| /* |
| * HPPA memory access helper routines |
| * |
| * Copyright (c) 2017 Helge Deller |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include "qemu/osdep.h" |
| #include "qemu/log.h" |
| #include "cpu.h" |
| #include "exec/exec-all.h" |
| #include "exec/helper-proto.h" |
| #include "hw/core/cpu.h" |
| #include "trace.h" |
| |
| hwaddr hppa_abs_to_phys_pa2_w1(vaddr addr) |
| { |
| /* |
| * Figure H-8 "62-bit Absolute Accesses when PSW W-bit is 1" describes |
| * an algorithm in which a 62-bit absolute address is transformed to |
| * a 64-bit physical address. This must then be combined with that |
| * pictured in Figure H-11 "Physical Address Space Mapping", in which |
| * the full physical address is truncated to the N-bit physical address |
| * supported by the implementation. |
| * |
| * Since the supported physical address space is below 54 bits, the |
| * H-8 algorithm is moot and all that is left is to truncate. |
| */ |
| QEMU_BUILD_BUG_ON(TARGET_PHYS_ADDR_SPACE_BITS > 54); |
| return sextract64(addr, 0, TARGET_PHYS_ADDR_SPACE_BITS); |
| } |
| |
| hwaddr hppa_abs_to_phys_pa2_w0(vaddr addr) |
| { |
| /* |
| * See Figure H-10, "Absolute Accesses when PSW W-bit is 0", |
| * combined with Figure H-11, as above. |
| */ |
| if (likely(extract32(addr, 28, 4) != 0xf)) { |
| /* Memory address space */ |
| addr = (uint32_t)addr; |
| } else if (extract32(addr, 24, 4) != 0) { |
| /* I/O address space */ |
| addr = (int32_t)addr; |
| } else { |
| /* |
| * PDC address space: |
| * Figures H-10 and H-11 of the parisc2.0 spec do not specify |
| * where to map into the 64-bit PDC address space. |
| * We map with an offset which equals the 32-bit address, which |
| * is what can be seen on physical machines too. |
| */ |
| addr = (uint32_t)addr; |
| addr |= -1ull << (TARGET_PHYS_ADDR_SPACE_BITS - 4); |
| } |
| return addr; |
| } |
| |
| static HPPATLBEntry *hppa_find_tlb(CPUHPPAState *env, vaddr addr) |
| { |
| IntervalTreeNode *i = interval_tree_iter_first(&env->tlb_root, addr, addr); |
| |
| if (i) { |
| HPPATLBEntry *ent = container_of(i, HPPATLBEntry, itree); |
| trace_hppa_tlb_find_entry(env, ent, ent->entry_valid, |
| ent->itree.start, ent->itree.last, ent->pa); |
| return ent; |
| } |
| trace_hppa_tlb_find_entry_not_found(env, addr); |
| return NULL; |
| } |
| |
| static void hppa_flush_tlb_ent(CPUHPPAState *env, HPPATLBEntry *ent, |
| bool force_flush_btlb) |
| { |
| CPUState *cs = env_cpu(env); |
| bool is_btlb; |
| |
| if (!ent->entry_valid) { |
| return; |
| } |
| |
| trace_hppa_tlb_flush_ent(env, ent, ent->itree.start, |
| ent->itree.last, ent->pa); |
| |
| tlb_flush_range_by_mmuidx(cs, ent->itree.start, |
| ent->itree.last - ent->itree.start + 1, |
| HPPA_MMU_FLUSH_MASK, TARGET_LONG_BITS); |
| |
| /* Never clear BTLBs, unless forced to do so. */ |
| is_btlb = ent < &env->tlb[HPPA_BTLB_ENTRIES(env)]; |
| if (is_btlb && !force_flush_btlb) { |
| return; |
