/arch/powerpc/kvm/44x_tlb.h

 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);
28
29extern int kvmppc_44x_emul_tlbsx(struct kvm_vcpu *vcpu, u8 rt, u8 ra, u8 rb,
30                                 u8 rc);
31extern int kvmppc_44x_emul_tlbwe(struct kvm_vcpu *vcpu, u8 ra, u8 rs, u8 ws);
32
33/* TLB helper functions */
34static inline unsigned int get_tlb_size(const struct kvmppc_44x_tlbe *tlbe)
35{
36	return (tlbe->word0 >> 4) & 0xf;
37}
38
39static inline gva_t get_tlb_eaddr(const struct kvmppc_44x_tlbe *tlbe)
40{
41	return tlbe->word0 & 0xfffffc00;
42}
43
44static 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
50static 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
55static 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
61static inline unsigned int get_tlb_tid(const struct kvmppc_44x_tlbe *tlbe)
62{
63	return tlbe->tid & 0xff;
64}
65
66static inline unsigned int get_tlb_ts(const struct kvmppc_44x_tlbe *tlbe)
67{
68	return (tlbe->word0 >> 8) & 0x1;
69}
70
71static inline unsigned int get_tlb_v(const struct kvmppc_44x_tlbe *tlbe)
72{
73	return (tlbe->word0 >> 9) & 0x1;
74}
75
76static inline unsigned int get_mmucr_stid(const struct kvm_vcpu *vcpu)
77{
78	return vcpu->arch.mmucr & 0xff;
79}
80
81static 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__ */