| /* |
| * ARM IoTKit system control element |
| * |
| * Copyright (c) 2018 Linaro Limited |
| * Written by Peter Maydell |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 or |
| * (at your option) any later version. |
| */ |
| |
| /* |
| * This is a model of the "system control element" which is part of the |
| * Arm IoTKit and documented in |
| * http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ecm0601256/index.html |
| * Specifically, it implements the "system control register" blocks. |
| */ |
| |
| #include "qemu/osdep.h" |
| #include "qemu/bitops.h" |
| #include "qemu/log.h" |
| #include "qemu/module.h" |
| #include "sysemu/runstate.h" |
| #include "trace.h" |
| #include "qapi/error.h" |
| #include "hw/sysbus.h" |
| #include "migration/vmstate.h" |
| #include "hw/registerfields.h" |
| #include "hw/misc/iotkit-sysctl.h" |
| #include "hw/qdev-properties.h" |
| #include "target/arm/arm-powerctl.h" |
| #include "target/arm/cpu.h" |
| |
| REG32(SECDBGSTAT, 0x0) |
| REG32(SECDBGSET, 0x4) |
| REG32(SECDBGCLR, 0x8) |
| REG32(SCSECCTRL, 0xc) |
| REG32(FCLK_DIV, 0x10) |
| REG32(SYSCLK_DIV, 0x14) |
| REG32(CLOCK_FORCE, 0x18) |
| REG32(RESET_SYNDROME, 0x100) |
| REG32(RESET_MASK, 0x104) |
| REG32(SWRESET, 0x108) |
| FIELD(SWRESET, SWRESETREQ, 9, 1) |
| REG32(GRETREG, 0x10c) |
| REG32(INITSVTOR0, 0x110) |
| REG32(INITSVTOR1, 0x114) |
| REG32(CPUWAIT, 0x118) |
| REG32(NMI_ENABLE, 0x11c) /* BUSWAIT in IoTKit */ |
| REG32(WICCTRL, 0x120) |
| REG32(EWCTRL, 0x124) |
| REG32(PDCM_PD_SYS_SENSE, 0x200) |
| REG32(PDCM_PD_SRAM0_SENSE, 0x20c) |
| REG32(PDCM_PD_SRAM1_SENSE, 0x210) |
| REG32(PDCM_PD_SRAM2_SENSE, 0x214) |
| REG32(PDCM_PD_SRAM3_SENSE, 0x218) |
| REG32(PID4, 0xfd0) |
| REG32(PID5, 0xfd4) |
| REG32(PID6, 0xfd8) |
| REG32(PID7, 0xfdc) |
| REG32(PID0, 0xfe0) |
| REG32(PID1, 0xfe4) |
| REG32(PID2, 0xfe8) |
| REG32(PID3, 0xfec) |
| REG32(CID0, 0xff0) |
| REG32(CID1, 0xff4) |
| REG32(CID2, 0xff8) |
| REG32(CID3, 0xffc) |
| |
| /* PID/CID values */ |
| static const int sysctl_id[] = { |
| 0x04, 0x00, 0x00, 0x00, /* PID4..PID7 */ |
| 0x54, 0xb8, 0x0b, 0x00, /* PID0..PID3 */ |
| 0x0d, 0xf0, 0x05, 0xb1, /* CID0..CID3 */ |
| }; |
| |
| /* |
| * Set the initial secure vector table offset address for the core. |
| * This will take effect when the CPU next resets. |
| */ |
| static void set_init_vtor(uint64_t cpuid, uint32_t vtor) |
| { |
| Object *cpuobj = OBJECT(arm_get_cpu_by_id(cpuid)); |
| |
| if (cpuobj) { |
| if (object_property_find(cpuobj, "init-svtor", NULL)) { |
| object_property_set_uint(cpuobj, vtor, "init-svtor", &error_abort); |
| } |
| } |
| } |
| |
| static uint64_t iotkit_sysctl_read(void *opaque, hwaddr offset, |
| unsigned size) |
| { |
| IoTKitSysCtl *s = IOTKIT_SYSCTL(opaque); |
| uint64_t r; |
| |
| switch (offset) { |
| case A_SECDBGSTAT: |
| r = s->secure_debug; |
| break; |
| case A_SCSECCTRL: |
