/* * OpenPIC emulation * * Copyright (c) 2004 Jocelyn Mayer * 2011 Alexander Graf * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ /* * * Based on OpenPic implementations: * - Intel GW80314 I/O companion chip developer's manual * - Motorola MPC8245 & MPC8540 user manuals. * - Motorola MCP750 (aka Raven) programmer manual. * - Motorola Harrier programmer manuel * * Serial interrupts, as implemented in Raven chipset are not supported yet. * */ #include "hw.h" #include "ppc/mac.h" #include "pci/pci.h" #include "openpic.h" #include "sysbus.h" #include "pci/msi.h" #include "qemu/bitops.h" #include "ppc.h" //#define DEBUG_OPENPIC #ifdef DEBUG_OPENPIC static const int debug_openpic = 1; #else static const int debug_openpic = 0; #endif #define DPRINTF(fmt, ...) do { \ if (debug_openpic) { \ printf(fmt , ## __VA_ARGS__); \ } \ } while (0) #define MAX_CPU 15 #define MAX_SRC 256 #define MAX_TMR 4 #define MAX_IPI 4 #define MAX_MSI 8 #define MAX_IRQ (MAX_SRC + MAX_IPI + MAX_TMR) #define VID 0x03 /* MPIC version ID */ /* OpenPIC capability flags */ #define OPENPIC_FLAG_IDR_CRIT (1 << 0) /* OpenPIC address map */ #define OPENPIC_GLB_REG_START 0x0 #define OPENPIC_GLB_REG_SIZE 0x10F0 #define OPENPIC_TMR_REG_START 0x10F0 #define OPENPIC_TMR_REG_SIZE 0x220 #define OPENPIC_MSI_REG_START 0x1600 #define OPENPIC_MSI_REG_SIZE 0x200 #define OPENPIC_SRC_REG_START 0x10000 #define OPENPIC_SRC_REG_SIZE (MAX_SRC * 0x20) #define OPENPIC_CPU_REG_START 0x20000 #define OPENPIC_CPU_REG_SIZE 0x100 + ((MAX_CPU - 1) * 0x1000) /* Raven */ #define RAVEN_MAX_CPU 2 #define RAVEN_MAX_EXT 48 #define RAVEN_MAX_IRQ 64 #define RAVEN_MAX_TMR MAX_TMR #define RAVEN_MAX_IPI MAX_IPI /* Interrupt definitions */ #define RAVEN_FE_IRQ (RAVEN_MAX_EXT) /* Internal functional IRQ */ #define RAVEN_ERR_IRQ (RAVEN_MAX_EXT + 1) /* Error IRQ */ #define RAVEN_TMR_IRQ (RAVEN_MAX_EXT + 2) /* First timer IRQ */ #define RAVEN_IPI_IRQ (RAVEN_TMR_IRQ + RAVEN_MAX_TMR) /* First IPI IRQ */ /* First doorbell IRQ */ #define RAVEN_DBL_IRQ (RAVEN_IPI_IRQ + (RAVEN_MAX_CPU * RAVEN_MAX_IPI)) /* FSL_MPIC_20 */ #define FSL_MPIC_20_MAX_CPU 1 #define FSL_MPIC_20_MAX_EXT 12 #define FSL_MPIC_20_MAX_INT 64 #define FSL_MPIC_20_MAX_IRQ MAX_IRQ /* Interrupt definitions */ /* IRQs, accessible through the IRQ region */ #define FSL_MPIC_20_EXT_IRQ 0x00 #define FSL_MPIC_20_INT_IRQ 0x10 #define FSL_MPIC_20_MSG_IRQ 0xb0 #define FSL_MPIC_20_MSI_IRQ 0xe0 /* These are available through separate regions, but for simplicity's sake mapped into the same number space */ #define FSL_MPIC_20_TMR_IRQ 0x100 #define FSL_MPIC_20_IPI_IRQ 0x104 /* * Block Revision Register1 (BRR1): QEMU does not fully emulate * any version on MPIC. So to start with, set the IP version to 0. * * NOTE: This is Freescale MPIC specific register. Keep it here till * this code is refactored for different variants of OPENPIC and MPIC. */ #define FSL_BRR1_IPID (0x0040 << 16) /* 16 bit IP-block ID */ #define FSL_BRR1_IPMJ (0x00 << 8) /* 8 bit IP major number */ #define FSL_BRR1_IPMN 0x00 /* 8 bit IP minor number */ #define FRR_NIRQ_SHIFT 16 #define FRR_NCPU_SHIFT 8 #define FRR_VID_SHIFT 0 #define VID_REVISION_1_2 2 #define VID_REVISION_1_3 3 #define VIR_GENERIC 0x00000000 /* Generic Vendor ID */ #define GCR_RESET 0x80000000 #define GCR_MODE_PASS 0x00000000 #define GCR_MODE_MIXED 0x20000000 #define GCR_MODE_PROXY 0x60000000 #define TBCR_CI 0x80000000 /* count inhibit */ #define TCCR_TOG 0x80000000 /* toggles when decrement to zero */ #define IDR_EP_SHIFT 31 #define IDR_EP_MASK (1 << IDR_EP_SHIFT) #define IDR_CI0_SHIFT 30 #define IDR_CI1_SHIFT 29 #define IDR_P1_SHIFT 1 #define IDR_P0_SHIFT 0 #define MSIIR_OFFSET 0x140 #define MSIIR_SRS_SHIFT 29 #define MSIIR_SRS_MASK (0x7 << MSIIR_SRS_SHIFT) #define MSIIR_IBS_SHIFT 24 #define MSIIR_IBS_MASK (0x1f << MSIIR_IBS_SHIFT) static int get_current_cpu(void) { CPUState *cpu_single_cpu; if (!cpu_single_env) { return -1; } cpu_single_cpu = ENV_GET_CPU(cpu_single_env); return cpu_single_cpu->cpu_index; } static uint32_t openpic_cpu_read_internal(void *opaque, hwaddr addr, int idx); static void openpic_cpu_write_internal(void *opaque, hwaddr addr, uint32_t val, int idx); typedef enum IRQType { IRQ_TYPE_NORMAL = 0, IRQ_TYPE_FSLINT, /* FSL internal interrupt -- level only */ IRQ_TYPE_FSLSPECIAL, /* FSL timer/IPI interrupt, edge, no polarity */ } IRQType; typedef struct IRQQueue { /* Round