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> 2626a2056eSRob Herring #include <linux/of_fdt.h> 2755190f88SBenjamin Herrenschmidt #include <linux/interrupt.h> 2855190f88SBenjamin Herrenschmidt #include <linux/bug.h> 29cd15b048SBenjamin Herrenschmidt #include <linux/pci.h> 30fb5153d0SGautham R. Shenoy #include <linux/cpufreq.h> 3155190f88SBenjamin Herrenschmidt 3255190f88SBenjamin Herrenschmidt #include <asm/machdep.h> 3355190f88SBenjamin Herrenschmidt #include <asm/firmware.h> 3455190f88SBenjamin Herrenschmidt #include <asm/xics.h> 35243e2511SBenjamin Herrenschmidt #include <asm/xive.h> 36daea1175SBenjamin Herrenschmidt #include <asm/opal.h> 3713906db6SBenjamin Herrenschmidt #include <asm/kexec.h> 38b2a80878SShreyas B. Prabhu #include <asm/smp.h> 3954820530SMichael Ellerman #include <asm/tm.h> 4055190f88SBenjamin Herrenschmidt 4155190f88SBenjamin Herrenschmidt #include "powernv.h" 4255190f88SBenjamin Herrenschmidt 4355190f88SBenjamin Herrenschmidt static void __init pnv_setup_arch(void) 4455190f88SBenjamin Herrenschmidt { 454817fc32SAnton Blanchard set_arch_panic_timeout(10, ARCH_PANIC_TIMEOUT); 464817fc32SAnton Blanchard 4755190f88SBenjamin Herrenschmidt /* Initialize SMP */ 4855190f88SBenjamin Herrenschmidt pnv_smp_init(); 4955190f88SBenjamin Herrenschmidt 5061305a96SBenjamin Herrenschmidt /* Setup PCI */ 5161305a96SBenjamin Herrenschmidt pnv_pci_init(); 5255190f88SBenjamin Herrenschmidt 53628daa8dSBenjamin Herrenschmidt /* Setup RTC and NVRAM callbacks */ 54628daa8dSBenjamin Herrenschmidt if (firmware_has_feature(FW_FEATURE_OPAL)) 55628daa8dSBenjamin Herrenschmidt opal_nvram_init(); 5655190f88SBenjamin Herrenschmidt 5755190f88SBenjamin Herrenschmidt /* Enable NAP mode */ 5855190f88SBenjamin Herrenschmidt powersave_nap = 1; 5955190f88SBenjamin Herrenschmidt 6055190f88SBenjamin Herrenschmidt /* XXX PMCS */ 6155190f88SBenjamin Herrenschmidt } 6255190f88SBenjamin Herrenschmidt 63f2d57694SBenjamin Herrenschmidt static void __init pnv_init(void) 6455190f88SBenjamin Herrenschmidt { 653fafe9c2SBenjamin Herrenschmidt /* 663fafe9c2SBenjamin Herrenschmidt * Initialize the LPC bus now so that legacy serial 673fafe9c2SBenjamin Herrenschmidt * ports can be found on it 683fafe9c2SBenjamin Herrenschmidt */ 693fafe9c2SBenjamin Herrenschmidt opal_lpc_init(); 703fafe9c2SBenjamin Herrenschmidt 71daea1175SBenjamin Herrenschmidt #ifdef CONFIG_HVC_OPAL 72daea1175SBenjamin Herrenschmidt if (firmware_has_feature(FW_FEATURE_OPAL)) 73daea1175SBenjamin Herrenschmidt hvc_opal_init_early(); 74daea1175SBenjamin Herrenschmidt else 75daea1175SBenjamin Herrenschmidt #endif 76daea1175SBenjamin Herrenschmidt add_preferred_console("hvc", 0, NULL); 7755190f88SBenjamin Herrenschmidt } 7855190f88SBenjamin Herrenschmidt 7955190f88SBenjamin Herrenschmidt static void __init pnv_init_IRQ(void) 8055190f88SBenjamin Herrenschmidt { 81243e2511SBenjamin Herrenschmidt /* Try using a XIVE if available, otherwise use a XICS */ 82243e2511SBenjamin Herrenschmidt if (!xive_native_init()) 8355190f88SBenjamin Herrenschmidt xics_init(); 8455190f88SBenjamin Herrenschmidt 