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
|
/*
* Author: Andy Fleming <afleming@freescale.com>
* Kumar Gala <galak@kernel.crashing.org>
*
* Copyright 2006-2008 Freescale Semiconductor Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/of.h>
#include <asm/machdep.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/mpic.h>
#include <asm/cacheflush.h>
#include <sysdev/fsl_soc.h>
extern volatile unsigned long __secondary_hold_acknowledge;
extern void __early_start(void);
#define BOOT_ENTRY_ADDR_UPPER 0
#define BOOT_ENTRY_ADDR_LOWER 1
#define BOOT_ENTRY_R3_UPPER 2
#define BOOT_ENTRY_R3_LOWER 3
#define BOOT_ENTRY_RESV 4
#define BOOT_ENTRY_PIR 5
#define BOOT_ENTRY_R6_UPPER 6
#define BOOT_ENTRY_R6_LOWER 7
#define NUM_BOOT_ENTRY 8
#define SIZE_BOOT_ENTRY (NUM_BOOT_ENTRY * sizeof(u32))
static void __init
smp_85xx_kick_cpu(int nr)
{
unsigned long flags;
const u64 *cpu_rel_addr;
__iomem u32 *bptr_vaddr;
struct device_node *np;
int n = 0;
WARN_ON (nr < 0 || nr >= NR_CPUS);
pr_debug("smp_85xx_kick_cpu: kick CPU #%d\n", nr);
local_irq_save(flags);
np = of_get_cpu_node(nr, NULL);
cpu_rel_addr = of_get_property(np, "cpu-release-addr", NULL);
if (cpu_rel_addr == NULL) {
printk(KERN_ERR "No cpu-release-addr for cpu %d\n", nr);
return;
}
/* Map the spin table */
bptr_vaddr = ioremap(*cpu_rel_addr, SIZE_BOOT_ENTRY);
out_be32(bptr_vaddr + BOOT_ENTRY_PIR, nr);
out_be32(bptr_vaddr + BOOT_ENTRY_ADDR_LOWER, __pa(__early_start));
/* Wait a bit for the CPU to ack. */
while ((__secondary_hold_acknowledge != nr) && (++n < 1000))
mdelay(1);
iounmap(bptr_vaddr);
local_irq_restore(flags);
pr_debug("waited %d msecs for CPU #%d.\n", n, nr);
}
static void __init
smp_85xx_setup_cpu(int cpu_nr)
{
mpic_setup_this_cpu();
/* Clear any pending timer interrupts */
mtspr(SPRN_TSR, TSR_ENW | TSR_WIS | TSR_DIS | TSR_FIS);
/* Enable decrementer interrupt */
mtspr(SPRN_TCR, TCR_DIE);
}
struct smp_ops_t smp_85xx_ops = {
.message_pass = smp_mpic_message_pass,
.probe = smp_mpic_probe,
.kick_cpu = smp_85xx_kick_cpu,
.setup_cpu = smp_85xx_setup_cpu,
};
void __init
mpc85xx_smp_init(void)
{
smp_ops = &smp_85xx_ops;
}
|
