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Viewing changes to arch/sparc/kernel/sun4d_smp.c

  • Committer: Bazaar Package Importer
  • Author(s): Ben Hutchings, Ben Hutchings, Aurelien Jarno
  • Date: 2011-06-07 12:14:05 UTC
  • mfrom: (43.1.9 sid)
  • Revision ID: james.westby@ubuntu.com-20110607121405-i3h1rd7nrnd2b73h
Tags: 2.6.39-2
http://bugs.debian.org/627492
http://bugs.debian.org/596626
http://bugs.debian.org/628932
http://bugs.debian.org/628191
http://bugs.debian.org/627837
http://bugs.debian.org/622997
http://bugs.debian.org/622745
http://bugs.debian.org/619827
http://bugs.debian.org/629401
[ Ben Hutchings ]
* [x86] Enable BACKLIGHT_APPLE, replacing BACKLIGHT_MBP_NVIDIA
  (Closes: #627492)
* cgroups: Disable memory resource controller by default. Allow it
  to be enabled using kernel parameter 'cgroup_enable=memory'.
* rt2800usb: Enable support for more USB devices including
  Linksys WUSB600N (Closes: #596626) (this change was accidentally
  omitted from 2.6.39-1)
* [x86] Remove Celeron from list of processors supporting PAE. Most
  'Celeron M' models do not.
* Update debconf template translations:
  - Swedish (Martin Bagge) (Closes: #628932)
  - French (David Prévot) (Closes: #628191)
* aufs: Update for 2.6.39 (Closes: #627837)
* Add stable 2.6.39.1, including:
  - ext4: dont set PageUptodate in ext4_end_bio()
  - pata_cmd64x: fix boot crash on parisc (Closes: #622997, #622745)
  - ext3: Fix fs corruption when make_indexed_dir() fails
  - netfilter: nf_ct_sip: validate Content-Length in TCP SIP messages
  - sctp: fix race between sctp_bind_addr_free() and
    sctp_bind_addr_conflict()
  - sctp: fix memory leak of the ASCONF queue when free asoc
  - md/bitmap: fix saving of events_cleared and other state
  - cdc_acm: Fix oops when Droids MuIn LCD is connected
  - cx88: Fix conversion from BKL to fine-grained locks (Closes: #619827)
  - keys: Set cred->user_ns in key_replace_session_keyring (CVE-2011-2184)
  - tmpfs: fix race between truncate and writepage
  - nfs41: Correct offset for LAYOUTCOMMIT
  - xen/mmu: fix a race window causing leave_mm BUG()
  - ext4: fix possible use-after-free in ext4_remove_li_request()
  For the complete list of changes, see:
   http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39.1
* Bump ABI to 2
* netfilter: Enable IP_SET, IP_SET_BITMAP_IP, IP_SET_BITMAP_IPMAC,
  IP_SET_BITMAP_PORT, IP_SET_HASH_IP, IP_SET_HASH_IPPORT,
  IP_SET_HASH_IPPORTIP, IP_SET_HASH_IPPORTNET, IP_SET_HASH_NET,
  IP_SET_HASH_NETPORT, IP_SET_LIST_SET, NETFILTER_XT_SET as modules
  (Closes: #629401)

[ Aurelien Jarno ]
* [mipsel/loongson-2f] Disable_SCSI_LPFC to workaround GCC ICE.

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Lines of Context:
arch/sparc/kernel/sun4d_smp.c
1
 
/* sun4d_smp.c: Sparc SS1000/SC2000 SMP support.
 
1
/* Sparc SS1000/SC2000 SMP support.
2
2
 *
3
3
 * Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
4
4
 *
6
6
 * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
7
7
 */
8
8
 
9
 
#include <asm/head.h>
10
 
 
11
 
#include <linux/kernel.h>
12
 
#include <linux/sched.h>
13
 
#include <linux/threads.h>
14
 
#include <linux/smp.h>
15
9
#include <linux/interrupt.h>
16
 
#include <linux/kernel_stat.h>
17
 
#include <linux/init.h>
18
 
#include <linux/spinlock.h>
19
 
#include <linux/mm.h>
20
 
#include <linux/swap.h>
21
10
#include <linux/profile.h>
22
11
#include <linux/delay.h>
23
12
#include <linux/cpu.h>
24
13
 
