tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
26extern int kvmppc_44x_tlb_index(struct kvm_vcpu *vcpu, gva_t eaddr,
27 unsigned int pid, unsigned int as);
28extern struct tlbe *kvmppc_44x_dtlb_search(struct kvm_vcpu *vcpu, gva_t eaddr);
29extern struct tlbe *kvmppc_44x_itlb_search(struct kvm_vcpu *vcpu, gva_t eaddr);
30
31/* TLB helper functions */
32static inline unsigned int get_tlb_size(const struct tlbe *tlbe)
33{
34 return (tlbe->word0 >> 4) & 0xf;
35}
36
37static inline gva_t get_tlb_eaddr(const struct tlbe *tlbe)
38{
39 return tlbe->word0 & 0xfffffc00;
40}
41
42static 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
48static inline gva_t get_tlb_end(const struct tlbe *tlbe)
49{
50 return get_tlb_eaddr(tlbe) + get_tlb_bytes(tlbe) - 1;
51}
52
53static inline u64 get_tlb_raddr(const struct tlbe *tlbe)
54{
55 u64 word1 = tlbe->word1;
56 return ((word1 & 0xf) << 32) | (word1 & 0xfffffc00);
57}
58
59static inline unsigned int get_tlb_tid(const struct tlbe *tlbe)
60{
61 return tlbe->tid & 0xff;
62}
63
64static inline unsigned int get_tlb_ts(const struct tlbe *tlbe)
65{
66 return (tlbe->word0 >> 8) & 0x1;
67}
68
69static inline unsigned int get_tlb_v(const struct tlbe *tlbe)
70{
71 return (tlbe->word0 >> 9) & 0x1;
72}
73
74static inline unsigned int get_mmucr_stid(const struct kvm_vcpu *vcpu)
75{
76 return vcpu->arch.mmucr & 0xff;
77}
78
79static inline unsigned int get_mmucr_sts(const struct kvm_vcpu *vcpu)
80{
81 return (vcpu->arch.mmucr >> 16) & 0x1;
82}
83
84static 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__ */