2 * RISC-V CPU helpers for qemu.
4 * Copyright (c) 2016-2017 Sagar Karandikar, sagark@eecs.berkeley.edu
5 * Copyright (c) 2017-2018 SiFive, Inc.
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms and conditions of the GNU General Public License,
9 * version 2 or later, as published by the Free Software Foundation.
11 * This program is distributed in the hope it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 * You should have received a copy of the GNU General Public License along with
17 * this program. If not, see <http://www.gnu.org/licenses/>.
20 #include "qemu/osdep.h"
22 #include "qemu/main-loop.h"
24 #include "internals.h"
26 #include "exec/exec-all.h"
28 #include "tcg/tcg-op.h"
30 #include "semihosting/common-semi.h"
31 #include "sysemu/cpu-timers.h"
35 int riscv_cpu_mmu_index(CPURISCVState *env, bool ifetch)
37 #ifdef CONFIG_USER_ONLY
44 /* All priv -> mmu_idx mapping are here */
46 if (mode == PRV_M && get_field(env->mstatus, MSTATUS_MPRV)) {
47 mode = get_field(env->mstatus, MSTATUS_MPP);
49 if (mode == PRV_S && get_field(env->mstatus, MSTATUS_SUM)) {
56 void cpu_get_tb_cpu_state(CPURISCVState *env, target_ulong *pc,
57 target_ulong *cs_base, uint32_t *pflags)
59 CPUState *cs = env_cpu(env);
60 RISCVCPU *cpu = RISCV_CPU(cs);
61 RISCVExtStatus fs, vs;
64 *pc = env->xl == MXL_RV32 ? env->pc & UINT32_MAX : env->pc;
67 if (cpu->cfg.ext_zve32f) {
69 * If env->vl equals to VLMAX, we can use generic vector operation
70 * expanders (GVEC) to accerlate the vector operations.
71 * However, as LMUL could be a fractional number. The maximum
72 * vector size can be operated might be less than 8 bytes,
73 * which is not supported by GVEC. So we set vl_eq_vlmax flag to true
74 * only when maxsz >= 8 bytes.
76 uint32_t vlmax = vext_get_vlmax(cpu, env->vtype);
77 uint32_t sew = FIELD_EX64(env->vtype, VTYPE, VSEW);
78 uint32_t maxsz = vlmax << sew;
79 bool vl_eq_vlmax = (env->vstart == 0) && (vlmax == env->vl) &&
81 flags = FIELD_DP32(flags, TB_FLAGS, VILL, env->vill);
82 flags = FIELD_DP32(flags, TB_FLAGS, SEW, sew);
83 flags = FIELD_DP32(flags, TB_FLAGS, LMUL,
84 FIELD_EX64(env->vtype, VTYPE, VLMUL));
85 flags = FIELD_DP32(flags, TB_FLAGS, VL_EQ_VLMAX, vl_eq_vlmax);
86 flags = FIELD_DP32(flags, TB_FLAGS, VTA,
87 FIELD_EX64(env->vtype, VTYPE, VTA));
88 flags = FIELD_DP32(flags, TB_FLAGS, VMA,
89 FIELD_EX64(env->vtype, VTYPE, VMA));
90 flags = FIELD_DP32(flags, TB_FLAGS, VSTART_EQ_ZERO, env->vstart == 0);
92 flags = FIELD_DP32(flags, TB_FLAGS, VILL, 1);
95 #ifdef CONFIG_USER_ONLY
96 fs = EXT_STATUS_DIRTY;
97 vs = EXT_STATUS_DIRTY;
99 flags = FIELD_DP32(flags, TB_FLAGS, PRIV, env->priv);
101 flags |= cpu_mmu_index(env, 0);
102 fs = get_field(env->mstatus, MSTATUS_FS);
103 vs = get_field(env->mstatus, MSTATUS_VS);
105 if (env->virt_enabled) {
106 flags = FIELD_DP32(flags, TB_FLAGS, VIRT_ENABLED, 1);
108 * Merge DISABLED and !DIRTY states using MIN.
109 * We will set both fields when dirtying.
111 fs = MIN(fs, get_field(env->mstatus_hs, MSTATUS_FS));
112 vs = MIN(vs, get_field(env->mstatus_hs, MSTATUS_VS));
115 if (cpu->cfg.debug && !icount_enabled()) {
116 flags = FIELD_DP32(flags, TB_FLAGS, ITRIGGER, env->itrigger_enabled);
120 flags = FIELD_DP32(flags, TB_FLAGS, FS, fs);
121 flags = FIELD_DP32(flags, TB_FLAGS, VS, vs);
122 flags = FIELD_DP32(flags, TB_FLAGS, XL, env->xl);
123 if (env->cur_pmmask < (env->xl == MXL_RV32 ? UINT32_MAX : UINT64_MAX)) {
124 flags = FIELD_DP32(flags, TB_FLAGS, PM_MASK_ENABLED, 1);
126 if (env->cur_pmbase != 0) {
127 flags = FIELD_DP32(flags, TB_FLAGS, PM_BASE_ENABLED, 1);
133 void riscv_cpu_update_mask(CPURISCVState *env)
135 target_ulong mask = -1, base = 0;
137 * TODO: Current RVJ spec does not specify
138 * how the extension interacts with XLEN.
140 #ifndef CONFIG_USER_ONLY
141 if (riscv_has_ext(env, RVJ)) {
144 if (env->mmte & M_PM_ENABLE) {
150 if (env->mmte & S_PM_ENABLE) {
156 if (env->mmte & U_PM_ENABLE) {
162 g_assert_not_reached();
166 if (env->xl == MXL_RV32) {
167 env->cur_pmmask = mask & UINT32_MAX;
168 env->cur_pmbase = base & UINT32_MAX;
170 env->cur_pmmask = mask;
171 env->cur_pmbase = base;
175 #ifndef CONFIG_USER_ONLY
178 * The HS-mode is allowed to configure priority only for the
179 * following VS-mode local interrupts:
181 * 0 (Reserved interrupt, reads as zero)
182 * 1 Supervisor software interrupt
183 * 4 (Reserved interrupt, reads as zero)
184 * 5 Supervisor timer interrupt
185 * 8 (Reserved interrupt, reads as zero)
186 * 13 (Reserved interrupt)
199 static const int hviprio_index2irq[] = {
200 0, 1, 4, 5, 8, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23 };
201 static const int hviprio_index2rdzero[] = {
202 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
204 int riscv_cpu_hviprio_index2irq(int index, int *out_irq, int *out_rdzero)
206 if (index < 0 || ARRAY_SIZE(hviprio_index2irq) <= index) {
211 *out_irq = hviprio_index2irq[index];
215 *out_rdzero = hviprio_index2rdzero[index];
222 * Default priorities of local interrupts are defined in the
223 * RISC-V Advanced Interrupt Architecture specification.