| } |
| |
| interval_tree_remove(&ent->itree, &env->tlb_root); |
| memset(ent, 0, sizeof(*ent)); |
| |
| if (!is_btlb) { |
| ent->unused_next = env->tlb_unused; |
| env->tlb_unused = ent; |
| } |
| } |
| |
| static void hppa_flush_tlb_range(CPUHPPAState *env, vaddr va_b, vaddr va_e) |
| { |
| IntervalTreeNode *i, *n; |
| |
| i = interval_tree_iter_first(&env->tlb_root, va_b, va_e); |
| for (; i ; i = n) { |
| HPPATLBEntry *ent = container_of(i, HPPATLBEntry, itree); |
| |
| /* |
| * Find the next entry now: In the normal case the current entry |
| * will be removed, but in the BTLB case it will remain. |
| */ |
| n = interval_tree_iter_next(i, va_b, va_e); |
| hppa_flush_tlb_ent(env, ent, false); |
| } |
| } |
| |
| static HPPATLBEntry *hppa_alloc_tlb_ent(CPUHPPAState *env) |
| { |
| HPPATLBEntry *ent = env->tlb_unused; |
| |
| if (ent == NULL) { |
| uint32_t btlb_entries = HPPA_BTLB_ENTRIES(env); |
| uint32_t i = env->tlb_last; |
| |
| if (i < btlb_entries || i >= ARRAY_SIZE(env->tlb)) { |
| i = btlb_entries; |
| } |
| env->tlb_last = i + 1; |
| |
| ent = &env->tlb[i]; |
| hppa_flush_tlb_ent(env, ent, false); |
| } |
| |
| env->tlb_unused = ent->unused_next; |
| return ent; |
| } |
| |
| #define ACCESS_ID_MASK 0xffff |
| |
| /* Return the set of protections allowed by a PID match. */ |
| static int match_prot_id_1(uint32_t access_id, uint32_t prot_id) |
| { |
| if (((access_id ^ (prot_id >> 1)) & ACCESS_ID_MASK) == 0) { |
| return (prot_id & 1 |
| ? PAGE_EXEC | PAGE_READ |
| : PAGE_EXEC | PAGE_READ | PAGE_WRITE); |
| } |
| return 0; |
| } |
| |
| static int match_prot_id32(CPUHPPAState *env, uint32_t access_id) |
| { |
| int r, i; |
| |
| for (i = CR_PID1; i <= CR_PID4; ++i) { |
| r = match_prot_id_1(access_id, env->cr[i]); |
| if (r) { |
| return r; |
| } |
| } |
| return 0; |
| } |
| |
| static int match_prot_id64(CPUHPPAState *env, uint32_t access_id) |
| { |
| int r, i; |
| |
| for (i = CR_PID1; i <= CR_PID4; ++i) { |
| r = match_prot_id_1(access_id, env->cr[i]); |
| if (r) { |
| return r; |
| } |
| r = match_prot_id_1(access_id, env->cr[i] >> 32); |
| if (r) { |
| return r; |
| } |
| } |
| return 0; |
| } |
| |
| int hppa_get_physical_address(CPUHPPAState *env, vaddr addr, int mmu_idx, |
| int type, hwaddr *pphys, int *pprot, |
| HPPATLBEntry **tlb_entry) |
| { |
| hwaddr phys; |
| int prot, r_prot, w_prot, x_prot, priv; |
| HPPATLBEntry *ent; |
| int ret = -1; |
| |
| if (tlb_entry) { |
| *tlb_entry = NULL; |
| } |
| |
| /* Virtual translation disabled. Map absolute to physical. */ |
| if (MMU_IDX_MMU_DISABLED(mmu_idx)) { |
| switch (mmu_idx) { |
| case MMU_ABS_W_IDX: |
| phys = hppa_abs_to_phys_pa2_w1(addr); |
| break; |
| case MMU_ABS_IDX: |
| if (hppa_is_pa20(env)) { |
| phys = hppa_abs_to_phys_pa2_w0(addr); |
| } else { |
| phys = (uint32_t)addr; |
| } |
| break; |
| default: |
| g_assert_not_reached(); |
| } |
| prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC; |
