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
40 bool virt = env->virt_enabled;
43 /* All priv -> mmu_idx mapping are here */
45 uint64_t status = env->mstatus;
47 if (mode == PRV_M && get_field(status, MSTATUS_MPRV)) {
48 mode = get_field(env->mstatus, MSTATUS_MPP);
49 virt = get_field(env->mstatus, MSTATUS_MPV);
51 status = env->vsstatus;
54 if (mode == PRV_S && get_field(status, MSTATUS_SUM)) {
59 return mode | (virt ? MMU_2STAGE_BIT : 0);
63 void cpu_get_tb_cpu_state(CPURISCVState *env, target_ulong *pc,
64 target_ulong *cs_base, uint32_t *pflags)
66 CPUState *cs = env_cpu(env);
67 RISCVCPU *cpu = RISCV_CPU(cs);
68 RISCVExtStatus fs, vs;
71 *pc = env->xl == MXL_RV32 ? env->pc & UINT32_MAX : env->pc;
74 if (cpu->cfg.ext_zve32f) {
76 * If env->vl equals to VLMAX, we can use generic vector operation
77 * expanders (GVEC) to accerlate the vector operations.
78 * However, as LMUL could be a fractional number. The maximum
79 * vector size can be operated might be less than 8 bytes,
80 * which is not supported by GVEC. So we set vl_eq_vlmax flag to true
81 * only when maxsz >= 8 bytes.
83 uint32_t vlmax = vext_get_vlmax(cpu, env->vtype);
84 uint32_t sew = FIELD_EX64(env->vtype, VTYPE, VSEW);
85 uint32_t maxsz = vlmax << sew;
86 bool vl_eq_vlmax = (env->vstart == 0) && (vlmax == env->vl) &&
88 flags = FIELD_DP32(flags, TB_FLAGS, VILL, env->vill);
89 flags = FIELD_DP32(flags, TB_FLAGS, SEW, sew);
90 flags = FIELD_DP32(flags, TB_FLAGS, LMUL,
91 FIELD_EX64(env->vtype, VTYPE, VLMUL));
92 flags = FIELD_DP32(flags, TB_FLAGS, VL_EQ_VLMAX, vl_eq_vlmax);
93 flags = FIELD_DP32(flags, TB_FLAGS, VTA,
94 FIELD_EX64(env->vtype, VTYPE, VTA));
95 flags = FIELD_DP32(flags, TB_FLAGS, VMA,
96 FIELD_EX64(env->vtype, VTYPE, VMA));
97 flags = FIELD_DP32(flags, TB_FLAGS, VSTART_EQ_ZERO, env->vstart == 0);
99 flags = FIELD_DP32(flags, TB_FLAGS, VILL, 1);
102 #ifdef CONFIG_USER_ONLY
103 fs = EXT_STATUS_DIRTY;
104 vs = EXT_STATUS_DIRTY;
106 flags = FIELD_DP32(flags, TB_FLAGS, PRIV, env->priv);
108 flags |= cpu_mmu_index(env, 0);
109 fs = get_field(env->mstatus, MSTATUS_FS);
110 vs = get_field(env->mstatus, MSTATUS_VS);
112 if (env->virt_enabled) {
113 flags = FIELD_DP32(flags, TB_FLAGS, VIRT_ENABLED, 1);
115 * Merge DISABLED and !DIRTY states using MIN.
116 * We will set both fields when dirtying.
118 fs = MIN(fs, get_field(env->mstatus_hs, MSTATUS_FS));
119 vs = MIN(vs, get_field(env->mstatus_hs, MSTATUS_VS));
122 if (cpu->cfg.debug && !icount_enabled()) {
123 flags = FIELD_DP32(flags, TB_FLAGS, ITRIGGER, env->itrigger_enabled);
127 flags = FIELD_DP32(flags, TB_FLAGS, FS, fs);
128 flags = FIELD_DP32(flags, TB_FLAGS, VS, vs);
129 flags = FIELD_DP32(flags, TB_FLAGS, XL, env->xl);
130 if (env->cur_pmmask < (env->xl == MXL_RV32 ? UINT32_MAX : UINT64_MAX)) {
131 flags = FIELD_DP32(flags, TB_FLAGS, PM_MASK_ENABLED, 1);
133 if (env->cur_pmbase != 0) {
134 flags = FIELD_DP32(flags, TB_FLAGS, PM_BASE_ENABLED, 1);
140 void riscv_cpu_update_mask(CPURISCVState *env)
142 target_ulong mask = -1, base = 0;
144 * TODO: Current RVJ spec does not specify
145 * how the extension interacts with XLEN.
147 #ifndef CONFIG_USER_ONLY
148 if (riscv_has_ext(env, RVJ)) {
151 if (env->mmte & M_PM_ENABLE) {
157 if (env->mmte & S_PM_ENABLE) {
163 if (env->mmte & U_PM_ENABLE) {
169 g_assert_not_reached();
173 if (env->xl == MXL_RV32) {
174 env->cur_pmmask = mask & UINT32_MAX;
175 env->cur_pmbase = base & UINT32_MAX;
177 env->cur_pmmask = mask;
178 env->cur_pmbase = base;
182 #ifndef CONFIG_USER_ONLY
185 * The HS-mode is allowed to configure priority only for the
186 * following VS-mode local interrupts:
188 * 0 (Reserved interrupt, reads as zero)
189 * 1 Supervisor software interrupt
190 * 4 (Reserved interrupt, reads as zero)
191 * 5 Supervisor timer interrupt
192 * 8 (Reserved interrupt, reads as zero)
193 * 13 (Reserved interrupt)
206 static const int hviprio_index2irq[] = {
207 0, 1, 4, 5, 8, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23 };
208 static const int hviprio_index2rdzero[] = {
209 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
211 int riscv_cpu_hviprio_index2irq(int index, int *out_irq, int *out_rdzero)
213 if (index < 0 || ARRAY_SIZE(hviprio_index2irq) <= index) {
218 *out_irq = hviprio_index2irq[index];
222 *out_rdzero = hviprio_index2rdzero[index];
229 * Default priorities of local interrupts are defined in the
230 * RISC-V Advanced Interrupt Architecture specification.
