155190f88SBenjamin Herrenschmidt /* 255190f88SBenjamin Herrenschmidt * PowerNV setup code. 355190f88SBenjamin Herrenschmidt * 455190f88SBenjamin Herrenschmidt * Copyright 2011 IBM Corp. 555190f88SBenjamin Herrenschmidt * 655190f88SBenjamin Herrenschmidt * This program is free software; you can redistribute it and/or 755190f88SBenjamin Herrenschmidt * modify it under the terms of the GNU General Public License 855190f88SBenjamin Herrenschmidt * as published by the Free Software Foundation; either version 955190f88SBenjamin Herrenschmidt * 2 of the License, or (at your option) any later version. 1055190f88SBenjamin Herrenschmidt */ 1155190f88SBenjamin Herrenschmidt 1255190f88SBenjamin Herrenschmidt #undef DEBUG 1355190f88SBenjamin Herrenschmidt 1455190f88SBenjamin Herrenschmidt #include <linux/cpu.h> 1555190f88SBenjamin Herrenschmidt #include <linux/errno.h> 1655190f88SBenjamin Herrenschmidt #include <linux/sched.h> 1755190f88SBenjamin Herrenschmidt #include <linux/kernel.h> 1855190f88SBenjamin Herrenschmidt #include <linux/tty.h> 1955190f88SBenjamin Herrenschmidt #include <linux/reboot.h> 2055190f88SBenjamin Herrenschmidt #include <linux/init.h> 2155190f88SBenjamin Herrenschmidt #include <linux/console.h> 2255190f88SBenjamin Herrenschmidt #include <linux/delay.h> 2355190f88SBenjamin Herrenschmidt #include <linux/irq.h> 2455190f88SBenjamin Herrenschmidt #include <linux/seq_file.h> 2555190f88SBenjamin Herrenschmidt #include <linux/of.h> 2655190f88SBenjamin Herrenschmidt #include <linux/interrupt.h> 2755190f88SBenjamin Herrenschmidt #include <linux/bug.h> 2855190f88SBenjamin Herrenschmidt 2955190f88SBenjamin Herrenschmidt #include <asm/machdep.h> 3055190f88SBenjamin Herrenschmidt #include <asm/firmware.h> 3155190f88SBenjamin Herrenschmidt #include <asm/xics.h> 32628daa8dSBenjamin Herrenschmidt #include <asm/rtas.h> 33daea1175SBenjamin Herrenschmidt #include <asm/opal.h> 34628daa8dSBenjamin Herrenschmidt #include <asm/xics.h> 3555190f88SBenjamin Herrenschmidt 3655190f88SBenjamin Herrenschmidt #include "powernv.h" 3755190f88SBenjamin Herrenschmidt 3855190f88SBenjamin Herrenschmidt static void __init pnv_setup_arch(void) 3955190f88SBenjamin Herrenschmidt { 4055190f88SBenjamin Herrenschmidt /* Initialize SMP */ 4155190f88SBenjamin Herrenschmidt pnv_smp_init(); 4255190f88SBenjamin Herrenschmidt 4355190f88SBenjamin Herrenschmidt /* XXX PCI */ 4455190f88SBenjamin Herrenschmidt 45628daa8dSBenjamin Herrenschmidt /* Setup RTC and NVRAM callbacks */ 46628daa8dSBenjamin Herrenschmidt if (firmware_has_feature(FW_FEATURE_OPAL)) 47628daa8dSBenjamin Herrenschmidt opal_nvram_init(); 4855190f88SBenjamin Herrenschmidt 4955190f88SBenjamin Herrenschmidt /* Enable NAP mode */ 5055190f88SBenjamin Herrenschmidt powersave_nap = 1; 5155190f88SBenjamin Herrenschmidt 5255190f88SBenjamin Herrenschmidt /* XXX PMCS */ 5355190f88SBenjamin Herrenschmidt } 5455190f88SBenjamin Herrenschmidt 5555190f88SBenjamin Herrenschmidt static void __init pnv_init_early(void) 5655190f88SBenjamin Herrenschmidt { 57daea1175SBenjamin Herrenschmidt #ifdef CONFIG_HVC_OPAL 58daea1175SBenjamin Herrenschmidt if (firmware_has_feature(FW_FEATURE_OPAL)) 59daea1175SBenjamin Herrenschmidt hvc_opal_init_early(); 60daea1175SBenjamin Herrenschmidt else 61daea1175SBenjamin Herrenschmidt #endif 62daea1175SBenjamin Herrenschmidt add_preferred_console("hvc", 0, NULL); 6355190f88SBenjamin Herrenschmidt } 6455190f88SBenjamin Herrenschmidt 6555190f88SBenjamin Herrenschmidt static void __init pnv_init_IRQ(void) 6655190f88SBenjamin Herrenschmidt { 6755190f88SBenjamin Herrenschmidt