| goto egress; |
| } |
| |
| /* Find a valid tlb entry that matches the virtual address. */ |
| ent = hppa_find_tlb(env, addr); |
| if (ent == NULL) { |
| phys = 0; |
| prot = 0; |
| ret = (type == PAGE_EXEC) ? EXCP_ITLB_MISS : EXCP_DTLB_MISS; |
| goto egress; |
| } |
| |
| if (tlb_entry) { |
| *tlb_entry = ent; |
| } |
| |
| /* We now know the physical address. */ |
| phys = ent->pa + (addr - ent->itree.start); |
| |
| /* Map TLB access_rights field to QEMU protection. */ |
| priv = MMU_IDX_TO_PRIV(mmu_idx); |
| r_prot = (priv <= ent->ar_pl1) * PAGE_READ; |
| w_prot = (priv <= ent->ar_pl2) * PAGE_WRITE; |
| x_prot = (ent->ar_pl2 <= priv && priv <= ent->ar_pl1) * PAGE_EXEC; |
| switch (ent->ar_type) { |
| case 0: /* read-only: data page */ |
| prot = r_prot; |
| break; |
| case 1: /* read/write: dynamic data page */ |
| prot = r_prot | w_prot; |
| break; |
| case 2: /* read/execute: normal code page */ |
| prot = r_prot | x_prot; |
| break; |
| case 3: /* read/write/execute: dynamic code page */ |
| prot = r_prot | w_prot | x_prot; |
| break; |
| default: /* execute: promote to privilege level type & 3 */ |
| prot = x_prot; |
| break; |
| } |
| |
| /* |
| * No guest access type indicates a non-architectural access from |
| * within QEMU. Bypass checks for access, D, B, P and T bits. |
| */ |
| if (type == 0) { |
| goto egress; |
| } |
| |
| /* access_id == 0 means public page and no check is performed */ |
| if (ent->access_id && MMU_IDX_TO_P(mmu_idx)) { |
| int access_prot = (hppa_is_pa20(env) |
| ? match_prot_id64(env, ent->access_id) |
| : match_prot_id32(env, ent->access_id)); |
| if (unlikely(!(type & access_prot))) { |
| /* Not allowed -- Inst/Data Memory Protection Id Fault. */ |
| ret = type & PAGE_EXEC ? EXCP_IMP : EXCP_DMPI; |
| goto egress; |
| } |
| /* Otherwise exclude permissions not allowed (i.e WD). */ |
| prot &= access_prot; |
| } |
| |
| if (unlikely(!(prot & type))) { |
| /* Not allowed -- Inst/Data Memory Access Rights Fault. */ |
| ret = (type & PAGE_EXEC) ? EXCP_IMP : EXCP_DMAR; |
| goto egress; |
| } |
| |
| /* In reverse priority order, check for conditions which raise faults. |
| As we go, remove PROT bits that cover the condition we want to check. |
| In this way, the resulting PROT will force a re-check of the |
| architectural TLB entry for the next access. */ |
| if (unlikely(!ent->d)) { |
| if (type & PAGE_WRITE) { |
| /* The D bit is not set -- TLB Dirty Bit Fault. */ |
| ret = EXCP_TLB_DIRTY; |
| } |
| prot &= PAGE_READ | PAGE_EXEC; |
| } |
| if (unlikely(ent->b)) { |
| if (type & PAGE_WRITE) { |
| /* The B bit is set -- Data Memory Break Fault. */ |
| ret = EXCP_DMB; |
| } |
| prot &= PAGE_READ | PAGE_EXEC; |
| } |
| if (unlikely(ent->t)) { |
| if (!(type & PAGE_EXEC)) { |
| /* The T bit is set -- Page Reference Fault. */ |
| ret = EXCP_PAGE_REF; |
| } |
| prot &= PAGE_EXEC; |
| } |
| |
| egress: |
