[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / arm / include / asm / tls.h

#ifndef __ASMARM_TLS_H
#define __ASMARM_TLS_H

#ifdef __ASSEMBLY__
#include <asm/asm-offsets.h>
	.macro switch_tls_none, prev, next, tp, tpuser, tmp1, tmp2
	.endm

	.macro switch_tls_v6k, prev, next, tp, tpuser, tmp1, tmp2
	ldrd	\tp, \tpuser, [\next, #TI_TP_VALUE]	@ get the next TLS and user r/w register
	mrc	p15, 0, \tmp2, c13, c0, 2	@ get the user r/w register
	mcr	p15, 0, \tp, c13, c0, 3		@ set TLS register
	mcr	p15, 0, \tpuser, c13, c0, 2	@ and the user r/w register
	str	\tmp2, [\prev, #TI_TP_VALUE + 4] @ save it
	.endm

	.macro switch_tls_v6, prev, next, tp, tpuser, tmp1, tmp2
	ldr	\tmp1, =elf_hwcap
	ldr	\tmp1, [\tmp1, #0]
	mov	\tmp2, #0xffff0fff
	ldr	\tp, [\next, #TI_TP_VALUE]	@ get the next TLS register
	tst	\tmp1, #HWCAP_TLS		@ hardware TLS available?
	streq	\tp, [\tmp2, #-15]		@ set TLS value at 0xffff0ff0
	mrcne	p15, 0, \tmp2, c13, c0, 2	@ get the previous user r/w register
	ldrne	\tpuser, [\next, #TI_TP_VALUE + 4]	@ get the next user r/w register
	mcrne	p15, 0, \tp, c13, c0, 3		@ yes, set TLS register
	mcrne	p15, 0, \tpuser, c13, c0, 2	@ set user r/w register
	strne	\tmp2, [\prev, #TI_TP_VALUE + 4] @ save it
	.endm

	.macro switch_tls_software, prev, next, tp, tpuser, 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 switch_tls	switch_tls_none
#elif defined(CONFIG_CPU_V6)
#define tls_emu		0
#define has_tls_reg		(elf_hwcap & HWCAP_TLS)
#define switch_tls	switch_tls_v6
#elif defined(CONFIG_CPU_32v6K)
#define tls_emu		0
#define has_tls_reg		1
#define switch_tls	switch_tls_v6k
#else
#define tls_emu		0
#define has_tls_reg		0
#define switch_tls	switch_tls_software
#endif

#ifndef __ASSEMBLY__
static inline unsigned long get_tpuser(void)
{
	unsigned long reg = 0;

	if (has_tls_reg && !tls_emu)
		__asm__("mrc p15, 0, %0, c13, c0, 2" : "=r" (reg));

	return reg;
}
#endif
#endif	/* __ASMARM_TLS_H */
Commit	Line	Data
f159f4ed TL	1	#ifndef __ASMARM_TLS_H
	2	#define __ASMARM_TLS_H
	3
	4	#ifdef __ASSEMBLY__
4b9e9796 S	5	#include <asm/asm-offsets.h>
4b9e9796 S	6	.macro switch_tls_none, prev, next, tp, tpuser, tmp1, tmp2
f159f4ed TL	7	.endm
f159f4ed TL	8
4b9e9796 S	9	.macro switch_tls_v6k, prev, next, tp, tpuser, tmp1, tmp2
	10	ldrd \tp, \tpuser, [\next, #TI_TP_VALUE] @ get the next TLS and user r/w register
	11	mrc p15, 0, \tmp2, c13, c0, 2 @ get the user r/w register
f159f4ed	12	mcr p15, 0, \tp, c13, c0, 3 @ set TLS register
4b9e9796 S	13	mcr p15, 0, \tpuser, c13, c0, 2 @ and the user r/w register
4b9e9796 S	14	str \tmp2, [\prev, #TI_TP_VALUE + 4] @ save it
f159f4ed TL	15	.endm
f159f4ed TL	16
4b9e9796	17	.macro switch_tls_v6, prev, next, tp, tpuser, tmp1, tmp2
f159f4ed TL	18	ldr \tmp1, =elf_hwcap
	19	ldr \tmp1, [\tmp1, #0]
	20	mov \tmp2, #0xffff0fff
4b9e9796	21	ldr \tp, [\next, #TI_TP_VALUE] @ get the next TLS register
f159f4ed	22	tst \tmp1, #HWCAP_TLS @ hardware TLS available?
f159f4ed	23	streq \tp, [\tmp2, #-15] @ set TLS value at 0xffff0ff0
4b9e9796 S	24	mrcne p15, 0, \tmp2, c13, c0, 2 @ get the previous user r/w register
	25	ldrne \tpuser, [\next, #TI_TP_VALUE + 4] @ get the next user r/w register
	26	mcrne p15, 0, \tp, c13, c0, 3 @ yes, set TLS register
	27	mcrne p15, 0, \tpuser, c13, c0, 2 @ set user r/w register
	28	strne \tmp2, [\prev, #TI_TP_VALUE + 4] @ save it
f159f4ed TL	29	.endm
f159f4ed TL	30
4b9e9796	31	.macro switch_tls_software, prev, next, tp, tpuser, tmp1, tmp2
f159f4ed TL	32	mov \tmp1, #0xffff0fff
	33	str \tp, [\tmp1, #-15] @ set TLS value at 0xffff0ff0
	34	.endm
	35	#endif
	36
	37	#ifdef CONFIG_TLS_REG_EMUL
	38	#define tls_emu 1
	39	#define has_tls_reg 1
4b9e9796	40	#define switch_tls switch_tls_none
37bc618f	41	#elif defined(CONFIG_CPU_V6)
f159f4ed TL	42	#define tls_emu 0
f159f4ed TL	43	#define has_tls_reg (elf_hwcap & HWCAP_TLS)
4b9e9796	44	#define switch_tls switch_tls_v6
37bc618f RK	45	#elif defined(CONFIG_CPU_32v6K)
	46	#define tls_emu 0
	47	#define has_tls_reg 1
4b9e9796	48	#define switch_tls switch_tls_v6k
f159f4ed TL	49	#else
	50	#define tls_emu 0
	51	#define has_tls_reg 0
4b9e9796	52	#define switch_tls switch_tls_software
f159f4ed TL	53	#endif
f159f4ed TL	54
4b9e9796 S	55	#ifndef __ASSEMBLY__
	56	static inline unsigned long get_tpuser(void)
	57	{
	58	unsigned long reg = 0;
	59
	60	if (has_tls_reg && !tls_emu)
	61	__asm__("mrc p15, 0, %0, c13, c0, 2" : "=r" (reg));
	62
	63	return reg;
	64	}
	65	#endif
f159f4ed	66	#endif /* __ASMARM_TLS_H */