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be7c236fa2
qemu/hw/openpic.c
Scott Wood be7c236fa2 openpic: make register names correspond better with hw docs 
The base openpic specification doesn't provide abbreviated register
names, so it's somewhat understandable that the QEMU code made up
its own, except that most of the names that QEMU used didn't correspond
to the terminology used by any implementation I could find.

In some cases, like PCTP, the phrase "processor current task priority"
could be found in the openpic spec when describing the concept, but
the register itself was labelled "current task priority register"
and every implementation seems to use either CTPR or the full phrase.

In other cases, individual implementations disagree on what to call
the register.  The implementations I have documentation for are
Freescale, Raven (MCP750), and IBM.  The Raven docs tend to not use
abbreviations at all.  The IBM MPIC isn't implemented in QEMU.  Thus,
where there's disagreement I chose to use the Freescale abbreviations.

Signed-off-by: Scott Wood <scottwood@freescale.com>
[agraf: rebase on current state of the code]
Signed-off-by: Alexander Graf <agraf@suse.de>
2013-01-07 17:37:10 +01:00

1324 lines
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/*
* 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"
//#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 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)
#define BF_WIDTH(_bits_) \
(((_bits_) + (sizeof(uint32_t) * 8) - 1) / (sizeof(uint32_t) * 8))
static inline void set_bit(uint32_t *field, int bit)
{
field[bit >> 5] |= 1 << (bit & 0x1F);
}
static inline void reset_bit(uint32_t *field, int bit)
{
field[bit >> 5] &= ~(1 << (bit & 0x1F));
}
static inline int test_bit(uint32_t *field, int bit)
{
return (field[bit >> 5] & 1 << (bit & 0x1F)) != 0;
}
static int get_current_cpu(void)
{
if (!cpu_single_env) {
return -1;
}
return cpu_single_env->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 struct IRQQueue {
uint32_t queue[BF_WIDTH(MAX_IRQ)];
int next;
int priority;
int pending; /* nr of pending bits in queue */
} IRQQueue;
typedef struct IRQSource {
uint32_t ivpr; /* IRQ vector/priority register */
uint32_t idr; /* IRQ destination register */
int last_cpu;
int pending; /* TRUE if IRQ is pending */
} 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 {
uint32_t ctpr; /* CPU current task priority */
IRQQueue raised;
IRQQueue servicing;
qemu_irq *irqs;
} 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;
/* 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 void openpic_irq_raise(OpenPICState *opp, int n_CPU, IRQSource *src);
static inline void IRQ_setbit(IRQQueue *q, int n_IRQ)
{
q->pending++;
set_bit(q->queue, n_IRQ);
}
static inline void IRQ_resetbit(IRQQueue *q, int n_IRQ)
{
q->pending--;
reset_bit(q->queue, n_IRQ);
}
static inline int IRQ_testbit(IRQQueue *q, int n_IRQ)
{
return test_bit(q->queue, n_IRQ);
}
static void IRQ_check(OpenPICState *opp, IRQQueue *q)
{
int next, i;
int priority;
next = -1;
priority = -1;
if (!q->pending) {
/* IRQ bitmap is empty */
goto out;
}
for (i = 0; i < opp->max_irq; i++) {
if (IRQ_testbit(q, i)) {
DPRINTF("IRQ_check: irq %d set ivpr_pr=%d pr=%d\n",
i, IVPR_PRIORITY(opp->src[i].ivpr), priority);
if (IVPR_PRIORITY(opp->src[i].ivpr) > priority) {
next = i;
priority = IVPR_PRIORITY(opp->src[i].ivpr);
}
}
}
out:
q->next = next;
q->priority = priority;
}
static int IRQ_get_next(OpenPICState *opp, IRQQueue *q)
{
if (q->next == -1) {
/* XXX: optimize */
