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
|
/* SPDX-License-Identifier: GPL-2.0-only */
#include <types.h>
#include <console/console.h>
#include <cpu/x86/smm.h>
#include <device/pci_def.h>
#include <southbridge/intel/common/pmutil.h>
#include "i82801jx.h"
#include "nvs.h"
/* While we read PMBASE dynamically in case it changed, let's
* initialize it with a sane value
*/
u16 pmbase = DEFAULT_PMBASE;
int southbridge_io_trap_handler(int smif)
{
switch (smif) {
case 0x32:
printk(BIOS_DEBUG, "OS Init\n");
/* gnvs->smif:
* On success, the IO Trap Handler returns 0
* On failure, the IO Trap Handler returns a value != 0
*/
gnvs->smif = 0;
return 1; /* IO trap handled */
}
/* Not handled */
return 0;
}
void southbridge_smi_monitor(void)
{
#define IOTRAP(x) (trap_sts & (1 << x))
u32 trap_sts, trap_cycle;
u32 data, mask = 0;
int i;
trap_sts = RCBA32(0x1e00); // TRSR - Trap Status Register
RCBA32(0x1e00) = trap_sts; // Clear trap(s) in TRSR
trap_cycle = RCBA32(0x1e10);
for (i=16; i<20; i++) {
if (trap_cycle & (1 << i))
mask |= (0xff << ((i - 16) << 3));
}
/* IOTRAP(3) SMI function call */
if (IOTRAP(3)) {
if (gnvs && gnvs->smif)
io_trap_handler(gnvs->smif); // call function smif
return;
}
/* IOTRAP(2) currently unused
* IOTRAP(1) currently unused */
/* IOTRAP(0) SMIC */
if (IOTRAP(0)) {
if (!(trap_cycle & (1 << 24))) { // It's a write
printk(BIOS_DEBUG, "SMI1 command\n");
data = RCBA32(0x1e18);
data &= mask;
// if (smi1)
// southbridge_smi_command(data);
// return;
}
// Fall through to debug
}
printk(BIOS_DEBUG, " trapped io address = 0x%x\n", trap_cycle & 0xfffc);
for (i=0; i < 4; i++) if (IOTRAP(i)) printk(BIOS_DEBUG, " TRAP = %d\n", i);
printk(BIOS_DEBUG, " AHBE = %x\n", (trap_cycle >> 16) & 0xf);
printk(BIOS_DEBUG, " MASK = 0x%08x\n", mask);
printk(BIOS_DEBUG, " read/write: %s\n", (trap_cycle & (1 << 24)) ? "read" : "write");
if (!(trap_cycle & (1 << 24))) {
/* Write Cycle */
data = RCBA32(0x1e18);
printk(BIOS_DEBUG, " iotrap written data = 0x%08x\n", data);
}
#undef IOTRAP
}
void southbridge_finalize_all(void)
{
}
|