| if (!s->is_sse200) { |
| goto bad_offset; |
| } |
| r = s->scsecctrl; |
| break; |
| case A_FCLK_DIV: |
| if (!s->is_sse200) { |
| goto bad_offset; |
| } |
| r = s->fclk_div; |
| break; |
| case A_SYSCLK_DIV: |
| if (!s->is_sse200) { |
| goto bad_offset; |
| } |
| r = s->sysclk_div; |
| break; |
| case A_CLOCK_FORCE: |
| if (!s->is_sse200) { |
| goto bad_offset; |
| } |
| r = s->clock_force; |
| break; |
| case A_RESET_SYNDROME: |
| r = s->reset_syndrome; |
| break; |
| case A_RESET_MASK: |
| r = s->reset_mask; |
| break; |
| case A_GRETREG: |
| r = s->gretreg; |
| break; |
| case A_INITSVTOR0: |
| r = s->initsvtor0; |
| break; |
| case A_INITSVTOR1: |
| if (!s->is_sse200) { |
| goto bad_offset; |
| } |
| r = s->initsvtor1; |
| break; |
| case A_CPUWAIT: |
| r = s->cpuwait; |
| break; |
| case A_NMI_ENABLE: |
| /* In IoTKit this is named BUSWAIT but is marked reserved, R/O, zero */ |
| if (!s->is_sse200) { |
| r = 0; |
| break; |
| } |
| r = s->nmi_enable; |
| break; |
| case A_WICCTRL: |
| r = s->wicctrl; |
| break; |
| case A_EWCTRL: |
| if (!s->is_sse200) { |
| goto bad_offset; |
| } |
| r = s->ewctrl; |
| break; |
| case A_PDCM_PD_SYS_SENSE: |
| if (!s->is_sse200) { |
| goto bad_offset; |
| } |
| r = s->pdcm_pd_sys_sense; |
| break; |
| case A_PDCM_PD_SRAM0_SENSE: |
| if (!s->is_sse200) { |
| goto bad_offset; |
| } |
| r = s->pdcm_pd_sram0_sense; |
| break; |
| case A_PDCM_PD_SRAM1_SENSE: |
| if (!s->is_sse200) { |
| goto bad_offset; |
| } |
| r = s->pdcm_pd_sram1_sense; |
| break; |
| case A_PDCM_PD_SRAM2_SENSE: |
| if (!s->is_sse200) { |
| goto bad_offset; |
| } |
| r = s->pdcm_pd_sram2_sense; |
| break; |
| case A_PDCM_PD_SRAM3_SENSE: |
| if (!s->is_sse200) { |
| goto bad_offset; |
| } |
| r = s->pdcm_pd_sram3_sense; |
| break; |
| case A_PID4 ... A_CID3: |
| r = sysctl_id[(offset - A_PID4) / 4]; |
| break; |
| case A_SECDBGSET: |
| case A_SECDBGCLR: |
| case A_SWRESET: |
| qemu_log_mask(LOG_GUEST_ERROR, |
| "IoTKit SysCtl read: read of WO offset %x\n", |
| (int)offset); |
| r = 0; |
| break; |
| default: |
| bad_offset: |
| qemu_log_mask(LOG_GUEST_ERROR, |
| "IoTKit SysCtl read: bad offset %x\n", (int)offset); |
| r = 0; |
| break; |
| } |
| trace_iotkit_sysctl_read(offset, r, size); |
| return r; |
| } |
| |
| static void iotkit_sysctl_write(void *opaque, hwaddr offset, |
| uint64_t value, unsigned size) |
| { |
| IoTKitSysCtl *s = IOTKIT_SYSCTL(opaque); |
| |
| trace_iotkit_sysctl_write(offset, value, size); |
| |
| /* |
| * Most of the state here has to do with control of reset and |
| * similar kinds of power up -- for instance the guest can ask |
| * what the reason for the last reset was, or forbid reset for |
| * some causes (like the non-secure watchdog). Most of this is |
| * not relevant to QEMU, which doesn't really model anything other |
| * than a full power-on reset. |