25
 
#include <asm/ptrace.h>
26
 
#include <asm/atomic.h>
27
 
#include <asm/irq_regs.h>
28
 
 
29
 
#include <asm/irq.h>
30
 
#include <asm/page.h>
31
 
#include <asm/pgalloc.h>
32
 
#include <asm/pgtable.h>
33
 
#include <asm/oplib.h>
34
14
#include <asm/sbi.h>
 
15
#include <asm/mmu.h>
35
16
#include <asm/tlbflush.h>
36
17
#include <asm/cacheflush.h>
37
 
#include <asm/cpudata.h>
38
18
 
 
19
#include "kernel.h"
39
20
#include "irq.h"
 
21
 
40
22
#define IRQ_CROSS_CALL          15
41
23
 
42
 
extern ctxd_t *srmmu_ctx_table_phys;
43
 
 
44
 
static volatile int smp_processors_ready = 0;
 
24
static volatile int smp_processors_ready;
45
25
static int smp_highest_cpu;
46
 
extern volatile unsigned long cpu_callin_map[NR_CPUS];
47
 
extern cpuinfo_sparc cpu_data[NR_CPUS];
48
 
extern unsigned char boot_cpu_id;
49
 
extern volatile int smp_process_available;
50
 
 
51
 
extern cpumask_t smp_commenced_mask;
52
 
 
53
 
extern int __smp4d_processor_id(void);
54
 
 
55
 
/* #define SMP_DEBUG */
56
 
 
57
 
#ifdef SMP_DEBUG
58
 
#define SMP_PRINTK(x)   printk x
59
 
#else
60
 
#define SMP_PRINTK(x)
61
 
#endif
62
26
 
63
27
static inline unsigned long sun4d_swap(volatile unsigned long *ptr, unsigned long val)
64
28
{
69
33
}
70
34
 
71
35
static void smp_setup_percpu_timer(void);
72
 
extern void cpu_probe(void);
73
 
extern void sun4d_distribute_irqs(void);
74
36
 
75
37
static unsigned char cpu_leds[32];
76
38
 
86
48
void __cpuinit smp4d_callin(void)
87
49
{
88
50
        int cpuid = hard_smp4d_processor_id();
89
 
        extern spinlock_t sun4d_imsk_lock;
90
51
        unsigned long flags;
91
 
        
 
52
 
92
53
        /* Show we are alive */
93
54
        cpu_leds[cpuid] = 0x6;
94
55
        show_leds(cpuid);
118
79
        sun4d_swap((unsigned long *)&cpu_callin_map[cpuid], 1);
119
80
        local_flush_cache_all();
120
81
        local_flush_tlb_all();
121
 
        
 
82
 
122
83
        cpu_probe();
123
84
 
124
 
        while((unsigned long)current_set[cpuid] < PAGE_OFFSET)
125
 
                barrier();
126
 
                
127
 
        while(current_set[cpuid]->cpu != cpuid)
128
 
                barrier();
129
 
                
 
85
        while ((unsigned long)current_set[cpuid] < PAGE_OFFSET)
 
86
                barrier();
 
87
 
 
88
        while (current_set[cpuid]->cpu != cpuid)
 
89
                barrier();
 
90
 
130
91
        /* Fix idle thread fields. */
131
92
        __asm__ __volatile__("ld [%0], %%g6\n\t"
132
93
                             : : "r" (&current_set[cpuid])
134
95
 
135
96
        cpu_leds[cpuid] = 0x9;
136
97
        show_leds(cpuid);
137
 
        
 
98
 
138
99
        /* Attach to the address space of init_task. */
139
100
        atomic_inc(&init_mm.mm_count);
140
101
        current->active_mm = &init_mm;
141
102
 
142
103
        local_flush_cache_all();
143
104
        local_flush_tlb_all();
144
 
        
 
105
 
145
106
        local_irq_enable();     /* We don't allow PIL 14 yet */
146
 
        
 
107
 
147
108
        while (!cpu_isset(cpuid, smp_commenced_mask))
148
109
                barrier();
149
110
 
154
115
 
155
116
}
156
117
 
157
 
extern void init_IRQ(void);
158
 
extern void cpu_panic(void);
159
 
 
160
118
/*
161
119
 *      Cycle through the processors asking the PROM to start each one.
162
120
 */
163
 
 
164
 
extern struct linux_prom_registers smp_penguin_ctable;
165
 
 
166
121
void __init smp4d_boot_cpus(void)
167
122
{
168
123
        if (boot_cpu_id)
173
128
 
