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qemu/hw/misc/zynq-xadc.c
Markus Armbruster d5938f29fe Clean up inclusion of sysemu/sysemu.h 
In my "build everything" tree, changing sysemu/sysemu.h triggers a
recompile of some 5400 out of 6600 objects (not counting tests and
objects that don't depend on qemu/osdep.h).

Almost a third of its inclusions are actually superfluous.  Delete
them.  Downgrade two more to qapi/qapi-types-run-state.h, and move one
from char/serial.h to char/serial.c.

hw/semihosting/config.c, monitor/monitor.c, qdev-monitor.c, and
stubs/semihost.c define variables declared in sysemu/sysemu.h without
including it.  The compiler is cool with that, but include it anyway.

This doesn't reduce actual use much, as it's still included into
widely included headers.  The next commit will tackle that.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20190812052359.30071-27-armbru@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
2019-08-16 13:31:53 +02:00

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/*
* ADC registers for Xilinx Zynq Platform
*
* Copyright (c) 2015 Guenter Roeck
* Based on hw/misc/zynq_slcr.c, written by Michal Simek
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "hw/irq.h"
#include "hw/misc/zynq-xadc.h"
#include "migration/vmstate.h"
#include "qemu/timer.h"
#include "qemu/log.h"
#include "qemu/module.h"
enum {
CFG = 0x000 / 4,
INT_STS,
INT_MASK,
MSTS,
CMDFIFO,
RDFIFO,
MCTL,
};
#define CFG_ENABLE BIT(31)
#define CFG_CFIFOTH_SHIFT 20
#define CFG_CFIFOTH_LENGTH 4
#define CFG_DFIFOTH_SHIFT 16
#define CFG_DFIFOTH_LENGTH 4
#define CFG_WEDGE BIT(13)
#define CFG_REDGE BIT(12)
#define CFG_TCKRATE_SHIFT 8
#define CFG_TCKRATE_LENGTH 2
#define CFG_TCKRATE_DIV(x) (0x1 << (x - 1))
#define CFG_IGAP_SHIFT 0
#define CFG_IGAP_LENGTH 5
#define INT_CFIFO_LTH BIT(9)
#define INT_DFIFO_GTH BIT(8)
#define INT_OT BIT(7)
#define INT_ALM_SHIFT 0
#define INT_ALM_LENGTH 7
#define INT_ALM_MASK (((1 << INT_ALM_LENGTH) - 1) << INT_ALM_SHIFT)
#define INT_ALL (INT_CFIFO_LTH | INT_DFIFO_GTH | INT_OT | INT_ALM_MASK)
#define MSTS_CFIFO_LVL_SHIFT 16
#define MSTS_CFIFO_LVL_LENGTH 4
#define MSTS_DFIFO_LVL_SHIFT 12
#define MSTS_DFIFO_LVL_LENGTH 4
#define MSTS_CFIFOF BIT(11)
#define MSTS_CFIFOE BIT(10)
#define MSTS_DFIFOF BIT(9)
#define MSTS_DFIFOE BIT(8)
#define MSTS_OT BIT(7)
#define MSTS_ALM_SHIFT 0
#define MSTS_ALM_LENGTH 7
#define MCTL_RESET BIT(4)
#define CMD_NOP 0x00
#define CMD_READ 0x01
#define CMD_WRITE 0x02
static void zynq_xadc_update_ints(ZynqXADCState *s)
{
/* We are fast, commands are actioned instantly so the CFIFO is always
* empty (and below threshold).
*/
s->regs[INT_STS] |= INT_CFIFO_LTH;
if (s->xadc_dfifo_entries >
extract32(s->regs[CFG], CFG_DFIFOTH_SHIFT, CFG_DFIFOTH_LENGTH)) {
s->regs[INT_STS] |= INT_DFIFO_GTH;
}
qemu_set_irq(s->qemu_irq, !!(s->regs[INT_STS] & ~s->regs[INT_MASK]));
}
static void zynq_xadc_reset(DeviceState *d)
{
ZynqXADCState *s = ZYNQ_XADC(d);
s->regs[CFG] = 0x14 << CFG_IGAP_SHIFT |
CFG_TCKRATE_DIV(4) << CFG_TCKRATE_SHIFT | CFG_REDGE;
s->regs[INT_STS] = INT_CFIFO_LTH;
s->regs[INT_MASK] = 0xffffffff;
s->regs[CMDFIFO] = 0;
s->regs[RDFIFO] = 0;
s->regs[MCTL] = MCTL_RESET;
memset(s->xadc_regs, 0, sizeof(s->xadc_regs));
memset(s->xadc_dfifo, 0, sizeof(s->xadc_dfifo));
s->xadc_dfifo_entries = 0;
zynq_xadc_update_ints(s);
}
static uint16_t xadc_pop_dfifo(ZynqXADCState *s)
{
uint16_t rv = s->xadc_dfifo[0];
int i;
if (s->xadc_dfifo_entries > 0) {
s->xadc_dfifo_entries--;
}
for (i = 0; i < s->xadc_dfifo_entries; i++) {
s->xadc_dfifo[i] = s->xadc_dfifo[i + 1];
}
s->xadc_dfifo[s->xadc_dfifo_entries] = 0;
zynq_xadc_update_ints(s);
return rv;
}
static void xadc_push_dfifo(ZynqXADCState *s, uint16_t regval)
{
if (s->xadc_dfifo_entries < ZYNQ_XADC_FIFO_DEPTH) {
