| /* |
| * RISC-V APLIC (Advanced Platform Level Interrupt Controller) |
| * |
| * Copyright (c) 2021 Western Digital Corporation or its affiliates. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms and conditions of the GNU General Public License, |
| * version 2 or later, as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| * more details. |
| * |
| * You should have received a copy of the GNU General Public License along with |
| * this program. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include "qemu/osdep.h" |
| #include "qapi/error.h" |
| #include "qemu/log.h" |
| #include "qemu/module.h" |
| #include "qemu/error-report.h" |
| #include "qemu/bswap.h" |
| #include "exec/address-spaces.h" |
| #include "hw/sysbus.h" |
| #include "hw/pci/msi.h" |
| #include "hw/boards.h" |
| #include "hw/qdev-properties.h" |
| #include "hw/intc/riscv_aplic.h" |
| #include "hw/irq.h" |
| #include "target/riscv/cpu.h" |
| #include "sysemu/sysemu.h" |
| #include "migration/vmstate.h" |
| |
| #define APLIC_MAX_IDC (1UL << 14) |
| #define APLIC_MAX_SOURCE 1024 |
| #define APLIC_MIN_IPRIO_BITS 1 |
| #define APLIC_MAX_IPRIO_BITS 8 |
| #define APLIC_MAX_CHILDREN 1024 |
| |
| #define APLIC_DOMAINCFG 0x0000 |
| #define APLIC_DOMAINCFG_RDONLY 0x80000000 |
| #define APLIC_DOMAINCFG_IE (1 << 8) |
| #define APLIC_DOMAINCFG_DM (1 << 2) |
| #define APLIC_DOMAINCFG_BE (1 << 0) |
| |
| #define APLIC_SOURCECFG_BASE 0x0004 |
| #define APLIC_SOURCECFG_D (1 << 10) |
| #define APLIC_SOURCECFG_CHILDIDX_MASK 0x000003ff |
| #define APLIC_SOURCECFG_SM_MASK 0x00000007 |
| #define APLIC_SOURCECFG_SM_INACTIVE 0x0 |
| #define APLIC_SOURCECFG_SM_DETACH 0x1 |
| #define APLIC_SOURCECFG_SM_EDGE_RISE 0x4 |
| #define APLIC_SOURCECFG_SM_EDGE_FALL 0x5 |
| #define APLIC_SOURCECFG_SM_LEVEL_HIGH 0x6 |
| #define APLIC_SOURCECFG_SM_LEVEL_LOW 0x7 |
| |
| #define APLIC_MMSICFGADDR 0x1bc0 |
| #define APLIC_MMSICFGADDRH 0x1bc4 |
| #define APLIC_SMSICFGADDR 0x1bc8 |
| #define APLIC_SMSICFGADDRH 0x1bcc |
| |
| #define APLIC_xMSICFGADDRH_L (1UL << 31) |
| #define APLIC_xMSICFGADDRH_HHXS_MASK 0x1f |
| #define APLIC_xMSICFGADDRH_HHXS_SHIFT 24 |
| #define APLIC_xMSICFGADDRH_LHXS_MASK 0x7 |
| #define APLIC_xMSICFGADDRH_LHXS_SHIFT 20 |
| #define APLIC_xMSICFGADDRH_HHXW_MASK 0x7 |
| #define APLIC_xMSICFGADDRH_HHXW_SHIFT 16 |
| #define APLIC_xMSICFGADDRH_LHXW_MASK 0xf |
| #define APLIC_xMSICFGADDRH_LHXW_SHIFT 12 |
| #define APLIC_xMSICFGADDRH_BAPPN_MASK 0xfff |
| |
| #define APLIC_xMSICFGADDR_PPN_SHIFT 12 |
| |
| #define APLIC_xMSICFGADDR_PPN_HART(__lhxs) \ |
| ((1UL << (__lhxs)) - 1) |
| |
| #define APLIC_xMSICFGADDR_PPN_LHX_MASK(__lhxw) \ |
| ((1UL << (__lhxw)) - 1) |
| #define APLIC_xMSICFGADDR_PPN_LHX_SHIFT(__lhxs) \ |
| ((__lhxs)) |
| #define APLIC_xMSICFGADDR_PPN_LHX(__lhxw, __lhxs) \ |
| (APLIC_xMSICFGADDR_PPN_LHX_MASK(__lhxw) << \ |
| APLIC_xMSICFGADDR_PPN_LHX_SHIFT(__lhxs)) |
| |
| #define APLIC_xMSICFGADDR_PPN_HHX_MASK(__hhxw) \ |
| ((1UL << (__hhxw)) - 1) |
| #define APLIC_xMSICFGADDR_PPN_HHX_SHIFT(__hhxs) \ |
| ((__hhxs) + APLIC_xMSICFGADDR_PPN_SHIFT) |
| #define APLIC_xMSICFGADDR_PPN_HHX(__hhxw, __hhxs) \ |
| (APLIC_xMSICFGADDR_PPN_HHX_MASK(__hhxw) << \ |
| APLIC_xMSICFGADDR_PPN_HHX_SHIFT(__hhxs)) |
| |
| #define APLIC_xMSICFGADDRH_VALID_MASK \ |
| (APLIC_xMSICFGADDRH_L | \ |
| (APLIC_xMSICFGADDRH_HHXS_MASK << APLIC_xMSICFGADDRH_HHXS_SHIFT) | \ |
| (APLIC_xMSICFGADDRH_LHXS_MASK << APLIC_xMSICFGADDRH_LHXS_SHIFT) | \ |
| (APLIC_xMSICFGADDRH_HHXW_MASK << APLIC_xMSICFGADDRH_HHXW_SHIFT) | \ |
| (APLIC_xMSICFGADDRH_LHXW_MASK << APLIC_xMSICFGADDRH_LHXW_SHIFT) | \ |
| APLIC_xMSICFGADDRH_BAPPN_MASK) |
| |
| #define APLIC_SETIP_BASE 0x1c00 |
| #define APLIC_SETIPNUM 0x1cdc |
| |
| #define APLIC_CLRIP_BASE 0x1d00 |
| #define APLIC_CLRIPNUM 0x1ddc |
| |
| #define APLIC_SETIE_BASE 0x1e00 |
| #define APLIC_SETIENUM 0x1edc |