225 * ----------------------------------------------------------------
227 * Priority | Major Interrupt Numbers
228 * ----------------------------------------------------------------
229 * Highest | 47, 23, 46, 45, 22, 44,
230 * | 43, 21, 42, 41, 20, 40
232 * | 11 (0b), 3 (03), 7 (07)
233 * | 9 (09), 1 (01), 5 (05)
235 * | 10 (0a), 2 (02), 6 (06)
237 * | 39, 19, 38, 37, 18, 36,
238 * Lowest | 35, 17, 34, 33, 16, 32
239 * ----------------------------------------------------------------
241 static const uint8_t default_iprio[64] = {
242 /* Custom interrupts 48 to 63 */
243 [63] = IPRIO_MMAXIPRIO,
244 [62] = IPRIO_MMAXIPRIO,
245 [61] = IPRIO_MMAXIPRIO,
246 [60] = IPRIO_MMAXIPRIO,
247 [59] = IPRIO_MMAXIPRIO,
248 [58] = IPRIO_MMAXIPRIO,
249 [57] = IPRIO_MMAXIPRIO,
250 [56] = IPRIO_MMAXIPRIO,
251 [55] = IPRIO_MMAXIPRIO,
252 [54] = IPRIO_MMAXIPRIO,
253 [53] = IPRIO_MMAXIPRIO,
254 [52] = IPRIO_MMAXIPRIO,
255 [51] = IPRIO_MMAXIPRIO,
256 [50] = IPRIO_MMAXIPRIO,
257 [49] = IPRIO_MMAXIPRIO,
258 [48] = IPRIO_MMAXIPRIO,
260 /* Custom interrupts 24 to 31 */
261 [31] = IPRIO_MMAXIPRIO,
262 [30] = IPRIO_MMAXIPRIO,
263 [29] = IPRIO_MMAXIPRIO,
264 [28] = IPRIO_MMAXIPRIO,
265 [27] = IPRIO_MMAXIPRIO,
266 [26] = IPRIO_MMAXIPRIO,
267 [25] = IPRIO_MMAXIPRIO,
268 [24] = IPRIO_MMAXIPRIO,
270 [47] = IPRIO_DEFAULT_UPPER,
271 [23] = IPRIO_DEFAULT_UPPER + 1,
272 [46] = IPRIO_DEFAULT_UPPER + 2,
273 [45] = IPRIO_DEFAULT_UPPER + 3,
274 [22] = IPRIO_DEFAULT_UPPER + 4,
275 [44] = IPRIO_DEFAULT_UPPER + 5,
277 [43] = IPRIO_DEFAULT_UPPER + 6,
278 [21] = IPRIO_DEFAULT_UPPER + 7,
279 [42] = IPRIO_DEFAULT_UPPER + 8,
280 [41] = IPRIO_DEFAULT_UPPER + 9,
281 [20] = IPRIO_DEFAULT_UPPER + 10,
282 [40] = IPRIO_DEFAULT_UPPER + 11,
284 [11] = IPRIO_DEFAULT_M,
285 [3] = IPRIO_DEFAULT_M + 1,
286 [7] = IPRIO_DEFAULT_M + 2,
288 [9] = IPRIO_DEFAULT_S,
289 [1] = IPRIO_DEFAULT_S + 1,
290 [5] = IPRIO_DEFAULT_S + 2,
292 [12] = IPRIO_DEFAULT_SGEXT,
294 [10] = IPRIO_DEFAULT_VS,
295 [2] = IPRIO_DEFAULT_VS + 1,
296 [6] = IPRIO_DEFAULT_VS + 2,
298 [39] = IPRIO_DEFAULT_LOWER,
299 [19] = IPRIO_DEFAULT_LOWER + 1,
300 [38] = IPRIO_DEFAULT_LOWER + 2,
301 [37] = IPRIO_DEFAULT_LOWER + 3,
302 [18] = IPRIO_DEFAULT_LOWER + 4,
303 [36] = IPRIO_DEFAULT_LOWER + 5,
305 [35] = IPRIO_DEFAULT_LOWER + 6,
306 [17] = IPRIO_DEFAULT_LOWER + 7,
307 [34] = IPRIO_DEFAULT_LOWER + 8,
308 [33] = IPRIO_DEFAULT_LOWER + 9,
309 [16] = IPRIO_DEFAULT_LOWER + 10,
310 [32] = IPRIO_DEFAULT_LOWER + 11,
313 uint8_t riscv_cpu_default_priority(int irq)
315 if (irq < 0 || irq > 63) {
316 return IPRIO_MMAXIPRIO;
319 return default_iprio[irq] ? default_iprio[irq] : IPRIO_MMAXIPRIO;
322 static int riscv_cpu_pending_to_irq(CPURISCVState *env,
323 int extirq, unsigned int extirq_def_prio,
324 uint64_t pending, uint8_t *iprio)
326 int irq, best_irq = RISCV_EXCP_NONE;
327 unsigned int prio, best_prio = UINT_MAX;
330 return RISCV_EXCP_NONE;
333 irq = ctz64(pending);
334 if (!((extirq == IRQ_M_EXT) ? riscv_cpu_cfg(env)->ext_smaia :
335 riscv_cpu_cfg(env)->ext_ssaia)) {
339 pending = pending >> irq;
344 prio = extirq_def_prio;
346 prio = (riscv_cpu_default_priority(irq) < extirq_def_prio) ?
350 if ((pending & 0x1) && (prio <= best_prio)) {
355 pending = pending >> 1;
361 uint64_t riscv_cpu_all_pending(CPURISCVState *env)
363 uint32_t gein = get_field(env->hstatus, HSTATUS_VGEIN);
364 uint64_t vsgein = (env->hgeip & (1ULL << gein)) ? MIP_VSEIP : 0;
365 uint64_t vstip = (env->vstime_irq) ? MIP_VSTIP : 0;
367 return (env->mip | vsgein | vstip) & env->mie;
370 int riscv_cpu_mirq_pending(CPURISCVState *env)
372 uint64_t irqs = riscv_cpu_all_pending(env) & ~env->mideleg &
373 ~(MIP_SGEIP | MIP_VSSIP | MIP_VSTIP | MIP_VSEIP);
375 return riscv_cpu_pending_to_irq(env, IRQ_M_EXT, IPRIO_DEFAULT_M,
379 int riscv_cpu_sirq_pending(CPURISCVState *env)
381 uint64_t irqs = riscv_cpu_all_pending(env) & env->mideleg &
382 ~(MIP_VSSIP | MIP_VSTIP | MIP_VSEIP);
384 return riscv_cpu_pending_to_irq(env, IRQ_S_EXT, IPRIO_DEFAULT_S,
388 int riscv_cpu_vsirq_pending(CPURISCVState *env)
390 uint64_t irqs = riscv_cpu_all_pending(env) & env->mideleg &
391 (MIP_VSSIP | MIP_VSTIP | MIP_VSEIP);
393 return riscv_cpu_pending_to_irq(env, IRQ_S_EXT, IPRIO_DEFAULT_S,
394 irqs >> 1, env->hviprio);
397 static int riscv_cpu_local_irq_pending(CPURISCVState *env)
400 uint64_t irqs, pending, mie, hsie, vsie;
402 /* Determine interrupt enable state of all privilege modes */
403 if (env->virt_enabled) {
406 vsie = (env->priv < PRV_S) ||
407 (env->priv == PRV_S && get_field(env->mstatus, MSTATUS_SIE));
409 mie = (env->priv < PRV_M) ||
410 (env->priv == PRV_M && get_field(env->mstatus, MSTATUS_MIE));
411 hsie = (env->priv < PRV_S) ||
412 (env->priv == PRV_S && get_field(env->mstatus, MSTATUS_SIE));
416 /* Determine all pending interrupts */
417 pending = riscv_cpu_all_pending(env);
419 /* Check M-mode interrupts */
420 irqs = pending & ~env->mideleg & -mie;
422 return riscv_cpu_pending_to_irq(env, IRQ_M_EXT, IPRIO_DEFAULT_M,
426 /* Check HS-mode interrupts */
427 irqs = pending & env->mideleg & ~env->hideleg & -hsie;
429 return riscv_cpu_pending_to_irq(env, IRQ_S_EXT, IPRIO_DEFAULT_S,
433 /* Check VS-mode interrupts */
434 irqs = pending & env->mideleg & env->hideleg & -vsie;
436 virq = riscv_cpu_pending_to_irq(env, IRQ_S_EXT, IPRIO_DEFAULT_S,
437 irqs >> 1, env->hviprio);
438 return (virq <= 0) ? virq : virq + 1;
441 /* Indicate no pending interrupt */
442 return RISCV_EXCP_NONE;
445 bool riscv_cpu_exec_interrupt(CPUState *cs, int interrupt_request)
447 if (interrupt_request & CPU_INTERRUPT_HARD) {
448 RISCVCPU *cpu = RISCV_CPU(cs);
449 CPURISCVState *env = &cpu->env;
