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Sun, 25 Feb 2024 16:03:21 -0800 (PST) From: Sergey Kambalin X-Google-Original-From: Sergey Kambalin To: qemu-arm@nongnu.org Cc: qemu-devel@nongnu.org, Sergey Kambalin Subject: [PATCH v6 16/41] Add RPi4 RNG200 Date: Sun, 25 Feb 2024 18:02:34 -0600 Message-Id: <20240226000259.2752893-17-sergey.kambalin@auriga.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240226000259.2752893-1-sergey.kambalin@auriga.com> References: <20240226000259.2752893-1-sergey.kambalin@auriga.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::112a; envelope-from=serg.oker@gmail.com; helo=mail-yw1-x112a.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Signed-off-by: Sergey Kambalin --- hw/arm/bcm2838.c | 4 + hw/arm/bcm2838_peripherals.c | 17 ++ hw/arm/raspi4b.c | 1 - hw/misc/bcm2838_rng200.c | 405 +++++++++++++++++++++++++++ hw/misc/meson.build | 1 + hw/misc/trace-events | 9 + include/hw/arm/bcm2838_peripherals.h | 2 + include/hw/misc/bcm2838_rng200.h | 43 +++ 8 files changed, 481 insertions(+), 1 deletion(-) create mode 100644 hw/misc/bcm2838_rng200.c create mode 100644 include/hw/misc/bcm2838_rng200.h diff --git a/hw/arm/bcm2838.c b/hw/arm/bcm2838.c index 481b262b02..c330322bd5 100644 --- a/hw/arm/bcm2838.c +++ b/hw/arm/bcm2838.c @@ -205,6 +205,10 @@ static void bcm2838_realize(DeviceState *dev, Error **errp) sysbus_connect_irq(SYS_BUS_DEVICE(&ps_base->dwc2), 0, qdev_get_gpio_in(gicdev, GIC_SPI_INTERRUPT_DWC2)); + /* Connect RNG200 to the interrupt controller */ + sysbus_connect_irq(SYS_BUS_DEVICE(&ps->rng200), 0, + qdev_get_gpio_in(gicdev, GIC_SPI_INTERRUPT_RNG200)); + /* Connect DMA 0-6 to the interrupt controller */ for (int n = GIC_SPI_INTERRUPT_DMA_0; n <= GIC_SPI_INTERRUPT_DMA_6; n++) { sysbus_connect_irq(SYS_BUS_DEVICE(&ps_base->dma), diff --git a/hw/arm/bcm2838_peripherals.c b/hw/arm/bcm2838_peripherals.c index 23e1154466..4a9cbe6cf6 100644 --- a/hw/arm/bcm2838_peripherals.c +++ b/hw/arm/bcm2838_peripherals.c @@ -34,6 +34,9 @@ static void bcm2838_peripherals_init(Object *obj) bc->peri_low_size); sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->peri_low_mr); + /* Random Number Generator */ + object_initialize_child(obj, "rng200", &s->rng200, TYPE_BCM2838_RNG200); + /* PCIe Host Bridge */ object_initialize_child(obj, "pcie-host", &s->pcie_host, TYPE_BCM2838_PCIE_HOST); @@ -75,6 +78,8 @@ static void bcm2838_peripherals_realize(DeviceState *dev, Error **errp) BCMSocPeripheralBaseState *s_base = BCM_SOC_PERIPHERALS_BASE(dev); MemoryRegion *regs_mr; MemoryRegion *mmio_mr; + MemoryRegion *rng200_mr; + qemu_irq rng_200_irq; int n; @@ -88,6 +93,18 @@ static void bcm2838_peripherals_realize(DeviceState *dev, Error **errp) BCM2838_VC_PERI_LOW_BASE, &s->peri_low_mr_alias, 1); + /* Random Number Generator */ + if (!sysbus_realize(SYS_BUS_DEVICE(&s->rng200), errp)) { + return; + } + + rng200_mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->rng200), 