| |
| #define APLIC_CLRIE_BASE 0x1f00 |
| #define APLIC_CLRIENUM 0x1fdc |
| |
| #define APLIC_SETIPNUM_LE 0x2000 |
| #define APLIC_SETIPNUM_BE 0x2004 |
| |
| #define APLIC_ISTATE_PENDING (1U << 0) |
| #define APLIC_ISTATE_ENABLED (1U << 1) |
| #define APLIC_ISTATE_ENPEND (APLIC_ISTATE_ENABLED | \ |
| APLIC_ISTATE_PENDING) |
| #define APLIC_ISTATE_INPUT (1U << 8) |
| |
| #define APLIC_GENMSI 0x3000 |
| |
| #define APLIC_TARGET_BASE 0x3004 |
| #define APLIC_TARGET_HART_IDX_SHIFT 18 |
| #define APLIC_TARGET_HART_IDX_MASK 0x3fff |
| #define APLIC_TARGET_GUEST_IDX_SHIFT 12 |
| #define APLIC_TARGET_GUEST_IDX_MASK 0x3f |
| #define APLIC_TARGET_IPRIO_MASK 0xff |
| #define APLIC_TARGET_EIID_MASK 0x7ff |
| |
| #define APLIC_IDC_BASE 0x4000 |
| #define APLIC_IDC_SIZE 32 |
| |
| #define APLIC_IDC_IDELIVERY 0x00 |
| |
| #define APLIC_IDC_IFORCE 0x04 |
| |
| #define APLIC_IDC_ITHRESHOLD 0x08 |
| |
| #define APLIC_IDC_TOPI 0x18 |
| #define APLIC_IDC_TOPI_ID_SHIFT 16 |
| #define APLIC_IDC_TOPI_ID_MASK 0x3ff |
| #define APLIC_IDC_TOPI_PRIO_MASK 0xff |
| |
| #define APLIC_IDC_CLAIMI 0x1c |
| |
| static uint32_t riscv_aplic_read_input_word(RISCVAPLICState *aplic, |
| uint32_t word) |
| { |
| uint32_t i, irq, ret = 0; |
| |
| for (i = 0; i < 32; i++) { |
| irq = word * 32 + i; |
| if (!irq || aplic->num_irqs <= irq) { |
| continue; |
| } |
| |
| ret |= ((aplic->state[irq] & APLIC_ISTATE_INPUT) ? 1 : 0) << i; |
| } |
| |
| return ret; |
| } |
| |
| static uint32_t riscv_aplic_read_pending_word(RISCVAPLICState *aplic, |
| uint32_t word) |
| { |
| uint32_t i, irq, ret = 0; |
| |
| for (i = 0; i < 32; i++) { |
| irq = word * 32 + i; |
| if (!irq || aplic->num_irqs <= irq) { |
| continue; |
| } |
| |
| ret |= ((aplic->state[irq] & APLIC_ISTATE_PENDING) ? 1 : 0) << i; |
| } |
| |
| return ret; |
| } |
| |
| static void riscv_aplic_set_pending_raw(RISCVAPLICState *aplic, |
| uint32_t irq, bool pending) |
| { |
| if (pending) { |
| aplic->state[irq] |= APLIC_ISTATE_PENDING; |
| } else { |
| aplic->state[irq] &= ~APLIC_ISTATE_PENDING; |
| } |
| } |
| |
| static void riscv_aplic_set_pending(RISCVAPLICState *aplic, |
| uint32_t irq, bool pending) |
| { |
| uint32_t sourcecfg, sm; |
| |
| if ((irq <= 0) || (aplic->num_irqs <= irq)) { |
| return; |
| } |
| |
| sourcecfg = aplic->sourcecfg[irq]; |
| if (sourcecfg & APLIC_SOURCECFG_D) { |
| return; |
| } |
| |
| sm = sourcecfg & APLIC_SOURCECFG_SM_MASK; |
| if ((sm == APLIC_SOURCECFG_SM_INACTIVE) || |
| ((!aplic->msimode || (aplic->msimode && !pending)) && |
| ((sm == APLIC_SOURCECFG_SM_LEVEL_HIGH) || |
| (sm == APLIC_SOURCECFG_SM_LEVEL_LOW)))) { |
| return; |
| } |
| |
| riscv_aplic_set_pending_raw(aplic, irq, pending); |
| } |
| |
| static void riscv_aplic_set_pending_word(RISCVAPLICState *aplic, |
| uint32_t word, uint32_t value, |
| bool pending) |
| { |
| uint32_t i, irq; |
| |
| for (i = 0; i < 32; i++) { |
| irq = word * 32 + i; |
| if (!irq || aplic->num_irqs <= irq) { |
| continue; |
| } |
| |
| if (value & (1U << i)) { |
| riscv_aplic_set_pending(aplic, irq, pending); |
| } |
| } |
| } |
| |
| static uint32_t riscv_aplic_read_enabled_word(RISCVAPLICState *aplic, |
| int word) |
| { |
| uint32_t i, irq, ret = 0; |
| |
| for (i = 0; i < 32; i++) { |
| irq = word * 32 + i; |
| if (!irq || aplic->num_irqs <= irq) { |
| continue; |
| } |
| |
| ret |= ((aplic->state[irq] & APLIC_ISTATE_ENABLED) ? 1 : 0) << i; |
| } |
| |
| return ret; |
| } |
| |
| static void riscv_aplic_set_enabled_raw(RISCVAPLICState *aplic, |
| uint32_t irq, bool enabled) |
| { |
| if (enabled) { |
| aplic->state[irq] |= APLIC_ISTATE_ENABLED; |
| } else { |
| aplic->state[irq] &= ~APLIC_ISTATE_ENABLED; |
| } |
| } |
| |
| static void riscv_aplic_set_enabled(RISCVAPLICState *aplic, |
| uint32_t irq, bool enabled) |
| { |
| uint32_t sourcecfg, sm; |
