tls.h

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#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, #0
    mcr p15, 0, \tmp1, c13, c0, 2   @ clear user r/w TLS register
    .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
    movne	\tmp1, #0
    mcrne   p15, 0, \tmp1, c13, c0, 2   @ clear user r/w TLS register
    streq   \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 defined(CONFIG_CPU_V6)
#define tls_emu     0
#define has_tls_reg     (elf_hwcap & HWCAP_TLS)
#define set_tls     set_tls_v6
#elif defined(CONFIG_CPU_32v6K)
#define tls_emu     0
#define has_tls_reg     1
#define set_tls     set_tls_v6k
#else
#define tls_emu     0
#define has_tls_reg     0
#define set_tls     set_tls_software
#endif

#endif  /* __ASMARM_TLS_H */