450 int interruptno = riscv_cpu_local_irq_pending(env);
451 if (interruptno >= 0) {
452 cs->exception_index = RISCV_EXCP_INT_FLAG | interruptno;
453 riscv_cpu_do_interrupt(cs);
460 /* Return true is floating point support is currently enabled */
461 bool riscv_cpu_fp_enabled(CPURISCVState *env)
463 if (env->mstatus & MSTATUS_FS) {
464 if (env->virt_enabled && !(env->mstatus_hs & MSTATUS_FS)) {
473 /* Return true is vector support is currently enabled */
474 bool riscv_cpu_vector_enabled(CPURISCVState *env)
476 if (env->mstatus & MSTATUS_VS) {
477 if (env->virt_enabled && !(env->mstatus_hs & MSTATUS_VS)) {
486 void riscv_cpu_swap_hypervisor_regs(CPURISCVState *env)
488 uint64_t mstatus_mask = MSTATUS_MXR | MSTATUS_SUM |
489 MSTATUS_SPP | MSTATUS_SPIE | MSTATUS_SIE |
490 MSTATUS64_UXL | MSTATUS_VS;
492 if (riscv_has_ext(env, RVF)) {
493 mstatus_mask |= MSTATUS_FS;
495 bool current_virt = env->virt_enabled;
497 g_assert(riscv_has_ext(env, RVH));
500 /* Current V=1 and we are about to change to V=0 */
501 env->vsstatus = env->mstatus & mstatus_mask;
502 env->mstatus &= ~mstatus_mask;
503 env->mstatus |= env->mstatus_hs;
505 env->vstvec = env->stvec;
506 env->stvec = env->stvec_hs;
508 env->vsscratch = env->sscratch;
509 env->sscratch = env->sscratch_hs;
511 env->vsepc = env->sepc;
512 env->sepc = env->sepc_hs;
514 env->vscause = env->scause;
515 env->scause = env->scause_hs;
517 env->vstval = env->stval;
518 env->stval = env->stval_hs;
520 env->vsatp = env->satp;
521 env->satp = env->satp_hs;
523 /* Current V=0 and we are about to change to V=1 */
524 env->mstatus_hs = env->mstatus & mstatus_mask;
525 env->mstatus &= ~mstatus_mask;
526 env->mstatus |= env->vsstatus;
528 env->stvec_hs = env->stvec;
529 env->stvec = env->vstvec;
531 env->sscratch_hs = env->sscratch;
532 env->sscratch = env->vsscratch;
534 env->sepc_hs = env->sepc;
535 env->sepc = env->vsepc;
537 env->scause_hs = env->scause;
538 env->scause = env->vscause;
540 env->stval_hs = env->stval;
541 env->stval = env->vstval;
543 env->satp_hs = env->satp;
544 env->satp = env->vsatp;
548 target_ulong riscv_cpu_get_geilen(CPURISCVState *env)
550 if (!riscv_has_ext(env, RVH)) {
557 void riscv_cpu_set_geilen(CPURISCVState *env, target_ulong geilen)
559 if (!riscv_has_ext(env, RVH)) {
563 if (geilen > (TARGET_LONG_BITS - 1)) {
567 env->geilen = geilen;
570 /* This function can only be called to set virt when RVH is enabled */
571 void riscv_cpu_set_virt_enabled(CPURISCVState *env, bool enable)
573 /* Flush the TLB on all virt mode changes. */
574 if (env->virt_enabled != enable) {
575 tlb_flush(env_cpu(env));
578 env->virt_enabled = enable;
582 * The guest external interrupts from an interrupt controller are
583 * delivered only when the Guest/VM is running (i.e. V=1). This means
584 * any guest external interrupt which is triggered while the Guest/VM
585 * is not running (i.e. V=0) will be missed on QEMU resulting in guest
586 * with sluggish response to serial console input and other I/O events.
588 * To solve this, we check and inject interrupt after setting V=1.
590 riscv_cpu_update_mip(env, 0, 0);
594 int riscv_cpu_claim_interrupts(RISCVCPU *cpu, uint64_t interrupts)
596 CPURISCVState *env = &cpu->env;
597 if (env->miclaim & interrupts) {
600 env->miclaim |= interrupts;
605 uint64_t riscv_cpu_update_mip(CPURISCVState *env, uint64_t mask,
608 CPUState *cs = env_cpu(env);
609 uint64_t gein, vsgein = 0, vstip = 0, old = env->mip;
611 if (env->virt_enabled) {
612 gein = get_field(env->hstatus, HSTATUS_VGEIN);
613 vsgein = (env->hgeip & (1ULL << gein)) ? MIP_VSEIP : 0;
616 vstip = env->vstime_irq ? MIP_VSTIP : 0;
618 QEMU_IOTHREAD_LOCK_GUARD();
620 env->mip = (env->mip & ~mask) | (value & mask);
622 if (env->mip | vsgein | vstip) {
623 cpu_interrupt(cs, CPU_INTERRUPT_HARD);
625 cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
631 void riscv_cpu_set_rdtime_fn(CPURISCVState *env, uint64_t (*fn)(void *),
635 env->rdtime_fn_arg = arg;
638 void riscv_cpu_set_aia_ireg_rmw_fn(CPURISCVState *env, uint32_t priv,
639 int (*rmw_fn)(void *arg,
642 target_ulong new_val,
643 target_ulong write_mask),
647 env->aia_ireg_rmw_fn[priv] = rmw_fn;
648 env->aia_ireg_rmw_fn_arg[priv] = rmw_fn_arg;
652 void riscv_cpu_set_mode(CPURISCVState *env, target_ulong newpriv)
654 g_assert(newpriv <= PRV_M && newpriv != PRV_RESERVED);
656 if (icount_enabled() && newpriv != env->priv) {
657 riscv_itrigger_update_priv(env);
659 /* tlb_flush is unnecessary as mode is contained in mmu_idx */
661 env->xl = cpu_recompute_xl(env);
662 riscv_cpu_update_mask(env);
665 * Clear the load reservation - otherwise a reservation placed in one
666 * context/process can be used by another, resulting in an SC succeeding
667 * incorrectly. Version 2.2 of the ISA specification explicitly requires
668 * this behaviour, while later revisions say that the kernel "should" use
669 * an SC instruction to force the yielding of a load reservation on a
670 * preemptive context switch. As a result, do both.
676 * get_physical_address_pmp - check PMP permission for this physical address
678 * Match the PMP region and check permission for this physical address and it's
679 * TLB page. Returns 0 if the permission checking was successful
681 * @env: CPURISCVState
682 * @prot: The returned protection attributes
683 * @tlb_size: TLB page size containing addr. It could be modified after PMP
684 * permission checking. NULL if not set TLB page for addr.
685 * @addr: The physical address to be checked permission
686 * @access_type: The type of MMU access
687 * @mode: Indicates current privilege level.
