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qemu/hw/misc/zynq_slcr.c
Sebastian Huber 69991d7dcb arm/zynq: Add software system reset via SCLR 
Support software-driven system reset via the register in the SCLR.

Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
Reviewed-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-02-08 14:50:48 +00:00

545 lines
15 KiB
C
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/*
* Status and system control registers for Xilinx Zynq Platform
*
* Copyright (c) 2011 Michal Simek <monstr@monstr.eu>
* Copyright (c) 2012 PetaLogix Pty Ltd.
* Based on hw/arm_sysctl.c, written by Paul Brook
*
* 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 "hw/hw.h"
#include "qemu/timer.h"
#include "hw/sysbus.h"
#include "sysemu/sysemu.h"
#ifdef ZYNQ_ARM_SLCR_ERR_DEBUG
#define DB_PRINT(...) do { \
fprintf(stderr, ": %s: ", __func__); \
fprintf(stderr, ## __VA_ARGS__); \
} while (0);
#else
#define DB_PRINT(...)
#endif
#define XILINX_LOCK_KEY 0x767b
#define XILINX_UNLOCK_KEY 0xdf0d
#define R_PSS_RST_CTRL_SOFT_RST 0x1
typedef enum {
ARM_PLL_CTRL,
DDR_PLL_CTRL,
IO_PLL_CTRL,
PLL_STATUS,
ARM_PPL_CFG,
DDR_PLL_CFG,
IO_PLL_CFG,
PLL_BG_CTRL,
PLL_MAX
} PLLValues;
typedef enum {
ARM_CLK_CTRL,
DDR_CLK_CTRL,
DCI_CLK_CTRL,
APER_CLK_CTRL,
USB0_CLK_CTRL,
USB1_CLK_CTRL,
GEM0_RCLK_CTRL,
GEM1_RCLK_CTRL,
GEM0_CLK_CTRL,
GEM1_CLK_CTRL,
SMC_CLK_CTRL,
LQSPI_CLK_CTRL,
SDIO_CLK_CTRL,
UART_CLK_CTRL,
SPI_CLK_CTRL,
CAN_CLK_CTRL,
CAN_MIOCLK_CTRL,
DBG_CLK_CTRL,
PCAP_CLK_CTRL,
TOPSW_CLK_CTRL,
CLK_MAX
} ClkValues;
typedef enum {
CLK_CTRL,
THR_CTRL,
THR_CNT,
THR_STA,
FPGA_MAX
} FPGAValues;
typedef enum {
SYNC_CTRL,
SYNC_STATUS,
BANDGAP_TRIP,
CC_TEST,
PLL_PREDIVISOR,
CLK_621_TRUE,
PICTURE_DBG,
PICTURE_DBG_UCNT,
PICTURE_DBG_LCNT,
MISC_MAX
} MiscValues;
typedef enum {
PSS,
DDDR,
DMAC = 3,
USB,
GEM,
SDIO,
SPI,
CAN,
I2C,
UART,
GPIO,
LQSPI,
SMC,
OCM,
DEVCI,
FPGA,
A9_CPU,
RS_AWDT,
RST_REASON,
RST_REASON_CLR,
REBOOT_STATUS,
BOOT_MODE,
RESET_MAX
} ResetValues;
#define TYPE_ZYNQ_SLCR "xilinx,zynq_slcr"
#define ZYNQ_SLCR(obj) OBJECT_CHECK(ZynqSLCRState, (obj), TYPE_ZYNQ_SLCR)
typedef struct ZynqSLCRState {
SysBusDevice parent_obj;
MemoryRegion iomem;
union {
struct {
uint16_t scl;
uint16_t lockval;
uint32_t pll[PLL_MAX]; /* 0x100 - 0x11C */
uint32_t clk[CLK_MAX]; /* 0x120 - 0x16C */
uint32_t fpga[4][FPGA_MAX]; /* 0x170 - 0x1AC */
uint32_t misc[MISC_MAX]; /* 0x1B0 - 0x1D8 */
