~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/arch/powerpc/platforms/powernv/setup.c

Version: ~ [ linux-5.8-rc5 ] ~ [ linux-5.7.8 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.51 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.132 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.188 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.230 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.230 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.85 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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>
 32 #include <asm/rtas.h>
 33 #include <asm/opal.h>
 34 
 35 #include "powernv.h"
 36 
 37 static void __init pnv_setup_arch(void)
 38 {
 39         /* Initialize SMP */
 40         pnv_smp_init();
 41 
 42         /* Setup PCI */
 43         pnv_pci_init();
 44 
 45         /* Setup RTC and NVRAM callbacks */
 46         if (firmware_has_feature(FW_FEATURE_OPAL))
 47                 opal_nvram_init();
 48 
 49         /* Enable NAP mode */
 50         powersave_nap = 1;
 51 
 52         /* XXX PMCS */
 53 }
 54 
 55 static void __init pnv_init_early(void)
 56 {
 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);
 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);
 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");
 87         else
 88                 seq_printf(m, "firmware\t: BML\n");
 89         of_node_put(root);
 90 }
 91 
 92 static void  __noreturn pnv_restart(char *cmd)
 93 {
 94         long rc = OPAL_BUSY;
 95 
 96         opal_notifier_disable();
 97 
 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);
107 }
108 
109 static void __noreturn pnv_power_off(void)
110 {
111         long rc = OPAL_BUSY;
112 
113         opal_notifier_disable();
114 
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);
124 }
125 
126 static void __noreturn pnv_halt(void)
127 {
128         pnv_power_off();
129 }
130 
131 static void pnv_progress(char *s, unsigned short hex)
132 {
133 }
134 
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 
146 #ifdef CONFIG_KEXEC
147 static void pnv_kexec_cpu_down(int crash_shutdown, int secondary)
148 {
149         xics_kexec_teardown_cpu(secondary);
150 }
151 #endif /* CONFIG_KEXEC */
152 
153 static void __init pnv_setup_machdep_opal(void)
154 {
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;
162 }
163 
164 #ifdef CONFIG_PPC_POWERNV_RTAS
165 static void __init pnv_setup_machdep_rtas(void)
166 {
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;
175 }
176 #endif /* CONFIG_PPC_POWERNV_RTAS */
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 
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 
194         pr_debug("PowerNV detected !\n");
195 
196         return 1;
197 }
198 
199 define_machine(powernv) {
200         .name                   = "PowerNV",
201         .probe                  = pnv_probe,
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,
210 #ifdef CONFIG_KEXEC
211         .kexec_cpu_down         = pnv_kexec_cpu_down,
212 #endif
213 };
214 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp