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835806f1f9
xemu/hw/timer/sh_timer.c
BALATON Zoltan 46e44759fc hw/timer/sh_timer: Remove use of hw_error 
The hw_error function calls abort and is not meant to be used by
devices. Use qemu_log_mask instead to log and ignore invalid accesses.
Also fix format strings to allow dropping type casts of hwaddr and use
__func__ instead of hard coding function name in the message which
were wrong in two cases.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <f818dc3dd2ac8c3b3d53067f316a716d7f9683d8.1635541329.git.balaton@eik.bme.hu>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2021-10-30 18:39:37 +02:00

374 lines
10 KiB
C
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/*
* SuperH Timer modules.
*
* Copyright (c) 2007 Magnus Damm
* Based on arm_timer.c by Paul Brook
* Copyright (c) 2005-2006 CodeSourcery.
*
* This code is licensed under the GPL.
*/
#include "qemu/osdep.h"
#include "exec/memory.h"
#include "qemu/log.h"
#include "hw/irq.h"
#include "hw/sh4/sh.h"
#include "hw/timer/tmu012.h"
#include "hw/ptimer.h"
#include "trace.h"
#define TIMER_TCR_TPSC (7 << 0)
#define TIMER_TCR_CKEG (3 << 3)
#define TIMER_TCR_UNIE (1 << 5)
#define TIMER_TCR_ICPE (3 << 6)
#define TIMER_TCR_UNF (1 << 8)
#define TIMER_TCR_ICPF (1 << 9)
#define TIMER_TCR_RESERVED (0x3f << 10)
#define TIMER_FEAT_CAPT (1 << 0)
#define TIMER_FEAT_EXTCLK (1 << 1)
#define OFFSET_TCOR 0
#define OFFSET_TCNT 1
#define OFFSET_TCR 2
#define OFFSET_TCPR 3
typedef struct {
ptimer_state *timer;
uint32_t tcnt;
uint32_t tcor;
uint32_t tcr;
uint32_t tcpr;
int freq;
int int_level;
int old_level;
int feat;
int enabled;
qemu_irq irq;
} SHTimerState;
/* Check all active timers, and schedule the next timer interrupt. */
static void sh_timer_update(SHTimerState *s)
{
int new_level = s->int_level && (s->tcr & TIMER_TCR_UNIE);
if (new_level != s->old_level) {
qemu_set_irq(s->irq, new_level);
}
s->old_level = s->int_level;
s->int_level = new_level;
}
static uint32_t sh_timer_read(void *opaque, hwaddr offset)
{
SHTimerState *s = opaque;
switch (offset >> 2) {
case OFFSET_TCOR:
return s->tcor;
case OFFSET_TCNT:
return ptimer_get_count(s->timer);
case OFFSET_TCR:
return s->tcr | (s->int_level ? TIMER_TCR_UNF : 0);
case OFFSET_TCPR:
if (s->feat & TIMER_FEAT_CAPT) {
return s->tcpr;
}
}
qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset 0x%" HWADDR_PRIx "\n",
__func__, offset);
return 0;
}
static void sh_timer_write(void *opaque, hwaddr offset, uint32_t value)
{
SHTimerState *s = opaque;
int freq;
switch (offset >> 2) {
case OFFSET_TCOR:
s->tcor = value;
ptimer_transaction_begin(s->timer);
ptimer_set_limit(s->timer, s->tcor, 0);
ptimer_transaction_commit(s->timer);
break;
case OFFSET_TCNT:
s->tcnt = value;
ptimer_transaction_begin(s->timer);
ptimer_set_count(s->timer, s->tcnt);
ptimer_transaction_commit(s->timer);
break;
case OFFSET_TCR:
ptimer_transaction_begin(s->timer);
if (s->enabled) {
