diff options
Diffstat (limited to 'sys/powerpc/aim/moea64_native.c')
| -rw-r--r-- | sys/powerpc/aim/moea64_native.c | 45 |
1 files changed, 17 insertions, 28 deletions
diff --git a/sys/powerpc/aim/moea64_native.c b/sys/powerpc/aim/moea64_native.c index 93187ca..41e8593 100644 --- a/sys/powerpc/aim/moea64_native.c +++ b/sys/powerpc/aim/moea64_native.c @@ -133,36 +133,31 @@ __FBSDID("$FreeBSD$"); #define VSID_HASH_MASK 0x0000007fffffffffULL -/* - * The tlbie instruction must be executed in 64-bit mode - * so we have to twiddle MSR[SF] around every invocation. - * Just to add to the fun, exceptions must be off as well - * so that we can't trap in 64-bit mode. What a pain. - */ -static struct mtx tlbie_mutex; - static __inline void TLBIE(uint64_t vpn) { #ifndef __powerpc64__ register_t vpn_hi, vpn_lo; register_t msr; - register_t scratch; + register_t scratch, intr; #endif + static volatile u_int tlbie_lock = 0; + vpn <<= ADDR_PIDX_SHFT; vpn &= ~(0xffffULL << 48); + /* Hobo spinlock: we need stronger guarantees than mutexes provide */ + while (!atomic_cmpset_int(&tlbie_lock, 0, 1)); + isync(); /* Flush instruction queue once lock acquired */ + #ifdef __powerpc64__ - mtx_lock(&tlbie_mutex); __asm __volatile("tlbie %0" :: "r"(vpn) : "memory"); - mtx_unlock(&tlbie_mutex); - __asm __volatile("eieio; tlbsync; ptesync"); + __asm __volatile("eieio; tlbsync; ptesync" ::: "memory"); #else vpn_hi = (uint32_t)(vpn >> 32); vpn_lo = (uint32_t)vpn; - /* Note: spin mutex is to disable exceptions while fiddling MSR */ - mtx_lock_spin(&tlbie_mutex); + intr = intr_disable(); __asm __volatile("\ mfmsr %0; \ mr %1, %0; \ @@ -179,8 +174,11 @@ TLBIE(uint64_t vpn) { ptesync;" : "=r"(msr), "=r"(scratch) : "r"(vpn_hi), "r"(vpn_lo), "r"(32), "r"(1) : "memory"); - mtx_unlock_spin(&tlbie_mutex); + intr_enable(); #endif + + /* No barriers or special ops -- taken care of by ptesync above */ + tlbie_lock = 0; } #define DISABLE_TRANS(msr) msr = mfmsr(); mtmsr(msr & ~PSL_DR) @@ -261,9 +259,9 @@ moea64_pte_clear_native(mmu_t mmu, uintptr_t pt_cookie, struct lpte *pvo_pt, * As shown in Section 7.6.3.2.3 */ pt->pte_lo &= ~ptebit; - sched_pin(); + critical_enter(); TLBIE(vpn); - sched_unpin(); + critical_exit(); } static void @@ -297,12 +295,12 @@ moea64_pte_unset_native(mmu_t mmu, uintptr_t pt_cookie, struct lpte *pvo_pt, * Invalidate the pte. */ isync(); - sched_pin(); + critical_enter(); pvo_pt->pte_hi &= ~LPTE_VALID; pt->pte_hi &= ~LPTE_VALID; PTESYNC(); TLBIE(vpn); - sched_unpin(); + critical_exit(); /* * Save the reg & chg bits. @@ -405,15 +403,6 @@ moea64_bootstrap_native(mmu_t mmup, vm_offset_t kernelstart, CTR1(KTR_PMAP, "moea64_bootstrap: PTEG table at %p", moea64_pteg_table); - /* - * Initialize the TLBIE lock. TLBIE can only be executed by one CPU. - */ -#ifdef __powerpc64__ - mtx_init(&tlbie_mutex, "tlbie", NULL, MTX_DEF); -#else - mtx_init(&tlbie_mutex, "tlbie", NULL, MTX_SPIN); -#endif - moea64_mid_bootstrap(mmup, kernelstart, kernelend); /* |