689 static int get_physical_address_pmp(CPURISCVState *env, int *prot,
690 target_ulong *tlb_size, hwaddr addr,
691 int size, MMUAccessType access_type,
697 if (!riscv_cpu_cfg(env)->pmp) {
698 *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
699 return TRANSLATE_SUCCESS;
702 pmp_index = pmp_hart_has_privs(env, addr, size, 1 << access_type,
706 return TRANSLATE_PMP_FAIL;
709 *prot = pmp_priv_to_page_prot(pmp_priv);
710 if ((tlb_size != NULL) && pmp_index != MAX_RISCV_PMPS) {
711 target_ulong tlb_sa = addr & ~(TARGET_PAGE_SIZE - 1);
712 target_ulong tlb_ea = tlb_sa + TARGET_PAGE_SIZE - 1;
714 *tlb_size = pmp_get_tlb_size(env, pmp_index, tlb_sa, tlb_ea);
717 return TRANSLATE_SUCCESS;
721 * get_physical_address - get the physical address for this virtual address
723 * Do a page table walk to obtain the physical address corresponding to a
724 * virtual address. Returns 0 if the translation was successful
726 * Adapted from Spike's mmu_t::translate and mmu_t::walk
728 * @env: CPURISCVState
729 * @physical: This will be set to the calculated physical address
730 * @prot: The returned protection attributes
731 * @addr: The virtual address or guest physical address to be translated
732 * @fault_pte_addr: If not NULL, this will be set to fault pte address
733 * when a error occurs on pte address translation.
734 * This will already be shifted to match htval.
735 * @access_type: The type of MMU access
736 * @mmu_idx: Indicates current privilege level
737 * @first_stage: Are we in first stage translation?
738 * Second stage is used for hypervisor guest translation
739 * @two_stage: Are we going to perform two stage translation
740 * @is_debug: Is this access from a debugger or the monitor?
742 static int get_physical_address(CPURISCVState *env, hwaddr *physical,
743 int *prot, vaddr addr,
744 target_ulong *fault_pte_addr,
745 int access_type, int mmu_idx,
746 bool first_stage, bool two_stage,
750 * NOTE: the env->pc value visible here will not be
751 * correct, but the value visible to the exception handler
752 * (riscv_cpu_do_interrupt) is correct
755 MemTxAttrs attrs = MEMTXATTRS_UNSPECIFIED;
756 int mode = mmuidx_priv(mmu_idx);
757 bool use_background = false;
760 target_ulong napot_mask;
763 * Check if we should use the background registers for the two
764 * stage translation. We don't need to check if we actually need
765 * two stage translation as that happened before this function
766 * was called. Background registers will be used if the guest has
767 * forced a two stage translation to be on (in HS or M mode).
769 if (!env->virt_enabled && two_stage) {
770 use_background = true;
773 if (first_stage == false) {
775 * We are in stage 2 translation, this is similar to stage 1.
776 * Stage 2 is always taken as U-mode
781 if (mode == PRV_M || !riscv_cpu_cfg(env)->mmu) {
783 *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
784 return TRANSLATE_SUCCESS;
790 int levels, ptidxbits, ptesize, vm, sum, mxr, widened;
792 if (first_stage == true) {
793 mxr = get_field(env->mstatus, MSTATUS_MXR);
795 mxr = get_field(env->vsstatus, MSTATUS_MXR);
798 if (first_stage == true) {
799 if (use_background) {
800 if (riscv_cpu_mxl(env) == MXL_RV32) {
801 base = (hwaddr)get_field(env->vsatp, SATP32_PPN) << PGSHIFT;
802 vm = get_field(env->vsatp, SATP32_MODE);
804 base = (hwaddr)get_field(env->vsatp, SATP64_PPN) << PGSHIFT;
805 vm = get_field(env->vsatp, SATP64_MODE);
808 if (riscv_cpu_mxl(env) == MXL_RV32) {
809 base = (hwaddr)get_field(env->satp, SATP32_PPN) << PGSHIFT;
810 vm = get_field(env->satp, SATP32_MODE);
812 base = (hwaddr)get_field(env->satp, SATP64_PPN) << PGSHIFT;
813 vm = get_field(env->satp, SATP64_MODE);
818 if (riscv_cpu_mxl(env) == MXL_RV32) {
819 base = (hwaddr)get_field(env->hgatp, SATP32_PPN) << PGSHIFT;
820 vm = get_field(env->hgatp, SATP32_MODE);
822 base = (hwaddr)get_field(env->hgatp, SATP64_PPN) << PGSHIFT;
823 vm = get_field(env->hgatp, SATP64_MODE);
827 /* status.SUM will be ignored if execute on background */
828 sum = mmuidx_sum(mmu_idx) || use_background || is_debug;
831 levels = 2; ptidxbits = 10; ptesize = 4; break;
833 levels = 3; ptidxbits = 9; ptesize = 8; break;
835 levels = 4; ptidxbits = 9; ptesize = 8; break;
837 levels = 5; ptidxbits = 9; ptesize = 8; break;
840 *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
841 return TRANSLATE_SUCCESS;
843 g_assert_not_reached();
846 CPUState *cs = env_cpu(env);
847 int va_bits = PGSHIFT + levels * ptidxbits + widened;
848 target_ulong mask, masked_msbs;
850 if (TARGET_LONG_BITS > (va_bits - 1)) {
851 mask = (1L << (TARGET_LONG_BITS - (va_bits - 1))) - 1;
855 masked_msbs = (addr >> (va_bits - 1)) & mask;
857 if (masked_msbs != 0 && masked_msbs != mask) {
858 return TRANSLATE_FAIL;
861 int ptshift = (levels - 1) * ptidxbits;
864 #if !TCG_OVERSIZED_GUEST
867 for (i = 0; i < levels; i++, ptshift -= ptidxbits) {
870 idx = (addr >> (PGSHIFT + ptshift)) &
871 ((1 << (ptidxbits + widened)) - 1);
873 idx = (addr >> (PGSHIFT + ptshift)) &
874 ((1 << ptidxbits) - 1);
877 /* check that physical address of PTE is legal */
880 if (two_stage && first_stage) {
884 /* Do the second stage translation on the base PTE address. */
885 int vbase_ret = get_physical_address(env, &vbase, &vbase_prot,
886 base, NULL, MMU_DATA_LOAD,
887 mmu_idx, false, true,
890 if (vbase_ret != TRANSLATE_SUCCESS) {
891 if (fault_pte_addr) {
892 *fault_pte_addr = (base + idx * ptesize) >> 2;
894 return TRANSLATE_G_STAGE_FAIL;
897 pte_addr = vbase + idx * ptesize;
899 pte_addr = base + idx * ptesize;
903 int pmp_ret = get_physical_address_pmp(env, &pmp_prot, NULL, pte_addr,
904 sizeof(target_ulong),
905 MMU_DATA_LOAD, PRV_S);
906 if (pmp_ret != TRANSLATE_SUCCESS) {
907 return TRANSLATE_PMP_FAIL;
911 if (riscv_cpu_mxl(env) == MXL_RV32) {
912 pte = address_space_ldl(cs->as, pte_addr, attrs, &res);
914 pte = address_space_ldq(cs->as, pte_addr, attrs, &res);
917 if (res != MEMTX_OK) {
918 return TRANSLATE_FAIL;
921 bool pbmte = env->menvcfg & MENVCFG_PBMTE;
922 bool hade = env->menvcfg & MENVCFG_HADE;
924 if (first_stage && two_stage && env->virt_enabled) {
925 pbmte = pbmte && (env->henvcfg & HENVCFG_PBMTE);
926 hade = hade && (env->henvcfg & HENVCFG_HADE);
929 if (riscv_cpu_sxl(env) == MXL_RV32) {
930 ppn = pte >> PTE_PPN_SHIFT;
931 } else if (pbmte || riscv_cpu_cfg(env)->ext_svnapot) {
932 ppn = (pte & (target_ulong)PTE_PPN_MASK) >> PTE_PPN_SHIFT;
934 ppn = pte >> PTE_PPN_SHIFT;
935 if ((pte & ~(target_ulong)PTE_PPN_MASK) >> PTE_PPN_SHIFT) {
936 return TRANSLATE_FAIL;
940 if (!(pte & PTE_V)) {
942 return TRANSLATE_FAIL;
943 } else if (!pbmte && (pte & PTE_PBMT)) {
944 return TRANSLATE_FAIL;
945 } else if (!(pte & (PTE_R | PTE_W | PTE_X))) {
946 /* Inner PTE, continue walking */
947 if (pte & (PTE_D | PTE_A | PTE_U | PTE_ATTR)) {
948 return TRANSLATE_FAIL;
950 base = ppn << PGSHIFT;
951 } else if ((pte & (PTE_R | PTE_W | PTE_X)) == PTE_W) {
952 /* Reserved leaf PTE flags: PTE_W */
953 return TRANSLATE_FAIL;
954 } else if ((pte & (PTE_R | PTE_W | PTE_X)) == (PTE_W | PTE_X)) {
955 /* Reserved leaf PTE flags: PTE_W + PTE_X */
956 return TRANSLATE_FAIL;
957 } else if ((pte & PTE_U) && ((mode != PRV_U) &&
958 (!sum || access_type == MMU_INST_FETCH))) {
959 /* User PTE flags when not U mode and mstatus.SUM is not set,
960 or the access type is an instruction fetch */
961 return TRANSLATE_FAIL;
962 } else if (!(pte & PTE_U) && (mode != PRV_S)) {
963 /* Supervisor PTE flags when not S mode */
964 return TRANSLATE_FAIL;
965 } else if (ppn & ((1ULL << ptshift) - 1)) {
967 return TRANSLATE_FAIL;
968 } else if (access_type == MMU_DATA_LOAD && !((pte & PTE_R) ||
969 ((pte & PTE_X) && mxr))) {
970 /* Read access check failed */
971 return TRANSLATE_FAIL;
972 } else if (access_type == MMU_DATA_STORE && !(pte & PTE_W)) {
973 /* Write access check failed */
974 return TRANSLATE_FAIL;
975 } else if (access_type == MMU_INST_FETCH && !(pte & PTE_X)) {
976 /* Fetch access check failed */
977 return TRANSLATE_FAIL;
979 /* if necessary, set accessed and dirty bits. */
980 target_ulong updated_pte = pte | PTE_A |
981 (access_type == MMU_DATA_STORE ? PTE_D : 0);
983 /* Page table updates need to be atomic with MTTCG enabled */
984 if (updated_pte != pte) {
986 return TRANSLATE_FAIL;
990 * - if accessed or dirty bits need updating, and the PTE is
991 * in RAM, then we do so atomically with a compare and swap.
