	return reg;
61}
62#endif
63#endif	/* __ASMARM_TLS_H */