| *pphys = phys; |
| *pprot = prot; |
| trace_hppa_tlb_get_physical_address(env, ret, prot, addr, phys); |
| return ret; |
| } |
| |
| hwaddr hppa_cpu_get_phys_page_debug(CPUState *cs, vaddr addr) |
| { |
| HPPACPU *cpu = HPPA_CPU(cs); |
| hwaddr phys; |
| int prot, excp, mmu_idx; |
| |
| /* If the (data) mmu is disabled, bypass translation. */ |
| /* ??? We really ought to know if the code mmu is disabled too, |
| in order to get the correct debugging dumps. */ |
| mmu_idx = (cpu->env.psw & PSW_D ? MMU_KERNEL_IDX : |
| cpu->env.psw & PSW_W ? MMU_ABS_W_IDX : MMU_ABS_IDX); |
| |
| excp = hppa_get_physical_address(&cpu->env, addr, mmu_idx, 0, |
| &phys, &prot, NULL); |
| |
| /* Since we're translating for debugging, the only error that is a |
| hard error is no translation at all. Otherwise, while a real cpu |
| access might not have permission, the debugger does. */ |
| return excp == EXCP_DTLB_MISS ? -1 : phys; |
| } |
| |
| void hppa_set_ior_and_isr(CPUHPPAState *env, vaddr addr, bool mmu_disabled) |
| { |
| if (env->psw & PSW_Q) { |
| /* |
| * For pa1.x, the offset and space never overlap, and so we |
| * simply extract the high and low part of the virtual address. |
| * |
| * For pa2.0, the formation of these are described in section |
| * "Interruption Parameter Registers", page 2-15. |
| */ |
| env->cr[CR_IOR] = (uint32_t)addr; |
| env->cr[CR_ISR] = addr >> 32; |
| |
| if (hppa_is_pa20(env)) { |
| if (mmu_disabled) { |
| /* |
| * If data translation was disabled, the ISR contains |
| * the upper portion of the abs address, zero-extended. |
| */ |
| env->cr[CR_ISR] &= 0x3fffffff; |
| } else { |
| /* |
| * If data translation was enabled, the upper two bits |
| * of the IOR (the b field) are equal to the two space |
| * bits from the base register used to form the gva. |
| */ |
| uint64_t b; |
| |
| b = env->unwind_breg ? env->gr[env->unwind_breg] : 0; |
| b >>= (env->psw & PSW_W ? 62 : 30); |
| env->cr[CR_IOR] |= b << 62; |
| } |
| } |
| } |
| } |
| |
| G_NORETURN static void |
| raise_exception_with_ior(CPUHPPAState *env, int excp, uintptr_t retaddr, |
| vaddr addr, bool mmu_disabled) |
| { |
| CPUState *cs = env_cpu(env); |
| |
| cs->exception_index = excp; |
| cpu_restore_state(cs, retaddr); |
| hppa_set_ior_and_isr(env, addr, mmu_disabled); |
| |
| cpu_loop_exit(cs); |
| } |
| |
| void hppa_cpu_do_transaction_failed(CPUState *cs, hwaddr physaddr, |
| vaddr addr, unsigned size, |
| MMUAccessType access_type, |
| int mmu_idx, MemTxAttrs attrs, |
| MemTxResult response, uintptr_t retaddr) |
| { |
| CPUHPPAState *env = cpu_env(cs); |
| |
| qemu_log_mask(LOG_GUEST_ERROR, "HPMC at " TARGET_FMT_lx ":" TARGET_FMT_lx |
| " while accessing I/O at %#08" HWADDR_PRIx "\n", |
| env->iasq_f, env->iaoq_f, physaddr); |
| |
| /* FIXME: Enable HPMC exceptions when firmware has clean device probing */ |
| if (0) { |
| raise_exception_with_ior(env, EXCP_HPMC, retaddr, addr, |
