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qemu/hw/openpic.c

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/*
* OpenPIC emulation
*
* Copyright (c) 2004 Jocelyn Mayer
*
* 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 compagnion chip developper'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 "vl.h"
//#define DEBUG_OPENPIC
#ifdef DEBUG_OPENPIC
#define DPRINTF(fmt, args...) do { printf(fmt , ##args); } while (0)
#else
#define DPRINTF(fmt, args...) do { } while (0)
#endif
#define ERROR(fmr, args...) do { printf("ERROR: " fmr , ##args); } while (0)
#define USE_MPCxxx /* Intel model is broken, for now */
#if defined (USE_INTEL_GW80314)
/* Intel GW80314 I/O Companion chip */
#define MAX_CPU 4
#define MAX_IRQ 32
#define MAX_DBL 4
#define MAX_MBX 4
#define MAX_TMR 4
#define VECTOR_BITS 8
#define MAX_IPI 0
#define VID (0x00000000)
#define OPENPIC_LITTLE_ENDIAN 1
#define OPENPIC_BIG_ENDIAN 0
#elif defined(USE_MPCxxx)
#define MAX_CPU 2
#define MAX_IRQ 64
#define EXT_IRQ 48
#define MAX_DBL 0
#define MAX_MBX 0
#define MAX_TMR 4
#define VECTOR_BITS 8
#define MAX_IPI 4
#define VID 0x03 /* MPIC version ID */
#define VENI 0x00000000 /* Vendor ID */
enum {
IRQ_IPVP = 0,
IRQ_IDE,
};
#define OPENPIC_LITTLE_ENDIAN 1
#define OPENPIC_BIG_ENDIAN 0
#else
#error "Please select which OpenPic implementation is to be emulated"
#endif
#if (OPENPIC_BIG_ENDIAN && !TARGET_WORDS_BIGENDIAN) || \
(OPENPIC_LITTLE_ENDIAN && TARGET_WORDS_BIGENDIAN)
#define OPENPIC_SWAP
#endif
/* Interrupt definitions */
#define IRQ_FE (EXT_IRQ) /* Internal functional IRQ */
#define IRQ_ERR (EXT_IRQ + 1) /* Error IRQ */
#define IRQ_TIM0 (EXT_IRQ + 2) /* First timer IRQ */
#if MAX_IPI > 0
#define IRQ_IPI0 (IRQ_TIM0 + MAX_TMR) /* First IPI IRQ */
#define IRQ_DBL0 (IRQ_IPI0 + (MAX_CPU * MAX_IPI)) /* First doorbell IRQ */
#else
#define IRQ_DBL0 (IRQ_TIM0 + MAX_TMR) /* First doorbell IRQ */
#define IRQ_MBX0 (IRQ_DBL0 + MAX_DBL) /* First mailbox IRQ */
#endif
#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;
}
enum {
IRQ_EXTERNAL = 0x01,
IRQ_INTERNAL = 0x02,
IRQ_TIMER = 0x04,
IRQ_SPECIAL = 0x08,
} IRQ_src_type;
typedef struct IRQ_queue_t {
uint32_t queue[BF_WIDTH(MAX_IRQ)];
int next;
int priority;
} IRQ_queue_t;
typedef struct IRQ_src_t {
uint32_t ipvp; /* IRQ vector/priority register */
uint32_t ide; /* IRQ destination register */
int type;
int last_cpu;
int pending; /* TRUE if IRQ is pending */
} IRQ_src_t;
enum IPVP_bits {
IPVP_MASK = 31,
IPVP_ACTIVITY = 30,
IPVP_MODE = 29,
IPVP_POLARITY = 23,
IPVP_SENSE = 22,
};
#define IPVP_PRIORITY_MASK (0x1F << 16)
#define IPVP_PRIORITY(_ipvpr_) ((int)(((_ipvpr_) & IPVP_PRIORITY_MASK) >> 16))
#define IPVP_VECTOR_MASK ((1 << VECTOR_BITS) - 1)
#define IPVP_VECTOR(_ipvpr_) ((_ipvpr_) & IPVP_VECTOR_MASK)
typedef struct IRQ_dst_t {
uint32_t pctp; /* CPU current task priority */
uint32_t pcsr; /* CPU sensitivity register */
IRQ_queue_t raised;
IRQ_queue_t servicing;
qemu_irq *irqs;
} IRQ_dst_t;
typedef struct openpic_t {
PCIDevice pci_dev;
int mem_index;
