LXR qemu/target/ppc/internal.h

   1/*
   2 *  PowerPC internal definitions for qemu.
   3 *
   4 * This library is free software; you can redistribute it and/or
   5 * modify it under the terms of the GNU Lesser General Public
   6 * License as published by the Free Software Foundation; either
   7 * version 2.1 of the License, or (at your option) any later version.
   8 *
   9 * This library is distributed in the hope that it will be useful,
  10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 * Lesser General Public License for more details.
  13 *
  14 * You should have received a copy of the GNU Lesser General Public
  15 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  16 */
  17
  18#ifndef PPC_INTERNAL_H
  19#define PPC_INTERNAL_H
  20
  21#define FUNC_MASK(name, ret_type, size, max_val)                  \
  22static inline ret_type name(uint##size##_t start,                 \
  23                              uint##size##_t end)                 \
  24{                                                                 \
  25    ret_type ret, max_bit = size - 1;                             \
  26                                                                  \
  27    if (likely(start == 0)) {                                     \
  28        ret = max_val << (max_bit - end);                         \
  29    } else if (likely(end == max_bit)) {                          \
  30        ret = max_val >> start;                                   \
  31    } else {                                                      \
  32        ret = (((uint##size##_t)(-1ULL)) >> (start)) ^            \
  33            (((uint##size##_t)(-1ULL) >> (end)) >> 1);            \
  34        if (unlikely(start > end)) {                              \
  35            return ~ret;                                          \
  36        }                                                         \
  37    }                                                             \
  38                                                                  \
  39    return ret;                                                   \
  40}
  41
  42#if defined(TARGET_PPC64)
  43FUNC_MASK(MASK, target_ulong, 64, UINT64_MAX);
  44#else
  45FUNC_MASK(MASK, target_ulong, 32, UINT32_MAX);
  46#endif
  47FUNC_MASK(mask_u32, uint32_t, 32, UINT32_MAX);
  48FUNC_MASK(mask_u64, uint64_t, 64, UINT64_MAX);
  49
  50/*****************************************************************************/
  51/***                           Instruction decoding                        ***/
  52#define EXTRACT_HELPER(name, shift, nb)                                       \
  53static inline uint32_t name(uint32_t opcode)                                  \
  54{                                                                             \
  55    return extract32(opcode, shift, nb);                                      \
  56}
  57
  58#define EXTRACT_SHELPER(name, shift, nb)                                      \
  59static inline int32_t name(uint32_t opcode)                                   \
  60{                                                                             \
  61    return sextract32(opcode, shift, nb);                                     \
  62}
  63
  64#define EXTRACT_HELPER_SPLIT(name, shift1, nb1, shift2, nb2)                  \
  65static inline uint32_t name(uint32_t opcode)                                  \
  66{                                                                             \
  67    return extract32(opcode, shift1, nb1) << nb2 |                            \
  68               extract32(opcode, shift2, nb2);                                \
  69}
  70
  71#define EXTRACT_HELPER_SPLIT_3(name,                                          \
  72                              d0_bits, shift_op_d0, shift_d0,                 \
