LXR qemu/target/arm/sve_ldst

   1/*
   2 * ARM SVE Load/Store Helpers
   3 *
   4 * Copyright (c) 2018-2022 Linaro
   5 *
   6 * This library is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU Lesser General Public
   8 * License as published by the Free Software Foundation; either
   9 * version 2.1 of the License, or (at your option) any later version.
  10 *
  11 * This library is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 * Lesser General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU Lesser General Public
  17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20#ifndef TARGET_ARM_SVE_LDST_INTERNAL_H
  21#define TARGET_ARM_SVE_LDST_INTERNAL_H
  22
  23#include "exec/cpu_ldst.h"
  24
  25/*
  26 * Load one element into @vd + @reg_off from @host.
  27 * The controlling predicate is known to be true.
  28 */
  29typedef void sve_ldst1_host_fn(void *vd, intptr_t reg_off, void *host);
  30
  31/*
  32 * Load one element into @vd + @reg_off from (@env, @vaddr, @ra).
  33 * The controlling predicate is known to be true.
  34 */
  35typedef void sve_ldst1_tlb_fn(CPUARMState *env, void *vd, intptr_t reg_off,
  36                              target_ulong vaddr, uintptr_t retaddr);
  37
  38/*
  39 * Generate the above primitives.
  40 */
  41
  42#define DO_LD_HOST(NAME, H, TYPEE, TYPEM, HOST)                              \
  43static inline void sve_##NAME##_host(void *vd, intptr_t reg_off, void *host) \
  44{ TYPEM val = HOST(host); *(TYPEE *)(vd + H(reg_off)) = val; }
  45
  46#define DO_ST_HOST(NAME, H, TYPEE, TYPEM, HOST)                              \
  47static inline void sve_##NAME##_host(void *vd, intptr_t reg_off, void *host) \
  48{ TYPEM val = *(TYPEE *)(vd + H(reg_off)); HOST(host, val); }
  49
  50#define DO_LD_TLB(NAME, H, TYPEE, TYPEM, TLB)                              \
  51static inline void sve_##NAME##_tlb(CPUARMState *env, void *vd,            \
  52                        intptr_t reg_off, target_ulong addr, uintptr_t ra) \
  53{                                                                          \
  54    TYPEM val = TLB(env, useronly_clean_ptr(addr), ra);                    \
  55    *(TYPEE *)(vd + H(reg_off)) = val;                                     \
  56}
  57
  58#define DO_ST_TLB(NAME, H, TYPEE, TYPEM, TLB)                              \
  59static inline void sve_##NAME##_tlb(CPUARMState *env, void *vd,            \
  60                        intptr_t reg_off, target_ulong addr, uintptr_t ra) \
  61{                                                                          \
  62    TYPEM val = *(TYPEE *)(vd + H(reg_off));                               \
  63    TLB(env, useronly_clean_ptr(addr), val, ra);                           \
  64}
  65
  66#define DO_LD_PRIM_1(NAME, H, TE, TM)                   \
  67    DO_LD_HOST(NAME, H, TE, TM, ldub_p)                 \
  68    DO_LD_TLB(NAME, H, TE, TM, cpu_ldub_data_ra)
  69
  70DO_LD_PRIM_1(ld1bb,  H1,   uint8_t,  uint8_t)
  71DO_LD_PRIM_1(ld1bhu, H1_2, uint16_t, uint8_t)
  72DO_LD_PRIM_1(ld1bhs, H1_2, uint16_t,  int8_t)
  73DO_LD_PRIM_1(ld1bsu, H1_4, uint32_t, uint8_t)
  74DO_LD_PRIM_1(ld1bss, H1_4, uint32_t,  int8_t)
  75DO_LD_PRIM_1(ld1bdu, H1_8, uint64_t, uint8_t)
  76DO_LD_PRIM_1(ld1bds, H1_8, uint64_t,  int8_t)
  77
  78#define DO_ST_PRIM_1(NAME, H, TE, TM)                   \
  79    DO_ST_HOST(st1##NAME, H, TE, TM, stb_p)             \
  80    DO_ST_TLB(st1##NAME, H, TE, TM, cpu_stb_data_ra)
  81
  82DO_ST_PRIM_1(bb,   H1,  uint8_t, uint8_t)
  83DO_ST_PRIM_1(bh, H1_2, uint16_t, uint8_t)
  84DO_ST_PRIM_1(bs, H1_4, uint32_t, uint8_t)
  85DO_ST_PRIM_1(bd, H1_8, uint64_t, uint8_t)
  86
  87#define DO_LD_PRIM_2(NAME, H, TE, TM, LD) \
  88    DO_LD_HOST(ld1##NAME##_be, H, TE, TM, LD##_be_p)    \
  89    DO_LD_HOST(ld1##NAME##_le, H, TE, TM, LD##_le_p)    \
  90    DO_LD_TLB(ld1##NAME##_be, H, TE, TM, cpu_##LD##_be_data_ra) \
  91    DO_LD_TLB(ld1##NAME##_le, H, TE, TM, cpu_##LD##_le_data_ra)
  92
  93#define DO_ST_PRIM_2(NAME, H, TE, TM, ST) \
  94    DO_ST_HOST(st1##NAME##_be, H, TE, TM, ST##_be_p)    \
  95    DO_ST_HOST(st1##NAME##_le, H, TE, TM, ST##_le_p)    \
  96    DO_ST_TLB(st1##NAME##_be, H, TE, TM, cpu_##ST##_be_data_ra) \
  97    DO_ST_TLB(st1##NAME##_le, H, TE, TM, cpu_##ST##_le_data_ra)
  98
  99DO_LD_PRIM_2(hh,  H1_2, uint16_t, uint16_t, lduw)
 100DO_LD_PRIM_2(hsu, H1_4, uint32_t, uint16_t, lduw)
 101DO_LD_PRIM_2(hss, H1_4, uint32_t,  int16_t, lduw)
 102DO_LD_PRIM_2(hdu, H1_8, uint64_t, uint16_t, lduw)