174
129
int __cpuinit smp4d_boot_one_cpu(int i)
175
130
{
176
 
                        extern unsigned long sun4d_cpu_startup;
177
 
                        unsigned long *entry = &sun4d_cpu_startup;
178
 
                        struct task_struct *p;
179
 
                        int timeout;
180
 
                        int cpu_node;
181
 
 
182
 
                        cpu_find_by_instance(i, &cpu_node,NULL);
183
 
                        /* Cook up an idler for this guy. */
184
 
                        p = fork_idle(i);
185
 
                        current_set[i] = task_thread_info(p);
186
 
 
187
 
                        /*
188
 
                         * Initialize the contexts table
189
 
                         * Since the call to prom_startcpu() trashes the structure,
190
 
                         * we need to re-initialize it for each cpu
191
 
                         */
192
 
                        smp_penguin_ctable.which_io = 0;
193
 
                        smp_penguin_ctable.phys_addr = (unsigned int) srmmu_ctx_table_phys;
194
 
                        smp_penguin_ctable.reg_size = 0;
195
 
 
196
 
                        /* whirrr, whirrr, whirrrrrrrrr... */
197
 
                        SMP_PRINTK(("Starting CPU %d at %p\n", i, entry));
198
 
                        local_flush_cache_all();
199
 
                        prom_startcpu(cpu_node,
200
 
                                      &smp_penguin_ctable, 0, (char *)entry);
201
 
                                      
202
 
                        SMP_PRINTK(("prom_startcpu returned :)\n"));
203
 
 
204
 
                        /* wheee... it's going... */
205
 
                        for(timeout = 0; timeout < 10000; timeout++) {
206
 
                                if(cpu_callin_map[i])
207
 
                                        break;
208
 
                                udelay(200);
209
 
                        }
210
 
                        
 
131
        unsigned long *entry = &sun4d_cpu_startup;
 
132
        struct task_struct *p;
 
133
        int timeout;
 
134
        int cpu_node;
 
135
 
 
136
        cpu_find_by_instance(i, &cpu_node, NULL);
 
137
        /* Cook up an idler for this guy. */
 
138
        p = fork_idle(i);
 
139
        current_set[i] = task_thread_info(p);
 
140
 
 
141
        /*
 
142
         * Initialize the contexts table
 
143
         * Since the call to prom_startcpu() trashes the structure,
 
144
         * we need to re-initialize it for each cpu
 
145
         */
 
146
        smp_penguin_ctable.which_io = 0;
 
147
        smp_penguin_ctable.phys_addr = (unsigned int) srmmu_ctx_table_phys;
 
148
        smp_penguin_ctable.reg_size = 0;
 
149
 
 
150
        /* whirrr, whirrr, whirrrrrrrrr... */
 
151
        printk(KERN_INFO "Starting CPU %d at %p\n", i, entry);
 
152
        local_flush_cache_all();
 
153
        prom_startcpu(cpu_node,
 
154
                      &smp_penguin_ctable, 0, (char *)entry);
 
155
 
 
156
        printk(KERN_INFO "prom_startcpu returned :)\n");
 
157
 
 
158
        /* wheee... it's going... */
 
159
        for (timeout = 0; timeout < 10000; timeout++) {
 
160
                if (cpu_callin_map[i])
 
161
                        break;
 
162
                udelay(200);
 
163
        }
 
164
 
211
165
        if (!(cpu_callin_map[i])) {
212
 
                printk("Processor %d is stuck.\n", i);
 
166
                printk(KERN_ERR "Processor %d is stuck.\n", i);
213
167
                return -ENODEV;
214
168
 
215
169
        }
255
209
                             unsigned long arg2, unsigned long arg3,
256
210
                             unsigned long arg4)
257
211
{
258
 
        if(smp_processors_ready) {
 
212
        if (smp_processors_ready) {
259
213
                register int high = smp_highest_cpu;
260
214
                unsigned long flags;
261
215
 
262
216
                spin_lock_irqsave(&cross_call_lock, flags);
263
217
 
264
218
                {
265
 
                        /* If you make changes here, make sure gcc generates proper code... */
 
219
                        /*
 
220
                         * If you make changes here, make sure
 
221
                         * gcc generates proper code...
 
