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xemu/hw/arm_sysctl.c
Peter Maydell 1f81f94beb hw/arm_sysctl: Implement SYS_CFG_OSC function 
Implement the SYS_CFG_OSC function. Since the idea of
programmable clock rates doesn't make much sense for QEMU,
we simply allow the clock rate to be read back as written.
The number and value of the daughterboard oscillators varies
between daughterboards, so we provide an array property to
allow their reset values to be configured.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2013-03-15 16:41:57 +00:00

650 lines
20 KiB
C
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/*
* Status and system control registers for ARM RealView/Versatile boards.
*
* Copyright (c) 2006-2007 CodeSourcery.
* Written by Paul Brook
*
* This code is licensed under the GPL.
*/
#include "hw/hw.h"
#include "qemu/timer.h"
#include "qemu/bitops.h"
#include "hw/sysbus.h"
#include "hw/primecell.h"
#include "sysemu/sysemu.h"
#define LOCK_VALUE 0xa05f
typedef struct {
SysBusDevice busdev;
MemoryRegion iomem;
qemu_irq pl110_mux_ctrl;
uint32_t sys_id;
uint32_t leds;
uint16_t lockval;
uint32_t cfgdata1;
uint32_t cfgdata2;
uint32_t flags;
uint32_t nvflags;
uint32_t resetlevel;
uint32_t proc_id;
uint32_t sys_mci;
uint32_t sys_cfgdata;
uint32_t sys_cfgctrl;
uint32_t sys_cfgstat;
uint32_t sys_clcd;
uint32_t mb_clock[6];
uint32_t *db_clock;
uint32_t db_num_vsensors;
uint32_t *db_voltage;
uint32_t db_num_clocks;
uint32_t *db_clock_reset;
} arm_sysctl_state;
static const VMStateDescription vmstate_arm_sysctl = {
.name = "realview_sysctl",
.version_id = 4,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32(leds, arm_sysctl_state),
VMSTATE_UINT16(lockval, arm_sysctl_state),
VMSTATE_UINT32(cfgdata1, arm_sysctl_state),
VMSTATE_UINT32(cfgdata2, arm_sysctl_state),
VMSTATE_UINT32(flags, arm_sysctl_state),
VMSTATE_UINT32(nvflags, arm_sysctl_state),
VMSTATE_UINT32(resetlevel, arm_sysctl_state),
VMSTATE_UINT32_V(sys_mci, arm_sysctl_state, 2),
VMSTATE_UINT32_V(sys_cfgdata, arm_sysctl_state, 2),
VMSTATE_UINT32_V(sys_cfgctrl, arm_sysctl_state, 2),
VMSTATE_UINT32_V(sys_cfgstat, arm_sysctl_state, 2),
VMSTATE_UINT32_V(sys_clcd, arm_sysctl_state, 3),
VMSTATE_UINT32_ARRAY_V(mb_clock, arm_sysctl_state, 6, 4),
VMSTATE_VARRAY_UINT32(db_clock, arm_sysctl_state, db_num_clocks,
4, vmstate_info_uint32, uint32_t),
VMSTATE_END_OF_LIST()
}
};
/* The PB926 actually uses a different format for
* its SYS_ID register. Fortunately the bits which are
* board type on later boards are distinct.
*/
#define BOARD_ID_PB926 0x100
#define BOARD_ID_EB 0x140
#define BOARD_ID_PBA8 0x178
#define BOARD_ID_PBX 0x182
#define BOARD_ID_VEXPRESS 0x190
static int board_id(arm_sysctl_state *s)
{
/* Extract the board ID field from the SYS_ID register value */
return (s->sys_id >> 16) & 0xfff;
}
static void arm_sysctl_reset(DeviceState *d)
{
arm_sysctl_state *s = FROM_SYSBUS(arm_sysctl_state, SYS_BUS_DEVICE(d));
int i;
s->leds = 0;
s->lockval = 0;
s->cfgdata1 = 0;
s->cfgdata2 = 0;
s->flags = 0;
s->resetlevel = 0;
/* Motherboard oscillators (in Hz) */
s->mb_clock[0] = 50000000; /* Static memory clock: 50MHz */
s->mb_clock[1] = 23750000; /* motherboard CLCD clock: 23.75MHz */
s->mb_clock[2] = 24000000; /* IO FPGA peripheral clock: 24MHz */
s->mb_clock[3] = 24000000; /* IO FPGA reserved clock: 24MHz */
s->mb_clock[4] = 24000000; /* System bus global clock: 24MHz */
s->mb_clock[5] = 24000000; /* IO FPGA reserved clock: 24MHz */
/* Daughterboard oscillators: reset from property values */
for (i = 0; i < s->db_num_clocks; i++) {
s->db_clock[i] = s->db_clock_reset[i];
}
if (board_id(s) == BOARD_ID_VEXPRESS) {
/* On VExpress this register will RAZ/WI */
s->sys_clcd = 0;
} else {
/* All others: CLCDID 0x1f, indicating VGA */
s->sys_clcd = 0x1f00;
}
}
static uint64_t arm_sysctl_read(void *opaque, hwaddr offset,
unsigned size)
{
arm_sysctl_state *s = (arm_sysctl_state *)opaque;
switch (offset) {
case 0x00: /* ID */
return s->sys_id;
case 0x04: /* SW */
/* General purpose hardware switches.
