linux/arch/powerpc/kvm/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 <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__ */
  92