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 int kvmppc_44x_dtlb_index(struct kvm_vcpu *vcpu, gva_t eaddr);
29 extern int kvmppc_44x_itlb_index(struct kvm_vcpu *vcpu, gva_t eaddr);
30
31 extern int kvmppc_44x_emul_tlbsx(struct kvm_vcpu *vcpu, u8 rt, u8 ra, u8 rb,
32 u8 rc);
33 extern int kvmppc_44x_emul_tlbwe(struct kvm_vcpu *vcpu, u8 ra, u8 rs, u8 ws);
34
35 /* TLB helper functions */
get_tlb_size(const struct kvmppc_44x_tlbe * tlbe)36 static inline unsigned int get_tlb_size(const struct kvmppc_44x_tlbe *tlbe)
37 {
38 return (tlbe->word0 >> 4) & 0xf;
39 }
40
get_tlb_eaddr(const struct kvmppc_44x_tlbe * tlbe)41 static inline gva_t get_tlb_eaddr(const struct kvmppc_44x_tlbe *tlbe)
42 {
43 return tlbe->word0 & 0xfffffc00;
44 }
45
get_tlb_bytes(const struct kvmppc_44x_tlbe * tlbe)46 static inline gva_t get_tlb_bytes(const struct kvmppc_44x_tlbe *tlbe)
47 {
48 unsigned int pgsize = get_tlb_size(tlbe);
49 return 1 << 10 << (pgsize << 1);
50 }
51
get_tlb_end(const struct kvmppc_44x_tlbe * tlbe)52 static inline gva_t get_tlb_end(const struct kvmppc_44x_tlbe *tlbe)
53 {
54 return get_tlb_eaddr(tlbe) + get_tlb_bytes(tlbe) - 1;
55 }
56
get_tlb_raddr(const struct kvmppc_44x_tlbe * tlbe)57 static inline u64 get_tlb_raddr(const struct kvmppc_44x_tlbe *tlbe)
58 {
59 u64 word1 = tlbe->word1;
60 return ((word1 & 0xf) << 32) | (word1 & 0xfffffc00);
61 }
62
get_tlb_tid(const struct kvmppc_44x_tlbe * tlbe)63 static inline unsigned int get_tlb_tid(const struct kvmppc_44x_tlbe *tlbe)
64 {
65 return tlbe->tid & 0xff;
66 }
67
get_tlb_ts(const struct kvmppc_44x_tlbe * tlbe)68 static inline unsigned int get_tlb_ts(const struct kvmppc_44x_tlbe *tlbe)
69 {
70 return (tlbe->word0 >> 8) & 0x1;
71 }
72
get_tlb_v(const struct kvmppc_44x_tlbe * tlbe)73 static inline unsigned int get_tlb_v(const struct kvmppc_44x_tlbe *tlbe)
74 {
75 return (tlbe->word0 >> 9) & 0x1;
76 }
77
get_mmucr_stid(const struct kvm_vcpu * vcpu)78 static inline unsigned int get_mmucr_stid(const struct kvm_vcpu *vcpu)
79 {
80 return vcpu->arch.mmucr & 0xff;
81 }
82
get_mmucr_sts(const struct kvm_vcpu * vcpu)83 static inline unsigned int get_mmucr_sts(const struct kvm_vcpu *vcpu)
84 {
85 return (vcpu->arch.mmucr >> 16) & 0x1;
86 }
87
tlb_xlate(struct kvmppc_44x_tlbe * tlbe,gva_t eaddr)88 static inline gpa_t tlb_xlate(struct kvmppc_44x_tlbe *tlbe, gva_t eaddr)
89 {
90 unsigned int pgmask = get_tlb_bytes(tlbe) - 1;
91
92 return get_tlb_raddr(tlbe) | (eaddr & pgmask);
93 }
94
95 #endif /* __KVM_POWERPC_TLB_H__ */
96