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> 406e032b35SOliver O'Halloran #include <asm/setup.h> 4155190f88SBenjamin Herrenschmidt 4255190f88SBenjamin Herrenschmidt #include "powernv.h" 4355190f88SBenjamin Herrenschmidt 446e032b35SOliver O'Halloran static void pnv_setup_rfi_flush(void) 456e032b35SOliver O'Halloran { 466e032b35SOliver O'Halloran struct device_node *np, *fw_features; 476e032b35SOliver O'Halloran enum l1d_flush_type type; 486e032b35SOliver O'Halloran int enable; 496e032b35SOliver O'Halloran 506e032b35SOliver O'Halloran /* Default to fallback in case fw-features are not available */ 516e032b35SOliver O'Halloran type = L1D_FLUSH_FALLBACK; 526e032b35SOliver O'Halloran enable = 1; 536e032b35SOliver O'Halloran 546e032b35SOliver O'Halloran np = of_find_node_by_name(NULL, "ibm,opal"); 556e032b35SOliver O'Halloran fw_features = of_get_child_by_name(np, "fw-features"); 566e032b35SOliver O'Halloran of_node_put(np); 576e032b35SOliver O'Halloran 586e032b35SOliver O'Halloran if (fw_features) { 596e032b35SOliver O'Halloran np = of_get_child_by_name(fw_features, "inst-l1d-flush-trig2"); 606e032b35SOliver O'Halloran if (np && of_property_read_bool(np, "enabled")) 616e032b35SOliver O'Halloran type = L1D_FLUSH_MTTRIG; 626e032b35SOliver O'Halloran 636e032b35SOliver O'Halloran of_node_put(np); 646e032b35SOliver O'Halloran 656e032b35SOliver O'Halloran np = of_get_child_by_name(fw_features, "inst-l1d-flush-ori30,30,0"); 666e032b35SOliver O'Halloran if (np && of_property_read_bool(np, "enabled")) 676e032b35SOliver O'Halloran type = L1D_FLUSH_ORI; 686e032b35SOliver O'Halloran 696e032b35SOliver O'Halloran of_node_put(np); 706e032b35SOliver O'Halloran 716e032b35SOliver O'Halloran /* Enable unless firmware says NOT to */ 726e032b35SOliver O'Halloran enable = 2; 736e032b35SOliver O'Halloran np = of_get_child_by_name(fw_features, "needs-l1d-flush-msr-hv-1-to-0"); 746e032b35SOliver O'Halloran if (np && of_property_read_bool(np, "disabled")) 756e032b35SOliver O'Halloran enable--; 766e032b35SOliver O'Halloran 776e032b35SOliver O'Halloran of_node_put(np); 786e032b35SOliver O'Halloran 796e032b35SOliver O'Halloran np = of_get_child_by_name(fw_features, "needs-l1d-flush-msr-pr-0-to-1"); 806e032b35SOliver O'Halloran if (np && of_property_read_bool(np, "disabled")) 816e032b35SOliver O'Halloran enable--; 826e032b35SOliver O'Halloran 836e032b35SOliver O'Halloran of_node_put(np); 846e032b35SOliver O'Halloran of_node_put(fw_features); 856e032b35SOliver O'Halloran } 866e032b35SOliver O'Halloran 876e032b35SOliver O'Halloran setup_rfi_flush(type, enable > 0); 886e032b35SOliver O'Halloran } 896e032b35SOliver O'Halloran 9055190f88SBenjamin Herrenschmidt static void __init pnv_setup_arch(void) 9155190f88SBenjamin Herrenschmidt { 924817fc32SAnton Blanchard set_arch_panic_timeout(10, ARCH_PANIC_TIMEOUT); 934817fc32SAnton Blanchard 946e032b35SOliver O'Halloran pnv_setup_rfi_flush(); 956e032b35SOliver O'Halloran 9655190f88SBenjamin Herrenschmidt /* Initialize SMP */ 9755190f88SBenjamin Herrenschmidt pnv_smp_init(); 9855190f88SBenjamin Herrenschmidt 9961305a96SBenjamin Herrenschmidt /* Setup PCI */ 10061305a96SBenjamin Herrenschmidt pnv_pci_init(); 10155190f88SBenjamin Herrenschmidt 102628daa8dSBenjamin Herrenschmidt /* Setup RTC and NVRAM callbacks */ 103628daa8dSBenjamin Herrenschmidt if (firmware_has_feature(FW_FEATURE_OPAL)) 104628daa8dSBenjamin Herrenschmidt opal_nvram_init(); 10555190f88SBenjamin Herrenschmidt 10655190f88SBenjamin Herrenschmidt /* Enable NAP mode */ 10755190f88SBenjamin Herrenschmidt powersave_nap = 1; 10855190f88SBenjamin Herrenschmidt 10955190f88SBenjamin Herrenschmidt /* XXX PMCS */ 11055190f88SBenjamin Herrenschmidt } 11155190f88SBenjamin Herrenschmidt 112f2d57694SBenjamin Herrenschmidt static void __init pnv_init(void) 11355190f88SBenjamin Herrenschmidt { 1143fafe9c2SBenjamin Herrenschmidt /* 1153fafe9c2SBenjamin Herrenschmidt * Initialize the LPC bus now so that legacy serial 1163fafe9c2SBenjamin Herrenschmidt * ports can be found on it 1173fafe9c2SBenjamin Herrenschmidt */ 1183fafe9c2SBenjamin Herrenschmidt opal_lpc_init(); 1193fafe9c2SBenjamin Herrenschmidt 120daea1175SBenjamin Herrenschmidt #ifdef CONFIG_HVC_OPAL 121daea1175SBenjamin Herrenschmidt if (firmware_has_feature(FW_FEATURE_OPAL)) 122daea1175SBenjamin Herrenschmidt hvc_opal_init_early(); 123daea1175SBenjamin Herrenschmidt else 124daea1175SBenjamin Herrenschmidt #endif 125daea1175SBenjamin Herrenschmidt add_preferred_console("hvc", 0, NULL); 12655190f88SBenjamin Herrenschmidt } 12755190f88SBenjamin Herrenschmidt 12855190f88SBenjamin Herrenschmidt static void __init pnv_init_IRQ(void) 12955190f88SBenjamin Herrenschmidt { 130243e2511SBenjamin Herrenschmidt /* Try using a XIVE if available, otherwise use a XICS */ 131243e2511SBenjamin Herrenschmidt if (!xive_native_init()) 13255190f88SBenjamin Herrenschmidt xics_init(); 13355190f88SBenjamin Herrenschmidt 13455190f88SBenjamin Herrenschmidt WARN_ON(!ppc_md.get_irq); 13555190f88SBenjamin Herrenschmidt } 13655190f88SBenjamin Herrenschmidt 13755190f88SBenjamin Herrenschmidt static void pnv_show_cpuinfo(struct seq_file *m) 13855190f88SBenjamin Herrenschmidt { 13955190f88SBenjamin Herrenschmidt struct device_node *root; 14055190f88SBenjamin Herrenschmidt const char *model = ""; 14155190f88SBenjamin Herrenschmidt 14255190f88SBenjamin Herrenschmidt root = of_find_node_by_path("/"); 14355190f88SBenjamin Herrenschmidt if (root) 14455190f88SBenjamin Herrenschmidt model = of_get_property(root, "model", NULL); 14555190f88SBenjamin Herrenschmidt seq_printf(m, "machine\t\t: PowerNV %s\n", model); 146e4d54f71SStewart Smith if (firmware_has_feature(FW_FEATURE_OPAL)) 147e4d54f71SStewart Smith seq_printf(m, "firmware\t: OPAL\n"); 14814a43e69SBenjamin Herrenschmidt else 14914a43e69SBenjamin Herrenschmidt seq_printf(m, "firmware\t: BML\n"); 15055190f88SBenjamin Herrenschmidt of_node_put(root); 1513a4c2601SAneesh Kumar K.V if (radix_enabled()) 1523a4c2601SAneesh Kumar K.V seq_printf(m, "MMU\t\t: Radix\n"); 1533a4c2601SAneesh Kumar K.V else 1543a4c2601SAneesh Kumar K.V seq_printf(m, "MMU\t\t: Hash\n"); 15555190f88SBenjamin Herrenschmidt } 15655190f88SBenjamin Herrenschmidt 1572196c6f1SVasant Hegde static void pnv_prepare_going_down(void) 1582196c6f1SVasant Hegde { 1592196c6f1SVasant Hegde /* 1602196c6f1SVasant Hegde * Disable all notifiers from OPAL, we can't 1612196c6f1SVasant Hegde * service interrupts anymore anyway 1622196c6f1SVasant Hegde */ 16381f2f7ceSAlistair Popple opal_event_shutdown(); 1642196c6f1SVasant Hegde 1652196c6f1SVasant Hegde /* Soft disable interrupts */ 1662196c6f1SVasant Hegde local_irq_disable(); 1672196c6f1SVasant Hegde 1682196c6f1SVasant Hegde /* 1692196c6f1SVasant Hegde * Return secondary CPUs to firwmare if a flash update 1702196c6f1SVasant Hegde * is pending otherwise we will get all sort of error 1712196c6f1SVasant Hegde * messages about CPU being stuck etc.. This will also 1722196c6f1SVasant Hegde * have the side effect of hard disabling interrupts so 1732196c6f1SVasant Hegde * past this point, the kernel is effectively dead. 1742196c6f1SVasant Hegde */ 1752196c6f1SVasant Hegde opal_flash_term_callback(); 1762196c6f1SVasant Hegde } 1772196c6f1SVasant Hegde 178ec27329fSBenjamin Herrenschmidt static void __noreturn pnv_restart(char *cmd) 17955190f88SBenjamin Herrenschmidt { 180ec27329fSBenjamin Herrenschmidt long rc = OPAL_BUSY; 181ec27329fSBenjamin Herrenschmidt 1822196c6f1SVasant Hegde pnv_prepare_going_down(); 183e8e71fa4SGavin Shan 184ec27329fSBenjamin Herrenschmidt while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) { 185ec27329fSBenjamin Herrenschmidt rc = opal_cec_reboot(); 186ec27329fSBenjamin Herrenschmidt if (rc == OPAL_BUSY_EVENT) 187ec27329fSBenjamin Herrenschmidt opal_poll_events(NULL); 188ec27329fSBenjamin Herrenschmidt else 189ec27329fSBenjamin Herrenschmidt mdelay(10); 190ec27329fSBenjamin Herrenschmidt } 191ec27329fSBenjamin Herrenschmidt for (;;) 192ec27329fSBenjamin Herrenschmidt opal_poll_events(NULL); 19355190f88SBenjamin Herrenschmidt } 19455190f88SBenjamin Herrenschmidt 195ec27329fSBenjamin Herrenschmidt static void __noreturn pnv_power_off(void) 19655190f88SBenjamin Herrenschmidt { 197ec27329fSBenjamin Herrenschmidt long rc = OPAL_BUSY; 198ec27329fSBenjamin Herrenschmidt 1992196c6f1SVasant Hegde pnv_prepare_going_down(); 200e8e71fa4SGavin Shan 201ec27329fSBenjamin Herrenschmidt while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) { 202ec27329fSBenjamin Herrenschmidt rc = opal_cec_power_down(0); 203ec27329fSBenjamin Herrenschmidt if (rc == OPAL_BUSY_EVENT) 204ec27329fSBenjamin Herrenschmidt opal_poll_events(NULL); 205ec27329fSBenjamin Herrenschmidt else 206ec27329fSBenjamin Herrenschmidt mdelay(10); 207ec27329fSBenjamin Herrenschmidt } 208ec27329fSBenjamin Herrenschmidt for (;;) 209ec27329fSBenjamin Herrenschmidt opal_poll_events(NULL); 21055190f88SBenjamin Herrenschmidt } 