4 * Copyright 2011 IBM Corp.
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.
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>
26 #include <linux/interrupt.h>
27 #include <linux/bug.h>
29 #include <asm/machdep.h>
30 #include <asm/firmware.h>
37 static void __init pnv_setup_arch(void)
45 /* Setup RTC and NVRAM callbacks */
46 if (firmware_has_feature(FW_FEATURE_OPAL))
55 static void __init pnv_init_early(void)
57 #ifdef CONFIG_HVC_OPAL
58 if (firmware_has_feature(FW_FEATURE_OPAL))
59 hvc_opal_init_early();
62 add_preferred_console("hvc", 0, NULL);
65 static void __init pnv_init_IRQ(void)
69 WARN_ON(!ppc_md.get_irq);
72 static void pnv_show_cpuinfo(struct seq_file *m)
74 struct device_node *root;
75 const char *model = "";
77 root = of_find_node_by_path("/");
79 model = of_get_property(root, "model", NULL);
80 seq_printf(m, "machine\t\t: PowerNV %s\n", model);
81 if (firmware_has_feature(FW_FEATURE_OPALv3))
82 seq_printf(m, "firmware\t: OPAL v3\n");
83 else if (firmware_has_feature(FW_FEATURE_OPALv2))
84 seq_printf(m, "firmware\t: OPAL v2\n");
85 else if (firmware_has_feature(FW_FEATURE_OPAL))
86 seq_printf(m, "firmware\t: OPAL v1\n");
88 seq_printf(m, "firmware\t: BML\n");
92 static void __noreturn pnv_restart(char *cmd)
96 opal_notifier_disable();
98 while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) {
99 rc = opal_cec_reboot();
100 if (rc == OPAL_BUSY_EVENT)
101 opal_poll_events(NULL);
106 opal_poll_events(NULL);
109 static void __noreturn pnv_power_off(void)
113 opal_notifier_disable();
115 while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) {
116 rc = opal_cec_power_down(0);
117 if (rc == OPAL_BUSY_EVENT)
118 opal_poll_events(NULL);
123 opal_poll_events(NULL);
126 static void __noreturn pnv_halt(void)
131 static void pnv_progress(char *s, unsigned short hex)
135 static void pnv_shutdown(void)
137 /* Let the PCI code clear up IODA tables */
140 /* And unregister all OPAL interrupts so they don't fire
147 static void pnv_kexec_cpu_down(int crash_shutdown, int secondary)
149 xics_kexec_teardown_cpu(secondary);
151 #endif /* CONFIG_KEXEC */
153 static void __init pnv_setup_machdep_opal(void)
155 ppc_md.get_boot_time = opal_get_boot_time;
156 ppc_md.get_rtc_time = opal_get_rtc_time;
157 ppc_md.set_rtc_time = opal_set_rtc_time;
158 ppc_md.restart = pnv_restart;
159 ppc_md.power_off = pnv_power_off;
160 ppc_md.halt = pnv_halt;
161 ppc_md.machine_check_exception = opal_machine_check;
164 #ifdef CONFIG_PPC_POWERNV_RTAS
165 static void __init pnv_setup_machdep_rtas(void)
167 if (rtas_token("get-time-of-day") != RTAS_UNKNOWN_SERVICE) {
168 ppc_md.get_boot_time = rtas_get_boot_time;
169 ppc_md.get_rtc_time = rtas_get_rtc_time;
170 ppc_md.set_rtc_time = rtas_set_rtc_time;
172 ppc_md.restart = rtas_restart;
173 ppc_md.power_off = rtas_power_off;
174 ppc_md.halt = rtas_halt;
176 #endif /* CONFIG_PPC_POWERNV_RTAS */
178 static int __init pnv_probe(void)
180 unsigned long root = of_get_flat_dt_root();
182 if (!of_flat_dt_is_compatible(root, "ibm,powernv"))
187 if (firmware_has_feature(FW_FEATURE_OPAL))
188 pnv_setup_machdep_opal();
189 #ifdef CONFIG_PPC_POWERNV_RTAS
191 pnv_setup_machdep_rtas();
192 #endif /* CONFIG_PPC_POWERNV_RTAS */
194 pr_debug("PowerNV detected !\n");
199 define_machine(powernv) {
202 .init_early = pnv_init_early,
203 .setup_arch = pnv_setup_arch,
204 .init_IRQ = pnv_init_IRQ,
205 .show_cpuinfo = pnv_show_cpuinfo,
206 .progress = pnv_progress,
207 .machine_shutdown = pnv_shutdown,
208 .power_save = power7_idle,
209 .calibrate_decr = generic_calibrate_decr,
211 .kexec_cpu_down = pnv_kexec_cpu_down,