232 * ----------------------------------------------------------------
234 * Priority | Major Interrupt Numbers
235 * ----------------------------------------------------------------
236 * Highest | 47, 23, 46, 45, 22, 44,
237 * | 43, 21, 42, 41, 20, 40
239 * | 11 (0b), 3 (03), 7 (07)
240 * | 9 (09), 1 (01), 5 (05)
242 * | 10 (0a), 2 (02), 6 (06)
244 * | 39, 19, 38, 37, 18, 36,
245 * Lowest | 35, 17, 34, 33, 16, 32
246 * ----------------------------------------------------------------
248 static const uint8_t default_iprio[64] = {
249 /* Custom interrupts 48 to 63 */
250 [63] = IPRIO_MMAXIPRIO,
251 [62] = IPRIO_MMAXIPRIO,
252 [61] = IPRIO_MMAXIPRIO,
253 [60] = IPRIO_MMAXIPRIO,
254 [59] = IPRIO_MMAXIPRIO,
255 [58] = IPRIO_MMAXIPRIO,
256 [57] = IPRIO_MMAXIPRIO,
257 [56] = IPRIO_MMAXIPRIO,
258 [55] = IPRIO_MMAXIPRIO,
259 [54] = IPRIO_MMAXIPRIO,
260 [53] = IPRIO_MMAXIPRIO,
261 [52] = IPRIO_MMAXIPRIO,
262 [51] = IPRIO_MMAXIPRIO,
263 [50] = IPRIO_MMAXIPRIO,
264 [49] = IPRIO_MMAXIPRIO,
265 [48] = IPRIO_MMAXIPRIO,
267 /* Custom interrupts 24 to 31 */
268 [31] = IPRIO_MMAXIPRIO,
269 [30] = IPRIO_MMAXIPRIO,
270 [29] = IPRIO_MMAXIPRIO,
271 [28] = IPRIO_MMAXIPRIO,
272 [27] = IPRIO_MMAXIPRIO,
273 [26] = IPRIO_MMAXIPRIO,
274 [25] = IPRIO_MMAXIPRIO,
275 [24] = IPRIO_MMAXIPRIO,
277 [47] = IPRIO_DEFAULT_UPPER,
278 [23] = IPRIO_DEFAULT_UPPER + 1,
279 [46] = IPRIO_DEFAULT_UPPER + 2,
280 [45] = IPRIO_DEFAULT_UPPER + 3,
281 [22] = IPRIO_DEFAULT_UPPER + 4,
282 [44] = IPRIO_DEFAULT_UPPER + 5,
284 [43] = IPRIO_DEFAULT_UPPER + 6,
285 [21] = IPRIO_DEFAULT_UPPER + 7,
286 [42] = IPRIO_DEFAULT_UPPER + 8,
287 [41] = IPRIO_DEFAULT_UPPER + 9,
288 [20] = IPRIO_DEFAULT_UPPER + 10,
289 [40] = IPRIO_DEFAULT_UPPER + 11,
291 [11] = IPRIO_DEFAULT_M,
292 [3] = IPRIO_DEFAULT_M + 1,
293 [7] = IPRIO_DEFAULT_M + 2,
295 [9] = IPRIO_DEFAULT_S,
296 [1] = IPRIO_DEFAULT_S + 1,
297 [5] = IPRIO_DEFAULT_S + 2,
299 [12] = IPRIO_DEFAULT_SGEXT,
301 [10] = IPRIO_DEFAULT_VS,
302 [2] = IPRIO_DEFAULT_VS + 1,
303 [6] = IPRIO_DEFAULT_VS + 2,
305 [39] = IPRIO_DEFAULT_LOWER,
306 [19] = IPRIO_DEFAULT_LOWER + 1,
307 [38] = IPRIO_DEFAULT_LOWER + 2,
308 [37] = IPRIO_DEFAULT_LOWER + 3,
309 [18] = IPRIO_DEFAULT_LOWER + 4,
310 [36] = IPRIO_DEFAULT_LOWER + 5,
312 [35] = IPRIO_DEFAULT_LOWER + 6,
313 [17] = IPRIO_DEFAULT_LOWER + 7,
314 [34] = IPRIO_DEFAULT_LOWER + 8,
315 [33] = IPRIO_DEFAULT_LOWER + 9,
316 [16] = IPRIO_DEFAULT_LOWER + 10,
317 [32] = IPRIO_DEFAULT_LOWER + 11,
320 uint8_t riscv_cpu_default_priority(int irq)
322 if (irq < 0 || irq > 63) {
323 return IPRIO_MMAXIPRIO;
326 return default_iprio[irq] ? default_iprio[irq] : IPRIO_MMAXIPRIO;
329 static int riscv_cpu_pending_to_irq(CPURISCVState *env,
330 int extirq, unsigned int extirq_def_prio,
331 uint64_t pending, uint8_t *iprio)
333 int irq, best_irq = RISCV_EXCP_NONE;
334 unsigned int prio, best_prio = UINT_MAX;
337 return RISCV_EXCP_NONE;
340 irq = ctz64(pending);
341 if (!((extirq == IRQ_M_EXT) ? riscv_cpu_cfg(env)->ext_smaia :
342 riscv_cpu_cfg(env)->ext_ssaia)) {
346 pending = pending >> irq;
351 prio = extirq_def_prio;
353 prio = (riscv_cpu_default_priority(irq) < extirq_def_prio) ?
357 if ((pending & 0x1) && (prio <= best_prio)) {
362 pending = pending >> 1;
368 uint64_t riscv_cpu_all_pending(CPURISCVState *env)
370 uint32_t gein = get_field(env->hstatus, HSTATUS_VGEIN);
371 uint64_t vsgein = (env->hgeip & (1ULL << gein)) ? MIP_VSEIP : 0;
372 uint64_t vstip = (env->vstime_irq) ? MIP_VSTIP : 0;
374 return (env->mip | vsgein | vstip) & env->mie;
377 int riscv_cpu_mirq_pending(CPURISCVState *env)
379 uint64_t irqs = riscv_cpu_all_pending(env) & ~env->mideleg &
380 ~(MIP_SGEIP | MIP_VSSIP | MIP_VSTIP | MIP_VSEIP);
382 return riscv_cpu_pending_to_irq(env, IRQ_M_EXT, IPRIO_DEFAULT_M,
386 int riscv_cpu_sirq_pending(CPURISCVState *env)
388 uint64_t irqs = riscv_cpu_all_pending(env) & env->mideleg &
389 ~(MIP_VSSIP | MIP_VSTIP | MIP_VSEIP);
391 return riscv_cpu_pending_to_irq(env, IRQ_S_EXT, IPRIO_DEFAULT_S,
395 int riscv_cpu_vsirq_pending(CPURISCVState *env)
397 uint64_t irqs = riscv_cpu_all_pending(env) & env->mideleg &
398 (MIP_VSSIP | MIP_VSTIP | MIP_VSEIP);
400 return riscv_cpu_pending_to_irq(env, IRQ_S_EXT, IPRIO_DEFAULT_S,
401 irqs >> 1, env->hviprio);
404 static int riscv_cpu_local_irq_pending(CPURISCVState *env)
407 uint64_t irqs, pending, mie, hsie, vsie;
409 /* Determine interrupt enable state of all privilege modes */
410 if (env->virt_enabled) {
413 vsie = (env->priv < PRV_S) ||
414 (env->priv == PRV_S && get_field(env->mstatus, MSTATUS_SIE));
416 mie = (env->priv < PRV_M) ||
417 (env->priv == PRV_M && get_field(env->mstatus, MSTATUS_MIE));
418 hsie = (env->priv < PRV_S) ||
419 (env->priv == PRV_S && get_field(env->mstatus, MSTATUS_SIE));
423 /* Determine all pending interrupts */
424 pending = riscv_cpu_all_pending(env);
426 /* Check M-mode interrupts */
427 irqs = pending & ~env->mideleg & -mie;
429 return riscv_cpu_pending_to_irq(env, IRQ_M_EXT, IPRIO_DEFAULT_M,
433 /* Check HS-mode interrupts */
434 irqs = pending & env->mideleg & ~env->hideleg & -hsie;
436 return riscv_cpu_pending_to_irq(env, IRQ_S_EXT, IPRIO_DEFAULT_S,
440 /* Check VS-mode interrupts */
441 irqs = pending & env->mideleg & env->hideleg & -vsie;
443 virq = riscv_cpu_pending_to_irq(env, IRQ_S_EXT, IPRIO_DEFAULT_S,
444 irqs >> 1, env->hviprio);
445 return (virq <= 0) ? virq : virq + 1;
448 /* Indicate no pending interrupt */
449 return RISCV_EXCP_NONE;
452 bool riscv_cpu_exec_interrupt(CPUState *cs, int interrupt_request)
454 if (interrupt_request & CPU_INTERRUPT_HARD) {
455 RISCVCPU *cpu = RISCV_CPU(cs);
456 CPURISCVState *env = &cpu->env;
