| Hollis Blanchard | bbf45ba | 2008-04-16 23:28:09 -0500 | [diff] [blame] | 1 | /* |
| 2 | * This program is free software; you can redistribute it and/or modify |
| 3 | * it under the terms of the GNU General Public License, version 2, as |
| 4 | * published by the Free Software Foundation. |
| 5 | * |
| 6 | * This program is distributed in the hope that it will be useful, |
| 7 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 8 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 9 | * GNU General Public License for more details. |
| 10 | * |
| 11 | * You should have received a copy of the GNU General Public License |
| 12 | * along with this program; if not, write to the Free Software |
| 13 | * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 14 | * |
| 15 | * Copyright IBM Corp. 2007 |
| 16 | * |
| 17 | * Authors: Hollis Blanchard <hollisb@us.ibm.com> |
| 18 | */ |
| 19 | |
| 20 | #ifndef __KVM_POWERPC_TLB_H__ |
| 21 | #define __KVM_POWERPC_TLB_H__ |
| 22 | |
| 23 | #include <linux/kvm_host.h> |
| 24 | #include <asm/mmu-44x.h> |
| 25 | |
| 26 | extern int kvmppc_44x_tlb_index(struct kvm_vcpu *vcpu, gva_t eaddr, |
| 27 | unsigned int pid, unsigned int as); |
| 28 | extern struct tlbe *kvmppc_44x_dtlb_search(struct kvm_vcpu *vcpu, gva_t eaddr); |
| 29 | extern struct tlbe *kvmppc_44x_itlb_search(struct kvm_vcpu *vcpu, gva_t eaddr); |
| 30 | |
| 31 | /* TLB helper functions */ |
| 32 | static inline unsigned int get_tlb_size(const struct tlbe *tlbe) |
| 33 | { |
| 34 | return (tlbe->word0 >> 4) & 0xf; |
| 35 | } |
| 36 | |
| 37 | static inline gva_t get_tlb_eaddr(const struct tlbe *tlbe) |
| 38 | { |
| 39 | return tlbe->word0 & 0xfffffc00; |
| 40 | } |
| 41 | |
| 42 | static inline gva_t get_tlb_bytes(const struct tlbe *tlbe) |
| 43 | { |
| 44 | unsigned int pgsize = get_tlb_size(tlbe); |
| 45 | return 1 << 10 << (pgsize << 1); |
| 46 | } |
| 47 | |
| 48 | static inline gva_t get_tlb_end(const struct tlbe *tlbe) |
| 49 | { |
| 50 | return get_tlb_eaddr(tlbe) + get_tlb_bytes(tlbe) - 1; |
| 51 | } |
| 52 | |
| 53 | static inline u64 get_tlb_raddr(const struct tlbe *tlbe) |
| 54 | { |
| 55 | u64 word1 = tlbe->word1; |
| 56 | return ((word1 & 0xf) << 32) | (word1 & 0xfffffc00); |
| 57 | } |
| 58 | |
| 59 | static inline unsigned int get_tlb_tid(const struct tlbe *tlbe) |
| 60 | { |
| 61 | return tlbe->tid & 0xff; |
| 62 | } |
| 63 | |
| 64 | static inline unsigned int get_tlb_ts(const struct tlbe *tlbe) |
| 65 | { |
| 66 | return (tlbe->word0 >> 8) & 0x1; |
| 67 | } |
| 68 | |
| 69 | static inline unsigned int get_tlb_v(const struct tlbe *tlbe) |
| 70 | { |
| 71 | return (tlbe->word0 >> 9) & 0x1; |
| 72 | } |
| 73 | |
| 74 | static inline unsigned int get_mmucr_stid(const struct kvm_vcpu *vcpu) |
| 75 | { |
| 76 | return vcpu->arch.mmucr & 0xff; |
| 77 | } |
| 78 | |
| 79 | static inline unsigned int get_mmucr_sts(const struct kvm_vcpu *vcpu) |
| 80 | { |
| 81 | return (vcpu->arch.mmucr >> 16) & 0x1; |
| 82 | } |
| 83 | |
| 84 | static inline gpa_t tlb_xlate(struct tlbe *tlbe, gva_t eaddr) |
| 85 | { |
| 86 | unsigned int pgmask = get_tlb_bytes(tlbe) - 1; |
| 87 | |
| 88 | return get_tlb_raddr(tlbe) | (eaddr & pgmask); |
| 89 | } |
| 90 | |
| 91 | #endif /* __KVM_POWERPC_TLB_H__ */ |