| MMU_IDX_MMU_DISABLED(mmu_idx)); |
| } |
| } |
| |
| bool hppa_cpu_tlb_fill(CPUState *cs, vaddr addr, int size, |
| MMUAccessType type, int mmu_idx, |
| bool probe, uintptr_t retaddr) |
| { |
| HPPACPU *cpu = HPPA_CPU(cs); |
| CPUHPPAState *env = &cpu->env; |
| HPPATLBEntry *ent; |
| int prot, excp, a_prot; |
| hwaddr phys; |
| |
| switch (type) { |
| case MMU_INST_FETCH: |
| a_prot = PAGE_EXEC; |
| break; |
| case MMU_DATA_STORE: |
| a_prot = PAGE_WRITE; |
| break; |
| default: |
| a_prot = PAGE_READ; |
| break; |
| } |
| |
| excp = hppa_get_physical_address(env, addr, mmu_idx, |
| a_prot, &phys, &prot, &ent); |
| if (unlikely(excp >= 0)) { |
| if (probe) { |
| return false; |
| } |
| trace_hppa_tlb_fill_excp(env, addr, size, type, mmu_idx); |
| |
| /* Failure. Raise the indicated exception. */ |
| raise_exception_with_ior(env, excp, retaddr, addr, |
| MMU_IDX_MMU_DISABLED(mmu_idx)); |
| } |
| |
| trace_hppa_tlb_fill_success(env, addr & TARGET_PAGE_MASK, |
| phys & TARGET_PAGE_MASK, size, type, mmu_idx); |
| |
| /* |
| * Success! Store the translation into the QEMU TLB. |
| * Note that we always install a single-page entry, because that |
| * is what works best with softmmu -- anything else will trigger |
| * the large page protection mask. We do not require this, |
| * because we record the large page here in the hppa tlb. |
| */ |
| tlb_set_page(cs, addr & TARGET_PAGE_MASK, phys & TARGET_PAGE_MASK, |
| prot, mmu_idx, TARGET_PAGE_SIZE); |
| return true; |
| } |
| |
| /* Insert (Insn/Data) TLB Address. Note this is PA 1.1 only. */ |
| void HELPER(itlba_pa11)(CPUHPPAState *env, target_ulong addr, target_ulong reg) |
| { |
| HPPATLBEntry *ent; |
| |
| /* Zap any old entries covering ADDR. */ |
| addr &= TARGET_PAGE_MASK; |
| hppa_flush_tlb_range(env, addr, addr + TARGET_PAGE_SIZE - 1); |
| |
| ent = env->tlb_partial; |
| if (ent == NULL) { |
| ent = hppa_alloc_tlb_ent(env); |
| env->tlb_partial = ent; |
| } |
| |
| /* Note that ent->entry_valid == 0 already. */ |
| ent->itree.start = addr; |
| ent->itree.last = addr + TARGET_PAGE_SIZE - 1; |
| ent->pa = extract32(reg, 5, 20) << TARGET_PAGE_BITS; |
| trace_hppa_tlb_itlba(env, ent, ent->itree.start, ent->itree.last, ent->pa); |
| } |
| |
| static void set_access_bits_pa11(CPUHPPAState *env, HPPATLBEntry *ent, |
| target_ulong reg) |
| { |
| ent->access_id = extract32(reg, 1, 18); |
| ent->u = extract32(reg, 19, 1); |
| ent->ar_pl2 = extract32(reg, 20, 2); |
| ent->ar_pl1 = extract32(reg, 22, 2); |
| ent->ar_type = extract32(reg, 24, 3); |
| ent->b = extract32(reg, 27, 1); |
| ent->d = extract32(reg, 28, 1); |
| ent->t = extract32(reg, 29, 1); |
| ent->entry_valid = 1; |
| |
| interval_tree_insert(&ent->itree, &env->tlb_root); |
| trace_hppa_tlb_itlbp(env, ent, ent->access_id, ent->u, ent->ar_pl2, |
| ent->ar_pl1, ent->ar_type, ent->b, ent->d, ent->t); |
| } |
| |
| /* Insert (Insn/Data) TLB Protection. Note this is PA 1.1 only. */ |