992 * - if the PTE is in IO space or ROM, then it can't be updated
993 * and we return TRANSLATE_FAIL.
994 * - if the PTE changed by the time we went to update it, then
995 * it is no longer valid and we must re-walk the page table.
998 hwaddr l = sizeof(target_ulong), addr1;
999 mr = address_space_translate(cs->as, pte_addr, &addr1, &l,
1000 false, MEMTXATTRS_UNSPECIFIED);
1001 if (memory_region_is_ram(mr)) {
1002 target_ulong *pte_pa =
1003 qemu_map_ram_ptr(mr->ram_block, addr1);
1004 #if TCG_OVERSIZED_GUEST
1006 * MTTCG is not enabled on oversized TCG guests so
1007 * page table updates do not need to be atomic
1009 *pte_pa = pte = updated_pte;
1011 target_ulong old_pte =
1012 qatomic_cmpxchg(pte_pa, pte, updated_pte);
1013 if (old_pte != pte) {
1021 * misconfigured PTE in ROM (AD bits are not preset) or
1022 * PTE is in IO space and can't be updated atomically
1024 return TRANSLATE_FAIL;
1029 * for superpage mappings, make a fake leaf PTE for the TLB's
1032 target_ulong vpn = addr >> PGSHIFT;
1034 if (riscv_cpu_cfg(env)->ext_svnapot && (pte & PTE_N)) {
1035 napot_bits = ctzl(ppn) + 1;
1036 if ((i != (levels - 1)) || (napot_bits != 4)) {
1037 return TRANSLATE_FAIL;
1041 napot_mask = (1 << napot_bits) - 1;
1042 *physical = (((ppn & ~napot_mask) | (vpn & napot_mask) |
1043 (vpn & (((target_ulong)1 << ptshift) - 1))
1044 ) << PGSHIFT) | (addr & ~TARGET_PAGE_MASK);
1046 /* set permissions on the TLB entry */
1047 if ((pte & PTE_R) || ((pte & PTE_X) && mxr)) {
1054 * add write permission on stores or if the page is already dirty,
1055 * so that we TLB miss on later writes to update the dirty bit
1057 if ((pte & PTE_W) &&
1058 (access_type == MMU_DATA_STORE || (pte & PTE_D))) {
1059 *prot |= PAGE_WRITE;
1061 return TRANSLATE_SUCCESS;
1064 return TRANSLATE_FAIL;
1067 static void raise_mmu_exception(CPURISCVState *env, target_ulong address,
1068 MMUAccessType access_type, bool pmp_violation,
1069 bool first_stage, bool two_stage,
1070 bool two_stage_indirect)
1072 CPUState *cs = env_cpu(env);
1073 int page_fault_exceptions, vm;
1076 if (riscv_cpu_mxl(env) == MXL_RV32) {
1077 stap_mode = SATP32_MODE;
1079 stap_mode = SATP64_MODE;
1083 vm = get_field(env->satp, stap_mode);
1085 vm = get_field(env->hgatp, stap_mode);
1088 page_fault_exceptions = vm != VM_1_10_MBARE && !pmp_violation;
1090 switch (access_type) {
1091 case MMU_INST_FETCH:
1092 if (env->virt_enabled && !first_stage) {
1093 cs->exception_index = RISCV_EXCP_INST_GUEST_PAGE_FAULT;
1095 cs->exception_index = page_fault_exceptions ?
1096 RISCV_EXCP_INST_PAGE_FAULT : RISCV_EXCP_INST_ACCESS_FAULT;
1100 if (two_stage && !first_stage) {
1101 cs->exception_index = RISCV_EXCP_LOAD_GUEST_ACCESS_FAULT;
1103 cs->exception_index = page_fault_exceptions ?
1104 RISCV_EXCP_LOAD_PAGE_FAULT : RISCV_EXCP_LOAD_ACCESS_FAULT;
1107 case MMU_DATA_STORE:
1108 if (two_stage && !first_stage) {
1109 cs->exception_index = RISCV_EXCP_STORE_GUEST_AMO_ACCESS_FAULT;
1111 cs->exception_index = page_fault_exceptions ?
