Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Alpha specific irq code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/kernel_stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <asm/machvec.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <asm/dma.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <asm/perf_event.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <asm/mce.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include "proto.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include "irq_impl.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) /* Hack minimum IPL during interrupt processing for broken hardware.  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #ifdef CONFIG_ALPHA_BROKEN_IRQ_MASK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) int __min_ipl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) EXPORT_SYMBOL(__min_ipl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27)  * Performance counter hook.  A module can override this to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28)  * do something useful.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) dummy_perf(unsigned long vector, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	irq_err_count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	printk(KERN_CRIT "Performance counter interrupt!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) void (*perf_irq)(unsigned long, struct pt_regs *) = dummy_perf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) EXPORT_SYMBOL(perf_irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41)  * The main interrupt entry point.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) asmlinkage void 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) do_entInt(unsigned long type, unsigned long vector,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	  unsigned long la_ptr, struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	struct pt_regs *old_regs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	 * Disable interrupts during IRQ handling.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	 * Note that there is no matching local_irq_enable() due to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	 * severe problems with RTI at IPL0 and some MILO PALcode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	 * (namely LX164).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	local_irq_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	switch (type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	case 0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) #ifdef CONFIG_SMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 		handle_ipi(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 		irq_err_count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 		printk(KERN_CRIT "Interprocessor interrupt? "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 		       "You must be kidding!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	case 1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 		old_regs = set_irq_regs(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 		handle_irq(RTC_IRQ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 		set_irq_regs(old_regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	case 2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 		old_regs = set_irq_regs(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 		alpha_mv.machine_check(vector, la_ptr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 		set_irq_regs(old_regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	case 3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 		old_regs = set_irq_regs(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 		alpha_mv.device_interrupt(vector);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 		set_irq_regs(old_regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	case 4:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 		perf_irq(la_ptr, regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 		printk(KERN_CRIT "Hardware intr %ld %lx? Huh?\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 		       type, vector);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	printk(KERN_CRIT "PC = %016lx PS=%04lx\n", regs->pc, regs->ps);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) void __init
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) common_init_isa_dma(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	outb(0, DMA1_RESET_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	outb(0, DMA2_RESET_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	outb(0, DMA1_CLR_MASK_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	outb(0, DMA2_CLR_MASK_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) void __init
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) init_IRQ(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	/* Just in case the platform init_irq() causes interrupts/mchecks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	   (as is the case with RAWHIDE, at least).  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	wrent(entInt, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	alpha_mv.init_irq();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)  * machine error checks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) #define MCHK_K_TPERR           0x0080
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) #define MCHK_K_TCPERR          0x0082
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) #define MCHK_K_HERR            0x0084
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) #define MCHK_K_ECC_C           0x0086
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) #define MCHK_K_ECC_NC          0x0088
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) #define MCHK_K_OS_BUGCHECK     0x008A
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) #define MCHK_K_PAL_BUGCHECK    0x0090
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) #ifndef CONFIG_SMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) struct mcheck_info __mcheck_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) process_mcheck_info(unsigned long vector, unsigned long la_ptr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 		    const char *machine, int expected)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	struct el_common *mchk_header;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	const char *reason;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	 * See if the machine check is due to a badaddr() and if so,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	 * ignore it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) #ifdef CONFIG_VERBOSE_MCHECK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	if (alpha_verbose_mcheck > 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		printk(KERN_CRIT "%s machine check %s\n", machine,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		       expected ? "expected." : "NOT expected!!!");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	if (expected) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		int cpu = smp_processor_id();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		mcheck_expected(cpu) = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		mcheck_taken(cpu) = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	mchk_header = (struct el_common *)la_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	printk(KERN_CRIT "%s machine check: vector=0x%lx pc=0x%lx code=0x%x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	       machine, vector, get_irq_regs()->pc, mchk_header->code);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	switch (mchk_header->code) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	/* Machine check reasons.  Defined according to PALcode sources.  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	case 0x80: reason = "tag parity error"; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	case 0x82: reason = "tag control parity error"; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	case 0x84: reason = "generic hard error"; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	case 0x86: reason = "correctable ECC error"; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	case 0x88: reason = "uncorrectable ECC error"; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	case 0x8A: reason = "OS-specific PAL bugcheck"; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	case 0x90: reason = "callsys in kernel mode"; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	case 0x96: reason = "i-cache read retryable error"; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	case 0x98: reason = "processor detected hard error"; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	/* System specific (these are for Alcor, at least): */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	case 0x202: reason = "system detected hard error"; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	case 0x203: reason = "system detected uncorrectable ECC error"; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	case 0x204: reason = "SIO SERR occurred on PCI bus"; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	case 0x205: reason = "parity error detected by core logic"; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	case 0x206: reason = "SIO IOCHK occurred on ISA bus"; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	case 0x207: reason = "non-existent memory error"; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	case 0x208: reason = "MCHK_K_DCSR"; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	case 0x209: reason = "PCI SERR detected"; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	case 0x20b: reason = "PCI data parity error detected"; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	case 0x20d: reason = "PCI address parity error detected"; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	case 0x20f: reason = "PCI master abort error"; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	case 0x211: reason = "PCI target abort error"; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	case 0x213: reason = "scatter/gather PTE invalid error"; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	case 0x215: reason = "flash ROM write error"; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	case 0x217: reason = "IOA timeout detected"; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	case 0x219: reason = "IOCHK#, EISA add-in board parity or other catastrophic error"; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	case 0x21b: reason = "EISA fail-safe timer timeout"; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	case 0x21d: reason = "EISA bus time-out"; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	case 0x21f: reason = "EISA software generated NMI"; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	case 0x221: reason = "unexpected ev5 IRQ[3] interrupt"; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	default: reason = "unknown"; break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	printk(KERN_CRIT "machine check type: %s%s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	       reason, mchk_header->retry ? " (retryable)" : "");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	dik_show_regs(get_irq_regs(), NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) #ifdef CONFIG_VERBOSE_MCHECK
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	if (alpha_verbose_mcheck > 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 		/* Dump the logout area to give all info.  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		unsigned long *ptr = (unsigned long *)la_ptr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 		long i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 		for (i = 0; i < mchk_header->size / sizeof(long); i += 2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 			printk(KERN_CRIT "   +%8lx %016lx %016lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 			       i*sizeof(long), ptr[i], ptr[i+1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) #endif /* CONFIG_VERBOSE_MCHECK */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)  * The special RTC interrupt type.  The interrupt itself was
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214)  * processed by PALcode, and comes in via entInt vector 1.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) void __init
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) init_rtc_irq(irq_handler_t handler)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	irq_set_chip_and_handler_name(RTC_IRQ, &dummy_irq_chip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 				      handle_percpu_irq, "RTC");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	if (!handler)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 		handler = rtc_timer_interrupt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	if (request_irq(RTC_IRQ, handler, 0, "timer", NULL))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 		pr_err("Failed to register timer interrupt\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) }