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
|
/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <soc/qcom/scm.h>
#include <soc/qcom/scm-boot.h>
#define SCM_FLAG_WARMBOOT_CPU0 0x04
#define SCM_FLAG_WARMBOOT_CPU1 0x02
#define SCM_FLAG_WARMBOOT_CPU2 0x10
#define SCM_FLAG_WARMBOOT_CPU3 0x40
struct scm_warmboot {
int flag;
void *entry;
};
static struct scm_warmboot scm_flags[] = {
{ .flag = SCM_FLAG_WARMBOOT_CPU0 },
{ .flag = SCM_FLAG_WARMBOOT_CPU1 },
{ .flag = SCM_FLAG_WARMBOOT_CPU2 },
{ .flag = SCM_FLAG_WARMBOOT_CPU3 },
};
/*
* Set the cold/warm boot address for one of the CPU cores.
*/
int scm_set_boot_addr(phys_addr_t addr, int flags)
{
struct {
unsigned int flags;
phys_addr_t addr;
} cmd;
cmd.addr = addr;
cmd.flags = flags;
return scm_call(SCM_SVC_BOOT, SCM_BOOT_ADDR,
&cmd, sizeof(cmd), NULL, 0);
}
EXPORT_SYMBOL(scm_set_boot_addr);
int scm_set_warm_boot_addr(void *entry, int cpu)
{
int ret;
/*
* Reassign only if we are switching from hotplug entry point
* to cpuidle entry point or vice versa.
*/
if (entry == scm_flags[cpu].entry)
return 0;
ret = scm_set_boot_addr(virt_to_phys(entry), scm_flags[cpu].flag);
if (!ret)
scm_flags[cpu].entry = entry;
return ret;
}
|