up to the nearest 64 IRQs so that the queue length * won't change when moving between 32 and 64 bit hosts. */ unsigned long queue[BITS_TO_LONGS((MAX_IRQ + 63) & ~63)]; int next; int priority; } IRQQueue; typedef struct IRQSource { uint32_t ivpr; /* IRQ vector/priority register */ uint32_t idr; /* IRQ destination register */ uint32_t destmask; /* bitmap of CPU destinations */ int last_cpu; int output; /* IRQ level, e.g. OPENPIC_OUTPUT_INT */ int pending; /* TRUE if IRQ is pending */ IRQType type; bool level:1; /* level-triggered */ bool nomask:1; /* critical interrupts ignore mask on some FSL MPICs */ } IRQSource; #define IVPR_MASK_SHIFT 31 #define IVPR_MASK_MASK (1 << IVPR_MASK_SHIFT) #define IVPR_ACTIVITY_SHIFT 30 #define IVPR_ACTIVITY_MASK (1 << IVPR_ACTIVITY_SHIFT) #define IVPR_MODE_SHIFT 29 #define IVPR_MODE_MASK (1 << IVPR_MODE_SHIFT) #define IVPR_POLARITY_SHIFT 23 #define IVPR_POLARITY_MASK (1 << IVPR_POLARITY_SHIFT) #define IVPR_SENSE_SHIFT 22 #define IVPR_SENSE_MASK (1 << IVPR_SENSE_SHIFT) #define IVPR_PRIORITY_MASK (0xF << 16) #define IVPR_PRIORITY(_ivprr_) ((int)(((_ivprr_) & IVPR_PRIORITY_MASK) >> 16)) #define IVPR_VECTOR(opp, _ivprr_) ((_ivprr_) & (opp)->vector_mask) /* IDR[EP/CI] are only for FSL MPIC prior to v4.0 */ #define IDR_EP 0x80000000 /* external pin */ #define IDR_CI 0x40000000 /* critical interrupt */ typedef struct IRQDest { int32_t ctpr; /* CPU current task priority */ IRQQueue raised; IRQQueue servicing; qemu_irq *irqs; /* Count of IRQ sources asserting on non-INT outputs */ uint32_t outputs_active[OPENPIC_OUTPUT_NB]; } IRQDest; typedef struct OpenPICState { SysBusDevice busdev; MemoryRegion mem; /* Behavior control */ uint32_t model; uint32_t flags; uint32_t nb_irqs; uint32_t vid; uint32_t vir; /* Vendor identification register */ uint32_t vector_mask; uint32_t tfrr_reset; uint32_t ivpr_reset; uint32_t idr_reset; uint32_t brr1; uint32_t mpic_mode_mask; /* Sub-regions */ MemoryRegion sub_io_mem[5]; /* Global registers */ uint32_t frr; /* Feature reporting register */ uint32_t gcr; /* Global configuration register */ uint32_t pir; /* Processor initialization register */ uint32_t spve; /* Spurious vector register */ uint32_t tfrr; /* Timer frequency reporting register */ /* Source registers */ IRQSource src[MAX_IRQ]; /* Local registers per output pin */ IRQDest dst[MAX_CPU]; uint32_t nb_cpus; /* Timer registers */ struct { uint32_t tccr; /* Global timer current count register */ uint32_t tbcr; /* Global timer base count register */ } timers[MAX_TMR]; /* Shared MSI registers */ struct { uint32_t msir; /* Shared Message Signaled Interrupt Register */ } msi[MAX_MSI]; uint32_t max_irq; uint32_t irq_ipi0; uint32_t irq_tim0; uint32_t irq_msi; } OpenPICState; static inline void IRQ_setbit(IRQQueue *q, int n_IRQ) { set_bit(n_IRQ, q->queue); } static inline void IRQ_resetbit(IRQQueue *q, int n_IRQ) { clear_bit(n_IRQ, q->queue); } static inline int IRQ_testbit(IRQQueue *q, int n_IRQ) { return test_bit(n_IRQ, q->queue); } static void IRQ_check(OpenPICState *opp, IRQQueue *q) { int irq = -1; int next = -1; int priority = -1; for (;;) { irq = find_next_bit(q->queue, opp->max_irq, irq + 1); if (irq == opp->max_irq) { break; } DPRINTF("IRQ_check: irq %d set ivpr_pr=%d pr=%d\n", irq, IVPR_PRIORITY(opp->src[irq].ivpr), priority); if (IVPR_PRIORITY(opp->src[irq].ivpr) > priority) { next = irq; priority = IVPR_PRIORITY(opp->src[irq].ivpr); } } q->next = next; q->priority = priority; } static int IRQ_get_next(OpenPICState *opp, IRQQueue *q) { /* XXX: optimize */ IRQ_check(opp, q); return q->next; } static void IRQ_local_pipe(OpenPICState *opp, int n_CPU, int n_IRQ, bool active, bool was_active) { IRQDest *dst; IRQSource *src; int priority; dst = &opp->dst[n_CPU]; src = &opp->src[n_IRQ]; DPRINTF("%s: IRQ %d active %d was %d\n", __func__, n_IRQ, active, was_active); if (src->output != OPENPIC_OUTPUT_INT) { DPRINTF("%s: output %d irq %d active %d was %d count %d\n", __func__, src->output, n_IRQ, active, was_active, dst->outputs_active[src->output]); /* On Freescale MPIC, critical interrupts ignore priority, * IACK, EOI, etc. Before MPIC v4.1 they also ignore * masking. */ if (active) { if (!was_active && dst->outputs_active[src->output]++ == 0) { DPRINTF("%s: Raise OpenPIC output %d cpu %d irq %d\n", __func__, src->output, n_CPU, n_IRQ); qemu_irq_raise(dst->irqs[src->output]); } } else { if (was_active && --dst->outputs_active[src->output] == 0) { DPRINTF("%s: Lower OpenPIC output %d cpu %d irq %d\n", __func__, src->output, n_CPU, n_IRQ); qemu_irq_lower(dst->irqs[src->output]); } } return; } priority = IVPR_PRIORITY(src->ivpr); /* Even if the interrupt doesn't have enough priority, * it is still raised, in case ctpr is lowered later. */ if (active) { IRQ_setbit(&dst->raised, n_IRQ); } else { IRQ_resetbit(&dst->raised, n_IRQ); } IRQ_check(opp, &dst->raised); if (active && priority <= dst->ctpr) { DPRINTF("%s: IRQ %d priority %d too low for ctpr %d on CPU %d\n", __func__, n_IRQ, priority, dst->ctpr, n_CPU); active = 0; } if (active) { if (IRQ_get_next(opp, &dst->servicing) >= 0 && priority <= dst->servicing.priority) { DPRINTF("%s: IRQ %d is hidden by servicing IRQ %d on CPU %d\n", __func__, n_IRQ, dst->servicing.next, n_CPU); } else { DPRINTF("%s: Raise OpenPIC INT output cpu %d irq %d/%d\n", __func__, n_CPU, n_IRQ, dst->raised.next); qemu_irq_raise(opp->dst[n_CPU].irqs[OPENPIC_OUTPUT_INT]); } } else { IRQ_get_next(opp, &dst->servicing); if (dst->raised.priority > dst->ctpr && dst->raised.priority > dst->servicing.priority) { DPRINTF("%s: IRQ %d inactive, IRQ %d prio %d above %d/%d, CPU %d\n", __func__, n_IRQ, dst->raised.next, dst->raised.priority, dst->ctpr, dst->servicing.priority, n_CPU); /* IRQ line stays asserted */ } else { DPRINTF("%s: IRQ %d inactive, current prio %d/%d, CPU %d\n", __func__, n_IRQ, dst->ctpr, dst->servicing.priority, n_CPU); qemu_irq_lower(opp->dst[n_CPU].irqs[OPENPIC_OUTPUT_INT]); } } } /* update pic state because registers for n_IRQ have changed value */ static void openpic_update_irq(OpenPICState *opp, int n_IRQ) { IRQSource *src; bool active, was_active; int i; src = &opp->src[n_IRQ]; active = src->pending; if ((src->ivpr & IVPR_MASK_MASK) && !src->nomask) { /* Interrupt source is disabled */ DPRINTF("%s: IRQ %d is disabled\n", __func__, n_IRQ); active = false; } was_active = !!(src->ivpr & IVPR_ACTIVITY_MASK); /* * We don't have a similar check for already-active because * ctpr may have changed and we need to withdraw the interrupt. */ if (!active && !was_active) { DPRINTF("%s: IRQ %d is already inactive\n", __func__, n_IRQ); return; } if (active) { src->ivpr |= IVPR_ACTIVITY_MASK; } else { src->ivpr &= ~IVPR_ACTIVITY_MASK; } if (src->idr == 0) { /* No target */ DPRINTF("%s: IRQ %d has no target\n", __func__, n_IRQ); return; } if (src->idr == (1 << src->last_cpu)) { /* Only one CPU is allowed to receive this IRQ */ IRQ_local_pipe(opp, src->last_cpu, n_IRQ, active, was_active); } else if (!(src->ivpr & IVPR_MODE_MASK)) { /* Directed delivery mode */ for (i = 0; i < opp->nb_cpus; i++) { if (src->destmask & (1 << i)) { IRQ_local_pipe(opp, i, n_IRQ, active, was_active); } } } else { /* Distributed delivery mode */ for (i = src->last_cpu + 1; i != src->last_cpu; i++) { if (i == opp->nb_cpus) { i = 0; } if (src->destmask & (1 << i)) { IRQ_local_pipe(opp, i, n_IRQ, active, was_active); src->last_cpu = i; break; } } } } static void openpic_set_irq(void *opaque, int n_IRQ, int level) { OpenPICState *opp = opaque; IRQSource *src; if (n_IRQ >= MAX_IRQ) { fprintf(stderr, "%s: IRQ %d out of range\n", __func__, n_IRQ); abort(); } src = &opp->src[n_IRQ]; DPRINTF("openpic: set irq %d = %d ivpr=0x%08x\n", n_IRQ, level, src->ivpr); if (src->level) { /* level-sensitive irq */ src->pending = level; openpic_update_irq(opp, n_IRQ); } else { /* edge-sensitive irq */ if (level) { src->pending = 1; openpic_update_irq(opp, n_IRQ); } if (src->output != OPENPIC_OUTPUT_INT) { /* Edge-triggered interrupts shouldn't be used * with non-INT delivery, but just in case, * try to make it do something sane rather than * cause an interrupt storm. This is close to * what you'd probably see happen in real hardware. */ src->pending = 0; openpic_update_irq(opp, n_IRQ); } } } static void openpic_reset(DeviceState *d) { OpenPICState *opp = FROM_SYSBUS(typeof(*opp), SYS_BUS_DEVICE(d)); int i; opp->gcr = GCR_RESET; /* Initialise controller registers */ opp->frr = ((opp->nb_irqs - 1) << FRR_NIRQ_SHIFT) | ((opp->nb_cpus - 1) << FRR_NCPU_SHIFT) | (opp->vid << FRR_VID_SHIFT); opp->pir = 0; opp->spve = -1 & opp->vector_mask; opp->tfrr = opp->tfrr_reset; /* Initialise IRQ sources */ for (i = 0; i < opp->max_irq; i++) { opp->src[i].ivpr = opp->ivpr_reset; opp->src[i].idr = opp->idr_reset; switch (opp->src[i].type) { case IRQ_TYPE_NORMAL: opp->src[i].level = !!(opp->ivpr_reset & IVPR_SENSE_MASK); break; case IRQ_TYPE_FSLINT: opp->src[i].ivpr |= IVPR_POLARITY_MASK; break; case IRQ_TYPE_FSLSPECIAL: break; } } /* Initialise IRQ destinations */ for (i = 0; i < MAX_CPU; i++) { opp->dst[i].ctpr = 15; memset(&opp->dst[i].raised, 0, sizeof(IRQQueue)); opp->dst[i].raised.next = -1; memset(&opp->dst[i].servicing, 0, sizeof(IRQQueue)); opp->dst[i].servicing.next = -1; } /* Initialise timers */ for (i = 0; i < MAX_TMR; i++) { opp->timers[i].tccr = 0; opp->timers[i].tbcr = TBCR_CI; } /* Go out of RESET state */ opp->gcr = 0; } static inline uint32_t read_IRQreg_idr(OpenPICState *opp, int n_IRQ) { return opp->src[n_IRQ].idr; } static inline uint32_t read_IRQreg_ivpr(OpenPICState *opp, int n_IRQ) { return opp->src[n_IRQ].ivpr; } static inline void write_IRQreg_idr(OpenPICState *opp, int n_IRQ, uint32_t val) { IRQSource *src = &opp->src[n_IRQ]; uint32_t normal_mask = (1UL << opp->nb_cpus) - 1; uint32_t crit_mask = 0; uint32_t mask = normal_mask; int crit_shift = IDR_EP_SHIFT - opp->nb_cpus; int i; if (opp->flags & OPENPIC_FLAG_IDR_CRIT) { crit_mask = mask << crit_shift; mask |= crit_mask | IDR_EP; } src->idr = val & mask; DPRINTF("Set IDR %d to 0x%08x\n", n_IRQ, src->idr); if (opp->flags & OPENPIC_FLAG_IDR_CRIT) { if (src->idr & crit_mask) { if (src->idr & normal_mask) { DPRINTF("%s: IRQ configured for multiple output types, using " "critical\n", __func__); } src->output = OPENPIC_OUTPUT_CINT; src->nomask = true; src->destmask = 0; for (i = 0; i < opp->nb_cpus; i++) { int n_ci = IDR_CI0_SHIFT - i; if (src->idr & (1UL << n_ci)) { src->destmask |= 1UL << i; } } } else { src->output = OPENPIC_OUTPUT_INT; src->nomask = false; src->destmask = src->idr & normal_mask; } } else { src->destmask = src->idr; } } static inline void write_IRQreg_ivpr(OpenPICState *opp, int n_IRQ, uint32_t val) { uint32_t mask; /* NOTE when implementing newer FSL MPIC models: starting with v4.0, * the polarity bit is read-only on internal interrupts. */ mask = IVPR_MASK_MASK | IVPR_PRIORITY_MASK | IVPR_SENSE_MASK | IVPR_POLARITY_MASK | opp->vector_mask; /* ACTIVITY bit is read-only */ opp->src[n_IRQ].ivpr = (opp->src[n_IRQ].ivpr & IVPR_ACTIVITY_MASK) | (val & mask); /* For FSL internal interrupts, The sense bit is reserved and zero, * and the interrupt is always level-triggered. Timers and IPIs * have no sense or polarity bits, and are edge-triggered. */ switch (opp->src[n_IRQ].type) { case IRQ_TYPE_NORMAL: opp->src[n_IRQ].level = !!(opp->src[n_IRQ].ivpr & IVPR_SENSE_MASK); break; case IRQ_TYPE_FSLINT: opp->src[n_IRQ].ivpr &= ~IVPR_SENSE_MASK; break; case IRQ_TYPE_FSLSPECIAL: opp->src[n_IRQ].ivpr &= ~(IVPR_POLARITY_MASK | IVPR_SENSE_MASK); break; } openpic_update_irq(opp, n_IRQ); DPRINTF("Set IVPR %d to 0x%08x -> 0x%08x\n", n_IRQ, val, opp->src[n_IRQ].ivpr); } static void openpic_gcr_write(OpenPICState *opp, uint64_t val) { bool mpic_proxy = false; if (val & GCR_RESET) { openpic_reset(&opp->busdev.qdev); return; } opp->gcr &= ~opp->mpic_mode_mask; opp->gcr |= val & opp->mpic_mode_mask; /* Set external proxy mode */ if ((val & opp->mpic_mode_mask) == GCR_MODE_PROXY) { mpic_proxy = true; } ppce500_set_mpic_proxy(mpic_proxy); } static void openpic_gbl_write(void *opaque, hwaddr addr, uint64_t val, unsigned len) { OpenPICState *opp = opaque; IRQDest *dst; int idx; DPRINTF("%s: addr %#" HWADDR_PRIx " <= %08" PRIx64 "\n", __func__, addr, val); if (addr & 0xF) { return; } switch (addr) { case 0x00: /* Block Revision Register1 (BRR1) is Readonly */ break; case 0x40: case 0x50: case 0x60: case 0x70: case 0x80: case 0x90: case 0xA0: case 0xB0: openpic_cpu_write_internal(opp, addr, val, get_current_cpu()); break; case 0x1000: /* FRR */ break; case 0x1020: /* GCR */ openpic_gcr_write(opp, val); break; case 0x1080: /* VIR */ break; case 0x1090: /* PIR */ for (idx = 0; idx < opp->nb_cpus; idx++) { if ((val & (1 << idx)) && !(opp->pir & (1 << idx))) { DPRINTF("Raise OpenPIC RESET output for CPU %d\n", idx); dst = &opp->dst[idx]; qemu_irq_raise(dst->irqs[OPENPIC_OUTPUT_RESET]); } else if (!