/*
* Pause the timer if it is running. This may cause some inaccuracy
* due to rounding, but avoids a whole lot of other messiness
*/
ptimer_stop(s->timer);
}
freq = s->freq;
/* ??? Need to recalculate expiry time after changing divisor. */
switch (value & TIMER_TCR_TPSC) {
case 0:
freq >>= 2;
break;
case 1:
freq >>= 4;
break;
case 2:
freq >>= 6;
break;
case 3:
freq >>= 8;
break;
case 4:
freq >>= 10;
break;
case 6:
case 7:
if (s->feat & TIMER_FEAT_EXTCLK) {
break;
}
/* fallthrough */
default:
qemu_log_mask(LOG_GUEST_ERROR,
"%s: Reserved TPSC value\n", __func__);
}
switch ((value & TIMER_TCR_CKEG) >> 3) {
case 0:
break;
case 1:
case 2:
case 3:
if (s->feat & TIMER_FEAT_EXTCLK) {
break;
}
/* fallthrough */
default:
qemu_log_mask(LOG_GUEST_ERROR,
"%s: Reserved CKEG value\n", __func__);
}
switch ((value & TIMER_TCR_ICPE) >> 6) {
case 0:
break;
case 2:
case 3:
if (s->feat & TIMER_FEAT_CAPT) {
break;
}
/* fallthrough */
default:
qemu_log_mask(LOG_GUEST_ERROR,
"%s: Reserved ICPE value\n", __func__);
}
if ((value & TIMER_TCR_UNF) == 0) {
s->int_level = 0;
}
value &= ~TIMER_TCR_UNF;
if ((value & TIMER_TCR_ICPF) && (!(s->feat & TIMER_FEAT_CAPT))) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: Reserved ICPF value\n", __func__);
}
value &= ~TIMER_TCR_ICPF; /* capture not supported */
if (value & TIMER_TCR_RESERVED) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: Reserved TCR bits set\n", __func__);
}
s->tcr = value;
ptimer_set_limit(s->timer, s->tcor, 0);
ptimer_set_freq(s->timer, freq);
if (s->enabled) {
/* Restart the timer if still enabled. */
ptimer_run(s->timer, 0);
}
ptimer_transaction_commit(s->timer);
break;
case OFFSET_TCPR:
if (s->feat & TIMER_FEAT_CAPT) {
s->tcpr = value;
break;
}
/* fallthrough */
default:
qemu_log_mask(LOG_GUEST_ERROR,
"%s: Bad offset 0x%" HWADDR_PRIx "\n", __func__, offset);
}
sh_timer_update(s);
}
static void sh_timer_start_stop(void *opaque, int enable)
{
SHTimerState *s = opaque;
trace_sh_timer_start_stop(enable, s->enabled);
ptimer_transaction_begin(s->timer);
if (s->enabled && !enable) {
ptimer_stop(s->timer);
}
if (!s->enabled && enable) {
ptimer_run(s->timer, 0);
}
ptimer_transaction_commit(s->timer);
s->enabled = !!enable;
}
static void sh_timer_tick(void *opaque)
{
SHTimerState *s = opaque;
s->int_level = s->enabled;
sh_timer_update(s);
}
static void *sh_timer_init(uint32_t freq, int feat, qemu_irq irq)
{
SHTimerState *s;
s = g_malloc0(sizeof(*s));
s->freq = freq;
s->feat = feat;
s->tcor = 0xffffffff;
s->tcnt = 0xffffffff;
s->tcpr = 0xdeadbeef;
s->tcr = 0;
s->enabled = 0;
s->irq = irq;
s->timer = ptimer_init(sh_timer_tick, s, PTIMER_POLICY_DEFAULT);
sh_timer_write(s, OFFSET_TCOR >> 2, s->tcor);
sh_timer_write(s, OFFSET_TCNT >> 2, s->tcnt);
sh_timer_write(s, OFFSET_TCPR >> 2, s->tcpr);
sh_timer_write(s, OFFSET_TCR >> 2, s->tcpr);
/* ??? Save/restore. */
return s;
}
typedef struct {
MemoryRegion iomem;
MemoryRegion iomem_p4;
MemoryRegion iomem_a7;
