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 */ 50