From 51712e49b434950b6317188f88696556c277b10d Mon Sep 17 00:00:00 2001 From: Costa Shulyupin Date: Mon, 17 Jul 2023 22:24:27 +0300 Subject: docs: move loongarch under arch and fix all in-tree references. Architecture-specific documentation is being moved into Documentation/arch/ as a way of cleaning up the top-level documentation directory and making the docs hierarchy more closely match the source hierarchy. Signed-off-by: Costa Shulyupin Acked-by: Huacai Chen Reviewed-by: Yanteng Si Signed-off-by: Jonathan Corbet Link: https://lore.kernel.org/r/20230717192456.453124-1-costa.shul@redhat.com --- .../zh_CN/arch/loongarch/irq-chip-model.rst | 157 +++++++++++++++++++++ 1 file changed, 157 insertions(+) create mode 100644 Documentation/translations/zh_CN/arch/loongarch/irq-chip-model.rst (limited to 'Documentation/translations/zh_CN/arch/loongarch/irq-chip-model.rst') diff --git a/Documentation/translations/zh_CN/arch/loongarch/irq-chip-model.rst b/Documentation/translations/zh_CN/arch/loongarch/irq-chip-model.rst new file mode 100644 index 000000000000..f1e9ab18206c --- /dev/null +++ b/Documentation/translations/zh_CN/arch/loongarch/irq-chip-model.rst @@ -0,0 +1,157 @@ +.. SPDX-License-Identifier: GPL-2.0 + +.. include:: ../../disclaimer-zh_CN.rst + +:Original: Documentation/arch/loongarch/irq-chip-model.rst +:Translator: Huacai Chen + +================================== +LoongArch的IRQ芯片模型（层级关系） +================================== + +目前，基于LoongArch的处理器（如龙芯3A5000）只能与LS7A芯片组配合工作。LoongArch计算机 +中的中断控制器（即IRQ芯片）包括CPUINTC（CPU Core Interrupt Controller）、LIOINTC（ +Legacy I/O Interrupt Controller）、EIOINTC（Extended I/O Interrupt Controller）、 +HTVECINTC（Hyper-Transport Vector Interrupt Controller）、PCH-PIC（LS7A芯片组的主中 +断控制器）、PCH-LPC（LS7A芯片组的LPC中断控制器）和PCH-MSI（MSI中断控制器）。 + +CPUINTC是一种CPU内部的每个核本地的中断控制器，LIOINTC/EIOINTC/HTVECINTC是CPU内部的 +全局中断控制器（每个芯片一个，所有核共享），而PCH-PIC/PCH-LPC/PCH-MSI是CPU外部的中 +断控制器（在配套芯片组里面）。这些中断控制器（或者说IRQ芯片）以一种层次树的组织形式 +级联在一起，一共有两种层级关系模型（传统IRQ模型和扩展IRQ模型）。 + +传统IRQ模型 +=========== + +在这种模型里面，IPI（Inter-Processor Interrupt）和CPU本地时钟中断直接发送到CPUINTC， +CPU串口（UARTs）中断发送到LIOINTC，而其他所有设备的中断则分别发送到所连接的PCH-PIC/ +PCH-LPC/PCH-MSI，然后被HTVECINTC统一收集，再发送到LIOINTC，最后到达CPUINTC:: + + +-----+ +---------+ +-------+ + | IPI | --> | CPUINTC | <-- | Timer | + +-----+ +---------+ +-------+ + ^ + | + +---------+ +-------+ + | LIOINTC | <-- | UARTs | + +---------+ +-------+ + ^ + | + +-----------+ + | HTVECINTC | + +-----------+ + ^ ^ + | | + +---------+ +---------+ + | PCH-PIC | | PCH-MSI | + +---------+ +---------+ + ^ ^ ^ + | | | + +---------+ +---------+ +---------+ + | PCH-LPC | | Devices | | Devices | + +---------+ +---------+ +---------+ + ^ + | + +---------+ + | Devices | + +---------+ + +扩展IRQ模型 +=========== + +在这种模型里面，IPI（Inter-Processor Interrupt）和CPU本地时钟中断直接发送到CPUINTC， +CPU串口（UARTs）中断发送到LIOINTC，而其他所有设备的中断则分别发送到所连接的PCH-PIC/ +PCH-LPC/PCH-MSI，然后被EIOINTC统一收集，再直接到达CPUINTC:: + + +-----+ +---------+ +-------+ + | IPI | --> | CPUINTC | <-- | Timer | + +-----+ +---------+ +-------+ + ^ ^ + | | + +---------+ +---------+ +-------+ + | EIOINTC | | LIOINTC | <-- | UARTs | + +---------+ +---------+ +-------+ + ^ ^ + | | + +---------+ +---------+ + | PCH-PIC | | PCH-MSI | + +---------+ +---------+ + ^ ^ ^ + | | | + +---------+ +---------+ +---------+ + | PCH-LPC | | Devices | | Devices | + +---------+ +---------+ +---------+ + ^ + | + +---------+ + | Devices | + +---------+ + +ACPI相关的定义 +============== + +CPUINTC:: + + ACPI_MADT_TYPE_CORE_PIC; + struct acpi_madt_core_pic; + enum acpi_madt_core_pic_version; + +LIOINTC:: + + ACPI_MADT_TYPE_LIO_PIC; + struct acpi_madt_lio_pic; + enum acpi_madt_lio_pic_version; + +EIOINTC:: + + ACPI_MADT_TYPE_EIO_PIC; + struct acpi_madt_eio_pic; + enum acpi_madt_eio_pic_version; + +HTVECINTC:: + + ACPI_MADT_TYPE_HT_PIC; + struct acpi_madt_ht_pic; + enum acpi_madt_ht_pic_version; + +PCH-PIC:: + + ACPI_MADT_TYPE_BIO_PIC; + struct acpi_madt_bio_pic; + enum acpi_madt_bio_pic_version; + +PCH-MSI:: + + ACPI_MADT_TYPE_MSI_PIC; + struct acpi_madt_msi_pic; + enum acpi_madt_msi_pic_version; + +PCH-LPC:: + + ACPI_MADT_TYPE_LPC_PIC; + struct acpi_madt_lpc_pic; + enum acpi_madt_lpc_pic_version; + +参考文献 +======== + +龙芯3A5000的文档： + + https://github.com/loongson/LoongArch-Documentation/releases/latest/download/Loongson-3A5000-usermanual-1.02-CN.pdf (中文版) + + https://github.com/loongson/LoongArch-Documentation/releases/latest/download/Loongson-3A5000-usermanual-1.02-EN.pdf (英文版) + +龙芯LS7A芯片组的文档： + + https://github.com/loongson/LoongArch-Documentation/releases/latest/download/Loongson-7A1000-usermanual-2.00-CN.pdf (中文版) + + https://github.com/loongson/LoongArch-Documentation/releases/latest/download/Loongson-7A1000-usermanual-2.00-EN.pdf (英文版) + +.. note:: + - CPUINTC：即《龙芯架构参考手册卷一》第7.4节所描述的CSR.ECFG/CSR.ESTAT寄存器及其 + 中断控制逻辑； + - LIOINTC：即《龙芯3A5000处理器使用手册》第11.1节所描述的“传统I/O中断”； + - EIOINTC：即《龙芯3A5000处理器使用手册》第11.2节所描述的“扩展I/O中断”； + - HTVECINTC：即《龙芯3A5000处理器使用手册》第14.3节所描述的“HyperTransport中断”； + - PCH-PIC/PCH-MSI：即《龙芯7A1000桥片用户手册》第5章所描述的“中断控制器”； + - PCH-LPC：即《龙芯7A1000桥片用户手册》第24.3节所描述的“LPC中断”。 -- cgit v1.2.3