uint32_t reset[RESET_MAX]; /* 0x200 - 0x25C */
uint32_t apu_ctrl; /* 0x300 */
uint32_t wdt_clk_sel; /* 0x304 */
uint32_t tz_ocm[3]; /* 0x400 - 0x408 */
uint32_t tz_ddr; /* 0x430 */
uint32_t tz_dma[3]; /* 0x440 - 0x448 */
uint32_t tz_misc[3]; /* 0x450 - 0x458 */
uint32_t tz_fpga[2]; /* 0x484 - 0x488 */
uint32_t dbg_ctrl; /* 0x500 */
uint32_t pss_idcode; /* 0x530 */
uint32_t ddr[8]; /* 0x600 - 0x620 - 0x604-missing */
uint32_t mio[54]; /* 0x700 - 0x7D4 */
uint32_t mio_func[4]; /* 0x800 - 0x810 */
uint32_t sd[2]; /* 0x830 - 0x834 */
uint32_t lvl_shftr_en; /* 0x900 */
uint32_t ocm_cfg; /* 0x910 */
uint32_t cpu_ram[8]; /* 0xA00 - 0xA1C */
uint32_t iou[7]; /* 0xA30 - 0xA48 */
uint32_t dmac_ram; /* 0xA50 */
uint32_t afi[4][3]; /* 0xA60 - 0xA8C */
uint32_t ocm[3]; /* 0xA90 - 0xA98 */
uint32_t devci_ram; /* 0xAA0 */
uint32_t csg_ram; /* 0xAB0 */
uint32_t gpiob[12]; /* 0xB00 - 0xB2C */
uint32_t ddriob[14]; /* 0xB40 - 0xB74 */
};
uint8_t data[0x1000];
};
} ZynqSLCRState;
static void zynq_slcr_reset(DeviceState *d)
{
ZynqSLCRState *s = ZYNQ_SLCR(d);
int i;
DB_PRINT("RESET\n");
s->lockval = 1;
/* 0x100 - 0x11C */
s->pll[ARM_PLL_CTRL] = 0x0001A008;
s->pll[DDR_PLL_CTRL] = 0x0001A008;
s->pll[IO_PLL_CTRL] = 0x0001A008;
s->pll[PLL_STATUS] = 0x0000003F;
s->pll[ARM_PPL_CFG] = 0x00014000;
s->pll[DDR_PLL_CFG] = 0x00014000;
s->pll[IO_PLL_CFG] = 0x00014000;
/* 0x120 - 0x16C */
s->clk[ARM_CLK_CTRL] = 0x1F000400;
s->clk[DDR_CLK_CTRL] = 0x18400003;
s->clk[DCI_CLK_CTRL] = 0x01E03201;
s->clk[APER_CLK_CTRL] = 0x01FFCCCD;
s->clk[USB0_CLK_CTRL] = s->clk[USB1_CLK_CTRL] = 0x00101941;
s->clk[GEM0_RCLK_CTRL] = s->clk[GEM1_RCLK_CTRL] = 0x00000001;
s->clk[GEM0_CLK_CTRL] = s->clk[GEM1_CLK_CTRL] = 0x00003C01;
s->clk[SMC_CLK_CTRL] = 0x00003C01;
s->clk[LQSPI_CLK_CTRL] = 0x00002821;
s->clk[SDIO_CLK_CTRL] = 0x00001E03;
s->clk[UART_CLK_CTRL] = 0x00003F03;
s->clk[SPI_CLK_CTRL] = 0x00003F03;
s->clk[CAN_CLK_CTRL] = 0x00501903;
s->clk[DBG_CLK_CTRL] = 0x00000F03;
s->clk[PCAP_CLK_CTRL] = 0x00000F01;
/* 0x170 - 0x1AC */
s->fpga[0][CLK_CTRL] = s->fpga[1][CLK_CTRL] = s->fpga[2][CLK_CTRL] =
s->fpga[3][CLK_CTRL] = 0x00101800;
s->fpga[0][THR_STA] = s->fpga[1][THR_STA] = s->fpga[2][THR_STA] =
s->fpga[3][THR_STA] = 0x00010000;
/* 0x1B0 - 0x1D8 */
s->misc[BANDGAP_TRIP] = 0x0000001F;
s->misc[PLL_PREDIVISOR] = 0x00000001;
s->misc[CLK_621_TRUE] = 0x00000001;
/* 0x200 - 0x25C */
s->reset[FPGA] = 0x01F33F0F;
s->reset[RST_REASON] = 0x00000040;
/* 0x700 - 0x7D4 */