We don't have a useful way of exposing these to the user. */
return 0;
case 0x08: /* LED */
return s->leds;
case 0x20: /* LOCK */
return s->lockval;
case 0x0c: /* OSC0 */
case 0x10: /* OSC1 */
case 0x14: /* OSC2 */
case 0x18: /* OSC3 */
case 0x1c: /* OSC4 */
case 0x24: /* 100HZ */
/* ??? Implement these. */
return 0;
case 0x28: /* CFGDATA1 */
return s->cfgdata1;
case 0x2c: /* CFGDATA2 */
return s->cfgdata2;
case 0x30: /* FLAGS */
return s->flags;
case 0x38: /* NVFLAGS */
return s->nvflags;
case 0x40: /* RESETCTL */
if (board_id(s) == BOARD_ID_VEXPRESS) {
/* reserved: RAZ/WI */
return 0;
}
return s->resetlevel;
case 0x44: /* PCICTL */
return 1;
case 0x48: /* MCI */
return s->sys_mci;
case 0x4c: /* FLASH */
return 0;
case 0x50: /* CLCD */
return s->sys_clcd;
case 0x54: /* CLCDSER */
return 0;
case 0x58: /* BOOTCS */
return 0;
case 0x5c: /* 24MHz */
return muldiv64(qemu_get_clock_ns(vm_clock), 24000000, get_ticks_per_sec());
case 0x60: /* MISC */
return 0;
case 0x84: /* PROCID0 */
return s->proc_id;
case 0x88: /* PROCID1 */
return 0xff000000;
case 0x64: /* DMAPSR0 */
case 0x68: /* DMAPSR1 */
case 0x6c: /* DMAPSR2 */
case 0x70: /* IOSEL */
case 0x74: /* PLDCTL */
case 0x80: /* BUSID */
case 0x8c: /* OSCRESET0 */
case 0x90: /* OSCRESET1 */
case 0x94: /* OSCRESET2 */
case 0x98: /* OSCRESET3 */
case 0x9c: /* OSCRESET4 */
case 0xc0: /* SYS_TEST_OSC0 */
case 0xc4: /* SYS_TEST_OSC1 */
case 0xc8: /* SYS_TEST_OSC2 */
case 0xcc: /* SYS_TEST_OSC3 */
case 0xd0: /* SYS_TEST_OSC4 */
return 0;
case 0xa0: /* SYS_CFGDATA */
if (board_id(s) != BOARD_ID_VEXPRESS) {
goto bad_reg;
}
return s->sys_cfgdata;
case 0xa4: /* SYS_CFGCTRL */
if (board_id(s) != BOARD_ID_VEXPRESS) {
goto bad_reg;
}
return s->sys_cfgctrl;
case 0xa8: /* SYS_CFGSTAT */
if (board_id(s) != BOARD_ID_VEXPRESS) {
goto bad_reg;
}
return s->sys_cfgstat;
default:
bad_reg:
qemu_log_mask(LOG_GUEST_ERROR,
"arm_sysctl_read: Bad register offset 0x%x\n",
(int)offset);
return 0;
}
}
/* SYS_CFGCTRL functions */
#define SYS_CFG_OSC 1
#define SYS_CFG_VOLT 2
#define SYS_CFG_AMP 3
#define SYS_CFG_TEMP 4
#define SYS_CFG_RESET 5
#define SYS_CFG_SCC 6
#define SYS_CFG_MUXFPGA 7
#define SYS_CFG_SHUTDOWN 8
#define SYS_CFG_REBOOT 9
#define SYS_CFG_DVIMODE 11
#define SYS_CFG_POWER 12
#define SYS_CFG_ENERGY 13
/* SYS_CFGCTRL site field values */
#define SYS_CFG_SITE_MB 0
#define SYS_CFG_SITE_DB1 1
#define SYS_CFG_SITE_DB2 2
/**
* vexpress_cfgctrl_read:
* @s: arm_sysctl_state pointer
* @dcc, @function, @site, @position, @device: split out values from
* SYS_CFGCTRL register
* @val: pointer to where to put the read data on success
*
* Handle a VExpress SYS_CFGCTRL register read. On success, return true and
* write the read value to *val. On failure, return false (and val may
* or may not be written to).