| |
| if ((irq <= 0) || (aplic->num_irqs <= irq)) { |
| return; |
| } |
| |
| sourcecfg = aplic->sourcecfg[irq]; |
| if (sourcecfg & APLIC_SOURCECFG_D) { |
| return; |
| } |
| |
| sm = sourcecfg & APLIC_SOURCECFG_SM_MASK; |
| if (sm == APLIC_SOURCECFG_SM_INACTIVE) { |
| return; |
| } |
| |
| riscv_aplic_set_enabled_raw(aplic, irq, enabled); |
| } |
| |
| static void riscv_aplic_set_enabled_word(RISCVAPLICState *aplic, |
| uint32_t word, uint32_t value, |
| bool enabled) |
| { |
| uint32_t i, irq; |
| |
| for (i = 0; i < 32; i++) { |
| irq = word * 32 + i; |
| if (!irq || aplic->num_irqs <= irq) { |
| continue; |
| } |
| |
| if (value & (1U << i)) { |
| riscv_aplic_set_enabled(aplic, irq, enabled); |
| } |
| } |
| } |
| |
| static void riscv_aplic_msi_send(RISCVAPLICState *aplic, |
| uint32_t hart_idx, uint32_t guest_idx, |
| uint32_t eiid) |
| { |
| uint64_t addr; |
| MemTxResult result; |
| RISCVAPLICState *aplic_m; |
| uint32_t lhxs, lhxw, hhxs, hhxw, group_idx, msicfgaddr, msicfgaddrH; |
| |
| aplic_m = aplic; |
| while (aplic_m && !aplic_m->mmode) { |
| aplic_m = aplic_m->parent; |
| } |
| if (!aplic_m) { |
| qemu_log_mask(LOG_GUEST_ERROR, "%s: m-level APLIC not found\n", |
| __func__); |
| return; |
| } |
| |
| if (aplic->mmode) { |
| msicfgaddr = aplic_m->mmsicfgaddr; |
| msicfgaddrH = aplic_m->mmsicfgaddrH; |
| } else { |
| msicfgaddr = aplic_m->smsicfgaddr; |
| msicfgaddrH = aplic_m->smsicfgaddrH; |
| } |
| |
| lhxs = (msicfgaddrH >> APLIC_xMSICFGADDRH_LHXS_SHIFT) & |
| APLIC_xMSICFGADDRH_LHXS_MASK; |
| lhxw = (msicfgaddrH >> APLIC_xMSICFGADDRH_LHXW_SHIFT) & |
| APLIC_xMSICFGADDRH_LHXW_MASK; |
| hhxs = (msicfgaddrH >> APLIC_xMSICFGADDRH_HHXS_SHIFT) & |
| APLIC_xMSICFGADDRH_HHXS_MASK; |
| hhxw = (msicfgaddrH >> APLIC_xMSICFGADDRH_HHXW_SHIFT) & |
| APLIC_xMSICFGADDRH_HHXW_MASK; |
| |
| group_idx = hart_idx >> lhxw; |
| hart_idx &= APLIC_xMSICFGADDR_PPN_LHX_MASK(lhxw); |
| |
| addr = msicfgaddr; |
| addr |= ((uint64_t)(msicfgaddrH & APLIC_xMSICFGADDRH_BAPPN_MASK)) << 32; |
| addr |= ((uint64_t)(group_idx & APLIC_xMSICFGADDR_PPN_HHX_MASK(hhxw))) << |
| APLIC_xMSICFGADDR_PPN_HHX_SHIFT(hhxs); |
| addr |= ((uint64_t)(hart_idx & APLIC_xMSICFGADDR_PPN_LHX_MASK(lhxw))) << |
| APLIC_xMSICFGADDR_PPN_LHX_SHIFT(lhxs); |
| addr |= (uint64_t)(guest_idx & APLIC_xMSICFGADDR_PPN_HART(lhxs)); |
| addr <<= APLIC_xMSICFGADDR_PPN_SHIFT; |
| |
| address_space_stl_le(&address_space_memory, addr, |
| eiid, MEMTXATTRS_UNSPECIFIED, &result); |
| if (result != MEMTX_OK) { |
| qemu_log_mask(LOG_GUEST_ERROR, "%s: MSI write failed for " |
| "hart_index=%d guest_index=%d eiid=%d\n", |
| __func__, hart_idx, guest_idx, eiid); |
| } |
| } |
| |
| static void riscv_aplic_msi_irq_update(RISCVAPLICState *aplic, uint32_t irq) |
| { |
| uint32_t hart_idx, guest_idx, eiid; |
| |
| if (!aplic->msimode || (aplic->num_irqs <= irq) || |
| !(aplic->domaincfg & APLIC_DOMAINCFG_IE)) { |
| return; |
| } |
| |
| if ((aplic->state[irq] & APLIC_ISTATE_ENPEND) != APLIC_ISTATE_ENPEND) { |
| return; |
| } |
| |
| riscv_aplic_set_pending_raw(aplic, irq, false); |
| |
| hart_idx = aplic->target[irq] >> APLIC_TARGET_HART_IDX_SHIFT; |
| hart_idx &= APLIC_TARGET_HART_IDX_MASK; |
| if (aplic->mmode) { |
| /* M-level APLIC ignores guest_index */ |
| guest_idx = 0; |
| } else { |
| guest_idx = aplic->target[irq] >> APLIC_TARGET_GUEST_IDX_SHIFT; |
| guest_idx &= APLIC_TARGET_GUEST_IDX_MASK; |
| } |
| eiid = aplic->target[irq] & APLIC_TARGET_EIID_MASK; |
| riscv_aplic_msi_send(aplic, hart_idx, guest_idx, eiid); |
| } |
| |
| static uint32_t riscv_aplic_idc_topi(RISCVAPLICState *aplic, uint32_t idc) |
| { |
| uint32_t best_irq, best_iprio; |
| uint32_t irq, iprio, ihartidx, ithres; |
| |
| if (aplic->num_harts <= idc) { |
| return 0; |
| } |
| |
| ithres = aplic->ithreshold[idc]; |
| best_irq = best_iprio = UINT32_MAX; |
