c227f0995e
In the very least, a change like this requires discussion on the list.
The naming convention is goofy and it causes a massive merge problem. Something
like this _must_ be presented on the list first so people can provide input
and cope with it.
This reverts commit 99a0949b72.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
482 lines
12 KiB
C
482 lines
12 KiB
C
/*
|
|
* SuperH interrupt controller module
|
|
*
|
|
* Copyright (c) 2007 Magnus Damm
|
|
* Based on sh_timer.c and arm_timer.c by Paul Brook
|
|
* Copyright (c) 2005-2006 CodeSourcery.
|
|
*
|
|
* This code is licenced under the GPL.
|
|
*/
|
|
|
|
#include "sh_intc.h"
|
|
#include "hw.h"
|
|
#include "sh.h"
|
|
|
|
//#define DEBUG_INTC
|
|
//#define DEBUG_INTC_SOURCES
|
|
|
|
#define INTC_A7(x) ((x) & 0x1fffffff)
|
|
|
|
void sh_intc_toggle_source(struct intc_source *source,
|
|
int enable_adj, int assert_adj)
|
|
{
|
|
int enable_changed = 0;
|
|
int pending_changed = 0;
|
|
int old_pending;
|
|
|
|
if ((source->enable_count == source->enable_max) && (enable_adj == -1))
|
|
enable_changed = -1;
|
|
|
|
source->enable_count += enable_adj;
|
|
|
|
if (source->enable_count == source->enable_max)
|
|
enable_changed = 1;
|
|
|
|
source->asserted += assert_adj;
|
|
|
|
old_pending = source->pending;
|
|
source->pending = source->asserted &&
|
|
(source->enable_count == source->enable_max);
|
|
|
|
if (old_pending != source->pending)
|
|
pending_changed = 1;
|
|
|
|
if (pending_changed) {
|
|
if (source->pending) {
|
|
source->parent->pending++;
|
|
if (source->parent->pending == 1)
|
|
cpu_interrupt(first_cpu, CPU_INTERRUPT_HARD);
|
|
}
|
|
else {
|
|
source->parent->pending--;
|
|
if (source->parent->pending == 0)
|
|
cpu_reset_interrupt(first_cpu, CPU_INTERRUPT_HARD);
|
|
}
|
|
}
|
|
|
|
if (enable_changed || assert_adj || pending_changed) {
|
|
#ifdef DEBUG_INTC_SOURCES
|
|
printf("sh_intc: (%d/%d/%d/%d) interrupt source 0x%x %s%s%s\n",
|
|
source->parent->pending,
|
|
source->asserted,
|
|
source->enable_count,
|
|
source->enable_max,
|
|
source->vect,
|
|
source->asserted ? "asserted " :
|
|
assert_adj ? "deasserted" : "",
|
|
enable_changed == 1 ? "enabled " :
|
|
enable_changed == -1 ? "disabled " : "",
|
|
source->pending ? "pending" : "");
|
|
#endif
|
|
}
|
|
}
|
|
|
|
static void sh_intc_set_irq (void *opaque, int n, int level)
|
|
{
|
|
struct intc_desc *desc = opaque;
|
|
struct intc_source *source = &(desc->sources[n]);
|
|
|
|
if (level && !source->asserted)
|
|
sh_intc_toggle_source(source, 0, 1);
|
|
else if (!level && source->asserted)
|
|
sh_intc_toggle_source(source, 0, -1);
|
|
}
|
|
|
|
int sh_intc_get_pending_vector(struct intc_desc *desc, int imask)
|
|
{
|
|
unsigned int i;
|
|
|
|
/* slow: use a linked lists of pending sources instead */
|
|
/* wrong: take interrupt priority into account (one list per priority) */
|
|
|
|
if (imask == 0x0f) {
|
|
return -1; /* FIXME, update code to include priority per source */
|
|
}
|
|
|
|
for (i = 0; i < desc->nr_sources; i++) {
|
|
struct intc_source *source = desc->sources + i;
|
|
|
|
if (source->pending) {
|
|
#ifdef DEBUG_INTC_SOURCES
|
|
printf("sh_intc: (%d) returning interrupt source 0x%x\n",
|
|
