asmlinkage void plat_irq_dispatch(void)
{
unsigned int pending;
#ifdef CONFIG_SIBYTE_SB1250_PROF
/* Set compare to count to silence count/compare timer interrupts */
write_c0_compare(read_c0_count());
#endif
/*
* What a pain. We have to be really careful saving the upper 32 bits
* of any * register across function calls if we don't want them
* trashed--since were running in -o32, the calling routing never saves
* the full 64 bits of a register across a function call. Being the
* interrupt handler, we're guaranteed that interrupts are disabled
* during this code so we don't have to worry about random interrupts
* blasting the high 32 bits.
*/
pending = read_c0_cause() & read_c0_status() & ST0_IM;
#ifdef CONFIG_SIBYTE_SB1250_PROF
if (pending & CAUSEF_IP7) /* Cpu performance counter interrupt */
sbprof_cpu_intr();
else
#endif
if (pending & CAUSEF_IP4)
sb1250_timer_interrupt();
#ifdef CONFIG_SMP
else if (pending & CAUSEF_IP3)
sb1250_mailbox_interrupt();
#endif
#ifdef CONFIG_KGDB
else if (pending & CAUSEF_IP6) /* KGDB (uart 1) */
sb1250_kgdb_interrupt();
#endif
else if (pending & CAUSEF_IP2) {
unsigned long long mask;
/*
* Default...we've hit an IP[2] interrupt, which means we've
* got to check the 1250 interrupt registers to figure out what
* to do. Need to detect which CPU we're on, now that
* smp_affinity is supported.
*/
mask = __raw_readq(IOADDR(A_IMR_REGISTER(smp_processor_id(),
R_IMR_INTERRUPT_STATUS_BASE)));
if (mask)
do_IRQ(fls64(mask) - 1);
else
spurious_interrupt();
} else
spurious_interrupt();
}
static void rt288x_intc_irq_dispatch(void)
{
u32 pending;
pending = ramips_intc_get_status();
if (pending & RT2880_INTC_INT_TIMER0)
do_IRQ(RT2880_INTC_IRQ_TIMER0);
else if (pending & RT2880_INTC_INT_TIMER1)
do_IRQ(RT2880_INTC_IRQ_TIMER1);
else if (pending & RT2880_INTC_INT_UART0)
do_IRQ(RT2880_INTC_IRQ_UART0);
else if (pending & RT2880_INTC_INT_PCM)
do_IRQ(RT2880_INTC_IRQ_PCM);
else if (pending & RT2880_INTC_INT_UART1)
do_IRQ(RT2880_INTC_IRQ_UART1);
else if (pending & RT2880_INTC_INT_PIO)
do_IRQ(RT2880_INTC_IRQ_PIO);
else
spurious_interrupt();
}
static void rt3883_intc_irq_dispatch(void)
{
u32 pending;
pending = ramips_intc_get_status();
if (pending & RT3883_INTC_INT_TIMER0)
do_IRQ(RT3883_INTC_IRQ_TIMER0);
else if (pending & RT3883_INTC_INT_TIMER1)
do_IRQ(RT3883_INTC_IRQ_TIMER1);
else if (pending & RT3883_INTC_INT_UART0)
do_IRQ(RT3883_INTC_IRQ_UART0);
else if (pending & RT3883_INTC_INT_UART1)
do_IRQ(RT3883_INTC_IRQ_UART1);
else if (pending & RT3883_INTC_INT_PERFC)
do_IRQ(RT3883_INTC_IRQ_PERFC);
else if (pending & RT3883_INTC_INT_UHST)
do_IRQ(RT3883_INTC_IRQ_UHST);
/* TODO: handle PIO interrupts as well */
else
spurious_interrupt();
}
static void qca955x_ip3_irq_dispatch(unsigned int irq, struct irq_desc *desc)
{
u32 status;
disable_irq_nosync(irq);
status = ath79_reset_rr(QCA955X_RESET_REG_EXT_INT_STATUS);
status &= QCA955X_EXT_INT_PCIE_RC2_ALL |
QCA955X_EXT_INT_USB1 |
QCA955X_EXT_INT_USB2;
if (status == 0) {
spurious_interrupt();
goto enable;
}
if (status & QCA955X_EXT_INT_USB1) {
/* TODO: flush DDR? */
generic_handle_irq(ATH79_IP3_IRQ(0));
}
if (status & QCA955X_EXT_INT_USB2) {
/* TODO: flush DDR? */
generic_handle_irq(ATH79_IP3_IRQ(1));
}
if (status & QCA955X_EXT_INT_PCIE_RC2_ALL) {
/* TODO: flush DDR? */
generic_handle_irq(ATH79_IP3_IRQ(2));
}
enable:
enable_irq(irq);
}
asmlinkage void plat_irq_dispatch(void)
{
unsigned int cpu = smp_processor_id();
unsigned int pending;
/*
* What a pain. We have to be really careful saving the upper 32 bits
* of any * register across function calls if we don't want them
* trashed--since were running in -o32, the calling routing never saves
* the full 64 bits of a register across a function call. Being the
* interrupt handler, we're guaranteed that interrupts are disabled
* during this code so we don't have to worry about random interrupts
* blasting the high 32 bits.