 103DO_LD_PRIM_2(hds, H1_8, uint64_t,  int16_t, lduw)
 104
 105DO_ST_PRIM_2(hh, H1_2, uint16_t, uint16_t, stw)
 106DO_ST_PRIM_2(hs, H1_4, uint32_t, uint16_t, stw)
 107DO_ST_PRIM_2(hd, H1_8, uint64_t, uint16_t, stw)
 108
 109DO_LD_PRIM_2(ss,  H1_4, uint32_t, uint32_t, ldl)
 110DO_LD_PRIM_2(sdu, H1_8, uint64_t, uint32_t, ldl)
 111DO_LD_PRIM_2(sds, H1_8, uint64_t,  int32_t, ldl)
 112
 113DO_ST_PRIM_2(ss, H1_4, uint32_t, uint32_t, stl)
 114DO_ST_PRIM_2(sd, H1_8, uint64_t, uint32_t, stl)
 115
 116DO_LD_PRIM_2(dd, H1_8, uint64_t, uint64_t, ldq)
 117DO_ST_PRIM_2(dd, H1_8, uint64_t, uint64_t, stq)
 118
 119#undef DO_LD_TLB
 120#undef DO_ST_TLB
 121#undef DO_LD_HOST
 122#undef DO_LD_PRIM_1
 123#undef DO_ST_PRIM_1
 124#undef DO_LD_PRIM_2
 125#undef DO_ST_PRIM_2
 126
 127/*
 128 * Resolve the guest virtual address to info->host and info->flags.
 129 * If @nofault, return false if the page is invalid, otherwise
 130 * exit via page fault exception.
 131 */
 132
 133typedef struct {
 134    void *host;
 135    int flags;
 136    MemTxAttrs attrs;
 137} SVEHostPage;
 138
 139bool sve_probe_page(SVEHostPage *info, bool nofault, CPUARMState *env,
 140                    target_ulong addr, int mem_off, MMUAccessType access_type,
 141                    int mmu_idx, uintptr_t retaddr);
 142
 143/*
 144 * Analyse contiguous data, protected by a governing predicate.
 145 */
 146
 147typedef enum {
 148    FAULT_NO,
 149    FAULT_FIRST,
 150    FAULT_ALL,
 151} SVEContFault;
 152
 153typedef struct {
 154    /*
 155     * First and last element wholly contained within the two pages.
 156     * mem_off_first[0] and reg_off_first[0] are always set >= 0.
 157     * reg_off_last[0] may be < 0 if the first element crosses pages.
 158     * All of mem_off_first[1], reg_off_first[1] and reg_off_last[1]
 159     * are set >= 0 only if there are complete elements on a second page.
 160     *
 161     * The reg_off_* offsets are relative to the internal vector register.
 162     * The mem_off_first offset is relative to the memory address; the
 163     * two offsets are different when a load operation extends, a store
 164     * operation truncates, or for multi-register operations.
 165     */
 166    int16_t mem_off_first[2];
 167    int16_t reg_off_first[2];
 168    int16_t reg_off_last[2];
 169
 170    /*
 171     * One element that is misaligned and spans both pages,
 172     * or -1 if there is no such active element.
 173     */
 174    int16_t mem_off_split;
 175    int16_t reg_off_split;
 176
 177    /*
 178     * The byte offset at which the entire operation crosses a page boundary.
 179     * Set >= 0 if and only if the entire operation spans two pages.
 180     */
 181    int16_t page_split;
 182
 183    /* TLB data for the two pages. */
 184    SVEHostPage page[2];
 185} SVEContLdSt;
 186
 187/*
 188 * Find first active element on each page, and a loose bound for the
 189 * final element on each page.  Identify any single element that spans
 190 * the page boundary.  Return true if there are any active elements.
 191 */
 192bool sve_cont_ldst_elements(SVEContLdSt *info, target_ulong addr, uint64_t *vg,
 193                            intptr_t reg_max, int esz, int msize);
 194
 195/*
 196 * Resolve the guest virtual addresses to info->page[].
 197 * Control the generation of page faults with @fault.  Return false if
 198 * there is no work to do, which can only happen with @fault == FAULT_NO.
 199 */
 200bool sve_cont_ldst_pages(SVEContLdSt *info, SVEContFault fault,
 201                         CPUARMState *env, target_ulong addr,
 202                         MMUAccessType access_type, uintptr_t retaddr);
 203
 204#ifdef CONFIG_USER_ONLY
 205static inline void
 206sve_cont_ldst_watchpoints(SVEContLdSt *info, CPUARMState *env, uint64_t *vg,
 207                          target_ulong addr, int esize, int msize,
 208                          int wp_access, uintptr_t retaddr)
 209{ }
 210#else
 211void sve_cont_ldst_watchpoints(SVEContLdSt *info, CPUARMState *env,
 212                               uint64_t *vg, target_ulong addr,
 213                               int esize, int msize, int wp_access,
 214                               uintptr_t retaddr);
 215#endif
 216
 217void sve_cont_ldst_mte_check(SVEContLdSt *info, CPUARMState *env, uint64_t *vg,
 218                             target_ulong addr, int esize, int msize,
 219                             uint32_t mtedesc, uintptr_t ra);
 220
 221#endif /* TARGET_ARM_SVE_LDST_INTERNAL_H */
 222