diff options
Diffstat (limited to 'arch/arm/vfp')
| -rw-r--r-- | arch/arm/vfp/vfpmodule.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c index f08eafbddcc..e26cc1f5994 100644 --- a/arch/arm/vfp/vfpmodule.c +++ b/arch/arm/vfp/vfpmodule.c @@ -263,13 +263,24 @@ void VFP9_bounce(u32 trigger, u32 fpexc, struct pt_regs *regs) if (exceptions) vfp_raise_exceptions(exceptions, trigger, orig_fpscr, regs); } - + /* * VFP support code initialisation. */ static int __init vfp_init(void) { unsigned int vfpsid; + unsigned int cpu_arch = cpu_architecture(); + u32 access = 0; + + if (cpu_arch >= CPU_ARCH_ARMv6) { + access = get_copro_access(); + + /* + * Enable full access to VFP (cp10 and cp11) + */ + set_copro_access(access | CPACC_FULL(10) | CPACC_FULL(11)); + } /* * First check that there is a VFP that we can use. @@ -281,6 +292,12 @@ static int __init vfp_init(void) printk(KERN_INFO "VFP support v0.3: "); if (VFP_arch) { printk("not present\n"); + + /* + * Restore the copro access register. + */ + if (cpu_arch >= CPU_ARCH_ARMv6) + set_copro_access(access); } else if (vfpsid & FPSID_NODOUBLE) { printk("no double precision support\n"); } else { @@ -291,9 +308,16 @@ static int __init vfp_init(void) (vfpsid & FPSID_PART_MASK) >> FPSID_PART_BIT, (vfpsid & FPSID_VARIANT_MASK) >> FPSID_VARIANT_BIT, (vfpsid & FPSID_REV_MASK) >> FPSID_REV_BIT); + vfp_vector = vfp_support_entry; thread_register_notifier(&vfp_notifier_block); + + /* + * We detected VFP, and the support code is + * in place; report VFP support to userspace. + */ + elf_hwcap |= HWCAP_VFP; } return 0; } |