8555190f88SBenjamin Herrenschmidt WARN_ON(!ppc_md.get_irq); 8655190f88SBenjamin Herrenschmidt } 8755190f88SBenjamin Herrenschmidt 8855190f88SBenjamin Herrenschmidt static void pnv_show_cpuinfo(struct seq_file *m) 8955190f88SBenjamin Herrenschmidt { 9055190f88SBenjamin Herrenschmidt struct device_node *root; 9155190f88SBenjamin Herrenschmidt const char *model = ""; 9255190f88SBenjamin Herrenschmidt 9355190f88SBenjamin Herrenschmidt root = of_find_node_by_path("/"); 9455190f88SBenjamin Herrenschmidt if (root) 9555190f88SBenjamin Herrenschmidt model = of_get_property(root, "model", NULL); 9655190f88SBenjamin Herrenschmidt seq_printf(m, "machine\t\t: PowerNV %s\n", model); 97e4d54f71SStewart Smith if (firmware_has_feature(FW_FEATURE_OPAL)) 98e4d54f71SStewart Smith seq_printf(m, "firmware\t: OPAL\n"); 9914a43e69SBenjamin Herrenschmidt else 10014a43e69SBenjamin Herrenschmidt seq_printf(m, "firmware\t: BML\n"); 10155190f88SBenjamin Herrenschmidt of_node_put(root); 1023a4c2601SAneesh Kumar K.V if (radix_enabled()) 1033a4c2601SAneesh Kumar K.V seq_printf(m, "MMU\t\t: Radix\n"); 1043a4c2601SAneesh Kumar K.V else 1053a4c2601SAneesh Kumar K.V seq_printf(m, "MMU\t\t: Hash\n"); 10655190f88SBenjamin Herrenschmidt } 10755190f88SBenjamin Herrenschmidt 1082196c6f1SVasant Hegde static void pnv_prepare_going_down(void) 1092196c6f1SVasant Hegde { 1102196c6f1SVasant Hegde /* 1112196c6f1SVasant Hegde * Disable all notifiers from OPAL, we can't 1122196c6f1SVasant Hegde * service interrupts anymore anyway 1132196c6f1SVasant Hegde */ 11481f2f7ceSAlistair Popple opal_event_shutdown(); 1152196c6f1SVasant Hegde 1162196c6f1SVasant Hegde /* Soft disable interrupts */ 1172196c6f1SVasant Hegde local_irq_disable(); 1182196c6f1SVasant Hegde 1192196c6f1SVasant Hegde /* 1202196c6f1SVasant Hegde * Return secondary CPUs to firwmare if a flash update 1212196c6f1SVasant Hegde * is pending otherwise we will get all sort of error 1222196c6f1SVasant Hegde * messages about CPU being stuck etc.. This will also 1232196c6f1SVasant Hegde * have the side effect of hard disabling interrupts so 1242196c6f1SVasant Hegde * past this point, the kernel is effectively dead. 1252196c6f1SVasant Hegde */ 1262196c6f1SVasant Hegde opal_flash_term_callback(); 1272196c6f1SVasant Hegde } 1282196c6f1SVasant Hegde 129ec27329fSBenjamin Herrenschmidt static void __noreturn pnv_restart(char *cmd) 13055190f88SBenjamin Herrenschmidt { 131ec27329fSBenjamin Herrenschmidt long rc = OPAL_BUSY; 132ec27329fSBenjamin Herrenschmidt 1332196c6f1SVasant Hegde pnv_prepare_going_down(); 134e8e71fa4SGavin Shan 135ec27329fSBenjamin Herrenschmidt while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) { 136ec27329fSBenjamin Herrenschmidt rc = opal_cec_reboot(); 137ec27329fSBenjamin Herrenschmidt if (rc == OPAL_BUSY_EVENT) 138ec27329fSBenjamin Herrenschmidt opal_poll_events(NULL); 139ec27329fSBenjamin Herrenschmidt else 140ec27329fSBenjamin Herrenschmidt mdelay(10); 141ec27329fSBenjamin Herrenschmidt } 142ec27329fSBenjamin Herrenschmidt for (;;) 143ec27329fSBenjamin Herrenschmidt opal_poll_events(NULL); 