| for (irq = 1; irq < aplic->num_irqs; irq++) { |
| if ((aplic->state[irq] & APLIC_ISTATE_ENPEND) != |
| APLIC_ISTATE_ENPEND) { |
| continue; |
| } |
| |
| ihartidx = aplic->target[irq] >> APLIC_TARGET_HART_IDX_SHIFT; |
| ihartidx &= APLIC_TARGET_HART_IDX_MASK; |
| if (ihartidx != idc) { |
| continue; |
| } |
| |
| iprio = aplic->target[irq] & aplic->iprio_mask; |
| if (ithres && iprio >= ithres) { |
| continue; |
| } |
| |
| if (iprio < best_iprio) { |
| best_irq = irq; |
| best_iprio = iprio; |
| } |
| } |
| |
| if (best_irq < aplic->num_irqs && best_iprio <= aplic->iprio_mask) { |
| return (best_irq << APLIC_IDC_TOPI_ID_SHIFT) | best_iprio; |
| } |
| |
| return 0; |
| } |
| |
| static void riscv_aplic_idc_update(RISCVAPLICState *aplic, uint32_t idc) |
| { |
| uint32_t topi; |
| |
| if (aplic->msimode || aplic->num_harts <= idc) { |
| return; |
| } |
| |
| topi = riscv_aplic_idc_topi(aplic, idc); |
| if ((aplic->domaincfg & APLIC_DOMAINCFG_IE) && |
| aplic->idelivery[idc] && |
| (aplic->iforce[idc] || topi)) { |
| qemu_irq_raise(aplic->external_irqs[idc]); |
| } else { |
| qemu_irq_lower(aplic->external_irqs[idc]); |
| } |
| } |
| |
| static uint32_t riscv_aplic_idc_claimi(RISCVAPLICState *aplic, uint32_t idc) |
| { |
| uint32_t irq, state, sm, topi = riscv_aplic_idc_topi(aplic, idc); |
| |
| if (!topi) { |
| aplic->iforce[idc] = 0; |
| return 0; |
| } |
| |
| irq = (topi >> APLIC_IDC_TOPI_ID_SHIFT) & APLIC_IDC_TOPI_ID_MASK; |
| sm = aplic->sourcecfg[irq] & APLIC_SOURCECFG_SM_MASK; |
| state = aplic->state[irq]; |
| riscv_aplic_set_pending_raw(aplic, irq, false); |
| if ((sm == APLIC_SOURCECFG_SM_LEVEL_HIGH) && |
| (state & APLIC_ISTATE_INPUT)) { |
| riscv_aplic_set_pending_raw(aplic, irq, true); |
| } else if ((sm == APLIC_SOURCECFG_SM_LEVEL_LOW) && |
| !(state & APLIC_ISTATE_INPUT)) { |
| riscv_aplic_set_pending_raw(aplic, irq, true); |
| } |
| riscv_aplic_idc_update(aplic, idc); |
| |
| return topi; |
| } |
| |
| static void riscv_aplic_request(void *opaque, int irq, int level) |
| { |
| bool update = false; |
| RISCVAPLICState *aplic = opaque; |
| uint32_t sourcecfg, childidx, state, idc; |
| |
| assert((0 < irq) && (irq < aplic->num_irqs)); |
| |
| sourcecfg = aplic->sourcecfg[irq]; |
| if (sourcecfg & APLIC_SOURCECFG_D) { |
| childidx = sourcecfg & APLIC_SOURCECFG_CHILDIDX_MASK; |
| if (childidx < aplic->num_children) { |
| riscv_aplic_request(aplic->children[childidx], irq, level); |
| } |
| return; |
| } |
| |
| state = aplic->state[irq]; |
| switch (sourcecfg & APLIC_SOURCECFG_SM_MASK) { |
| case APLIC_SOURCECFG_SM_EDGE_RISE: |
| if ((level > 0) && !(state & APLIC_ISTATE_INPUT) && |
| !(state & APLIC_ISTATE_PENDING)) { |
| riscv_aplic_set_pending_raw(aplic, irq, true); |
| update = true; |
| } |
| break; |
| case APLIC_SOURCECFG_SM_EDGE_FALL: |
| if ((level <= 0) && (state & APLIC_ISTATE_INPUT) && |
| !(state & APLIC_ISTATE_PENDING)) { |
| riscv_aplic_set_pending_raw(aplic, irq, true); |
| update = true; |
| } |
| break; |
| case APLIC_SOURCECFG_SM_LEVEL_HIGH: |
| if ((level > 0) && !(state & APLIC_ISTATE_PENDING)) { |
| riscv_aplic_set_pending_raw(aplic, irq, true); |
| update = true; |
| } |
| break; |
| case APLIC_SOURCECFG_SM_LEVEL_LOW: |
| if ((level <= 0) && !(state & APLIC_ISTATE_PENDING)) { |
| riscv_aplic_set_pending_raw(aplic, irq, true); |
| update = true; |
| } |
| break; |
| default: |
| break; |
| } |
| |
| if (level <= 0) { |
| aplic->state[irq] &= ~APLIC_ISTATE_INPUT; |
| } else { |
| aplic->state[irq] |= APLIC_ISTATE_INPUT; |
| } |
| |
| if (update) { |
| if (aplic->msimode) { |
| riscv_aplic_msi_irq_update(aplic, irq); |
| } else { |
| idc = aplic->target[irq] >> APLIC_TARGET_HART_IDX_SHIFT; |
| idc &= APLIC_TARGET_HART_IDX_MASK; |
| riscv_aplic_idc_update(aplic, idc); |
| } |
| } |
| } |
| |