desc->pending, source->vect);
|
|
#endif
|
|
return source->vect;
|
|
}
|
|
}
|
|
|
|
assert(0);
|
|
}
|
|
|
|
#define INTC_MODE_NONE 0
|
|
#define INTC_MODE_DUAL_SET 1
|
|
#define INTC_MODE_DUAL_CLR 2
|
|
#define INTC_MODE_ENABLE_REG 3
|
|
#define INTC_MODE_MASK_REG 4
|
|
#define INTC_MODE_IS_PRIO 8
|
|
|
|
static unsigned int sh_intc_mode(unsigned long address,
|
|
unsigned long set_reg, unsigned long clr_reg)
|
|
{
|
|
if ((address != INTC_A7(set_reg)) &&
|
|
(address != INTC_A7(clr_reg)))
|
|
return INTC_MODE_NONE;
|
|
|
|
if (set_reg && clr_reg) {
|
|
if (address == INTC_A7(set_reg))
|
|
return INTC_MODE_DUAL_SET;
|
|
else
|
|
return INTC_MODE_DUAL_CLR;
|
|
}
|
|
|
|
if (set_reg)
|
|
return INTC_MODE_ENABLE_REG;
|
|
else
|
|
return INTC_MODE_MASK_REG;
|
|
}
|
|
|
|
static void sh_intc_locate(struct intc_desc *desc,
|
|
unsigned long address,
|
|
unsigned long **datap,
|
|
intc_enum **enums,
|
|
unsigned int *first,
|
|
unsigned int *width,
|
|
unsigned int *modep)
|
|
{
|
|
unsigned int i, mode;
|
|
|
|
/* this is slow but works for now */
|
|
|
|
if (desc->mask_regs) {
|
|
for (i = 0; i < desc->nr_mask_regs; i++) {
|
|
struct intc_mask_reg *mr = desc->mask_regs + i;
|
|
|
|
mode = sh_intc_mode(address, mr->set_reg, mr->clr_reg);
|
|
if (mode == INTC_MODE_NONE)
|
|
continue;
|
|
|
|
*modep = mode;
|
|
*datap = &mr->value;
|
|
*enums = mr->enum_ids;
|
|
*first = mr->reg_width - 1;
|
|
*width = 1;
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (desc->prio_regs) {
|
|
for (i = 0; i < desc->nr_prio_regs; i++) {
|
|
struct intc_prio_reg *pr = desc->prio_regs + i;
|
|
|
|
mode = sh_intc_mode(address, pr->set_reg, pr->clr_reg);
|
|
if (mode == INTC_MODE_NONE)
|
|
continue;
|
|
|
|
*modep = mode | INTC_MODE_IS_PRIO;
|
|
*datap = &pr->value;
|
|
*enums = pr->enum_ids;
|
|
*first = (pr->reg_width / pr->field_width) - 1;
|
|
*width = pr->field_width;
|
|
return;
|
|
}
|
|
}
|
|
|
|
assert(0);
|
|
}
|
|
|
|
static void sh_intc_toggle_mask(struct intc_desc *desc, intc_enum id,
|
|
int enable, int is_group)
|
|
{
|
|
struct intc_source *source = desc->sources + id;
|
|
|
|
if (!id)
|
|
return;
|
|
|
|
if (!source->next_enum_id && (!source->enable_max || !source->vect)) {
|
|
#ifdef DEBUG_INTC_SOURCES
|
|
printf("sh_intc: reserved interrupt source %d modified\n", id);
|
|
#endif
|
|
return;
|
|
}
|
|
|
|
if (source->vect)
|
|
sh_intc_toggle_source(source, enable ? 1 : -1, 0);
|
|
|
|
#ifdef DEBUG_INTC
|
|
else {
|
|
printf("setting interrupt group %d to %d\n", id, !!enable);
|
|
}
|
|
#endif
|
|
|
|
if ((is_group || !source->vect) && source->next_enum_id) {
|
|
sh_intc_toggle_mask(desc, source->next_enum_id, enable, 1);
|
|
}
|
|
|
|
#ifdef DEBUG_INTC
|
|
if (!source->vect) {
|
|
printf("setting interrupt group %d to %d - done\n", id, !!enable);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static uint32_t sh_intc_read(void *opaque, target_phys_addr_t offset)
|
|
{
|
|
struct intc_desc *desc = opaque;
|
|
intc_enum *enum_ids = NULL;
|
|
unsigned int first = 0;
|
|
unsigned int width = 0;
|
|
unsigned int mode = 0;
|
|
unsigned long *valuep;
|
|
|
|
#ifdef DEBUG_INTC
|
|
printf("sh_intc_read 0x%lx\n", (unsigned long) offset);
|
|
#endif
|
