1*b2441318SGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0 21da177e4SLinus Torvalds /* 31da177e4SLinus Torvalds * Alpha specific irq code. 41da177e4SLinus Torvalds */ 51da177e4SLinus Torvalds 61da177e4SLinus Torvalds #include <linux/init.h> 71da177e4SLinus Torvalds #include <linux/sched.h> 81da177e4SLinus Torvalds #include <linux/irq.h> 91da177e4SLinus Torvalds #include <linux/kernel_stat.h> 10cff52dafSAl Viro #include <linux/module.h> 111da177e4SLinus Torvalds 121da177e4SLinus Torvalds #include <asm/machvec.h> 131da177e4SLinus Torvalds #include <asm/dma.h> 14979f8671SMichael Cree #include <asm/perf_event.h> 15ec221208SDavid Howells #include <asm/mce.h> 161da177e4SLinus Torvalds 171da177e4SLinus Torvalds #include "proto.h" 181da177e4SLinus Torvalds #include "irq_impl.h" 191da177e4SLinus Torvalds 201da177e4SLinus Torvalds /* Hack minimum IPL during interrupt processing for broken hardware. */ 211da177e4SLinus Torvalds #ifdef CONFIG_ALPHA_BROKEN_IRQ_MASK 221da177e4SLinus Torvalds int __min_ipl; 23cff52dafSAl Viro EXPORT_SYMBOL(__min_ipl); 241da177e4SLinus Torvalds #endif 251da177e4SLinus Torvalds 261da177e4SLinus Torvalds /* 271da177e4SLinus Torvalds * Performance counter hook. A module can override this to 281da177e4SLinus Torvalds * do something useful. 291da177e4SLinus Torvalds */ 301da177e4SLinus Torvalds static void 311da177e4SLinus Torvalds dummy_perf(unsigned long vector, struct pt_regs *regs) 321da177e4SLinus Torvalds { 331da177e4SLinus Torvalds irq_err_count++; 341da177e4SLinus Torvalds printk(KERN_CRIT "Performance counter interrupt!\n"); 351da177e4SLinus Torvalds } 361da177e4SLinus Torvalds 371da177e4SLinus Torvalds void (*perf_irq)(unsigned long, struct pt_regs *) = dummy_perf; 38cff52dafSAl Viro EXPORT_SYMBOL(perf_irq); 391da177e4SLinus Torvalds 401da177e4SLinus Torvalds /* 411da177e4SLinus Torvalds * The main interrupt entry point. 421da177e4SLinus Torvalds */ 431da177e4SLinus Torvalds 441da177e4SLinus Torvalds asmlinkage void 451da177e4SLinus Torvalds do_entInt(unsigned long type, unsigned long vector, 461da177e4SLinus Torvalds unsigned long la_ptr, struct pt_regs *regs) 471da177e4SLinus Torvalds { 487ca56053SAl Viro struct pt_regs *old_regs; 49e20800fdSWill Deacon 50e20800fdSWill Deacon /* 51e20800fdSWill Deacon * Disable interrupts during IRQ handling. 52e20800fdSWill Deacon * Note that there is no matching local_irq_enable() due to 53e20800fdSWill Deacon * severe problems with RTI at IPL0 and some MILO PALcode 54e20800fdSWill Deacon * (namely LX164). 55e20800fdSWill Deacon */ 56e20800fdSWill Deacon local_irq_disable(); 571da177e4SLinus Torvalds switch (type) { 581da177e4SLinus Torvalds case 0: 591da177e4SLinus Torvalds #ifdef CONFIG_SMP 601da177e4SLinus Torvalds handle_ipi(regs); 611da177e4SLinus Torvalds return; 621da177e4SLinus Torvalds #else 631da177e4SLinus Torvalds irq_err_count++; 641da177e4SLinus Torvalds printk(KERN_CRIT "Interprocessor interrupt? " 651da177e4SLinus Torvalds "You must be kidding!