1
2
3
4
5
6
7
8
9
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/of_fdt.h>
27#include <linux/interrupt.h>
28#include <linux/bug.h>
29
30#include <asm/machdep.h>
31#include <asm/firmware.h>
32#include <asm/xics.h>
33#include <asm/rtas.h>
34#include <asm/opal.h>
35#include <asm/kexec.h>
36
37#include "powernv.h"
38
39static void __init pnv_setup_arch(void)
40{
41
42 pnv_smp_init();
43
44
45 pnv_pci_init();
46
47
48 if (firmware_has_feature(FW_FEATURE_OPAL))
49 opal_nvram_init();
50
51
52 powersave_nap = 1;
53
54
55}
56
57static void __init pnv_init_early(void)
58{
59
60
61
62
63 opal_lpc_init();
64
65#ifdef CONFIG_HVC_OPAL
66 if (firmware_has_feature(FW_FEATURE_OPAL))
67 hvc_opal_init_early();
68 else
69#endif
70 add_preferred_console("hvc", 0, NULL);
71}
72
73static void __init pnv_init_IRQ(void)
74{
75 xics_init();
76
77 WARN_ON(!ppc_md.get_irq);
78}
79
80static void pnv_show_cpuinfo(struct seq_file *m)
81{
82 struct device_node *root;
83 const char *model = "";
84
85 root = of_find_node_by_path("/");
86 if (root)
87 model = of_get_property(root, "model", NULL);
88 seq_printf(m, "machine\t\t: PowerNV %s\n", model);
89 if (firmware_has_feature(FW_FEATURE_OPALv3))
90 seq_printf(m, "firmware\t: OPAL v3\n");
91 else if (firmware_has_feature(FW_FEATURE_OPALv2))
92 seq_printf(m, "firmware\t: OPAL v2\n");
93 else if (firmware_has_feature(FW_FEATURE_OPAL))
94 seq_printf(m, "firmware\t: OPAL v1\n");
95 else
96 seq_printf(m, "firmware\t: BML\n");
97 of_node_put(root);
98}
99
100static void __noreturn pnv_restart(char *cmd)
101{
102 long rc = OPAL_BUSY;
103
104 opal_notifier_disable();
105
106 while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) {
107 rc = opal_cec_reboot();
108 if (rc == OPAL_BUSY_EVENT)
109 opal_poll_events(NULL);
110 else
111 mdelay(10);
112 }
113 for (;;)
114 opal_poll_events(NULL);
115}
116
117static void __noreturn pnv_power_off(void)
118{
119 long rc = OPAL_BUSY;
120
121 opal_notifier_disable();
122
123 while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) {
124 rc = opal_cec_power_down(0);
125 if (rc == OPAL_BUSY_EVENT)
126 opal_poll_events(NULL);
127 else
128 mdelay(10);
129 }
130 for (;;)
131 opal_poll_events(NULL);
132}
133
134static void __noreturn pnv_halt(void)
135{
136 pnv_power_off();
137}
138
139static void pnv_progress(char *s, unsigned short hex)
140{
141}
142
143static void pnv_shutdown(void)
144{
145
146 pnv_pci_shutdown();
147
148
149
150
151 opal_shutdown();
152}
153
154#ifdef CONFIG_KEXEC
155static void pnv_kexec_cpu_down(int crash_shutdown, int secondary)
156{
157 xics_kexec_teardown_cpu(secondary);
158
159
160 if (firmware_has_feature(FW_FEATURE_OPALv3) && secondary) {
161 mb();
162 get_paca()->kexec_state = KEXEC_STATE_REAL_MODE;
163 mb();
164
165
166 opal_return_cpu();
167 }
168}
169#endif
170
171static void __init pnv_setup_machdep_opal(void)
172{
173 ppc_md.get_boot_time = opal_get_boot_time;
174 ppc_md.get_rtc_time = opal_get_rtc_time;
175 ppc_md.set_rtc_time = opal_set_rtc_time;
176 ppc_md.restart = pnv_restart;
177 ppc_md.power_off = pnv_power_off;
178 ppc_md.halt = pnv_halt;
179 ppc_md.machine_check_exception = opal_machine_check;
180}
181
182#ifdef CONFIG_PPC_POWERNV_RTAS
183static void __init pnv_setup_machdep_rtas(void)
184{
185 if (rtas_token("get-time-of-day") != RTAS_UNKNOWN_SERVICE) {
186 ppc_md.get_boot_time = rtas_get_boot_time;
187 ppc_md.get_rtc_time = rtas_get_rtc_time;
188 ppc_md.set_rtc_time = rtas_set_rtc_time;
189 }
190 ppc_md.restart = rtas_restart;
191 ppc_md.power_off = rtas_power_off;
192 ppc_md.halt = rtas_halt;
193}
194#endif
195
196static int __init pnv_probe(void)
197{
198 unsigned long root = of_get_flat_dt_root();
199
200 if (!of_flat_dt_is_compatible(root, "ibm,powernv"))
201 return 0;
202
203 hpte_init_native();
204
205 if (firmware_has_feature(FW_FEATURE_OPAL))
206 pnv_setup_machdep_opal();
207#ifdef CONFIG_PPC_POWERNV_RTAS
208 else if (rtas.base)
209 pnv_setup_machdep_rtas();
210#endif
211
212 pr_debug("PowerNV detected !\n");
213
214 return 1;
215}
216
217define_machine(powernv) {
218 .name = "PowerNV",
219 .probe = pnv_probe,
220 .init_early = pnv_init_early,
221 .setup_arch = pnv_setup_arch,
222 .init_IRQ = pnv_init_IRQ,
223 .show_cpuinfo = pnv_show_cpuinfo,
224 .progress = pnv_progress,
225 .machine_shutdown = pnv_shutdown,
226 .power_save = power7_idle,
227 .calibrate_decr = generic_calibrate_decr,
228#ifdef CONFIG_KEXEC
229 .kexec_cpu_down = pnv_kexec_cpu_down,
230#endif
231};
232