setup.c revision 21fb5a1d9f554970c680b801ba32184bc7c34aa0 
1/*
2 *  linux/arch/powerpc/platforms/cell/cell_setup.c
3 *
4 *  Copyright (C) 1995  Linus Torvalds
5 *  Adapted from 'alpha' version by Gary Thomas
6 *  Modified by Cort Dougan (cort@cs.nmt.edu)
7 *  Modified by PPC64 Team, IBM Corp
8 *  Modified by Cell Team, IBM Deutschland Entwicklung GmbH
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 */
15#undef DEBUG
16
17#include <linux/sched.h>
18#include <linux/kernel.h>
19#include <linux/mm.h>
20#include <linux/stddef.h>
21#include <linux/unistd.h>
22#include <linux/slab.h>
23#include <linux/user.h>
24#include <linux/reboot.h>
25#include <linux/init.h>
26#include <linux/delay.h>
27#include <linux/irq.h>
28#include <linux/seq_file.h>
29#include <linux/root_dev.h>
30#include <linux/console.h>
31#include <linux/mutex.h>
32#include <linux/memory_hotplug.h>
33
34#include <asm/mmu.h>
35#include <asm/processor.h>
36#include <asm/io.h>
37#include <asm/kexec.h>
38#include <asm/pgtable.h>
39#include <asm/prom.h>
40#include <asm/rtas.h>
41#include <asm/pci-bridge.h>
42#include <asm/iommu.h>
43#include <asm/dma.h>
44#include <asm/machdep.h>
45#include <asm/time.h>
46#include <asm/nvram.h>
47#include <asm/cputable.h>
48#include <asm/ppc-pci.h>
49#include <asm/irq.h>
50#include <asm/spu.h>
51#include <asm/spu_priv1.h>
52#include <asm/udbg.h>
53#include <asm/mpic.h>
54
55#include "interrupt.h"
56#include "iommu.h"
57#include "cbe_regs.h"
58#include "pervasive.h"
59#include "ras.h"
60
61#ifdef DEBUG
62#define DBG(fmt...) udbg_printf(fmt)
63#else
64#define DBG(fmt...)
65#endif
66
67static void cell_show_cpuinfo(struct seq_file *m)
68{
69	struct device_node *root;
70	const char *model = "";
71
72	root = of_find_node_by_path("/");
73	if (root)
74		model = get_property(root, "model", NULL);
75	seq_printf(m, "machine\t\t: CHRP %s\n", model);
76	of_node_put(root);
77}
78
79static void cell_progress(char *s, unsigned short hex)
80{
81	printk("*** %04x : %s\n", hex, s ? s : "");
82}
83
84static void cell_mpic_cascade(unsigned int irq, struct irq_desc *desc)
85{
86	struct mpic *mpic = desc->handler_data;
87	unsigned int virq;
88
89	virq = mpic_get_one_irq(mpic);
90	if (virq != NO_IRQ)
91		generic_handle_irq(virq);
92	desc->chip->eoi(irq);
93}
94
95static void __init mpic_init_IRQ(void)
96{
97	struct device_node *dn;
98	struct mpic *mpic;
99	unsigned int virq;
100
101	for (dn = NULL;
102	     (dn = of_find_node_by_name(dn, "interrupt-controller"));) {
103		if (!device_is_compatible(dn, "CBEA,platform-open-pic"))
104			continue;
105
106		/* The MPIC driver will get everything it needs from the
107		 * device-tree, just pass 0 to all arguments
108		 */
109		mpic = mpic_alloc(dn, 0, 0, 0, 0, " MPIC     ");
110		if (mpic == NULL)
111			continue;
112		mpic_init(mpic);
113
114		virq = irq_of_parse_and_map(dn, 0);
115		if (virq == NO_IRQ)
116			continue;
117
118		printk(KERN_INFO "%s : hooking up to IRQ %d\n",
119		       dn->full_name, virq);
120		set_irq_data(virq, mpic);
121		set_irq_chained_handler(virq, cell_mpic_cascade);
122	}
123}
124
125
126static void __init cell_init_irq(void)
127{
128	iic_init_IRQ();
129	spider_init_IRQ();
130	mpic_init_IRQ();
131}
132
133static void __init cell_setup_arch(void)
134{
135#ifdef CONFIG_SPU_BASE
136	spu_priv1_ops         = &spu_priv1_mmio_ops;
137#endif
138
139	cbe_regs_init();
140
141#ifdef CONFIG_CBE_RAS
142	cbe_ras_init();
143#endif
144
145#ifdef CONFIG_SMP
146	smp_init_cell();
147#endif
148
149	/* init to some ~sane value until calibrate_delay() runs */
150	loops_per_jiffy = 50000000;
151
152	if (ROOT_DEV == 0) {
153		printk("No ramdisk, default root is /dev/hda2\n");
154		ROOT_DEV = Root_HDA2;
155	}
156
157	/* Find and initialize PCI host bridges */
158	init_pci_config_tokens();
159	find_and_init_phbs();
160	cbe_pervasive_init();
161#ifdef CONFIG_DUMMY_CONSOLE
162	conswitchp = &dummy_con;
163#endif
164
165	mmio_nvram_init();
166}
167
168/*
169 * Early initialization.  Relocation is on but do not reference unbolted pages
170 */
171static void __init cell_init_early(void)
172{
173	DBG(" -> cell_init_early()\n");
174
175	cell_init_iommu();
176
177	DBG(" <- cell_init_early()\n");
178}
179
180
181static int __init cell_probe(void)
182{
183	unsigned long root = of_get_flat_dt_root();
184
185	if (!of_flat_dt_is_compatible(root, "IBM,CBEA") &&
186	    !of_flat_dt_is_compatible(root, "IBM,CPBW-1.0"))
187		return 0;
188
189	hpte_init_native();
190
191	return 1;
192}
193
194/*
195 * Cell has no legacy IO; anything calling this function has to
196 * fail or bad things will happen
197 */
198static int cell_check_legacy_ioport(unsigned int baseport)
199{
200	return -ENODEV;
201}
202
203define_machine(cell) {
204	.name			= "Cell",
205	.probe			= cell_probe,
206	.setup_arch		= cell_setup_arch,
207	.init_early		= cell_init_early,
208	.show_cpuinfo		= cell_show_cpuinfo,
209	.restart		= rtas_restart,
210	.power_off		= rtas_power_off,
211	.halt			= rtas_halt,
212	.get_boot_time		= rtas_get_boot_time,
213	.get_rtc_time		= rtas_get_rtc_time,
214	.set_rtc_time		= rtas_set_rtc_time,
215	.calibrate_decr		= generic_calibrate_decr,
216	.check_legacy_ioport	= cell_check_legacy_ioport,
217	.progress		= cell_progress,
218	.init_IRQ       	= cell_init_irq,
219#ifdef CONFIG_KEXEC
220	.machine_kexec		= default_machine_kexec,
221	.machine_kexec_prepare	= default_machine_kexec_prepare,
222	.machine_crash_shutdown	= default_machine_crash_shutdown,
223#endif
224};
225