/* Global registers */
uint32_t frep; /* Feature reporting register */
uint32_t glbc; /* Global configuration register */
uint32_t micr; /* MPIC interrupt configuration register */
uint32_t veni; /* Vendor identification register */
uint32_t pint; /* Processor initialization register */
uint32_t spve; /* Spurious vector register */
uint32_t tifr; /* Timer frequency reporting register */
/* Source registers */
IRQ_src_t src[MAX_IRQ];
/* Local registers per output pin */
IRQ_dst_t dst[MAX_CPU];
int nb_cpus;
/* Timer registers */
struct {
uint32_t ticc; /* Global timer current count register */
uint32_t tibc; /* Global timer base count register */
} timers[MAX_TMR];
#if MAX_DBL > 0
/* Doorbell registers */
uint32_t dar; /* Doorbell activate register */
struct {
uint32_t dmr; /* Doorbell messaging register */
} doorbells[MAX_DBL];
#endif
#if MAX_MBX > 0
/* Mailbox registers */
struct {
uint32_t mbr; /* Mailbox register */
} mailboxes[MAX_MAILBOXES];
#endif
/* IRQ out is used when in bypass mode (not implemented) */
qemu_irq irq_out;
} openpic_t;
static inline void IRQ_setbit (IRQ_queue_t *q, int n_IRQ)
{
set_bit(q->queue, n_IRQ);
}
static inline void IRQ_resetbit (IRQ_queue_t *q, int n_IRQ)
{
reset_bit(q->queue, n_IRQ);
}
static inline int IRQ_testbit (IRQ_queue_t *q, int n_IRQ)
{
return test_bit(q->queue, n_IRQ);
}
static void IRQ_check (openpic_t *opp, IRQ_queue_t *q)
{
int next, i;
int priority;
next = -1;
priority = -1;
for (i = 0; i < MAX_IRQ; i++) {
if (IRQ_testbit(q, i)) {
DPRINTF("IRQ_check: irq %d set ipvp_pr=%d pr=%d\n",
i, IPVP_PRIORITY(opp->src[i].ipvp), priority);
if (IPVP_PRIORITY(opp->src[i].ipvp) > priority) {
next = i;
priority = IPVP_PRIORITY(opp->src[i].ipvp);
}
}
}
q->next = next;
q->priority = priority;
}
static int IRQ_get_next (openpic_t *opp, IRQ_queue_t *q)
{
if (q->next == -1) {
/* XXX: optimize */
IRQ_check(opp, q);
}
return q->next;
}
static void IRQ_local_pipe (openpic_t *opp, int n_CPU, int n_IRQ)
{
IRQ_dst_t *dst;
IRQ_src_t *src;
int priority;
dst = &opp->dst[n_CPU];
src = &opp->src[n_IRQ];
priority = IPVP_PRIORITY(src->ipvp);
if (priority <= dst->pctp) {
/* 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;
}
set_bit(&src->ipvp, IPVP_ACTIVITY);
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);
qemu_irq_raise(dst->irqs[OPENPIC_OUTPUT_INT]);
}
/* update pic state because registers for n_IRQ have changed value */
static void openpic_update_irq(openpic_t *opp, int n_IRQ)
{
IRQ_src_t *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 (test_bit(&src->ipvp, IPVP_MASK)) {
/* Interrupt source is disabled */
DPRINTF("%s: IRQ %d is disabled\n", __func__, n_IRQ);
return;
}
if (IPVP_PRIORITY(src->ipvp) == 0) {
/* Priority set to zero */
DPRINTF("%s: IRQ %d has 0 priority\n", __func__, n_IRQ);
return;
}
if (test_bit(&src->ipvp, IPVP_ACTIVITY)) {
/* IRQ already active */
DPRINTF("%s: IRQ %d is already active\n", __func__, n_IRQ);
return;
}
if (src->ide == 0x00000000) {
/* No target */
DPRINTF("%s: IRQ %d has no target\n", __func__, n_IRQ);
return;
}