1112 RISCV_EXCP_STORE_PAGE_FAULT :
1113 RISCV_EXCP_STORE_AMO_ACCESS_FAULT;
1117 g_assert_not_reached();
1119 env->badaddr = address;
1120 env->two_stage_lookup = two_stage;
1121 env->two_stage_indirect_lookup = two_stage_indirect;
1124 hwaddr riscv_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
1126 RISCVCPU *cpu = RISCV_CPU(cs);
1127 CPURISCVState *env = &cpu->env;
1130 int mmu_idx = cpu_mmu_index(&cpu->env, false);
1132 if (get_physical_address(env, &phys_addr, &prot, addr, NULL, 0, mmu_idx,
1133 true, env->virt_enabled, true)) {
1137 if (env->virt_enabled) {
1138 if (get_physical_address(env, &phys_addr, &prot, phys_addr, NULL,
1139 0, mmu_idx, false, true, true)) {
1144 return phys_addr & TARGET_PAGE_MASK;
1147 void riscv_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr,
1148 vaddr addr, unsigned size,
1149 MMUAccessType access_type,
1150 int mmu_idx, MemTxAttrs attrs,
1151 MemTxResult response, uintptr_t retaddr)
1153 RISCVCPU *cpu = RISCV_CPU(cs);
1154 CPURISCVState *env = &cpu->env;
1156 if (access_type == MMU_DATA_STORE) {
1157 cs->exception_index = RISCV_EXCP_STORE_AMO_ACCESS_FAULT;
1158 } else if (access_type == MMU_DATA_LOAD) {
1159 cs->exception_index = RISCV_EXCP_LOAD_ACCESS_FAULT;
1161 cs->exception_index = RISCV_EXCP_INST_ACCESS_FAULT;
1164 env->badaddr = addr;
1165 env->two_stage_lookup = env->virt_enabled || mmuidx_2stage(mmu_idx);
1166 env->two_stage_indirect_lookup = false;
1167 cpu_loop_exit_restore(cs, retaddr);
1170 void riscv_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
1171 MMUAccessType access_type, int mmu_idx,
1174 RISCVCPU *cpu = RISCV_CPU(cs);
1175 CPURISCVState *env = &cpu->env;
1176 switch (access_type) {
1177 case MMU_INST_FETCH:
1178 cs->exception_index = RISCV_EXCP_INST_ADDR_MIS;
1181 cs->exception_index = RISCV_EXCP_LOAD_ADDR_MIS;
1183 case MMU_DATA_STORE:
1184 cs->exception_index = RISCV_EXCP_STORE_AMO_ADDR_MIS;
1187 g_assert_not_reached();
1189 env->badaddr = addr;
1190 env->two_stage_lookup = env->virt_enabled || mmuidx_2stage(mmu_idx);
1191 env->two_stage_indirect_lookup = false;
1192 cpu_loop_exit_restore(cs, retaddr);
1196 static void pmu_tlb_fill_incr_ctr(RISCVCPU *cpu, MMUAccessType access_type)
1198 enum riscv_pmu_event_idx pmu_event_type;
1200 switch (access_type) {
1201 case MMU_INST_FETCH:
1202 pmu_event_type = RISCV_PMU_EVENT_CACHE_ITLB_PREFETCH_MISS;
1205 pmu_event_type = RISCV_PMU_EVENT_CACHE_DTLB_READ_MISS;
1207 case MMU_DATA_STORE:
1208 pmu_event_type = RISCV_PMU_EVENT_CACHE_DTLB_WRITE_MISS;
1214 riscv_pmu_incr_ctr(cpu, pmu_event_type);
1217 bool riscv_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
1218 MMUAccessType access_type, int mmu_idx,
1219 bool probe, uintptr_t retaddr)
1221 RISCVCPU *cpu = RISCV_CPU(cs);
1222 CPURISCVState *env = &cpu->env;
1225 int prot, prot2, prot_pmp;
1226 bool pmp_violation = false;
1227 bool first_stage_error = true;
1228 bool two_stage_lookup = false;
1229 bool two_stage_indirect_error = false;
1230 int ret = TRANSLATE_FAIL;
1232 /* default TLB page size */
1233 target_ulong tlb_size = TARGET_PAGE_SIZE;
1235 env->guest_phys_fault_addr = 0;
1237 qemu_log_mask(CPU_LOG_MMU, "%s ad %" VADDR_PRIx " rw %d mmu_idx %d\n",
1238 __func__, address, access_type, mmu_idx);
1241 * MPRV does not affect the virtual-machine load/store
1242 * instructions, HLV, HLVX, and HSV.
1244 if (mmuidx_2stage(mmu_idx)) {
1246 } else if (mode == PRV_M && access_type != MMU_INST_FETCH &&
1247 get_field(env->mstatus, MSTATUS_MPRV)) {
1248 mode = get_field(env->mstatus, MSTATUS_MPP);
1249 if (riscv_has_ext(env, RVH) && get_field(env->mstatus, MSTATUS_MPV)) {
1250 two_stage_lookup = true;
1254 pmu_tlb_fill_incr_ctr(cpu, access_type);
1255 if (env->virt_enabled ||
1256 ((mmuidx_2stage(mmu_idx) || two_stage_lookup) &&
1257 access_type != MMU_INST_FETCH)) {
1258 /* Two stage lookup */
1259 ret = get_physical_address(env, &pa, &prot, address,
1260 &env->guest_phys_fault_addr, access_type,
1261 mmu_idx, true, true, false);
1264 * A G-stage exception may be triggered during two state lookup.
1265 * And the env->guest_phys_fault_addr has already been set in
1266 * get_physical_address().
1268 if (ret == TRANSLATE_G_STAGE_FAIL) {
1269 first_stage_error = false;
1270 two_stage_indirect_error = true;
1271 access_type = MMU_DATA_LOAD;
1274 qemu_log_mask(CPU_LOG_MMU,
1275 "%s 1st-stage address=%" VADDR_PRIx " ret %d physical "
1276 HWADDR_FMT_plx " prot %d\n",
1277 __func__, address, ret, pa, prot);
1279 if (ret == TRANSLATE_SUCCESS) {
1280 /* Second stage lookup */
1283 ret = get_physical_address(env, &pa, &prot2, im_address, NULL,
1284 access_type, mmu_idx, false, true,
1287 qemu_log_mask(CPU_LOG_MMU,
1288 "%s 2nd-stage address=%" VADDR_PRIx
1290 HWADDR_FMT_plx " prot %d\n",
1291 __func__, im_address, ret, pa, prot2);
1295 if (ret == TRANSLATE_SUCCESS) {
1296 ret = get_physical_address_pmp(env, &prot_pmp, &tlb_size, pa,
1297 size, access_type, mode);
1299 qemu_log_mask(CPU_LOG_MMU,
1300 "%s PMP address=" HWADDR_FMT_plx " ret %d prot"
1301 " %d tlb_size " TARGET_FMT_lu "\n",
1302 __func__, pa, ret, prot_pmp, tlb_size);
1307 if (ret != TRANSLATE_SUCCESS) {
1309 * Guest physical address translation failed, this is a HS
1312 first_stage_error = false;
1313 env->guest_phys_fault_addr = (im_address |
1315 (TARGET_PAGE_SIZE - 1))) >> 2;
1319 /* Single stage lookup */
1320 ret = get_physical_address(env, &pa, &prot, address, NULL,
1321 access_type, mmu_idx, true, false, false);
1323 qemu_log_mask(CPU_LOG_MMU,
1324 "%s address=%" VADDR_PRIx " ret %d physical "
1325 HWADDR_FMT_plx " prot %d\n",
1326 __func__, address, ret, pa, prot);
1328 if (ret == TRANSLATE_SUCCESS) {
1329 ret = get_physical_address_pmp(env, &prot_pmp, &tlb_size, pa,
1330 size, access_type, mode);
1332 qemu_log_mask(CPU_LOG_MMU,
1333 "%s PMP address=" HWADDR_FMT_plx " ret %d prot"
1334 " %d tlb_size " TARGET_FMT_lu "\n",
1335 __func__, pa, ret, prot_pmp, tlb_size);
1341 if (ret == TRANSLATE_PMP_FAIL) {
1342 pmp_violation = true;
1345 if (ret == TRANSLATE_SUCCESS) {
1346 tlb_set_page(cs, address & ~(tlb_size - 1), pa & ~(tlb_size - 1),
1347 prot, mmu_idx, tlb_size);
1352 raise_mmu_exception(env, address, access_type, pmp_violation,
1354 env->virt_enabled || mmuidx_2stage(mmu_idx),
1355 two_stage_indirect_error);
1356 cpu_loop_exit_restore(cs, retaddr);
1362 static target_ulong riscv_transformed_insn(CPURISCVState *env,
1366 target_ulong xinsn = 0;
1367 target_ulong access_rs1 = 0, access_imm = 0, access_size = 0;
1370 * Only Quadrant 0 and Quadrant 2 of RVC instruction space need to
1371 * be uncompressed. The Quadrant 1 of RVC instruction space need
1372 * not be transformed because these instructions won't generate
1373 * any load/store trap.