for (i = 0; i < 54; i++) {
s->mio[i] = 0x00001601;
}
for (i = 2; i <= 8; i++) {
s->mio[i] = 0x00000601;
}
/* MIO_MST_TRI0, MIO_MST_TRI1 */
s->mio_func[2] = s->mio_func[3] = 0xFFFFFFFF;
s->cpu_ram[0] = s->cpu_ram[1] = s->cpu_ram[3] =
s->cpu_ram[4] = s->cpu_ram[7] = 0x00010101;
s->cpu_ram[2] = s->cpu_ram[5] = 0x01010101;
s->cpu_ram[6] = 0x00000001;
s->iou[0] = s->iou[1] = s->iou[2] = s->iou[3] = 0x09090909;
s->iou[4] = s->iou[5] = 0x00090909;
s->iou[6] = 0x00000909;
s->dmac_ram = 0x00000009;
s->afi[0][0] = s->afi[0][1] = 0x09090909;
s->afi[1][0] = s->afi[1][1] = 0x09090909;
s->afi[2][0] = s->afi[2][1] = 0x09090909;
s->afi[3][0] = s->afi[3][1] = 0x09090909;
s->afi[0][2] = s->afi[1][2] = s->afi[2][2] = s->afi[3][2] = 0x00000909;
s->ocm[0] = 0x01010101;
s->ocm[1] = s->ocm[2] = 0x09090909;
s->devci_ram = 0x00000909;
s->csg_ram = 0x00000001;
s->ddriob[0] = s->ddriob[1] = s->ddriob[2] = s->ddriob[3] = 0x00000e00;
s->ddriob[4] = s->ddriob[5] = s->ddriob[6] = 0x00000e00;
s->ddriob[12] = 0x00000021;
}
static inline uint32_t zynq_slcr_read_imp(void *opaque,
hwaddr offset)
{
ZynqSLCRState *s = (ZynqSLCRState *)opaque;
switch (offset) {
case 0x0: /* SCL */
return s->scl;
case 0x4: /* LOCK */
case 0x8: /* UNLOCK */
DB_PRINT("Reading SCLR_LOCK/UNLOCK is not enabled\n");
return 0;
case 0x0C: /* LOCKSTA */
return s->lockval;
case 0x100 ... 0x11C:
return s->pll[(offset - 0x100) / 4];
case 0x120 ... 0x16C:
return s->clk[(offset - 0x120) / 4];
case 0x170 ... 0x1AC:
return s->fpga[0][(offset - 0x170) / 4];
case 0x1B0 ... 0x1D8:
return s->misc[(offset - 0x1B0) / 4];
case 0x200 ... 0x258:
return s->reset[(offset - 0x200) / 4];
case 0x25c:
return 1;
case 0x300:
return s->apu_ctrl;
case 0x304:
return s->wdt_clk_sel;
case 0x400 ... 0x408:
return s->tz_ocm[(offset - 0x400) / 4];
case 0x430:
return s->tz_ddr;
case 0x440 ... 0x448:
return s->tz_dma[(offset - 0x440) / 4];
case 0x450 ... 0x458:
return s->tz_misc[(offset - 0x450) / 4];
case 0x484 ... 0x488:
return s->tz_fpga[(offset - 0x484) / 4];
case 0x500:
return s->dbg_ctrl;
case 0x530:
return s->pss_idcode;
case 0x600 ... 0x620:
if (offset == 0x604) {
goto bad_reg;
}
return s->ddr[(offset - 0x600) / 4];
case 0x700 ... 0x7D4:
return s->mio[(offset - 0x700) / 4];
case 0x800 ... 0x810:
return s->mio_func[(offset - 0x800) / 4];
case 0x830 ... 0x834:
return s->sd[(offset - 0x830) / 4];
case 0x900:
return s->lvl_shftr_en;
case 0x910:
return s->ocm_cfg;
