ed79ba9e15
OPAL can handle various interrupt for us such as Machine Checks (it performs all sorts of recovery tasks and passes back control to us with informations about the error), Hardware Management Interrupts and Softpatch interrupts. This wires up the mechanisms and prints out specific informations returned by HAL when a machine check occurs. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
195 lines
4.1 KiB
C
195 lines
4.1 KiB
C
/*
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* PowerNV setup code.
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*
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* Copyright 2011 IBM Corp.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#undef DEBUG
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#include <linux/cpu.h>
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#include <linux/errno.h>
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#include <linux/sched.h>
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#include <linux/kernel.h>
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#include <linux/tty.h>
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#include <linux/reboot.h>
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#include <linux/init.h>
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#include <linux/console.h>
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#include <linux/delay.h>
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#include <linux/irq.h>
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#include <linux/seq_file.h>
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#include <linux/of.h>
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#include <linux/interrupt.h>
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#include <linux/bug.h>
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#include <asm/machdep.h>
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#include <asm/firmware.h>
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#include <asm/xics.h>
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#include <asm/rtas.h>
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#include <asm/opal.h>
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#include <asm/xics.h>
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#include "powernv.h"
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static void __init pnv_setup_arch(void)
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{
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/* Initialize SMP */
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pnv_smp_init();
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/* XXX PCI */
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/* Setup RTC and NVRAM callbacks */
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if (firmware_has_feature(FW_FEATURE_OPAL))
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opal_nvram_init();
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/* Enable NAP mode */
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powersave_nap = 1;
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/* XXX PMCS */
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}
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static void __init pnv_init_early(void)
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{
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#ifdef CONFIG_HVC_OPAL
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if (firmware_has_feature(FW_FEATURE_OPAL))
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hvc_opal_init_early();
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else
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#endif
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add_preferred_console("hvc", 0, NULL);
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}
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static void __init pnv_init_IRQ(void)
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{
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xics_init();
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WARN_ON(!ppc_md.get_irq);
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}
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static void pnv_show_cpuinfo(struct seq_file *m)
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{
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struct device_node *root;
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const char *model = "";
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root = of_find_node_by_path("/");
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if (root)
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model = of_get_property(root, "model", NULL);
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seq_printf(m, "machine\t\t: PowerNV %s\n", model);
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if (firmware_has_feature(FW_FEATURE_OPALv2))
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seq_printf(m, "firmware\t: OPAL v2\n");
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else if (firmware_has_feature(FW_FEATURE_OPAL))
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seq_printf(m, "firmware\t: OPAL v1\n");
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else
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seq_printf(m, "firmware\t: BML\n");
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of_node_put(root);
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}
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static void __noreturn pnv_restart(char *cmd)
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{
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long rc = OPAL_BUSY;
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while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) {
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rc = opal_cec_reboot();
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if (rc == OPAL_BUSY_EVENT)
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opal_poll_events(NULL);
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else
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mdelay(10);
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}
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for (;;)
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opal_poll_events(NULL);
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}
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static void __noreturn pnv_power_off(void)
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{
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long rc = OPAL_BUSY;
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while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) {
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rc = opal_cec_power_down(0);
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if (rc == OPAL_BUSY_EVENT)
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opal_poll_events(NULL);
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else
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mdelay(10);
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}
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for (;;)
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opal_poll_events(NULL);
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}
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static void __noreturn pnv_halt(void)
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{
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pnv_power_off();
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}
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static void pnv_progress(char *s, unsigned short hex)
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{
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}
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#ifdef CONFIG_KEXEC
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static void pnv_kexec_cpu_down(int crash_shutdown, int secondary)
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{
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xics_kexec_teardown_cpu(secondary);
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}
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#endif /* CONFIG_KEXEC */
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static void __init pnv_setup_machdep_opal(void)
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{
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ppc_md.get_boot_time = opal_get_boot_time;
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ppc_md.get_rtc_time = opal_get_rtc_time;
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ppc_md.set_rtc_time = opal_set_rtc_time;
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ppc_md.restart = pnv_restart;
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ppc_md.power_off = pnv_power_off;
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ppc_md.halt = pnv_halt;
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ppc_md.machine_check_exception = opal_machine_check;
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}
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#ifdef CONFIG_PPC_POWERNV_RTAS
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static void __init pnv_setup_machdep_rtas(void)
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{
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if (rtas_token("get-time-of-day") != RTAS_UNKNOWN_SERVICE) {
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ppc_md.get_boot_time = rtas_get_boot_time;
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ppc_md.get_rtc_time = rtas_get_rtc_time;
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ppc_md.set_rtc_time = rtas_set_rtc_time;
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}
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ppc_md.restart = rtas_restart;
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ppc_md.power_off = rtas_power_off;
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ppc_md.halt = rtas_halt;
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}
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#endif /* CONFIG_PPC_POWERNV_RTAS */
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static int __init pnv_probe(void)
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{
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unsigned long root = of_get_flat_dt_root();
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if (!of_flat_dt_is_compatible(root, "ibm,powernv"))
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return 0;
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hpte_init_native();
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if (firmware_has_feature(FW_FEATURE_OPAL))
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pnv_setup_machdep_opal();
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#ifdef CONFIG_PPC_POWERNV_RTAS
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else if (rtas.base)
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pnv_setup_machdep_rtas();
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#endif /* CONFIG_PPC_POWERNV_RTAS */
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pr_debug("PowerNV detected !\n");
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return 1;
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}
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define_machine(powernv) {
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.name = "PowerNV",
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.probe = pnv_probe,
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.init_early = pnv_init_early,
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.setup_arch = pnv_setup_arch,
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.init_IRQ = pnv_init_IRQ,
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.show_cpuinfo = pnv_show_cpuinfo,
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.progress = pnv_progress,
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.power_save = power7_idle,
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.calibrate_decr = generic_calibrate_decr,
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#ifdef CONFIG_KEXEC
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.kexec_cpu_down = pnv_kexec_cpu_down,
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#endif
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};
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