457 int interruptno = riscv_cpu_local_irq_pending(env);
458 if (interruptno >= 0) {
459 cs->exception_index = RISCV_EXCP_INT_FLAG | interruptno;
460 riscv_cpu_do_interrupt(cs);
467 /* Return true is floating point support is currently enabled */
468 bool riscv_cpu_fp_enabled(CPURISCVState *env)
470 if (env->mstatus & MSTATUS_FS) {
471 if (env->virt_enabled && !(env->mstatus_hs & MSTATUS_FS)) {
480 /* Return true is vector support is currently enabled */
481 bool riscv_cpu_vector_enabled(CPURISCVState *env)
483 if (env->mstatus & MSTATUS_VS) {
484 if (env->virt_enabled && !(env->mstatus_hs & MSTATUS_VS)) {
493 void riscv_cpu_swap_hypervisor_regs(CPURISCVState *env)
495 uint64_t mstatus_mask = MSTATUS_MXR | MSTATUS_SUM |
496 MSTATUS_SPP | MSTATUS_SPIE | MSTATUS_SIE |
497 MSTATUS64_UXL | MSTATUS_VS;
499 if (riscv_has_ext(env, RVF)) {
500 mstatus_mask |= MSTATUS_FS;
502 bool current_virt = env->virt_enabled;
504 g_assert(riscv_has_ext(env, RVH));
507 /* Current V=1 and we are about to change to V=0 */
508 env->vsstatus = env->mstatus & mstatus_mask;
509 env->mstatus &= ~mstatus_mask;
510 env->mstatus |= env->mstatus_hs;
512 env->vstvec = env->stvec;
513 env->stvec = env->stvec_hs;
515 env->vsscratch = env->sscratch;
516 env->sscratch = env->sscratch_hs;
518 env->vsepc = env->sepc;
519 env->sepc = env->sepc_hs;
521 env->vscause = env->scause;
522 env->scause = env->scause_hs;
524 env->vstval = env->stval;
525 env->stval = env->stval_hs;
527 env->vsatp = env->satp;
528 env->satp = env->satp_hs;
530 /* Current V=0 and we are about to change to V=1 */
531 env->mstatus_hs = env->mstatus & mstatus_mask;
532 env->mstatus &= ~mstatus_mask;
533 env->mstatus |= env->vsstatus;
535 env->stvec_hs = env->stvec;
536 env->stvec = env->vstvec;
538 env->sscratch_hs = env->sscratch;
539 env->sscratch = env->vsscratch;
541 env->sepc_hs = env->sepc;
542 env->sepc = env->vsepc;
544 env->scause_hs = env->scause;
545 env->scause = env->vscause;
547 env->stval_hs = env->stval;
548 env->stval = env->vstval;
550 env->satp_hs = env->satp;
551 env->satp = env->vsatp;
555 target_ulong riscv_cpu_get_geilen(CPURISCVState *env)
557 if (!riscv_has_ext(env, RVH)) {
564 void riscv_cpu_set_geilen(CPURISCVState *env, target_ulong geilen)
566 if (!riscv_has_ext(env, RVH)) {
570 if (geilen > (TARGET_LONG_BITS - 1)) {
574 env->geilen = geilen;
577 /* This function can only be called to set virt when RVH is enabled */
578 void riscv_cpu_set_virt_enabled(CPURISCVState *env, bool enable)
580 /* Flush the TLB on all virt mode changes. */
581 if (env->virt_enabled != enable) {
582 tlb_flush(env_cpu(env));
585 env->virt_enabled = enable;
589 * The guest external interrupts from an interrupt controller are
590 * delivered only when the Guest/VM is running (i.e. V=1). This means
591 * any guest external interrupt which is triggered while the Guest/VM
592 * is not running (i.e. V=0) will be missed on QEMU resulting in guest
593 * with sluggish response to serial console input and other I/O events.
595 * To solve this, we check and inject interrupt after setting V=1.
597 riscv_cpu_update_mip(env, 0, 0);
601 int riscv_cpu_claim_interrupts(RISCVCPU *cpu, uint64_t interrupts)
603 CPURISCVState *env = &cpu->env;
604 if (env->miclaim & interrupts) {
607 env->miclaim |= interrupts;
612 uint64_t riscv_cpu_update_mip(CPURISCVState *env, uint64_t mask,
615 CPUState *cs = env_cpu(env);
616 uint64_t gein, vsgein = 0, vstip = 0, old = env->mip;
618 if (env->virt_enabled) {
619 gein = get_field(env->hstatus, HSTATUS_VGEIN);
620 vsgein = (env->hgeip & (1ULL << gein)) ? MIP_VSEIP : 0;
623 vstip = env->vstime_irq ? MIP_VSTIP : 0;
625 QEMU_IOTHREAD_LOCK_GUARD();
627 env->mip = (env->mip & ~mask) | (value & mask);
629 if (env->mip | vsgein | vstip) {
630 cpu_interrupt(cs, CPU_INTERRUPT_HARD);
632 cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
638 void riscv_cpu_set_rdtime_fn(CPURISCVState *env, uint64_t (*fn)(void *),
642 env->rdtime_fn_arg = arg;
645 void riscv_cpu_set_aia_ireg_rmw_fn(CPURISCVState *env, uint32_t priv,
646 int (*rmw_fn)(void *arg,
649 target_ulong new_val,
650 target_ulong write_mask),
654 env->aia_ireg_rmw_fn[priv] = rmw_fn;
655 env->aia_ireg_rmw_fn_arg[priv] = rmw_fn_arg;
659 void riscv_cpu_set_mode(CPURISCVState *env, target_ulong newpriv)
661 g_assert(newpriv <= PRV_M && newpriv != PRV_RESERVED);
663 if (icount_enabled() && newpriv != env->priv) {
664 riscv_itrigger_update_priv(env);
666 /* tlb_flush is unnecessary as mode is contained in mmu_idx */
668 env->xl = cpu_recompute_xl(env);
669 riscv_cpu_update_mask(env);
672 * Clear the load reservation - otherwise a reservation placed in one
673 * context/process can be used by another, resulting in an SC succeeding
674 * incorrectly. Version 2.2 of the ISA specification explicitly requires
675 * this behaviour, while later revisions say that the kernel "should" use
676 * an SC instruction to force the yielding of a load reservation on a
677 * preemptive context switch. As a result, do both.
683 * get_physical_address_pmp - check PMP permission for this physical address
685 * Match the PMP region and check permission for this physical address and it's
686 * TLB page. Returns 0 if the permission checking was successful
688 * @env: CPURISCVState
689 * @prot: The returned protection attributes
690 * @tlb_size: TLB page size containing addr. It could be modified after PMP
691 * permission checking. NULL if not set TLB page for addr.
692 * @addr: The physical address to be checked permission
693 * @access_type: The type of MMU access
694 * @mode: Indicates current privilege level.