\n"); 661da177e4SLinus Torvalds #endif 671da177e4SLinus Torvalds break; 681da177e4SLinus Torvalds case 1: 693dbb8c62SAl Viro old_regs = set_irq_regs(regs); 703dbb8c62SAl Viro handle_irq(RTC_IRQ); 713dbb8c62SAl Viro set_irq_regs(old_regs); 721da177e4SLinus Torvalds return; 731da177e4SLinus Torvalds case 2: 744fa1970aSAl Viro old_regs = set_irq_regs(regs); 754fa1970aSAl Viro alpha_mv.machine_check(vector, la_ptr); 764fa1970aSAl Viro set_irq_regs(old_regs); 771da177e4SLinus Torvalds return; 781da177e4SLinus Torvalds case 3: 797ca56053SAl Viro old_regs = set_irq_regs(regs); 807ca56053SAl Viro alpha_mv.device_interrupt(vector); 817ca56053SAl Viro set_irq_regs(old_regs); 821da177e4SLinus Torvalds return; 831da177e4SLinus Torvalds case 4: 841da177e4SLinus Torvalds perf_irq(la_ptr, regs); 851da177e4SLinus Torvalds return; 861da177e4SLinus Torvalds default: 871da177e4SLinus Torvalds printk(KERN_CRIT "Hardware intr %ld %lx? Huh?\n", 881da177e4SLinus Torvalds type, vector); 891da177e4SLinus Torvalds } 901da177e4SLinus Torvalds printk(KERN_CRIT "PC = %016lx PS=%04lx\n", regs->pc, regs->ps); 911da177e4SLinus Torvalds } 921da177e4SLinus Torvalds 931da177e4SLinus Torvalds void __init 941da177e4SLinus Torvalds common_init_isa_dma(void) 951da177e4SLinus Torvalds { 961da177e4SLinus Torvalds outb(0, DMA1_RESET_REG); 971da177e4SLinus Torvalds outb(0, DMA2_RESET_REG); 981da177e4SLinus Torvalds outb(0, DMA1_CLR_MASK_REG); 991da177e4SLinus Torvalds outb(0, DMA2_CLR_MASK_REG); 1001da177e4SLinus Torvalds } 1011da177e4SLinus Torvalds 1021da177e4SLinus Torvalds void __init 1031da177e4SLinus Torvalds init_IRQ(void) 1041da177e4SLinus Torvalds { 1051da177e4SLinus Torvalds /* Just in case the platform init_irq() causes interrupts/mchecks 1061da177e4SLinus Torvalds (as is the case with RAWHIDE, at least). */ 1071da177e4SLinus Torvalds wrent(entInt, 0); 1081da177e4SLinus Torvalds 1091da177e4SLinus Torvalds alpha_mv.init_irq(); 1101da177e4SLinus Torvalds } 1111da177e4SLinus Torvalds 1121da177e4SLinus Torvalds /* 1131da177e4SLinus Torvalds * machine error checks 1141da177e4SLinus Torvalds */ 1151da177e4SLinus Torvalds #define MCHK_K_TPERR 0x0080 1161da177e4SLinus Torvalds #define MCHK_K_TCPERR 0x0082 1171da177e4SLinus Torvalds #define MCHK_K_HERR 0x0084 1181da177e4SLinus Torvalds #define MCHK_K_ECC_C 0x0086 1191da177e4SLinus Torvalds #define MCHK_K_ECC_NC 0x0088 1201da177e4SLinus Torvalds #define MCHK_K_OS_BUGCHECK 0x008A 1211da177e4SLinus Torvalds #define MCHK_K_PAL_BUGCHECK 0x0090 1221da177e4SLinus Torvalds 1231da177e4SLinus Torvalds #ifndef CONFIG_SMP 1241da177e4SLinus Torvalds struct mcheck_info __mcheck_info; 1251da177e4SLinus Torvalds #endif 1261da177e4SLinus Torvalds 1271da177e4SLinus Torvalds void 1281da177e4SLinus Torvalds process_mcheck_info(unsigned long vector, unsigned long la_ptr, 1294fa1970aSAl Viro const char *machine, int expected) 1301da177e4SLinus Torvalds { 1311da177e4SLinus Torvalds struct el_common *mchk_header; 1321da177e4SLinus Torvalds const char *reason; 1331da177e4SLinus Torvalds 1341da177e4SLinus Torvalds /* 1351da177e4SLinus Torvalds * See if the machine check is due to a badaddr() and if so, 1361da177e4SLinus Torvalds * ignore it. 1371da177e4SLinus Torvalds */ 1381da177e4SLinus Torvalds 1391da177e4SLinus Torvalds #ifdef