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/*
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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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