IRQ_check(opp, q);
}
return q->next;
}
static void IRQ_local_pipe(OpenPICState *opp, int n_CPU, int n_IRQ)
{
IRQDest *dst;
IRQSource *src;
int priority;
dst = &opp->dst[n_CPU];
src = &opp->src[n_IRQ];
priority = IVPR_PRIORITY(src->ivpr);
if (priority <= dst->ctpr) {
/* Too low priority */
DPRINTF("%s: IRQ %d has too low priority on CPU %d\n",
__func__, n_IRQ, n_CPU);
return;
}
if (IRQ_testbit(&dst->raised, n_IRQ)) {
/* Interrupt miss */
DPRINTF("%s: IRQ %d was missed on CPU %d\n",
__func__, n_IRQ, n_CPU);
return;
}
src->ivpr |= IVPR_ACTIVITY_MASK;
IRQ_setbit(&dst->raised, n_IRQ);
if (priority < dst->raised.priority) {
/* An higher priority IRQ is already raised */
DPRINTF("%s: IRQ %d is hidden by raised IRQ %d on CPU %d\n",
__func__, n_IRQ, dst->raised.next, n_CPU);
return;
}
IRQ_get_next(opp, &dst->raised);
if (IRQ_get_next(opp, &dst->servicing) != -1 &&
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);
/* Already servicing a higher priority IRQ */
return;
}
DPRINTF("Raise OpenPIC INT output cpu %d irq %d\n", n_CPU, n_IRQ);
openpic_irq_raise(opp, n_CPU, src);
}
/* update pic state because registers for n_IRQ have changed value */
static void openpic_update_irq(OpenPICState *opp, int n_IRQ)
{
IRQSource *src;
int i;
src = &opp->src[n_IRQ];
if (!src->pending) {
/* no irq pending */
DPRINTF("%s: IRQ %d is not pending\n", __func__, n_IRQ);
return;
}
if (src->ivpr & IVPR_MASK_MASK) {
/* Interrupt source is disabled */
DPRINTF("%s: IRQ %d is disabled\n", __func__, n_IRQ);
return;
}
if (IVPR_PRIORITY(src->ivpr) == 0) {
/* Priority set to zero */
DPRINTF("%s: IRQ %d has 0 priority\n", __func__, n_IRQ);
return;
}
if (src->ivpr & IVPR_ACTIVITY_MASK) {
/* IRQ already active */
DPRINTF("%s: IRQ %d is already active\n", __func__, n_IRQ);
return;
}
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);
} else if (!(src->ivpr & IVPR_MODE_MASK)) {
/* Directed delivery mode */
for (i = 0; i < opp->nb_cpus; i++) {
if (src->idr & (1 << i)) {
IRQ_local_pipe(opp, i, n_IRQ);
}
}
} else {
/* Distributed delivery mode */
for (i = src->last_cpu + 1; i != src->last_cpu; i++) {
if (i == opp->nb_cpus) {
i = 0;
}
if (src->idr & (1 << i)) {
IRQ_local_pipe(opp, i, n_IRQ);
src->last_cpu = i;
break;
}
}
}
}
static void openpic_set_irq(void *opaque, int n_IRQ, int level)
{
OpenPICState *opp = opaque;
IRQSource *src;
src = &opp->src[n_IRQ];
DPRINTF("openpic: set irq %d = %d ivpr=0x%08x\n",
n_IRQ, level, src->ivpr);
if (src->ivpr & IVPR_SENSE_MASK) {
/* level-sensitive irq */
src->pending = level;
if (!level) {
src->ivpr &= ~IVPR_ACTIVITY_MASK;
}
} else {
/* edge-sensitive irq */
if (level) {
src->pending = 1;
}
}
openpic_update_irq(opp, n_IRQ);
}
static void openpic_reset(DeviceState *d)
{
OpenPICState *opp = FROM_SYSBUS(typeof (*opp), sysbus_from_qdev(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;
}
/* 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)
{
uint32_t tmp;
tmp = val & (IDR_EP | IDR_CI);
tmp |= val & ((1ULL << MAX_CPU) - 1);
opp->src[n_IRQ].idr = tmp;
DPRINTF("Set IDR %d to 0x%08x\n", n_IRQ, opp->src[n_IRQ].idr);
}
static inline void write_IRQreg_ivpr(OpenPICState *opp, int n_IRQ, uint32_t val)
{
/* NOTE: not fully accurate for special IRQs, but simple and sufficient */
/* ACTIVITY bit is read-only */
opp->src[n_IRQ].ivpr = (opp->src[n_IRQ].ivpr & IVPR_ACTIVITY_MASK) |
(val & (IVPR_MASK_MASK | IVPR_PRIORITY_MASK | opp->vector_mask));
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_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 */
if (val & GCR_RESET) {