21155190f88SBenjamin Herrenschmidt 212ec27329fSBenjamin Herrenschmidt static void __noreturn pnv_halt(void) 21355190f88SBenjamin Herrenschmidt { 214ec27329fSBenjamin Herrenschmidt pnv_power_off(); 21555190f88SBenjamin Herrenschmidt } 21655190f88SBenjamin Herrenschmidt 21755190f88SBenjamin Herrenschmidt static void pnv_progress(char *s, unsigned short hex) 21855190f88SBenjamin Herrenschmidt { 21955190f88SBenjamin Herrenschmidt } 22055190f88SBenjamin Herrenschmidt 22173ed148aSBenjamin Herrenschmidt static void pnv_shutdown(void) 22273ed148aSBenjamin Herrenschmidt { 22373ed148aSBenjamin Herrenschmidt /* Let the PCI code clear up IODA tables */ 22473ed148aSBenjamin Herrenschmidt pnv_pci_shutdown(); 22573ed148aSBenjamin Herrenschmidt 226f7d98d18SVasant Hegde /* 227f7d98d18SVasant Hegde * Stop OPAL activity: Unregister all OPAL interrupts so they 228f7d98d18SVasant Hegde * don't fire up while we kexec and make sure all potentially 229f7d98d18SVasant Hegde * DMA'ing ops are complete (such as dump retrieval). 23073ed148aSBenjamin Herrenschmidt */ 23173ed148aSBenjamin Herrenschmidt opal_shutdown(); 23273ed148aSBenjamin Herrenschmidt } 23373ed148aSBenjamin Herrenschmidt 234da665885SThiago Jung Bauermann #ifdef CONFIG_KEXEC_CORE 235298b34d7SBenjamin Herrenschmidt static void pnv_kexec_wait_secondaries_down(void) 236298b34d7SBenjamin Herrenschmidt { 237298b34d7SBenjamin Herrenschmidt int my_cpu, i, notified = -1; 238298b34d7SBenjamin Herrenschmidt 239298b34d7SBenjamin Herrenschmidt my_cpu = get_cpu(); 240298b34d7SBenjamin Herrenschmidt 241298b34d7SBenjamin Herrenschmidt for_each_online_cpu(i) { 242298b34d7SBenjamin Herrenschmidt uint8_t status; 2431b70386cSSamuel Mendoza-Jonas int64_t rc, timeout = 1000; 244298b34d7SBenjamin Herrenschmidt 245298b34d7SBenjamin Herrenschmidt if (i == my_cpu) 246298b34d7SBenjamin Herrenschmidt continue; 247298b34d7SBenjamin Herrenschmidt 248298b34d7SBenjamin Herrenschmidt for (;;) { 249298b34d7SBenjamin Herrenschmidt rc = opal_query_cpu_status(get_hard_smp_processor_id(i), 250298b34d7SBenjamin Herrenschmidt &status); 251298b34d7SBenjamin Herrenschmidt if (rc != OPAL_SUCCESS || status != OPAL_THREAD_STARTED) 252298b34d7SBenjamin Herrenschmidt break; 253298b34d7SBenjamin Herrenschmidt barrier(); 254298b34d7SBenjamin Herrenschmidt if (i != notified) { 255298b34d7SBenjamin Herrenschmidt printk(KERN_INFO "kexec: waiting for cpu %d " 256298b34d7SBenjamin Herrenschmidt "(physical %d) to enter OPAL\n", 257298b34d7SBenjamin Herrenschmidt i, paca[i].hw_cpu_id); 258298b34d7SBenjamin Herrenschmidt notified = i; 259298b34d7SBenjamin Herrenschmidt } 2601b70386cSSamuel Mendoza-Jonas 2611b70386cSSamuel Mendoza-Jonas /* 2621b70386cSSamuel Mendoza-Jonas * On crash secondaries might be unreachable or hung, 2631b70386cSSamuel Mendoza-Jonas * so timeout if we've waited too long 2641b70386cSSamuel Mendoza-Jonas * */ 2651b70386cSSamuel Mendoza-Jonas mdelay(1); 2661b70386cSSamuel Mendoza-Jonas if (timeout-- == 0) { 