| static uint64_t riscv_aplic_read(void *opaque, hwaddr addr, unsigned size) |
| { |
| uint32_t irq, word, idc; |
| RISCVAPLICState *aplic = opaque; |
| |
| /* Reads must be 4 byte words */ |
| if ((addr & 0x3) != 0) { |
| goto err; |
| } |
| |
| if (addr == APLIC_DOMAINCFG) { |
| return APLIC_DOMAINCFG_RDONLY | aplic->domaincfg | |
| (aplic->msimode ? APLIC_DOMAINCFG_DM : 0); |
| } else if ((APLIC_SOURCECFG_BASE <= addr) && |
| (addr < (APLIC_SOURCECFG_BASE + (aplic->num_irqs - 1) * 4))) { |
| irq = ((addr - APLIC_SOURCECFG_BASE) >> 2) + 1; |
| return aplic->sourcecfg[irq]; |
| } else if (aplic->mmode && aplic->msimode && |
| (addr == APLIC_MMSICFGADDR)) { |
| return aplic->mmsicfgaddr; |
| } else if (aplic->mmode && aplic->msimode && |
| (addr == APLIC_MMSICFGADDRH)) { |
| return aplic->mmsicfgaddrH; |
| } else if (aplic->mmode && aplic->msimode && |
| (addr == APLIC_SMSICFGADDR)) { |
| /* |
| * Registers SMSICFGADDR and SMSICFGADDRH are implemented only if: |
| * (a) the interrupt domain is at machine level |
| * (b) the domain's harts implement supervisor mode |
| * (c) the domain has one or more child supervisor-level domains |
| * that support MSI delivery mode (domaincfg.DM is not read- |
| * only zero in at least one of the supervisor-level child |
| * domains). |
| */ |
| return (aplic->num_children) ? aplic->smsicfgaddr : 0; |
| } else if (aplic->mmode && aplic->msimode && |
| (addr == APLIC_SMSICFGADDRH)) { |
| return (aplic->num_children) ? aplic->smsicfgaddrH : 0; |
| } else if ((APLIC_SETIP_BASE <= addr) && |
| (addr < (APLIC_SETIP_BASE + aplic->bitfield_words * 4))) { |
| word = (addr - APLIC_SETIP_BASE) >> 2; |
| return riscv_aplic_read_pending_word(aplic, word); |
| } else if (addr == APLIC_SETIPNUM) { |
| return 0; |
| } else if ((APLIC_CLRIP_BASE <= addr) && |
| (addr < (APLIC_CLRIP_BASE + aplic->bitfield_words * 4))) { |
| word = (addr - APLIC_CLRIP_BASE) >> 2; |
| return riscv_aplic_read_input_word(aplic, word); |
| } else if (addr == APLIC_CLRIPNUM) { |
| return 0; |
| } else if ((APLIC_SETIE_BASE <= addr) && |
| (addr < (APLIC_SETIE_BASE + aplic->bitfield_words * 4))) { |
| word = (addr - APLIC_SETIE_BASE) >> 2; |
| return riscv_aplic_read_enabled_word(aplic, word); |
| } else if (addr == APLIC_SETIENUM) { |
| return 0; |
| } else if ((APLIC_CLRIE_BASE <= addr) && |
| (addr < (APLIC_CLRIE_BASE + aplic->bitfield_words * 4))) { |
| return 0; |
| } else if (addr == APLIC_CLRIENUM) { |
| return 0; |
| } else if (addr == APLIC_SETIPNUM_LE) { |
| return 0; |
| } else if (addr == APLIC_SETIPNUM_BE) { |
| return 0; |
| } else if (addr == APLIC_GENMSI) { |
| return (aplic->msimode) ? aplic->genmsi : 0; |
| } else if ((APLIC_TARGET_BASE <= addr) && |
| (addr < (APLIC_TARGET_BASE + (aplic->num_irqs - 1) * 4))) { |
| irq = ((addr - APLIC_TARGET_BASE) >> 2) + 1; |
| return aplic->target[irq]; |
| } else if (!aplic->msimode && (APLIC_IDC_BASE <= addr) && |
| (addr < (APLIC_IDC_BASE + aplic->num_harts * APLIC_IDC_SIZE))) { |
| idc = (addr - APLIC_IDC_BASE) / APLIC_IDC_SIZE; |
| switch (addr - (APLIC_IDC_BASE + idc * APLIC_IDC_SIZE)) { |
| case APLIC_IDC_IDELIVERY: |
| return aplic->idelivery[idc]; |
| case APLIC_IDC_IFORCE: |
| return aplic->iforce[idc]; |
| case APLIC_IDC_ITHRESHOLD: |
| return aplic->ithreshold[idc]; |
| case APLIC_IDC_TOPI: |
| return riscv_aplic_idc_topi(aplic, idc); |
| case APLIC_IDC_CLAIMI: |
| return riscv_aplic_idc_claimi(aplic, idc); |
| default: |
| goto err; |
| }; |
| } |
| |
| err: |
| qemu_log_mask(LOG_GUEST_ERROR, |
| "%s: Invalid register read 0x%" HWADDR_PRIx "\n", |
| __func__, addr); |
| return 0; |
| } |
| |
| static void riscv_aplic_write(void *opaque, hwaddr addr, uint64_t value, |
| unsigned size) |
| { |
| RISCVAPLICState *aplic = opaque; |
| uint32_t irq, word, idc = UINT32_MAX; |
| |
| /* Writes must be 4 byte words */ |
