LXR linux/arch/powerpc/kvm/44x

   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__ */
  87