| void HELPER(itlbp_pa11)(CPUHPPAState *env, target_ulong addr, target_ulong reg) |
| { |
| HPPATLBEntry *ent = env->tlb_partial; |
| |
| if (ent) { |
| env->tlb_partial = NULL; |
| if (ent->itree.start <= addr && addr <= ent->itree.last) { |
| set_access_bits_pa11(env, ent, reg); |
| return; |
| } |
| } |
| qemu_log_mask(LOG_GUEST_ERROR, "ITLBP not following ITLBA\n"); |
| } |
| |
| static void itlbt_pa20(CPUHPPAState *env, target_ulong r1, |
| target_ulong r2, vaddr va_b) |
| { |
| HPPATLBEntry *ent; |
| vaddr va_e; |
| uint64_t va_size; |
| int mask_shift; |
| |
| mask_shift = 2 * (r1 & 0xf); |
| va_size = (uint64_t)TARGET_PAGE_SIZE << mask_shift; |
| va_b &= -va_size; |
| va_e = va_b + va_size - 1; |
| |
| hppa_flush_tlb_range(env, va_b, va_e); |
| ent = hppa_alloc_tlb_ent(env); |
| |
| ent->itree.start = va_b; |
| ent->itree.last = va_e; |
| |
| /* Extract all 52 bits present in the page table entry. */ |
| ent->pa = r1 << (TARGET_PAGE_BITS - 5); |
| /* Align per the page size. */ |
| ent->pa &= TARGET_PAGE_MASK << mask_shift; |
| /* Ignore the bits beyond physical address space. */ |
| ent->pa = sextract64(ent->pa, 0, TARGET_PHYS_ADDR_SPACE_BITS); |
| |
| ent->t = extract64(r2, 61, 1); |
| ent->d = extract64(r2, 60, 1); |
| ent->b = extract64(r2, 59, 1); |
| ent->ar_type = extract64(r2, 56, 3); |
| ent->ar_pl1 = extract64(r2, 54, 2); |
| ent->ar_pl2 = extract64(r2, 52, 2); |
| ent->u = extract64(r2, 51, 1); |
| /* o = bit 50 */ |
| /* p = bit 49 */ |
| ent->access_id = extract64(r2, 1, 31); |
| ent->entry_valid = 1; |
| |
| interval_tree_insert(&ent->itree, &env->tlb_root); |
| trace_hppa_tlb_itlba(env, ent, ent->itree.start, ent->itree.last, ent->pa); |
| trace_hppa_tlb_itlbp(env, ent, ent->access_id, ent->u, |
| ent->ar_pl2, ent->ar_pl1, ent->ar_type, |
| ent->b, ent->d, ent->t); |
| } |
| |
| void HELPER(idtlbt_pa20)(CPUHPPAState *env, target_ulong r1, target_ulong r2) |
| { |
| vaddr va_b = deposit64(env->cr[CR_IOR], 32, 32, env->cr[CR_ISR]); |
| itlbt_pa20(env, r1, r2, va_b); |
| } |
| |
| void HELPER(iitlbt_pa20)(CPUHPPAState *env, target_ulong r1, target_ulong r2) |
| { |
| vaddr va_b = deposit64(env->cr[CR_IIAOQ], 32, 32, env->cr[CR_IIASQ]); |
| itlbt_pa20(env, r1, r2, va_b); |
| } |
| |
| /* Purge (Insn/Data) TLB. */ |
| static void ptlb_work(CPUState *cpu, run_on_cpu_data data) |
| { |
| vaddr start = data.target_ptr; |
| vaddr end; |
| |
| /* |
| * PA2.0 allows a range of pages encoded into GR[b], which we have |
| * copied into the bottom bits of the otherwise page-aligned address. |
| * PA1.x will always provide zero here, for a single page flush. |
| */ |
| end = start & 0xf; |
| start &= TARGET_PAGE_MASK; |
| end = (vaddr)TARGET_PAGE_SIZE << (2 * end); |
| end = start + end - 1; |
| |
| hppa_flush_tlb_range(cpu_env(cpu), start, end); |
| } |
| |
| /* This is local to the current cpu. */ |
