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
29 extern int kvmppc_44x_emul_tlbsx(struct kvm_vcpu *vcpu, u8 rt, u8 ra, u8 rb,
30 u8 rc);
31 extern int kvmppc_44x_emul_tlbwe(struct kvm_vcpu *vcpu, u8 ra, u8 rs, u8 ws);
32
33 /* TLB helper functions */
get_tlb_size(const struct kvmppc_44x_tlbe * tlbe)34 static inline unsigned int get_tlb_size(const struct kvmppc_44x_tlbe *tlbe)
35 {
36 return (tlbe->word0 >> 4) & 0xf;
37 }
38
get_tlb_eaddr(const struct kvmppc_44x_tlbe * tlbe)39 static inline gva_t get_tlb_eaddr(const struct kvmppc_44x_tlbe *tlbe)
40 {
41 return tlbe->word0 & 0xfffffc00;
42 }
43
get_tlb_bytes(const struct kvmppc_44x_tlbe * tlbe)44 static inline gva_t get_tlb_bytes(const struct kvmppc_44x_tlbe *tlbe)
45 {
46 unsigned int pgsize = get_tlb_size(tlbe);
47 return 1 << 10 << (pgsize << 1);
48 }
49
get_tlb_end(const struct kvmppc_44x_tlbe * tlbe)50 static inline gva_t get_tlb_end(const struct kvmppc_44x_tlbe *tlbe)
51 {
52 return get_tlb_eaddr(tlbe) + get_tlb_bytes(tlbe) - 1;
53 }
54
get_tlb_raddr(const struct kvmppc_44x_tlbe * tlbe)55 static inline u64 get_tlb_raddr(const struct kvmppc_44x_tlbe *tlbe)
56 {
57 u64 word1 = tlbe->word1;
58 return ((word1 & 0xf) << 32) | (word1 & 0xfffffc00);
59 }
60
get_tlb_tid(const struct kvmppc_44x_tlbe * tlbe)61 static inline unsigned int get_tlb_tid(const struct kvmppc_44x_tlbe *tlbe)
62 {
63 return tlbe->tid & 0xff;
64 }
65
get_tlb_ts(const struct kvmppc_44x_tlbe * tlbe)66 static inline unsigned int get_tlb_ts(const struct kvmppc_44x_tlbe *tlbe)
67 {
68 return (tlbe->word0 >> 8) & 0x1;
69 }
70
get_tlb_v(const struct kvmppc_44x_tlbe * tlbe)71 static inline unsigned int get_tlb_v(const struct kvmppc_44x_tlbe *tlbe)
72 {
73 return (tlbe->word0 >> 9) & 0x1;
74 }
75
get_mmucr_stid(const struct kvm_vcpu * vcpu)76 static inline unsigned int get_mmucr_stid(const struct kvm_vcpu *vcpu)
77 {
78 return vcpu->arch.mmucr & 0xff;
79 }
80
get_mmucr_sts(const struct kvm_vcpu * vcpu)81 static inline unsigned int get_mmucr_sts(const struct kvm_vcpu *vcpu)
82 {
83 return (vcpu->arch.mmucr >> 16) & 0x1;
84 }
85
86 #endif /* __KVM_POWERPC_TLB_H__ */
87