| * We just model the registers as reads-as-written. |
| */ |
| |
| switch (offset) { |
| case A_RESET_SYNDROME: |
| qemu_log_mask(LOG_UNIMP, |
| "IoTKit SysCtl RESET_SYNDROME unimplemented\n"); |
| s->reset_syndrome = value; |
| break; |
| case A_RESET_MASK: |
| qemu_log_mask(LOG_UNIMP, "IoTKit SysCtl RESET_MASK unimplemented\n"); |
| s->reset_mask = value; |
| break; |
| case A_GRETREG: |
| /* |
| * General retention register, which is only reset by a power-on |
| * reset. Technically this implementation is complete, since |
| * QEMU only supports power-on resets... |
| */ |
| s->gretreg = value; |
| break; |
| case A_INITSVTOR0: |
| s->initsvtor0 = value; |
| set_init_vtor(0, s->initsvtor0); |
| break; |
| case A_CPUWAIT: |
| if ((s->cpuwait & 1) && !(value & 1)) { |
| /* Powering up CPU 0 */ |
| arm_set_cpu_on_and_reset(0); |
| } |
| if ((s->cpuwait & 2) && !(value & 2)) { |
| /* Powering up CPU 1 */ |
| arm_set_cpu_on_and_reset(1); |
| } |
| s->cpuwait = value; |
| break; |
| case A_WICCTRL: |
| qemu_log_mask(LOG_UNIMP, "IoTKit SysCtl WICCTRL unimplemented\n"); |
| s->wicctrl = value; |
| break; |
| case A_SECDBGSET: |
| /* write-1-to-set */ |
| qemu_log_mask(LOG_UNIMP, "IoTKit SysCtl SECDBGSET unimplemented\n"); |
| s->secure_debug |= value; |
| break; |
| case A_SECDBGCLR: |
| /* write-1-to-clear */ |
| s->secure_debug &= ~value; |
| break; |
| case A_SWRESET: |
| /* One w/o bit to request a reset; all other bits reserved */ |
| if (value & R_SWRESET_SWRESETREQ_MASK) { |
| qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); |
| } |
| break; |
| case A_SCSECCTRL: |
| if (!s->is_sse200) { |
| goto bad_offset; |
| } |
| qemu_log_mask(LOG_UNIMP, "IoTKit SysCtl SCSECCTRL unimplemented\n"); |
| s->scsecctrl = value; |
| break; |
| case A_FCLK_DIV: |
| if (!s->is_sse200) { |
| goto bad_offset; |
| } |
| qemu_log_mask(LOG_UNIMP, "IoTKit SysCtl FCLK_DIV unimplemented\n"); |
| s->fclk_div = value; |
| break; |
| case A_SYSCLK_DIV: |
| if (!s->is_sse200) { |
| goto bad_offset; |
| } |
| qemu_log_mask(LOG_UNIMP, "IoTKit SysCtl SYSCLK_DIV unimplemented\n"); |
| s->sysclk_div = value; |
| break; |
| case A_CLOCK_FORCE: |
| if (!s->is_sse200) { |
| goto bad_offset; |
| } |
| qemu_log_mask(LOG_UNIMP, "IoTKit SysCtl CLOCK_FORCE unimplemented\n"); |
| s->clock_force = value; |
| break; |
| case A_INITSVTOR1: |
| if (!s->is_sse200) { |
| goto bad_offset; |
| } |
| s->initsvtor1 = value; |
| set_init_vtor(1, s->initsvtor1); |
| break; |
| case A_EWCTRL: |
| if (!s->is_sse200) { |
| goto bad_offset; |
| } |
| qemu_log_mask(LOG_UNIMP, "IoTKit SysCtl EWCTRL unimplemented\n"); |
| s->ewctrl = value; |
| break; |
| case A_PDCM_PD_SYS_SENSE: |
| if (!s->is_sse200) { |
| goto bad_offset; |
| } |
| qemu_log_mask(LOG_UNIMP, |
| "IoTKit SysCtl PDCM_PD_SYS_SENSE unimplemented\n"); |
| s->pdcm_pd_sys_sense = value; |
| break; |