xics_init(); 6855190f88SBenjamin Herrenschmidt 6955190f88SBenjamin Herrenschmidt WARN_ON(!ppc_md.get_irq); 7055190f88SBenjamin Herrenschmidt } 7155190f88SBenjamin Herrenschmidt 7255190f88SBenjamin Herrenschmidt static void pnv_show_cpuinfo(struct seq_file *m) 7355190f88SBenjamin Herrenschmidt { 7455190f88SBenjamin Herrenschmidt struct device_node *root; 7555190f88SBenjamin Herrenschmidt const char *model = ""; 7655190f88SBenjamin Herrenschmidt 7755190f88SBenjamin Herrenschmidt root = of_find_node_by_path("/"); 7855190f88SBenjamin Herrenschmidt if (root) 7955190f88SBenjamin Herrenschmidt model = of_get_property(root, "model", NULL); 8055190f88SBenjamin Herrenschmidt seq_printf(m, "machine\t\t: PowerNV %s\n", model); 8114a43e69SBenjamin Herrenschmidt if (firmware_has_feature(FW_FEATURE_OPALv2)) 8214a43e69SBenjamin Herrenschmidt seq_printf(m, "firmware\t: OPAL v2\n"); 8314a43e69SBenjamin Herrenschmidt else if (firmware_has_feature(FW_FEATURE_OPAL)) 8414a43e69SBenjamin Herrenschmidt seq_printf(m, "firmware\t: OPAL v1\n"); 8514a43e69SBenjamin Herrenschmidt else 8614a43e69SBenjamin Herrenschmidt seq_printf(m, "firmware\t: BML\n"); 8755190f88SBenjamin Herrenschmidt of_node_put(root); 8855190f88SBenjamin Herrenschmidt } 8955190f88SBenjamin Herrenschmidt 90ec27329fSBenjamin Herrenschmidt static void __noreturn pnv_restart(char *cmd) 9155190f88SBenjamin Herrenschmidt { 92ec27329fSBenjamin Herrenschmidt long rc = OPAL_BUSY; 93ec27329fSBenjamin Herrenschmidt 94ec27329fSBenjamin Herrenschmidt while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) { 95ec27329fSBenjamin Herrenschmidt rc = opal_cec_reboot(); 96ec27329fSBenjamin Herrenschmidt if (rc == OPAL_BUSY_EVENT) 97ec27329fSBenjamin Herrenschmidt opal_poll_events(NULL); 98ec27329fSBenjamin Herrenschmidt else 99ec27329fSBenjamin Herrenschmidt mdelay(10); 100ec27329fSBenjamin Herrenschmidt } 101ec27329fSBenjamin Herrenschmidt for (;;) 102ec27329fSBenjamin Herrenschmidt opal_poll_events(NULL); 10355190f88SBenjamin Herrenschmidt } 10455190f88SBenjamin Herrenschmidt 105ec27329fSBenjamin Herrenschmidt static void __noreturn pnv_power_off(void) 10655190f88SBenjamin Herrenschmidt { 107ec27329fSBenjamin Herrenschmidt long rc = OPAL_BUSY; 108ec27329fSBenjamin Herrenschmidt 109ec27329fSBenjamin Herrenschmidt while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) { 110ec27329fSBenjamin Herrenschmidt rc = opal_cec_power_down(0); 111ec27329fSBenjamin Herrenschmidt if (rc == OPAL_BUSY_EVENT) 112ec27329fSBenjamin Herrenschmidt opal_poll_events(NULL); 113ec27329fSBenjamin Herrenschmidt else 114ec27329fSBenjamin Herrenschmidt mdelay(10); 115ec27329fSBenjamin Herrenschmidt } 116ec27329fSBenjamin Herrenschmidt for (;;) 117ec27329fSBenjamin Herrenschmidt opal_poll_events(NULL); 11855190f88SBenjamin Herrenschmidt } 11955190f88SBenjamin Herrenschmidt 120ec27329fSBenjamin Herrenschmidt static void __noreturn pnv_halt(void) 12155190f88SBenjamin Herrenschmidt { 122ec27329fSBenjamin Herrenschmidt pnv_power_off(); 12355190f88SBenjamin Herrenschmidt } 12455190f88SBenjamin Herrenschmidt 12555190f88SBenjamin Herrenschmidt static void pnv_progress(char *s, unsigned short hex) 12655190f88SBenjamin Herrenschmidt { 12755190f88SBenjamin Herrenschmidt } 12855190f88SBenjamin Herrenschmidt 12955190f88SBenjamin Herrenschmidt #ifdef CONFIG_KEXEC 13055190f88SBenjamin Herrenschmidt static void pnv_kexec_cpu_down(int crash_shutdown, int secondary) 13155190f88SBenjamin Herrenschmidt { 13255190f88SBenjamin Herrenschmidt xics_kexec_teardown_cpu(secondary); 13355190f88SBenjamin Herrenschmidt } 