CONFIG_VERBOSE_MCHECK 1401da177e4SLinus Torvalds if (alpha_verbose_mcheck > 1) { 1411da177e4SLinus Torvalds printk(KERN_CRIT "%s machine check %s\n", machine, 1421da177e4SLinus Torvalds expected ? "expected." : "NOT expected!!!"); 1431da177e4SLinus Torvalds } 1441da177e4SLinus Torvalds #endif 1451da177e4SLinus Torvalds 1461da177e4SLinus Torvalds if (expected) { 1471da177e4SLinus Torvalds int cpu = smp_processor_id(); 1481da177e4SLinus Torvalds mcheck_expected(cpu) = 0; 1491da177e4SLinus Torvalds mcheck_taken(cpu) = 1; 1501da177e4SLinus Torvalds return; 1511da177e4SLinus Torvalds } 1521da177e4SLinus Torvalds 1531da177e4SLinus Torvalds mchk_header = (struct el_common *)la_ptr; 1541da177e4SLinus Torvalds 1551da177e4SLinus Torvalds printk(KERN_CRIT "%s machine check: vector=0x%lx pc=0x%lx code=0x%x\n", 1564fa1970aSAl Viro machine, vector, get_irq_regs()->pc, mchk_header->code); 1571da177e4SLinus Torvalds 1581da177e4SLinus Torvalds switch (mchk_header->code) { 1591da177e4SLinus Torvalds /* Machine check reasons. Defined according to PALcode sources. */ 1601da177e4SLinus Torvalds case 0x80: reason = "tag parity error"; break; 1611da177e4SLinus Torvalds case 0x82: reason = "tag control parity error"; break; 1621da177e4SLinus Torvalds case 0x84: reason = "generic hard error"; break; 1631da177e4SLinus Torvalds case 0x86: reason = "correctable ECC error"; break; 1641da177e4SLinus Torvalds case 0x88: reason = "uncorrectable ECC error"; break; 1651da177e4SLinus Torvalds case 0x8A: reason = "OS-specific PAL bugcheck"; break; 1661da177e4SLinus Torvalds case 0x90: reason = "callsys in kernel mode"; break; 1671da177e4SLinus Torvalds case 0x96: reason = "i-cache read retryable error"; break; 1681da177e4SLinus Torvalds case 0x98: reason = "processor detected hard error"; break; 1691da177e4SLinus Torvalds 1701da177e4SLinus Torvalds /* System specific (these are for Alcor, at least): */ 1711da177e4SLinus Torvalds case 0x202: reason = "system detected hard error"; break; 1721da177e4SLinus Torvalds case 0x203: reason = "system detected uncorrectable ECC error"; break; 1731da177e4SLinus Torvalds case 0x204: reason = "SIO SERR occurred on PCI bus"; break; 1741da177e4SLinus Torvalds case 0x205: reason = "parity error detected by core logic"; break; 1751da177e4SLinus Torvalds case 0x206: reason = "SIO IOCHK occurred on ISA bus"; break; 1761da177e4SLinus Torvalds case 0x207: reason = "non-existent memory error"; break; 1771da177e4SLinus Torvalds case 0x208: reason = "MCHK_K_DCSR"; break; 1781da177e4SLinus Torvalds case 0x209: reason = "PCI SERR detected"; break; 1791da177e4SLinus Torvalds case 0x20b: reason = "PCI data parity error detected"; break; 1801da177e4SLinus Torvalds case 0x20d: reason = "PCI address parity error detected"; break; 1811da177e4SLinus Torvalds case 0x20f: reason = "PCI master abort error"; break; 1821da177e4SLinus Torvalds case 0x211: reason = "PCI target abort error"; break; 1831da177e4SLinus Torvalds case 0x213: reason = "scatter/gather PTE invalid error"; break; 1841da177e4SLinus Torvalds case 0x215: reason = "flash ROM write error"; break; 1851da177e4SLinus Torvalds case 0x217: reason = "IOA timeout detected"; break; 1861da177e4SLinus Torvalds case 0x219: reason = "IOCHK#, EISA add-in board parity or other catastrophic error"; break; 1871da177e4SLinus Torvalds case 0x21b: reason = "EISA fail-safe timer timeout"; break; 1881da177e4SLinus Torvalds case 0x21d: reason = "EISA bus time-out"; break; 1891da177e4SLinus Torvalds case 0x21f: reason = "EISA software generated NMI"; break; 1901da177e4SLinus Torvalds case 0x221: reason = "unexpected ev5 IRQ[3] interrupt"; break; 1911da177e4SLinus Torvalds default: reason = "unknown"; break; 1921da177e4SLinus Torvalds } 1931da177e4SLinus Torvalds 1941da177e4SLinus Torvalds printk(KERN_CRIT "machine check type: %s%s\n", 1951da177e4SLinus Torvalds reason, mchk_header->retry ? " (retryable)" : ""); 1961da177e4SLinus Torvalds 1974fa1970aSAl Viro dik_show_regs(get_irq_regs(), NULL); 1981da177e4SLinus Torvalds 1991da177e4SLinus Torvalds #ifdef CONFIG_VERBOSE_MCHECK 2001da177e4SLinus Torvalds if (alpha_verbose_mcheck > 1) { 2011da177e4SLinus Torvalds /* Dump the logout area to give all info. */ 2021da177e4SLinus Torvalds unsigned long *ptr = (unsigned long *)la_ptr; 2031da177e4SLinus Torvalds long i; 2041da177e4SLinus Torvalds for (i = 0; i < mchk_header->size / sizeof(long); i += 2) { 2051da177e4SLinus Torvalds printk(KERN_CRIT " +%8lx %016lx %016lx\n", 2061da177e4SLinus Torvalds i*sizeof(long), ptr[i], ptr[i+1]); 2071da177e4SLinus Torvalds } 2081da177e4SLinus Torvalds } 2091da177e4SLinus Torvalds #endif /* CONFIG_VERBOSE_MCHECK */ 2101da177e4SLinus Torvalds } 2111da177e4SLinus Torvalds 2121da177e4SLinus Torvalds /* 2131da177e4SLinus Torvalds * The special RTC interrupt type. The interrupt itself was 2141da177e4SLinus Torvalds * processed by PALcode, and comes in via entInt vector 1. 2151da177e4SLinus Torvalds */ 2161da177e4SLinus Torvalds 2171da177e4SLinus Torvalds struct irqaction timer_irqaction = { 2184914d7b4SRichard Henderson .handler = rtc_timer_interrupt, 2191da177e4SLinus Torvalds .name = "timer", 2201da177e4SLinus Torvalds }; 2211da177e4SLinus Torvalds 2221da177e4SLinus Torvalds void __init 2231da177e4SLinus Torvalds init_rtc_irq(void) 2241da177e4SLinus Torvalds { 22561813188SRichard Henderson irq_set_chip_and_handler_name(RTC_IRQ, &dummy_irq_chip, 226dff64649SRichard Henderson handle_percpu_irq, "RTC"); 2271da177e4SLinus Torvalds setup_irq(RTC_IRQ, &timer_irqaction); 2281da177e4SLinus Torvalds } 2291da177e4SLinus Torvalds 2301da177e4SLinus Torvalds /* Dummy irqactions. */ 2311da177e4SLinus Torvalds struct irqaction isa_cascade_irqaction = { 2321da177e4SLinus Torvalds .handler = no_action, 2331da177e4SLinus Torvalds .name = "isa-cascade" 2341da177e4SLinus Torvalds }; 2351da177e4SLinus Torvalds 2361da177e4SLinus Torvalds struct irqaction timer_cascade_irqaction = { 2371da177e4SLinus Torvalds .handler = no_action, 2381da177e4SLinus Torvalds .name = "timer-cascade" 2391da177e4SLinus Torvalds }; 2401da177e4SLinus Torvalds 2411da177e4SLinus Torvalds struct irqaction halt_switch_irqaction = { 2421da177e4SLinus Torvalds .handler = no_action, 2431da177e4SLinus Torvalds .name = "halt-switch" 2441da177e4SLinus Torvalds }; 245