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Wed, 26 Jul 2023 06:25:38 -0700 (PDT) From: Sergey Kambalin X-Google-Original-From: Sergey Kambalin To: qemu-arm@nongnu.org Cc: qemu-devel@nongnu.org, Sergey Kambalin Subject: [PATCH 17/44] Add RNG200 skeleton Date: Wed, 26 Jul 2023 16:24:45 +0300 Message-Id: <20230726132512.149618-18-sergey.kambalin@auriga.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230726132512.149618-1-sergey.kambalin@auriga.com> References: <20230726132512.149618-1-sergey.kambalin@auriga.com> MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::136; envelope-from=serg.oker@gmail.com; helo=mail-lf1-x136.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+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Signed-off-by: Sergey Kambalin --- hw/misc/bcm2838_rng200.c | 118 +++++++++++++++++++++++++++++++ hw/misc/meson.build | 1 + hw/misc/trace-events | 10 +++ include/hw/misc/bcm2838_rng200.h | 77 ++++++++++++++++++++ 4 files changed, 206 insertions(+) create mode 100644 hw/misc/bcm2838_rng200.c create mode 100644 include/hw/misc/bcm2838_rng200.h diff --git a/hw/misc/bcm2838_rng200.c b/hw/misc/bcm2838_rng200.c new file mode 100644 index 0000000000..a17e8f2cda --- /dev/null +++ b/hw/misc/bcm2838_rng200.c @@ -0,0 +1,118 @@ +/* + * 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 "qapi/error.h" +#include "hw/qdev-properties.h" +#include "hw/misc/bcm2838_rng200.h" +#include "trace.h" + +static void bcm2838_rng200_rng_reset(BCM2838Rng200State *state) +{ + state->rng_ctrl.value = 0; + + trace_bcm2838_rng200_rng_soft_reset(); +} + +static uint64_t bcm2838_rng200_read(void *opaque, hwaddr offset, + unsigned size) +{ + uint32_t res = 0; + + trace_bcm2838_rng200_read((void *)offset, size, res); + return res; +} + +static void bcm2838_rng200_write(void *opaque, hwaddr offset, + uint64_t value, unsigned size) +{ + + trace_bcm2838_rng200_write((void *)offset, value, size); +} + +static const MemoryRegionOps bcm2838_rng200_ops = { + .read = bcm2838_rng200_read, + .write = bcm2838_rng200_write, + .endianness = DEVICE_NATIVE_ENDIAN, +}; + +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); + + object_property_add_child(OBJECT(dev), "default-backend", + default_backend); + object_unref(default_backend); + + object_property_set_link(OBJECT(dev), "rng", default_backend, + errp); + } + + 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->clock = qdev_init_clock_in(DEVICE(s), "rbg-clock", + NULL, 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_rng_reset(s); +} + +static Property bcm2838_rng200_properties[] = { + DEFINE_PROP_UINT32("rbg-period", BCM2838Rng200State, rbg_period, 250), + DEFINE_PROP_UINT32("rng-fifo-cap", BCM2838Rng200State, rng_fifo_cap, 128), + DEFINE_PROP_LINK("rng", BCM2838Rng200State, rng, + TYPE_RNG_BACKEND, RngBackend *), + DEFINE_PROP_BOOL("use-timer", BCM2838Rng200State, use_timer, true), + 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; + 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 892f8b91c5..a6230ced43 100644 --- a/hw/misc/meson.build +++ b/hw/misc/meson.build @@ -88,6 +88,7 @@ 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 4d1a0e17af..d26cd2d22d 100644 --- a/hw/misc/trace-events +++ b/hw/misc/trace-events @@ -297,3 +297,13 @@ virt_ctrl_instance_init(void *dev) "ctrl: %p" lasi_chip_mem_valid(uint64_t addr, uint32_t val) "access to addr 0x%"PRIx64" is %d" lasi_chip_read(uint64_t addr, uint32_t val) "addr 0x%"PRIx64" val 0x%08x" lasi_chip_write(uint64_t addr, uint32_t val) "addr 0x%"PRIx64" val 0x%08x" + +# 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(void *addr, uint64_t value, unsigned size) "addr %p, value 0x%016" PRIx64 ", size %u" +bcm2838_rng200_read(void *addr, unsigned size, uint64_t value) "addr %p, size %u, value 0x%016" PRIx64 diff --git a/include/hw/misc/bcm2838_rng200.h b/include/hw/misc/bcm2838_rng200.h new file mode 100644 index 0000000000..77f6cd8df4 --- /dev/null +++ b/include/hw/misc/bcm2838_rng200.h @@ -0,0 +1,77 @@ +/* + * 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) + +typedef union BCM2838Rng200Ctrl { + uint32_t value; + struct { + uint32_t rbg_enable:1; + uint32_t __r0:12; + uint32_t div:8; + }; +} BCM2838Rng200Ctrl; + +typedef union BCM2838Rng200Int { + uint32_t value; + struct { + uint32_t total_bits_count_irq:1; + uint32_t __r0:4; + uint32_t nist_fail_irq:1; + uint32_t __r1:11; + uint32_t startup_transition_met_irq:1; + uint32_t __r2:13; + uint32_t master_fail_lockout_irq:1; + }; +} BCM2838Rng200Int; + +typedef union BCM2838Rng200FifoCount { + uint32_t value; + struct { + uint32_t count:8; + uint32_t thld:8; + }; +} BCM2838Rng200FifoCount; + +struct BCM2838Rng200State { + SysBusDevice busdev; + MemoryRegion iomem; + + ptimer_state *ptimer; + RngBackend *rng; + Clock *clock; + + uint32_t rbg_period; + uint32_t rng_fifo_cap; + bool use_timer; + + Fifo8 fifo; + qemu_irq irq; + BCM2838Rng200Ctrl rng_ctrl; + BCM2838Rng200Int rng_int_status; + BCM2838Rng200Int rng_int_enable; + uint32_t rng_total_bit_count; + BCM2838Rng200FifoCount rng_fifo_count; + uint32_t rng_bit_count_threshold; +}; + +#endif /* BCM2838_RNG200_H */