(val & (1 << idx)) && (opp->pir & (1 << idx))) { DPRINTF("Lower OpenPIC RESET output for CPU %d\n", idx); dst = &opp->dst[idx]; qemu_irq_lower(dst->irqs[OPENPIC_OUTPUT_RESET]); } } opp->pir = val; break; case 0x10A0: /* IPI_IVPR */ case 0x10B0: case 0x10C0: case 0x10D0: { int idx; idx = (addr - 0x10A0) >> 4; write_IRQreg_ivpr(opp, opp->irq_ipi0 + idx, val); } break; case 0x10E0: /* SPVE */ opp->spve = val & opp->vector_mask; break; default: break; } } static uint64_t openpic_gbl_read(void *opaque, hwaddr addr, unsigned len) { OpenPICState *opp = opaque; uint32_t retval; DPRINTF("%s: addr %#" HWADDR_PRIx "\n", __func__, addr); retval = 0xFFFFFFFF; if (addr & 0xF) { return retval; } switch (addr) { case 0x1000: /* FRR */ retval = opp->frr; break; case 0x1020: /* GCR */ retval = opp->gcr; break; case 0x1080: /* VIR */ retval = opp->vir; break; case 0x1090: /* PIR */ retval = 0x00000000; break; case 0x00: /* Block Revision Register1 (BRR1) */ retval = opp->brr1; break; case 0x40: case 0x50: case 0x60: case 0x70: case 0x80: case 0x90: case 0xA0: case 0xB0: retval = openpic_cpu_read_internal(opp, addr, get_current_cpu()); break; case 0x10A0: /* IPI_IVPR */ case 0x10B0: case 0x10C0: case 0x10D0: { int idx; idx = (addr - 0x10A0) >> 4; retval = read_IRQreg_ivpr(opp, opp->irq_ipi0 + idx); } break; case 0x10E0: /* SPVE */ retval = opp->spve; break; default: break; } DPRINTF("%s: => 0x%08x\n", __func__, retval); return retval; } static void openpic_tmr_write(void *opaque, hwaddr addr, uint64_t val, unsigned len) { OpenPICState *opp = opaque; int idx; DPRINTF("%s: addr %#" HWADDR_PRIx " <= %08" PRIx64 "\n", __func__, addr, val); if (addr & 0xF) { return; } idx = (addr >> 6) & 0x3; addr = addr & 0x30; if (addr == 0x0) { /* TFRR */ opp->tfrr = val; return; } switch (addr & 0x30) { case 0x00: /* TCCR */ break; case 0x10: /* TBCR */ if ((opp->timers[idx].tccr & TCCR_TOG) != 0 && (val & TBCR_CI) == 0 && (opp->timers[idx].tbcr & TBCR_CI) != 0) { opp->timers[idx].tccr &= ~TCCR_TOG; } opp->timers[idx].tbcr = val; break; case 0x20: /* TVPR */ write_IRQreg_ivpr(opp, opp->irq_tim0 + idx, val); break; case 0x30: /* TDR */ write_IRQreg_idr(opp, opp->irq_tim0 + idx, val); break; } } static uint64_t openpic_tmr_read(void *opaque, hwaddr addr, unsigned len) { OpenPICState *opp = opaque; uint32_t retval = -1; int idx; DPRINTF("%s: addr %#" HWADDR_PRIx "\n", __func__, addr); if (addr & 0xF) { goto out; } idx = (addr >> 6) & 0x3; if (addr == 0x0) { /* TFRR */ retval = opp->tfrr; goto out; } switch (addr & 0x30) { case 0x00: /* TCCR */ retval = opp->timers[idx].tccr; break; case 0x10: /* TBCR */ retval = opp->timers[idx].tbcr; break; case 0x20: /* TIPV */ retval = read_IRQreg_ivpr(opp, opp->irq_tim0 + idx); break; case 0x30: /* TIDE (TIDR) */ retval = read_IRQreg_idr(opp, opp->irq_tim0 + idx); break; } out: DPRINTF("%s: => 0x%08x\n", __func__, retval); return retval; } static void openpic_src_write(void *opaque, hwaddr addr, uint64_t val, unsigned len) { OpenPICState *opp = opaque; int idx; DPRINTF("%s: addr %#" HWADDR_PRIx " <= %08" PRIx64 "\n", __func__, addr, val); if (addr & 0xF) { return; } addr = addr & 0xFFF0; idx = addr >> 5; if (addr & 0x10) { /* EXDE / IFEDE / IEEDE */ write_IRQreg_idr(opp, idx, val); } else { /* EXVP / IFEVP / IEEVP */ write_IRQreg_ivpr(opp, idx, val); } } static uint64_t openpic_src_read(void *opaque, uint64_t addr, unsigned len) { OpenPICState *opp = opaque; uint32_t retval; int idx; DPRINTF("%s: addr %#" HWADDR_PRIx "\n", __func__, addr); retval = 0xFFFFFFFF; if (addr & 0xF) { return retval; } addr = addr & 0xFFF0; idx = addr >> 5; if (addr & 0x10) { /* EXDE / IFEDE / IEEDE */ retval = read_IRQreg_idr(opp, idx); } else { /* EXVP / IFEVP / IEEVP */ retval = read_IRQreg_ivpr(opp, idx); } DPRINTF("%s: => 0x%08x\n", __func__, retval); return retval; } static void openpic_msi_write(void *opaque, hwaddr addr, uint64_t val, unsigned size) { OpenPICState *opp = opaque; int idx = opp->irq_msi; int srs, ibs; DPRINTF("%s: addr %#" HWADDR_PRIx " <= 0x%08" PRIx64 "\n", __func__, addr, val); if (addr & 0xF) { return; } switch (addr) { case MSIIR_OFFSET: srs = val >> MSIIR_SRS_SHIFT; idx += srs; ibs = (val & MSIIR_IBS_MASK) >> MSIIR_IBS_SHIFT; opp->msi[srs].msir |= 1 << ibs; openpic_set_irq(opp, idx, 1); break; default: /* most registers are read-only, thus ignored */ break; } } static uint64_t openpic_msi_read(void *opaque, hwaddr addr, unsigned size) { OpenPICState *opp = opaque; uint64_t r = 0; int i, srs; DPRINTF("%s: addr %#" HWADDR_PRIx "\n", __func__, addr); if (addr & 0xF) { return -1; } srs = addr >> 4; switch (addr) { case 0x00: case 0x10: case 0x20: case 0x30: case 0x40: case 0x50: case 0x60: case 0x70: /* MSIRs */ r = opp->msi[srs].msir; /* Clear on read */ opp->msi[srs].msir = 0; openpic_set_irq(opp, opp->irq_msi + srs, 0); break; case 0x120: /* MSISR */ for (i = 0; i < MAX_MSI; i++) { r |= (opp->msi[i].msir ? 