1376 if ((insn & 0x3) != 0x3) {
1377 /* Transform 16bit instruction into 32bit instruction */
1378 switch (GET_C_OP(insn)) {
1379 case OPC_RISC_C_OP_QUAD0: /* Quadrant 0 */
1380 switch (GET_C_FUNC(insn)) {
1381 case OPC_RISC_C_FUNC_FLD_LQ:
1382 if (riscv_cpu_xlen(env) != 128) { /* C.FLD (RV32/64) */
1383 xinsn = OPC_RISC_FLD;
1384 xinsn = SET_RD(xinsn, GET_C_RS2S(insn));
1385 access_rs1 = GET_C_RS1S(insn);
1386 access_imm = GET_C_LD_IMM(insn);
1390 case OPC_RISC_C_FUNC_LW: /* C.LW */
1391 xinsn = OPC_RISC_LW;
1392 xinsn = SET_RD(xinsn, GET_C_RS2S(insn));
1393 access_rs1 = GET_C_RS1S(insn);
1394 access_imm = GET_C_LW_IMM(insn);
1397 case OPC_RISC_C_FUNC_FLW_LD:
1398 if (riscv_cpu_xlen(env) == 32) { /* C.FLW (RV32) */
1399 xinsn = OPC_RISC_FLW;
1400 xinsn = SET_RD(xinsn, GET_C_RS2S(insn));
1401 access_rs1 = GET_C_RS1S(insn);
1402 access_imm = GET_C_LW_IMM(insn);
1404 } else { /* C.LD (RV64/RV128) */
1405 xinsn = OPC_RISC_LD;
1406 xinsn = SET_RD(xinsn, GET_C_RS2S(insn));
1407 access_rs1 = GET_C_RS1S(insn);
1408 access_imm = GET_C_LD_IMM(insn);
1412 case OPC_RISC_C_FUNC_FSD_SQ:
1413 if (riscv_cpu_xlen(env) != 128) { /* C.FSD (RV32/64) */
1414 xinsn = OPC_RISC_FSD;
1415 xinsn = SET_RS2(xinsn, GET_C_RS2S(insn));
1416 access_rs1 = GET_C_RS1S(insn);
1417 access_imm = GET_C_SD_IMM(insn);
1421 case OPC_RISC_C_FUNC_SW: /* C.SW */
1422 xinsn = OPC_RISC_SW;
1423 xinsn = SET_RS2(xinsn, GET_C_RS2S(insn));
1424 access_rs1 = GET_C_RS1S(insn);
1425 access_imm = GET_C_SW_IMM(insn);
1428 case OPC_RISC_C_FUNC_FSW_SD:
1429 if (riscv_cpu_xlen(env) == 32) { /* C.FSW (RV32) */
1430 xinsn = OPC_RISC_FSW;
1431 xinsn = SET_RS2(xinsn, GET_C_RS2S(insn));
1432 access_rs1 = GET_C_RS1S(insn);
1433 access_imm = GET_C_SW_IMM(insn);
1435 } else { /* C.SD (RV64/RV128) */
1436 xinsn = OPC_RISC_SD;
1437 xinsn = SET_RS2(xinsn, GET_C_RS2S(insn));
1438 access_rs1 = GET_C_RS1S(insn);
1439 access_imm = GET_C_SD_IMM(insn);
1447 case OPC_RISC_C_OP_QUAD2: /* Quadrant 2 */
1448 switch (GET_C_FUNC(insn)) {
1449 case OPC_RISC_C_FUNC_FLDSP_LQSP:
1450 if (riscv_cpu_xlen(env) != 128) { /* C.FLDSP (RV32/64) */
1451 xinsn = OPC_RISC_FLD;
1452 xinsn = SET_RD(xinsn, GET_C_RD(insn));
1454 access_imm = GET_C_LDSP_IMM(insn);
1458 case OPC_RISC_C_FUNC_LWSP: /* C.LWSP */
1459 xinsn = OPC_RISC_LW;
1460 xinsn = SET_RD(xinsn, GET_C_RD(insn));
1462 access_imm = GET_C_LWSP_IMM(insn);
1465 case OPC_RISC_C_FUNC_FLWSP_LDSP:
1466 if (riscv_cpu_xlen(env) == 32) { /* C.FLWSP (RV32) */
1467 xinsn = OPC_RISC_FLW;
1468 xinsn = SET_RD(xinsn, GET_C_RD(insn));
1470 access_imm = GET_C_LWSP_IMM(insn);
1472 } else { /* C.LDSP (RV64/RV128) */
1473 xinsn = OPC_RISC_LD;
1474 xinsn = SET_RD(xinsn, GET_C_RD(insn));
1476 access_imm = GET_C_LDSP_IMM(insn);
1480 case OPC_RISC_C_FUNC_FSDSP_SQSP:
1481 if (riscv_cpu_xlen(env) != 128) { /* C.FSDSP (RV32/64) */
1482 xinsn = OPC_RISC_FSD;
1483 xinsn = SET_RS2(xinsn, GET_C_RS2(insn));
1485 access_imm = GET_C_SDSP_IMM(insn);
1489 case OPC_RISC_C_FUNC_SWSP: /* C.SWSP */
1490 xinsn = OPC_RISC_SW;
1491 xinsn = SET_RS2(xinsn, GET_C_RS2(insn));
1493 access_imm = GET_C_SWSP_IMM(insn);
1497 if (riscv_cpu_xlen(env) == 32) { /* C.FSWSP (RV32) */
1498 xinsn = OPC_RISC_FSW;
1499 xinsn = SET_RS2(xinsn, GET_C_RS2(insn));
1501 access_imm = GET_C_SWSP_IMM(insn);
1503 } else { /* C.SDSP (RV64/RV128) */
1504 xinsn = OPC_RISC_SD;
1505 xinsn = SET_RS2(xinsn, GET_C_RS2(insn));
1507 access_imm = GET_C_SDSP_IMM(insn);
1520 * Clear Bit1 of transformed instruction to indicate that
1521 * original insruction was a 16bit instruction
1523 xinsn &= ~((target_ulong)0x2);
1525 /* Transform 32bit (or wider) instructions */
1526 switch (MASK_OP_MAJOR(insn)) {
1527 case OPC_RISC_ATOMIC:
1529 access_rs1 = GET_RS1(insn);
1530 access_size = 1 << GET_FUNCT3(insn);
1533 case OPC_RISC_FP_LOAD:
1534 xinsn = SET_I_IMM(insn, 0);
1535 access_rs1 = GET_RS1(insn);
1536 access_imm = GET_IMM(insn);
1537 access_size = 1 << GET_FUNCT3(insn);
1539 case OPC_RISC_STORE:
1540 case OPC_RISC_FP_STORE:
1541 xinsn = SET_S_IMM(insn, 0);
1542 access_rs1 = GET_RS1(insn);
1543 access_imm = GET_STORE_IMM(insn);
1544 access_size = 1 << GET_FUNCT3(insn);
1546 case OPC_RISC_SYSTEM:
1547 if (MASK_OP_SYSTEM(insn) == OPC_RISC_HLVHSV) {
1549 access_rs1 = GET_RS1(insn);
1550 access_size = 1 << ((GET_FUNCT7(insn) >> 1) & 0x3);
1551 access_size = 1 << access_size;
1560 xinsn = SET_RS1(xinsn, (taddr - (env->gpr[access_rs1] + access_imm)) &
1566 #endif /* !CONFIG_USER_ONLY */
1571 * Adapted from Spike's processor_t::take_trap.
1574 void riscv_cpu_do_interrupt(CPUState *cs)
1576 #if !defined(CONFIG_USER_ONLY)
1578 RISCVCPU *cpu = RISCV_CPU(cs);
1579 CPURISCVState *env = &cpu->env;
1580 bool write_gva = false;
1584 * cs->exception is 32-bits wide unlike mcause which is XLEN-bits wide
1585 * so we mask off the MSB and separate into trap type and cause.
