1 files changed, 94 insertions, 0 deletions

diff --git a/src/core/arm/mmu/tlb.h b/src/core/arm/mmu/tlb.h
new file mode 100644
index 000000000..938c01786
--- /dev/null
+++ b/src/core/arm/mmu/tlb.h
@@ -0,0 +1,94 @@
+#ifndef _MMU_TLB_H_
+#define _MMU_TLB_H_
+
+typedef enum tlb_mapping_t
+{
+    TLB_INVALID = 0,
+    TLB_SMALLPAGE = 1,
+    TLB_LARGEPAGE = 2,
+    TLB_SECTION = 3,
+    TLB_ESMALLPAGE = 4,
+    TLB_TINYPAGE = 5
+} tlb_mapping_t;
+
+extern ARMword tlb_masks[];
+
+/* Permissions bits in a TLB entry:
+ *
+ *         31         12 11 10  9  8  7  6  5  4  3   2   1   0
+ *        +-------------+-----+-----+-----+-----+---+---+-------+
+ * Page:|             | ap3 | ap2 | ap1 | ap0 | C | B |       |
+ *        +-------------+-----+-----+-----+-----+---+---+-------+
+ *
+ *         31         12 11 10  9              4  3   2   1   0
+ *            +-------------+-----+-----------------+---+---+-------+
+ * Section:    |             |  AP |                 | C | B |       |
+ *            +-------------+-----+-----------------+---+---+-------+
+ */
+
+/*
+section:
+    section base address    [31:20]
+    AP            - table 8-2, page 8-8
+    domain
+    C,B
+
+page:
+    page base address    [31:16] or [31:12]
+    ap[3:0]
+    domain (from L1)
+    C,B
+*/
+
+
+typedef struct tlb_entry_t
+{
+    ARMword virt_addr;
+    ARMword phys_addr;
+    ARMword perms;
+    ARMword domain;
+    tlb_mapping_t mapping;
+} tlb_entry_t;
+
+typedef struct tlb_s
+{
+    int num;        /*num of tlb entry */
+    int cycle;        /*current tlb cycle */
+    tlb_entry_t *entrys;
+} tlb_s;
+
+
+#define tlb_c_flag(tlb) \
+    ((tlb)->perms & 0x8)
+#define tlb_b_flag(tlb) \
+    ((tlb)->perms & 0x4)
+
+#define  tlb_va_to_pa(tlb, va) \
+(\
+ {\
+    ARMword mask = tlb_masks[tlb->mapping];      \
+    (tlb->phys_addr & mask) | (va & ~mask);\
+ }\
+)
+
+fault_t
+check_access (ARMul_State * state, ARMword virt_addr, tlb_entry_t * tlb,
+          int read);
+
+fault_t
+translate (ARMul_State * state, ARMword virt_addr, tlb_s * tlb_t,
+       tlb_entry_t ** tlb);
+
+int mmu_tlb_init (tlb_s * tlb_t, int num);
+
+void mmu_tlb_exit (tlb_s * tlb_t);
+
+void mmu_tlb_invalidate_all (ARMul_State * state, tlb_s * tlb_t);
+
+void
+mmu_tlb_invalidate_entry (ARMul_State * state, tlb_s * tlb_t, ARMword addr);
+
+tlb_entry_t *mmu_tlb_search (ARMul_State * state, tlb_s * tlb_t,
+                 ARMword virt_addr);
+
+#endif        /*_MMU_TLB_H_*/