696 static int get_physical_address_pmp(CPURISCVState *env, int *prot,
697 target_ulong *tlb_size, hwaddr addr,
698 int size, MMUAccessType access_type,
704 if (!riscv_cpu_cfg(env)->pmp) {
705 *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
706 return TRANSLATE_SUCCESS;
709 pmp_index = pmp_hart_has_privs(env, addr, size, 1 << access_type,
713 return TRANSLATE_PMP_FAIL;
716 *prot = pmp_priv_to_page_prot(pmp_priv);
717 if ((tlb_size != NULL) && pmp_index != MAX_RISCV_PMPS) {
718 target_ulong tlb_sa = addr & ~(TARGET_PAGE_SIZE - 1);
719 target_ulong tlb_ea = tlb_sa + TARGET_PAGE_SIZE - 1;
721 *tlb_size = pmp_get_tlb_size(env, pmp_index, tlb_sa, tlb_ea);
724 return TRANSLATE_SUCCESS;
728 * get_physical_address - get the physical address for this virtual address
730 * Do a page table walk to obtain the physical address corresponding to a
731 * virtual address. Returns 0 if the translation was successful
733 * Adapted from Spike's mmu_t::translate and mmu_t::walk
735 * @env: CPURISCVState
736 * @physical: This will be set to the calculated physical address
737 * @prot: The returned protection attributes
738 * @addr: The virtual address or guest physical address to be translated
739 * @fault_pte_addr: If not NULL, this will be set to fault pte address
740 * when a error occurs on pte address translation.
741 * This will already be shifted to match htval.
742 * @access_type: The type of MMU access
743 * @mmu_idx: Indicates current privilege level
744 * @first_stage: Are we in first stage translation?
745 * Second stage is used for hypervisor guest translation
746 * @two_stage: Are we going to perform two stage translation
747 * @is_debug: Is this access from a debugger or the monitor?
749 static int get_physical_address(CPURISCVState *env, hwaddr *physical,
750 int *prot, vaddr addr,
751 target_ulong *fault_pte_addr,
752 int access_type, int mmu_idx,
753 bool first_stage, bool two_stage,
757 * NOTE: the env->pc value visible here will not be
758 * correct, but the value visible to the exception handler
759 * (riscv_cpu_do_interrupt) is correct
762 MemTxAttrs attrs = MEMTXATTRS_UNSPECIFIED;
763 int mode = mmuidx_priv(mmu_idx);
764 bool use_background = false;
767 target_ulong napot_mask;
770 * Check if we should use the background registers for the two
771 * stage translation. We don't need to check if we actually need
772 * two stage translation as that happened before this function
773 * was called. Background registers will be used if the guest has
774 * forced a two stage translation to be on (in HS or M mode).
776 if (!env->virt_enabled && two_stage) {
777 use_background = true;
780 if (mode == PRV_M || !riscv_cpu_cfg(env)->mmu) {
782 *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
783 return TRANSLATE_SUCCESS;
789 int levels, ptidxbits, ptesize, vm, sum, mxr, widened;
791 if (first_stage == true) {
792 mxr = get_field(env->mstatus, MSTATUS_MXR);
794 mxr = get_field(env->vsstatus, MSTATUS_MXR);
797 if (first_stage == true) {
798 if (use_background) {
799 if (riscv_cpu_mxl(env) == MXL_RV32) {
800 base = (hwaddr)get_field(env->vsatp, SATP32_PPN) << PGSHIFT;
801 vm = get_field(env->vsatp, SATP32_MODE);
803 base = (hwaddr)get_field(env->vsatp, SATP64_PPN) << PGSHIFT;
804 vm = get_field(env->vsatp, SATP64_MODE);
807 if (riscv_cpu_mxl(env) == MXL_RV32) {
808 base = (hwaddr)get_field(env->satp, SATP32_PPN) << PGSHIFT;
809 vm = get_field(env->satp, SATP32_MODE);
811 base = (hwaddr)get_field(env->satp, SATP64_PPN) << PGSHIFT;
812 vm = get_field(env->satp, SATP64_MODE);
817 if (riscv_cpu_mxl(env) == MXL_RV32) {
818 base = (hwaddr)get_field(env->hgatp, SATP32_PPN) << PGSHIFT;
819 vm = get_field(env->hgatp, SATP32_MODE);
821 base = (hwaddr)get_field(env->hgatp, SATP64_PPN) << PGSHIFT;
822 vm = get_field(env->hgatp, SATP64_MODE);
826 sum = mmuidx_sum(mmu_idx) || is_debug;
829 levels = 2; ptidxbits = 10; ptesize = 4; break;
831 levels = 3; ptidxbits = 9; ptesize = 8; break;
833 levels = 4; ptidxbits = 9; ptesize = 8; break;
835 levels = 5; ptidxbits = 9; ptesize = 8; break;
838 *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
839 return TRANSLATE_SUCCESS;
841 g_assert_not_reached();
844 CPUState *cs = env_cpu(env);
845 int va_bits = PGSHIFT + levels * ptidxbits + widened;
846 target_ulong mask, masked_msbs;
848 if (TARGET_LONG_BITS > (va_bits - 1)) {
849 mask = (1L << (TARGET_LONG_BITS - (va_bits - 1))) - 1;
853 masked_msbs = (addr >> (va_bits - 1)) & mask;
855 if (masked_msbs != 0 && masked_msbs != mask) {
856 return TRANSLATE_FAIL;
859 bool pbmte = env->menvcfg & MENVCFG_PBMTE;
860 bool hade = env->menvcfg & MENVCFG_HADE;
862 if (first_stage && two_stage && env->virt_enabled) {
863 pbmte = pbmte && (env->henvcfg & HENVCFG_PBMTE);
864 hade = hade && (env->henvcfg & HENVCFG_HADE);
867 int ptshift = (levels - 1) * ptidxbits;
872 #if !TCG_OVERSIZED_GUEST
875 for (i = 0; i < levels; i++, ptshift -= ptidxbits) {
878 idx = (addr >> (PGSHIFT + ptshift)) &
879 ((1 << (ptidxbits + widened)) - 1);
881 idx = (addr >> (PGSHIFT + ptshift)) &
882 ((1 << ptidxbits) - 1);
885 /* check that physical address of PTE is legal */
887 if (two_stage && first_stage) {
891 /* Do the second stage translation on the base PTE address. */
892 int vbase_ret = get_physical_address(env, &vbase, &vbase_prot,
893 base, NULL, MMU_DATA_LOAD,
894 MMUIdx_U, false, true,
897 if (vbase_ret != TRANSLATE_SUCCESS) {
898 if (fault_pte_addr) {
899 *fault_pte_addr = (base + idx * ptesize) >> 2;
901 return TRANSLATE_G_STAGE_FAIL;
904 pte_addr = vbase + idx * ptesize;
906 pte_addr = base + idx * ptesize;
910 int pmp_ret = get_physical_address_pmp(env, &pmp_prot, NULL, pte_addr,
911 sizeof(target_ulong),
912 MMU_DATA_LOAD, PRV_S);
913 if (pmp_ret != TRANSLATE_SUCCESS) {
914 return TRANSLATE_PMP_FAIL;
917 if (riscv_cpu_mxl(env) == MXL_RV32) {
918 pte = address_space_ldl(cs->as, pte_addr, attrs, &res);
920 pte = address_space_ldq(cs->as, pte_addr, attrs, &res);
923 if (res != MEMTX_OK) {
924 return TRANSLATE_FAIL;
927 if (riscv_cpu_sxl(env) == MXL_RV32) {
928 ppn = pte >> PTE_PPN_SHIFT;
929 } else if (pbmte || riscv_cpu_cfg(env)->ext_svnapot) {
930 ppn = (pte & (target_ulong)PTE_PPN_MASK) >> PTE_PPN_SHIFT;
932 ppn = pte >> PTE_PPN_SHIFT;
933 if ((pte & ~(target_ulong)PTE_PPN_MASK) >> PTE_PPN_SHIFT) {
934 return TRANSLATE_FAIL;
938 if (!(pte & PTE_V)) {
940 return TRANSLATE_FAIL;
942 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;
953 /* No leaf pte at any translation level. */
954 return TRANSLATE_FAIL;
957 if (ppn & ((1ULL << ptshift) - 1)) {
959 return TRANSLATE_FAIL;
961 if (!pbmte && (pte & PTE_PBMT)) {
962 /* Reserved without Svpbmt. */
963 return TRANSLATE_FAIL;
965 if ((pte & (PTE_R | PTE_W | PTE_X)) == PTE_W) {
966 /* Reserved leaf PTE flags: PTE_W */
967 return TRANSLATE_FAIL;
969 if ((pte & (PTE_R | PTE_W | PTE_X)) == (PTE_W | PTE_X)) {
970 /* Reserved leaf PTE flags: PTE_W + PTE_X */
971 return TRANSLATE_FAIL;
974 ((mode != PRV_U) && (!sum || access_type == MMU_INST_FETCH))) {
976 * User PTE flags when not U mode and mstatus.SUM is not set,
977 * or the access type is an instruction fetch.