| void HELPER(ptlb_l)(CPUHPPAState *env, target_ulong addr) |
| { |
| trace_hppa_tlb_ptlb_local(env); |
| ptlb_work(env_cpu(env), RUN_ON_CPU_TARGET_PTR(addr)); |
| } |
| |
| /* This is synchronous across all processors. */ |
| void HELPER(ptlb)(CPUHPPAState *env, target_ulong addr) |
| { |
| CPUState *src = env_cpu(env); |
| CPUState *cpu; |
| bool wait = false; |
| |
| trace_hppa_tlb_ptlb(env); |
| run_on_cpu_data data = RUN_ON_CPU_TARGET_PTR(addr); |
| |
| CPU_FOREACH(cpu) { |
| if (cpu != src) { |
| async_run_on_cpu(cpu, ptlb_work, data); |
| wait = true; |
| } |
| } |
| if (wait) { |
| async_safe_run_on_cpu(src, ptlb_work, data); |
| } else { |
| ptlb_work(src, data); |
| } |
| } |
| |
| void hppa_ptlbe(CPUHPPAState *env) |
| { |
| uint32_t btlb_entries = HPPA_BTLB_ENTRIES(env); |
| uint32_t i; |
| |
| /* Zap the (non-btlb) tlb entries themselves. */ |
| memset(&env->tlb[btlb_entries], 0, |
| sizeof(env->tlb) - btlb_entries * sizeof(env->tlb[0])); |
| env->tlb_last = btlb_entries; |
| env->tlb_partial = NULL; |
| |
| /* Put them all onto the unused list. */ |
| env->tlb_unused = &env->tlb[btlb_entries]; |
| for (i = btlb_entries; i < ARRAY_SIZE(env->tlb) - 1; ++i) { |
| env->tlb[i].unused_next = &env->tlb[i + 1]; |
| } |
| |
| /* Re-initialize the interval tree with only the btlb entries. */ |
| memset(&env->tlb_root, 0, sizeof(env->tlb_root)); |
| for (i = 0; i < btlb_entries; ++i) { |
| if (env->tlb[i].entry_valid) { |
| interval_tree_insert(&env->tlb[i].itree, &env->tlb_root); |
| } |
| } |
| |
| tlb_flush_by_mmuidx(env_cpu(env), HPPA_MMU_FLUSH_MASK); |
| } |
| |
| /* Purge (Insn/Data) TLB entry. This affects an implementation-defined |
| number of pages/entries (we choose all), and is local to the cpu. */ |
| void HELPER(ptlbe)(CPUHPPAState *env) |
| { |
| trace_hppa_tlb_ptlbe(env); |
| qemu_log_mask(CPU_LOG_MMU, "FLUSH ALL TLB ENTRIES\n"); |
| hppa_ptlbe(env); |
| } |
| |
| void cpu_hppa_change_prot_id(CPUHPPAState *env) |
| { |
| tlb_flush_by_mmuidx(env_cpu(env), HPPA_MMU_FLUSH_P_MASK); |
| } |
| |
| void HELPER(change_prot_id)(CPUHPPAState *env) |
| { |
| cpu_hppa_change_prot_id(env); |
| } |
| |
| target_ulong HELPER(lpa)(CPUHPPAState *env, target_ulong addr) |
| { |
| hwaddr phys; |
| int prot, excp; |
| |
| excp = hppa_get_physical_address(env, addr, MMU_KERNEL_IDX, 0, |
| &phys, &prot, NULL); |
| if (excp >= 0) { |
| if (excp == EXCP_DTLB_MISS) { |
| excp = EXCP_NA_DTLB_MISS; |
| } |
| trace_hppa_tlb_lpa_failed(env, addr); |
| raise_exception_with_ior(env, excp, GETPC(), addr, false); |
| } |
| trace_hppa_tlb_lpa_success(env, addr, phys); |
| return phys; |
| } |
| |
| /* Return the ar_type of the TLB at VADDR, or -1. */ |
| int hppa_artype_for_page(CPUHPPAState *env, target_ulong vaddr) |
| { |
| HPPATLBEntry *ent = hppa_find_tlb(env, vaddr); |
| return ent ? ent->ar_type : -1; |
| } |
| |
| /* |
| * diag_btlb() emulates the PDC PDC_BLOCK_TLB firmware call to |