2671b70386cSSamuel Mendoza-Jonas printk(KERN_ERR "kexec: timed out waiting for " 2681b70386cSSamuel Mendoza-Jonas "cpu %d (physical %d) to enter OPAL\n", 2691b70386cSSamuel Mendoza-Jonas i, paca[i].hw_cpu_id); 2701b70386cSSamuel Mendoza-Jonas break; 2711b70386cSSamuel Mendoza-Jonas } 272298b34d7SBenjamin Herrenschmidt } 273298b34d7SBenjamin Herrenschmidt } 274298b34d7SBenjamin Herrenschmidt } 275298b34d7SBenjamin Herrenschmidt 27655190f88SBenjamin Herrenschmidt static void pnv_kexec_cpu_down(int crash_shutdown, int secondary) 27755190f88SBenjamin Herrenschmidt { 2781c0eaf0fSBenjamin Herrenschmidt u64 reinit_flags; 2791c0eaf0fSBenjamin Herrenschmidt 280243e2511SBenjamin Herrenschmidt if (xive_enabled()) 281243e2511SBenjamin Herrenschmidt xive_kexec_teardown_cpu(secondary); 282243e2511SBenjamin Herrenschmidt else 28355190f88SBenjamin Herrenschmidt xics_kexec_teardown_cpu(secondary); 28413906db6SBenjamin Herrenschmidt 285e4d54f71SStewart Smith /* On OPAL, we return all CPUs to firmware */ 286e4d54f71SStewart Smith if (!firmware_has_feature(FW_FEATURE_OPAL)) 287298b34d7SBenjamin Herrenschmidt return; 288298b34d7SBenjamin Herrenschmidt 289298b34d7SBenjamin Herrenschmidt if (secondary) { 29013906db6SBenjamin Herrenschmidt /* Return secondary CPUs to firmware on OPAL v3 */ 29113906db6SBenjamin Herrenschmidt mb(); 29213906db6SBenjamin Herrenschmidt get_paca()->kexec_state = KEXEC_STATE_REAL_MODE; 29313906db6SBenjamin Herrenschmidt mb(); 29413906db6SBenjamin Herrenschmidt 29513906db6SBenjamin Herrenschmidt /* Return the CPU to OPAL */ 29613906db6SBenjamin Herrenschmidt opal_return_cpu(); 297298b34d7SBenjamin Herrenschmidt } else { 298298b34d7SBenjamin Herrenschmidt /* Primary waits for the secondaries to have reached OPAL */ 299298b34d7SBenjamin Herrenschmidt pnv_kexec_wait_secondaries_down(); 300e72bb8a5SSamuel Mendoza-Jonas 301243e2511SBenjamin Herrenschmidt /* Switch XIVE back to emulation mode */ 302243e2511SBenjamin Herrenschmidt if (xive_enabled()) 303243e2511SBenjamin Herrenschmidt xive_shutdown(); 304243e2511SBenjamin Herrenschmidt 305e72bb8a5SSamuel Mendoza-Jonas /* 306e72bb8a5SSamuel Mendoza-Jonas * We might be running as little-endian - now that interrupts 307e72bb8a5SSamuel Mendoza-Jonas * are disabled, reset the HILE bit to big-endian so we don't 308e72bb8a5SSamuel Mendoza-Jonas * take interrupts in the wrong endian later 3091c0eaf0fSBenjamin Herrenschmidt * 3101c0eaf0fSBenjamin Herrenschmidt * We reinit to enable both radix and hash on P9 to ensure 3111c0eaf0fSBenjamin Herrenschmidt * the mode used by the next kernel is always supported. 