13455190f88SBenjamin Herrenschmidt #endif /* CONFIG_KEXEC */ 13555190f88SBenjamin Herrenschmidt 136628daa8dSBenjamin Herrenschmidt static void __init pnv_setup_machdep_opal(void) 137628daa8dSBenjamin Herrenschmidt { 138628daa8dSBenjamin Herrenschmidt ppc_md.get_boot_time = opal_get_boot_time; 139628daa8dSBenjamin Herrenschmidt ppc_md.get_rtc_time = opal_get_rtc_time; 140628daa8dSBenjamin Herrenschmidt ppc_md.set_rtc_time = opal_set_rtc_time; 141628daa8dSBenjamin Herrenschmidt ppc_md.restart = pnv_restart; 142628daa8dSBenjamin Herrenschmidt ppc_md.power_off = pnv_power_off; 143628daa8dSBenjamin Herrenschmidt ppc_md.halt = pnv_halt; 144628daa8dSBenjamin Herrenschmidt } 145628daa8dSBenjamin Herrenschmidt 146628daa8dSBenjamin Herrenschmidt #ifdef CONFIG_PPC_POWERNV_RTAS 147628daa8dSBenjamin Herrenschmidt static void __init pnv_setup_machdep_rtas(void) 148628daa8dSBenjamin Herrenschmidt { 149628daa8dSBenjamin Herrenschmidt if (rtas_token("get-time-of-day") != RTAS_UNKNOWN_SERVICE) { 150628daa8dSBenjamin Herrenschmidt ppc_md.get_boot_time = rtas_get_boot_time; 151628daa8dSBenjamin Herrenschmidt ppc_md.get_rtc_time = rtas_get_rtc_time; 152628daa8dSBenjamin Herrenschmidt ppc_md.set_rtc_time = rtas_set_rtc_time; 153628daa8dSBenjamin Herrenschmidt } 154628daa8dSBenjamin Herrenschmidt ppc_md.restart = rtas_restart; 155628daa8dSBenjamin Herrenschmidt ppc_md.power_off = rtas_power_off; 156628daa8dSBenjamin Herrenschmidt ppc_md.halt = rtas_halt; 157628daa8dSBenjamin Herrenschmidt } 158628daa8dSBenjamin Herrenschmidt #endif /* CONFIG_PPC_POWERNV_RTAS */ 159628daa8dSBenjamin Herrenschmidt 16055190f88SBenjamin Herrenschmidt static int __init pnv_probe(void) 16155190f88SBenjamin Herrenschmidt { 16255190f88SBenjamin Herrenschmidt unsigned long root = of_get_flat_dt_root(); 16355190f88SBenjamin Herrenschmidt 16455190f88SBenjamin Herrenschmidt if (!of_flat_dt_is_compatible(root, "ibm,powernv")) 16555190f88SBenjamin Herrenschmidt return 0; 16655190f88SBenjamin Herrenschmidt 16755190f88SBenjamin Herrenschmidt hpte_init_native(); 16855190f88SBenjamin Herrenschmidt 169628daa8dSBenjamin Herrenschmidt if (firmware_has_feature(FW_FEATURE_OPAL)) 170628daa8dSBenjamin Herrenschmidt pnv_setup_machdep_opal(); 171628daa8dSBenjamin Herrenschmidt #ifdef CONFIG_PPC_POWERNV_RTAS 172628daa8dSBenjamin Herrenschmidt else if (rtas.base) 173628daa8dSBenjamin Herrenschmidt pnv_setup_machdep_rtas(); 174628daa8dSBenjamin Herrenschmidt #endif /* CONFIG_PPC_POWERNV_RTAS */ 175628daa8dSBenjamin Herrenschmidt 17655190f88SBenjamin Herrenschmidt pr_debug("PowerNV detected !\n"); 17755190f88SBenjamin Herrenschmidt 17855190f88SBenjamin Herrenschmidt return 1; 17955190f88SBenjamin Herrenschmidt } 18055190f88SBenjamin Herrenschmidt 18155190f88SBenjamin Herrenschmidt define_machine(powernv) { 18255190f88SBenjamin Herrenschmidt .name = "PowerNV", 18355190f88SBenjamin Herrenschmidt .probe = pnv_probe, 18455190f88SBenjamin Herrenschmidt .init_early = pnv_init_early, 185628daa8dSBenjamin Herrenschmidt .setup_arch = pnv_setup_arch, 18655190f88SBenjamin Herrenschmidt .init_IRQ = pnv_init_IRQ, 18755190f88SBenjamin Herrenschmidt .show_cpuinfo = pnv_show_cpuinfo, 18855190f88SBenjamin Herrenschmidt .progress = pnv_progress, 18955190f88SBenjamin Herrenschmidt .power_save = power7_idle, 19055190f88SBenjamin Herrenschmidt .calibrate_decr = generic_calibrate_decr, 19155190f88SBenjamin Herrenschmidt #ifdef CONFIG_KEXEC 19255190f88SBenjamin Herrenschmidt .kexec_cpu_down = pnv_kexec_cpu_down, 19355190f88SBenjamin Herrenschmidt #endif 19455190f88SBenjamin Herrenschmidt }; 195