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0aa87e15bb
Some extensions to the multi-level interrupt controller are required to support SoCs with more than four level 2 interrupt "aggregators". Extend existing support to allow at most 8 level 2 or level 3 aggregators. Use Kconfig macro templates to cut down on boilerplate. Try to clarify some aspects of the Kconfig help while we're at it, and change the type of options which count things or are table offsets from "hex" to "int", so that the generated .config is easier to read. Finally, make some improvements to gen_isr_tables.py while we are here. In particular, move some assignments around to cut down on duplicated work, don't check for symbols we know must exist, and improve the debug logging output's readability. Signed-off-by: Marti Bolivar <marti@foundries.io>
122 lines
3.7 KiB
Plaintext
122 lines
3.7 KiB
Plaintext
# Kconfig - Multilevel interrupt configuration
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#
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# Copyright (c) 2017 Intel Corporation
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# Copyright (c) 2018 Foundries.io
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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config MULTI_LEVEL_INTERRUPTS
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bool "Multi-level interrupt support"
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depends on GEN_SW_ISR_TABLE
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help
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Multiple levels of interrupts are normally used to increase the
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number of addressable interrupts in a system. For example, if two
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levels are used, a second level interrupt aggregator would combine
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all interrupts routed to it into one IRQ line in the first level
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interrupt controller. If three levels are used, a third level
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aggregator combines its input interrupts into one IRQ line at the
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second level. The number of interrupt levels is usually determined
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by the hardware. (The term "aggregator" here means "interrupt
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controller".)
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config MAX_IRQ_PER_AGGREGATOR
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int "Max IRQs per interrupt aggregator"
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default 0
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depends on MULTI_LEVEL_INTERRUPTS
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help
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The maximum number of interrupt inputs to any aggregator in the
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system.
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config 2ND_LEVEL_INTERRUPTS
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bool "Second-level interrupt support"
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depends on MULTI_LEVEL_INTERRUPTS
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help
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Second level interrupts are used to increase the number of
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addressable interrupts in a system.
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config 2ND_LVL_ISR_TBL_OFFSET
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int "Offset in _sw_isr_table for level 2 interrupts"
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default 0
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depends on 2ND_LEVEL_INTERRUPTS
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help
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This is the offset in _sw_isr_table, the generated ISR handler table,
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where storage for 2nd level interrupt ISRs begins. This is
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typically allocated after ISRs for level 1 interrupts.
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config NUM_2ND_LEVEL_AGGREGATORS
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int "Total number of second level interrupt aggregators"
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range 1 8
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default 1
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depends on 2ND_LEVEL_INTERRUPTS
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help
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The number of level 2 interrupt aggregators to support. Each
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aggregator can manage at most MAX_IRQ_PER_AGGREGATOR level 2
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interrupts.
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prev-level-num = 1
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cur-level-num = 2
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cur-level = 2ND
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aggregator = 0
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rsource "Kconfig.multilevel.aggregator_template"
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aggregator = 1
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rsource "Kconfig.multilevel.aggregator_template"
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aggregator = 2
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rsource "Kconfig.multilevel.aggregator_template"
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aggregator = 3
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rsource "Kconfig.multilevel.aggregator_template"
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aggregator = 4
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rsource "Kconfig.multilevel.aggregator_template"
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aggregator = 5
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rsource "Kconfig.multilevel.aggregator_template"
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aggregator = 6
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rsource "Kconfig.multilevel.aggregator_template"
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aggregator = 7
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rsource "Kconfig.multilevel.aggregator_template"
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config 3RD_LEVEL_INTERRUPTS
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bool "Third-level interrupt support"
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depends on 2ND_LEVEL_INTERRUPTS
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help
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Third level interrupts are used to increase the number of
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addressable interrupts in a system.
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config NUM_3RD_LEVEL_AGGREGATORS
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int "Total number of third level interrupt aggregators"
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range 1 8
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default 1
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depends on 3RD_LEVEL_INTERRUPTS
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help
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The number of level 3 interrupt aggregators to support. Each
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aggregator can manage at most MAX_IRQ_PER_AGGREGATOR level 3
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interrupts.
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config 3RD_LVL_ISR_TBL_OFFSET
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int "Offset in _sw_isr_table for level 3 interrupts"
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default 0
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depends on 3RD_LEVEL_INTERRUPTS
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help
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This is the offset in _sw_isr_table, the generated ISR handler table,
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where storage for 3rd level interrupt ISRs begins. This is
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typically allocated after ISRs for level 2 interrupts.
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prev-level-num = 2
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cur-level-num = 3
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cur-level = 3RD
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aggregator = 0
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rsource "Kconfig.multilevel.aggregator_template"
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aggregator = 1
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rsource "Kconfig.multilevel.aggregator_template"
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aggregator = 2
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rsource "Kconfig.multilevel.aggregator_template"
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aggregator = 3
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rsource "Kconfig.multilevel.aggregator_template"
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aggregator = 4
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rsource "Kconfig.multilevel.aggregator_template"
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aggregator = 5
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rsource "Kconfig.multilevel.aggregator_template"
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aggregator = 6
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rsource "Kconfig.multilevel.aggregator_template"
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aggregator = 7
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rsource "Kconfig.multilevel.aggregator_template"
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