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