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// #################################################################################################
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// #################################################################################################
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// # << NEORV32: neorv32_xirq.c - External Interrupt controller HW Driver >> #
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// # << NEORV32: neorv32_xirq.c - External Interrupt controller HW Driver >> #
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// # ********************************************************************************************* #
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// # ********************************************************************************************* #
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// # BSD 3-Clause License #
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// # BSD 3-Clause License #
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// # #
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// # #
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// # Copyright (c) 2021, Stephan Nolting. All rights reserved. #
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// # Copyright (c) 2022, Stephan Nolting. All rights reserved. #
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// # #
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// # #
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// # Redistribution and use in source and binary forms, with or without modification, are #
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// # Redistribution and use in source and binary forms, with or without modification, are #
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// # permitted provided that the following conditions are met: #
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// # permitted provided that the following conditions are met: #
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// # #
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// # #
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// # 1. Redistributions of source code must retain the above copyright notice, this list of #
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// # 1. Redistributions of source code must retain the above copyright notice, this list of #
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register uint32_t src = NEORV32_XIRQ.SCR; // get IRQ source (with highest priority)
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register uint32_t src = NEORV32_XIRQ.SCR; // get IRQ source (with highest priority)
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uint32_t mask = 1 << src;
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uint32_t mask = 1 << src;
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NEORV32_XIRQ.IPR = ~mask; // clear current pending interrupt
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NEORV32_XIRQ.IPR = ~mask; // clear current pending interrupt
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neorv32_cpu_csr_write(CSR_MIP, 1 << XIRQ_FIRQ_PENDING); // acknowledge XIRQ FIRQ
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neorv32_cpu_csr_write(CSR_MIP, ~(1 << XIRQ_FIRQ_PENDING)); // acknowledge XIRQ FIRQ
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NEORV32_XIRQ.SCR = 0; // acknowledge current XIRQ interrupt source
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NEORV32_XIRQ.SCR = 0; // acknowledge current XIRQ interrupt source
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// execute handler
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// execute handler
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register uint32_t xirq_handler = __neorv32_xirq_vector_lut[src];
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register uint32_t xirq_handler = __neorv32_xirq_vector_lut[src];
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