*/
pending = read_c0_cause() & read_c0_status() & ST0_IM;
if (pending & CAUSEF_IP7) /* CPU performance counter interrupt */
do_IRQ(MIPS_CPU_IRQ_BASE + 7);
else if (pending & CAUSEF_IP4)
do_IRQ(K_INT_TIMER_0 + cpu); /* sb1250_timer_interrupt() */
#ifdef CONFIG_SMP
else if (pending & CAUSEF_IP3)
sb1250_mailbox_interrupt();
#endif
else if (pending & CAUSEF_IP2)
dispatch_ip2();
else
spurious_interrupt();
}
static void ar7_cascade(void)
{
u32 status;
int i, irq;
/* Primary IRQ's */
irq = readl(REG(PIR_OFFSET)) & 0x3f;
if (irq) {
do_IRQ(ar7_irq_base + irq);
return;
}
/* Secondary IRQ's are cascaded through primary '0' */
writel(1, REG(CR_OFFSET(irq)));
status = readl(REG(SEC_SR_OFFSET));
for (i = 0; i < 32; i++) {
if (status & 1) {
do_IRQ(ar7_irq_base + i + 40);
return;
}
status >>= 1;
}
spurious_interrupt();
}
/*! @brief the interrupt exception service function.
* @details The \cplat_irq_dispatch() function is the interrupt exception
* service function called. When an exception is set and the exception
* code indicates an interrupt (0x00).
*/
asmlinkage void plat_irq_dispatch(
struct pt_regs *regs /*!< registers of the interrupted task */
)
{
/* Get the current pending interrupt status */
unsigned long pending = read_c0_cause() & read_c0_status();
/*! @note Clear all pending interrupts before dispatching. The
interrupt information structure will call the "end" function
from the do_IRQ function that should re-enable the specific
interrupt while completing the interrupt handling (see
irq_chip structure). */
/* Disable all MIPS active pending interrupts */
clear_c0_status(pending);
/* These are the interrupts that are to be dispatched */
if( pending & (STATUSF_IP7|STATUSF_IP2) ) {
/* Dispatch timer interrupt (HW INT#5/IP7) */
if (pending & STATUSF_IP7)
brcm_mips_int7_dispatch(regs);
/* Dispatch shared interrupt (HW INT#0/IP2) */
if (pending & STATUSF_IP2)
brcm_mips_int2_dispatch(regs);
/* Return following the successful interrupt exception handling */
return;
}
/* Other interrupts are unhandled and treated as spurious interrupts */
spurious_interrupt(regs);
}
asmlinkage void plat_irq_dispatch(void)
{
unsigned long pending;
pending = read_c0_status() & read_c0_cause() & ST0_IM;
if (pending & STATUSF_IP7)
do_IRQ(AR71XX_CPU_IRQ_TIMER);
#ifdef CONFIG_PCI
else if (pending & STATUSF_IP2)
ar71xx_pci_irq_dispatch();
#endif
else if (pending & STATUSF_IP4)
do_IRQ(AR71XX_CPU_IRQ_GE0);
else if (pending & STATUSF_IP5)
do_IRQ(AR71XX_CPU_IRQ_GE1);
else if (pending & STATUSF_IP3)
do_IRQ(AR71XX_CPU_IRQ_USB);
else if (pending & STATUSF_IP6)
ar71xx_misc_irq_dispatch();
else
spurious_interrupt();
}
asmlinkage void plat_irq_dispatch(void)
{
unsigned long pending;
pending = read_c0_status() & read_c0_cause() & ST0_IM;
if (pending & STATUSF_IP7)
do_IRQ(ATH79_CPU_IRQ(7));
else if (pending & STATUSF_IP2)
ath79_ip2_handler();
else if (pending & STATUSF_IP4)
do_IRQ(ATH79_CPU_IRQ(4));
else if (pending & STATUSF_IP5)
do_IRQ(ATH79_CPU_IRQ(5));
else if (pending & STATUSF_IP3)
ath79_ip3_handler();
else if (pending & STATUSF_IP6)
do_IRQ(ATH79_CPU_IRQ(6));
else
spurious_interrupt();
}
asmlinkage void
vrc5476_irq_dispatch(struct pt_regs *regs)
{
extern unsigned int do_IRQ(int irq, struct pt_regs *regs);
extern void spurious_interrupt(void);
u32 mask;
int nile4_irq;
mask = nile4_get_irq_stat(0);
/* quick check for possible time interrupt */
if (mask & (1 << VRC5476_IRQ_GPT)) {
do_IRQ(VRC5476_IRQ_BASE + VRC5476_IRQ_GPT, regs);
return;
}
/* check for i8259 interrupts */
if (mask & (1 << VRC5476_I8259_CASCADE)) {
int i8259_irq = nile4_i8259_iack();
do_IRQ(I8259_IRQ_BASE + i8259_irq, regs);
return;
}
/* regular nile4 interrupts (we should not really have any */
for (nile4_irq = 0; mask; nile4_irq++, mask >>= 1) {
if (mask & 1) {
do_IRQ(VRC5476_IRQ_BASE + nile4_irq, regs);
return;
}
}
spurious_interrupt();
}
asmlinkage void plat_irq_dispatch(void)
{
unsigned long pending;
pending = read_c0_status() & read_c0_cause() & ST0_IM;
if (pending & STATUSF_IP7)
do_IRQ(ATH79_CPU_IRQ_TIMER);
else if (pending & STATUSF_IP2) {
ath79_ddr_wb_flush(ath79_ip2_flush_reg);
do_IRQ(ATH79_CPU_IRQ_IP2);
}
else if (pending & STATUSF_IP4)
do_IRQ(ATH79_CPU_IRQ_GE0);
else if (pending & STATUSF_IP5)
do_IRQ(ATH79_CPU_IRQ_GE1);
else if (pending & STATUSF_IP3) {
ath79_ddr_wb_flush(ath79_ip3_flush_reg);
do_IRQ(ATH79_CPU_IRQ_USB);
}
else if (pending & STATUSF_IP6)
do_IRQ(ATH79_CPU_IRQ_MISC);
else
spurious_interrupt();
}
asmlinkage void plat_irq_dispatch(void)
{
unsigned long pending;
pending = read_c0_status() & read_c0_cause() & ST0_IM;
if (pending & STATUSF_IP7)
do_IRQ(AR71XX_CPU_IRQ_TIMER);
else if (pending & STATUSF_IP2)
ip2_handler();
else if (pending & STATUSF_IP4)
do_IRQ(AR71XX_CPU_IRQ_GE0);
else if (pending & STATUSF_IP5)
do_IRQ(AR71XX_CPU_IRQ_GE1);
else if (pending & STATUSF_IP3)
ip3_handler();
else if (pending & STATUSF_IP6)
ar71xx_misc_irq_dispatch();
else
spurious_interrupt();
}
asmlinkage void plat_irq_dispatch(void)
{
unsigned int pending = read_c0_status() & read_c0_cause();
if (pending & CAUSEF_IP7)
{
do_IRQ(M36_IRQ_TIMER);
}
else if ((pending & CAUSEF_IP3) || (pending & CAUSEF_IP2))
{
sys_irqdispatch();
}
else
{
#ifdef CONFIG_ENABLE_RPC
{
unsigned long rpc_status;
rpc_status = *(volatile unsigned char *)(sys_rpc_addr);
rpc_status &= sys_rpc_mask;
if(rpc_status & sys_rpc_irq1_mask)
do_IRQ(71);
if(rpc_status & sys_rpc_irq2_mask)
do_IRQ(70);
}
#endif
spurious_interrupt();
}
}
static void rt305x_intc_irq_dispatch(void)
{
u32 pending;
pending = ramips_intc_get_status();
if (pending & RT305X_INTC_INT_TIMER0)
do_IRQ(RT305X_INTC_IRQ_TIMER0);
else if (pending & RT305X_INTC_INT_TIMER1)
do_IRQ(RT305X_INTC_IRQ_TIMER1);
else if (pending & RT305X_INTC_INT_UART0)
do_IRQ(RT305X_INTC_IRQ_UART0);
else if (pending & RT305X_INTC_INT_UART1)
do_IRQ(RT305X_INTC_IRQ_UART1);
else if (pending & RT305X_INTC_INT_PERFC)
do_IRQ(RT305X_INTC_IRQ_PERFC);
else if (pending & RT305X_INTC_INT_OTG)
do_IRQ(RT305X_INTC_IRQ_OTG);
else if (pending & RT305X_INTC_INT_PIO)
do_IRQ(RT305X_INTC_IRQ_PIO);
else
spurious_interrupt();
}
static void ar71xx_misc_irq_dispatch(void)