14455190f88SBenjamin Herrenschmidt } 14555190f88SBenjamin Herrenschmidt 146ec27329fSBenjamin Herrenschmidt static void __noreturn pnv_power_off(void) 14755190f88SBenjamin Herrenschmidt { 148ec27329fSBenjamin Herrenschmidt long rc = OPAL_BUSY; 149ec27329fSBenjamin Herrenschmidt 1502196c6f1SVasant Hegde pnv_prepare_going_down(); 151e8e71fa4SGavin Shan 152ec27329fSBenjamin Herrenschmidt while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) { 153ec27329fSBenjamin Herrenschmidt rc = opal_cec_power_down(0); 154ec27329fSBenjamin Herrenschmidt if (rc == OPAL_BUSY_EVENT) 155ec27329fSBenjamin Herrenschmidt opal_poll_events(NULL); 156ec27329fSBenjamin Herrenschmidt else 157ec27329fSBenjamin Herrenschmidt mdelay(10); 158ec27329fSBenjamin Herrenschmidt } 159ec27329fSBenjamin Herrenschmidt for (;;) 160ec27329fSBenjamin Herrenschmidt opal_poll_events(NULL); 16155190f88SBenjamin Herrenschmidt } 16255190f88SBenjamin Herrenschmidt 163ec27329fSBenjamin Herrenschmidt static void __noreturn pnv_halt(void) 16455190f88SBenjamin Herrenschmidt { 165ec27329fSBenjamin Herrenschmidt pnv_power_off(); 16655190f88SBenjamin Herrenschmidt } 16755190f88SBenjamin Herrenschmidt 16855190f88SBenjamin Herrenschmidt static void pnv_progress(char *s, unsigned short hex) 16955190f88SBenjamin Herrenschmidt { 17055190f88SBenjamin Herrenschmidt } 17155190f88SBenjamin Herrenschmidt 17273ed148aSBenjamin Herrenschmidt static void pnv_shutdown(void) 17373ed148aSBenjamin Herrenschmidt { 17473ed148aSBenjamin Herrenschmidt /* Let the PCI code clear up IODA tables */ 17573ed148aSBenjamin Herrenschmidt pnv_pci_shutdown(); 17673ed148aSBenjamin Herrenschmidt 177f7d98d18SVasant Hegde /* 178f7d98d18SVasant Hegde * Stop OPAL activity: Unregister all OPAL interrupts so they 179f7d98d18SVasant Hegde * don't fire up while we kexec and make sure all potentially 180f7d98d18SVasant Hegde * DMA'ing ops are complete (such as dump retrieval). 18173ed148aSBenjamin Herrenschmidt */ 18273ed148aSBenjamin Herrenschmidt opal_shutdown(); 18373ed148aSBenjamin Herrenschmidt } 18473ed148aSBenjamin Herrenschmidt 185da665885SThiago Jung Bauermann #ifdef CONFIG_KEXEC_CORE 186298b34d7SBenjamin Herrenschmidt static void pnv_kexec_wait_secondaries_down(void) 187298b34d7SBenjamin Herrenschmidt { 188298b34d7SBenjamin Herrenschmidt int my_cpu, i, notified = -1; 189298b34d7SBenjamin Herrenschmidt 190298b34d7SBenjamin Herrenschmidt my_cpu = get_cpu(); 191298b34d7SBenjamin Herrenschmidt 192298b34d7SBenjamin Herrenschmidt for_each_online_cpu(i) { 193298b34d7SBenjamin Herrenschmidt uint8_t status; 1941b70386cSSamuel Mendoza-Jonas int64_t rc, timeout = 1000; 195298b34d7SBenjamin Herrenschmidt 196298b34d7SBenjamin Herrenschmidt if (i == my_cpu) 197298b34d7SBenjamin Herrenschmidt continue; 198298b34d7SBenjamin Herrenschmidt 199298b34d7SBenjamin Herrenschmidt for (;;) { 200298b34d7SBenjamin Herrenschmidt rc = opal_query_cpu_status(get_hard_smp_processor_id(i), 201298b34d7SBenjamin Herrenschmidt &status); 202298b34d7SBenjamin Herrenschmidt if (rc != OPAL_SUCCESS || status != OPAL_THREAD_STARTED) 203298b34d7SBenjamin