979 return TRANSLATE_FAIL;
981 if (!(pte & PTE_U) && (mode != PRV_S)) {
982 /* Supervisor PTE flags when not S mode */
983 return TRANSLATE_FAIL;
985 if (access_type == MMU_DATA_LOAD &&
986 !((pte & PTE_R) || ((pte & PTE_X) && mxr))) {
987 /* Read access check failed */
988 return TRANSLATE_FAIL;
990 if (access_type == MMU_DATA_STORE && !(pte & PTE_W)) {
991 /* Write access check failed */
992 return TRANSLATE_FAIL;
994 if (access_type == MMU_INST_FETCH && !(pte & PTE_X)) {
995 /* Fetch access check failed */
996 return TRANSLATE_FAIL;
999 /* If necessary, set accessed and dirty bits. */
1000 target_ulong updated_pte = pte | PTE_A |
1001 (access_type == MMU_DATA_STORE ? PTE_D : 0);
1003 /* Page table updates need to be atomic with MTTCG enabled */
1004 if (updated_pte != pte) {
1006 return TRANSLATE_FAIL;
1010 * - if accessed or dirty bits need updating, and the PTE is
1011 * in RAM, then we do so atomically with a compare and swap.
1012 * - if the PTE is in IO space or ROM, then it can't be updated
1013 * and we return TRANSLATE_FAIL.
1014 * - if the PTE changed by the time we went to update it, then
1015 * it is no longer valid and we must re-walk the page table.
1018 hwaddr l = sizeof(target_ulong), addr1;
1019 mr = address_space_translate(cs->as, pte_addr, &addr1, &l,
1020 false, MEMTXATTRS_UNSPECIFIED);
1021 if (memory_region_is_ram(mr)) {
1022 target_ulong *pte_pa = qemu_map_ram_ptr(mr->ram_block, addr1);
1023 #if TCG_OVERSIZED_GUEST
1025 * MTTCG is not enabled on oversized TCG guests so
1026 * page table updates do not need to be atomic
1028 *pte_pa = pte = updated_pte;
1030 target_ulong old_pte = qatomic_cmpxchg(pte_pa, pte, updated_pte);
1031 if (old_pte != pte) {
1038 * Misconfigured PTE in ROM (AD bits are not preset) or
1039 * PTE is in IO space and can't be updated atomically.
1041 return TRANSLATE_FAIL;
1045 /* For superpage mappings, make a fake leaf PTE for the TLB's benefit. */
1046 target_ulong vpn = addr >> PGSHIFT;
1048 if (riscv_cpu_cfg(env)->ext_svnapot && (pte & PTE_N)) {
1049 napot_bits = ctzl(ppn) + 1;
1050 if ((i != (levels - 1)) || (napot_bits != 4)) {
1051 return TRANSLATE_FAIL;
1055 napot_mask = (1 << napot_bits) - 1;
1056 *physical = (((ppn & ~napot_mask) | (vpn & napot_mask) |
1057 (vpn & (((target_ulong)1 << ptshift) - 1))
1058 ) << PGSHIFT) | (addr & ~TARGET_PAGE_MASK);
1060 /* set permissions on the TLB entry */
1061 if ((pte & PTE_R) || ((pte & PTE_X) && mxr)) {
1068 * Add write permission on stores or if the page is already dirty,
1069 * so that we TLB miss on later writes to update the dirty bit.
1071 if ((pte & PTE_W) && (access_type == MMU_DATA_STORE || (pte & PTE_D))) {
1072 *prot |= PAGE_WRITE;
1074 return TRANSLATE_SUCCESS;
1077 static void raise_mmu_exception(CPURISCVState *env, target_ulong address,
1078 MMUAccessType access_type, bool pmp_violation,
1079 bool first_stage, bool two_stage,
1080 bool two_stage_indirect)
1082 CPUState *cs = env_cpu(env);
1083 int page_fault_exceptions, vm;
1086 if (riscv_cpu_mxl(env) == MXL_RV32) {
1087 stap_mode = SATP32_MODE;
1089 stap_mode = SATP64_MODE;
1093 vm = get_field(env->satp, stap_mode);
1095 vm = get_field(env->hgatp, stap_mode);
1098 page_fault_exceptions = vm != VM_1_10_MBARE && !pmp_violation;
1100 switch (access_type) {
1101 case MMU_INST_FETCH:
1102 if (env->virt_enabled && !first_stage) {
1103 cs->exception_index = RISCV_EXCP_INST_GUEST_PAGE_FAULT;
1105 cs->exception_index = page_fault_exceptions ?
1106 RISCV_EXCP_INST_PAGE_FAULT : RISCV_EXCP_INST_ACCESS_FAULT;
1110 if (two_stage && !first_stage) {
1111 cs->exception_index = RISCV_EXCP_LOAD_GUEST_ACCESS_FAULT;
1113 cs->exception_index = page_fault_exceptions ?
1114 RISCV_EXCP_LOAD_PAGE_FAULT : RISCV_EXCP_LOAD_ACCESS_FAULT;
1117 case MMU_DATA_STORE:
1118 if (two_stage && !first_stage) {
1119 cs->exception_index = RISCV_EXCP_STORE_GUEST_AMO_ACCESS_FAULT;
1121 cs->exception_index = page_fault_exceptions ?