312e72bb8a5SSamuel Mendoza-Jonas */ 3131c0eaf0fSBenjamin Herrenschmidt reinit_flags = OPAL_REINIT_CPUS_HILE_BE; 3141c0eaf0fSBenjamin Herrenschmidt if (cpu_has_feature(CPU_FTR_ARCH_300)) 3151c0eaf0fSBenjamin Herrenschmidt reinit_flags |= OPAL_REINIT_CPUS_MMU_RADIX | 3161c0eaf0fSBenjamin Herrenschmidt OPAL_REINIT_CPUS_MMU_HASH; 3171c0eaf0fSBenjamin Herrenschmidt opal_reinit_cpus(reinit_flags); 31813906db6SBenjamin Herrenschmidt } 31955190f88SBenjamin Herrenschmidt } 320da665885SThiago Jung Bauermann #endif /* CONFIG_KEXEC_CORE */ 32155190f88SBenjamin Herrenschmidt 3226d97d7a2SAnton Blanchard #ifdef CONFIG_MEMORY_HOTPLUG_SPARSE 3236d97d7a2SAnton Blanchard static unsigned long pnv_memory_block_size(void) 3246d97d7a2SAnton Blanchard { 32553ecde0bSAnton Blanchard /* 32653ecde0bSAnton Blanchard * We map the kernel linear region with 1GB large pages on radix. For 32753ecde0bSAnton Blanchard * memory hot unplug to work our memory block size must be at least 32853ecde0bSAnton Blanchard * this size. 32953ecde0bSAnton Blanchard */ 33053ecde0bSAnton Blanchard if (radix_enabled()) 33153ecde0bSAnton Blanchard return 1UL * 1024 * 1024 * 1024; 33253ecde0bSAnton Blanchard else 3336d97d7a2SAnton Blanchard return 256UL * 1024 * 1024; 3346d97d7a2SAnton Blanchard } 3356d97d7a2SAnton Blanchard #endif 3366d97d7a2SAnton Blanchard 337628daa8dSBenjamin Herrenschmidt static void __init pnv_setup_machdep_opal(void) 338628daa8dSBenjamin Herrenschmidt { 339628daa8dSBenjamin Herrenschmidt ppc_md.get_boot_time = opal_get_boot_time; 340628daa8dSBenjamin Herrenschmidt ppc_md.restart = pnv_restart; 3419178ba29SAlexander Graf pm_power_off = pnv_power_off; 342628daa8dSBenjamin Herrenschmidt ppc_md.halt = pnv_halt; 343e36d0a2eSNicholas Piggin /* ppc_md.system_reset_exception gets filled in by pnv_smp_init() */ 344ed79ba9eSBenjamin Herrenschmidt ppc_md.machine_check_exception = opal_machine_check; 34555672ecfSMahesh Salgaonkar ppc_md.mce_check_early_recovery = opal_mce_check_early_recovery; 3460869b6fdSMahesh Salgaonkar ppc_md.hmi_exception_early = opal_hmi_exception_early; 3470869b6fdSMahesh Salgaonkar ppc_md.handle_hmi_exception = opal_handle_hmi_exception; 348628daa8dSBenjamin Herrenschmidt } 349628daa8dSBenjamin Herrenschmidt 35055190f88SBenjamin Herrenschmidt static int __init pnv_probe(void) 35155190f88SBenjamin Herrenschmidt { 352406b0b6aSBenjamin Herrenschmidt if (!of_machine_is_compatible("ibm,powernv")) 35355190f88SBenjamin Herrenschmidt return 0; 35455190f88SBenjamin Herrenschmidt 355628daa8dSBenjamin Herrenschmidt if (firmware_has_feature(FW_FEATURE_OPAL)) 356628daa8dSBenjamin Herrenschmidt pnv_setup_machdep_opal(); 357628daa8dSBenjamin Herrenschmidt 35855190f88SBenjamin Herrenschmidt pr_debug("PowerNV detected !\n"); 35955190f88SBenjamin Herrenschmidt 360f2d57694SBenjamin Herrenschmidt pnv_init(); 361f2d57694SBenjamin Herrenschmidt 36255190f88SBenjamin Herrenschmidt return 1; 36355190f88SBenjamin Herrenschmidt } 36455190f88SBenjamin Herrenschmidt 36554820530SMichael Ellerman #ifdef CONFIG_PPC_TRANSACTIONAL_MEM 36654820530SMichael Ellerman void __init pnv_tm_init(void) 36754820530SMichael Ellerman { 36854820530SMichael Ellerman if (!firmware_has_feature(FW_FEATURE_OPAL) || 36954820530SMichael Ellerman !pvr_version_is(PVR_POWER9) || 37054820530SMichael Ellerman early_cpu_has_feature(CPU_FTR_TM)) 37154820530SMichael