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| author | Jiri Kosina <jkosina@suse.cz> | 2010-08-04 17:14:38 +0400 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2010-08-04 17:14:38 +0400 |
| commit | d790d4d583aeaed9fc6f8a9f4d9f8ce6b1c15c7f (patch) | |
| tree | 854ab394486288d40fa8179cbfaf66e8bdc44b0f /arch/arm/include/asm/tls.h | |
| parent | 73b2c7165b76b20eb1290e7efebc33cfd21db1ca (diff) | |
| parent | 3a09b1be53d23df780a0cd0e4087a05e2ca4a00c (diff) | |
| download | linux-d790d4d583aeaed9fc6f8a9f4d9f8ce6b1c15c7f.tar.xz | |
Merge branch 'master' into for-next
Diffstat (limited to 'arch/arm/include/asm/tls.h')
| -rw-r--r-- | arch/arm/include/asm/tls.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/arch/arm/include/asm/tls.h b/arch/arm/include/asm/tls.h new file mode 100644 index 000000000000..e71d6ff8d104 --- /dev/null +++ b/arch/arm/include/asm/tls.h @@ -0,0 +1,46 @@ +#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 + .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 + 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 __LINUX_ARM_ARCH__ >= 7 || \ + (__LINUX_ARM_ARCH__ == 6 && defined(CONFIG_CPU_32v6K)) +#define tls_emu 0 +#define has_tls_reg 1 +#define set_tls set_tls_v6k +#elif __LINUX_ARM_ARCH__ == 6 +#define tls_emu 0 +#define has_tls_reg (elf_hwcap & HWCAP_TLS) +#define set_tls set_tls_v6 +#else +#define tls_emu 0 +#define has_tls_reg 0 +#define set_tls set_tls_software +#endif + +#endif /* __ASMARM_TLS_H */ |