| * allow operating systems to modify the Block TLB (BTLB) entries. |
| * For implementation details see page 1-13 in |
| * https://parisc.wiki.kernel.org/images-parisc/e/ef/Pdc11-v0.96-Ch1-procs.pdf |
| */ |
| void HELPER(diag_btlb)(CPUHPPAState *env) |
| { |
| unsigned int phys_page, len, slot; |
| int mmu_idx = cpu_mmu_index(env_cpu(env), 0); |
| uintptr_t ra = GETPC(); |
| HPPATLBEntry *btlb; |
| uint64_t virt_page; |
| uint32_t *vaddr; |
| uint32_t btlb_entries = HPPA_BTLB_ENTRIES(env); |
| |
| /* BTLBs are not supported on 64-bit CPUs */ |
| if (btlb_entries == 0) { |
| env->gr[28] = -1; /* nonexistent procedure */ |
| return; |
| } |
| |
| env->gr[28] = 0; /* PDC_OK */ |
| |
| switch (env->gr[25]) { |
| case 0: |
| /* return BTLB parameters */ |
| qemu_log_mask(CPU_LOG_MMU, "PDC_BLOCK_TLB: PDC_BTLB_INFO\n"); |
| vaddr = probe_access(env, env->gr[24], 4 * sizeof(uint32_t), |
| MMU_DATA_STORE, mmu_idx, ra); |
| if (vaddr == NULL) { |
| env->gr[28] = -10; /* invalid argument */ |
| } else { |
| vaddr[0] = cpu_to_be32(1); |
| vaddr[1] = cpu_to_be32(16 * 1024); |
| vaddr[2] = cpu_to_be32(PA10_BTLB_FIXED); |
| vaddr[3] = cpu_to_be32(PA10_BTLB_VARIABLE); |
| } |
| break; |
| case 1: |
| /* insert BTLB entry */ |
| virt_page = env->gr[24]; /* upper 32 bits */ |
| virt_page <<= 32; |
| virt_page |= env->gr[23]; /* lower 32 bits */ |
| phys_page = env->gr[22]; |
| len = env->gr[21]; |
| slot = env->gr[19]; |
| qemu_log_mask(CPU_LOG_MMU, "PDC_BLOCK_TLB: PDC_BTLB_INSERT " |
| "0x%08llx-0x%08llx: vpage 0x%llx for phys page 0x%04x len %d " |
| "into slot %d\n", |
| (long long) virt_page << TARGET_PAGE_BITS, |
| (long long) (virt_page + len) << TARGET_PAGE_BITS, |
| (long long) virt_page, phys_page, len, slot); |
| if (slot < btlb_entries) { |
| btlb = &env->tlb[slot]; |
| |
| /* Force flush of possibly existing BTLB entry. */ |
| hppa_flush_tlb_ent(env, btlb, true); |
| |
| /* Create new BTLB entry */ |
| btlb->itree.start = virt_page << TARGET_PAGE_BITS; |
| btlb->itree.last = btlb->itree.start + len * TARGET_PAGE_SIZE - 1; |
| btlb->pa = phys_page << TARGET_PAGE_BITS; |
| set_access_bits_pa11(env, btlb, env->gr[20]); |
| btlb->t = 0; |
| btlb->d = 1; |
| } else { |
| env->gr[28] = -10; /* invalid argument */ |
| } |
| break; |
| case 2: |
| /* Purge BTLB entry */ |
| slot = env->gr[22]; |
| qemu_log_mask(CPU_LOG_MMU, "PDC_BLOCK_TLB: PDC_BTLB_PURGE slot %d\n", |
| slot); |
| if (slot < btlb_entries) { |
| btlb = &env->tlb[slot]; |
| hppa_flush_tlb_ent(env, btlb, true); |
| } else { |
| env->gr[28] = -10; /* invalid argument */ |
| } |
| break; |
| case 3: |
| /* Purge all BTLB entries */ |
| qemu_log_mask(CPU_LOG_MMU, "PDC_BLOCK_TLB: PDC_BTLB_PURGE_ALL\n"); |
| for (slot = 0; slot < btlb_entries; slot++) { |
| btlb = &env->tlb[slot]; |
| hppa_flush_tlb_ent(env, btlb, true); |
| } |
| break; |
| default: |
| env->gr[28] = -2; /* nonexistent option */ |
| break; |
| } |
| } |
