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
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
|
/*
* Maple (970 eval board) setup code
*
* (c) Copyright 2004 Benjamin Herrenschmidt (benh@kernel.crashing.org),
* IBM Corp.
*
* 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.
*
*/
#define DEBUG
#include <linux/config.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/stddef.h>
#include <linux/unistd.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/user.h>
#include <linux/a.out.h>
#include <linux/tty.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/major.h>
#include <linux/initrd.h>
#include <linux/vt_kern.h>
#include <linux/console.h>
#include <linux/ide.h>
#include <linux/pci.h>
#include <linux/adb.h>
#include <linux/cuda.h>
#include <linux/pmu.h>
#include <linux/irq.h>
#include <linux/seq_file.h>
#include <linux/root_dev.h>
#include <linux/serial.h>
#include <linux/smp.h>
#include <asm/processor.h>
#include <asm/sections.h>
#include <asm/prom.h>
#include <asm/system.h>
#include <asm/pgtable.h>
#include <asm/bitops.h>
#include <asm/io.h>
#include <asm/kexec.h>
#include <asm/pci-bridge.h>
#include <asm/iommu.h>
#include <asm/machdep.h>
#include <asm/dma.h>
#include <asm/cputable.h>
#include <asm/time.h>
#include <asm/of_device.h>
#include <asm/lmb.h>
#include <asm/mpic.h>
#include <asm/udbg.h>
#include "maple.h"
#ifdef DEBUG
#define DBG(fmt...) udbg_printf(fmt)
#else
#define DBG(fmt...)
#endif
static unsigned long maple_find_nvram_base(void)
{
struct device_node *rtcs;
unsigned long result = 0;
/* find NVRAM device */
rtcs = of_find_compatible_node(NULL, "nvram", "AMD8111");
if (rtcs) {
struct resource r;
if (of_address_to_resource(rtcs, 0, &r)) {
printk(KERN_EMERG "Maple: Unable to translate NVRAM"
" address\n");
goto bail;
}
if (!(r.flags & IORESOURCE_IO)) {
printk(KERN_EMERG "Maple: NVRAM address isn't PIO!\n");
goto bail;
}
result = r.start;
} else
printk(KERN_EMERG "Maple: Unable to find NVRAM\n");
bail:
of_node_put(rtcs);
return result;
}
static void maple_restart(char *cmd)
{
unsigned int maple_nvram_base;
unsigned int maple_nvram_offset;
unsigned int maple_nvram_command;
struct device_node *sp;
maple_nvram_base = maple_find_nvram_base();
if (maple_nvram_base == 0)
goto fail;
/* find service processor device */
sp = of_find_node_by_name(NULL, "service-processor");
if (!sp) {
printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
goto fail;
}
maple_nvram_offset = *(unsigned int*) get_property(sp,
"restart-addr", NULL);
maple_nvram_command = *(unsigned int*) get_property(sp,
"restart-value", NULL);
of_node_put(sp);
/* send command */
outb_p(maple_nvram_command, maple_nvram_base + maple_nvram_offset);
for (;;) ;
fail:
printk(KERN_EMERG "Maple: Manual Restart Required\n");
}
static void maple_power_off(void)
{
unsigned int maple_nvram_base;
unsigned int maple_nvram_offset;
unsigned int maple_nvram_command;
struct device_node *sp;
maple_nvram_base = maple_find_nvram_base();
if (maple_nvram_base == 0)
goto fail;
/* find service processor device */
sp = of_find_node_by_name(NULL, "service-processor");
if (!sp) {
printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
goto fail;
}
maple_nvram_offset = *(unsigned int*) get_property(sp,
"power-off-addr", NULL);
maple_nvram_command = *(unsigned int*) get_property(sp,
"power-off-value", NULL);
of_node_put(sp);
/* send command */
outb_p(maple_nvram_command, maple_nvram_base + maple_nvram_offset);
for (;;) ;
fail:
printk(KERN_EMERG "Maple: Manual Power-Down Required\n");
}
static void maple_halt(void)
{
maple_power_off();
}
#ifdef CONFIG_SMP
struct smp_ops_t maple_smp_ops = {
.probe = smp_mpic_probe,
.message_pass = smp_mpic_message_pass,
.kick_cpu = smp_generic_kick_cpu,
.setup_cpu = smp_mpic_setup_cpu,
.give_timebase = smp_generic_give_timebase,
.take_timebase = smp_generic_take_timebase,
};
#endif /* CONFIG_SMP */
void __init maple_setup_arch(void)
{
/* init to some ~sane value until calibrate_delay() runs */
loops_per_jiffy = 50000000;
/* Setup SMP callback */
#ifdef CONFIG_SMP
smp_ops = &maple_smp_ops;
#endif
/* Lookup PCI hosts */
maple_pci_init();
#ifdef CONFIG_DUMMY_CONSOLE
conswitchp = &dummy_con;
#endif
printk(KERN_INFO "Using native/NAP idle loop\n");
}
/*
* Early initialization.