| case A_PDCM_PD_SRAM0_SENSE: |
| if (!s->is_sse200) { |
| goto bad_offset; |
| } |
| qemu_log_mask(LOG_UNIMP, |
| "IoTKit SysCtl PDCM_PD_SRAM0_SENSE unimplemented\n"); |
| s->pdcm_pd_sram0_sense = value; |
| break; |
| case A_PDCM_PD_SRAM1_SENSE: |
| if (!s->is_sse200) { |
| goto bad_offset; |
| } |
| qemu_log_mask(LOG_UNIMP, |
| "IoTKit SysCtl PDCM_PD_SRAM1_SENSE unimplemented\n"); |
| s->pdcm_pd_sram1_sense = value; |
| break; |
| case A_PDCM_PD_SRAM2_SENSE: |
| if (!s->is_sse200) { |
| goto bad_offset; |
| } |
| qemu_log_mask(LOG_UNIMP, |
| "IoTKit SysCtl PDCM_PD_SRAM2_SENSE unimplemented\n"); |
| s->pdcm_pd_sram2_sense = value; |
| break; |
| case A_PDCM_PD_SRAM3_SENSE: |
| if (!s->is_sse200) { |
| goto bad_offset; |
| } |
| qemu_log_mask(LOG_UNIMP, |
| "IoTKit SysCtl PDCM_PD_SRAM3_SENSE unimplemented\n"); |
| s->pdcm_pd_sram3_sense = value; |
| break; |
| case A_NMI_ENABLE: |
| /* In IoTKit this is BUSWAIT: reserved, R/O, zero */ |
| if (!s->is_sse200) { |
| goto ro_offset; |
| } |
| qemu_log_mask(LOG_UNIMP, "IoTKit SysCtl NMI_ENABLE unimplemented\n"); |
| s->nmi_enable = value; |
| break; |
| case A_SECDBGSTAT: |
| case A_PID4 ... A_CID3: |
| ro_offset: |
| qemu_log_mask(LOG_GUEST_ERROR, |
| "IoTKit SysCtl write: write of RO offset %x\n", |
| (int)offset); |
| break; |
| default: |
| bad_offset: |
| qemu_log_mask(LOG_GUEST_ERROR, |
| "IoTKit SysCtl write: bad offset %x\n", (int)offset); |
| break; |
| } |
| } |
| |
| static const MemoryRegionOps iotkit_sysctl_ops = { |
| .read = iotkit_sysctl_read, |
| .write = iotkit_sysctl_write, |
| .endianness = DEVICE_LITTLE_ENDIAN, |
| /* byte/halfword accesses are just zero-padded on reads and writes */ |
| .impl.min_access_size = 4, |
| .impl.max_access_size = 4, |
| .valid.min_access_size = 1, |
| .valid.max_access_size = 4, |
| }; |
| |
| static void iotkit_sysctl_reset(DeviceState *dev) |
| { |
| IoTKitSysCtl *s = IOTKIT_SYSCTL(dev); |
| |
| trace_iotkit_sysctl_reset(); |
| s->secure_debug = 0; |
| s->reset_syndrome = 1; |
| s->reset_mask = 0; |
| s->gretreg = 0; |
| s->initsvtor0 = s->initsvtor0_rst; |
| s->initsvtor1 = s->initsvtor1_rst; |
| s->cpuwait = s->cpuwait_rst; |
| s->wicctrl = 0; |
| s->scsecctrl = 0; |
| s->fclk_div = 0; |
| s->sysclk_div = 0; |
| s->clock_force = 0; |
| s->nmi_enable = 0; |
| s->ewctrl = 0; |
| s->pdcm_pd_sys_sense = 0x7f; |
| s->pdcm_pd_sram0_sense = 0; |
| s->pdcm_pd_sram1_sense = 0; |
| s->pdcm_pd_sram2_sense = 0; |
| s->pdcm_pd_sram3_sense = 0; |
| } |
| |
| static void iotkit_sysctl_init(Object *obj) |
| { |
| SysBusDevice *sbd = SYS_BUS_DEVICE(obj); |
| IoTKitSysCtl *s = IOTKIT_SYSCTL(obj); |
| |
| memory_region_init_io(&s->iomem, obj, &iotkit_sysctl_ops, |
| s, "iotkit-sysctl", 0x1000); |
| sysbus_init_mmio(sbd, &s->iomem); |
| } |
| |
| static void iotkit_sysctl_realize(DeviceState *dev, Error **errp) |
| { |