1587 bool async = !!(cs->exception_index & RISCV_EXCP_INT_FLAG);
1588 target_ulong cause = cs->exception_index & RISCV_EXCP_INT_MASK;
1589 uint64_t deleg = async ? env->mideleg : env->medeleg;
1590 target_ulong tval = 0;
1591 target_ulong tinst = 0;
1592 target_ulong htval = 0;
1593 target_ulong mtval2 = 0;
1595 if (cause == RISCV_EXCP_SEMIHOST) {
1596 do_common_semihosting(cs);
1602 /* set tval to badaddr for traps with address information */
1604 case RISCV_EXCP_LOAD_GUEST_ACCESS_FAULT:
1605 case RISCV_EXCP_STORE_GUEST_AMO_ACCESS_FAULT:
1606 case RISCV_EXCP_LOAD_ADDR_MIS:
1607 case RISCV_EXCP_STORE_AMO_ADDR_MIS:
1608 case RISCV_EXCP_LOAD_ACCESS_FAULT:
1609 case RISCV_EXCP_STORE_AMO_ACCESS_FAULT:
1610 case RISCV_EXCP_LOAD_PAGE_FAULT:
1611 case RISCV_EXCP_STORE_PAGE_FAULT:
1612 write_gva = env->two_stage_lookup;
1613 tval = env->badaddr;
1614 if (env->two_stage_indirect_lookup) {
1616 * special pseudoinstruction for G-stage fault taken while
1617 * doing VS-stage page table walk.
1619 tinst = (riscv_cpu_xlen(env) == 32) ? 0x00002000 : 0x00003000;
1622 * The "Addr. Offset" field in transformed instruction is
1623 * non-zero only for misaligned access.
1625 tinst = riscv_transformed_insn(env, env->bins, tval);
1628 case RISCV_EXCP_INST_GUEST_PAGE_FAULT:
1629 case RISCV_EXCP_INST_ADDR_MIS:
1630 case RISCV_EXCP_INST_ACCESS_FAULT:
1631 case RISCV_EXCP_INST_PAGE_FAULT:
1632 write_gva = env->two_stage_lookup;
1633 tval = env->badaddr;
1634 if (env->two_stage_indirect_lookup) {
1636 * special pseudoinstruction for G-stage fault taken while
1637 * doing VS-stage page table walk.
1639 tinst = (riscv_cpu_xlen(env) == 32) ? 0x00002000 : 0x00003000;
1642 case RISCV_EXCP_ILLEGAL_INST:
1643 case RISCV_EXCP_VIRT_INSTRUCTION_FAULT:
1646 case RISCV_EXCP_BREAKPOINT:
1647 if (cs->watchpoint_hit) {
1648 tval = cs->watchpoint_hit->hitaddr;
1649 cs->watchpoint_hit = NULL;
1655 /* ecall is dispatched as one cause so translate based on mode */
1656 if (cause == RISCV_EXCP_U_ECALL) {
1657 assert(env->priv <= 3);
1659 if (env->priv == PRV_M) {
1660 cause = RISCV_EXCP_M_ECALL;
1661 } else if (env->priv == PRV_S && env->virt_enabled) {
1662 cause = RISCV_EXCP_VS_ECALL;
1663 } else if (env->priv == PRV_S && !env->virt_enabled) {
1664 cause = RISCV_EXCP_S_ECALL;
1665 } else if (env->priv == PRV_U) {
1666 cause = RISCV_EXCP_U_ECALL;
1671 trace_riscv_trap(env->mhartid, async, cause, env->pc, tval,
1672 riscv_cpu_get_trap_name(cause, async));
1674 qemu_log_mask(CPU_LOG_INT,
1675 "%s: hart:"TARGET_FMT_ld", async:%d, cause:"TARGET_FMT_lx", "
1676 "epc:0x"TARGET_FMT_lx", tval:0x"TARGET_FMT_lx", desc=%s\n",
1677 __func__, env->mhartid, async, cause, env->pc, tval,
1678 riscv_cpu_get_trap_name(cause, async));
1680 if (env->priv <= PRV_S &&
1681 cause < TARGET_LONG_BITS && ((deleg >> cause) & 1)) {
1682 /* handle the trap in S-mode */
1683 if (riscv_has_ext(env, RVH)) {
1684 uint64_t hdeleg = async ? env->hideleg : env->hedeleg;
1686 if (env->virt_enabled && ((hdeleg >> cause) & 1)) {
1687 /* Trap to VS mode */
1689 * See if we need to adjust cause. Yes if its VS mode interrupt
1690 * no if hypervisor has delegated one of hs mode's interrupt
1692 if (cause == IRQ_VS_TIMER || cause == IRQ_VS_SOFT ||
1693 cause == IRQ_VS_EXT) {
1697 } else if (env->virt_enabled) {
1698 /* Trap into HS mode, from virt */
1699 riscv_cpu_swap_hypervisor_regs(env);
1700 env->hstatus = set_field(env->hstatus, HSTATUS_SPVP,
1702 env->hstatus = set_field(env->hstatus, HSTATUS_SPV, true);
1704 htval = env->guest_phys_fault_addr;
1706 riscv_cpu_set_virt_enabled(env, 0);
1708 /* Trap into HS mode */
1709 env->hstatus = set_field(env->hstatus, HSTATUS_SPV, false);
1710 htval = env->guest_phys_fault_addr;
1712 env->hstatus = set_field(env->hstatus, HSTATUS_GVA, write_gva);
1716 s = set_field(s, MSTATUS_SPIE, get_field(s, MSTATUS_SIE));
1717 s = set_field(s, MSTATUS_SPP, env->priv);
1718 s = set_field(s, MSTATUS_SIE, 0);
1720 env->scause = cause | ((target_ulong)async << (TARGET_LONG_BITS - 1));
1721 env->sepc = env->pc;
1724 env->htinst = tinst;
1725 env->pc = (env->stvec >> 2 << 2) +
1726 ((async && (env->stvec & 3) == 1) ? cause * 4 : 0);
1727 riscv_cpu_set_mode(env, PRV_S);
1729 /* handle the trap in M-mode */
1730 if (riscv_has_ext(env, RVH)) {
1731 if (env->virt_enabled) {
1732 riscv_cpu_swap_hypervisor_regs(env);
1734 env->mstatus = set_field(env->mstatus, MSTATUS_MPV,
1736 if (env->virt_enabled && tval) {
1737 env->mstatus = set_field(env->mstatus, MSTATUS_GVA, 1);
1740 mtval2 = env->guest_phys_fault_addr;
1742 /* Trapping to M mode, virt is disabled */
1743 riscv_cpu_set_virt_enabled(env, 0);
1747 s = set_field(s, MSTATUS_MPIE, get_field(s, MSTATUS_MIE));
1748 s = set_field(s, MSTATUS_MPP, env->priv);
1749 s = set_field(s, MSTATUS_MIE, 0);
1751 env->mcause = cause | ~(((target_ulong)-1) >> async);
1752 env->mepc = env->pc;
1754 env->mtval2 = mtval2;
1755 env->mtinst = tinst;
1756 env->pc = (env->mtvec >> 2 << 2) +
1757 ((async && (env->mtvec & 3) == 1) ? cause * 4 : 0);
1758 riscv_cpu_set_mode(env, PRV_M);
1762 * NOTE: it is not necessary to yield load reservations here. It is only
1763 * necessary for an SC from "another hart" to cause a load reservation
1764 * to be yielded. Refer to the memory consistency model section of the
1765 * RISC-V ISA Specification.
1768 env->two_stage_lookup = false;
1769 env->two_stage_indirect_lookup = false;
1771 cs->exception_index = RISCV_EXCP_NONE; /* mark handled to qemu */