qemu/hw/misc/mchp_pfsoc_ioscb.c
Conor Dooley 592f0a9429 hw/{misc, riscv}: pfsoc: add system controller as unimplemented
The system controller on PolarFire SoC is access via a mailbox. The
control registers for this mailbox lie in the "IOSCB" region & the
interrupt is cleared via write to the "SYSREG" region. It also has a
QSPI controller, usually connected to a flash chip, that is used for
storing FPGA bitstreams and used for In-Application Programming (IAP).

Linux has an implementation of the system controller, through which the
hwrng is accessed, leading to load/store access faults.

Add the QSPI as unimplemented and a very basic (effectively
unimplemented) version of the system controller's mailbox. Rather than
purely marking the regions as unimplemented, service the mailbox
requests by reporting failures and raising the interrupt so a guest can
better handle the lack of support.

Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20221117225518.4102575-4-conor@kernel.org>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
2023-01-06 10:42:55 +10:00

316 lines
11 KiB
C

/*
* Microchip PolarFire SoC IOSCB module emulation
*
* Copyright (c) 2020 Wind River Systems, Inc.
*
* Author:
* Bin Meng <bin.meng@windriver.com>
*
* 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 or
* (at your option) version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* 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 "qemu/bitops.h"
#include "qemu/log.h"
#include "qapi/error.h"
#include "hw/irq.h"
#include "hw/sysbus.h"
#include "hw/misc/mchp_pfsoc_ioscb.h"
/*
* The whole IOSCB module registers map into the system address at 0x3000_0000,
* named as "System Port 0 (AXI-D0)".
*/
#define IOSCB_WHOLE_REG_SIZE 0x10000000
#define IOSCB_SUBMOD_REG_SIZE 0x1000
#define IOSCB_CCC_REG_SIZE 0x2000000
#define IOSCB_CTRL_REG_SIZE 0x800
#define IOSCB_QSPIXIP_REG_SIZE 0x200
/*
* There are many sub-modules in the IOSCB module.
* See Microchip PolarFire SoC documentation (Register_Map.zip),
* Register Map/PF_SoC_RegMap_V1_1/MPFS250T/mpfs250t_ioscb_memmap_dri.htm
*
* The following are sub-modules offsets that are of concern.
*/
#define IOSCB_LANE01_BASE 0x06500000
#define IOSCB_LANE23_BASE 0x06510000
#define IOSCB_CTRL_BASE 0x07020000
#define IOSCB_QSPIXIP_BASE 0x07020100
#define IOSCB_MAILBOX_BASE 0x07020800
#define IOSCB_CFG_BASE 0x07080000
#define IOSCB_CCC_BASE 0x08000000
#define IOSCB_PLL_MSS_BASE 0x0E001000
#define IOSCB_CFM_MSS_BASE 0x0E002000
#define IOSCB_PLL_DDR_BASE 0x0E010000
#define IOSCB_BC_DDR_BASE 0x0E020000
#define IOSCB_IO_CALIB_DDR_BASE 0x0E040000
#define IOSCB_PLL_SGMII_BASE 0x0E080000
#define IOSCB_DLL_SGMII_BASE 0x0E100000
#define IOSCB_CFM_SGMII_BASE 0x0E200000
#define IOSCB_BC_SGMII_BASE 0x0E400000
#define IOSCB_IO_CALIB_SGMII_BASE 0x0E800000
static uint64_t mchp_pfsoc_dummy_read(void *opaque, hwaddr offset,
unsigned size)
{
qemu_log_mask(LOG_UNIMP, "%s: unimplemented device read "
"(size %d, offset 0x%" HWADDR_PRIx ")\n",
__func__, size, offset);
return 0;
}
static void mchp_pfsoc_dummy_write(void *opaque, hwaddr offset,
uint64_t value, unsigned size)
{
qemu_log_mask(LOG_UNIMP, "%s: unimplemented device write "
"(size %d, value 0x%" PRIx64
", offset 0x%" HWADDR_PRIx ")\n",
__func__, size, value, offset);
}
static const MemoryRegionOps mchp_pfsoc_dummy_ops = {
.read = mchp_pfsoc_dummy_read,
.write = mchp_pfsoc_dummy_write,
.endianness = DEVICE_LITTLE_ENDIAN,
