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
98
99
100
101
102
103
104
|
/* SPDX-License-Identifier: GPL-2.0-only */
#include <device/mmio.h>
#include <bootstate.h>
#include <console/console.h>
#include <amdblocks/psp.h>
#include <soc/iomap.h>
#include "psp_def.h"
static const char *psp_status_nobase = "error: PSP_ADDR_MSR and PSP BAR3 not assigned";
static const char *psp_status_halted = "error: PSP in halted state";
static const char *psp_status_recovery = "error: PSP recovery required";
static const char *psp_status_errcmd = "error sending command";
static const char *psp_status_init_timeout = "error: PSP init timeout";
static const char *psp_status_cmd_timeout = "error: PSP command timeout";
static const char *psp_status_noerror = "";
static const char *status_to_string(int err)
{
switch (err) {
case -PSPSTS_NOBASE:
return psp_status_nobase;
case -PSPSTS_HALTED:
return psp_status_halted;
case -PSPSTS_RECOVERY:
return psp_status_recovery;
case -PSPSTS_SEND_ERROR:
return psp_status_errcmd;
case -PSPSTS_INIT_TIMEOUT:
return psp_status_init_timeout;
case -PSPSTS_CMD_TIMEOUT:
return psp_status_cmd_timeout;
default:
return psp_status_noerror;
}
}
static u32 rd_resp_sts(struct mbox_buffer_header *header)
{
return read32(&header->status);
}
/*
* Print meaningful status to the console. Caller only passes a pointer to a
* buffer header if it's expected to contain its own status.
*/
void psp_print_cmd_status(int cmd_status, struct mbox_buffer_header *header)
{
if (header && rd_resp_sts(header))
printk(BIOS_DEBUG, "buffer status=0x%x ", rd_resp_sts(header));
if (cmd_status)
printk(BIOS_WARNING, "%s\n", status_to_string(cmd_status));
else
printk(BIOS_DEBUG, "OK\n");
}
/*
* Notify the PSP that DRAM is present. Upon receiving this command, the PSP
* will load its OS into fenced DRAM that is not accessible to the x86 cores.
*/
int psp_notify_dram(void)
{
int cmd_status;
struct mbox_default_buffer buffer = {
.header = {
.size = sizeof(buffer)
}
};
printk(BIOS_DEBUG, "PSP: Notify that DRAM is available... ");
cmd_status = send_psp_command(MBOX_BIOS_CMD_DRAM_INFO, &buffer);
/* buffer's status shouldn't change but report it if it does */
psp_print_cmd_status(cmd_status, &buffer.header);
return cmd_status;
}
/*
* Notify the PSP that the system is completing the boot process. Upon
* receiving this command, the PSP will only honor commands where the buffer
* is in SMM space.
*/
static void psp_notify_boot_done(void *unused)
{
int cmd_status;
struct mbox_default_buffer buffer = {
.header = {
.size = sizeof(buffer)
}
};
printk(BIOS_DEBUG, "PSP: Notify that POST is finishing... ");
cmd_status = send_psp_command(MBOX_BIOS_CMD_BOOT_DONE, &buffer);
/* buffer's status shouldn't change but report it if it does */
psp_print_cmd_status(cmd_status, &buffer.header);
}
BOOT_STATE_INIT_ENTRY(BS_PAYLOAD_BOOT, BS_ON_ENTRY,
psp_notify_boot_done, NULL);
|
