2 * Maple (970 eval board) setup code
4 * (c) Copyright 2004 Benjamin Herrenschmidt (benh@kernel.crashing.org),
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.
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>
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>
47 #include <asm/processor.h>
48 #include <asm/sections.h>
50 #include <asm/system.h>
51 #include <asm/pgtable.h>
52 #include <asm/bitops.h>
54 #include <asm/pci-bridge.h>
55 #include <asm/iommu.h>
56 #include <asm/machdep.h>
58 #include <asm/cputable.h>
60 #include <asm/of_device.h>
68 #define DBG(fmt...) udbg_printf(fmt)
73 extern void generic_find_legacy_serial_ports(u64
*physport
,
74 unsigned int *default_speed
);
76 static void maple_restart(char *cmd
)
78 unsigned int maple_nvram_base
;
79 unsigned int maple_nvram_offset
;
80 unsigned int maple_nvram_command
;
81 struct device_node
*rtcs
;
83 /* find NVRAM device */
84 rtcs
= find_compatible_devices("nvram", "AMD8111");
85 if (rtcs
&& rtcs
->addrs
) {
86 maple_nvram_base
= rtcs
->addrs
[0].address
;
88 printk(KERN_EMERG
"Maple: Unable to find NVRAM\n");
89 printk(KERN_EMERG
"Maple: Manual Restart Required\n");
93 /* find service processor device */
94 rtcs
= find_devices("service-processor");
96 printk(KERN_EMERG
"Maple: Unable to find Service Processor\n");
97 printk(KERN_EMERG
"Maple: Manual Restart Required\n");
100 maple_nvram_offset
= *(unsigned int*) get_property(rtcs
,
101 "restart-addr", NULL
);
102 maple_nvram_command
= *(unsigned int*) get_property(rtcs
,
103 "restart-value", NULL
);
106 outb_p(maple_nvram_command
, maple_nvram_base
+ maple_nvram_offset
);
110 static void maple_power_off(void)
112 unsigned int maple_nvram_base
;
113 unsigned int maple_nvram_offset
;
114 unsigned int maple_nvram_command
;
115 struct device_node
*rtcs
;
117 /* find NVRAM device */
118 rtcs
= find_compatible_devices("nvram", "AMD8111");
119 if (rtcs
&& rtcs
->addrs
) {
120 maple_nvram_base
= rtcs
->addrs
[0].address
;
122 printk(KERN_EMERG
"Maple: Unable to find NVRAM\n");
123 printk(KERN_EMERG
"Maple: Manual Power-Down Required\n");
127 /* find service processor device */
128 rtcs
= find_devices("service-processor");
130 printk(KERN_EMERG
"Maple: Unable to find Service Processor\n");
131 printk(KERN_EMERG
"Maple: Manual Power-Down Required\n");
134 maple_nvram_offset
= *(unsigned int*) get_property(rtcs
,
135 "power-off-addr", NULL
);
136 maple_nvram_command
= *(unsigned int*) get_property(rtcs
,
137 "power-off-value", NULL
);
140 outb_p(maple_nvram_command
, maple_nvram_base
+ maple_nvram_offset
);
144 static void maple_halt(void)
150 struct smp_ops_t maple_smp_ops
= {
151 .probe
= smp_mpic_probe
,
152 .message_pass
= smp_mpic_message_pass
,
153 .kick_cpu
= smp_generic_kick_cpu
,
154 .setup_cpu
= smp_mpic_setup_cpu
,
155 .give_timebase
= smp_generic_give_timebase
,
156 .take_timebase
= smp_generic_take_timebase
,
158 #endif /* CONFIG_SMP */
160 void __init
maple_setup_arch(void)
162 /* init to some ~sane value until calibrate_delay() runs */
163 loops_per_jiffy
= 50000000;
165 /* Setup SMP callback */
167 smp_ops
= &maple_smp_ops
;
169 /* Lookup PCI hosts */
172 #ifdef CONFIG_DUMMY_CONSOLE
173 conswitchp
= &dummy_con
;
176 printk(KERN_INFO
"Using native/NAP idle loop\n");
180 * Early initialization.
182 static void __init
maple_init_early(void)
184 unsigned int default_speed
;
187 DBG(" -> maple_init_early\n");
189 /* Initialize hash table, from now on, we can take hash faults
194 /* Find the serial port */
195 generic_find_legacy_serial_ports(&physport
, &default_speed
);
197 DBG("phys port addr: %lx\n", (long)physport
);
201 /* Map the uart for udbg. */
202 comport
= (void *)ioremap(physport
, 16);
203 udbg_init_uart(comport
, default_speed
);
205 DBG("Hello World !\n");
208 /* Setup interrupt mapping options */
209 ppc64_interrupt_controller
= IC_OPEN_PIC
;
211 iommu_init_early_u3();
213 DBG(" <- maple_init_early\n");
217 static __init
void maple_init_IRQ(void)
219 struct device_node
*root
;
220 unsigned int *opprop
;
221 unsigned long opic_addr
;
223 unsigned char senses
[128];
226 DBG(" -> maple_init_IRQ\n");
228 /* XXX: Non standard, replace that with a proper openpic/mpic node
229 * in the device-tree. Find the Open PIC if present */
230 root
= of_find_node_by_path("/");
231 opprop
= (unsigned int *) get_property(root
,
232 "platform-open-pic", NULL
);
234 panic("OpenPIC not found !\n");
236 n
= prom_n_addr_cells(root
);
237 for (opic_addr
= 0; n
> 0; --n
)
238 opic_addr
= (opic_addr
<< 32) + *opprop
++;
241 /* Obtain sense values from device-tree */
242 prom_get_irq_senses(senses
, 0, 128);
244 mpic
= mpic_alloc(opic_addr
,
245 MPIC_PRIMARY
| MPIC_BIG_ENDIAN
|
246 MPIC_BROKEN_U3
| MPIC_WANTS_RESET
,
247 0, 0, 128, 128, senses
, 128, "U3-MPIC");
248 BUG_ON(mpic
== NULL
);
251 DBG(" <- maple_init_IRQ\n");
254 static void __init
maple_progress(char *s
, unsigned short hex
)
256 printk("*** %04x : %s\n", hex
, s
? s
: "");
261 * Called very early, MMU is off, device-tree isn't unflattened
263 static int __init
maple_probe(int platform
)
265 if (platform
!= PLATFORM_MAPLE
)
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
273 alloc_u3_dart_table();
278 struct machdep_calls __initdata maple_md
= {
279 .probe
= maple_probe
,
280 .setup_arch
= maple_setup_arch
,
281 .init_early
= maple_init_early
,
282 .init_IRQ
= maple_init_IRQ
,
283 .get_irq
= mpic_get_irq
,
284 .pcibios_fixup
= maple_pcibios_fixup
,
285 .pci_get_legacy_ide_irq
= maple_pci_get_legacy_ide_irq
,
286 .restart
= maple_restart
,
287 .power_off
= maple_power_off
,
289 .get_boot_time
= maple_get_boot_time
,
290 .set_rtc_time
= maple_set_rtc_time
,
291 .get_rtc_time
= maple_get_rtc_time
,
292 .calibrate_decr
= generic_calibrate_decr
,
293 .progress
= maple_progress
,
294 .idle_loop
= native_idle
,