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55190f88 BH |
1 | /* |
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> | |
628daa8d | 32 | #include <asm/rtas.h> |
daea1175 | 33 | #include <asm/opal.h> |
55190f88 BH |
34 | |
35 | #include "powernv.h" | |
36 | ||
37 | static void __init pnv_setup_arch(void) | |
38 | { | |
55190f88 BH |
39 | /* Initialize SMP */ |
40 | pnv_smp_init(); | |
41 | ||
61305a96 BH |
42 | /* Setup PCI */ |
43 | pnv_pci_init(); | |
55190f88 | 44 | |
628daa8d BH |
45 | /* Setup RTC and NVRAM callbacks */ |
46 | if (firmware_has_feature(FW_FEATURE_OPAL)) | |
47 | opal_nvram_init(); | |
55190f88 BH |
48 | |
49 | /* Enable NAP mode */ | |
50 | powersave_nap = 1; | |
51 | ||
52 | /* XXX PMCS */ | |
53 | } | |
54 | ||
55 | static void __init pnv_init_early(void) | |
56 | { | |
daea1175 BH |
57 | #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); | |
55190f88 BH |
63 | } |
64 | ||
65 | static void __init pnv_init_IRQ(void) | |
66 | { | |
67 | xics_init(); | |
68 | ||
69 | WARN_ON(!ppc_md.get_irq); | |
70 | } | |
71 | ||
72 | static 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); | |
75b93da4 BH |
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)) | |
14a43e69 BH |
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"); | |
87 | else | |
88 | seq_printf(m, "firmware\t: BML\n"); | |
55190f88 BH |
89 | of_node_put(root); |
90 | } | |
91 | ||
ec27329f | 92 | static void __noreturn pnv_restart(char *cmd) |
55190f88 | 93 | { |
ec27329f BH |
94 | long rc = OPAL_BUSY; |
95 | ||
e8e71fa4 GS |
96 | opal_notifier_disable(); |
97 | ||
ec27329f BH |
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); | |
102 | else | |
103 | mdelay(10); | |
104 | } | |
105 | for (;;) | |
106 | opal_poll_events(NULL); | |
55190f88 BH |
107 | } |
108 | ||
ec27329f | 109 | static void __noreturn pnv_power_off(void) |
55190f88 | 110 | { |
ec27329f BH |
111 | long rc = OPAL_BUSY; |
112 | ||
e8e71fa4 GS |
113 | opal_notifier_disable(); |
114 | ||
ec27329f BH |
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); | |
119 | else | |
120 | mdelay(10); | |
121 | } | |
122 | for (;;) | |
123 | opal_poll_events(NULL); | |
55190f88 BH |
124 | } |
125 | ||
ec27329f | 126 | static void __noreturn pnv_halt(void) |
55190f88 | 127 | { |
ec27329f | 128 | pnv_power_off(); |
55190f88 BH |
129 | } |
130 | ||
628daa8d | 131 | static void pnv_progress(char *s, unsigned short hex) |
55190f88 BH |
132 | { |
133 | } | |
134 | ||
73ed148a BH |
135 | static void pnv_shutdown(void) |
136 | { | |
137 | /* Let the PCI code clear up IODA tables */ | |
138 | pnv_pci_shutdown(); | |
139 | ||
140 | /* And unregister all OPAL interrupts so they don't fire | |
141 | * up while we kexec | |
142 | */ | |
143 | opal_shutdown(); | |
144 | } | |
145 | ||
628daa8d BH |
146 | #ifdef CONFIG_KEXEC |
147 | static void pnv_kexec_cpu_down(int crash_shutdown, int secondary) | |
55190f88 | 148 | { |
628daa8d | 149 | xics_kexec_teardown_cpu(secondary); |
55190f88 | 150 | } |
628daa8d | 151 | #endif /* CONFIG_KEXEC */ |
55190f88 | 152 | |
628daa8d | 153 | static void __init pnv_setup_machdep_opal(void) |
55190f88 | 154 | { |
628daa8d BH |
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; | |
ed79ba9e | 161 | ppc_md.machine_check_exception = opal_machine_check; |
55190f88 BH |
162 | } |
163 | ||
628daa8d BH |
164 | #ifdef CONFIG_PPC_POWERNV_RTAS |
165 | static void __init pnv_setup_machdep_rtas(void) | |
55190f88 | 166 | { |
628daa8d BH |
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; | |
171 | } | |
172 | ppc_md.restart = rtas_restart; | |
173 | ppc_md.power_off = rtas_power_off; | |
174 | ppc_md.halt = rtas_halt; | |
55190f88 | 175 | } |
628daa8d | 176 | #endif /* CONFIG_PPC_POWERNV_RTAS */ |
55190f88 BH |
177 | |
178 | static int __init pnv_probe(void) | |
179 | { | |
180 | unsigned long root = of_get_flat_dt_root(); | |
181 | ||
182 | if (!of_flat_dt_is_compatible(root, "ibm,powernv")) | |
183 | return 0; | |
184 | ||
185 | hpte_init_native(); | |
186 | ||
628daa8d BH |
187 | if (firmware_has_feature(FW_FEATURE_OPAL)) |
188 | pnv_setup_machdep_opal(); | |
189 | #ifdef CONFIG_PPC_POWERNV_RTAS | |
190 | else if (rtas.base) | |
191 | pnv_setup_machdep_rtas(); | |
192 | #endif /* CONFIG_PPC_POWERNV_RTAS */ | |
193 | ||
55190f88 BH |
194 | pr_debug("PowerNV detected !\n"); |
195 | ||
196 | return 1; | |
197 | } | |
198 | ||
199 | define_machine(powernv) { | |
200 | .name = "PowerNV", | |
201 | .probe = pnv_probe, | |
55190f88 | 202 | .init_early = pnv_init_early, |
628daa8d | 203 | .setup_arch = pnv_setup_arch, |
55190f88 BH |
204 | .init_IRQ = pnv_init_IRQ, |
205 | .show_cpuinfo = pnv_show_cpuinfo, | |
55190f88 | 206 | .progress = pnv_progress, |
73ed148a | 207 | .machine_shutdown = pnv_shutdown, |
55190f88 BH |
208 | .power_save = power7_idle, |
209 | .calibrate_decr = generic_calibrate_decr, | |
210 | #ifdef CONFIG_KEXEC | |
211 | .kexec_cpu_down = pnv_kexec_cpu_down, | |
212 | #endif | |
213 | }; |