source: trunk/hal/x86_64/drivers/pic_apic.c @ 280

Last change on this file since 280 was 280, checked in by max@…, 4 years ago

sync

File size: 3.7 KB
Line 
1/*
2 * pic_apic.c - APIC PIC driver implementation
3 *
4 * Copyright (c) 2017 Maxime Villard
5 *
6 * This file is part of ALMOS-MKH.
7 *
8 * ALMOS-MKH is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; version 2.0 of the License.
11 *
12 * ALMOS-MKH is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with ALMOS-MKH; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22#include <hal_types.h>
23#include <chdev.h>
24#include <pic_apic.h>
25#include <errno.h>
26#include <string.h>
27#include <vfs.h>
28
29#include <hal_internal.h>
30#include <hal_segmentation.h>
31#include <hal_apic.h>
32
33extern iopic_input_t iopic_input;
34
35static void
36idt_set_seg(struct idt_seg *seg, void *func, int ist, int type, int dpl, int sel)
37{
38        seg->gd_looffset = (uint64_t)func & 0xffff;
39        seg->gd_selector = sel;
40        seg->gd_ist = ist;
41        seg->gd_type = type;
42        seg->gd_dpl = dpl;
43        seg->gd_p = 1;
44        seg->gd_hioffset = (uint64_t)func >> 16;
45        seg->gd_zero = 0;
46        seg->gd_xx1 = 0;
47        seg->gd_xx2 = 0;
48        seg->gd_xx3 = 0;
49}
50
51/* -------------------------------------------------------------------------- */
52
53extern uint8_t *idtstore;
54
55void pic_apic_init(chdev_t *pic)
56{
57        /* XXX APIC already initialized earlier */
58}
59
60void pic_apic_extend_init(uint32_t *xcu_base)
61{
62        x86_panic((char *)__func__);
63}
64
65void pic_apic_bind_irq(lid_t lid, chdev_t *src_chdev)
66{
67        struct idt_seg seg, *idt;
68        void *isr;
69        int slot;
70
71        /* get the source chdev functional type, channel, and direction */
72        uint32_t func    = src_chdev->func;
73        uint32_t channel = src_chdev->channel;
74
75        /* get external IRQ index */
76        uint32_t irq_id;
77        if (func == DEV_FUNC_IOC)
78                irq_id = iopic_input.ioc[channel];
79        else if (func == DEV_FUNC_TXT)
80                irq_id = iopic_input.txt[channel];
81        else
82                assert(false, __FUNCTION__, "unsupported device\n");
83
84        /* get the ISR pointer */
85        isr = src_chdev->isr;
86
87        /* create the IDT entry, and register it */
88        idt_set_seg(&seg, isr, 0, SDT_SYS386IGT, SEL_KPL,
89            GDT_FIXED_SEL(GDT_KCODE_SEL, SEL_KPL));
90        slot = idt_slot_alloc();
91        idt = (struct idt_seg *)&idtstore;
92        memcpy(&idt[slot], &seg, sizeof(struct idt_seg));
93
94        /* Bind the IRQ line in IOAPIC */
95        hal_ioapic_bind_irq(irq_id, slot, lid);
96
97x86_printf("-> allocated %z\n", (uint64_t)slot);
98}
99
100void pic_apic_enable_irq(lid_t lid, xptr_t src_chdev_xp)
101{
102        chdev_t *src_chdev = (chdev_t *)src_chdev_xp;
103        uint32_t func = src_chdev->func;
104        uint32_t channel = src_chdev->channel;
105        uint32_t irq_id;
106
107        /* get external IRQ index */
108        if (func == DEV_FUNC_IOC)
109                irq_id = iopic_input.ioc[channel];
110        else if (func == DEV_FUNC_TXT)
111                irq_id = iopic_input.txt[channel];
112        else
113                assert(false, __FUNCTION__, "unsupported device\n");
114
115        /* enable the line */
116        hal_ioapic_enable_irq(irq_id);
117}
118
119void pic_apic_disable_irq(lid_t lid, xptr_t src_chdev_xp)
120{
121        chdev_t *src_chdev = (chdev_t *)src_chdev_xp;
122        uint32_t func = src_chdev->func;
123        uint32_t channel = src_chdev->channel;
124        uint32_t irq_id;
125
126        /* get external IRQ index */
127        if (func == DEV_FUNC_IOC)
128                irq_id = iopic_input.ioc[channel];
129        else if (func == DEV_FUNC_TXT)
130                irq_id = iopic_input.txt[channel];
131        else
132                assert(false, __FUNCTION__, "unsupported device\n");
133
134        /* disable the line */
135        hal_ioapic_disable_irq(irq_id);
136}
137
138void pic_apic_enable_timer(uint32_t period)
139{
140        x86_panic((char *)__func__);
141}
142
143void pic_apic_enable_ipi()
144{
145        x86_panic((char *)__func__);
146}
147
148void pic_apic_send_ipi(cxy_t cxy, lid_t lid)
149{
150        x86_panic((char *)__func__);
151}
Note: See TracBrowser for help on using the repository browser.