0); + memory_region_add_subregion(&s_base->peri_mr, RNG_OFFSET, rng200_mr); + + rng_200_irq = qdev_get_gpio_in_named(DEVICE(&s_base->ic), + BCM2835_IC_GPU_IRQ, INTERRUPT_RNG); + sysbus_connect_irq(SYS_BUS_DEVICE(&s->rng200), 0, rng_200_irq); + /* Extended Mass Media Controller 2 */ object_property_set_uint(OBJECT(&s->emmc2), "sd-spec-version", 3, &error_abort); diff --git a/hw/arm/raspi4b.c b/hw/arm/raspi4b.c index 2431b0b8c3..3c71fa9a9a 100644 --- a/hw/arm/raspi4b.c +++ b/hw/arm/raspi4b.c @@ -67,7 +67,6 @@ static void raspi4_modify_dtb(const struct arm_boot_info *info, void *fdt) /* Temporarily disable following devices until they are implemented */ const char *nodes_to_remove[] = { - "brcm,bcm2711-rng200", "brcm,bcm2711-thermal", "brcm,bcm2711-genet-v5", }; diff --git a/hw/misc/bcm2838_rng200.c b/hw/misc/bcm2838_rng200.c new file mode 100644 index 0000000000..84ed723a1c --- /dev/null +++ b/hw/misc/bcm2838_rng200.c @@ -0,0 +1,405 @@ +/* + * BCM2838 Random Number Generator emulation + * + * Copyright (C) 2022 Sergey Pushkarev + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + */ + +#include "qemu/osdep.h" +#include "qemu/log.h" +#include "qom/object_interfaces.h" +#include "qapi/error.h" +#include "hw/qdev-properties.h" +#include "hw/misc/bcm2838_rng200.h" +#include "hw/registerfields.h" +#include "migration/vmstate.h" +#include "trace.h" + +/* RNG200 registers */ +REG32(RNG_CTRL, 0x00) + FIELD(RNG_CTRL, RBG_ENABLE, 0 , 1) + FIELD(RNG_CTRL, RSVD, 1 , 12) + FIELD(RNG_CTRL, DIV, 13 , 8) + +REG32(RNG_SOFT_RESET, 0x04) +REG32(RBG_SOFT_RESET, 0x08) +REG32(RNG_TOTAL_BIT_COUNT, 0x0C) +REG32(RNG_TOTAL_BIT_COUNT_THRESHOLD, 0x10) + +REG32(RNG_INT_STATUS, 0x18) + FIELD(RNG_INT_STATUS, TOTAL_BITS_COUNT_IRQ, 0, 1) + FIELD(RNG_INT_STATUS, RSVD0, 1, 4) + FIELD(RNG_INT_STATUS, NIST_FAIL_IRQ, 5, 1) + FIELD(RNG_INT_STATUS, RSVD1, 6, 11) + FIELD(RNG_INT_STATUS, STARTUP_TRANSITIONS_MET_IRQ, 17, 1) + FIELD(RNG_INT_STATUS, RSVD2, 18, 13) + FIELD(RNG_INT_STATUS, MASTER_FAIL_LOCKOUT_IRQ, 30, 1) + +REG32(RNG_INT_ENABLE, 0x1C) + FIELD(RNG_INT_ENABLE, TOTAL_BITS_COUNT_IRQ, 0, 1) + FIELD(RNG_INT_ENABLE, RSVD0, 1, 4) + FIELD(RNG_INT_ENABLE, NIST_FAIL_IRQ, 5, 1) + FIELD(RNG_INT_ENABLE, RSVD1, 6, 11) + FIELD(RNG_INT_ENABLE, STARTUP_TRANSITIONS_MET_IRQ, 17, 1) + FIELD(RNG_INT_ENABLE, RSVD2, 18, 13) + FIELD(RNG_INT_ENABLE, MASTER_FAIL_LOCKOUT_IRQ, 30, 1) + +REG32(RNG_FIFO_DATA, 0x20) + +REG32(RNG_FIFO_COUNT, 0x24) + FIELD(RNG_FIFO_COUNT, COUNT, 0, 8) + FIELD(RNG_FIFO_COUNT, THRESHOLD, 8, 8) + + +#define RNG_WARM_UP_PERIOD_ELAPSED 17 + +#define SOFT_RESET 1 +#define IRQ_PENDING 1 + +#define BCM2838_RNG200_PTIMER_POLICY (PTIMER_POLICY_CONTINUOUS_TRIGGER) + +static const VMStateDescription vmstate_bcm2838_rng200 = { + .name = "bcm2838_rng200", + .version_id = 1, + .minimum_version_id = 1, + .fields = (VMStateField[]) { + VMSTATE_UINT32(rng_fifo_cap, BCM2838Rng200State), + VMSTATE_ARRAY(regs, BCM2838Rng200State, N_BCM2838_RNG200_REGS, 0, + vmstate_info_uint32, uint32_t), + + VMSTATE_END_OF_LIST() + } +}; + +static bool is_rbg_enabled(BCM2838Rng200State *s) +{ + return FIELD_EX32(s->regs[R_RNG_CTRL], RNG_CTRL, RBG_ENABLE); +} + +static void increment_bit_counter_by(BCM2838Rng200State *s, uint32_t inc_val) { + s->regs[R_RNG_TOTAL_BIT_COUNT] += inc_val; +} + +static void bcm2838_rng200_update_irq(BCM2838Rng200State *s) +{ + qemu_set_irq(s->irq, + !!(s->regs[R_RNG_INT_ENABLE] & s->regs[R_RNG_INT_STATUS])); +} + +static void bcm2838_rng200_update_rbg_period(void *opaque, ClockEvent event) +{ + BCM2838Rng200State *s = (BCM2838Rng200State *)opaque; + + ptimer_transaction_begin(s->ptimer); + ptimer_set_period_from_clock(s->ptimer, s->clock, s->rng_fifo_cap * 8); + ptimer_transaction_commit(s->ptimer); +} + +static void bcm2838_rng200_update_fifo(void *opaque, const void *buf, + size_t size) +{ + BCM2838Rng200State *s = (BCM2838Rng200State *)opaque; + Fifo8 *fifo = &s->fifo; + size_t num = MIN(size, fifo8_num_free(fifo)); + uint32_t num_bits = num * 8; + uint32_t bit_count = 0; + uint32_t bit_count_thld = 0; + uint32_t fifo_thld = 0; + + bit_count = s->regs[R_RNG_TOTAL_BIT_COUNT]; + bit_count_thld = s->regs[R_RNG_TOTAL_BIT_COUNT_THRESHOLD]; + + if (bit_count + num_bits < bit_count_thld) { + increment_bit_counter_by(s, num_bits); + + fifo8_push_all(fifo, buf, num); + + fifo_thld = FIELD_EX32(s->regs[R_RNG_FIFO_COUNT], + RNG_FIFO_COUNT, THRESHOLD); + + if (fifo8_num_used(fifo) > fifo_thld) { + s->regs[R_RNG_INT_STATUS] = FIELD_DP32(s->regs[R_RNG_INT_STATUS], + RNG_INT_STATUS, + TOTAL_BITS_COUNT_IRQ, 1); + } + } + + s->regs[R_RNG_FIFO_COUNT] = FIELD_DP32(s->regs[R_RNG_FIFO_COUNT], + RNG_FIFO_COUNT, + COUNT, + fifo8_num_used(fifo) >> 2); + bcm2838_rng200_update_irq(s); + trace_bcm2838_rng200_update_fifo(num, fifo8_num_used(fifo)); +} + +static void bcm2838_rng200_fill_fifo(BCM2838Rng200State *s) +{ + rng_backend_request_entropy(s->rng, fifo8_num_free(&s->fifo), + bcm2838_rng200_update_fifo, s); +} + +static void bcm2838_rng200_disable_rbg(void) +{ + trace_bcm2838_rng200_disable_rbg(); +} + +static void bcm2838_rng200_enable_rbg(BCM2838Rng200State *s) +{ + s->regs[R_RNG_TOTAL_BIT_COUNT] = RNG_WARM_UP_PERIOD_ELAPSED; + + bcm2838_rng200_fill_fifo(s); + + trace_bcm2838_rng200_enable_rbg(); +} + +static void bcm2838_rng200_rng_reset(BCM2838Rng200State *s) +{ + memset(s->regs, 0, sizeof(s->regs)); + s->regs[R_RNG_INT_STATUS] = FIELD_DP32(s->regs[R_RNG_INT_STATUS], + RNG_INT_STATUS, + STARTUP_TRANSITIONS_MET_IRQ, + IRQ_PENDING); + fifo8_reset(&s->fifo); + + trace_bcm2838_rng200_rng_soft_reset(); +} + +static void bcm2838_rng200_rbg_reset(BCM2838Rng200State *s) +{ + trace_bcm2838_rng200_rbg_soft_reset(); +} + +static uint32_t