mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
225 lines
6.1 KiB
225 lines
6.1 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
|
* Alpha specific irq code. |
|
*/ |
|
|
|
#include <linux/init.h> |
|
#include <linux/sched.h> |
|
#include <linux/irq.h> |
|
#include <linux/kernel_stat.h> |
|
#include <linux/module.h> |
|
|
|
#include <asm/machvec.h> |
|
#include <asm/dma.h> |
|
#include <asm/perf_event.h> |
|
#include <asm/mce.h> |
|
|
|
#include "proto.h" |
|
#include "irq_impl.h" |
|
|
|
/* Hack minimum IPL during interrupt processing for broken hardware. */ |
|
#ifdef CONFIG_ALPHA_BROKEN_IRQ_MASK |
|
int __min_ipl; |
|
EXPORT_SYMBOL(__min_ipl); |
|
#endif |
|
|
|
/* |
|
* Performance counter hook. A module can override this to |
|
* do something useful. |
|
*/ |
|
static void |
|
dummy_perf(unsigned long vector, struct pt_regs *regs) |
|
{ |
|
irq_err_count++; |
|
printk(KERN_CRIT "Performance counter interrupt!\n"); |
|
} |
|
|
|
void (*perf_irq)(unsigned long, struct pt_regs *) = dummy_perf; |
|
EXPORT_SYMBOL(perf_irq); |
|
|
|
/* |
|
* The main interrupt entry point. |
|
*/ |
|
|
|
asmlinkage void |
|
do_entInt(unsigned long type, unsigned long vector, |
|
unsigned long la_ptr, struct pt_regs *regs) |
|
{ |
|
struct pt_regs *old_regs; |
|
|
|
/* |
|
* Disable interrupts during IRQ handling. |
|
* Note that there is no matching local_irq_enable() due to |
|
* severe problems with RTI at IPL0 and some MILO PALcode |
|
* (namely LX164). |
|
*/ |
|
local_irq_disable(); |
|
switch (type) { |
|
case 0: |
|
#ifdef CONFIG_SMP |
|
handle_ipi(regs); |
|
return; |
|
#else |
|
irq_err_count++; |
|
printk(KERN_CRIT "Interprocessor interrupt? " |
|
"You must be kidding!\n"); |
|
#endif |
|
break; |
|
case 1: |
|
old_regs = set_irq_regs(regs); |
|
handle_irq(RTC_IRQ); |
|
set_irq_regs(old_regs); |
|
return; |
|
case 2: |
|
old_regs = set_irq_regs(regs); |
|
alpha_mv.machine_check(vector, la_ptr); |
|
set_irq_regs(old_regs); |
|
return; |
|
case 3: |
|
old_regs = set_irq_regs(regs); |
|
alpha_mv.device_interrupt(vector); |
|
set_irq_regs(old_regs); |
|
return; |
|
case 4: |
|
perf_irq(la_ptr, regs); |
|
return; |
|
default: |
|
printk(KERN_CRIT "Hardware intr %ld %lx? Huh?\n", |
|
type, vector); |
|
} |
|
printk(KERN_CRIT "PC = %016lx PS=%04lx\n", regs->pc, regs->ps); |
|
} |
|
|
|
void __init |
|
common_init_isa_dma(void) |
|
{ |
|
outb(0, DMA1_RESET_REG); |
|
outb(0, DMA2_RESET_REG); |
|
outb(0, DMA1_CLR_MASK_REG); |
|
outb(0, DMA2_CLR_MASK_REG); |
|
} |
|
|
|
void __init |
|
init_IRQ(void) |
|
{ |
|
/* Just in case the platform init_irq() causes interrupts/mchecks |
|
(as is the case with RAWHIDE, at least). */ |
|
wrent(entInt, 0); |
|
|
|
alpha_mv.init_irq(); |
|
} |
|
|
|
/* |
|
* machine error checks |
|
*/ |
|
#define MCHK_K_TPERR 0x0080 |
|
#define MCHK_K_TCPERR 0x0082 |
|
#define MCHK_K_HERR 0x0084 |
|
#define MCHK_K_ECC_C 0x0086 |
|
#define MCHK_K_ECC_NC 0x0088 |
|
#define MCHK_K_OS_BUGCHECK 0x008A |
|
#define MCHK_K_PAL_BUGCHECK 0x0090 |
|
|
|
#ifndef CONFIG_SMP |
|
struct mcheck_info __mcheck_info; |
|
#endif |
|
|
|
void |
|
process_mcheck_info(unsigned long vector, unsigned long la_ptr, |
|
const char *machine, int expected) |
|
{ |
|
struct el_common *mchk_header; |
|
const char *reason; |
|
|
|
/* |
|
* See if the machine check is due to a badaddr() and if so, |
|
* ignore it. |
|
*/ |
|
|
|
#ifdef CONFIG_VERBOSE_MCHECK |
|
if (alpha_verbose_mcheck > 1) { |
|