  73                              d1_bits, shift_op_d1, shift_d1,                 \
  74                              d2_bits, shift_op_d2, shift_d2)                 \
  75static inline int16_t name(uint32_t opcode)                                   \
  76{                                                                             \
  77    return                                                                    \
  78        (((opcode >> (shift_op_d0)) & ((1 << (d0_bits)) - 1)) << (shift_d0)) | \
  79        (((opcode >> (shift_op_d1)) & ((1 << (d1_bits)) - 1)) << (shift_d1)) | \
  80        (((opcode >> (shift_op_d2)) & ((1 << (d2_bits)) - 1)) << (shift_d2));  \
  81}
  82
  83
  84/* Opcode part 1 */
  85EXTRACT_HELPER(opc1, 26, 6);
  86/* Opcode part 2 */
  87EXTRACT_HELPER(opc2, 1, 5);
  88/* Opcode part 3 */
  89EXTRACT_HELPER(opc3, 6, 5);
  90/* Opcode part 4 */
  91EXTRACT_HELPER(opc4, 16, 5);
  92/* Update Cr0 flags */
  93EXTRACT_HELPER(Rc, 0, 1);
  94/* Update Cr6 flags (Altivec) */
  95EXTRACT_HELPER(Rc21, 10, 1);
  96/* Destination */
  97EXTRACT_HELPER(rD, 21, 5);
  98/* Source */
  99EXTRACT_HELPER(rS, 21, 5);
 100/* First operand */
 101EXTRACT_HELPER(rA, 16, 5);
 102/* Second operand */
 103EXTRACT_HELPER(rB, 11, 5);
 104/* Third operand */
 105EXTRACT_HELPER(rC, 6, 5);
 106/***                               Get CRn                                 ***/
 107EXTRACT_HELPER(crfD, 23, 3);
 108EXTRACT_HELPER(BF, 23, 3);
 109EXTRACT_HELPER(crfS, 18, 3);
 110EXTRACT_HELPER(crbD, 21, 5);
 111EXTRACT_HELPER(crbA, 16, 5);
 112EXTRACT_HELPER(crbB, 11, 5);
 113/* SPR / TBL */
 114EXTRACT_HELPER(_SPR, 11, 10);
 115static inline uint32_t SPR(uint32_t opcode)
 116{
 117    uint32_t sprn = _SPR(opcode);
 118
 119    return ((sprn >> 5) & 0x1F) | ((sprn & 0x1F) << 5);
 120}
 121/***                              Get constants                            ***/
 122/* 16 bits signed immediate value */
 123EXTRACT_SHELPER(SIMM, 0, 16);
 124/* 16 bits unsigned immediate value */
 125EXTRACT_HELPER(UIMM, 0, 16);
 126/* 5 bits signed immediate value */
 127EXTRACT_SHELPER(SIMM5, 16, 5);
 128/* 5 bits signed immediate value */
 129EXTRACT_HELPER(UIMM5, 16, 5);
 130/* 4 bits unsigned immediate value */
 131EXTRACT_HELPER(UIMM4, 16, 4);
 132/* Bit count */
 133EXTRACT_HELPER(NB, 11, 5);
 134/* Shift count */
 135EXTRACT_HELPER(SH, 11, 5);
 136/* lwat/stwat/ldat/lwat */
 137EXTRACT_HELPER(FC, 11, 5);
 138/* Vector shift count */
 139EXTRACT_HELPER(VSH, 6, 4);
 140/* Mask start */
 141EXTRACT_HELPER(MB, 6, 5);
 142/* Mask end */
 143EXTRACT_HELPER(ME, 1, 5);
 144/* Trap operand */
 145EXTRACT_HELPER(TO, 21, 5);
 146
 147EXTRACT_HELPER(CRM, 12, 8);
 148
 149#ifndef CONFIG_USER_ONLY
 150EXTRACT_HELPER(SR, 16, 4);
 151#endif
 152
 153/* mtfsf/mtfsfi */
 154EXTRACT_HELPER(FPBF, 23, 3);
 155EXTRACT_HELPER(FPIMM, 12, 4);
 156EXTRACT_HELPER(FPL, 25, 1);
 157EXTRACT_HELPER(FPFLM, 17, 8);
 158EXTRACT_HELPER(FPW, 16, 1);
 159
 160/* mffscrni */
 161EXTRACT_HELPER(RM, 11, 2);
 162
 163/* addpcis */
 164EXTRACT_HELPER_SPLIT_3(DX, 10, 6, 6, 5, 16, 1, 1, 0, 0)
 165#if defined(TARGET_PPC64)
 166/* darn */
 167EXTRACT_HELPER(L, 16, 2);
 168#endif
 169
 170/***                            Jump target decoding                       ***/
 171/* Immediate address */
 172static inline target_ulong LI(uint32_t opcode)
 173{
 174    return (opcode >> 0) & 0x03FFFFFC;
 175}
 176
 177static inline uint32_t BD(uint32_t opcode)
 178{
 179    return (opcode >> 0) & 0xFFFC;
 180}
 181
 182EXTRACT_HELPER(BO, 21, 5);
 183EXTRACT_HELPER(BI, 16, 5);
 184/* Absolute/relative address */
 185EXTRACT_HELPER(AA, 1, 1);
 186/* Link */
 187EXTRACT_HELPER(LK, 0, 1);
 188
 189/* DFP Z22-form */
 190EXTRACT_HELPER(DCM, 10, 6)
 191
 192/* DFP Z23-form */
 193EXTRACT_HELPER(RMC, 9, 2)
 194EXTRACT_HELPER(Rrm, 16, 1)
 195