};
/* All PLL modules in IOSCB have the same register layout */
#define PLL_CTRL 0x04
static uint64_t mchp_pfsoc_pll_read(void *opaque, hwaddr offset,
unsigned size)
{
uint32_t val = 0;
switch (offset) {
case PLL_CTRL:
/* PLL is locked */
val = BIT(25);
break;
default:
qemu_log_mask(LOG_UNIMP, "%s: unimplemented device read "
"(size %d, offset 0x%" HWADDR_PRIx ")\n",
__func__, size, offset);
break;
}
return val;
}
static const MemoryRegionOps mchp_pfsoc_pll_ops = {
.read = mchp_pfsoc_pll_read,
.write = mchp_pfsoc_dummy_write,
.endianness = DEVICE_LITTLE_ENDIAN,
};
/* IO_CALIB_DDR submodule */
#define IO_CALIB_DDR_IOC_REG1 0x08
static uint64_t mchp_pfsoc_io_calib_ddr_read(void *opaque, hwaddr offset,
unsigned size)
{
uint32_t val = 0;
switch (offset) {
case IO_CALIB_DDR_IOC_REG1:
/* calibration completed */
val = BIT(2);
break;
default:
qemu_log_mask(LOG_UNIMP, "%s: unimplemented device read "
"(size %d, offset 0x%" HWADDR_PRIx ")\n",
__func__, size, offset);
break;
}
return val;
}
static const MemoryRegionOps mchp_pfsoc_io_calib_ddr_ops = {
.read = mchp_pfsoc_io_calib_ddr_read,
.write = mchp_pfsoc_dummy_write,
.endianness = DEVICE_LITTLE_ENDIAN,
};
#define SERVICES_CR 0x50
#define SERVICES_SR 0x54
#define SERVICES_STATUS_SHIFT 16
static uint64_t mchp_pfsoc_ctrl_read(void *opaque, hwaddr offset,
unsigned size)
{
uint32_t val = 0;
switch (offset) {
case SERVICES_SR:
/*
* Although some services have no error codes, most do. All services
* that do implement errors, begin their error codes at 1. Treat all
* service requests as failures & return 1.
* See the "PolarFire® FPGA and PolarFire SoC FPGA System Services"
* user guide for more information on service error codes.
*/
val = 1u << SERVICES_STATUS_SHIFT;
break;
default:
qemu_log_mask(LOG_UNIMP, "%s: unimplemented device read "
"(size %d, offset 0x%" HWADDR_PRIx ")\n",
__func__, size, offset);
}
return val;
}
static void mchp_pfsoc_ctrl_write(void *opaque, hwaddr offset,
uint64_t value, unsigned size)
{
MchpPfSoCIoscbState *s = opaque;
switch (offset) {
case SERVICES_CR:
qemu_irq_raise(s->irq);
break;
default:
qemu_log_mask(LOG_UNIMP, "%s: unimplemented device write "
"(size %d, value 0x%" PRIx64
", offset 0x%" HWADDR_PRIx ")\n",
__func__, size, value, offset);
}
}
static const MemoryRegionOps mchp_pfsoc_ctrl_ops = {
.read = mchp_pfsoc_ctrl_read,
.write = mchp_pfsoc_ctrl_write,
.endianness = DEVICE_LITTLE_ENDIAN,
};
static void mchp_pfsoc_ioscb_realize(DeviceState *dev, Error **errp)
{
MchpPfSoCIoscbState *s = MCHP_PFSOC_IOSCB(dev);
SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
memory_region_init(&s->container, OBJECT(s),
"mchp.pfsoc.ioscb", IOSCB_WHOLE_REG_SIZE);
sysbus_init_mmio(sbd, &s->container);
/* add subregions for all sub-modules in IOSCB */
memory_region_init_io(&s->lane01, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
"mchp.pfsoc.ioscb.lane01", IOSCB_SUBMOD_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_LANE01_BASE, &s->lane01);
memory_region_init_io(&s->lane23, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
"mchp.pfsoc.ioscb.lane23", IOSCB_SUBMOD_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_LANE23_BASE, &s->lane23);
memory_region_init_io(&s->ctrl, OBJECT(s), &mchp_pfsoc_ctrl_ops, s,
"mchp.pfsoc.ioscb.ctrl", IOSCB_CTRL_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_CTRL_BASE, &s->ctrl);
memory_region_init_io(&s->qspixip, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