bcm2838_rng200_read_fifo_data(BCM2838Rng200State *s) +{ + const uint8_t *buf; + Fifo8 *fifo = &s->fifo; + uint32_t to_read = MIN(fifo8_num_used(fifo), 4); + uint8_t byte_buf[4] = {}; + uint8_t *p = byte_buf; + uint32_t ret = 0; + uint32_t num = 0; + + while (to_read) { + buf = fifo8_pop_buf(fifo, to_read, &num); + memcpy(p, buf, num); + p += num; + to_read -= num; + } + ret = ldl_le_p(byte_buf); + + s->regs[R_RNG_FIFO_COUNT] = FIELD_DP32(s->regs[R_RNG_FIFO_COUNT], + RNG_FIFO_COUNT, + COUNT, + fifo8_num_used(fifo) >> 2); + + bcm2838_rng200_fill_fifo(s); + + return ret; +} + +static void bcm2838_rng200_ctrl_write(BCM2838Rng200State *s, uint32_t value) +{ + bool currently_enabled = is_rbg_enabled(s); + bool enable_requested = FIELD_EX32(value, RNG_CTRL, RBG_ENABLE); + + s->regs[R_RNG_CTRL] = value; + + if (!currently_enabled && enable_requested) { + bcm2838_rng200_enable_rbg(s); + } else if (currently_enabled && !enable_requested) { + bcm2838_rng200_disable_rbg(); + } +} + +static uint64_t bcm2838_rng200_read(void *opaque, hwaddr offset, + unsigned size) +{ + BCM2838Rng200State *s = (BCM2838Rng200State *)opaque; + uint32_t res = 0; + + switch (offset) { + case A_RNG_CTRL: + res = s->regs[R_RNG_CTRL]; + break; + case A_RNG_SOFT_RESET: + case A_RBG_SOFT_RESET: + break; + case A_RNG_INT_STATUS: + res = s->regs[R_RNG_INT_STATUS]; + break; + case A_RNG_INT_ENABLE: + res = s->regs[R_RNG_INT_ENABLE]; + break; + case A_RNG_FIFO_DATA: + res = bcm2838_rng200_read_fifo_data(s); + break; + case A_RNG_FIFO_COUNT: + res = s->regs[R_RNG_FIFO_COUNT]; + break; + case A_RNG_TOTAL_BIT_COUNT: + res = s->regs[R_RNG_TOTAL_BIT_COUNT]; + break; + case A_RNG_TOTAL_BIT_COUNT_THRESHOLD: + res = s->regs[R_RNG_TOTAL_BIT_COUNT_THRESHOLD]; + break; + default: + qemu_log_mask( + LOG_GUEST_ERROR, + "bcm2838_rng200_read: Bad offset 0x%" HWADDR_PRIx "\n", + offset + ); + res = 0; + break; + } + + trace_bcm2838_rng200_read(offset, size, res); + return res; +} + +static void bcm2838_rng200_write(void *opaque, hwaddr offset, + uint64_t value, unsigned size) +{ + BCM2838Rng200State *s = (BCM2838Rng200State *)opaque; + + trace_bcm2838_rng200_write(offset, value, size); + + switch (offset) { + case A_RNG_CTRL: + bcm2838_rng200_ctrl_write(s, value); + break; + case A_RNG_SOFT_RESET: + if (value & SOFT_RESET) { + bcm2838_rng200_rng_reset(s); + } + break; + case A_RBG_SOFT_RESET: + if (value & SOFT_RESET) { + bcm2838_rng200_rbg_reset(s); + } + break; + case A_RNG_INT_STATUS: + s->regs[R_RNG_INT_STATUS] &= ~value; + bcm2838_rng200_update_irq(s); + break; + case A_RNG_INT_ENABLE: + s->regs[R_RNG_INT_ENABLE] = value; + bcm2838_rng200_update_irq(s); + break; + case A_RNG_FIFO_COUNT: + s->regs[R_RNG_FIFO_COUNT] = value; + break; + case A_RNG_TOTAL_BIT_COUNT_THRESHOLD: + s->regs[R_RNG_TOTAL_BIT_COUNT_THRESHOLD] = value; + s->regs[R_RNG_TOTAL_BIT_COUNT] = value + 