| IoTKitSysCtl *s = IOTKIT_SYSCTL(dev); |
| |
| /* The top 4 bits of the SYS_VERSION register tell us if we're an SSE-200 */ |
| if (extract32(s->sys_version, 28, 4) == 2) { |
| s->is_sse200 = true; |
| } |
| } |
| |
| static bool sse200_needed(void *opaque) |
| { |
| IoTKitSysCtl *s = IOTKIT_SYSCTL(opaque); |
| |
| return s->is_sse200; |
| } |
| |
| static const VMStateDescription iotkit_sysctl_sse200_vmstate = { |
| .name = "iotkit-sysctl/sse-200", |
| .version_id = 1, |
| .minimum_version_id = 1, |
| .needed = sse200_needed, |
| .fields = (VMStateField[]) { |
| VMSTATE_UINT32(scsecctrl, IoTKitSysCtl), |
| VMSTATE_UINT32(fclk_div, IoTKitSysCtl), |
| VMSTATE_UINT32(sysclk_div, IoTKitSysCtl), |
| VMSTATE_UINT32(clock_force, IoTKitSysCtl), |
| VMSTATE_UINT32(initsvtor1, IoTKitSysCtl), |
| VMSTATE_UINT32(nmi_enable, IoTKitSysCtl), |
| VMSTATE_UINT32(pdcm_pd_sys_sense, IoTKitSysCtl), |
| VMSTATE_UINT32(pdcm_pd_sram0_sense, IoTKitSysCtl), |
| VMSTATE_UINT32(pdcm_pd_sram1_sense, IoTKitSysCtl), |
| VMSTATE_UINT32(pdcm_pd_sram2_sense, IoTKitSysCtl), |
| VMSTATE_UINT32(pdcm_pd_sram3_sense, IoTKitSysCtl), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| static const VMStateDescription iotkit_sysctl_vmstate = { |
| .name = "iotkit-sysctl", |
| .version_id = 1, |
| .minimum_version_id = 1, |
| .fields = (VMStateField[]) { |
| VMSTATE_UINT32(secure_debug, IoTKitSysCtl), |
| VMSTATE_UINT32(reset_syndrome, IoTKitSysCtl), |
| VMSTATE_UINT32(reset_mask, IoTKitSysCtl), |
| VMSTATE_UINT32(gretreg, IoTKitSysCtl), |
| VMSTATE_UINT32(initsvtor0, IoTKitSysCtl), |
| VMSTATE_UINT32(cpuwait, IoTKitSysCtl), |
| VMSTATE_UINT32(wicctrl, IoTKitSysCtl), |
| VMSTATE_END_OF_LIST() |
| }, |
| .subsections = (const VMStateDescription*[]) { |
| &iotkit_sysctl_sse200_vmstate, |
| NULL |
| } |
| }; |
| |
| static Property iotkit_sysctl_props[] = { |
| DEFINE_PROP_UINT32("SYS_VERSION", IoTKitSysCtl, sys_version, 0), |
| DEFINE_PROP_UINT32("CPUWAIT_RST", IoTKitSysCtl, cpuwait_rst, 0), |
| DEFINE_PROP_UINT32("INITSVTOR0_RST", IoTKitSysCtl, initsvtor0_rst, |
| 0x10000000), |
| DEFINE_PROP_UINT32("INITSVTOR1_RST", IoTKitSysCtl, initsvtor1_rst, |
| 0x10000000), |
| DEFINE_PROP_END_OF_LIST() |
| }; |
| |
| static void iotkit_sysctl_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| |
| dc->vmsd = &iotkit_sysctl_vmstate; |
| dc->reset = iotkit_sysctl_reset; |
| dc->props = iotkit_sysctl_props; |
| dc->realize = iotkit_sysctl_realize; |
| } |
| |
| static const TypeInfo iotkit_sysctl_info = { |
| .name = TYPE_IOTKIT_SYSCTL, |
| .parent = TYPE_SYS_BUS_DEVICE, |
| .instance_size = sizeof(IoTKitSysCtl), |
| .instance_init = iotkit_sysctl_init, |
| .class_init = iotkit_sysctl_class_init, |
| }; |
| |
| static void iotkit_sysctl_register_types(void) |
| { |
| type_register_static(&iotkit_sysctl_info); |
| } |
| |
| type_init(iotkit_sysctl_register_types); |
