blob: f0242f3fd3e65a3ce2daadf4cb4e9e4d2f351492 [file] [log] [blame]
Benjamin Herrenschmidt55190f82011-09-19 17:44:52 +00001/*
2 * PowerNV setup code.
3 *
4 * Copyright 2011 IBM Corp.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 */
11
12#undef DEBUG
13
14#include <linux/cpu.h>
15#include <linux/errno.h>
16#include <linux/sched.h>
17#include <linux/kernel.h>
18#include <linux/tty.h>
19#include <linux/reboot.h>
20#include <linux/init.h>
21#include <linux/console.h>
22#include <linux/delay.h>
23#include <linux/irq.h>
24#include <linux/seq_file.h>
25#include <linux/of.h>
26#include <linux/interrupt.h>
27#include <linux/bug.h>
28
29#include <asm/machdep.h>
30#include <asm/firmware.h>
31#include <asm/xics.h>
Benjamin Herrenschmidt628daa82011-09-19 17:45:01 +000032#include <asm/rtas.h>
Benjamin Herrenschmidtdaea1172011-09-19 17:44:59 +000033#include <asm/opal.h>
Benjamin Herrenschmidt628daa82011-09-19 17:45:01 +000034#include <asm/xics.h>
Benjamin Herrenschmidt55190f82011-09-19 17:44:52 +000035
36#include "powernv.h"
37
38static void __init pnv_setup_arch(void)
39{
Benjamin Herrenschmidt55190f82011-09-19 17:44:52 +000040 /* Initialize SMP */
41 pnv_smp_init();
42
43 /* XXX PCI */
44
Benjamin Herrenschmidt628daa82011-09-19 17:45:01 +000045 /* Setup RTC and NVRAM callbacks */
46 if (firmware_has_feature(FW_FEATURE_OPAL))
47 opal_nvram_init();
Benjamin Herrenschmidt55190f82011-09-19 17:44:52 +000048
49 /* Enable NAP mode */
50 powersave_nap = 1;
51
52 /* XXX PMCS */
53}
54
55static void __init pnv_init_early(void)
56{
Benjamin Herrenschmidtdaea1172011-09-19 17:44:59 +000057#ifdef CONFIG_HVC_OPAL
58 if (firmware_has_feature(FW_FEATURE_OPAL))
59 hvc_opal_init_early();
60 else
61#endif
62 add_preferred_console("hvc", 0, NULL);
Benjamin Herrenschmidt55190f82011-09-19 17:44:52 +000063}
64
65static void __init pnv_init_IRQ(void)
66{
67 xics_init();
68
69 WARN_ON(!ppc_md.get_irq);
70}
71
72static void pnv_show_cpuinfo(struct seq_file *m)
73{
74 struct device_node *root;
75 const char *model = "";
76
77 root = of_find_node_by_path("/");
78 if (root)
79 model = of_get_property(root, "model", NULL);
80 seq_printf(m, "machine\t\t: PowerNV %s\n", model);
Benjamin Herrenschmidt14a43e62011-09-19 17:44:57 +000081 if (firmware_has_feature(FW_FEATURE_OPALv2))
82 seq_printf(m, "firmware\t: OPAL v2\n");
83 else if (firmware_has_feature(FW_FEATURE_OPAL))
84 seq_printf(m, "firmware\t: OPAL v1\n");
85 else
86 seq_printf(m, "firmware\t: BML\n");
Benjamin Herrenschmidt55190f82011-09-19 17:44:52 +000087 of_node_put(root);
88}
89
Benjamin Herrenschmidtec273292011-09-19 18:28:03 +000090static void __noreturn pnv_restart(char *cmd)
Benjamin Herrenschmidt55190f82011-09-19 17:44:52 +000091{
Benjamin Herrenschmidtec273292011-09-19 18:28:03 +000092 long rc = OPAL_BUSY;
93
94 while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) {
95 rc = opal_cec_reboot();
96 if (rc == OPAL_BUSY_EVENT)
97 opal_poll_events(NULL);
98 else
99 mdelay(10);
100 }
101 for (;;)
102 opal_poll_events(NULL);
Benjamin Herrenschmidt55190f82011-09-19 17:44:52 +0000103}
104
Benjamin Herrenschmidtec273292011-09-19 18:28:03 +0000105static void __noreturn pnv_power_off(void)
Benjamin Herrenschmidt55190f82011-09-19 17:44:52 +0000106{