1; + break; + default: + qemu_log_mask( + LOG_GUEST_ERROR, + "bcm2838_rng200_write: Bad offset 0x%" HWADDR_PRIx "\n", + offset + ); + break; + } +} + +static const MemoryRegionOps bcm2838_rng200_ops = { + .read = bcm2838_rng200_read, + .write = bcm2838_rng200_write, + .endianness = DEVICE_NATIVE_ENDIAN, + .impl = { + .max_access_size = 4, + .min_access_size = 4, + }, + .valid = { + .max_access_size = 4, + .min_access_size = 4 + }, +}; + +static void bcm2838_rng200_realize(DeviceState *dev, Error **errp) +{ + BCM2838Rng200State *s = BCM2838_RNG200(dev); + + if (s->rng == NULL) { + Object *default_backend = object_new(TYPE_RNG_BUILTIN); + + if (!user_creatable_complete(USER_CREATABLE(default_backend), + errp)) { + object_unref(default_backend); + error_setg(errp, "Failed to create user creatable RNG backend"); + return; + } + + object_property_add_child(OBJECT(dev), "default-backend", + default_backend); + object_unref(default_backend); + + object_property_set_link(OBJECT(dev), "rng", default_backend, + errp); + } + + fifo8_create(&s->fifo, s->rng_fifo_cap); + sysbus_init_irq(SYS_BUS_DEVICE(dev), &s->irq); +} + +static void bcm2838_rng200_init(Object *obj) +{ + BCM2838Rng200State *s = BCM2838_RNG200(obj); + SysBusDevice *sbd = SYS_BUS_DEVICE(obj); + + s->rng_fifo_cap = 128; + + s->clock = qdev_init_clock_in(DEVICE(s), "rbg-clock", + bcm2838_rng200_update_rbg_period, s, + ClockPreUpdate); + if (s->clock == NULL) { + error_setg(&error_fatal, "Failed to init RBG clock"); + return; + } + + memory_region_init_io(&s->iomem, obj, &bcm2838_rng200_ops, s, + TYPE_BCM2838_RNG200, 0x28); + sysbus_init_mmio(sbd, &s->iomem); +} + +static void bcm2838_rng200_reset(DeviceState *dev) +{ + BCM2838Rng200State *s = BCM2838_RNG200(dev); + + bcm2838_rng200_rbg_reset(s); + bcm2838_rng200_rng_reset(s); +} + +static Property bcm2838_rng200_properties[] = { + DEFINE_PROP_LINK("rng", BCM2838Rng200State, rng, + TYPE_RNG_BACKEND, RngBackend *), + DEFINE_PROP_END_OF_LIST(), +}; + +static void bcm2838_rng200_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->realize = bcm2838_rng200_realize; + dc->reset = bcm2838_rng200_reset; + dc->vmsd = &vmstate_bcm2838_rng200; + + device_class_set_props(dc, bcm2838_rng200_properties); +} + +static const TypeInfo bcm2838_rng200_info = { + .name = TYPE_BCM2838_RNG200, + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(BCM2838Rng200State), + .class_init = bcm2838_rng200_class_init, + .instance_init = bcm2838_rng200_init, +}; + +static void bcm2838_rng200_register_types(void) +{ + type_register_static(&bcm2838_rng200_info); +} + +type_init(bcm2838_rng200_register_types) diff --git a/hw/misc/meson.build b/hw/misc/meson.build index 746686835b..a3bee4375d 100644 --- a/hw/misc/meson.build +++ b/hw/misc/meson.build @@ -92,6 +92,7 @@ system_ss.add(when: 'CONFIG_RASPI', if_true: files( 'bcm2835_thermal.c', 'bcm2835_cprman.c', 