void *timer[3];
int level[3];
uint32_t tocr;
uint32_t tstr;
int feat;
} tmu012_state;
static uint64_t tmu012_read(void *opaque, hwaddr offset, unsigned size)
{
tmu012_state *s = opaque;
trace_sh_timer_read(offset);
if (offset >= 0x20) {
if (!(s->feat & TMU012_FEAT_3CHAN)) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: Bad channel offset 0x%" HWADDR_PRIx "\n",
__func__, offset);
}
return sh_timer_read(s->timer[2], offset - 0x20);
}
if (offset >= 0x14) {
return sh_timer_read(s->timer[1], offset - 0x14);
}
if (offset >= 0x08) {
return sh_timer_read(s->timer[0], offset - 0x08);
}
if (offset == 4) {
return s->tstr;
}
if ((s->feat & TMU012_FEAT_TOCR) && offset == 0) {
return s->tocr;
}
qemu_log_mask(LOG_GUEST_ERROR,
"%s: Bad offset 0x%" HWADDR_PRIx "\n", __func__, offset);
return 0;
}
static void tmu012_write(void *opaque, hwaddr offset,
uint64_t value, unsigned size)
{
tmu012_state *s = opaque;
trace_sh_timer_write(offset, value);
if (offset >= 0x20) {
if (!(s->feat & TMU012_FEAT_3CHAN)) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: Bad channel offset 0x%" HWADDR_PRIx "\n",
__func__, offset);
}
sh_timer_write(s->timer[2], offset - 0x20, value);
return;
}
if (offset >= 0x14) {
sh_timer_write(s->timer[1], offset - 0x14, value);
return;
}
if (offset >= 0x08) {
sh_timer_write(s->timer[0], offset - 0x08, value);
return;
}
if (offset == 4) {
sh_timer_start_stop(s->timer[0], value & (1 << 0));
sh_timer_start_stop(s->timer[1], value & (1 << 1));
if (s->feat & TMU012_FEAT_3CHAN) {
sh_timer_start_stop(s->timer[2], value & (1 << 2));
} else {
if (value & (1 << 2)) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad channel\n", __func__);
}
}
s->tstr = value;
return;
}
if ((s->feat & TMU012_FEAT_TOCR) && offset == 0) {
s->tocr = value & (1 << 0);
}
}
static const MemoryRegionOps tmu012_ops = {
.read = tmu012_read,
.write = tmu012_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
void tmu012_init(MemoryRegion *sysmem, hwaddr base, int feat, uint32_t freq,
qemu_irq ch0_irq, qemu_irq ch1_irq,
qemu_irq ch2_irq0, qemu_irq ch2_irq1)
{
tmu012_state *s;
int timer_feat = (feat & TMU012_FEAT_EXTCLK) ? TIMER_FEAT_EXTCLK : 0;
s = g_malloc0(sizeof(*s));
s->feat = feat;
s->timer[0] = sh_timer_init(freq, timer_feat, ch0_irq);
s->timer[1] = sh_timer_init(freq, timer_feat, ch1_irq);
if (feat & TMU012_FEAT_3CHAN) {
s->timer[2] = sh_timer_init(freq, timer_feat | TIMER_FEAT_CAPT,
ch2_irq0); /* ch2_irq1 not supported */
}
memory_region_init_io(&s->iomem, NULL, &tmu012_ops, s, "timer", 0x30);
memory_region_init_alias(&s->iomem_p4, NULL, "timer-p4",
&s->iomem, 0, memory_region_size(&s->iomem));
memory_region_add_subregion(sysmem, P4ADDR(base), &s->iomem_p4);
memory_region_init_alias(&s->iomem_a7, NULL, "timer-a7",
&s->iomem, 0, memory_region_size(&s->iomem));
memory_region_add_subregion(sysmem, A7ADDR(base), &s->iomem_a7);
/* ??? Save/restore. */
}
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