Herrenschmidt break; 204298b34d7SBenjamin Herrenschmidt barrier(); 205298b34d7SBenjamin Herrenschmidt if (i != notified) { 206298b34d7SBenjamin Herrenschmidt printk(KERN_INFO "kexec: waiting for cpu %d " 207298b34d7SBenjamin Herrenschmidt "(physical %d) to enter OPAL\n", 208298b34d7SBenjamin Herrenschmidt i, paca[i].hw_cpu_id); 209298b34d7SBenjamin Herrenschmidt notified = i; 210298b34d7SBenjamin Herrenschmidt } 2111b70386cSSamuel Mendoza-Jonas 2121b70386cSSamuel Mendoza-Jonas /* 2131b70386cSSamuel Mendoza-Jonas * On crash secondaries might be unreachable or hung, 2141b70386cSSamuel Mendoza-Jonas * so timeout if we've waited too long 2151b70386cSSamuel Mendoza-Jonas * */ 2161b70386cSSamuel Mendoza-Jonas mdelay(1); 2171b70386cSSamuel Mendoza-Jonas if (timeout-- == 0) { 2181b70386cSSamuel Mendoza-Jonas printk(KERN_ERR "kexec: timed out waiting for " 2191b70386cSSamuel Mendoza-Jonas "cpu %d (physical %d) to enter OPAL\n", 2201b70386cSSamuel Mendoza-Jonas i, paca[i].hw_cpu_id); 2211b70386cSSamuel Mendoza-Jonas break; 2221b70386cSSamuel Mendoza-Jonas } 223298b34d7SBenjamin Herrenschmidt } 224298b34d7SBenjamin Herrenschmidt } 225298b34d7SBenjamin Herrenschmidt } 226298b34d7SBenjamin Herrenschmidt 22755190f88SBenjamin Herrenschmidt static void pnv_kexec_cpu_down(int crash_shutdown, int secondary) 22855190f88SBenjamin Herrenschmidt { 2291c0eaf0fSBenjamin Herrenschmidt u64 reinit_flags; 2301c0eaf0fSBenjamin Herrenschmidt 231243e2511SBenjamin Herrenschmidt if (xive_enabled()) 232243e2511SBenjamin Herrenschmidt xive_kexec_teardown_cpu(secondary); 233243e2511SBenjamin Herrenschmidt else 23455190f88SBenjamin Herrenschmidt xics_kexec_teardown_cpu(secondary); 23513906db6SBenjamin Herrenschmidt 236e4d54f71SStewart Smith /* On OPAL, we return all CPUs to firmware */ 237e4d54f71SStewart Smith if (!firmware_has_feature(FW_FEATURE_OPAL)) 238298b34d7SBenjamin Herrenschmidt return; 239298b34d7SBenjamin Herrenschmidt 240298b34d7SBenjamin Herrenschmidt if (secondary) { 24113906db6SBenjamin Herrenschmidt /* Return secondary CPUs to firmware on OPAL v3 */ 24213906db6SBenjamin Herrenschmidt mb(); 24313906db6SBenjamin Herrenschmidt get_paca()->kexec_state = KEXEC_STATE_REAL_MODE; 24413906db6SBenjamin Herrenschmidt mb(); 24513906db6SBenjamin Herrenschmidt 24613906db6SBenjamin Herrenschmidt /* Return the CPU to OPAL */ 24713906db6SBenjamin Herrenschmidt opal_return_cpu(); 248298b34d7SBenjamin Herrenschmidt } else { 249298b34d7SBenjamin Herrenschmidt /* Primary waits for the secondaries to have reached OPAL */ 250298b34d7SBenjamin Herrenschmidt pnv_kexec_wait_secondaries_down(); 251e72bb8a5SSamuel Mendoza-Jonas 252243e2511SBenjamin Herrenschmidt /* Switch XIVE back to emulation mode */ 253243e2511SBenjamin Herrenschmidt if (xive_enabled()) 254243e2511SBenjamin Herrenschmidt xive_shutdown(); 255243e2511SBenjamin Herrenschmidt 256e72bb8a5SSamuel Mendoza-Jonas /* 257e72bb8a5SSamuel Mendoza-Jonas * We might be running as little-endian - now that interrupts 258e72bb8a5SSamuel Mendoza-Jonas * are disabled, reset the HILE bit to big-endian so we don't 259e72bb8a5SSamuel Mendoza-Jonas * take interrupts in the wrong endian later 2601c0eaf0fSBenjamin Herrenschmidt * 2611c0eaf0fSBenjamin Herrenschmidt * We reinit to enable both radix and hash on P9 to ensure 2621c0eaf0fSBenjamin Herrenschmidt * the mode used by the next kernel is always supported. 