'bcm2835_powermgt.c', + 'bcm2838_rng200.c', )) system_ss.add(when: 'CONFIG_SLAVIO', if_true: files('slavio_misc.c')) system_ss.add(when: 'CONFIG_ZYNQ', if_true: files('zynq_slcr.c')) diff --git a/hw/misc/trace-events b/hw/misc/trace-events index 5f5bc92222..e09e399580 100644 --- a/hw/misc/trace-events +++ b/hw/misc/trace-events @@ -341,3 +341,12 @@ djmemc_write(int reg, uint64_t value, unsigned int size) "reg=0x%x value=0x%"PRI # iosb.c iosb_read(int reg, uint64_t value, unsigned int size) "reg=0x%x value=0x%"PRIx64" size=%u" iosb_write(int reg, uint64_t value, unsigned int size) "reg=0x%x value=0x%"PRIx64" size=%u" +# bcm2838_rng200.c +bcm2838_rng200_rng_soft_reset(void) "RNumG soft reset" +bcm2838_rng200_rbg_soft_reset(void) "RBitG soft reset" +bcm2838_rng200_enable_rbg(void) "RBitG enabled" +bcm2838_rng200_disable_rbg(void) "RBitG disabled" +bcm2838_rng200_update_fifo(uint32_t len, uint32_t fifo_len) "len %u, fifo_len %u" +bcm2838_rng200_fifo_full(void) "RNumG FIFO full" +bcm2838_rng200_write(uint64_t addr, uint64_t value, unsigned size) "addr: 0x%"PRIx64" value: 0x%016" PRIx64 " size: %u" +bcm2838_rng200_read(uint64_t addr, unsigned size, uint64_t value) "addr: 0x%"PRIx64" size: %u value: 0x%016" PRIx64 diff --git a/include/hw/arm/bcm2838_peripherals.h b/include/hw/arm/bcm2838_peripherals.h index bbd8387cff..914a287af2 100644 --- a/include/hw/arm/bcm2838_peripherals.h +++ b/include/hw/arm/bcm2838_peripherals.h @@ -10,6 +10,7 @@ #define BCM2838_PERIPHERALS_H #include "hw/arm/bcm2835_peripherals.h" +#include "hw/misc/bcm2838_rng200.h" #include "hw/arm/bcm2838_pcie.h" #include "hw/sd/sdhci.h" #include "hw/gpio/bcm2838_gpio.h" @@ -64,6 +65,7 @@ struct BCM2838PeripheralState { MemoryRegion peri_low_mr_alias; MemoryRegion mphi_mr_alias; + BCM2838Rng200State rng200; SDHCIState emmc2; BCM2838PcieHostState pcie_host; BCM2838GpioState gpio; diff --git a/include/hw/misc/bcm2838_rng200.h b/include/hw/misc/bcm2838_rng200.h new file mode 100644 index 0000000000..09ba4936d8 --- /dev/null +++ b/include/hw/misc/bcm2838_rng200.h @@ -0,0 +1,43 @@ +/* + * BCM2838 Random Number Generator emulation + * + * Copyright (C) 2022 Sergey Pushkarev + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + */ + +#ifndef BCM2838_RNG200_H +#define BCM2838_RNG200_H + +#include +#include "qom/object.h" +#include "qemu/fifo8.h" +#include "sysemu/rng.h" +#include "hw/sysbus.h" +#include "hw/ptimer.h" +#include "hw/qdev-clock.h" +#include "hw/irq.h" + +#define TYPE_BCM2838_RNG200 "bcm2838-rng200" +OBJECT_DECLARE_SIMPLE_TYPE(BCM2838Rng200State, BCM2838_RNG200) + +#define N_BCM2838_RNG200_REGS 10 + +struct BCM2838Rng200State { + SysBusDevice busdev; + MemoryRegion iomem; + + ptimer_state *ptimer; + RngBackend *rng; + Clock *clock; + + uint32_t rng_fifo_cap; + Fifo8 fifo; + + qemu_irq irq; + + uint32_t regs[N_BCM2838_RNG200_REGS]; +}; + +#endif /* BCM2838_RNG200_H */