| if ((addr & 0x3) != 0) { |
| goto err; |
| } |
| |
| if (addr == APLIC_DOMAINCFG) { |
| /* Only IE bit writable at the moment */ |
| value &= APLIC_DOMAINCFG_IE; |
| aplic->domaincfg = value; |
| } else if ((APLIC_SOURCECFG_BASE <= addr) && |
| (addr < (APLIC_SOURCECFG_BASE + (aplic->num_irqs - 1) * 4))) { |
| irq = ((addr - APLIC_SOURCECFG_BASE) >> 2) + 1; |
| if (!aplic->num_children && (value & APLIC_SOURCECFG_D)) { |
| value = 0; |
| } |
| if (value & APLIC_SOURCECFG_D) { |
| value &= (APLIC_SOURCECFG_D | APLIC_SOURCECFG_CHILDIDX_MASK); |
| } else { |
| value &= (APLIC_SOURCECFG_D | APLIC_SOURCECFG_SM_MASK); |
| } |
| aplic->sourcecfg[irq] = value; |
| if ((aplic->sourcecfg[irq] & APLIC_SOURCECFG_D) || |
| (aplic->sourcecfg[irq] == 0)) { |
| riscv_aplic_set_pending_raw(aplic, irq, false); |
| riscv_aplic_set_enabled_raw(aplic, irq, false); |
| } |
| } else if (aplic->mmode && aplic->msimode && |
| (addr == APLIC_MMSICFGADDR)) { |
| if (!(aplic->mmsicfgaddrH & APLIC_xMSICFGADDRH_L)) { |
| aplic->mmsicfgaddr = value; |
| } |
| } else if (aplic->mmode && aplic->msimode && |
| (addr == APLIC_MMSICFGADDRH)) { |
| if (!(aplic->mmsicfgaddrH & APLIC_xMSICFGADDRH_L)) { |
| aplic->mmsicfgaddrH = value & APLIC_xMSICFGADDRH_VALID_MASK; |
| } |
| } else if (aplic->mmode && aplic->msimode && |
| (addr == APLIC_SMSICFGADDR)) { |
| /* |
| * Registers SMSICFGADDR and SMSICFGADDRH are implemented only if: |
| * (a) the interrupt domain is at machine level |
| * (b) the domain's harts implement supervisor mode |
| * (c) the domain has one or more child supervisor-level domains |
| * that support MSI delivery mode (domaincfg.DM is not read- |
| * only zero in at least one of the supervisor-level child |
| * domains). |
| */ |
| if (aplic->num_children && |
| !(aplic->smsicfgaddrH & APLIC_xMSICFGADDRH_L)) { |
| aplic->smsicfgaddr = value; |
| } |
| } else if (aplic->mmode && aplic->msimode && |
| (addr == APLIC_SMSICFGADDRH)) { |
| if (aplic->num_children && |
| !(aplic->smsicfgaddrH & APLIC_xMSICFGADDRH_L)) { |
| aplic->smsicfgaddrH = value & APLIC_xMSICFGADDRH_VALID_MASK; |
| } |
| } else if ((APLIC_SETIP_BASE <= addr) && |
| (addr < (APLIC_SETIP_BASE + aplic->bitfield_words * 4))) { |
| word = (addr - APLIC_SETIP_BASE) >> 2; |
| riscv_aplic_set_pending_word(aplic, word, value, true); |
| } else if (addr == APLIC_SETIPNUM) { |
| riscv_aplic_set_pending(aplic, value, true); |
| } else if ((APLIC_CLRIP_BASE <= addr) && |
| (addr < (APLIC_CLRIP_BASE + aplic->bitfield_words * 4))) { |
| word = (addr - APLIC_CLRIP_BASE) >> 2; |
| riscv_aplic_set_pending_word(aplic, word, value, false); |
| } else if (addr == APLIC_CLRIPNUM) { |
| riscv_aplic_set_pending(aplic, value, false); |
| } else if ((APLIC_SETIE_BASE <= addr) && |
| (addr < (APLIC_SETIE_BASE + aplic->bitfield_words * 4))) { |
| word = (addr - APLIC_SETIE_BASE) >> 2; |
| riscv_aplic_set_enabled_word(aplic, word, value, true); |
| } else if (addr == APLIC_SETIENUM) { |
| riscv_aplic_set_enabled(aplic, value, true); |
| } else if ((APLIC_CLRIE_BASE <= addr) && |
| (addr < (APLIC_CLRIE_BASE + aplic->bitfield_words * 4))) { |
| word = (addr - APLIC_CLRIE_BASE) >> 2; |
| riscv_aplic_set_enabled_word(aplic, word, value, false); |
| } else if (addr == APLIC_CLRIENUM) { |
| riscv_aplic_set_enabled(aplic, value, false); |
| } else if (addr == APLIC_SETIPNUM_LE) { |
| riscv_aplic_set_pending(aplic, value, true); |
| } else if (addr == APLIC_SETIPNUM_BE) { |
| riscv_aplic_set_pending(aplic, bswap32(value), true); |
| } else if (addr == APLIC_GENMSI) { |
| if (aplic->msimode) { |
| aplic->genmsi = value & ~(APLIC_TARGET_GUEST_IDX_MASK << |
| APLIC_TARGET_GUEST_IDX_SHIFT); |
| riscv_aplic_msi_send(aplic, |
| value >> APLIC_TARGET_HART_IDX_SHIFT, |
| 0, |
| value & APLIC_TARGET_EIID_MASK); |
| } |
| } else if ((APLIC_TARGET_BASE <= addr) && |