|
|
|
sh_intc_locate(desc, (unsigned long)offset, &valuep,
|
|
&enum_ids, &first, &width, &mode);
|
|
return *valuep;
|
|
}
|
|
|
|
static void sh_intc_write(void *opaque, target_phys_addr_t offset,
|
|
uint32_t value)
|
|
{
|
|
struct intc_desc *desc = opaque;
|
|
intc_enum *enum_ids = NULL;
|
|
unsigned int first = 0;
|
|
unsigned int width = 0;
|
|
unsigned int mode = 0;
|
|
unsigned int k;
|
|
unsigned long *valuep;
|
|
unsigned long mask;
|
|
|
|
#ifdef DEBUG_INTC
|
|
printf("sh_intc_write 0x%lx 0x%08x\n", (unsigned long) offset, value);
|
|
#endif
|
|
|
|
sh_intc_locate(desc, (unsigned long)offset, &valuep,
|
|
&enum_ids, &first, &width, &mode);
|
|
|
|
switch (mode) {
|
|
case INTC_MODE_ENABLE_REG | INTC_MODE_IS_PRIO: break;
|
|
case INTC_MODE_DUAL_SET: value |= *valuep; break;
|
|
case INTC_MODE_DUAL_CLR: value = *valuep & ~value; break;
|
|
default: assert(0);
|
|
}
|
|
|
|
for (k = 0; k <= first; k++) {
|
|
mask = ((1 << width) - 1) << ((first - k) * width);
|
|
|
|
if ((*valuep & mask) == (value & mask))
|
|
continue;
|
|
#if 0
|
|
printf("k = %d, first = %d, enum = %d, mask = 0x%08x\n",
|
|
k, first, enum_ids[k], (unsigned int)mask);
|
|
#endif
|
|
sh_intc_toggle_mask(desc, enum_ids[k], value & mask, 0);
|
|
}
|
|
|
|
*valuep = value;
|
|
|
|
#ifdef DEBUG_INTC
|
|
printf("sh_intc_write 0x%lx -> 0x%08x\n", (unsigned long) offset, value);
|
|
#endif
|
|
}
|
|
|
|
static CPUReadMemoryFunc * const sh_intc_readfn[] = {
|
|
sh_intc_read,
|
|
sh_intc_read,
|
|
sh_intc_read
|
|
};
|
|
|
|
static CPUWriteMemoryFunc * const sh_intc_writefn[] = {
|
|
sh_intc_write,
|
|
sh_intc_write,
|
|
sh_intc_write
|
|
};
|
|
|
|
struct intc_source *sh_intc_source(struct intc_desc *desc, intc_enum id)
|
|
{
|
|
if (id)
|
|
return desc->sources + id;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static void sh_intc_register(struct intc_desc *desc,
|
|
unsigned long address)
|
|
{
|
|
if (address) {
|
|
cpu_register_physical_memory_offset(P4ADDR(address), 4,
|
|
desc->iomemtype, INTC_A7(address));
|
|
cpu_register_physical_memory_offset(A7ADDR(address), 4,
|
|
desc->iomemtype, INTC_A7(address));
|
|
}
|
|
}
|
|
|
|
static void sh_intc_register_source(struct intc_desc *desc,
|
|
intc_enum source,
|
|
struct intc_group *groups,
|
|
int nr_groups)
|
|
{
|
|
unsigned int i, k;
|
|
struct intc_source *s;
|
|
|
|
if (desc->mask_regs) {
|
|
for (i = 0; i < desc->nr_mask_regs; i++) {
|
|
struct intc_mask_reg *mr = desc->mask_regs + i;
|
|
|
|
for (k = 0; k < ARRAY_SIZE(mr->enum_ids); k++) {
|
|
if (mr->enum_ids[k] != source)
|
|
continue;
|
|
|
|
s = sh_intc_source(desc, mr->enum_ids[k]);
|
|
if (s)
|
|
s->enable_max++;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (desc->prio_regs) {
|
|
for (i = 0; i < desc->nr_prio_regs; i++) {
|
|
struct intc_prio_reg *pr = desc->prio_regs + i;
|
|
|
|
for (k = 0; k < ARRAY_SIZE(pr->enum_ids); k++) {
|
|
if (pr->enum_ids[k] != source)
|
|
continue;
|
|
|
|
s = sh_intc_source(desc, pr->enum_ids[k]);
|
|
if (s)
|
|
s->enable_max++;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (groups) {
|
|
for (i = 0; i < nr_groups; i++) {
|
|
struct intc_group *gr = groups + i;
|
|
|
|
for (k = 0; k < ARRAY_SIZE(gr->enum_ids); k++) {