1122 RISCV_EXCP_STORE_PAGE_FAULT :
1123 RISCV_EXCP_STORE_AMO_ACCESS_FAULT;
1127 g_assert_not_reached();
1129 env->badaddr = address;
1130 env->two_stage_lookup = two_stage;
1131 env->two_stage_indirect_lookup = two_stage_indirect;
1134 hwaddr riscv_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
1136 RISCVCPU *cpu = RISCV_CPU(cs);
1137 CPURISCVState *env = &cpu->env;
1140 int mmu_idx = cpu_mmu_index(&cpu->env, false);
1142 if (get_physical_address(env, &phys_addr, &prot, addr, NULL, 0, mmu_idx,
1143 true, env->virt_enabled, true)) {
1147 if (env->virt_enabled) {
1148 if (get_physical_address(env, &phys_addr, &prot, phys_addr, NULL,
1149 0, mmu_idx, false, true, true)) {
1154 return phys_addr & TARGET_PAGE_MASK;
1157 void riscv_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr,
1158 vaddr addr, unsigned size,
1159 MMUAccessType access_type,
1160 int mmu_idx, MemTxAttrs attrs,
1161 MemTxResult response, uintptr_t retaddr)
1163 RISCVCPU *cpu = RISCV_CPU(cs);
1164 CPURISCVState *env = &cpu->env;
1166 if (access_type == MMU_DATA_STORE) {
1167 cs->exception_index = RISCV_EXCP_STORE_AMO_ACCESS_FAULT;
1168 } else if (access_type == MMU_DATA_LOAD) {
1169 cs->exception_index = RISCV_EXCP_LOAD_ACCESS_FAULT;
1171 cs->exception_index = RISCV_EXCP_INST_ACCESS_FAULT;
1174 env->badaddr = addr;
1175 env->two_stage_lookup = mmuidx_2stage(mmu_idx);
1176 env->two_stage_indirect_lookup = false;
1177 cpu_loop_exit_restore(cs, retaddr);
1180 void riscv_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
1181 MMUAccessType access_type, int mmu_idx,
1184 RISCVCPU *cpu = RISCV_CPU(cs);
1185 CPURISCVState *env = &cpu->env;
1186 switch (access_type) {
1187 case MMU_INST_FETCH:
1188 cs->exception_index = RISCV_EXCP_INST_ADDR_MIS;
1191 cs->exception_index = RISCV_EXCP_LOAD_ADDR_MIS;
1193 case MMU_DATA_STORE:
1194 cs->exception_index = RISCV_EXCP_STORE_AMO_ADDR_MIS;
1197 g_assert_not_reached();
1199 env->badaddr = addr;
1200 env->two_stage_lookup = mmuidx_2stage(mmu_idx);
1201 env->two_stage_indirect_lookup = false;
1202 cpu_loop_exit_restore(cs, retaddr);
1206 static void pmu_tlb_fill_incr_ctr(RISCVCPU *cpu, MMUAccessType access_type)
1208 enum riscv_pmu_event_idx pmu_event_type;
1210 switch (access_type) {
1211 case MMU_INST_FETCH:
1212 pmu_event_type = RISCV_PMU_EVENT_CACHE_ITLB_PREFETCH_MISS;
1215 pmu_event_type = RISCV_PMU_EVENT_CACHE_DTLB_READ_MISS;
1217 case MMU_DATA_STORE:
1218 pmu_event_type = RISCV_PMU_EVENT_CACHE_DTLB_WRITE_MISS;
1224 riscv_pmu_incr_ctr(cpu, pmu_event_type);
1227 bool riscv_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
1228 MMUAccessType access_type, int mmu_idx,
1229 bool probe, uintptr_t retaddr)
1231 RISCVCPU *cpu = RISCV_CPU(cs);
1232 CPURISCVState *env = &cpu->env;
1235 int prot, prot2, prot_pmp;
1236 bool pmp_violation = false;
1237 bool first_stage_error = true;
1238 bool two_stage_lookup = mmuidx_2stage(mmu_idx);
1239 bool two_stage_indirect_error = false;
1240 int ret = TRANSLATE_FAIL;
1242 /* default TLB page size */
1243 target_ulong tlb_size = TARGET_PAGE_SIZE;
1245 env->guest_phys_fault_addr = 0;
1247 qemu_log_mask(CPU_LOG_MMU, "%s ad %" VADDR_PRIx " rw %d mmu_idx %d\n",
1248 __func__, address, access_type, mmu_idx);
1250 pmu_tlb_fill_incr_ctr(cpu, access_type);
1251 if (two_stage_lookup) {
1252 /* Two stage lookup */
1253 ret = get_physical_address(env, &pa, &prot, address,
1254 &env->guest_phys_fault_addr, access_type,
1255 mmu_idx, true, true, false);
1258 * A G-stage exception may be triggered during two state lookup.
1259 * And the env->guest_phys_fault_addr has already been set in
1260 * get_physical_address().
1262 if (ret == TRANSLATE_G_STAGE_FAIL) {
1263 first_stage_error = false;
1264 two_stage_indirect_error = true;
1265 access_type = MMU_DATA_LOAD;
1268 qemu_log_mask(CPU_LOG_MMU,
1269 "%s 1st-stage address=%" VADDR_PRIx " ret %d physical "
1270 HWADDR_FMT_plx " prot %d\n",
1271 __func__, address, ret, pa, prot);
1273 if (ret == TRANSLATE_SUCCESS) {
1274 /* Second stage lookup */
1277 ret = get_physical_address(env, &pa, &prot2, im_address, NULL,
1278 access_type, MMUIdx_U, false, true,
1281 qemu_log_mask(CPU_LOG_MMU,
1282 "%s 2nd-stage address=%" VADDR_PRIx
1284 HWADDR_FMT_plx " prot %d\n",
1285 __func__, im_address, ret, pa, prot2);
1289 if (ret == TRANSLATE_SUCCESS) {
1290 ret = get_physical_address_pmp(env, &prot_pmp, &tlb_size, pa,
1291 size, access_type, mode);
1293 qemu_log_mask(CPU_LOG_MMU,
1294 "%s PMP address=" HWADDR_FMT_plx " ret %d prot"
1295 " %d tlb_size " TARGET_FMT_lu "\n",
1296 __func__, pa, ret, prot_pmp, tlb_size);
1301 if (ret != TRANSLATE_SUCCESS) {
1303 * Guest physical address translation failed, this is a HS
1306 first_stage_error = false;
1307 env->guest_phys_fault_addr = (im_address |
1309 (TARGET_PAGE_SIZE - 1))) >> 2;
1313 /* Single stage lookup */
1314 ret = get_physical_address(env, &pa, &prot, address, NULL,
1315 access_type, mmu_idx, true, false, false);
1317 qemu_log_mask(CPU_LOG_MMU,
1318 "%s address=%" VADDR_PRIx " ret %d physical "
1319 HWADDR_FMT_plx " prot %d\n",
1320 __func__, address, ret, pa, prot);
1322 if (ret == TRANSLATE_SUCCESS) {
1323 ret = get_physical_address_pmp(env, &prot_pmp, &tlb_size, pa,
1324 size, access_type, mode);
1326 qemu_log_mask(CPU_LOG_MMU,
1327 "%s PMP address=" HWADDR_FMT_plx " ret %d prot"
1328 " %d tlb_size " TARGET_FMT_lu "\n",
1329 __func__, pa, ret, prot_pmp, tlb_size);
1335 if (ret == TRANSLATE_PMP_FAIL) {
1336 pmp_violation = true;
1339 if (ret == TRANSLATE_SUCCESS) {
1340 tlb_set_page(cs, address & ~(tlb_size - 1), pa & ~(tlb_size - 1),
1341 prot, mmu_idx, tlb_size);
1346 raise_mmu_exception(env, address, access_type, pmp_violation,
1347 first_stage_error, two_stage_lookup,
1348 two_stage_indirect_error);
1349 cpu_loop_exit_restore(cs, retaddr);
1355 static target_ulong riscv_transformed_insn(CPURISCVState *env,
1359 target_ulong xinsn = 0;
1360 target_ulong access_rs1 = 0, access_imm = 0, access_size = 0;
1363 * Only Quadrant 0 and Quadrant 2 of RVC instruction space need to
1364 * be uncompressed. The Quadrant 1 of RVC instruction space need
1365 * not be transformed because these instructions won't generate
1366 * any load/store trap.
