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
  26 extern int kvmppc_44x_tlb_index(struct kvm_vcpu *vcpu, gva_t eaddr,
  27                                 unsigned int pid, unsigned int as);
  28 extern int kvmppc_44x_dtlb_index(struct kvm_vcpu *vcpu, gva_t eaddr);
  29 extern int kvmppc_44x_itlb_index(struct kvm_vcpu *vcpu, gva_t eaddr);
  30
  31 extern int kvmppc_44x_emul_tlbsx(struct kvm_vcpu *vcpu, u8 rt, u8 ra, u8 rb,
  32                                  u8 rc);
  33 extern int kvmppc_44x_emul_tlbwe(struct kvm_vcpu *vcpu, u8 ra, u8 rs, u8 ws);
  34
  35 /* TLB helper functions */
  36 static inline unsigned int get_tlb_size(const struct kvmppc_44x_tlbe *tlbe)
  37 {
  38         return (tlbe->word0 >> 4) & 0xf;
  39 }
  40
  41 static inline gva_t get_tlb_eaddr(const struct kvmppc_44x_tlbe *tlbe)
  42 {
  43         return tlbe->word0 & 0xfffffc00;
  44 }
  45
  46 static inline gva_t get_tlb_bytes(const struct kvmppc_44x_tlbe *tlbe)
  47 {
  48         unsigned int pgsize = get_tlb_size(tlbe);
  49         return 1 << 10 << (pgsize << 1);
  50 }
  51
  52 static inline gva_t get_tlb_end(const struct kvmppc_44x_tlbe *tlbe)
  53 {
  54         return get_tlb_eaddr(tlbe) + get_tlb_bytes(tlbe) - 1;
  55 }
  56
  57 static inline u64 get_tlb_raddr(const struct kvmppc_44x_tlbe *tlbe)
  58 {
  59         u64 word1 = tlbe->word1;
  60         return ((word1 & 0xf) << 32) | (word1 & 0xfffffc00);
  61 }
  62
  63 static inline unsigned int get_tlb_tid(const struct kvmppc_44x_tlbe *tlbe)
  64 {
  65         return tlbe->tid & 0xff;
  66 }
  67
  68 static inline unsigned int get_tlb_ts(const struct kvmppc_44x_tlbe *tlbe)
  69 {
  70         return (tlbe->word0 >> 8) & 0x1;
  71 }
  72
  73 static inline unsigned int get_tlb_v(const struct kvmppc_44x_tlbe *tlbe)
  74 {
  75         return (tlbe->word0 >> 9) & 0x1;
  76 }
  77
  78 static inline unsigned int get_mmucr_stid(const struct kvm_vcpu *vcpu)
  79 {
  80         return vcpu->arch.mmucr & 0xff;
  81 }
  82
  83 static inline unsigned int get_mmucr_sts(const struct kvm_vcpu *vcpu)
  84 {
  85         return (vcpu->arch.mmucr >> 16) & 0x1;
  86 }
  87
  88 static inline gpa_t tlb_xlate(struct kvmppc_44x_tlbe *tlbe, gva_t eaddr)
  89 {
  90         unsigned int pgmask = get_tlb_bytes(tlbe) - 1;
  91
  92         return get_tlb_raddr(tlbe) | (eaddr & pgmask);
  93 }
  94
  95 #endif /* __KVM_POWERPC_TLB_H__ */