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
105
|
/*
* MSP71xx Platform-specific hooks for SMP operation
*/
#include <linux/irq.h>
#include <linux/init.h>
#include <asm/mipsmtregs.h>
#include <asm/mipsregs.h>
#include <asm/smtc.h>
#include <asm/smtc_ipi.h>
/* VPE/SMP Prototype implements platform interfaces directly */
/*
* Cause the specified action to be performed on a targeted "CPU"
*/
static void msp_smtc_send_ipi_single(int cpu, unsigned int action)
{
/* "CPU" may be TC of same VPE, VPE of same CPU, or different CPU */
smtc_send_ipi(cpu, LINUX_SMP_IPI, action);
}
static void msp_smtc_send_ipi_mask(const struct cpumask *mask,
unsigned int action)
{
unsigned int i;
for_each_cpu(i, mask)
msp_smtc_send_ipi_single(i, action);
}
/*
* Post-config but pre-boot cleanup entry point
*/
static void __cpuinit msp_smtc_init_secondary(void)
{
int myvpe;
/* Don't enable Malta I/O interrupts (IP2) for secondary VPEs */
myvpe = read_c0_tcbind() & TCBIND_CURVPE;
if (myvpe > 0)
change_c0_status(ST0_IM, STATUSF_IP0 | STATUSF_IP1 |
STATUSF_IP6 | STATUSF_IP7);
smtc_init_secondary();
}
/*
* Platform "CPU" startup hook
*/
static void __cpuinit msp_smtc_boot_secondary(int cpu,
struct task_struct *idle)
{
smtc_boot_secondary(cpu, idle);
}
/*
* SMP initialization finalization entry point
*/
static void __cpuinit msp_smtc_smp_finish(void)
{
smtc_smp_finish();
}
/*
* Hook for after all CPUs are online
*/
static void msp_smtc_cpus_done(void)
{
}
/*
* Platform SMP pre-initialization
*
* As noted above, we can assume a single CPU for now
* but it may be multithreaded.
*/
static void __init msp_smtc_smp_setup(void)
{
/*
* we won't get the definitive value until
* we've run smtc_prepare_cpus later, but
*/
if (read_c0_config3() & (1 << 2))
smp_num_siblings = smtc_build_cpu_map(0);
}
static void __init msp_smtc_prepare_cpus(unsigned int max_cpus)
{
smtc_prepare_cpus(max_cpus);
}
struct plat_smp_ops msp_smtc_smp_ops = {
.send_ipi_single = msp_smtc_send_ipi_single,
.send_ipi_mask = msp_smtc_send_ipi_mask,
.init_secondary = msp_smtc_init_secondary,
.smp_finish = msp_smtc_smp_finish,
.cpus_done = msp_smtc_cpus_done,
.boot_secondary = msp_smtc_boot_secondary,
.smp_setup = msp_smtc_smp_setup,
.prepare_cpus = msp_smtc_prepare_cpus,
};
|