case 0xA00 ... 0xA1C:
return s->cpu_ram[(offset - 0xA00) / 4];
case 0xA30 ... 0xA48:
return s->iou[(offset - 0xA30) / 4];
case 0xA50:
return s->dmac_ram;
case 0xA60 ... 0xA8C:
return s->afi[0][(offset - 0xA60) / 4];
case 0xA90 ... 0xA98:
return s->ocm[(offset - 0xA90) / 4];
case 0xAA0:
return s->devci_ram;
case 0xAB0:
return s->csg_ram;
case 0xB00 ... 0xB2C:
return s->gpiob[(offset - 0xB00) / 4];
case 0xB40 ... 0xB74:
return s->ddriob[(offset - 0xB40) / 4];
default:
bad_reg:
DB_PRINT("Bad register offset 0x%x\n", (int)offset);
return 0;
}
}
static uint64_t zynq_slcr_read(void *opaque, hwaddr offset,
unsigned size)
{
uint32_t ret = zynq_slcr_read_imp(opaque, offset);
DB_PRINT("addr: %08x data: %08x\n", (unsigned)offset, (unsigned)ret);
return ret;
}
static void zynq_slcr_write(void *opaque, hwaddr offset,
uint64_t val, unsigned size)
{
ZynqSLCRState *s = (ZynqSLCRState *)opaque;
DB_PRINT("offset: %08x data: %08x\n", (unsigned)offset, (unsigned)val);
switch (offset) {
case 0x00: /* SCL */
s->scl = val & 0x1;
return;
case 0x4: /* SLCR_LOCK */
if ((val & 0xFFFF) == XILINX_LOCK_KEY) {
DB_PRINT("XILINX LOCK 0xF8000000 + 0x%x <= 0x%x\n", (int)offset,
(unsigned)val & 0xFFFF);
s->lockval = 1;
} else {
DB_PRINT("WRONG XILINX LOCK KEY 0xF8000000 + 0x%x <= 0x%x\n",
(int)offset, (unsigned)val & 0xFFFF);
}
return;
case 0x8: /* SLCR_UNLOCK */
if ((val & 0xFFFF) == XILINX_UNLOCK_KEY) {
DB_PRINT("XILINX UNLOCK 0xF8000000 + 0x%x <= 0x%x\n", (int)offset,
(unsigned)val & 0xFFFF);
s->lockval = 0;
} else {
DB_PRINT("WRONG XILINX UNLOCK KEY 0xF8000000 + 0x%x <= 0x%x\n",
(int)offset, (unsigned)val & 0xFFFF);
}
return;
case 0xc: /* LOCKSTA */
DB_PRINT("Writing SCLR_LOCKSTA is not enabled\n");
return;
}
if (!s->lockval) {
switch (offset) {
case 0x100 ... 0x11C:
if (offset == 0x10C) {
goto bad_reg;
}
s->pll[(offset - 0x100) / 4] = val;
break;
case 0x120 ... 0x16C:
s->clk[(offset - 0x120) / 4] = val;
break;
case 0x170 ... 0x1AC:
s->fpga[0][(offset - 0x170) / 4] = val;
break;
case 0x1B0 ... 0x1D8:
s->misc[(offset - 0x1B0) / 4] = val;
break;
case 0x200 ... 0x25C:
if (offset == 0x250) {
goto bad_reg;
}
s->reset[(offset - 0x200) / 4] = val;
if (offset == 0x200 && (val & R_PSS_RST_CTRL_SOFT_RST)) {
qemu_system_reset_request();
}
break;
case 0x300:
s->apu_ctrl = val;
break;
case 0x304:
s->wdt_clk_sel = val;
break;
case 0x400 ... 0x408:
s->tz_ocm[(offset - 0x400) / 4] = val;
break;
case 0x430:
s->tz_ddr = val;
