Merge branch 'mv-merge'
[linux-2.6] / arch / powerpc / platforms / maple / setup.c
1 /*
2  *  Maple (970 eval board) setup code
3  *
4  *  (c) Copyright 2004 Benjamin Herrenschmidt (benh@kernel.crashing.org),
5  *                     IBM Corp. 
6  *
7  *  This program is free software; you can redistribute it and/or
8  *  modify it under the terms of the GNU General Public License
9  *  as published by the Free Software Foundation; either version
10  *  2 of the License, or (at your option) any later version.
11  *
12  */
13
14 #define DEBUG
15
16 #include <linux/config.h>
17 #include <linux/init.h>
18 #include <linux/errno.h>
19 #include <linux/sched.h>
20 #include <linux/kernel.h>
21 #include <linux/mm.h>
22 #include <linux/stddef.h>
23 #include <linux/unistd.h>
24 #include <linux/ptrace.h>
25 #include <linux/slab.h>
26 #include <linux/user.h>
27 #include <linux/a.out.h>
28 #include <linux/tty.h>
29 #include <linux/string.h>
30 #include <linux/delay.h>
31 #include <linux/ioport.h>
32 #include <linux/major.h>
33 #include <linux/initrd.h>
34 #include <linux/vt_kern.h>
35 #include <linux/console.h>
36 #include <linux/ide.h>
37 #include <linux/pci.h>
38 #include <linux/adb.h>
39 #include <linux/cuda.h>
40 #include <linux/pmu.h>
41 #include <linux/irq.h>
42 #include <linux/seq_file.h>
43 #include <linux/root_dev.h>
44 #include <linux/serial.h>
45 #include <linux/smp.h>
46
47 #include <asm/processor.h>
48 #include <asm/sections.h>
49 #include <asm/prom.h>
50 #include <asm/system.h>
51 #include <asm/pgtable.h>
52 #include <asm/bitops.h>
53 #include <asm/io.h>
54 #include <asm/kexec.h>
55 #include <asm/pci-bridge.h>
56 #include <asm/iommu.h>
57 #include <asm/machdep.h>
58 #include <asm/dma.h>
59 #include <asm/cputable.h>
60 #include <asm/time.h>
61 #include <asm/of_device.h>
62 #include <asm/lmb.h>
63 #include <asm/mpic.h>
64 #include <asm/udbg.h>
65
66 #include "maple.h"
67
68 #ifdef DEBUG
69 #define DBG(fmt...) udbg_printf(fmt)
70 #else
71 #define DBG(fmt...)
72 #endif
73
74 static unsigned long maple_find_nvram_base(void)
75 {
76         struct device_node *rtcs;
77         unsigned long result = 0;
78
79         /* find NVRAM device */
80         rtcs = of_find_compatible_node(NULL, "nvram", "AMD8111");
81         if (rtcs) {
82                 struct resource r;
83                 if (of_address_to_resource(rtcs, 0, &r)) {
84                         printk(KERN_EMERG "Maple: Unable to translate NVRAM"
85                                " address\n");
86                         goto bail;
87                 }
88                 if (!(r.flags & IORESOURCE_IO)) {
89                         printk(KERN_EMERG "Maple: NVRAM address isn't PIO!\n");
90                         goto bail;
91                 }
92                 result = r.start;
93         } else
94                 printk(KERN_EMERG "Maple: Unable to find NVRAM\n");
95  bail:
96         of_node_put(rtcs);
97         return result;
98 }
99
100 static void maple_restart(char *cmd)
101 {
102         unsigned int maple_nvram_base;
103         unsigned int maple_nvram_offset;
104         unsigned int maple_nvram_command;
105         struct device_node *sp;
106
107         maple_nvram_base = maple_find_nvram_base();
108         if (maple_nvram_base == 0)
109                 goto fail;
110
111         /* find service processor device */
112         sp = of_find_node_by_name(NULL, "service-processor");
113         if (!sp) {
114                 printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
115                 goto fail;
116         }
117         maple_nvram_offset = *(unsigned int*) get_property(sp,
118                         "restart-addr", NULL);
119         maple_nvram_command = *(unsigned int*) get_property(sp,
120                         "restart-value", NULL);
121         of_node_put(sp);
122
123         /* send command */
124         outb_p(maple_nvram_command, maple_nvram_base + maple_nvram_offset);
125         for (;;) ;
126  fail:
127         printk(KERN_EMERG "Maple: Manual Restart Required\n");
128 }
129
130 static void maple_power_off(void)
131 {
132         unsigned int maple_nvram_base;
133         unsigned int maple_nvram_offset;
134         unsigned int maple_nvram_command;
135         struct device_node *sp;
136
137         maple_nvram_base = maple_find_nvram_base();
138         if (maple_nvram_base == 0)
139                 goto fail;
140
141         /* find service processor device */
142         sp = of_find_node_by_name(NULL, "service-processor");
143         if (!sp) {
144                 printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
145                 goto fail;
146         }
147         maple_nvram_offset = *(unsigned int*) get_property(sp,
148                         "power-off-addr", NULL);
149         maple_nvram_command = *(unsigned int*) get_property(sp,
150                         "power-off-value", NULL);
151         of_node_put(sp);
152
153         /* send command */
154         outb_p(maple_nvram_command, maple_nvram_base + maple_nvram_offset);
155         for (;;) ;
156  fail:
157         printk(KERN_EMERG "Maple: Manual Power-Down Required\n");
158 }
159
160 static void maple_halt(void)
161 {
162         maple_power_off();
163 }
164
165 #ifdef CONFIG_SMP
166 struct smp_ops_t maple_smp_ops = {
167         .probe          = smp_mpic_probe,
168         .message_pass   = smp_mpic_message_pass,
169         .kick_cpu       = smp_generic_kick_cpu,
170         .setup_cpu      = smp_mpic_setup_cpu,
171         .give_timebase  = smp_generic_give_timebase,
172         .take_timebase  = smp_generic_take_timebase,
173 };
174 #endif /* CONFIG_SMP */
175
176 void __init maple_setup_arch(void)
177 {
178         /* init to some ~sane value until calibrate_delay() runs */
179         loops_per_jiffy = 50000000;
180
181         /* Setup SMP callback */
182 #ifdef CONFIG_SMP
183         smp_ops = &maple_smp_ops;
184 #endif
185         /* Lookup PCI hosts */
186         maple_pci_init();
187
188 #ifdef CONFIG_DUMMY_CONSOLE
189         conswitchp = &dummy_con;
190 #endif
191
192         printk(KERN_INFO "Using native/NAP idle loop\n");
193 }
194
195 /* 
196  * Early initialization.