222
                         */
266
223
                        register smpfunc_t f asm("i0") = func;
267
224
                        register unsigned long a1 asm("i1") = arg1;
268
225
                        register unsigned long a2 asm("i2") = arg2;
284
241
 
285
242
                        cpu_clear(smp_processor_id(), mask);
286
243
                        cpus_and(mask, cpu_online_map, mask);
287
 
                        for(i = 0; i <= high; i++) {
 
244
                        for (i = 0; i <= high; i++) {
288
245
                                if (cpu_isset(i, mask)) {
289
246
                                        ccall_info.processors_in[i] = 0;
290
247
                                        ccall_info.processors_out[i] = 0;
300
257
                        do {
301
258
                                if (!cpu_isset(i, mask))
302
259
                                        continue;
303
 
                                while(!ccall_info.processors_in[i])
 
260
                                while (!ccall_info.processors_in[i])
304
261
                                        barrier();
305
 
                        } while(++i <= high);
 
262
                        } while (++i <= high);
306
263
 
307
264
                        i = 0;
308
265
                        do {
309
266
                                if (!cpu_isset(i, mask))
310
267
                                        continue;
311
 
                                while(!ccall_info.processors_out[i])
 
268
                                while (!ccall_info.processors_out[i])
312
269
                                        barrier();
313
 
                        } while(++i <= high);
 
270
                        } while (++i <= high);
314
271
                }
315
272
 
316
273
                spin_unlock_irqrestore(&cross_call_lock, flags);
336
293
        static char led_mask[] = { 0xe, 0xd, 0xb, 0x7, 0xb, 0xd };
337
294
 
338
295
        old_regs = set_irq_regs(regs);
339
 
        bw_get_prof_limit(cpu); 
 
296
        bw_get_prof_limit(cpu);
340
297
        bw_clear_intr_mask(0, 1);       /* INTR_TABLE[0] & 1 is Profile IRQ */
341
298
 
342
299
        cpu_tick[cpu]++;
349
306
 
350
307
        profile_tick(CPU_PROFILING);
351
308
 
352
 
        if(!--prof_counter(cpu)) {
 
309
        if (!--prof_counter(cpu)) {
353
310
                int user = user_mode(regs);
354
311
 
355
312
                irq_enter();
361
318
        set_irq_regs(old_regs);
362
319
}
363
320
 
364
 
extern unsigned int lvl14_resolution;
365
 
 
366
321
static void __cpuinit smp_setup_percpu_timer(void)
367
322
{
368
323
        int cpu = hard_smp4d_processor_id();
374
329
void __init smp4d_blackbox_id(unsigned *addr)
375
330
{
376
331
        int rd = *addr & 0x3e000000;
377
 
        
 
332
 
378
333
        addr[0] = 0xc0800800 | rd;              /* lda [%g0] ASI_M_VIKING_TMP1, reg */
379
 
        addr[1] = 0x01000000;                   /* nop */
380
 
        addr[2] = 0x01000000;                   /* nop */
 
334
        addr[1] = 0x01000000;                   /* nop */
 
335
        addr[2] = 0x01000000;                   /* nop */
381
336
}
382
337
 
383
338
void __init smp4d_blackbox_current(unsigned *addr)
384
339
{
385
340
        int rd = *addr & 0x3e000000;
386
 
        
 
341
 
387
342
        addr[0] = 0xc0800800 | rd;              /* lda [%g0] ASI_M_VIKING_TMP1, reg */
388
343
        addr[2] = 0x81282002 | rd | (rd >> 11); /* sll reg, 2, reg */
389
344
        addr[4] = 0x01000000;                   /* nop */
392
347
void __init sun4d_init_smp(void)
393
348
{
394
349
        int i;
395
 
        extern unsigned int t_nmi[], linux_trap_ipi15_sun4d[], linux_trap_ipi15_sun4m[];
396
350
 
397
351
        /* Patch ipi15 trap table */
398
352
        t_nmi[1] = t_nmi[1] + (linux_trap_ipi15_sun4d - linux_trap_ipi15_sun4m);
399
 
        
 
353
 
400
354
        /* And set btfixup... */
401
355
        BTFIXUPSET_BLACKBOX(hard_smp_processor_id, smp4d_blackbox_id);
402
356
        BTFIXUPSET_BLACKBOX(load_current, smp4d_blackbox_current);
403
357
        BTFIXUPSET_CALL(smp_cross_call, smp4d_cross_call, BTFIXUPCALL_NORM);
404
358
        BTFIXUPSET_CALL(__hard_smp_processor_id, __smp4d_processor_id, BTFIXUPCALL_NORM);
405
 
        
 
359
 
406
360
        for (i = 0; i < NR_CPUS; i++) {
407
361
                ccall_info.processors_in[i] = 1;
408
362
                ccall_info.processors_out[i] = 1;