*/
static void __init maple_init_early(void)
{
DBG(" -> maple_init_early\n");
/* Initialize hash table, from now on, we can take hash faults
* and call ioremap
*/
hpte_init_native();
/* Setup interrupt mapping options */
ppc64_interrupt_controller = IC_OPEN_PIC;
iommu_init_early_dart();
DBG(" <- maple_init_early\n");
}
static __init void maple_init_IRQ(void)
{
struct device_node *root;
unsigned int *opprop;
unsigned long opic_addr;
struct mpic *mpic;
unsigned char senses[128];
int n;
DBG(" -> maple_init_IRQ\n");
/* XXX: Non standard, replace that with a proper openpic/mpic node
* in the device-tree. Find the Open PIC if present */
root = of_find_node_by_path("/");
opprop = (unsigned int *) get_property(root,
"platform-open-pic", NULL);
if (opprop == 0)
panic("OpenPIC not found !\n");
n = prom_n_addr_cells(root);
for (opic_addr = 0; n > 0; --n)
opic_addr = (opic_addr << 32) + *opprop++;
of_node_put(root);
/* Obtain sense values from device-tree */
prom_get_irq_senses(senses, 0, 128);
mpic = mpic_alloc(opic_addr,
MPIC_PRIMARY | MPIC_BIG_ENDIAN |
MPIC_BROKEN_U3 | MPIC_WANTS_RESET,
0, 0, 128, 128, senses, 128, "U3-MPIC");
BUG_ON(mpic == NULL);
mpic_init(mpic);
DBG(" <- maple_init_IRQ\n");
}
static void __init maple_progress(char *s, unsigned short hex)
{
printk("*** %04x : %s\n", hex, s ? s : "");
}
/*
* Called very early, MMU is off, device-tree isn't unflattened
*/
static int __init maple_probe(void)
{
unsigned long root = of_get_flat_dt_root();
if (!of_flat_dt_is_compatible(root, "Momentum,Maple"))
return 0;
/*
* On U3, the DART (iommu) must be allocated now since it
* has an impact on htab_initialize (due to the large page it
* occupies having to be broken up so the DART itself is not
* part of the cacheable linar mapping
*/
alloc_dart_table();
return 1;
}
define_machine(maple_md) {
.name = "Maple",
.probe = maple_probe,
.setup_arch = maple_setup_arch,
.init_early = maple_init_early,
.init_IRQ = maple_init_IRQ,
.get_irq = mpic_get_irq,
.pcibios_fixup = maple_pcibios_fixup,
.pci_get_legacy_ide_irq = maple_pci_get_legacy_ide_irq,
.restart = maple_restart,
.power_off = maple_power_off,
.halt = maple_halt,
.get_boot_time = maple_get_boot_time,
.set_rtc_time = maple_set_rtc_time,
.get_rtc_time = maple_get_rtc_time,
.calibrate_decr = generic_calibrate_decr,
.progress = maple_progress,
.power_save = power4_idle,
#ifdef CONFIG_KEXEC
.machine_kexec = default_machine_kexec,
.machine_kexec_prepare = default_machine_kexec_prepare,
.machine_crash_shutdown = default_machine_crash_shutdown,
#endif
};
|