197  */
198 static void __init maple_init_early(void)
199 {
200         DBG(" -> maple_init_early\n");
201
202         /* Initialize hash table, from now on, we can take hash faults
203          * and call ioremap
204          */
205         hpte_init_native();
206
207         /* Setup interrupt mapping options */
208         ppc64_interrupt_controller = IC_OPEN_PIC;
209
210         iommu_init_early_dart();
211
212         DBG(" <- maple_init_early\n");
213 }
214
215
216 static __init void maple_init_IRQ(void)
217 {
218         struct device_node *root;
219         unsigned int *opprop;
220         unsigned long opic_addr;
221         struct mpic *mpic;
222         unsigned char senses[128];
223         int n;
224
225         DBG(" -> maple_init_IRQ\n");
226
227         /* XXX: Non standard, replace that with a proper openpic/mpic node
228          * in the device-tree. Find the Open PIC if present */
229         root = of_find_node_by_path("/");
230         opprop = (unsigned int *) get_property(root,
231                                 "platform-open-pic", NULL);
232         if (opprop == 0)
233                 panic("OpenPIC not found !\n");
234
235         n = prom_n_addr_cells(root);
236         for (opic_addr = 0; n > 0; --n)
237                 opic_addr = (opic_addr << 32) + *opprop++;
238         of_node_put(root);
239
240         /* Obtain sense values from device-tree */
241         prom_get_irq_senses(senses, 0, 128);
242
243         mpic = mpic_alloc(opic_addr,
244                           MPIC_PRIMARY | MPIC_BIG_ENDIAN |
245                           MPIC_BROKEN_U3 | MPIC_WANTS_RESET,
246                           0, 0, 128, 128, senses, 128, "U3-MPIC");
247         BUG_ON(mpic == NULL);
248         mpic_init(mpic);
249
250         DBG(" <- maple_init_IRQ\n");
251 }
252
253 static void __init maple_progress(char *s, unsigned short hex)
254 {
255         printk("*** %04x : %s\n", hex, s ? s : "");
256 }
257
258
259 /*
260  * Called very early, MMU is off, device-tree isn't unflattened
261  */
262 static int __init maple_probe(void)
263 {
264         unsigned long root = of_get_flat_dt_root();
265         if (!of_flat_dt_is_compatible(root, "Momentum,Maple"))
266                 return 0;
267         /*
268          * On U3, the DART (iommu) must be allocated now since it
269          * has an impact on htab_initialize (due to the large page it
270          * occupies having to be broken up so the DART itself is not
271          * part of the cacheable linar mapping
272          */
273         alloc_dart_table();
274
275         return 1;
276 }
277
278 define_machine(maple_md) {
279         .name                   = "Maple",
280         .probe                  = maple_probe,
281         .setup_arch             = maple_setup_arch,
282         .init_early             = maple_init_early,
283         .init_IRQ               = maple_init_IRQ,
284         .get_irq                = mpic_get_irq,
285         .pcibios_fixup          = maple_pcibios_fixup,
286         .pci_get_legacy_ide_irq = maple_pci_get_legacy_ide_irq,
287         .restart                = maple_restart,
288         .power_off              = maple_power_off,
289         .halt                   = maple_halt,
290         .get_boot_time          = maple_get_boot_time,
291         .set_rtc_time           = maple_set_rtc_time,
292         .get_rtc_time           = maple_get_rtc_time,
293         .calibrate_decr         = generic_calibrate_decr,
294         .progress               = maple_progress,
295         .power_save             = power4_idle,
296 #ifdef CONFIG_KEXEC
297         .machine_kexec          = default_machine_kexec,
298         .machine_kexec_prepare  = default_machine_kexec_prepare,
299         .machine_crash_shutdown = default_machine_crash_shutdown,
300 #endif
301 };