break;
case 0x440 ... 0x448:
s->tz_dma[(offset - 0x440) / 4] = val;
break;
case 0x450 ... 0x458:
s->tz_misc[(offset - 0x450) / 4] = val;
break;
case 0x484 ... 0x488:
s->tz_fpga[(offset - 0x484) / 4] = val;
break;
case 0x500:
s->dbg_ctrl = val;
break;
case 0x530:
s->pss_idcode = val;
break;
case 0x600 ... 0x620:
if (offset == 0x604) {
goto bad_reg;
}
s->ddr[(offset - 0x600) / 4] = val;
break;
case 0x700 ... 0x7D4:
s->mio[(offset - 0x700) / 4] = val;
break;
case 0x800 ... 0x810:
s->mio_func[(offset - 0x800) / 4] = val;
break;
case 0x830 ... 0x834:
s->sd[(offset - 0x830) / 4] = val;
break;
case 0x900:
s->lvl_shftr_en = val;
break;
case 0x910:
break;
case 0xA00 ... 0xA1C:
s->cpu_ram[(offset - 0xA00) / 4] = val;
break;
case 0xA30 ... 0xA48:
s->iou[(offset - 0xA30) / 4] = val;
break;
case 0xA50:
s->dmac_ram = val;
break;
case 0xA60 ... 0xA8C:
s->afi[0][(offset - 0xA60) / 4] = val;
break;
case 0xA90:
s->ocm[0] = val;
break;
case 0xAA0:
s->devci_ram = val;
break;
case 0xAB0:
s->csg_ram = val;
break;
case 0xB00 ... 0xB2C:
if (offset == 0xB20 || offset == 0xB2C) {
goto bad_reg;
}
s->gpiob[(offset - 0xB00) / 4] = val;
break;
case 0xB40 ... 0xB74:
s->ddriob[(offset - 0xB40) / 4] = val;
break;
default:
bad_reg:
DB_PRINT("Bad register write %x <= %08x\n", (int)offset,
(unsigned)val);
}
} else {
DB_PRINT("SCLR registers are locked. Unlock them first\n");
}
}
static const MemoryRegionOps slcr_ops = {
.read = zynq_slcr_read,
.write = zynq_slcr_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
static int zynq_slcr_init(SysBusDevice *dev)
{
ZynqSLCRState *s = ZYNQ_SLCR(dev);
memory_region_init_io(&s->iomem, OBJECT(s), &slcr_ops, s, "slcr", 0x1000);
sysbus_init_mmio(dev, &s->iomem);
return 0;
}
static const VMStateDescription vmstate_zynq_slcr = {
.name = "zynq_slcr",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT8_ARRAY(data, ZynqSLCRState, 0x1000),
VMSTATE_END_OF_LIST()
}
};
static void zynq_slcr_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(klass);
sdc->init = zynq_slcr_init;
dc->vmsd = &vmstate_zynq_slcr;
dc->reset = zynq_slcr_reset;
}
static const TypeInfo zynq_slcr_info = {
.class_init = zynq_slcr_class_init,
.name = TYPE_ZYNQ_SLCR,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(ZynqSLCRState),
};
static void zynq_slcr_register_types(void)
{
type_register_static(&zynq_slcr_info);
}
type_init(zynq_slcr_register_types)
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