Ellerman return; 37254820530SMichael Ellerman 37354820530SMichael Ellerman if (opal_reinit_cpus(OPAL_REINIT_CPUS_TM_SUSPEND_DISABLED) != OPAL_SUCCESS) 37454820530SMichael Ellerman return; 37554820530SMichael Ellerman 37654820530SMichael Ellerman pr_info("Enabling TM (Transactional Memory) with Suspend Disabled\n"); 37754820530SMichael Ellerman cur_cpu_spec->cpu_features |= CPU_FTR_TM; 37854820530SMichael Ellerman /* Make sure "normal" HTM is off (it should be) */ 37954820530SMichael Ellerman cur_cpu_spec->cpu_user_features2 &= ~PPC_FEATURE2_HTM; 38054820530SMichael Ellerman /* Turn on no suspend mode, and HTM no SC */ 38154820530SMichael Ellerman cur_cpu_spec->cpu_user_features2 |= PPC_FEATURE2_HTM_NO_SUSPEND | \ 38254820530SMichael Ellerman PPC_FEATURE2_HTM_NOSC; 38354820530SMichael Ellerman tm_suspend_disabled = true; 38454820530SMichael Ellerman } 38554820530SMichael Ellerman #endif /* CONFIG_PPC_TRANSACTIONAL_MEM */ 38654820530SMichael Ellerman 387fb5153d0SGautham R. Shenoy /* 388fb5153d0SGautham R. Shenoy * Returns the cpu frequency for 'cpu' in Hz. This is used by 389fb5153d0SGautham R. Shenoy * /proc/cpuinfo 390fb5153d0SGautham R. Shenoy */ 391e51df2c1SAnton Blanchard static unsigned long pnv_get_proc_freq(unsigned int cpu) 392fb5153d0SGautham R. Shenoy { 393fb5153d0SGautham R. Shenoy unsigned long ret_freq; 394fb5153d0SGautham R. Shenoy 395cd77b5ceSShriya ret_freq = cpufreq_get(cpu) * 1000ul; 396fb5153d0SGautham R. Shenoy 397fb5153d0SGautham R. Shenoy /* 398fb5153d0SGautham R. Shenoy * If the backend cpufreq driver does not exist, 399fb5153d0SGautham R. Shenoy * then fallback to old way of reporting the clockrate. 400fb5153d0SGautham R. Shenoy */ 401fb5153d0SGautham R. Shenoy if (!ret_freq) 402fb5153d0SGautham R. Shenoy ret_freq = ppc_proc_freq; 403fb5153d0SGautham R. Shenoy return ret_freq; 404fb5153d0SGautham R. Shenoy } 405fb5153d0SGautham R. Shenoy 40655190f88SBenjamin Herrenschmidt define_machine(powernv) { 40755190f88SBenjamin Herrenschmidt .name = "PowerNV", 40855190f88SBenjamin Herrenschmidt .probe = pnv_probe, 409628daa8dSBenjamin Herrenschmidt .setup_arch = pnv_setup_arch, 41055190f88SBenjamin Herrenschmidt .init_IRQ = pnv_init_IRQ, 41155190f88SBenjamin Herrenschmidt .show_cpuinfo = pnv_show_cpuinfo, 412fb5153d0SGautham R. Shenoy .get_proc_freq = pnv_get_proc_freq, 41355190f88SBenjamin Herrenschmidt .progress = pnv_progress, 41473ed148aSBenjamin Herrenschmidt .machine_shutdown = pnv_shutdown, 4155593e303SShreyas B. Prabhu .power_save = NULL, 41655190f88SBenjamin Herrenschmidt .calibrate_decr = generic_calibrate_decr, 417da665885SThiago Jung Bauermann #ifdef CONFIG_KEXEC_CORE 41855190f88SBenjamin Herrenschmidt .kexec_cpu_down = pnv_kexec_cpu_down, 41955190f88SBenjamin Herrenschmidt #endif 4206d97d7a2SAnton Blanchard #ifdef CONFIG_MEMORY_HOTPLUG_SPARSE 4216d97d7a2SAnton Blanchard .memory_block_size = pnv_memory_block_size, 4226d97d7a2SAnton Blanchard #endif 42355190f88SBenjamin Herrenschmidt }; 424