 196EXTRACT_HELPER_SPLIT(DQxT, 3, 1, 21, 5);
 197EXTRACT_HELPER_SPLIT(xT, 0, 1, 21, 5);
 198EXTRACT_HELPER_SPLIT(xS, 0, 1, 21, 5);
 199EXTRACT_HELPER_SPLIT(xA, 2, 1, 16, 5);
 200EXTRACT_HELPER_SPLIT(xB, 1, 1, 11, 5);
 201EXTRACT_HELPER_SPLIT(xC, 3, 1,  6, 5);
 202EXTRACT_HELPER(DM, 8, 2);
 203EXTRACT_HELPER(UIM, 16, 2);
 204EXTRACT_HELPER(SHW, 8, 2);
 205EXTRACT_HELPER(SP, 19, 2);
 206EXTRACT_HELPER(IMM8, 11, 8);
 207EXTRACT_HELPER(DCMX, 16, 7);
 208EXTRACT_HELPER_SPLIT_3(DCMX_XV, 5, 16, 0, 1, 2, 5, 1, 6, 6);
 209
 210void helper_compute_fprf_float16(CPUPPCState *env, float16 arg);
 211void helper_compute_fprf_float32(CPUPPCState *env, float32 arg);
 212void helper_compute_fprf_float128(CPUPPCState *env, float128 arg);
 213
 214/* translate.c */
 215
 216int ppc_fixup_cpu(PowerPCCPU *cpu);
 217void create_ppc_opcodes(PowerPCCPU *cpu, Error **errp);
 218void destroy_ppc_opcodes(PowerPCCPU *cpu);
 219
 220/* gdbstub.c */
 221void ppc_gdb_init(CPUState *cs, PowerPCCPUClass *ppc);
 222gchar *ppc_gdb_arch_name(CPUState *cs);
 223
 224/**
 225 * prot_for_access_type:
 226 * @access_type: Access type
 227 *
 228 * Return the protection bit required for the given access type.
 229 */
 230static inline int prot_for_access_type(MMUAccessType access_type)
 231{
 232    switch (access_type) {
 233    case MMU_INST_FETCH:
 234        return PAGE_EXEC;
 235    case MMU_DATA_LOAD:
 236        return PAGE_READ;
 237    case MMU_DATA_STORE:
 238        return PAGE_WRITE;
 239    }
 240    g_assert_not_reached();
 241}
 242
 243/* PowerPC MMU emulation */
 244
 245typedef struct mmu_ctx_t mmu_ctx_t;
 246bool ppc_xlate(PowerPCCPU *cpu, vaddr eaddr, MMUAccessType access_type,
 247                      hwaddr *raddrp, int *psizep, int *protp,
 248                      int mmu_idx, bool guest_visible);
 249int get_physical_address_wtlb(CPUPPCState *env, mmu_ctx_t *ctx,
 250                                     target_ulong eaddr,
 251                                     MMUAccessType access_type, int type,
 252                                     int mmu_idx);
 253/* Software driven TLB helpers */
 254int ppc6xx_tlb_getnum(CPUPPCState *env, target_ulong eaddr,
 255                                    int way, int is_code);
 256/* Context used internally during MMU translations */
 257struct mmu_ctx_t {
 258    hwaddr raddr;      /* Real address              */
 259    hwaddr eaddr;      /* Effective address         */
 260    int prot;                      /* Protection bits           */
 261    hwaddr hash[2];    /* Pagetable hash values     */
 262    target_ulong ptem;             /* Virtual segment ID | API  */
 263    int key;                       /* Access key                */
 264    int nx;                        /* Non-execute area          */
 265};
 266
 267/* Common routines used by software and hardware TLBs emulation */
 268static inline int pte_is_valid(target_ulong pte0)
 269{
 270    return pte0 & 0x80000000 ? 1 : 0;
 271}
 272
 273static inline void pte_invalidate(target_ulong *pte0)
 274{
 275    *pte0 &= ~0x80000000;
 276}
 277
 278#define PTE_PTEM_MASK 0x7FFFFFBF
 279#define PTE_CHECK_MASK (TARGET_PAGE_MASK | 0x7B)
 280
 281#ifdef CONFIG_USER_ONLY
 282void ppc_cpu_record_sigsegv(CPUState *cs, vaddr addr,
 283                            MMUAccessType access_type,
 284                            bool maperr, uintptr_t ra);
 285#else
 286bool ppc_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
 287                      MMUAccessType access_type, int mmu_idx,
 288                      bool probe, uintptr_t retaddr);
 289void ppc_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
 290                                 MMUAccessType access_type, int mmu_idx,
 291                                 uintptr_t retaddr) QEMU_NORETURN;
 292#endif
 293
 294#endif /* PPC_INTERNAL_H */
 295