263e72bb8a5SSamuel Mendoza-Jonas */ 2641c0eaf0fSBenjamin Herrenschmidt reinit_flags = OPAL_REINIT_CPUS_HILE_BE; 2651c0eaf0fSBenjamin Herrenschmidt if (cpu_has_feature(CPU_FTR_ARCH_300)) 2661c0eaf0fSBenjamin Herrenschmidt reinit_flags |= OPAL_REINIT_CPUS_MMU_RADIX | 2671c0eaf0fSBenjamin Herrenschmidt OPAL_REINIT_CPUS_MMU_HASH; 2681c0eaf0fSBenjamin Herrenschmidt opal_reinit_cpus(reinit_flags); 26913906db6SBenjamin Herrenschmidt } 27055190f88SBenjamin Herrenschmidt } 271da665885SThiago Jung Bauermann #endif /* CONFIG_KEXEC_CORE */ 27255190f88SBenjamin Herrenschmidt 2736d97d7a2SAnton Blanchard #ifdef CONFIG_MEMORY_HOTPLUG_SPARSE 2746d97d7a2SAnton Blanchard static unsigned long pnv_memory_block_size(void) 2756d97d7a2SAnton Blanchard { 2766d97d7a2SAnton Blanchard return 256UL * 1024 * 1024; 2776d97d7a2SAnton Blanchard } 2786d97d7a2SAnton Blanchard #endif 2796d97d7a2SAnton Blanchard 280628daa8dSBenjamin Herrenschmidt static void __init pnv_setup_machdep_opal(void) 281628daa8dSBenjamin Herrenschmidt { 282628daa8dSBenjamin Herrenschmidt ppc_md.get_boot_time = opal_get_boot_time; 283628daa8dSBenjamin Herrenschmidt ppc_md.restart = pnv_restart; 2849178ba29SAlexander Graf pm_power_off = pnv_power_off; 285628daa8dSBenjamin Herrenschmidt ppc_md.halt = pnv_halt; 286e36d0a2eSNicholas Piggin /* ppc_md.system_reset_exception gets filled in by pnv_smp_init() */ 287ed79ba9eSBenjamin Herrenschmidt ppc_md.machine_check_exception = opal_machine_check; 28855672ecfSMahesh Salgaonkar ppc_md.mce_check_early_recovery = opal_mce_check_early_recovery; 2890869b6fdSMahesh Salgaonkar ppc_md.hmi_exception_early = opal_hmi_exception_early; 2900869b6fdSMahesh Salgaonkar ppc_md.handle_hmi_exception = opal_handle_hmi_exception; 291628daa8dSBenjamin Herrenschmidt } 292628daa8dSBenjamin Herrenschmidt 29355190f88SBenjamin Herrenschmidt static int __init pnv_probe(void) 29455190f88SBenjamin Herrenschmidt { 295406b0b6aSBenjamin Herrenschmidt if (!of_machine_is_compatible("ibm,powernv")) 29655190f88SBenjamin Herrenschmidt return 0; 29755190f88SBenjamin Herrenschmidt 298628daa8dSBenjamin Herrenschmidt if (firmware_has_feature(FW_FEATURE_OPAL)) 299628daa8dSBenjamin Herrenschmidt pnv_setup_machdep_opal(); 300628daa8dSBenjamin Herrenschmidt 30155190f88SBenjamin Herrenschmidt pr_debug("PowerNV detected !\n"); 30255190f88SBenjamin Herrenschmidt 303f2d57694SBenjamin Herrenschmidt pnv_init(); 304f2d57694SBenjamin Herrenschmidt 30555190f88SBenjamin Herrenschmidt return 1; 30655190f88SBenjamin Herrenschmidt } 30755190f88SBenjamin Herrenschmidt 30854820530SMichael Ellerman #ifdef CONFIG_PPC_TRANSACTIONAL_MEM 30954820530SMichael Ellerman void __init pnv_tm_init(void) 31054820530SMichael Ellerman { 31154820530SMichael Ellerman if (!firmware_has_feature(FW_FEATURE_OPAL) || 31254820530SMichael Ellerman !pvr_version_is(PVR_POWER9) || 31354820530SMichael Ellerman early_cpu_has_feature(CPU_FTR_TM)) 31454820530SMichael Ellerman return; 31554820530SMichael Ellerman 31654820530SMichael Ellerman if (opal_reinit_cpus(OPAL_REINIT_CPUS_TM_SUSPEND_DISABLED) != OPAL_SUCCESS) 31754820530SMichael Ellerman return; 31854820530SMichael Ellerman 31954820530SMichael Ellerman pr_info("Enabling TM (Transactional Memory) with Suspend Disabled\n"); 32054820530SMichael Ellerman cur_cpu_spec->cpu_features |= CPU_FTR_TM; 32154820530SMichael Ellerman /* Make sure "normal" HTM is off (it should be) */ 32254820530SMichael Ellerman cur_cpu_spec->cpu_user_features2 &= ~PPC_FEATURE2_HTM; 32354820530SMichael Ellerman /* Turn on no suspend mode, and HTM no SC */ 32454820530SMichael Ellerman cur_cpu_spec->cpu_user_features2 |= PPC_FEATURE2_HTM_NO_SUSPEND | \ 32554820530SMichael Ellerman PPC_FEATURE2_HTM_NOSC; 32654820530SMichael Ellerman tm_suspend_disabled = true; 32754820530SMichael Ellerman } 32854820530SMichael Ellerman #endif /* CONFIG_PPC_TRANSACTIONAL_MEM */ 32954820530SMichael Ellerman 330fb5153d0SGautham R. Shenoy /* 331fb5153d0SGautham R. Shenoy * Returns the cpu frequency for 'cpu' in Hz. This is used by 332fb5153d0SGautham R. Shenoy * /proc/cpuinfo 333fb5153d0SGautham R. Shenoy */ 334e51df2c1SAnton Blanchard static unsigned long pnv_get_proc_freq(unsigned int cpu) 335fb5153d0SGautham R. Shenoy { 336fb5153d0SGautham R. Shenoy unsigned long ret_freq; 337fb5153d0SGautham R. Shenoy 338cd77b5ceSShriya ret_freq = cpufreq_get(cpu) * 1000ul; 339fb5153d0SGautham R. Shenoy 340fb5153d0SGautham R. Shenoy /* 341fb5153d0SGautham R. Shenoy * If the backend cpufreq driver does not exist, 342fb5153d0SGautham R. Shenoy * then fallback to old way of reporting the clockrate. 343fb5153d0SGautham R. Shenoy */ 344fb5153d0SGautham R. Shenoy if (!ret_freq) 345fb5153d0SGautham R. Shenoy ret_freq = ppc_proc_freq; 346fb5153d0SGautham R. Shenoy return ret_freq; 347fb5153d0SGautham R. Shenoy } 348fb5153d0SGautham R. Shenoy 34955190f88SBenjamin Herrenschmidt define_machine(powernv) { 35055190f88SBenjamin Herrenschmidt .name = "PowerNV", 35155190f88SBenjamin Herrenschmidt .probe = pnv_probe, 352628daa8dSBenjamin Herrenschmidt .setup_arch = pnv_setup_arch, 35355190f88SBenjamin Herrenschmidt .init_IRQ = pnv_init_IRQ, 35455190f88SBenjamin Herrenschmidt .show_cpuinfo = pnv_show_cpuinfo, 355fb5153d0SGautham R. Shenoy .get_proc_freq = pnv_get_proc_freq, 35655190f88SBenjamin Herrenschmidt .progress = pnv_progress, 35773ed148aSBenjamin Herrenschmidt .machine_shutdown = pnv_shutdown, 3585593e303SShreyas B. Prabhu .power_save = NULL, 35955190f88SBenjamin Herrenschmidt .calibrate_decr = generic_calibrate_decr, 360da665885SThiago Jung Bauermann #ifdef CONFIG_KEXEC_CORE 36155190f88SBenjamin Herrenschmidt .kexec_cpu_down = pnv_kexec_cpu_down, 36255190f88SBenjamin Herrenschmidt #endif 3636d97d7a2SAnton Blanchard #ifdef CONFIG_MEMORY_HOTPLUG_SPARSE 3646d97d7a2SAnton Blanchard .memory_block_size = pnv_memory_block_size, 3656d97d7a2SAnton Blanchard #endif 36655190f88SBenjamin Herrenschmidt }; 367