*/
static bool vexpress_cfgctrl_read(arm_sysctl_state *s, unsigned int dcc,
unsigned int function, unsigned int site,
unsigned int position, unsigned int device,
uint32_t *val)
{
/* We don't support anything other than DCC 0, board stack position 0
* or sites other than motherboard/daughterboard:
*/
if (dcc != 0 || position != 0 ||
(site != SYS_CFG_SITE_MB && site != SYS_CFG_SITE_DB1)) {
goto cfgctrl_unimp;
}
switch (function) {
case SYS_CFG_VOLT:
if (site == SYS_CFG_SITE_DB1 && device < s->db_num_vsensors) {
*val = s->db_voltage[device];
return true;
}
if (site == SYS_CFG_SITE_MB && device == 0) {
/* There is only one motherboard voltage sensor:
* VIO : 3.3V : bus voltage between mother and daughterboard
*/
*val = 3300000;
return true;
}
break;
case SYS_CFG_OSC:
if (site == SYS_CFG_SITE_MB && device < sizeof(s->mb_clock)) {
/* motherboard clock */
*val = s->mb_clock[device];
return true;
}
if (site == SYS_CFG_SITE_DB1 && device < s->db_num_clocks) {
/* daughterboard clock */
*val = s->db_clock[device];
return true;
}
break;
default:
break;
}
cfgctrl_unimp:
qemu_log_mask(LOG_UNIMP,
"arm_sysctl: Unimplemented SYS_CFGCTRL read of function "
"0x%x DCC 0x%x site 0x%x position 0x%x device 0x%x\n",
function, dcc, site, position, device);
return false;
}
/**
* vexpress_cfgctrl_write:
* @s: arm_sysctl_state pointer
* @dcc, @function, @site, @position, @device: split out values from
* SYS_CFGCTRL register
* @val: data to write
*
* Handle a VExpress SYS_CFGCTRL register write. On success, return true.
* On failure, return false.
*/
static bool vexpress_cfgctrl_write(arm_sysctl_state *s, unsigned int dcc,
unsigned int function, unsigned int site,
unsigned int position, unsigned int device,
uint32_t val)
{
/* We don't support anything other than DCC 0, board stack position 0
* or sites other than motherboard/daughterboard:
*/
if (dcc != 0 || position != 0 ||
(site != SYS_CFG_SITE_MB && site != SYS_CFG_SITE_DB1)) {
goto cfgctrl_unimp;
}
switch (function) {
case SYS_CFG_OSC:
if (site == SYS_CFG_SITE_MB && device < sizeof(s->mb_clock)) {
/* motherboard clock */
s->mb_clock[device] = val;
return true;
}
if (site == SYS_CFG_SITE_DB1 && device < s->db_num_clocks) {
/* daughterboard clock */
s->db_clock[device] = val;
return true;
}
break;
case SYS_CFG_MUXFPGA:
if (site == SYS_CFG_SITE_MB && device == 0) {
/* Select whether video output comes from motherboard
* or daughterboard: log and ignore as QEMU doesn't
* support this.
*/
qemu_log_mask(LOG_UNIMP, "arm_sysctl: selection of video output "
"not supported, ignoring\n");
return true;
}
break;
case SYS_CFG_SHUTDOWN:
if (site == SYS_CFG_SITE_MB && device == 0) {
qemu_system_shutdown_request();
return true;
}
break;
case SYS_CFG_REBOOT:
if (site == SYS_CFG_SITE_MB && device == 0) {
qemu_system_reset_request();
return true;
}
break;
case SYS_CFG_DVIMODE:
if (site == SYS_CFG_SITE_MB && device == 0) {
/* Selecting DVI mode is meaningless for QEMU: we will
* always display the output correctly according to the
* pixel height/width programmed into the CLCD controller.
