1 /*
2 * Copyright (c) 2013-2015, Wind River Systems, Inc.
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7 /**
8 * @file
9 * @brief system module for variants with LOAPIC
10 *
11 */
12
13 #include <zephyr/sys/__assert.h>
14 #include <zephyr/kernel.h>
15 #include <zephyr/arch/cpu.h>
16 #include <zephyr/drivers/interrupt_controller/ioapic.h>
17 #include <zephyr/drivers/interrupt_controller/loapic.h>
18 #include <zephyr/drivers/interrupt_controller/sysapic.h>
19 #include <zephyr/irq.h>
20 #include <zephyr/linker/sections.h>
21
22 #define IS_IOAPIC_IRQ(irq) ((irq) < z_loapic_irq_base())
23 #define HARDWARE_IRQ_LIMIT ((z_loapic_irq_base() + LOAPIC_IRQ_COUNT) - 1)
24
25 /**
26 * @brief Program interrupt controller
27 *
28 * This routine programs the interrupt controller with the given vector
29 * based on the given IRQ parameter.
30 *
31 * Drivers call this routine instead of IRQ_CONNECT() when interrupts are
32 * configured statically.
33 *
34 * The Galileo board virtualizes IRQs as follows:
35 *
36 * - The first z_ioapic_num_rtes() IRQs are provided by the IOAPIC so the
37 * IOAPIC is programmed for these IRQs
38 * - The remaining IRQs are provided by the LOAPIC and hence the LOAPIC is
39 * programmed.
40 *
41 * @param vector the vector number
42 * @param irq the virtualized IRQ
43 * @param flags interrupt flags
44 */
45 __boot_func
z_irq_controller_irq_config(unsigned int vector,unsigned int irq,uint32_t flags)46 void z_irq_controller_irq_config(unsigned int vector, unsigned int irq,
47 uint32_t flags)
48 {
49 __ASSERT(irq <= HARDWARE_IRQ_LIMIT, "invalid irq line");
50
51 if (IS_IOAPIC_IRQ(irq)) {
52 z_ioapic_irq_set(irq, vector, flags);
53 } else {
54 z_loapic_int_vec_set(irq - z_loapic_irq_base(), vector);
55 }
56 }
57
58 /**
59 * @brief Enable an individual interrupt (IRQ)
60 *
61 * The public interface for enabling/disabling a specific IRQ for the IA-32
62 * architecture is defined as follows in include/arch/x86/arch.h
63 *
64 * extern void irq_enable (unsigned int irq);
65 * extern void irq_disable (unsigned int irq);
66 *
67 * The irq_enable() routine is provided by the interrupt controller driver due
68 * to the IRQ virtualization that is performed by this platform. See the
69 * comments in _interrupt_vector_allocate() for more information regarding IRQ
70 * virtualization.
71 */
72 __pinned_func
arch_irq_enable(unsigned int irq)73 void arch_irq_enable(unsigned int irq)
74 {
75 if (IS_IOAPIC_IRQ(irq)) {
76 z_ioapic_irq_enable(irq);
77 } else {
78 z_loapic_irq_enable(irq - z_loapic_irq_base());
79 }
80 }
81
82 /**
83 * @brief Disable an individual interrupt (IRQ)
84 *
85 * The irq_disable() routine is provided by the interrupt controller driver due
86 * to the IRQ virtualization that is performed by this platform. See the
87 * comments in _interrupt_vector_allocate() for more information regarding IRQ
88 * virtualization.
89 */
90 __pinned_func
arch_irq_disable(unsigned int irq)91 void arch_irq_disable(unsigned int irq)
92 {
93 if (IS_IOAPIC_IRQ(irq)) {
94 z_ioapic_irq_disable(irq);
95 } else {
96 z_loapic_irq_disable(irq - z_loapic_irq_base());
97 }
98 }
99
