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[Minios-devel] [PATCH 1/2] enable rtc pl031 for arm

Currently, as rtc is not enabled in arm, wall time can't be offered currectly. pl031 is chosen as the rtc device for arm. Nearly all of the function the device offers has been implemented. --- plat/common/arm/rtc.c | 144 ++++++++++++++++++++++++++++++++++++++ plat/common/include/rtc.h | 45 ++++++++++++ plat/kvm/Makefile.uk | 1 + plat/kvm/arm/setup.c | 3 + 4 files changed, 193 insertions(+) create mode 100644 plat/common/arm/rtc.c create mode 100644 plat/common/include/rtc.h diff --git a/plat/common/arm/rtc.c b/plat/common/arm/rtc.c new file mode 100644 index 0000000..73a2716 --- /dev/null +++ b/plat/common/arm/rtc.c @@ -0,0 +1,144 @@ +/* SPDX-License-Identifier: BSD-3-Clause */ +/* + * Authors: Wei Chen <Wei.Chen@xxxxxxx> + * Jianyong Wu <Jianyong.Wu@xxxxxxx> + * + * Copyright (c) 2018, Arm Ltd. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the copyright holder nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + * THIS HEADER MAY NOT BE EXTRACTED OR MODIFIED IN ANY WAY. + */ +#include <string.h> +#include <libfdt.h> +#include <uk/assert.h> +#include <uk/essentials.h> +#include <uk/print.h> +#include <arm/cpu.h> +#include <ofw/fdt.h> +#include <stdio.h> + +static uint64_t rtc_base_addr; +uint32_t rtc_boot_seconds; + +/* Define offset of RTC registers */ +#define RTC_REG_DR 0 +#define RTC_REG_MR 0x4 +#define RTC_REG_LR 0x8 +#define RTC_REG_CR 0xc +#define RTC_REG_IMSC 0x10 +#define RTC_REG_RIS 0x14 +#define RTC_REG_MIS 0x18 +#define RTC_REG_ICR 0x1c + +#define RTC_REG(r) (rtc_base_addr + (r)) + +static const char *rtc_device_list[] = { + "arm,pl031", +}; + +static uint32_t rtc_read(void) +{ + return ioreg_read32(RTC_REG(RTC_REG_DR)); +} + +/* + * set rtc match register comparing with counter + * value to generat a interrupt + */ +void rtc_set_match(uint32_t alam) +{ + ioreg_write32(RTC_REG(RTC_REG_MR), alam); +} + +void rtc_update(uint32_t val) +{ + ioreg_write32(RTC_REG(RTC_REG_LR), val); +} + +void rtc_enable(void) +{ + ioreg_write32(RTC_REG(RTC_REG_CR), 1); +} + +/* return rtc status, 1 denotes enable and 0 denotes disable */ +uint32_t rtc_get_status(void) +{ + uint32_t val; + + val = ioreg_read32(RTC_REG(RTC_REG_CR)); + val &= 0x1; + return val; +} + +/* mask alam */ +void rtc_mask_intr(void) +{ + ioreg_write32(RTC_REG(RTC_REG_IMSC), 1); +} + +/* clear alam mask */ +void rtc_unmask_intr(void) +{ + ioreg_write32(RTC_REG(RTC_REG_IMSC), 0); +} + +/* return the raw state of rtc interrupt before masking*/ +uint32_t rtc_get_intr_raw_state(void) +{ + return ioreg_read32(RTC_REG(RTC_REG_RIS)); +} + +/* return interrupt state after interrupt masking */ +uint32_t rtc_get_intr_state(void) +{ + return ioreg_read32(RTC_REG(RTC_REG_MIS)); +} + +void rtc_clear_intr(void) +{ + ioreg_write32(RTC_REG(RTC_REG_ICR), 1); +} + +void _dtb_init_rtc(void *dtb) +{ + uint64_t size; + int fdt_rtc, ret; + + uk_pr_info("Probing RTC...\n"); + fdt_rtc = fdt_node_offset_by_compatible_list(dtb, -1, rtc_device_list); + if (fdt_rtc < 0) + UK_CRASH("Could not find rtc device!\n"); + + ret = fdt_get_address(dtb, fdt_rtc, 0, &rtc_base_addr, &size); + if (ret < 0) + UK_CRASH("Could not get rtc address\n"); + + /* Record the boot seconds */ + rtc_boot_seconds = rtc_read(); + + uk_pr_info("Found RTC on: %p\n", rtc_base_addr); +} diff --git a/plat/common/include/rtc.h b/plat/common/include/rtc.h new file mode 100644 index 0000000..b764c32 --- /dev/null +++ b/plat/common/include/rtc.h @@ -0,0 +1,45 @@ +/* SPDX-License-Identifier: BSD-3-Clause */ +/* + * Authors: Wei Chen <Wei.Chen@xxxxxxx> + * Jianyong Wu <Jianyong.Wu@xxxxxxx> + * + * Copyright (c) 2019, Arm Ltd. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the copyright holder nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + * THIS HEADER MAY NOT BE EXTRACTED OR MODIFIED IN ANY WAY. + */ + +#ifndef __PLAT_CMN_ARM_RTC_H__ +#define __PLAT_CMN_ARM_RTC_H__ + +#include <stdint.h> + +extern uint32_t rtc_boot_seconds; + +int _dtb_init_rtc(void *dtb); + +#endif //__PLAT_CMN_ARM_GICV2_H__ diff --git a/plat/kvm/Makefile.uk b/plat/kvm/Makefile.uk index c900d45..23187fb 100644 --- a/plat/kvm/Makefile.uk +++ b/plat/kvm/Makefile.uk @@ -74,6 +74,7 @@ endif ifeq ($(findstring y,$(CONFIG_KVM_KERNEL_SERIAL_CONSOLE) $(CONFIG_KVM_DEBUG_SERIAL_CONSOLE)),y) LIBKVMPLAT_SRCS-$(CONFIG_ARCH_ARM_64) += $(UK_PLAT_COMMON_BASE)/arm/pl011.c|common endif +LIBKVMPLAT_SRCS-$(CONFIG_ARCH_ARM_64) += $(UK_PLAT_COMMON_BASE)/arm/rtc.c|common LIBKVMPLAT_SRCS-$(CONFIG_ARCH_ARM_64) += $(UK_PLAT_COMMON_BASE)/arm/cpu_native.c|common LIBKVMPLAT_SRCS-$(CONFIG_ARCH_ARM_64) += $(UK_PLAT_COMMON_BASE)/arm/cache64.S|common LIBKVMPLAT_SRCS-$(CONFIG_ARCH_ARM_64) += $(UK_PLAT_COMMON_BASE)/arm/psci_arm64.S|common diff --git a/plat/kvm/arm/setup.c b/plat/kvm/arm/setup.c index 3046646..b20bb79 100644 --- a/plat/kvm/arm/setup.c +++ b/plat/kvm/arm/setup.c @@ -221,6 +221,9 @@ void _libkvmplat_start(void *dtb_pointer) /* Initialize memory from DTB */ _init_dtb_mem(); + /* Initialize rtc */ + _dtb_init_rtc(dtb_pointer); + /* Initialize interrupt controller */ intctrl_init(); -- 2.17.1 _______________________________________________ Minios-devel mailing list Minios-devel@xxxxxxxxxxxxxxxxxxxx https://lists.xenproject.org/mailman/listinfo/minios-devel

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