| (addr < (APLIC_TARGET_BASE + (aplic->num_irqs - 1) * 4))) { |
| irq = ((addr - APLIC_TARGET_BASE) >> 2) + 1; |
| if (aplic->msimode) { |
| aplic->target[irq] = value; |
| } else { |
| aplic->target[irq] = (value & ~APLIC_TARGET_IPRIO_MASK) | |
| ((value & aplic->iprio_mask) ? |
| (value & aplic->iprio_mask) : 1); |
| } |
| } else if (!aplic->msimode && (APLIC_IDC_BASE <= addr) && |
| (addr < (APLIC_IDC_BASE + aplic->num_harts * APLIC_IDC_SIZE))) { |
| idc = (addr - APLIC_IDC_BASE) / APLIC_IDC_SIZE; |
| switch (addr - (APLIC_IDC_BASE + idc * APLIC_IDC_SIZE)) { |
| case APLIC_IDC_IDELIVERY: |
| aplic->idelivery[idc] = value & 0x1; |
| break; |
| case APLIC_IDC_IFORCE: |
| aplic->iforce[idc] = value & 0x1; |
| break; |
| case APLIC_IDC_ITHRESHOLD: |
| aplic->ithreshold[idc] = value & aplic->iprio_mask; |
| break; |
| default: |
| goto err; |
| }; |
| } else { |
| goto err; |
| } |
| |
| if (aplic->msimode) { |
| for (irq = 1; irq < aplic->num_irqs; irq++) { |
| riscv_aplic_msi_irq_update(aplic, irq); |
| } |
| } else { |
| if (idc == UINT32_MAX) { |
| for (idc = 0; idc < aplic->num_harts; idc++) { |
| riscv_aplic_idc_update(aplic, idc); |
| } |
| } else { |
| riscv_aplic_idc_update(aplic, idc); |
| } |
| } |
| |
| return; |
| |
| err: |
| qemu_log_mask(LOG_GUEST_ERROR, |
| "%s: Invalid register write 0x%" HWADDR_PRIx "\n", |
| __func__, addr); |
| } |
| |
| static const MemoryRegionOps riscv_aplic_ops = { |
| .read = riscv_aplic_read, |
| .write = riscv_aplic_write, |
| .endianness = DEVICE_LITTLE_ENDIAN, |
| .valid = { |
| .min_access_size = 4, |
| .max_access_size = 4 |
| } |
| }; |
| |
| static void riscv_aplic_realize(DeviceState *dev, Error **errp) |
| { |
| uint32_t i; |
| RISCVAPLICState *aplic = RISCV_APLIC(dev); |
| |
| aplic->bitfield_words = (aplic->num_irqs + 31) >> 5; |
| aplic->sourcecfg = g_new0(uint32_t, aplic->num_irqs); |
| aplic->state = g_new(uint32_t, aplic->num_irqs); |
| aplic->target = g_new0(uint32_t, aplic->num_irqs); |
| if (!aplic->msimode) { |
| for (i = 0; i < aplic->num_irqs; i++) { |
| aplic->target[i] = 1; |
| } |
| } |
| aplic->idelivery = g_new0(uint32_t, aplic->num_harts); |
| aplic->iforce = g_new0(uint32_t, aplic->num_harts); |
| aplic->ithreshold = g_new0(uint32_t, aplic->num_harts); |
| |
| memory_region_init_io(&aplic->mmio, OBJECT(dev), &riscv_aplic_ops, aplic, |
| TYPE_RISCV_APLIC, aplic->aperture_size); |
| sysbus_init_mmio(SYS_BUS_DEVICE(dev), &aplic->mmio); |
| |
| /* |
| * Only root APLICs have hardware IRQ lines. All non-root APLICs |
| * have IRQ lines delegated by their parent APLIC. |
| */ |
| if (!aplic->parent) { |
| qdev_init_gpio_in(dev, riscv_aplic_request, aplic->num_irqs); |
| } |
| |
| /* Create output IRQ lines for non-MSI mode */ |
| if (!aplic->msimode) { |
| aplic->external_irqs = g_malloc(sizeof(qemu_irq) * aplic->num_harts); |
| qdev_init_gpio_out(dev, aplic->external_irqs, aplic->num_harts); |
| |
| /* Claim the CPU interrupt to be triggered by this APLIC */ |
| for (i = 0; i < aplic->num_harts; i++) { |
| RISCVCPU *cpu = RISCV_CPU(cpu_by_arch_id(aplic->hartid_base + i)); |
| if (riscv_cpu_claim_interrupts(cpu, |
| (aplic->mmode) ? MIP_MEIP : MIP_SEIP) < 0) { |
| error_report("%s already claimed", |
| (aplic->mmode) ? "MEIP" : "SEIP"); |
| exit(1); |
| } |
| } |
| } |
| |
| msi_nonbroken = true; |
| } |
| |
| static Property riscv_aplic_properties[] = { |
| DEFINE_PROP_UINT32("aperture-size", RISCVAPLICState, aperture_size, 0), |
| DEFINE_PROP_UINT32("hartid-base", RISCVAPLICState, hartid_base, 0), |
| DEFINE_PROP_UINT32("num-harts", RISCVAPLICState, num_harts, 0), |
| DEFINE_PROP_UINT32("iprio-mask", RISCVAPLICState, iprio_mask, 0), |
| DEFINE_PROP_UINT32("num-irqs", RISCVAPLICState, num_irqs, 0), |
| DEFINE_PROP_BOOL("msimode", RISCVAPLICState, msimode, 0), |
