| Tony Lindgren | f159f4e | 2010-07-05 14:53:10 +0100 | [diff] [blame] | 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 |
| Russell King | 37bc618 | 2011-01-17 16:38:56 +0000 | [diff] [blame] | 31 | #elif defined(CONFIG_CPU_V6) |
| Tony Lindgren | f159f4e | 2010-07-05 14:53:10 +0100 | [diff] [blame] | 32 | #define tls_emu 0 |
| 33 | #define has_tls_reg (elf_hwcap & HWCAP_TLS) |
| 34 | #define set_tls set_tls_v6 |
| Russell King | 37bc618 | 2011-01-17 16:38:56 +0000 | [diff] [blame] | 35 | #elif defined(CONFIG_CPU_32v6K) |
| 36 | #define tls_emu 0 |
| 37 | #define has_tls_reg 1 |
| 38 | #define set_tls set_tls_v6k |
| Tony Lindgren | f159f4e | 2010-07-05 14:53:10 +0100 | [diff] [blame] | 39 | #else |
| 40 | #define tls_emu 0 |
| 41 | #define has_tls_reg 0 |
| 42 | #define set_tls set_tls_software |
| 43 | #endif |
| 44 | |
| 45 | #endif /* __ASMARM_TLS_H */ |