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| author | Kevin Cernekee <cernekee@gmail.com> | 2010-10-16 14:22:38 -0700 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2010-10-29 19:08:53 +0100 |
| commit | 18d693b3598fdebdd5c65a613221793456a7ce45 (patch) | |
| tree | bdec7d15eb2ba774292358b2a617965ab3ff4530 /arch | |
| parent | ea31a6b203710c03d1fc025377a19572e620588a (diff) | |
| download | lwn-18d693b3598fdebdd5c65a613221793456a7ce45.tar.gz lwn-18d693b3598fdebdd5c65a613221793456a7ce45.zip | |
MIPS: Allow UserLocal on MIPS_R1 processors
Some MIPS32R1 processors implement UserLocal (RDHWR $29) to accelerate
programs that make extensive use of thread-local storage. Therefore,
setting up the HWRENA register should not depend on cpu_has_mips_r2.
Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/kernel/traps.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c index 8d79b8774b30..8e9fbe75894e 100644 --- a/arch/mips/kernel/traps.c +++ b/arch/mips/kernel/traps.c @@ -1481,6 +1481,7 @@ void __cpuinit per_cpu_trap_init(void) { unsigned int cpu = smp_processor_id(); unsigned int status_set = ST0_CU0; + unsigned int hwrena = cpu_hwrena_impl_bits; #ifdef CONFIG_MIPS_MT_SMTC int secondaryTC = 0; int bootTC = (cpu == 0); @@ -1513,14 +1514,14 @@ void __cpuinit per_cpu_trap_init(void) change_c0_status(ST0_CU|ST0_MX|ST0_RE|ST0_FR|ST0_BEV|ST0_TS|ST0_KX|ST0_SX|ST0_UX, status_set); - if (cpu_has_mips_r2) { - unsigned int enable = 0x0000000f | cpu_hwrena_impl_bits; + if (cpu_has_mips_r2) + hwrena |= 0x0000000f; - if (!noulri && cpu_has_userlocal) - enable |= (1 << 29); + if (!noulri && cpu_has_userlocal) + hwrena |= (1 << 29); - write_c0_hwrena(enable); - } + if (hwrena) + write_c0_hwrena(hwrena); #ifdef CONFIG_MIPS_MT_SMTC if (!secondaryTC) { |