1 : 0) << i; } break; } return r; } static void openpic_cpu_write_internal(void *opaque, hwaddr addr, uint32_t val, int idx) { OpenPICState *opp = opaque; IRQSource *src; IRQDest *dst; int s_IRQ, n_IRQ; DPRINTF("%s: cpu %d addr %#" HWADDR_PRIx " <= 0x%08x\n", __func__, idx, addr, val); if (idx < 0) { return; } if (addr & 0xF) { return; } dst = &opp->dst[idx]; addr &= 0xFF0; switch (addr) { case 0x40: /* IPIDR */ case 0x50: case 0x60: case 0x70: idx = (addr - 0x40) >> 4; /* we use IDE as mask which CPUs to deliver the IPI to still. */ write_IRQreg_idr(opp, opp->irq_ipi0 + idx, opp->src[opp->irq_ipi0 + idx].idr | val); openpic_set_irq(opp, opp->irq_ipi0 + idx, 1); openpic_set_irq(opp, opp->irq_ipi0 + idx, 0); break; case 0x80: /* CTPR */ dst->ctpr = val & 0x0000000F; DPRINTF("%s: set CPU %d ctpr to %d, raised %d servicing %d\n", __func__, idx, dst->ctpr, dst->raised.priority, dst->servicing.priority); if (dst->raised.priority <= dst->ctpr) { DPRINTF("%s: Lower OpenPIC INT output cpu %d due to ctpr\n", __func__, idx); qemu_irq_lower(dst->irqs[OPENPIC_OUTPUT_INT]); } else if (dst->raised.priority > dst->servicing.priority) { DPRINTF("%s: Raise OpenPIC INT output cpu %d irq %d\n", __func__, idx, dst->raised.next); qemu_irq_raise(dst->irqs[OPENPIC_OUTPUT_INT]); } break; case 0x90: /* WHOAMI */ /* Read-only register */ break; case 0xA0: /* IACK */ /* Read-only register */ break; case 0xB0: /* EOI */ DPRINTF("EOI\n"); s_IRQ = IRQ_get_next(opp, &dst->servicing); if (s_IRQ < 0) { DPRINTF("%s: EOI with no interrupt in service\n", __func__); break; } IRQ_resetbit(&dst->servicing, s_IRQ); /* Set up next servicing IRQ */ s_IRQ = IRQ_get_next(opp, &dst->servicing); /* Check queued interrupts. */ n_IRQ = IRQ_get_next(opp, &dst->raised); src = &opp->src[n_IRQ]; if (n_IRQ != -1 && (s_IRQ == -1 || IVPR_PRIORITY(src->ivpr) > dst->servicing.priority)) { DPRINTF("Raise OpenPIC INT output cpu %d irq %d\n", idx, n_IRQ); qemu_irq_raise(opp->dst[idx].irqs[OPENPIC_OUTPUT_INT]); } break; default: break; } } static void openpic_cpu_write(void *opaque, hwaddr addr, uint64_t val, unsigned len) { openpic_cpu_write_internal(opaque, addr, val, (addr & 0x1f000) >> 12); } static uint32_t openpic_iack(OpenPICState *opp, IRQDest *dst, int cpu) { IRQSource *src; int retval, irq; DPRINTF("Lower OpenPIC INT output\n"); qemu_irq_lower(dst->irqs[OPENPIC_OUTPUT_INT]); irq = IRQ_get_next(opp, &dst->raised); DPRINTF("IACK: irq=%d\n", irq); if (irq == -1) { /* No more interrupt pending */ return opp->spve; } src = &opp->src[irq]; if (!(src->ivpr & IVPR_ACTIVITY_MASK) || !(IVPR_PRIORITY(src->ivpr) > dst->ctpr)) { fprintf(stderr, "%s: bad raised IRQ %d ctpr %d ivpr 0x%08x\n", __func__, irq, dst->ctpr, src->ivpr); openpic_update_irq(opp, irq); retval = opp->spve; } else { /* IRQ enter servicing state */ IRQ_setbit(&dst->servicing, irq); retval = IVPR_VECTOR(opp, src->ivpr); } if (!src->level) { /* edge-sensitive IRQ */ src->ivpr &= ~IVPR_ACTIVITY_MASK; src->pending = 0; IRQ_resetbit(&dst->raised, irq); } if ((irq >= opp->irq_ipi0) && (irq < (opp->irq_ipi0 + MAX_IPI))) { src->idr &= ~(1 << cpu); if (src->idr && !src->level) { /* trigger on CPUs that didn't know about it yet */ openpic_set_irq(opp, irq, 1); openpic_set_irq(opp, irq, 0); /* if all CPUs knew about it, set active bit again */ src->ivpr |= IVPR_ACTIVITY_MASK; } } return retval; } static uint32_t openpic_cpu_read_internal(void *opaque, hwaddr addr, int idx) { OpenPICState *opp = opaque; IRQDest *dst; uint32_t retval; DPRINTF("%s: cpu %d addr %#" HWADDR_PRIx "\n", __func__, idx, addr); retval = 0xFFFFFFFF; if (idx < 0) { return retval; } if (addr & 0xF) { return retval; } dst = &opp->dst[idx]; addr &= 0xFF0; switch (addr) { case 0x80: /* CTPR */ retval = dst->ctpr; break; case 0x90: /* WHOAMI */ retval = idx; break; case 0xA0: /* IACK */ retval = openpic_iack(opp, dst, idx); break; case 0xB0: /* EOI */ retval = 0; break; default: break; } DPRINTF("%s: => 0x%08x\n", __func__, retval); return retval; } static uint64_t openpic_cpu_read(void *opaque, hwaddr addr, unsigned len) { return openpic_cpu_read_internal(opaque, addr, (addr & 0x1f000) >> 12); } static const MemoryRegionOps openpic_glb_ops_le = { .write = openpic_gbl_write, .read = openpic_gbl_read, .endianness = DEVICE_LITTLE_ENDIAN, .impl = { .min_access_size = 4, .max_access_size = 4, }, }; static const MemoryRegionOps openpic_glb_ops_be = { .write = openpic_gbl_write, .read = openpic_gbl_read, .endianness = DEVICE_BIG_ENDIAN, .impl = { .min_access_size = 4, .max_access_size = 4, }, }; static const MemoryRegionOps openpic_tmr_ops_le = { .write = openpic_tmr_write, .read = openpic_tmr_read, .endianness = DEVICE_LITTLE_ENDIAN, .impl = { .min_access_size = 4, .max_access_size = 4, }, }; static const MemoryRegionOps openpic_tmr_ops_be = { .write = openpic_tmr_write, .read = openpic_tmr_read, .endianness = DEVICE_BIG_ENDIAN, .impl = { .min_access_size = 4, .max_access_size = 4, }, }; static const MemoryRegionOps openpic_cpu_ops_le = { .write = openpic_cpu_write, .read = openpic_cpu_read, .endianness = DEVICE_LITTLE_ENDIAN, .impl = { .min_access_size = 4, .max_access_size = 4, }, }; static const MemoryRegionOps openpic_cpu_ops_be = { .write = openpic_cpu_write, .read = openpic_cpu_read, .endianness = DEVICE_BIG_ENDIAN, .impl = { .min_access_size = 4, .max_access_size = 4, }, }; static const MemoryRegionOps openpic_src_ops_le = { .write = openpic_src_write, .read = openpic_src_read, .endianness = DEVICE_LITTLE_ENDIAN, .impl = { .min_access_size = 4, .max_access_size = 4, }, }; static const MemoryRegionOps openpic_src_ops_be = { .write = openpic_src_write, .read = openpic_src_read, .endianness = DEVICE_BIG_ENDIAN, .impl = { .min_access_size = 4, .max_access_size = 4, }, }; static const MemoryRegionOps openpic_msi_ops_le = { .read = openpic_msi_read, .write = openpic_msi_write, .endianness = DEVICE_LITTLE_ENDIAN, .impl = { .min_access_size = 4, .max_access_size = 4, }, }; static const MemoryRegionOps openpic_msi_ops_be = { .read = openpic_msi_read, .write = openpic_msi_write, .endianness = DEVICE_BIG_ENDIAN, .impl = { .min_access_size = 4, .max_access_size = 4, }, }; static void openpic_save_IRQ_queue(QEMUFile* f, IRQQueue *q) { unsigned int i; for (i = 0; i < ARRAY_SIZE(q->queue); i++) { /* Always put the lower half of a 64-bit long first, in case we * restore on a 32-bit host. The least significant bits correspond * to lower IRQ numbers in the bitmap. */ qemu_put_be32(f, (uint32_t)q->queue[i]); #if LONG_MAX > 0x7FFFFFFF qemu_put_be32(f, (uint32_t)(q->queue[i] >> 32)); #endif } qemu_put_sbe32s(f, &q->next); qemu_put_sbe32s(f, &q->priority); } static void openpic_save(QEMUFile* f, void *opaque) { OpenPICState *opp = (OpenPICState *)opaque; unsigned int i; qemu_put_be32s(f, &opp->gcr); qemu_put_be32s(f, &opp->vir); qemu_put_be32s(f, &opp->pir); qemu_put_be32s(f, &opp->spve); qemu_put_be32s(f, &opp->tfrr); qemu_put_be32s(f, &opp->nb_cpus); for (i = 0; i < opp->nb_cpus; i++) { qemu_put_sbe32s(f, &opp->dst[i].ctpr); openpic_save_IRQ_queue(f, &opp->dst[i].raised); openpic_save_IRQ_queue(f, &opp->dst[i].servicing); qemu_put_buffer(f, (uint8_t *)&opp->dst[i].outputs_active, sizeof(opp->dst[i].outputs_active)); } for (i = 0; i < MAX_TMR; i++) { qemu_put_be32s(f, &opp->timers[i].tccr); qemu_put_be32s(f, &opp->timers[i].tbcr); } for (i = 0; i < opp->max_irq; i++) { qemu_put_be32s(f, &opp->src[i].ivpr); qemu_put_be32s(f, &opp->src[i].idr); qemu_put_sbe32s(f, &opp->src[i].last_cpu); qemu_put_sbe32s(f, &opp->src[i].pending); } } static void openpic_load_IRQ_queue(QEMUFile* f, IRQQueue *q) { unsigned int i; for (i = 0; i < ARRAY_SIZE(q->queue); i++) { unsigned long val; val = qemu_get_be32(f); #if LONG_MAX > 0x7FFFFFFF val <<= 32; val |= qemu_get_be32(f); #endif q->queue[i] = val; } qemu_get_sbe32s(f, &q->next); qemu_get_sbe32s(f, &q->priority); } static int openpic_load(QEMUFile* f, void *opaque, int version_id) { OpenPICState *opp = (OpenPICState *)opaque; unsigned int i; if (version_id != 1) { return -EINVAL; } qemu_get_be32s(f, &opp->gcr); qemu_get_be32s(f, &opp->vir); qemu_get_be32s(f, &opp->pir); qemu_get_be32s(f, &opp->spve); qemu_get_be32s(f, &opp->tfrr); qemu_get_be32s(f, &opp->nb_cpus); for (i = 0; i < opp->nb_cpus; i++) { qemu_get_sbe32s(f, &opp->dst[i].ctpr); openpic_load_IRQ_queue(f, &opp->dst[i].raised); openpic_load_IRQ_queue(f, &opp->dst[i].servicing); qemu_get_buffer(f, (uint8_t *)&opp->dst[i].outputs_active, sizeof(opp->dst[i].outputs_active)); } for (i = 0; i < MAX_TMR; i++) { qemu_get_be32s(f, &opp->timers[i].tccr); qemu_get_be32s(f, &opp->timers[i].tbcr); } for (i = 0; i < opp->max_irq; i++) { uint32_t val; val = qemu_get_be32(f); write_IRQreg_idr(opp, i, val); val = qemu_get_be32(f); write_IRQreg_ivpr(opp, i, val); qemu_get_be32s(f, &opp->src[i].ivpr); qemu_get_be32s(f, &opp->src[i].idr); qemu_get_sbe32s(f, &opp->src[i].last_cpu); qemu_get_sbe32s(f, &opp->src[i].pending); } return 0; } typedef struct MemReg { const char *name; MemoryRegionOps const *ops; bool map; hwaddr start_addr; ram_addr_t size; } MemReg; static int openpic_init(SysBusDevice *dev) { OpenPICState *opp = FROM_SYSBUS(typeof (*opp), dev); int i, j; MemReg list_le[] = { {"glb", &openpic_glb_ops_le, true, OPENPIC_GLB_REG_START, OPENPIC_GLB_REG_SIZE}, {"tmr", &openpic_tmr_ops_le, true, OPENPIC_TMR_REG_START, OPENPIC_TMR_REG_SIZE}, {"msi", &openpic_msi_ops_le, true, OPENPIC_MSI_REG_START, OPENPIC_MSI_REG_SIZE}, {"src", &openpic_src_ops_le, true, OPENPIC_SRC_REG_START, OPENPIC_SRC_REG_SIZE}, {"cpu", &openpic_cpu_ops_le, true, OPENPIC_CPU_REG_START, OPENPIC_CPU_REG_SIZE}, }; MemReg list_be[] = { {"glb", &openpic_glb_ops_be, true, OPENPIC_GLB_REG_START, OPENPIC_GLB_REG_SIZE}, {"tmr", &openpic_tmr_ops_be, true, OPENPIC_TMR_REG_START, OPENPIC_TMR_REG_SIZE}, {"msi", &openpic_msi_ops_be, true, OPENPIC_MSI_REG_START, OPENPIC_MSI_REG_SIZE}, {"src", &openpic_src_ops_be, true, OPENPIC_SRC_REG_START, OPENPIC_SRC_REG_SIZE}, {"cpu", &openpic_cpu_ops_be, true, OPENPIC_CPU_REG_START, OPENPIC_CPU_REG_SIZE}, }; MemReg *list; switch (opp->model) { case OPENPIC_MODEL_FSL_MPIC_20: default: opp->flags |= OPENPIC_FLAG_IDR_CRIT; opp->nb_irqs = 80; opp->vid = VID_REVISION_1_2; opp->vir = VIR_GENERIC; opp->vector_mask = 0xFFFF; opp->tfrr_reset = 0; opp->ivpr_reset = IVPR_MASK_MASK; opp->idr_reset = 1 << 0; opp->max_irq = FSL_MPIC_20_MAX_IRQ; opp->irq_ipi0 = FSL_MPIC_20_IPI_IRQ; opp->irq_tim0 = FSL_MPIC_20_TMR_IRQ; opp->irq_msi = FSL_MPIC_20_MSI_IRQ; opp->brr1 = FSL_BRR1_IPID | FSL_BRR1_IPMJ | FSL_BRR1_IPMN; /* XXX really only available as of MPIC 4.0 */ opp->mpic_mode_mask = GCR_MODE_PROXY; msi_supported = true; list = list_be; for (i = 0; i < FSL_MPIC_20_MAX_EXT; i++) { opp->src[i].level = false; } /* Internal interrupts, including message and MSI */ for (i = 16; i < MAX_SRC; i++) { opp->src[i].type = IRQ_TYPE_FSLINT; opp->src[i].level = true; } /* timers and IPIs */ for (i = MAX_SRC; i < MAX_IRQ; i++) { opp->src[i].type = IRQ_TYPE_FSLSPECIAL; opp->src[i].level = false; } break; case OPENPIC_MODEL_RAVEN: opp->nb_irqs = RAVEN_MAX_EXT; opp->vid = VID_REVISION_1_3; opp->vir = VIR_GENERIC; opp->vector_mask = 0xFF; opp->tfrr_reset = 4160000; opp->ivpr_reset = IVPR_MASK_MASK | IVPR_MODE_MASK; opp->idr_reset = 0; opp->max_irq = RAVEN_MAX_IRQ; opp->irq_ipi0 = RAVEN_IPI_IRQ; opp->irq_tim0 = RAVEN_TMR_IRQ; opp->brr1 = -1; opp->mpic_mode_mask = GCR_MODE_MIXED; list = list_le; /* Don't map MSI region */ list[2].map = false; /* Only UP supported today */ if (opp->nb_cpus != 1) { return -EINVAL; } break; } memory_region_init(&opp->mem, "openpic", 0x40000); for (i = 0; i < ARRAY_SIZE(list_le); i++) { if (!list[i].map) { continue; } memory_region_init_io(&opp->sub_io_mem[i], list[i].ops, opp, list[i].name, list[i].size); memory_region_add_subregion(&opp->mem, list[i].start_addr, &opp->sub_io_mem[i]); } for (i = 0; i < opp->nb_cpus; i++) { opp->dst[i].irqs = g_new(qemu_irq, OPENPIC_OUTPUT_NB); for (j = 0; j < OPENPIC_OUTPUT_NB; j++) { sysbus_init_irq(dev, &opp->dst[i].irqs[j]); } } register_savevm(&opp->busdev.qdev, "openpic", 0, 2, openpic_save, openpic_load, opp); sysbus_init_mmio(dev, &opp->mem); qdev_init_gpio_in(&dev->qdev, openpic_set_irq, opp->max_irq); return 0; } static Property openpic_properties[] = { DEFINE_PROP_UINT32("model", OpenPICState, model, OPENPIC_MODEL_FSL_MPIC_20), DEFINE_PROP_UINT32("nb_cpus", OpenPICState, nb_cpus, 1), DEFINE_PROP_END_OF_LIST(), }; static void openpic_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); k->init = openpic_init; dc->props = openpic_properties; dc->reset = openpic_reset; } static const TypeInfo openpic_info = { .name = "openpic", .parent = TYPE_SYS_BUS_DEVICE, .instance_size = sizeof(OpenPICState), .class_init = openpic_class_init, }; static void openpic_register_types(void) { type_register_static(&openpic_info); } type_init(openpic_register_types)