if (src->ide == (1 << src->last_cpu)) {
/* Only one CPU is allowed to receive this IRQ */
IRQ_local_pipe(opp, src->last_cpu, n_IRQ);
} else if (!test_bit(&src->ipvp, IPVP_MODE)) {
/* Directed delivery mode */
for (i = 0; i < opp->nb_cpus; i++) {
if (test_bit(&src->ide, 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 (test_bit(&src->ide, 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)
{
openpic_t *opp = opaque;
IRQ_src_t *src;
src = &opp->src[n_IRQ];
DPRINTF("openpic: set irq %d = %d ipvp=%08x\n",
n_IRQ, level, src->ipvp);
if (test_bit(&src->ipvp, IPVP_SENSE)) {
/* level-sensitive irq */
src->pending = level;
if (!level)
reset_bit(&src->ipvp, IPVP_ACTIVITY);
} else {
/* edge-sensitive irq */
if (level)
src->pending = 1;
}
openpic_update_irq(opp, n_IRQ);
}
static void openpic_reset (openpic_t *opp)
{
int i;
opp->glbc = 0x80000000;
/* Initialise controller registers */
opp->frep = ((EXT_IRQ - 1) << 16) | ((MAX_CPU - 1) << 8) | VID;
opp->veni = VENI;
opp->pint = 0x00000000;
opp->spve = 0x000000FF;
opp->tifr = 0x003F7A00;
/* ? */
opp->micr = 0x00000000;
/* Initialise IRQ sources */
for (i = 0; i < MAX_IRQ; i++) {
opp->src[i].ipvp = 0xA0000000;
opp->src[i].ide = 0x00000000;
}
/* Initialise IRQ destinations */
for (i = 0; i < MAX_CPU; i++) {
opp->dst[i].pctp = 0x0000000F;
opp->dst[i].pcsr = 0x00000000;
memset(&opp->dst[i].raised, 0, sizeof(IRQ_queue_t));
memset(&opp->dst[i].servicing, 0, sizeof(IRQ_queue_t));
}
/* Initialise timers */
for (i = 0; i < MAX_TMR; i++) {
opp->timers[i].ticc = 0x00000000;
opp->timers[i].tibc = 0x80000000;
}
/* Initialise doorbells */
#if MAX_DBL > 0
opp->dar = 0x00000000;
for (i = 0; i < MAX_DBL; i++) {
opp->doorbells[i].dmr = 0x00000000;
}
#endif
/* Initialise mailboxes */
#if MAX_MBX > 0
for (i = 0; i < MAX_MBX; i++) { /* ? */
opp->mailboxes[i].mbr = 0x00000000;
}
#endif
/* Go out of RESET state */
opp->glbc = 0x00000000;
}
static inline uint32_t read_IRQreg (openpic_t *opp, int n_IRQ, uint32_t reg)
{
uint32_t retval;
switch (reg) {
case IRQ_IPVP:
retval = opp->src[n_IRQ].ipvp;
break;
case IRQ_IDE:
retval = opp->src[n_IRQ].ide;
break;
}
return retval;
}
static inline void write_IRQreg (openpic_t *opp, int n_IRQ,
uint32_t reg, uint32_t val)
{
uint32_t tmp;
switch (reg) {
case IRQ_IPVP:
/* NOTE: not fully accurate for special IRQs, but simple and
sufficient */
/* ACTIVITY bit is read-only */
opp->src[n_IRQ].ipvp =
(opp->src[n_IRQ].ipvp & 0x40000000) |
(val & 0x800F00FF);
openpic_update_irq(opp, n_IRQ);
DPRINTF("Set IPVP %d to 0x%08x -> 0x%08x\n",
n_IRQ, val, opp->src[n_IRQ].ipvp);
break;
case IRQ_IDE:
tmp = val & 0xC0000000;
tmp |= val & ((1 << MAX_CPU) - 1);
opp->src[n_IRQ].ide = tmp;
DPRINTF("Set IDE %d to 0x%08x\n", n_IRQ, opp->src[n_IRQ].ide);
break;
}
}
#if 0 // Code provision for Intel model
#if MAX_DBL > 0
static uint32_t read_doorbell_register (openpic_t *opp,
int n_dbl, uint32_t offset)
{
uint32_t retval;
switch (offset) {
case DBL_IPVP_OFFSET:
retval = read_IRQreg(opp, IRQ_DBL0 + n_dbl, IRQ_IPVP);
break;
case DBL_IDE_OFFSET:
retval = read_IRQreg(opp, IRQ_DBL0 + n_dbl, IRQ_IDE);
break;
case DBL_DMR_OFFSET:
retval = opp->doorbells[n_dbl].dmr;
break;
}
return retval;
}
static void write_doorbell_register (penpic_t *opp, int n_dbl,
uint32_t offset, uint32_t value)
{
switch (offset) {
case DBL_IVPR_OFFSET:
write_IRQreg(opp, IRQ_DBL0 + n_dbl, IRQ_IPVP, value);
break;
case DBL_IDE_OFFSET:
write_IRQreg(opp, IRQ_DBL0 + n_dbl, IRQ_IDE, value);
break;
case DBL_DMR_OFFSET:
opp->doorbells[n_dbl].dmr = value;
break;
}
}
#endif
#if MAX_MBX > 0
static uint32_t read_mailbox_register (openpic_t *opp,
int n_mbx, uint32_t offset)
{
uint32_t retval;
switch (offset) {
case MBX_MBR_OFFSET:
retval = opp->mailboxes[n_mbx].mbr;
break;
case MBX_IVPR_OFFSET:
retval = read_IRQreg(opp, IRQ_MBX0 + n_mbx, IRQ_IPVP);
break;
case MBX_DMR_OFFSET:
retval = read_IRQreg(opp, IRQ_MBX0 + n_mbx, IRQ_IDE);
break;
}
return retval;
}
static void write_mailbox_register (openpic_t *opp, int n_mbx,
uint32_t address, uint32_t value)
{
switch (offset) {
case MBX_MBR_OFFSET:
opp->mailboxes[n_mbx].mbr = value;
break;
case MBX_IVPR_OFFSET:
write_IRQreg(opp, IRQ_MBX0 + n_mbx, IRQ_IPVP, value);
break;
case MBX_DMR_OFFSET:
write_IRQreg(opp, IRQ_MBX0 + n_mbx, IRQ_IDE, value);
break;
}
}
#endif
#endif /* 0 : Code provision for Intel model */
static void openpic_gbl_write (void *opaque, uint32_t addr, uint32_t val)
{
openpic_t *opp = opaque;
IRQ_dst_t *dst;
int idx;
DPRINTF("%s: addr %08x <= %08x\n", __func__, addr, val);
if (addr & 0xF)
return;
#if defined OPENPIC_SWAP
val = bswap32(val);
#endif
addr &= 0xFF;
switch (addr) {
case 0x00: /* FREP */
break;
case 0x20: /* GLBC */
if (val & 0x80000000)
openpic_reset(opp);
opp->glbc = val & ~0x80000000;
break;
case 0x80: /* VENI */
break;
case 0x90: /* PINT */
for (idx = 0; idx < opp->nb_cpus; idx++) {
if ((val & (1 << idx)) && !(opp->pint & (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->pint & (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->pint = val;
break;
#if MAX_IPI > 0
case 0xA0: /* IPI_IPVP */
case 0xB0:
case 0xC0:
case 0xD0:
{
int idx;
idx = (addr - 0xA0) >> 4;
write_IRQreg(opp, IRQ_IPI0 + idx, IRQ_IPVP, val);
}
break;
#endif
case 0xE0: /* SPVE */
opp->spve = val & 0x000000FF;
break;
case 0xF0: /* TIFR */
opp->tifr = val;
break;
default:
break;
}
}
static uint32_t openpic_gbl_read (void *opaque, uint32_t addr)
{
openpic_t *opp = opaque;
uint32_t retval;
DPRINTF("%s: addr %08x\n", __func__, addr);
retval = 0xFFFFFFFF;
if (addr & 0xF)
return retval;
addr &= 0xFF;
switch (addr) {
case 0x00: /* FREP */
retval = opp->frep;
break;
case 0x20: /* GLBC */
retval = opp->glbc;
break;
case 0x80: /* VENI */
retval = opp->veni;
break;
case 0x90: /* PINT */
retval = 0x00000000;
break;
#if MAX_IPI > 0
case 0xA0: /* IPI_IPVP */
case 0xB0:
case 0xC0:
case 0xD0:
{
int idx;
idx = (addr - 0xA0) >> 4;
retval = read_IRQreg(opp, IRQ_IPI0 + idx, IRQ_IPVP);
}
break;
#endif
case 0xE0: /* SPVE */
retval = opp->spve;
break;
case 0xF0: /* TIFR */
retval = opp->tifr;
break;
default:
break;
}
DPRINTF("%s: => %08x\n", __func__, retval);