Benjamin Herrenschmidtec273292011-09-19 18:28:03 +0000107 long rc = OPAL_BUSY;
108
109 while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) {
110 rc = opal_cec_power_down(0);
111 if (rc == OPAL_BUSY_EVENT)
112 opal_poll_events(NULL);
113 else
114 mdelay(10);
115 }
116 for (;;)
117 opal_poll_events(NULL);
Benjamin Herrenschmidt55190f82011-09-19 17:44:52 +0000118}
119
Benjamin Herrenschmidtec273292011-09-19 18:28:03 +0000120static void __noreturn pnv_halt(void)
Benjamin Herrenschmidt55190f82011-09-19 17:44:52 +0000121{
Benjamin Herrenschmidtec273292011-09-19 18:28:03 +0000122 pnv_power_off();
Benjamin Herrenschmidt55190f82011-09-19 17:44:52 +0000123}
124
Benjamin Herrenschmidt55190f82011-09-19 17:44:52 +0000125static void pnv_progress(char *s, unsigned short hex)
126{
127}
128
129#ifdef CONFIG_KEXEC
130static void pnv_kexec_cpu_down(int crash_shutdown, int secondary)
131{
132 xics_kexec_teardown_cpu(secondary);
133}
134#endif /* CONFIG_KEXEC */
135
Benjamin Herrenschmidt628daa82011-09-19 17:45:01 +0000136static void __init pnv_setup_machdep_opal(void)
137{
138 ppc_md.get_boot_time = opal_get_boot_time;
139 ppc_md.get_rtc_time = opal_get_rtc_time;
140 ppc_md.set_rtc_time = opal_set_rtc_time;
141 ppc_md.restart = pnv_restart;
142 ppc_md.power_off = pnv_power_off;
143 ppc_md.halt = pnv_halt;
Benjamin Herrenschmidted79ba92011-09-19 17:45:04 +0000144 ppc_md.machine_check_exception = opal_machine_check;
Benjamin Herrenschmidt628daa82011-09-19 17:45:01 +0000145}
146
147#ifdef CONFIG_PPC_POWERNV_RTAS
148static void __init pnv_setup_machdep_rtas(void)
149{
150 if (rtas_token("get-time-of-day") != RTAS_UNKNOWN_SERVICE) {
151 ppc_md.get_boot_time = rtas_get_boot_time;
152 ppc_md.get_rtc_time = rtas_get_rtc_time;
153 ppc_md.set_rtc_time = rtas_set_rtc_time;
154 }
155 ppc_md.restart = rtas_restart;
156 ppc_md.power_off = rtas_power_off;
157 ppc_md.halt = rtas_halt;
158}
159#endif /* CONFIG_PPC_POWERNV_RTAS */
160
Benjamin Herrenschmidt55190f82011-09-19 17:44:52 +0000161static int __init pnv_probe(void)
162{
163 unsigned long root = of_get_flat_dt_root();
164
165 if (!of_flat_dt_is_compatible(root, "ibm,powernv"))
166 return 0;
167
168 hpte_init_native();
169
Benjamin Herrenschmidt628daa82011-09-19 17:45:01 +0000170 if (firmware_has_feature(FW_FEATURE_OPAL))
171 pnv_setup_machdep_opal();
172#ifdef CONFIG_PPC_POWERNV_RTAS
173 else if (rtas.base)
174 pnv_setup_machdep_rtas();
175#endif /* CONFIG_PPC_POWERNV_RTAS */
176
Benjamin Herrenschmidt55190f82011-09-19 17:44:52 +0000177 pr_debug("PowerNV detected !\n");
178
179 return 1;
180}
181
182define_machine(powernv) {
183 .name = "PowerNV",
184 .probe = pnv_probe,
Benjamin Herrenschmidt55190f82011-09-19 17:44:52 +0000185 .init_early = pnv_init_early,
Benjamin Herrenschmidt628daa82011-09-19 17:45:01 +0000186 .setup_arch = pnv_setup_arch,
Benjamin Herrenschmidt55190f82011-09-19 17:44:52 +0000187 .init_IRQ = pnv_init_IRQ,
188 .show_cpuinfo = pnv_show_cpuinfo,
Benjamin Herrenschmidt55190f82011-09-19 17:44:52 +0000189 .progress = pnv_progress,
190 .power_save = power7_idle,
191 .calibrate_decr = generic_calibrate_decr,
192#ifdef CONFIG_KEXEC
193 .kexec_cpu_down = pnv_kexec_cpu_down,
194#endif
195};