|
|
if (gr->enum_ids[k] != source)
|
|
continue;
|
|
|
|
s = sh_intc_source(desc, gr->enum_ids[k]);
|
|
if (s)
|
|
s->enable_max++;
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
void sh_intc_register_sources(struct intc_desc *desc,
|
|
struct intc_vect *vectors,
|
|
int nr_vectors,
|
|
struct intc_group *groups,
|
|
int nr_groups)
|
|
{
|
|
unsigned int i, k;
|
|
struct intc_source *s;
|
|
|
|
for (i = 0; i < nr_vectors; i++) {
|
|
struct intc_vect *vect = vectors + i;
|
|
|
|
sh_intc_register_source(desc, vect->enum_id, groups, nr_groups);
|
|
s = sh_intc_source(desc, vect->enum_id);
|
|
if (s)
|
|
s->vect = vect->vect;
|
|
|
|
#ifdef DEBUG_INTC_SOURCES
|
|
printf("sh_intc: registered source %d -> 0x%04x (%d/%d)\n",
|
|
vect->enum_id, s->vect, s->enable_count, s->enable_max);
|
|
#endif
|
|
}
|
|
|
|
if (groups) {
|
|
for (i = 0; i < nr_groups; i++) {
|
|
struct intc_group *gr = groups + i;
|
|
|
|
s = sh_intc_source(desc, gr->enum_id);
|
|
s->next_enum_id = gr->enum_ids[0];
|
|
|
|
for (k = 1; k < ARRAY_SIZE(gr->enum_ids); k++) {
|
|
if (!gr->enum_ids[k])
|
|
continue;
|
|
|
|
s = sh_intc_source(desc, gr->enum_ids[k - 1]);
|
|
s->next_enum_id = gr->enum_ids[k];
|
|
}
|
|
|
|
#ifdef DEBUG_INTC_SOURCES
|
|
printf("sh_intc: registered group %d (%d/%d)\n",
|
|
gr->enum_id, s->enable_count, s->enable_max);
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
|
|
int sh_intc_init(struct intc_desc *desc,
|
|
int nr_sources,
|
|
struct intc_mask_reg *mask_regs,
|
|
int nr_mask_regs,
|
|
struct intc_prio_reg *prio_regs,
|
|
int nr_prio_regs)
|
|
{
|
|
unsigned int i;
|
|
|
|
desc->pending = 0;
|
|
desc->nr_sources = nr_sources;
|
|
desc->mask_regs = mask_regs;
|
|
desc->nr_mask_regs = nr_mask_regs;
|
|
desc->prio_regs = prio_regs;
|
|
desc->nr_prio_regs = nr_prio_regs;
|
|
|
|
i = sizeof(struct intc_source) * nr_sources;
|
|
desc->sources = qemu_malloc(i);
|
|
|
|
memset(desc->sources, 0, i);
|
|
for (i = 0; i < desc->nr_sources; i++) {
|
|
struct intc_source *source = desc->sources + i;
|
|
|
|
source->parent = desc;
|
|
}
|
|
|
|
desc->irqs = qemu_allocate_irqs(sh_intc_set_irq, desc, nr_sources);
|
|
|
|
desc->iomemtype = cpu_register_io_memory(sh_intc_readfn,
|
|
sh_intc_writefn, desc);
|
|
if (desc->mask_regs) {
|
|
for (i = 0; i < desc->nr_mask_regs; i++) {
|
|
struct intc_mask_reg *mr = desc->mask_regs + i;
|
|
|
|
sh_intc_register(desc, mr->set_reg);
|
|
sh_intc_register(desc, mr->clr_reg);
|
|
}
|
|
}
|
|
|
|
if (desc->prio_regs) {
|
|
for (i = 0; i < desc->nr_prio_regs; i++) {
|
|
struct intc_prio_reg *pr = desc->prio_regs + i;
|
|
|
|
sh_intc_register(desc, pr->set_reg);
|
|
sh_intc_register(desc, pr->clr_reg);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Assert level <n> IRL interrupt.
|
|
0:deassert. 1:lowest priority,... 15:highest priority. */
|
|
void sh_intc_set_irl(void *opaque, int n, int level)
|
|
{
|
|
struct intc_source *s = opaque;
|
|
int i, irl = level ^ 15;
|
|
for (i = 0; (s = sh_intc_source(s->parent, s->next_enum_id)); i++) {
|
|
if (i == irl)
|
|
sh_intc_toggle_source(s, s->enable_count?0:1, s->asserted?0:1);
|
|
else
|
|
if (s->asserted)
|
|
sh_intc_toggle_source(s, 0, -1);
|
|
}
|
|
}
|