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#include "hw/registerfields.h"
  22
  23#define FUNC_MASK(name, ret_type, size, max_val)                  \
  24static inline ret_type name(uint##size##_t start,                 \
  25                              uint##size##_t end)                 \
  26{                                                                 \
  27    ret_type ret, max_bit = size - 1;                             \
  28                                                                  \
  29    if (likely(start == 0)) {                                     \
  30        ret = max_val << (max_bit - end);                         \
  31    } else if (likely(end == max_bit)) {                          \
  32        ret = max_val >> start;                                   \
  33    } else {                                                      \
  34        ret = (((uint##size##_t)(-1ULL)) >> (start)) ^            \
  35            (((uint##size##_t)(-1ULL) >> (end)) >> 1);            \
  36        if (unlikely(start > end)) {                              \
  37            return ~ret;                                          \
  38        }                                                         \
  39    }                                                             \
  40                                                                  \
  41    return ret;                                                   \
  42}
  43
  44#if defined(TARGET_PPC64)
  45FUNC_MASK(MASK, target_ulong, 64, UINT64_MAX);
  46#else
  47FUNC_MASK(MASK, target_ulong, 32, UINT32_MAX);
  48#endif
  49FUNC_MASK(mask_u32, uint32_t, 32, UINT32_MAX);
  50FUNC_MASK(mask_u64, uint64_t, 64, UINT64_MAX);
  51
  52/*****************************************************************************/
  53/***                           Instruction decoding                        ***/
  54#define EXTRACT_HELPER(name, shift, nb)                                       \
  55static inline uint32_t name(uint32_t opcode)                                  \
  56{                                                                             \
  57    return extract32(opcode, shift, nb);                                      \
  58}
  59
  60#define EXTRACT_SHELPER(name, shift, nb)                                      \
  61static inline int32_t name(uint32_t opcode)                                   \
  62{                                                                             \
  63    return sextract32(opcode, shift, nb);                                     \
  64}
  65
  66#define EXTRACT_HELPER_SPLIT(name, shift1, nb1, shift2, nb2)                  \
  67static inline uint32_t name(uint32_t opcode)                                  \
  68{                                                                             \
  69    return extract32(opcode, shift1, nb1) << nb2 |                            \
  70               extract32(opcode, shift2, nb2);                                \
  71}
  72
  73#define EXTRACT_HELPER_SPLIT_3(name,                                          \
  74                              d0_bits, shift_op_d0, shift_d0,                 \
  75                              d1_bits, shift_op_d1, shift_d1,                 \
  76                              d2_bits, shift_op_d2, shift_d2)                 \
  77static inline int16_t name(uint32_t opcode)                                   \
  78{                                                                             \
  79    return                                                                    \
  80        (((opcode >> (shift_op_d0)) & ((1 << (d0_bits)) - 1)) << (shift_d0)) | \
  81        (((opcode >> (shift_op_d1)) & ((1 << (d1_bits)) - 1)) << (shift_d1)) | \
  82        (((opcode >> (shift_op_d2)) & ((1 << (d2_bits)) - 1)) << (shift_d2));  \
  83}
  84
  85
  86/* Opcode part 1 */
  87EXTRACT_HELPER(opc1, 26, 6);
  88/* Opcode part 2 */
  89EXTRACT_HELPER(opc2, 1, 5);
  90/* Opcode part 3 */
  91EXTRACT_HELPER(opc3, 6, 5);
  92/* Opcode part 4 */
  93EXTRACT_HELPER(opc4, 16, 5);