*/
return true;
}
default:
break;
}
cfgctrl_unimp:
qemu_log_mask(LOG_UNIMP,
"arm_sysctl: Unimplemented SYS_CFGCTRL write of function "
"0x%x DCC 0x%x site 0x%x position 0x%x device 0x%x\n",
function, dcc, site, position, device);
return false;
}
static void arm_sysctl_write(void *opaque, hwaddr offset,
uint64_t val, unsigned size)
{
arm_sysctl_state *s = (arm_sysctl_state *)opaque;
switch (offset) {
case 0x08: /* LED */
s->leds = val;
break;
case 0x0c: /* OSC0 */
case 0x10: /* OSC1 */
case 0x14: /* OSC2 */
case 0x18: /* OSC3 */
case 0x1c: /* OSC4 */
/* ??? */
break;
case 0x20: /* LOCK */
if (val == LOCK_VALUE)
s->lockval = val;
else
s->lockval = val & 0x7fff;
break;
case 0x28: /* CFGDATA1 */
/* ??? Need to implement this. */
s->cfgdata1 = val;
break;
case 0x2c: /* CFGDATA2 */
/* ??? Need to implement this. */
s->cfgdata2 = val;
break;
case 0x30: /* FLAGSSET */
s->flags |= val;
break;
case 0x34: /* FLAGSCLR */
s->flags &= ~val;
break;
case 0x38: /* NVFLAGSSET */
s->nvflags |= val;
break;
case 0x3c: /* NVFLAGSCLR */
s->nvflags &= ~val;
break;
case 0x40: /* RESETCTL */
switch (board_id(s)) {
case BOARD_ID_PB926:
if (s->lockval == LOCK_VALUE) {
s->resetlevel = val;
if (val & 0x100) {
qemu_system_reset_request();
}
}
break;
case BOARD_ID_PBX:
case BOARD_ID_PBA8:
if (s->lockval == LOCK_VALUE) {
s->resetlevel = val;
if (val & 0x04) {
qemu_system_reset_request();
}
}
break;
case BOARD_ID_VEXPRESS:
case BOARD_ID_EB:
default:
/* reserved: RAZ/WI */
break;
}
break;
case 0x44: /* PCICTL */
/* nothing to do. */
break;
case 0x4c: /* FLASH */
break;
case 0x50: /* CLCD */
switch (board_id(s)) {
case BOARD_ID_PB926:
/* On 926 bits 13:8 are R/O, bits 1:0 control
* the mux that defines how to interpret the PL110
* graphics format, and other bits are r/w but we
* don't implement them to do anything.
*/
s->sys_clcd &= 0x3f00;
s->sys_clcd |= val & ~0x3f00;
qemu_set_irq(s->pl110_mux_ctrl, val & 3);
break;
case BOARD_ID_EB:
/* The EB is the same except that there is no mux since
* the EB has a PL111.
*/
s->sys_clcd &= 0x3f00;
s->sys_clcd |= val & ~0x3f00;
break;
case BOARD_ID_PBA8:
case BOARD_ID_PBX:
/* On PBA8 and PBX bit 7 is r/w and all other bits
* are either r/o or RAZ/WI.
*/
s->sys_clcd &= (1 << 7);
s->sys_clcd |= val & ~(1 << 7);
break;
case BOARD_ID_VEXPRESS:
default:
/* On VExpress this register is unimplemented and will RAZ/WI */
break;
}
break;
case 0x54: /* CLCDSER */
case 0x64: /* DMAPSR0 */
case 0x68: /* DMAPSR1 */
case 0x6c: /* DMAPSR2 */
case 0x70: /* IOSEL */
case 0x74: /* PLDCTL */
case 0x80: /* BUSID */
case 0x84: /* PROCID0 */
case 0x88: /* PROCID1 */
case 0x8c: /* OSCRESET0 */
case 0x90: /* OSCRESET1 */
case 0x94: /* OSCRESET2 */
case 0x98: /* OSCRESET3 */
case 0x9c: /* OSCRESET4 */
break;
case 0xa0: /* SYS_CFGDATA */
if (board_id(s) != BOARD_ID_VEXPRESS) {
goto bad_reg;
}
s->sys_cfgdata = val;
return;
case 0xa4: /* SYS_CFGCTRL */
if (board_id(s) != BOARD_ID_VEXPRESS) {
goto bad_reg;
}
/* Undefined bits [19:18] are RAZ/WI, and writing to
* the start bit just triggers the action; it always reads
* as zero.