1369 if ((insn & 0x3) != 0x3) {
1370 /* Transform 16bit instruction into 32bit instruction */
1371 switch (GET_C_OP(insn)) {
1372 case OPC_RISC_C_OP_QUAD0: /* Quadrant 0 */
1373 switch (GET_C_FUNC(insn)) {
1374 case OPC_RISC_C_FUNC_FLD_LQ:
1375 if (riscv_cpu_xlen(env) != 128) { /* C.FLD (RV32/64) */
1376 xinsn = OPC_RISC_FLD;
1377 xinsn = SET_RD(xinsn, GET_C_RS2S(insn));
1378 access_rs1 = GET_C_RS1S(insn);
1379 access_imm = GET_C_LD_IMM(insn);
1383 case OPC_RISC_C_FUNC_LW: /* C.LW */
1384 xinsn = OPC_RISC_LW;
1385 xinsn = SET_RD(xinsn, GET_C_RS2S(insn));
1386 access_rs1 = GET_C_RS1S(insn);
1387 access_imm = GET_C_LW_IMM(insn);
1390 case OPC_RISC_C_FUNC_FLW_LD:
1391 if (riscv_cpu_xlen(env) == 32) { /* C.FLW (RV32) */
1392 xinsn = OPC_RISC_FLW;
1393 xinsn = SET_RD(xinsn, GET_C_RS2S(insn));
1394 access_rs1 = GET_C_RS1S(insn);
1395 access_imm = GET_C_LW_IMM(insn);
1397 } else { /* C.LD (RV64/RV128) */
1398 xinsn = OPC_RISC_LD;
1399 xinsn = SET_RD(xinsn, GET_C_RS2S(insn));
1400 access_rs1 = GET_C_RS1S(insn);
1401 access_imm = GET_C_LD_IMM(insn);
1405 case OPC_RISC_C_FUNC_FSD_SQ:
1406 if (riscv_cpu_xlen(env) != 128) { /* C.FSD (RV32/64) */
1407 xinsn = OPC_RISC_FSD;
1408 xinsn = SET_RS2(xinsn, GET_C_RS2S(insn));
1409 access_rs1 = GET_C_RS1S(insn);
1410 access_imm = GET_C_SD_IMM(insn);
1414 case OPC_RISC_C_FUNC_SW: /* C.SW */
1415 xinsn = OPC_RISC_SW;
1416 xinsn = SET_RS2(xinsn, GET_C_RS2S(insn));
1417 access_rs1 = GET_C_RS1S(insn);
1418 access_imm = GET_C_SW_IMM(insn);
1421 case OPC_RISC_C_FUNC_FSW_SD:
1422 if (riscv_cpu_xlen(env) == 32) { /* C.FSW (RV32) */
1423 xinsn = OPC_RISC_FSW;
1424 xinsn = SET_RS2(xinsn, GET_C_RS2S(insn));
1425 access_rs1 = GET_C_RS1S(insn);
1426 access_imm = GET_C_SW_IMM(insn);
1428 } else { /* C.SD (RV64/RV128) */
1429 xinsn = OPC_RISC_SD;
1430 xinsn = SET_RS2(xinsn, GET_C_RS2S(insn));
1431 access_rs1 = GET_C_RS1S(insn);
1432 access_imm = GET_C_SD_IMM(insn);
1440 case OPC_RISC_C_OP_QUAD2: /* Quadrant 2 */
1441 switch (GET_C_FUNC(insn)) {
1442 case OPC_RISC_C_FUNC_FLDSP_LQSP:
1443 if (riscv_cpu_xlen(env) != 128) { /* C.FLDSP (RV32/64) */
1444 xinsn = OPC_RISC_FLD;
1445 xinsn = SET_RD(xinsn, GET_C_RD(insn));
1447 access_imm = GET_C_LDSP_IMM(insn);
1451 case OPC_RISC_C_FUNC_LWSP: /* C.LWSP */
1452 xinsn = OPC_RISC_LW;
1453 xinsn = SET_RD(xinsn, GET_C_RD(insn));
1455 access_imm = GET_C_LWSP_IMM(insn);
1458 case OPC_RISC_C_FUNC_FLWSP_LDSP:
1459 if (riscv_cpu_xlen(env) == 32) { /* C.FLWSP (RV32) */
1460 xinsn = OPC_RISC_FLW;
1461 xinsn = SET_RD(xinsn, GET_C_RD(insn));
1463 access_imm = GET_C_LWSP_IMM(insn);
1465 } else { /* C.LDSP (RV64/RV128) */
1466 xinsn = OPC_RISC_LD;
1467 xinsn = SET_RD(xinsn, GET_C_RD(insn));
1469 access_imm = GET_C_LDSP_IMM(insn);
1473 case OPC_RISC_C_FUNC_FSDSP_SQSP:
1474 if (riscv_cpu_xlen(env) != 128) { /* C.FSDSP (RV32/64) */
1475 xinsn = OPC_RISC_FSD;
1476 xinsn = SET_RS2(xinsn, GET_C_RS2(insn));
1478 access_imm = GET_C_SDSP_IMM(insn);
1482 case OPC_RISC_C_FUNC_SWSP: /* C.SWSP */
1483 xinsn = OPC_RISC_SW;
1484 xinsn = SET_RS2(xinsn, GET_C_RS2(insn));
1486 access_imm = GET_C_SWSP_IMM(insn);
1490 if (riscv_cpu_xlen(env) == 32) { /* C.FSWSP (RV32) */
1491 xinsn = OPC_RISC_FSW;
1492 xinsn = SET_RS2(xinsn, GET_C_RS2(insn));
1494 access_imm = GET_C_SWSP_IMM(insn);
1496 } else { /* C.SDSP (RV64/RV128) */
1497 xinsn = OPC_RISC_SD;
1498 xinsn = SET_RS2(xinsn, GET_C_RS2(insn));
1500 access_imm = GET_C_SDSP_IMM(insn);
1513 * Clear Bit1 of transformed instruction to indicate that
1514 * original insruction was a 16bit instruction
1516 xinsn &= ~((target_ulong)0x2);
1518 /* Transform 32bit (or wider) instructions */
1519 switch (MASK_OP_MAJOR(insn)) {
1520 case OPC_RISC_ATOMIC:
1522 access_rs1 = GET_RS1(insn);
1523 access_size = 1 << GET_FUNCT3(insn);
1526 case OPC_RISC_FP_LOAD:
1527 xinsn = SET_I_IMM(insn, 0);
1528 access_rs1 = GET_RS1(insn);
1529 access_imm = GET_IMM(insn);
1530 access_size = 1 << GET_FUNCT3(insn);
1532 case OPC_RISC_STORE:
1533 case OPC_RISC_FP_STORE:
1534 xinsn = SET_S_IMM(insn, 0);
1535 access_rs1 = GET_RS1(insn);
1536 access_imm = GET_STORE_IMM(insn);
1537 access_size = 1 << GET_FUNCT3(insn);
1539 case OPC_RISC_SYSTEM:
1540 if (MASK_OP_SYSTEM(insn) == OPC_RISC_HLVHSV) {
1542 access_rs1 = GET_RS1(insn);
1543 access_size = 1 << ((GET_FUNCT7(insn) >> 1) & 0x3);
1544 access_size = 1 << access_size;
1553 xinsn = SET_RS1(xinsn, (taddr - (env->gpr[access_rs1] + access_imm)) &
1559 #endif /* !CONFIG_USER_ONLY */
1564 * Adapted from Spike's processor_t::take_trap.
1567 void riscv_cpu_do_interrupt(CPUState *cs)
1569 #if !defined(CONFIG_USER_ONLY)
1571 RISCVCPU *cpu = RISCV_CPU(cs);
1572 CPURISCVState *env = &cpu->env;
1573 bool write_gva = false;
1577 * cs->exception is 32-bits wide unlike mcause which is XLEN-bits wide
1578 * so we mask off the MSB and separate into trap type and cause.
