source: trunk/hal/x86_64/drivers/pic_apic.c @ 457

Last change on this file since 457 was 457, checked in by alain, 3 years ago

This version modifies the exec syscall and fixes a large number of small bugs.
The version number has been updated (0.1)

File size: 3.8 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_kernel_types.h>
23#include <chdev.h>
24#include <pic_apic.h>
25#include <errno.h>
26#include <string.h>
27#include <printk.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}
97
98void pic_apic_enable_irq(lid_t lid, xptr_t src_chdev_xp)
99{
100        chdev_t *src_chdev = (chdev_t *)src_chdev_xp;
101        uint32_t func = src_chdev->func;
102        uint32_t channel = src_chdev->channel;
103        uint32_t irq_id;
104
105        /* get external IRQ index */
106        if (func == DEV_FUNC_IOC)
107                irq_id = iopic_input.ioc[channel];
108        else if (func == DEV_FUNC_TXT)
109                irq_id = iopic_input.txt[channel];
110        else
111                assert(false, __FUNCTION__, "unsupported device\n");
112
113        /* enable the line */
114        hal_ioapic_enable_irq(irq_id);
115}
116
117void pic_apic_disable_irq(lid_t lid, xptr_t src_chdev_xp)
118{
119        chdev_t *src_chdev = (chdev_t *)src_chdev_xp;
120        uint32_t func = src_chdev->func;
121        uint32_t channel = src_chdev->channel;
122        uint32_t irq_id;
123
124        /* get external IRQ index */
125        if (func == DEV_FUNC_IOC)
126                irq_id = iopic_input.ioc[channel];
127        else if (func == DEV_FUNC_TXT)
128                irq_id = iopic_input.txt[channel];
129        else
130                assert(false, __FUNCTION__, "unsupported device\n");
131
132        /* disable the line */
133        hal_ioapic_disable_irq(irq_id);
134}
135
136void pic_apic_enable_timer(uint32_t period)
137{
138        /*
139         * TODO: right now, we don't do anything, because the LAPIC is already
140         * calibrated and launched earlier, mostly for debugging purposes. But it
141         * would be good to launch it here for real.
142         */
143}
144
145void pic_apic_enable_ipi()
146{
147        /* TODO */
148//      x86_panic((char *)__func__);
149}
150
151void pic_apic_send_ipi(cxy_t cxy, lid_t lid)
152{
153        x86_panic((char *)__func__);
154}
Note: See TracBrowser for help on using the repository browser.