openpic_reset(&opp->busdev.qdev);
}
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;
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);
IRQ_resetbit(&dst->servicing, s_IRQ);
dst->servicing.next = -1;
/* 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);
openpic_irq_raise(opp, idx, src);
}
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_cpu_read_internal(void *opaque, hwaddr addr,
int idx)
{
OpenPICState *opp = opaque;
IRQSource *src;
IRQDest *dst;
uint32_t retval;
int n_IRQ;
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 */
DPRINTF("Lower OpenPIC INT output\n");
qemu_irq_lower(dst->irqs[OPENPIC_OUTPUT_INT]);
n_IRQ = IRQ_get_next(opp, &dst->raised);
DPRINTF("IACK: irq=%d\n", n_IRQ);
if (n_IRQ == -1) {
/* No more interrupt pending */
retval = opp->spve;
} else {
src = &opp->src[n_IRQ];
if (!(src->ivpr & IVPR_ACTIVITY_MASK) ||
!(IVPR_PRIORITY(src->ivpr) > dst->ctpr)) {
/* - Spurious level-sensitive IRQ
* - Priorities has been changed
* and the pending IRQ isn't allowed anymore
*/
src->ivpr &= ~IVPR_ACTIVITY_MASK;
retval = opp->spve;
} else {
/* IRQ enter servicing state */
IRQ_setbit(&dst->servicing, n_IRQ);
retval = IVPR_VECTOR(opp, src->ivpr);
}
IRQ_resetbit(&dst->raised, n_IRQ);
dst->raised.next = -1;
if (!(src->ivpr & IVPR_SENSE_MASK)) {
/* edge-sensitive IRQ */
src->ivpr &= ~IVPR_ACTIVITY_MASK;
src->pending = 0;
}
if ((n_IRQ >= opp->irq_ipi0) && (n_IRQ < (opp->irq_ipi0 + MAX_IPI))) {
src->idr &= ~(1 << idx);
if (src->idr && !(src->ivpr & IVPR_SENSE_MASK)) {
/* trigger on CPUs that didn't know about it yet */
openpic_set_irq(opp, n_IRQ, 1);
openpic_set_irq(opp, n_IRQ, 0);
/* if all CPUs knew about it, set active bit again */
src->ivpr |= IVPR_ACTIVITY_MASK;
}
}
}
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 < BF_WIDTH(MAX_IRQ); i++)
qemu_put_be32s(f, &q->queue[i]);
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);
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);
}
qemu_put_be32s(f, &opp->nb_cpus);
for (i = 0; i < opp->nb_cpus; i++) {
qemu_put_be32s(f, &opp->dst[i].ctpr);
openpic_save_IRQ_queue(f, &opp->dst[i].raised);
openpic_save_IRQ_queue(f, &opp->dst[i].servicing);
}
for (i = 0; i < MAX_TMR; i++) {
qemu_put_be32s(f, &opp->timers[i].tccr);
qemu_put_be32s(f, &opp->timers[i].tbcr);
}
}
static void openpic_load_IRQ_queue(QEMUFile* f, IRQQueue *q)
{
unsigned int i;
for (i = 0; i < BF_WIDTH(MAX_IRQ); i++)
qemu_get_be32s(f, &q->queue[i]);
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);
for (i = 0; i < opp->max_irq; i++) {
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);
}
qemu_get_be32s(f, &opp->nb_cpus);
for (i = 0; i < opp->nb_cpus; i++) {
qemu_get_be32s(f, &opp->dst[i].ctpr);
openpic_load_IRQ_queue(f, &opp->dst[i].raised);
openpic_load_IRQ_queue(f, &opp->dst[i].servicing);
}
for (i = 0; i < MAX_TMR; i++) {
qemu_get_be32s(f, &opp->timers[i].tccr);
qemu_get_be32s(f, &opp->timers[i].tbcr);
}
return 0;
}
static void openpic_irq_raise(OpenPICState *opp, int n_CPU, IRQSource *src)
{
int n_ci = IDR_CI0_SHIFT - n_CPU;
if ((opp->flags & OPENPIC_FLAG_IDR_CRIT) && (src->idr & (1 << n_ci))) {
qemu_irq_raise(opp->dst[n_CPU].irqs[OPENPIC_OUTPUT_CINT]);
} else {
qemu_irq_raise(opp->dst[n_CPU].irqs[OPENPIC_OUTPUT_INT]);
}
}
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;
msi_supported = true;
list = list_be;
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;
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 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)
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