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2fefff34a7
Gloabal variable should be declared constant wherever possible to avoid unintentional modification. Tracked-On: #861 Signed-off-by: Kaige Fu <kaige.fu@intel.com> Acked-by: Eddie Dong <eddie.dong@intel.com>
74 lines
1.6 KiB
C
74 lines
1.6 KiB
C
/*
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* Copyright (C) 2018 Intel Corporation. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef IOAPIC_H
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#define IOAPIC_H
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#include <bsp_extern.h>
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/*
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* IOAPIC_MAX_LINES is architecturally defined.
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* The usable RTEs may be a subset of the total on a per IO APIC basis.
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*/
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#define IOAPIC_MAX_LINES 120U
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#define NR_LEGACY_IRQ 16U
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#define NR_LEGACY_PIN NR_LEGACY_IRQ
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#define NR_MAX_GSI (NR_IOAPICS * IOAPIC_MAX_LINES)
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void setup_ioapic_irqs(void);
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bool irq_is_gsi(uint32_t irq);
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uint8_t irq_to_pin(uint32_t irq);
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/**
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* @brief Get irq num from pin num
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*
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* @param[in] pin The pin number
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*/
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uint32_t pin_to_irq(uint8_t pin);
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/**
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* @brief Set the redirection table entry
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*
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* Set the redirection table entry of an interrupt
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*
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* @param[in] irq The number of irq to set
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* @param[in] rte Union of ioapic_rte to set
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*/
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void ioapic_set_rte(uint32_t irq, union ioapic_rte rte);
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/**
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* @brief Get the redirection table entry
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*
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* Get the redirection table entry of an interrupt
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*
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* @param[in] irq The number of irq to fetch RTE
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* @param[inout] rte Pointer to union ioapic_rte to return result RTE
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*
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* @pre rte != NULL
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*/
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void ioapic_get_rte(uint32_t irq, union ioapic_rte *rte);
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void suspend_ioapic(void);
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void resume_ioapic(void);
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void gsi_mask_irq(uint32_t irq);
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void gsi_unmask_irq(uint32_t irq);
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void ioapic_get_rte_entry(void *ioapic_addr, uint8_t pin, union ioapic_rte *rte);
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struct gsi_table {
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uint8_t ioapic_id;
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uint8_t pin;
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void *addr;
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};
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extern struct gsi_table gsi_table[NR_MAX_GSI];
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extern uint32_t nr_gsi;
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extern const uint8_t pic_ioapic_pin_map[NR_LEGACY_PIN];
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#endif /* IOAPIC_H */
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