| /* |
| * PowerNV setup code. |
| * |
| * Copyright 2011 IBM Corp. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| */ |
| |
| #undef DEBUG |
| |
| #include <linux/cpu.h> |
| #include <linux/errno.h> |
| #include <linux/sched.h> |
| #include <linux/kernel.h> |
| #include <linux/tty.h> |
| #include <linux/reboot.h> |
| #include <linux/init.h> |
| #include <linux/console.h> |
| #include <linux/delay.h> |
| #include <linux/irq.h> |
| #include <linux/seq_file.h> |
| #include <linux/of.h> |
| #include <linux/interrupt.h> |
| #include <linux/bug.h> |
| |
| #include <asm/machdep.h> |
| #include <asm/firmware.h> |
| #include <asm/xics.h> |
| #include <asm/rtas.h> |
| #include <asm/opal.h> |
| |
| #include "powernv.h" |
| |
| static void __init pnv_setup_arch(void) |
| { |
| /* Initialize SMP */ |
| pnv_smp_init(); |
| |
| /* Setup PCI */ |
| pnv_pci_init(); |
| |
| /* Setup RTC and NVRAM callbacks */ |
| if (firmware_has_feature(FW_FEATURE_OPAL)) |
| opal_nvram_init(); |
| |
| /* Enable NAP mode */ |
| powersave_nap = 1; |
| |
| /* XXX PMCS */ |
| } |
| |
| static void __init pnv_init_early(void) |
| { |
| #ifdef CONFIG_HVC_OPAL |
| if (firmware_has_feature(FW_FEATURE_OPAL)) |
| hvc_opal_init_early(); |
| else |
| #endif |
| add_preferred_console("hvc", 0, NULL); |
| } |
| |
| static void __init pnv_init_IRQ(void) |
| { |
| xics_init(); |
| |
| WARN_ON(!ppc_md.get_irq); |
| } |
| |
| static void pnv_show_cpuinfo(struct seq_file *m) |
| { |
| struct device_node *root; |
| const char *model = ""; |
| |
| root = of_find_node_by_path("/"); |
| if (root) |
| model = of_get_property(root, "model", NULL); |
| seq_printf(m, "machine\t\t: PowerNV %s\n", model); |
| if (firmware_has_feature(FW_FEATURE_OPALv3)) |
| seq_printf(m, "firmware\t: OPAL v3\n"); |
| else if (firmware_has_feature(FW_FEATURE_OPALv2)) |
| seq_printf(m, "firmware\t: OPAL v2\n"); |
| else if (firmware_has_feature(FW_FEATURE_OPAL)) |
| seq_printf(m, "firmware\t: OPAL v1\n"); |
| else |
| seq_printf(m, "firmware\t: BML\n"); |
| of_node_put(root); |
| } |
| |
| static void __noreturn pnv_restart(char *cmd) |
| { |
| long rc = OPAL_BUSY; |
| |
| while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) { |
| rc = opal_cec_reboot(); |
| if (rc == OPAL_BUSY_EVENT) |
| opal_poll_events(NULL); |
| else |
| mdelay(10); |
| } |
| for (;;) |
| opal_poll_events(NULL); |
| } |
| |
| static void __noreturn pnv_power_off(void) |
| { |
| long rc = OPAL_BUSY; |
| |
| while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) { |
| rc = opal_cec_power_down(0); |
| if (rc == OPAL_BUSY_EVENT) |
| opal_poll_events(NULL); |
| else |
| mdelay(10); |
| } |
| for (;;) |
| opal_poll_events(NULL); |
| } |
| |
| static void __noreturn pnv_halt(void) |
| { |
| pnv_power_off(); |
| } |
| |
| static void pnv_progress(char *s, unsigned short hex) |
| { |
| } |
| |
| static void pnv_shutdown(void) |
| { |
| /* Let the PCI code clear up IODA tables */ |
| pnv_pci_shutdown(); |
| |
| /* And unregister all OPAL interrupts so they don't fire |
| * up while we kexec |
| */ |
| opal_shutdown(); |
| } |
| |
| #ifdef CONFIG_KEXEC |
| static void pnv_kexec_cpu_down(int crash_shutdown, int secondary) |
| { |
| xics_kexec_teardown_cpu(secondary); |
| } |
| #endif /* CONFIG_KEXEC */ |
| |
| static void __init pnv_setup_machdep_opal(void) |
| { |
| ppc_md.get_boot_time = opal_get_boot_time; |
| ppc_md.get_rtc_time = opal_get_rtc_time; |
| ppc_md.set_rtc_time = opal_set_rtc_time; |
| ppc_md.restart = pnv_restart; |
| ppc_md.power_off = pnv_power_off; |
| ppc_md.halt = pnv_halt; |
| ppc_md.machine_check_exception = opal_machine_check; |
| } |
| |
| #ifdef CONFIG_PPC_POWERNV_RTAS |
| static void __init pnv_setup_machdep_rtas(void) |
| { |
| if (rtas_token("get-time-of-day") != RTAS_UNKNOWN_SERVICE) { |
| ppc_md.get_boot_time = rtas_get_boot_time; |
| ppc_md.get_rtc_time = rtas_get_rtc_time; |
| ppc_md.set_rtc_time = rtas_set_rtc_time; |
| } |
| ppc_md.restart = rtas_restart; |
| ppc_md.power_off = rtas_power_off; |
| ppc_md.halt = rtas_halt; |
| } |
| #endif /* CONFIG_PPC_POWERNV_RTAS */ |
| |
| static int __init pnv_probe(void) |
| { |
| unsigned long root = of_get_flat_dt_root(); |
| |
| if (!of_flat_dt_is_compatible(root, "ibm,powernv")) |
| return 0; |
| |
| hpte_init_native(); |
| |
| if (firmware_has_feature(FW_FEATURE_OPAL)) |
| pnv_setup_machdep_opal(); |
| #ifdef CONFIG_PPC_POWERNV_RTAS |
| else if (rtas.base) |
| pnv_setup_machdep_rtas(); |
| #endif /* CONFIG_PPC_POWERNV_RTAS */ |
| |
| pr_debug("PowerNV detected !\n"); |
| |
| return 1; |
| } |
| |
| define_machine(powernv) { |
| .name = "PowerNV", |
| .probe = pnv_probe, |
| .init_early = pnv_init_early, |
| .setup_arch = pnv_setup_arch, |
| .init_IRQ = pnv_init_IRQ, |
| .show_cpuinfo = pnv_show_cpuinfo, |
| .progress = pnv_progress, |
| .machine_shutdown = pnv_shutdown, |
| .power_save = power7_idle, |
| .calibrate_decr = generic_calibrate_decr, |
| #ifdef CONFIG_KEXEC |
| .kexec_cpu_down = pnv_kexec_cpu_down, |
| #endif |
| }; |