1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include <arch/io.h>
#include "chip.h"
void vga_enable_console();
static int
mainboard_scan_bus(device_t root, int maxbus)
{
int retval;
printk_spew("%s: root %p maxbus %d\n", __FUNCTION__, root, maxbus);
retval = pci_scan_bus(root->bus, 0, 0xff, maxbus);
printk_spew("DONE %s: return %d\n", __FUNCTION__, maxbus);
return maxbus;
}
void vga_fixup(void) {
// we do this right here because:
// - all the hardware is working, and some VGA bioses seem to need
// that
// - we need page 0 below for linuxbios tables.
printk_debug("INSTALL REAL-MODE IDT\n");
setup_realmode_idt();
printk_debug("DO THE VGA BIOS\n");
do_vgabios();
post_code(0x93);
vga_enable_console();
}
void write_protect_vgabios(void)
{
device_t dev;
printk_info("write_protect_vgabios\n");
dev = dev_find_device(PCI_VENDOR_ID_VIA, 0x3123, 0);
if(dev)
pci_write_config8(dev, 0x61, 0xaa);
}
static void
enable(struct chip *chip, enum chip_pass pass)
{
struct mainboard_tyan_s4882_config *conf =
(struct mainboard_tyan_s4882_config *)chip->chip_info;
switch (pass) {
default: break;
// case CONF_PASS_PRE_CONSOLE:
// case CONF_PASS_PRE_PCI:
case CONF_PASS_POST_PCI:
// case CONF_PASS_PRE_BOOT:
// if (conf->fixup_scsi)
// onboard_scsi_fixup();
// if (conf->fixup_vga)
// vga_fixup();
printk_debug("mainboard fixup pass %d done\r\n",
pass);
break;
}
}
static struct device_operations mainboard_operations = {
.read_resources = root_dev_read_resources,
.set_resources = root_dev_set_resources,
.enable_resources = enable_childrens_resources,
.init = 0,
.scan_bus = mainboard_scan_bus,
.enable = 0,
};
static void enumerate(struct chip *chip)
{
struct chip *child;
dev_root.ops = &mainboard_operations;
chip->dev = &dev_root;
chip->bus = 0;
for(child = chip->children; child; child = child->next) {
child->bus = &dev_root.link[0];
}
}
struct chip_control mainboard_via_epia_m_control = {
.enumerate = enumerate,
.name = "VIA EPIA-M mainboard ",
.enable = enable
};
|
