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