From 18d693b3598fdebdd5c65a613221793456a7ce45 Mon Sep 17 00:00:00 2001 From: Kevin Cernekee Date: Sat, 16 Oct 2010 14:22:38 -0700 Subject: [PATCH] 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 Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org --- arch/mips/kernel/traps.c | 13 +++++++------ 1 file 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) { -- 2.20.1