#if defined OPENPIC_SWAP
retval = bswap32(retval);
#endif
return retval;
}
static void openpic_timer_write (void *opaque, uint32_t addr, uint32_t val)
{
openpic_t *opp = opaque;
int idx;
DPRINTF("%s: addr %08x <= %08x\n", __func__, addr, val);
if (addr & 0xF)
return;
#if defined OPENPIC_SWAP
val = bswap32(val);
#endif
addr -= 0x1100;
addr &= 0xFFFF;
idx = (addr & 0xFFF0) >> 6;
addr = addr & 0x30;
switch (addr) {
case 0x00: /* TICC */
break;
case 0x10: /* TIBC */
if ((opp->timers[idx].ticc & 0x80000000) != 0 &&
(val & 0x80000000) == 0 &&
(opp->timers[idx].tibc & 0x80000000) != 0)
opp->timers[idx].ticc &= ~0x80000000;
opp->timers[idx].tibc = val;
break;
case 0x20: /* TIVP */
write_IRQreg(opp, IRQ_TIM0 + idx, IRQ_IPVP, val);
break;
case 0x30: /* TIDE */
write_IRQreg(opp, IRQ_TIM0 + idx, IRQ_IDE, val);
break;
}
}
static uint32_t openpic_timer_read (void *opaque, uint32_t addr)
{
openpic_t *opp = opaque;
uint32_t retval;
int idx;
DPRINTF("%s: addr %08x\n", __func__, addr);
retval = 0xFFFFFFFF;
if (addr & 0xF)
return retval;
addr -= 0x1100;
addr &= 0xFFFF;
idx = (addr & 0xFFF0) >> 6;
addr = addr & 0x30;
switch (addr) {
case 0x00: /* TICC */
retval = opp->timers[idx].ticc;
break;
case 0x10: /* TIBC */
retval = opp->timers[idx].tibc;
break;
case 0x20: /* TIPV */
retval = read_IRQreg(opp, IRQ_TIM0 + idx, IRQ_IPVP);
break;
case 0x30: /* TIDE */
retval = read_IRQreg(opp, IRQ_TIM0 + idx, IRQ_IDE);
break;
}
DPRINTF("%s: => %08x\n", __func__, retval);
#if defined OPENPIC_SWAP
retval = bswap32(retval);
#endif
return retval;
}
static void openpic_src_write (void *opaque, uint32_t addr, uint32_t val)
{
openpic_t *opp = opaque;
int idx;
DPRINTF("%s: addr %08x <= %08x\n", __func__, addr, val);
if (addr & 0xF)
return;
#if defined OPENPIC_SWAP
val = tswap32(val);
#endif
addr = addr & 0xFFF0;
idx = addr >> 5;
if (addr & 0x10) {
/* EXDE / IFEDE / IEEDE */
write_IRQreg(opp, idx, IRQ_IDE, val);
} else {
/* EXVP / IFEVP / IEEVP */
write_IRQreg(opp, idx, IRQ_IPVP, val);
}
}
static uint32_t openpic_src_read (void *opaque, uint32_t addr)
{
openpic_t *opp = opaque;
uint32_t retval;
int idx;
DPRINTF("%s: addr %08x\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(opp, idx, IRQ_IDE);
} else {
/* EXVP / IFEVP / IEEVP */
retval = read_IRQreg(opp, idx, IRQ_IPVP);
}
DPRINTF("%s: => %08x\n", __func__, retval);
#if defined OPENPIC_SWAP
retval = tswap32(retval);
#endif
return retval;
}
static void openpic_cpu_write (void *opaque, uint32_t addr, uint32_t val)
{
openpic_t *opp = opaque;
IRQ_src_t *src;
IRQ_dst_t *dst;
int idx, s_IRQ, n_IRQ;
DPRINTF("%s: addr %08x <= %08x\n", __func__, addr, val);
if (addr & 0xF)
return;
#if defined OPENPIC_SWAP
val = bswap32(val);
#endif
addr &= 0x1FFF0;
idx = addr / 0x1000;
dst = &opp->dst[idx];
addr &= 0xFF0;
switch (addr) {
#if MAX_IPI > 0
case 0x40: /* PIPD */
case 0x50:
case 0x60:
case 0x70:
idx = (addr - 0x40) >> 4;
write_IRQreg(opp, IRQ_IPI0 + idx, IRQ_IDE, val);
openpic_set_irq(opp, IRQ_IPI0 + idx, 1);
openpic_set_irq(opp, IRQ_IPI0 + idx, 0);
break;
