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44x_tlb.h
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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 <[email protected]>
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 */
34 static inline unsigned int get_tlb_size(const struct kvmppc_44x_tlbe *tlbe)
35 {
36  return (tlbe->word0 >> 4) & 0xf;
37 }
38 
39 static inline gva_t get_tlb_eaddr(const struct kvmppc_44x_tlbe *tlbe)
40 {
41  return tlbe->word0 & 0xfffffc00;
42 }
43 
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 
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 
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 
61 static inline unsigned int get_tlb_tid(const struct kvmppc_44x_tlbe *tlbe)
62 {
63  return tlbe->tid & 0xff;
64 }
65 
66 static inline unsigned int get_tlb_ts(const struct kvmppc_44x_tlbe *tlbe)
67 {
68  return (tlbe->word0 >> 8) & 0x1;
69 }
70 
71 static inline unsigned int get_tlb_v(const struct kvmppc_44x_tlbe *tlbe)
72 {
73  return (tlbe->word0 >> 9) & 0x1;
74 }
75 
76 static inline unsigned int get_mmucr_stid(const struct kvm_vcpu *vcpu)
77 {
78  return vcpu->arch.mmucr & 0xff;
79 }
80 
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__ */