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/kexec.h>
55 #include <asm/pci-bridge.h>
56 #include <asm/iommu.h>
57 #include <asm/machdep.h>
59 #include <asm/cputable.h>
61 #include <asm/of_device.h>
69 #define DBG(fmt...) udbg_printf(fmt)
74 static unsigned long maple_find_nvram_base(void)
76 struct device_node *rtcs;
77 unsigned long result = 0;
79 /* find NVRAM device */
80 rtcs = of_find_compatible_node(NULL, "nvram", "AMD8111");
83 if (of_address_to_resource(rtcs, 0, &r)) {
84 printk(KERN_EMERG "Maple: Unable to translate NVRAM"
88 if (!(r.flags & IORESOURCE_IO)) {
89 printk(KERN_EMERG "Maple: NVRAM address isn't PIO!\n");
94 printk(KERN_EMERG "Maple: Unable to find NVRAM\n");
100 static void maple_restart(char *cmd)
102 unsigned int maple_nvram_base;
103 unsigned int maple_nvram_offset;
104 unsigned int maple_nvram_command;
105 struct device_node *sp;
107 maple_nvram_base = maple_find_nvram_base();
108 if (maple_nvram_base == 0)
111 /* find service processor device */
112 sp = of_find_node_by_name(NULL, "service-processor");
114 printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
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);
124 outb_p(maple_nvram_command, maple_nvram_base + maple_nvram_offset);
127 printk(KERN_EMERG "Maple: Manual Restart Required\n");
130 static void maple_power_off(void)
132 unsigned int maple_nvram_base;
133 unsigned int maple_nvram_offset;
134 unsigned int maple_nvram_command;
135 struct device_node *sp;
137 maple_nvram_base = maple_find_nvram_base();
138 if (maple_nvram_base == 0)
141 /* find service processor device */
142 sp = of_find_node_by_name(NULL, "service-processor");
144 printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
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);
154 outb_p(maple_nvram_command, maple_nvram_base + maple_nvram_offset);
157 printk(KERN_EMERG "Maple: Manual Power-Down Required\n");
160 static void maple_halt(void)
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,
174 #endif /* CONFIG_SMP */
176 void __init maple_setup_arch(void)
178 /* init to some ~sane value until calibrate_delay() runs */
179 loops_per_jiffy = 50000000;
181 /* Setup SMP callback */
183 smp_ops = &maple_smp_ops;
185 /* Lookup PCI hosts */
188 #ifdef CONFIG_DUMMY_CONSOLE
189 conswitchp = &dummy_con;
192 printk(KERN_DEBUG "Using native/NAP idle loop\n");
196 * Early initialization.
198 static void __init maple_init_early(void)
200 DBG(" -> maple_init_early\n");
202 /* Setup interrupt mapping options */
203 ppc64_interrupt_controller = IC_OPEN_PIC;
205 iommu_init_early_dart();
207 DBG(" <- maple_init_early\n");
211 static __init void maple_init_IRQ(void)
213 struct device_node *root;
214 unsigned int *opprop;
215 unsigned long opic_addr;
217 unsigned char senses[128];
220 DBG(" -> maple_init_IRQ\n");
222 /* XXX: Non standard, replace that with a proper openpic/mpic node
223 * in the device-tree. Find the Open PIC if present */
224 root = of_find_node_by_path("/");
225 opprop = (unsigned int *) get_property(root,
226 "platform-open-pic", NULL);
228 panic("OpenPIC not found !\n");
230 n = prom_n_addr_cells(root);
231 for (opic_addr = 0; n > 0; --n)
232 opic_addr = (opic_addr << 32) + *opprop++;
235 /* Obtain sense values from device-tree */
236 prom_get_irq_senses(senses, 0, 128);
238 mpic = mpic_alloc(opic_addr,
239 MPIC_PRIMARY | MPIC_BIG_ENDIAN |
240 MPIC_BROKEN_U3 | MPIC_WANTS_RESET,
241 0, 0, 128, 128, senses, 128, "U3-MPIC");
242 BUG_ON(mpic == NULL);
245 DBG(" <- maple_init_IRQ\n");
248 static void __init maple_progress(char *s, unsigned short hex)
250 printk("*** %04x : %s\n", hex, s ? s : "");
255 * Called very early, MMU is off, device-tree isn't unflattened
257 static int __init maple_probe(void)
259 unsigned long root = of_get_flat_dt_root();
260 if (!of_flat_dt_is_compatible(root, "Momentum,Maple"))
263 * On U3, the DART (iommu) must be allocated now since it
264 * has an impact on htab_initialize (due to the large page it
265 * occupies having to be broken up so the DART itself is not
266 * part of the cacheable linar mapping
275 define_machine(maple_md) {
277 .probe = maple_probe,
278 .setup_arch = maple_setup_arch,
279 .init_early = maple_init_early,
280 .init_IRQ = maple_init_IRQ,
281 .get_irq = mpic_get_irq,
282 .pcibios_fixup = maple_pcibios_fixup,
283 .pci_get_legacy_ide_irq = maple_pci_get_legacy_ide_irq,
284 .restart = maple_restart,
285 .power_off = maple_power_off,
287 .get_boot_time = maple_get_boot_time,
288 .set_rtc_time = maple_set_rtc_time,
289 .get_rtc_time = maple_get_rtc_time,
290 .calibrate_decr = generic_calibrate_decr,
291 .progress = maple_progress,
292 .power_save = power4_idle,
294 .machine_kexec = default_machine_kexec,
295 .machine_kexec_prepare = default_machine_kexec_prepare,
296 .machine_crash_shutdown = default_machine_crash_shutdown,