printk(KERN_CRIT "%s machine check %s\n", machine, |
|
expected ? "expected." : "NOT expected!!!"); |
|
} |
|
#endif |
|
|
|
if (expected) { |
|
int cpu = smp_processor_id(); |
|
mcheck_expected(cpu) = 0; |
|
mcheck_taken(cpu) = 1; |
|
return; |
|
} |
|
|
|
mchk_header = (struct el_common *)la_ptr; |
|
|
|
printk(KERN_CRIT "%s machine check: vector=0x%lx pc=0x%lx code=0x%x\n", |
|
machine, vector, get_irq_regs()->pc, mchk_header->code); |
|
|
|
switch (mchk_header->code) { |
|
/* Machine check reasons. Defined according to PALcode sources. */ |
|
case 0x80: reason = "tag parity error"; break; |
|
case 0x82: reason = "tag control parity error"; break; |
|
case 0x84: reason = "generic hard error"; break; |
|
case 0x86: reason = "correctable ECC error"; break; |
|
case 0x88: reason = "uncorrectable ECC error"; break; |
|
case 0x8A: reason = "OS-specific PAL bugcheck"; break; |
|
case 0x90: reason = "callsys in kernel mode"; break; |
|
case 0x96: reason = "i-cache read retryable error"; break; |
|
case 0x98: reason = "processor detected hard error"; break; |
|
|
|
/* System specific (these are for Alcor, at least): */ |
|
case 0x202: reason = "system detected hard error"; break; |
|
case 0x203: reason = "system detected uncorrectable ECC error"; break; |
|
case 0x204: reason = "SIO SERR occurred on PCI bus"; break; |
|
case 0x205: reason = "parity error detected by core logic"; break; |
|
case 0x206: reason = "SIO IOCHK occurred on ISA bus"; break; |
|
case 0x207: reason = "non-existent memory error"; break; |
|
case 0x208: reason = "MCHK_K_DCSR"; break; |
|
case 0x209: reason = "PCI SERR detected"; break; |
|
case 0x20b: reason = "PCI data parity error detected"; break; |
|
case 0x20d: reason = "PCI address parity error detected"; break; |
|
case 0x20f: reason = "PCI master abort error"; break; |
|
case 0x211: reason = "PCI target abort error"; break; |
|
case 0x213: reason = "scatter/gather PTE invalid error"; break; |
|
case 0x215: reason = "flash ROM write error"; break; |
|
case 0x217: reason = "IOA timeout detected"; break; |
|
case 0x219: reason = "IOCHK#, EISA add-in board parity or other catastrophic error"; break; |
|
case 0x21b: reason = "EISA fail-safe timer timeout"; break; |
|
case 0x21d: reason = "EISA bus time-out"; break; |
|
case 0x21f: reason = "EISA software generated NMI"; break; |
|
case 0x221: reason = "unexpected ev5 IRQ[3] interrupt"; break; |
|
default: reason = "unknown"; break; |
|
} |
|
|
|
printk(KERN_CRIT "machine check type: %s%s\n", |
|
reason, mchk_header->retry ? " (retryable)" : ""); |
|
|
|
dik_show_regs(get_irq_regs(), NULL); |
|
|
|
#ifdef CONFIG_VERBOSE_MCHECK |
|
if (alpha_verbose_mcheck > 1) { |
|
/* Dump the logout area to give all info. */ |
|
unsigned long *ptr = (unsigned long *)la_ptr; |
|
long i; |
|
for (i = 0; i < mchk_header->size / sizeof(long); i += 2) { |
|
printk(KERN_CRIT " +%8lx %016lx %016lx\n", |
|
i*sizeof(long), ptr[i], ptr[i+1]); |
|
} |
|
} |
|
#endif /* CONFIG_VERBOSE_MCHECK */ |
|
} |
|
|
|
/* |
|
* The special RTC interrupt type. The interrupt itself was |
|
* processed by PALcode, and comes in via entInt vector 1. |
|
*/ |
|
void __init |
|
init_rtc_irq(irq_handler_t handler) |
|
{ |
|
irq_set_chip_and_handler_name(RTC_IRQ, &dummy_irq_chip, |
|
handle_percpu_irq, "RTC"); |
|
if (!handler) |
|
handler = rtc_timer_interrupt; |
|
if (request_irq(RTC_IRQ, handler, 0, "timer", NULL)) |
|
pr_err("Failed to register timer interrupt\n"); |
|
}
|
|
|