setup.c (3a37471551cd3b287ce7f02ed25bcf8ec37a191d) setup.c (243e25112d06b348f087a6f7aba4bbc288285bdd)
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

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27#include <linux/interrupt.h>
28#include <linux/bug.h>
29#include <linux/pci.h>
30#include <linux/cpufreq.h>
31
32#include <asm/machdep.h>
33#include <asm/firmware.h>
34#include <asm/xics.h>
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

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27#include <linux/interrupt.h>
28#include <linux/bug.h>
29#include <linux/pci.h>
30#include <linux/cpufreq.h>
31
32#include <asm/machdep.h>
33#include <asm/firmware.h>
34#include <asm/xics.h>
35#include <asm/xive.h>
35#include <asm/opal.h>
36#include <asm/kexec.h>
37#include <asm/smp.h>
38
39#include "powernv.h"
40
41static void __init pnv_setup_arch(void)
42{

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71 hvc_opal_init_early();
72 else
73#endif
74 add_preferred_console("hvc", 0, NULL);
75}
76
77static void __init pnv_init_IRQ(void)
78{
36#include <asm/opal.h>
37#include <asm/kexec.h>
38#include <asm/smp.h>
39
40#include "powernv.h"
41
42static void __init pnv_setup_arch(void)
43{

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72 hvc_opal_init_early();
73 else
74#endif
75 add_preferred_console("hvc", 0, NULL);
76}
77
78static void __init pnv_init_IRQ(void)
79{
79 xics_init();
80 /* Try using a XIVE if available, otherwise use a XICS */
81 if (!xive_native_init())
82 xics_init();
80
81 WARN_ON(!ppc_md.get_irq);
82}
83
84static void pnv_show_cpuinfo(struct seq_file *m)
85{
86 struct device_node *root;
87 const char *model = "";

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213 break;
214 }
215 }
216 }
217}
218
219static void pnv_kexec_cpu_down(int crash_shutdown, int secondary)
220{
83
84 WARN_ON(!ppc_md.get_irq);
85}
86
87static void pnv_show_cpuinfo(struct seq_file *m)
88{
89 struct device_node *root;
90 const char *model = "";

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216 break;
217 }
218 }
219 }
220}
221
222static void pnv_kexec_cpu_down(int crash_shutdown, int secondary)
223{
221 xics_kexec_teardown_cpu(secondary);
224 if (xive_enabled())
225 xive_kexec_teardown_cpu(secondary);
226 else
227 xics_kexec_teardown_cpu(secondary);
222
223 /* On OPAL, we return all CPUs to firmware */
228
229 /* On OPAL, we return all CPUs to firmware */
224
225 if (!firmware_has_feature(FW_FEATURE_OPAL))
226 return;
227
228 if (secondary) {
229 /* Return secondary CPUs to firmware on OPAL v3 */
230 mb();
231 get_paca()->kexec_state = KEXEC_STATE_REAL_MODE;
232 mb();
233
234 /* Return the CPU to OPAL */
235 opal_return_cpu();
236 } else {
237 /* Primary waits for the secondaries to have reached OPAL */
238 pnv_kexec_wait_secondaries_down();
239
230 if (!firmware_has_feature(FW_FEATURE_OPAL))
231 return;
232
233 if (secondary) {
234 /* Return secondary CPUs to firmware on OPAL v3 */
235 mb();
236 get_paca()->kexec_state = KEXEC_STATE_REAL_MODE;
237 mb();
238
239 /* Return the CPU to OPAL */
240 opal_return_cpu();
241 } else {
242 /* Primary waits for the secondaries to have reached OPAL */
243 pnv_kexec_wait_secondaries_down();
244
245 /* Switch XIVE back to emulation mode */
246 if (xive_enabled())
247 xive_shutdown();
248
240 /*
241 * We might be running as little-endian - now that interrupts
242 * are disabled, reset the HILE bit to big-endian so we don't
243 * take interrupts in the wrong endian later
244 */
245 opal_reinit_cpus(OPAL_REINIT_CPUS_HILE_BE);
246 }
247}

--- 73 unchanged lines hidden --- 		249 /*
250 * We might be running as little-endian - now that interrupts
251 * are disabled, reset the HILE bit to big-endian so we don't
252 * take interrupts in the wrong endian later
253 */
254 opal_reinit_cpus(OPAL_REINIT_CPUS_HILE_BE);
255 }
256}

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