#endif
case 0x80: /* PCTP */
dst->pctp = val & 0x0000000F;
break;
case 0x90: /* WHOAMI */
/* Read-only register */
break;
case 0xA0: /* PIAC */
/* Read-only register */
break;
case 0xB0: /* PEOI */
DPRINTF("PEOI\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 ||
IPVP_PRIORITY(src->ipvp) > dst->servicing.priority)) {
DPRINTF("Raise OpenPIC INT output cpu %d irq %d\n",
idx, n_IRQ);
qemu_irq_raise(dst->irqs[OPENPIC_OUTPUT_INT]);
}
break;
default:
break;
}
}
static uint32_t openpic_cpu_read (void *opaque, uint32_t addr)
{
openpic_t *opp = opaque;
IRQ_src_t *src;
IRQ_dst_t *dst;
uint32_t retval;
int idx, n_IRQ;
DPRINTF("%s: addr %08x\n", __func__, addr);
retval = 0xFFFFFFFF;
if (addr & 0xF)
return retval;
addr &= 0x1FFF0;
idx = addr / 0x1000;
dst = &opp->dst[idx];
addr &= 0xFF0;
switch (addr) {
case 0x80: /* PCTP */
retval = dst->pctp;
break;
case 0x90: /* WHOAMI */
retval = idx;
break;
case 0xA0: /* PIAC */
DPRINTF("Lower OpenPIC INT output\n");
qemu_irq_lower(dst->irqs[OPENPIC_OUTPUT_INT]);
n_IRQ = IRQ_get_next(opp, &dst->raised);
DPRINTF("PIAC: irq=%d\n", n_IRQ);
if (n_IRQ == -1) {
/* No more interrupt pending */
retval = IPVP_VECTOR(opp->spve);
} else {
src = &opp->src[n_IRQ];
if (!test_bit(&src->ipvp, IPVP_ACTIVITY) ||
!(IPVP_PRIORITY(src->ipvp) > dst->pctp)) {
/* - Spurious level-sensitive IRQ
* - Priorities has been changed
* and the pending IRQ isn't allowed anymore
*/
reset_bit(&src->ipvp, IPVP_ACTIVITY);
retval = IPVP_VECTOR(opp->spve);
} else {
/* IRQ enter servicing state */
IRQ_setbit(&dst->servicing, n_IRQ);
retval = IPVP_VECTOR(src->ipvp);
}
IRQ_resetbit(&dst->raised, n_IRQ);
dst->raised.next = -1;
if (!test_bit(&src->ipvp, IPVP_SENSE)) {
/* edge-sensitive IRQ */
reset_bit(&src->ipvp, IPVP_ACTIVITY);
src->pending = 0;
}
}
break;
case 0xB0: /* PEOI */
retval = 0;
break;
#if MAX_IPI > 0
case 0x40: /* IDE */
case 0x50:
idx = (addr - 0x40) >> 4;
retval = read_IRQreg(opp, IRQ_IPI0 + idx, IRQ_IDE);
break;
#endif
default:
break;
}
DPRINTF("%s: => %08x\n", __func__, retval);
#if defined OPENPIC_SWAP
retval= bswap32(retval);
#endif
return retval;
}
static void openpic_buggy_write (void *opaque,
target_phys_addr_t addr, uint32_t val)
{
printf("Invalid OPENPIC write access !\n");
}
static uint32_t openpic_buggy_read (void *opaque, target_phys_addr_t addr)
{
printf("Invalid OPENPIC read access !\n");
return -1;
}
static void openpic_writel (void *opaque,
target_phys_addr_t addr, uint32_t val)
{
openpic_t *opp = opaque;
addr &= 0x3FFFF;
DPRINTF("%s: offset %08x val: %08x\n", __func__, (int)addr, val);
if (addr < 0x1100) {
/* Global registers */
openpic_gbl_write(opp, addr, val);
} else if (addr < 0x10000) {
/* Timers registers */
openpic_timer_write(opp, addr, val);
} else if (addr < 0x20000) {
/* Source registers */
openpic_src_write(opp, addr, val);
} else {
/* CPU registers */
openpic_cpu_write(opp, addr, val);
}
}
static uint32_t openpic_readl (void *opaque,target_phys_addr_t addr)
{
openpic_t *opp = opaque;
uint32_t retval;
addr &= 0x3FFFF;
DPRINTF("%s: offset %08x\n", __func__, (int)addr);
if (addr < 0x1100) {
/* Global registers */
retval = openpic_gbl_read(opp, addr);
} else if (addr < 0x10000) {
/* Timers registers */
retval = openpic_timer_read(opp, addr);
} else if (addr < 0x20000) {
/* Source registers */
retval = openpic_src_read(opp, addr);
} else {
/* CPU registers */
retval = openpic_cpu_read(opp, addr);
}
return retval;
}
static CPUWriteMemoryFunc *openpic_write[] = {
&openpic_buggy_write,
&openpic_buggy_write,
&openpic_writel,
};
static CPUReadMemoryFunc *openpic_read[] = {
&openpic_buggy_read,
&openpic_buggy_read,
&openpic_readl,
};
static void openpic_map(PCIDevice *pci_dev, int region_num,
uint32_t addr, uint32_t size, int type)
{
openpic_t *opp;
DPRINTF("Map OpenPIC\n");
opp = (openpic_t *)pci_dev;
/* Global registers */
DPRINTF("Register OPENPIC gbl %08x => %08x\n",
addr + 0x1000, addr + 0x1000 + 0x100);
/* Timer registers */
DPRINTF("Register OPENPIC timer %08x => %08x\n",
addr + 0x1100, addr + 0x1100 + 0x40 * MAX_TMR);
/* Interrupt source registers */
DPRINTF("Register OPENPIC src %08x => %08x\n",
addr + 0x10000, addr + 0x10000 + 0x20 * (EXT_IRQ + 2));
/* Per CPU registers */
DPRINTF("Register OPENPIC dst %08x => %08x\n",
addr + 0x20000, addr + 0x20000 + 0x1000 * MAX_CPU);
cpu_register_physical_memory(addr, 0x40000, opp->mem_index);
#if 0 // Don't implement ISU for now
opp_io_memory = cpu_register_io_memory(0, openpic_src_read,
openpic_src_write);
cpu_register_physical_memory(isu_base, 0x20 * (EXT_IRQ + 2),
opp_io_memory);
#endif
}
qemu_irq *openpic_init (PCIBus *bus, int *pmem_index, int nb_cpus,
qemu_irq **irqs, qemu_irq irq_out)
{
openpic_t *opp;
uint8_t *pci_conf;
int i, m;
/* XXX: for now, only one CPU is supported */
if (nb_cpus != 1)
return NULL;
if (bus) {
opp = (openpic_t *)pci_register_device(bus, "OpenPIC", sizeof(openpic_t),
-1, NULL, NULL);
if (opp == NULL)
return NULL;
pci_conf = opp->pci_dev.config;
pci_conf[0x00] = 0x14; // IBM MPIC2
pci_conf[0x01] = 0x10;
pci_conf[0x02] = 0xFF;
pci_conf[0x03] = 0xFF;
pci_conf[0x0a] = 0x80; // PIC
pci_conf[0x0b] = 0x08;
pci_conf[0x0e] = 0x00; // header_type
pci_conf[0x3d] = 0x00; // no interrupt pin
/* Register I/O spaces */
pci_register_io_region((PCIDevice *)opp, 0, 0x40000,
PCI_ADDRESS_SPACE_MEM, &openpic_map);
} else {
opp = qemu_mallocz(sizeof(openpic_t));
}
opp->mem_index = cpu_register_io_memory(0, openpic_read,
openpic_write, opp);
// isu_base &= 0xFFFC0000;
opp->nb_cpus = nb_cpus;
/* Set IRQ types */
for (i = 0; i < EXT_IRQ; i++) {
opp->src[i].type = IRQ_EXTERNAL;
}
for (; i < IRQ_TIM0; i++) {
opp->src[i].type = IRQ_SPECIAL;
}
#if MAX_IPI > 0
m = IRQ_IPI0;
#else
m = IRQ_DBL0;
#endif
for (; i < m; i++) {
opp->src[i].type = IRQ_TIMER;
}
for (; i < MAX_IRQ; i++) {
opp->src[i].type = IRQ_INTERNAL;
}
for (i = 0; i < nb_cpus; i++)
opp->dst[i].irqs = irqs[i];
opp->irq_out = irq_out;
openpic_reset(opp);
if (pmem_index)
*pmem_index = opp->mem_index;
return qemu_allocate_irqs(openpic_set_irq, opp, MAX_IRQ);
}
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