s->xadc_dfifo[s->xadc_dfifo_entries++] = s->xadc_read_reg_previous;
}
s->xadc_read_reg_previous = regval;
zynq_xadc_update_ints(s);
}
static bool zynq_xadc_check_offset(hwaddr offset, bool rnw)
{
switch (offset) {
case CFG:
case INT_MASK:
case INT_STS:
case MCTL:
return true;
case RDFIFO:
case MSTS:
return rnw; /* read only */
case CMDFIFO:
return !rnw; /* write only */
default:
return false;
}
}
static uint64_t zynq_xadc_read(void *opaque, hwaddr offset, unsigned size)
{
ZynqXADCState *s = opaque;
int reg = offset / 4;
uint32_t rv = 0;
if (!zynq_xadc_check_offset(reg, true)) {
qemu_log_mask(LOG_GUEST_ERROR, "zynq_xadc: Invalid read access to "
"addr %" HWADDR_PRIx "\n", offset);
return 0;
}
switch (reg) {
case CFG:
case INT_MASK:
case INT_STS:
case MCTL:
rv = s->regs[reg];
break;
case MSTS:
rv = MSTS_CFIFOE;
rv |= s->xadc_dfifo_entries << MSTS_DFIFO_LVL_SHIFT;
if (!s->xadc_dfifo_entries) {
rv |= MSTS_DFIFOE;
} else if (s->xadc_dfifo_entries == ZYNQ_XADC_FIFO_DEPTH) {
rv |= MSTS_DFIFOF;
}
break;
case RDFIFO:
rv = xadc_pop_dfifo(s);
break;
}
return rv;
}
static void zynq_xadc_write(void *opaque, hwaddr offset, uint64_t val,
unsigned size)
{
ZynqXADCState *s = (ZynqXADCState *)opaque;
int reg = offset / 4;
int xadc_reg;
int xadc_cmd;
int xadc_data;
if (!zynq_xadc_check_offset(reg, false)) {
qemu_log_mask(LOG_GUEST_ERROR, "zynq_xadc: Invalid write access "
"to addr %" HWADDR_PRIx "\n", offset);
return;
}
switch (reg) {
case CFG:
s->regs[CFG] = val;
break;
case INT_STS:
s->regs[INT_STS] &= ~val;
break;
case INT_MASK:
s->regs[INT_MASK] = val & INT_ALL;
break;
case CMDFIFO:
xadc_cmd = extract32(val, 26, 4);
xadc_reg = extract32(val, 16, 10);
xadc_data = extract32(val, 0, 16);
if (s->regs[MCTL] & MCTL_RESET) {
qemu_log_mask(LOG_GUEST_ERROR, "zynq_xadc: Sending command "
"while comm channel held in reset: %" PRIx32 "\n",
(uint32_t) val);
break;
}
if (xadc_reg >= ZYNQ_XADC_NUM_ADC_REGS && xadc_cmd != CMD_NOP) {
qemu_log_mask(LOG_GUEST_ERROR, "read/write op to invalid xadc "
"reg 0x%x\n", xadc_reg);
break;
}
switch (xadc_cmd) {
case CMD_READ:
xadc_push_dfifo(s, s->xadc_regs[xadc_reg]);
break;
case CMD_WRITE:
s->xadc_regs[xadc_reg] = xadc_data;
/* fallthrough */
case CMD_NOP:
xadc_push_dfifo(s, 0);
break;
}
break;
case MCTL:
s->regs[MCTL] = val & 0x00fffeff;
break;
}
zynq_xadc_update_ints(s);
}
static const MemoryRegionOps xadc_ops = {
.read = zynq_xadc_read,
.write = zynq_xadc_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
static void zynq_xadc_init(Object *obj)
{
SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
ZynqXADCState *s = ZYNQ_XADC(obj);
memory_region_init_io(&s->iomem, obj, &xadc_ops, s, "zynq-xadc",
ZYNQ_XADC_MMIO_SIZE);
sysbus_init_mmio(sbd, &s->iomem);
sysbus_init_irq(sbd, &s->qemu_irq);
}
static const VMStateDescription vmstate_zynq_xadc = {
.name = "zynq-xadc",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32_ARRAY(regs, ZynqXADCState, ZYNQ_XADC_NUM_IO_REGS),
VMSTATE_UINT16_ARRAY(xadc_regs, ZynqXADCState,
ZYNQ_XADC_NUM_ADC_REGS),
VMSTATE_UINT16_ARRAY(xadc_dfifo, ZynqXADCState,
ZYNQ_XADC_FIFO_DEPTH),
VMSTATE_UINT16(xadc_read_reg_previous, ZynqXADCState),
VMSTATE_UINT16(xadc_dfifo_entries, ZynqXADCState),
VMSTATE_END_OF_LIST()
}
};
static void zynq_xadc_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->vmsd = &vmstate_zynq_xadc;
dc->reset = zynq_xadc_reset;
}
static const TypeInfo zynq_xadc_info = {
.class_init = zynq_xadc_class_init,
.name = TYPE_ZYNQ_XADC,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(ZynqXADCState),
.instance_init = zynq_xadc_init,
};
static void zynq_xadc_register_types(void)
{
type_register_static(&zynq_xadc_info);
}
type_init(zynq_xadc_register_types)
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