*/
s->sys_cfgctrl = val & ~((3 << 18) | (1 << 31));
if (val & (1 << 31)) {
/* Start bit set -- actually do something */
unsigned int dcc = extract32(s->sys_cfgctrl, 26, 4);
unsigned int function = extract32(s->sys_cfgctrl, 20, 6);
unsigned int site = extract32(s->sys_cfgctrl, 16, 2);
unsigned int position = extract32(s->sys_cfgctrl, 12, 4);
unsigned int device = extract32(s->sys_cfgctrl, 0, 12);
s->sys_cfgstat = 1; /* complete */
if (s->sys_cfgctrl & (1 << 30)) {
if (!vexpress_cfgctrl_write(s, dcc, function, site, position,
device, s->sys_cfgdata)) {
s->sys_cfgstat |= 2; /* error */
}
} else {
uint32_t val;
if (!vexpress_cfgctrl_read(s, dcc, function, site, position,
device, &val)) {
s->sys_cfgstat |= 2; /* error */
} else {
s->sys_cfgdata = val;
}
}
}
s->sys_cfgctrl &= ~(1 << 31);
return;
case 0xa8: /* SYS_CFGSTAT */
if (board_id(s) != BOARD_ID_VEXPRESS) {
goto bad_reg;
}
s->sys_cfgstat = val & 3;
return;
default:
bad_reg:
qemu_log_mask(LOG_GUEST_ERROR,
"arm_sysctl_write: Bad register offset 0x%x\n",
(int)offset);
return;
}
}
static const MemoryRegionOps arm_sysctl_ops = {
.read = arm_sysctl_read,
.write = arm_sysctl_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
static void arm_sysctl_gpio_set(void *opaque, int line, int level)
{
arm_sysctl_state *s = (arm_sysctl_state *)opaque;
switch (line) {
case ARM_SYSCTL_GPIO_MMC_WPROT:
{
/* For PB926 and EB write-protect is bit 2 of SYS_MCI;
* for all later boards it is bit 1.
*/
int bit = 2;
if ((board_id(s) == BOARD_ID_PB926) || (board_id(s) == BOARD_ID_EB)) {
bit = 4;
}
s->sys_mci &= ~bit;
if (level) {
s->sys_mci |= bit;
}
break;
}
case ARM_SYSCTL_GPIO_MMC_CARDIN:
s->sys_mci &= ~1;
if (level) {
s->sys_mci |= 1;
}
break;
}
}
static void arm_sysctl_init(Object *obj)
{
DeviceState *dev = DEVICE(obj);
SysBusDevice *sd = SYS_BUS_DEVICE(obj);
arm_sysctl_state *s = FROM_SYSBUS(arm_sysctl_state, sd);
memory_region_init_io(&s->iomem, &arm_sysctl_ops, s, "arm-sysctl", 0x1000);
sysbus_init_mmio(sd, &s->iomem);
qdev_init_gpio_in(dev, arm_sysctl_gpio_set, 2);
qdev_init_gpio_out(dev, &s->pl110_mux_ctrl, 1);
}
static void arm_sysctl_realize(DeviceState *d, Error **errp)
{
arm_sysctl_state *s = FROM_SYSBUS(arm_sysctl_state, SYS_BUS_DEVICE(d));
s->db_clock = g_new0(uint32_t, s->db_num_clocks);
}
static void arm_sysctl_finalize(Object *obj)
{
SysBusDevice *dev = SYS_BUS_DEVICE(obj);
arm_sysctl_state *s = FROM_SYSBUS(arm_sysctl_state, dev);
g_free(s->db_voltage);
g_free(s->db_clock);
g_free(s->db_clock_reset);
}
static Property arm_sysctl_properties[] = {
DEFINE_PROP_UINT32("sys_id", arm_sysctl_state, sys_id, 0),
DEFINE_PROP_UINT32("proc_id", arm_sysctl_state, proc_id, 0),
/* Daughterboard power supply voltages (as reported via SYS_CFG) */
DEFINE_PROP_ARRAY("db-voltage", arm_sysctl_state, db_num_vsensors,
db_voltage, qdev_prop_uint32, uint32_t),
/* Daughterboard clock reset values (as reported via SYS_CFG) */
DEFINE_PROP_ARRAY("db-clock", arm_sysctl_state, db_num_clocks,
db_clock_reset, qdev_prop_uint32, uint32_t),
DEFINE_PROP_END_OF_LIST(),
};
static void arm_sysctl_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->realize = arm_sysctl_realize;
dc->reset = arm_sysctl_reset;
dc->vmsd = &vmstate_arm_sysctl;
dc->props = arm_sysctl_properties;
}
static const TypeInfo arm_sysctl_info = {
.name = "realview_sysctl",
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(arm_sysctl_state),
.instance_init = arm_sysctl_init,
.instance_finalize = arm_sysctl_finalize,
.class_init = arm_sysctl_class_init,
};
static void arm_sysctl_register_types(void)
{
type_register_static(&arm_sysctl_info);
}
type_init(arm_sysctl_register_types)
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