"mchp.pfsoc.ioscb.qspixip", IOSCB_QSPIXIP_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_QSPIXIP_BASE, &s->qspixip);
memory_region_init_io(&s->mailbox, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
"mchp.pfsoc.ioscb.mailbox", IOSCB_SUBMOD_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_MAILBOX_BASE, &s->mailbox);
memory_region_init_io(&s->cfg, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
"mchp.pfsoc.ioscb.cfg", IOSCB_SUBMOD_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_CFG_BASE, &s->cfg);
memory_region_init_io(&s->ccc, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
"mchp.pfsoc.ioscb.ccc", IOSCB_CCC_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_CCC_BASE, &s->ccc);
memory_region_init_io(&s->pll_mss, OBJECT(s), &mchp_pfsoc_pll_ops, s,
"mchp.pfsoc.ioscb.pll_mss", IOSCB_SUBMOD_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_PLL_MSS_BASE, &s->pll_mss);
memory_region_init_io(&s->cfm_mss, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
"mchp.pfsoc.ioscb.cfm_mss", IOSCB_SUBMOD_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_CFM_MSS_BASE, &s->cfm_mss);
memory_region_init_io(&s->pll_ddr, OBJECT(s), &mchp_pfsoc_pll_ops, s,
"mchp.pfsoc.ioscb.pll_ddr", IOSCB_SUBMOD_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_PLL_DDR_BASE, &s->pll_ddr);
memory_region_init_io(&s->bc_ddr, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
"mchp.pfsoc.ioscb.bc_ddr", IOSCB_SUBMOD_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_BC_DDR_BASE, &s->bc_ddr);
memory_region_init_io(&s->io_calib_ddr, OBJECT(s),
&mchp_pfsoc_io_calib_ddr_ops, s,
"mchp.pfsoc.ioscb.io_calib_ddr",
IOSCB_SUBMOD_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_IO_CALIB_DDR_BASE,
&s->io_calib_ddr);
memory_region_init_io(&s->pll_sgmii, OBJECT(s), &mchp_pfsoc_pll_ops, s,
"mchp.pfsoc.ioscb.pll_sgmii", IOSCB_SUBMOD_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_PLL_SGMII_BASE,
&s->pll_sgmii);
memory_region_init_io(&s->dll_sgmii, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
"mchp.pfsoc.ioscb.dll_sgmii", IOSCB_SUBMOD_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_DLL_SGMII_BASE,
&s->dll_sgmii);
memory_region_init_io(&s->cfm_sgmii, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
"mchp.pfsoc.ioscb.cfm_sgmii", IOSCB_SUBMOD_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_CFM_SGMII_BASE,
&s->cfm_sgmii);
memory_region_init_io(&s->bc_sgmii, OBJECT(s), &mchp_pfsoc_dummy_ops, s,
"mchp.pfsoc.ioscb.bc_sgmii", IOSCB_SUBMOD_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_BC_SGMII_BASE,
&s->bc_sgmii);
memory_region_init_io(&s->io_calib_sgmii, OBJECT(s), &mchp_pfsoc_dummy_ops,
s, "mchp.pfsoc.ioscb.io_calib_sgmii",
IOSCB_SUBMOD_REG_SIZE);
memory_region_add_subregion(&s->container, IOSCB_IO_CALIB_SGMII_BASE,
&s->io_calib_sgmii);
sysbus_init_irq(SYS_BUS_DEVICE(dev), &s->irq);
}
static void mchp_pfsoc_ioscb_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->desc = "Microchip PolarFire SoC IOSCB modules";
dc->realize = mchp_pfsoc_ioscb_realize;
}
static const TypeInfo mchp_pfsoc_ioscb_info = {
.name = TYPE_MCHP_PFSOC_IOSCB,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(MchpPfSoCIoscbState),
.class_init = mchp_pfsoc_ioscb_class_init,
};
static void mchp_pfsoc_ioscb_register_types(void)
{
type_register_static(&mchp_pfsoc_ioscb_info);
}
type_init(mchp_pfsoc_ioscb_register_types)