1580 bool async = !!(cs->exception_index & RISCV_EXCP_INT_FLAG);
1581 target_ulong cause = cs->exception_index & RISCV_EXCP_INT_MASK;
1582 uint64_t deleg = async ? env->mideleg : env->medeleg;
1583 target_ulong tval = 0;
1584 target_ulong tinst = 0;
1585 target_ulong htval = 0;
1586 target_ulong mtval2 = 0;
1588 if (cause == RISCV_EXCP_SEMIHOST) {
1589 do_common_semihosting(cs);
1595 /* set tval to badaddr for traps with address information */
1597 case RISCV_EXCP_LOAD_GUEST_ACCESS_FAULT:
1598 case RISCV_EXCP_STORE_GUEST_AMO_ACCESS_FAULT:
1599 case RISCV_EXCP_LOAD_ADDR_MIS:
1600 case RISCV_EXCP_STORE_AMO_ADDR_MIS:
1601 case RISCV_EXCP_LOAD_ACCESS_FAULT:
1602 case RISCV_EXCP_STORE_AMO_ACCESS_FAULT:
1603 case RISCV_EXCP_LOAD_PAGE_FAULT:
1604 case RISCV_EXCP_STORE_PAGE_FAULT:
1605 write_gva = env->two_stage_lookup;
1606 tval = env->badaddr;
1607 if (env->two_stage_indirect_lookup) {
1609 * special pseudoinstruction for G-stage fault taken while
1610 * doing VS-stage page table walk.
1612 tinst = (riscv_cpu_xlen(env) == 32) ? 0x00002000 : 0x00003000;
1615 * The "Addr. Offset" field in transformed instruction is
1616 * non-zero only for misaligned access.
1618 tinst = riscv_transformed_insn(env, env->bins, tval);
1621 case RISCV_EXCP_INST_GUEST_PAGE_FAULT:
1622 case RISCV_EXCP_INST_ADDR_MIS:
1623 case RISCV_EXCP_INST_ACCESS_FAULT:
1624 case RISCV_EXCP_INST_PAGE_FAULT:
1625 write_gva = env->two_stage_lookup;
1626 tval = env->badaddr;
1627 if (env->two_stage_indirect_lookup) {
1629 * special pseudoinstruction for G-stage fault taken while
1630 * doing VS-stage page table walk.
1632 tinst = (riscv_cpu_xlen(env) == 32) ? 0x00002000 : 0x00003000;
1635 case RISCV_EXCP_ILLEGAL_INST:
1636 case RISCV_EXCP_VIRT_INSTRUCTION_FAULT:
1639 case RISCV_EXCP_BREAKPOINT:
1640 if (cs->watchpoint_hit) {
1641 tval = cs->watchpoint_hit->hitaddr;
1642 cs->watchpoint_hit = NULL;
1648 /* ecall is dispatched as one cause so translate based on mode */
1649 if (cause == RISCV_EXCP_U_ECALL) {
1650 assert(env->priv <= 3);
1652 if (env->priv == PRV_M) {
1653 cause = RISCV_EXCP_M_ECALL;
1654 } else if (env->priv == PRV_S && env->virt_enabled) {
1655 cause = RISCV_EXCP_VS_ECALL;
1656 } else if (env->priv == PRV_S && !env->virt_enabled) {
1657 cause = RISCV_EXCP_S_ECALL;
1658 } else if (env->priv == PRV_U) {
1659 cause = RISCV_EXCP_U_ECALL;
1664 trace_riscv_trap(env->mhartid, async, cause, env->pc, tval,
1665 riscv_cpu_get_trap_name(cause, async));
1667 qemu_log_mask(CPU_LOG_INT,
1668 "%s: hart:"TARGET_FMT_ld", async:%d, cause:"TARGET_FMT_lx", "
1669 "epc:0x"TARGET_FMT_lx", tval:0x"TARGET_FMT_lx", desc=%s\n",
1670 __func__, env->mhartid, async, cause, env->pc, tval,
1671 riscv_cpu_get_trap_name(cause, async));
1673 if (env->priv <= PRV_S &&
1674 cause < TARGET_LONG_BITS && ((deleg >> cause) & 1)) {
1675 /* handle the trap in S-mode */
1676 if (riscv_has_ext(env, RVH)) {
1677 uint64_t hdeleg = async ? env->hideleg : env->hedeleg;
1679 if (env->virt_enabled && ((hdeleg >> cause) & 1)) {
1680 /* Trap to VS mode */
1682 * See if we need to adjust cause. Yes if its VS mode interrupt
1683 * no if hypervisor has delegated one of hs mode's interrupt
1685 if (cause == IRQ_VS_TIMER || cause == IRQ_VS_SOFT ||
1686 cause == IRQ_VS_EXT) {
1690 } else if (env->virt_enabled) {
1691 /* Trap into HS mode, from virt */
1692 riscv_cpu_swap_hypervisor_regs(env);
1693 env->hstatus = set_field(env->hstatus, HSTATUS_SPVP,
1695 env->hstatus = set_field(env->hstatus, HSTATUS_SPV, true);
1697 htval = env->guest_phys_fault_addr;
1699 riscv_cpu_set_virt_enabled(env, 0);
1701 /* Trap into HS mode */
1702 env->hstatus = set_field(env->hstatus, HSTATUS_SPV, false);
1703 htval = env->guest_phys_fault_addr;
1705 env->hstatus = set_field(env->hstatus, HSTATUS_GVA, write_gva);
1709 s = set_field(s, MSTATUS_SPIE, get_field(s, MSTATUS_SIE));
1710 s = set_field(s, MSTATUS_SPP, env->priv);
1711 s = set_field(s, MSTATUS_SIE, 0);
1713 env->scause = cause | ((target_ulong)async << (TARGET_LONG_BITS - 1));
1714 env->sepc = env->pc;
1717 env->htinst = tinst;
1718 env->pc = (env->stvec >> 2 << 2) +
1719 ((async && (env->stvec & 3) == 1) ? cause * 4 : 0);
1720 riscv_cpu_set_mode(env, PRV_S);
1722 /* handle the trap in M-mode */
1723 if (riscv_has_ext(env, RVH)) {
1724 if (env->virt_enabled) {
1725 riscv_cpu_swap_hypervisor_regs(env);
1727 env->mstatus = set_field(env->mstatus, MSTATUS_MPV,
1729 if (env->virt_enabled && tval) {
1730 env->mstatus = set_field(env->mstatus, MSTATUS_GVA, 1);
1733 mtval2 = env->guest_phys_fault_addr;
1735 /* Trapping to M mode, virt is disabled */
1736 riscv_cpu_set_virt_enabled(env, 0);
1740 s = set_field(s, MSTATUS_MPIE, get_field(s, MSTATUS_MIE));
1741 s = set_field(s, MSTATUS_MPP, env->priv);
1742 s = set_field(s, MSTATUS_MIE, 0);
1744 env->mcause = cause | ~(((target_ulong)-1) >> async);
1745 env->mepc = env->pc;
1747 env->mtval2 = mtval2;
1748 env->mtinst = tinst;
1749 env->pc = (env->mtvec >> 2 << 2) +
1750 ((async && (env->mtvec & 3) == 1) ? cause * 4 : 0);
1751 riscv_cpu_set_mode(env, PRV_M);
1755 * NOTE: it is not necessary to yield load reservations here. It is only
1756 * necessary for an SC from "another hart" to cause a load reservation
1757 * to be yielded. Refer to the memory consistency model section of the
1758 * RISC-V ISA Specification.
1761 env->two_stage_lookup = false;
1762 env->two_stage_indirect_lookup = false;
1764 cs->exception_index = RISCV_EXCP_NONE; /* mark handled to qemu */