blob: 688dd5fd814612783cdb5174de78ac4002057dbe (
plain)
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
|
/* SPDX-License-Identifier: GPL-2.0-only */
#define __SIMPLE_DEVICE__
#include <types.h>
#include <commonlib/helpers.h>
#include <device/device.h>
#include <device/pci_ops.h>
#include "ironlake.h"
static int decode_pcie_bar(u32 *const base, u32 *const len)
{
*base = 0;
*len = 0;
const u32 pciexbar_reg = pci_read_config32(QPI_SAD, SAD_PCIEXBAR);
if (!(pciexbar_reg & (1 << 0)))
return 0;
switch ((pciexbar_reg >> 1) & 3) {
case 0: /* 256MB */
*base = pciexbar_reg & (0x0f << 28);
*len = 256 * MiB;
return 1;
case 1: /* 128M */
*base = pciexbar_reg & (0x1f << 27);
*len = 128 * MiB;
return 1;
case 2: /* 64M */
*base = pciexbar_reg & (0x3f << 26);
*len = 64 * MiB;
return 1;
}
return 0;
}
unsigned long acpi_fill_mcfg(unsigned long current)
{
u32 length, pciexbar;
if (!decode_pcie_bar(&pciexbar, &length))
return current;
const int max_buses = length / MiB;
current += acpi_create_mcfg_mmconfig((acpi_mcfg_mmconfig_t *) current,
pciexbar, 0x0, 0x0, max_buses - 1);
return current;
}
|