  94/* Update Cr0 flags */
  95EXTRACT_HELPER(Rc, 0, 1);
  96/* Update Cr6 flags (Altivec) */
  97EXTRACT_HELPER(Rc21, 10, 1);
  98/* Destination */
  99EXTRACT_HELPER(rD, 21, 5);
 100/* Source */
 101EXTRACT_HELPER(rS, 21, 5);
 102/* First operand */
 103EXTRACT_HELPER(rA, 16, 5);
 104/* Second operand */
 105EXTRACT_HELPER(rB, 11, 5);
 106/* Third operand */
 107EXTRACT_HELPER(rC, 6, 5);
 108/***                               Get CRn                                 ***/
 109EXTRACT_HELPER(crfD, 23, 3);
 110EXTRACT_HELPER(BF, 23, 3);
 111EXTRACT_HELPER(crfS, 18, 3);
 112EXTRACT_HELPER(crbD, 21, 5);
 113EXTRACT_HELPER(crbA, 16, 5);
 114EXTRACT_HELPER(crbB, 11, 5);
 115/* SPR / TBL */
 116EXTRACT_HELPER(_SPR, 11, 10);
 117static inline uint32_t SPR(uint32_t opcode)
 118{
 119    uint32_t sprn = _SPR(opcode);
 120
 121    return ((sprn >> 5) & 0x1F) | ((sprn & 0x1F) << 5);
 122}
 123/***                              Get constants                            ***/
 124/* 16 bits signed immediate value */
 125EXTRACT_SHELPER(SIMM, 0, 16);
 126/* 16 bits unsigned immediate value */
 127EXTRACT_HELPER(UIMM, 0, 16);
 128/* 5 bits signed immediate value */
 129EXTRACT_SHELPER(SIMM5, 16, 5);
 130/* 5 bits signed immediate value */
 131EXTRACT_HELPER(UIMM5, 16, 5);
 132/* 4 bits unsigned immediate value */
 133EXTRACT_HELPER(UIMM4, 16, 4);
 134/* Bit count */
 135EXTRACT_HELPER(NB, 11, 5);
 136/* Shift count */
 137EXTRACT_HELPER(SH, 11, 5);
 138/* lwat/stwat/ldat/lwat */
 139EXTRACT_HELPER(FC, 11, 5);
 140/* Vector shift count */
 141EXTRACT_HELPER(VSH, 6, 4);
 142/* Mask start */
 143EXTRACT_HELPER(MB, 6, 5);
 144/* Mask end */
 145EXTRACT_HELPER(ME, 1, 5);
 146/* Trap operand */
 147EXTRACT_HELPER(TO, 21, 5);
 148
 149EXTRACT_HELPER(CRM, 12, 8);
 150
 151#ifndef CONFIG_USER_ONLY
 152EXTRACT_HELPER(SR, 16, 4);
 153#endif
 154
 155/* mtfsf/mtfsfi */
 156EXTRACT_HELPER(FPBF, 23, 3);
 157EXTRACT_HELPER(FPIMM, 12, 4);
 158EXTRACT_HELPER(FPL, 25, 1);
 159EXTRACT_HELPER(FPFLM, 17, 8);
 160EXTRACT_HELPER(FPW, 16, 1);
 161
 162/* addpcis */
 163EXTRACT_HELPER_SPLIT_3(DX, 10, 6, 6, 5, 16, 1, 1, 0, 0)
 164#if defined(TARGET_PPC64)
 165/* darn */
 166EXTRACT_HELPER(L, 16, 2);
 167#endif
 168/* wait */
 169EXTRACT_HELPER(WC, 21, 2);
 170EXTRACT_HELPER(PL, 16, 2);
 171
 172/***                            Jump target decoding                       ***/
 173/* Immediate address */
 174static inline target_ulong LI(uint32_t opcode)
 175{
 176    return (opcode >> 0) & 0x03FFFFFC;
 177}
 178
 179static inline uint32_t BD(uint32_t opcode)
 180{
 181    return (opcode >> 0) & 0xFFFC;
 182}
 183
 184EXTRACT_HELPER(BO, 21, 5);
 185EXTRACT_HELPER(BI, 16, 5);
 186/* Absolute/relative address */
 187EXTRACT_HELPER(AA, 1, 1);
 188/* Link */
 189EXTRACT_HELPER(LK, 0, 1);
 190
 191/* DFP Z22-form */
 192EXTRACT_HELPER(DCM, 10, 6)
 193
 194/* DFP Z23-form */
 195EXTRACT_HELPER(RMC, 9, 2)
 196EXTRACT_HELPER(Rrm, 16, 1)
 197
 198EXTRACT_HELPER_SPLIT(DQxT, 3, 1, 21, 5);
 199EXTRACT_HELPER_SPLIT(xT, 0, 1, 21, 5);
 200EXTRACT_HELPER_SPLIT(xS, 0, 1, 21, 5);
 201EXTRACT_HELPER_SPLIT(xA, 2, 1, 16, 5);
 202EXTRACT_HELPER_SPLIT(xB, 1, 1, 11, 5);
 203EXTRACT_HELPER_SPLIT(xC, 3, 1,  6, 5);
 204EXTRACT_HELPER(DM, 8, 2);
 205EXTRACT_HELPER(UIM, 16, 2);
 206EXTRACT_HELPER(SHW, 8, 2);
 207EXTRACT_HELPER(SP, 19, 2);
 208EXTRACT_HELPER(IMM8, 11, 8);
 209EXTRACT_HELPER(DCMX, 16, 7);
 210EXTRACT_HELPER_SPLIT_3(DCMX_XV, 5, 16, 0, 1, 2, 5, 1, 6, 6);
 211
 212void helper_compute_fprf_float16(CPUPPCState *env, float16 arg);
 213void helper_compute_fprf_float32(CPUPPCState *env, float32 arg);
 214void helper_compute_fprf_float128(CPUPPCState *env, float128 arg);
 215
 216/* translate.c */
 217
 218int ppc_fixup_cpu(PowerPCCPU *cpu);
 219void create_ppc_opcodes(PowerPCCPU *cpu, Error **errp);
 220void destroy_ppc_opcodes(PowerPCCPU *cpu);
 221
 222/* gdbstub.c */
 223void ppc_gdb_init(CPUState *cs, PowerPCCPUClass *ppc);
 224gchar *ppc_gdb_arch_name(CPUState *cs);
 225
 226/**
 227 * prot_for_access_type:
 228 * @access_type: Access type
 229 *
 230 * Return the protection bit required for the given access type.