| DEFINE_PROP_BOOL("mmode", RISCVAPLICState, mmode, 0), |
| DEFINE_PROP_END_OF_LIST(), |
| }; |
| |
| static const VMStateDescription vmstate_riscv_aplic = { |
| .name = "riscv_aplic", |
| .version_id = 1, |
| .minimum_version_id = 1, |
| .fields = (VMStateField[]) { |
| VMSTATE_UINT32(domaincfg, RISCVAPLICState), |
| VMSTATE_UINT32(mmsicfgaddr, RISCVAPLICState), |
| VMSTATE_UINT32(mmsicfgaddrH, RISCVAPLICState), |
| VMSTATE_UINT32(smsicfgaddr, RISCVAPLICState), |
| VMSTATE_UINT32(smsicfgaddrH, RISCVAPLICState), |
| VMSTATE_UINT32(genmsi, RISCVAPLICState), |
| VMSTATE_VARRAY_UINT32(sourcecfg, RISCVAPLICState, |
| num_irqs, 0, |
| vmstate_info_uint32, uint32_t), |
| VMSTATE_VARRAY_UINT32(state, RISCVAPLICState, |
| num_irqs, 0, |
| vmstate_info_uint32, uint32_t), |
| VMSTATE_VARRAY_UINT32(target, RISCVAPLICState, |
| num_irqs, 0, |
| vmstate_info_uint32, uint32_t), |
| VMSTATE_VARRAY_UINT32(idelivery, RISCVAPLICState, |
| num_harts, 0, |
| vmstate_info_uint32, uint32_t), |
| VMSTATE_VARRAY_UINT32(iforce, RISCVAPLICState, |
| num_harts, 0, |
| vmstate_info_uint32, uint32_t), |
| VMSTATE_VARRAY_UINT32(ithreshold, RISCVAPLICState, |
| num_harts, 0, |
| vmstate_info_uint32, uint32_t), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| static void riscv_aplic_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| |
| device_class_set_props(dc, riscv_aplic_properties); |
| dc->realize = riscv_aplic_realize; |
| dc->vmsd = &vmstate_riscv_aplic; |
| } |
| |
| static const TypeInfo riscv_aplic_info = { |
| .name = TYPE_RISCV_APLIC, |
| .parent = TYPE_SYS_BUS_DEVICE, |
| .instance_size = sizeof(RISCVAPLICState), |
| .class_init = riscv_aplic_class_init, |
| }; |
| |
| static void riscv_aplic_register_types(void) |
| { |
| type_register_static(&riscv_aplic_info); |
| } |
| |
| type_init(riscv_aplic_register_types) |
| |
| /* |
| * Add a APLIC device to another APLIC device as child for |
| * interrupt delegation. |
| */ |
| void riscv_aplic_add_child(DeviceState *parent, DeviceState *child) |
| { |
| RISCVAPLICState *caplic, *paplic; |
| |
| assert(parent && child); |
| caplic = RISCV_APLIC(child); |
| paplic = RISCV_APLIC(parent); |
| |
| assert(paplic->num_irqs == caplic->num_irqs); |
| assert(paplic->num_children <= QEMU_APLIC_MAX_CHILDREN); |
| |
| caplic->parent = paplic; |
| paplic->children[paplic->num_children] = caplic; |
| paplic->num_children++; |
| } |
| |
| /* |
| * Create APLIC device. |
| */ |
| DeviceState *riscv_aplic_create(hwaddr addr, hwaddr size, |
| uint32_t hartid_base, uint32_t num_harts, uint32_t num_sources, |
| uint32_t iprio_bits, bool msimode, bool mmode, DeviceState *parent) |
| { |
| DeviceState *dev = qdev_new(TYPE_RISCV_APLIC); |
| uint32_t i; |
| |
| assert(num_harts < APLIC_MAX_IDC); |
| assert((APLIC_IDC_BASE + (num_harts * APLIC_IDC_SIZE)) <= size); |
| assert(num_sources < APLIC_MAX_SOURCE); |
| assert(APLIC_MIN_IPRIO_BITS <= iprio_bits); |
| assert(iprio_bits <= APLIC_MAX_IPRIO_BITS); |
| |
| qdev_prop_set_uint32(dev, "aperture-size", size); |
| qdev_prop_set_uint32(dev, "hartid-base", hartid_base); |
| qdev_prop_set_uint32(dev, "num-harts", num_harts); |
| qdev_prop_set_uint32(dev, "iprio-mask", ((1U << iprio_bits) - 1)); |
| qdev_prop_set_uint32(dev, "num-irqs", num_sources + 1); |
| qdev_prop_set_bit(dev, "msimode", msimode); |
| qdev_prop_set_bit(dev, "mmode", mmode); |
| |
| sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal); |
| sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, addr); |
| |
| if (parent) { |
| riscv_aplic_add_child(parent, dev); |
| } |
| |
| if (!msimode) { |
| for (i = 0; i < num_harts; i++) { |
| CPUState *cpu = cpu_by_arch_id(hartid_base + i); |
| |
| qdev_connect_gpio_out_named(dev, NULL, i, |
| qdev_get_gpio_in(DEVICE(cpu), |
| (mmode) ? IRQ_M_EXT : IRQ_S_EXT)); |
| } |
| } |
| |
| return dev; |
| } |