 231 */
 232static inline int prot_for_access_type(MMUAccessType access_type)
 233{
 234    switch (access_type) {
 235    case MMU_INST_FETCH:
 236        return PAGE_EXEC;
 237    case MMU_DATA_LOAD:
 238        return PAGE_READ;
 239    case MMU_DATA_STORE:
 240        return PAGE_WRITE;
 241    }
 242    g_assert_not_reached();
 243}
 244
 245/* PowerPC MMU emulation */
 246
 247typedef struct mmu_ctx_t mmu_ctx_t;
 248bool ppc_xlate(PowerPCCPU *cpu, vaddr eaddr, MMUAccessType access_type,
 249                      hwaddr *raddrp, int *psizep, int *protp,
 250                      int mmu_idx, bool guest_visible);
 251int get_physical_address_wtlb(CPUPPCState *env, mmu_ctx_t *ctx,
 252                                     target_ulong eaddr,
 253                                     MMUAccessType access_type, int type,
 254                                     int mmu_idx);
 255/* Software driven TLB helpers */
 256int ppc6xx_tlb_getnum(CPUPPCState *env, target_ulong eaddr,
 257                                    int way, int is_code);
 258/* Context used internally during MMU translations */
 259struct mmu_ctx_t {
 260    hwaddr raddr;      /* Real address              */
 261    hwaddr eaddr;      /* Effective address         */
 262    int prot;                      /* Protection bits           */
 263    hwaddr hash[2];    /* Pagetable hash values     */
 264    target_ulong ptem;             /* Virtual segment ID | API  */
 265    int key;                       /* Access key                */
 266    int nx;                        /* Non-execute area          */
 267};
 268
 269/* Common routines used by software and hardware TLBs emulation */
 270static inline int pte_is_valid(target_ulong pte0)
 271{
 272    return pte0 & 0x80000000 ? 1 : 0;
 273}
 274
 275static inline void pte_invalidate(target_ulong *pte0)
 276{
 277    *pte0 &= ~0x80000000;
 278}
 279
 280#define PTE_PTEM_MASK 0x7FFFFFBF
 281#define PTE_CHECK_MASK (TARGET_PAGE_MASK | 0x7B)
 282
 283#ifdef CONFIG_USER_ONLY
 284void ppc_cpu_record_sigsegv(CPUState *cs, vaddr addr,
 285                            MMUAccessType access_type,
 286                            bool maperr, uintptr_t ra);
 287#else
 288bool ppc_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
 289                      MMUAccessType access_type, int mmu_idx,
 290                      bool probe, uintptr_t retaddr);
 291G_NORETURN void ppc_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
 292                                            MMUAccessType access_type, int mmu_idx,
 293                                            uintptr_t retaddr);
 294#endif
 295
 296FIELD(GER_MSK, XMSK, 0, 4)
 297FIELD(GER_MSK, YMSK, 4, 4)
 298FIELD(GER_MSK, PMSK, 8, 8)
 299
 300static inline int ger_pack_masks(int pmsk, int ymsk, int xmsk)
 301{
 302    int msk = 0;
 303    msk = FIELD_DP32(msk, GER_MSK, XMSK, xmsk);
 304    msk = FIELD_DP32(msk, GER_MSK, YMSK, ymsk);
 305    msk = FIELD_DP32(msk, GER_MSK, PMSK, pmsk);
 306    return msk;
 307}
 308
 309#endif /* PPC_INTERNAL_H */
 310