{
u32 pending;
pending = ar71xx_reset_rr(RESET_REG_MISC_INT_STATUS)
& ar71xx_reset_rr(RESET_REG_MISC_INT_ENABLE);
if (pending & MISC_INT_UART)
do_IRQ(AR71XX_MISC_IRQ_UART);
else if (pending & MISC_INT_DMA)
do_IRQ(AR71XX_MISC_IRQ_DMA);
else if (pending & MISC_INT_PERFC)
do_IRQ(AR71XX_MISC_IRQ_PERFC);
else if (pending & MISC_INT_TIMER)
do_IRQ(AR71XX_MISC_IRQ_TIMER);
else if (pending & MISC_INT_OHCI)
do_IRQ(AR71XX_MISC_IRQ_OHCI);
else if (pending & MISC_INT_ERROR)
do_IRQ(AR71XX_MISC_IRQ_ERROR);
else if (pending & MISC_INT_GPIO)
ar71xx_gpio_irq_dispatch();
else if (pending & MISC_INT_WDOG)
do_IRQ(AR71XX_MISC_IRQ_WDOG);
else
spurious_interrupt();
}
static void i8259_irqdispatch(void)
{
int irq;
irq = mach_i8259_irq();
if (irq >= 0)
do_IRQ(irq);
else
spurious_interrupt();
}
asmlinkage void plat_irq_dispatch(void)
{
unsigned int pending = read_c0_status() & read_c0_cause() & ST0_IM;
if (pending & STATUSF_IP2)
do_IRQ(2);
else if (pending & STATUSF_IP3)
do_IRQ(3);
else
spurious_interrupt();
}
asmlinkage void plat_irq_dispatch(void)
{
unsigned int pending = read_c0_status() & read_c0_cause() & ST0_IM;
if (pending & STATUSF_IP7) /* cpu timer */
do_IRQ(7);
else if (pending & STATUSF_IP2) /* int0 hardware line */
ar7_cascade();
else
spurious_interrupt();
}
static void ralink_intc_irq_handler(unsigned int irq, struct irq_desc *desc)
{
u32 pending = rt_intc_r32(INTC_REG_STATUS0);
if (pending) {
struct irq_domain *domain = irq_desc_get_handler_data(desc);
generic_handle_irq(irq_find_mapping(domain, __ffs(pending)));
} else {
spurious_interrupt();
}
}
asmlinkage void plat_irq_dispatch(void)
{
unsigned int pending;
#if defined (CONFIG_RALINK_RT3883) || defined (CONFIG_RALINK_MT7620) || \
defined (CONFIG_RALINK_MT7628)
unsigned int pci_status;
#endif
pending = read_c0_status() & read_c0_cause() & ST0_IM;
if (!pending) {
spurious_interrupt();
return;
}
if (pending & CAUSEF_IP7) {
do_IRQ(SURFBOARDINT_MIPS_TIMER); // CPU Timer
return;
}
if (pending & CAUSEF_IP5)
do_IRQ(SURFBOARDINT_FE); // Frame Engine
if (pending & CAUSEF_IP6)
do_IRQ(SURFBOARDINT_WLAN); // Wireless
if (pending & CAUSEF_IP4) {
#if defined (CONFIG_RALINK_RT3883)
pci_status = RALINK_PCI_PCIINT_ADDR;
if (pci_status & 0x100000)
do_IRQ(SURFBOARDINT_PCIE0);
#if defined (CONFIG_PCI_ONLY) || defined (CONFIG_PCIE_PCI_CONCURRENT)
else if (pci_status & 0x040000)
do_IRQ(SURFBOARDINT_PCI0);
else
do_IRQ(SURFBOARDINT_PCI1);
#endif
#elif defined (CONFIG_RALINK_MT7620) || defined (CONFIG_RALINK_MT7628)
pci_status = RALINK_PCI_PCIINT_ADDR;
if (pci_status & 0x100000)
do_IRQ(SURFBOARDINT_PCIE0);
#endif
}
if (pending & CAUSEF_IP3)
ralink_hw0_irqdispatch(1);
else
if (pending & CAUSEF_IP2)
ralink_hw0_irqdispatch(0);
#if 0
/* clear new potentially pending IP6..IP2 */
set_c0_status( STATUSF_IP6 | STATUSF_IP5 | STATUSF_IP4 | STATUSF_IP3 | STATUSF_IP2 );
#endif
}
asmlinkage void plat_irq_dispatch(void)
{
unsigned int pending = read_c0_status() & read_c0_cause();
if (pending & STATUSF_IP4)
pic_dispatch();
else if (pending & STATUSF_IP7)
do_IRQ(PNX833X_TIMER_IRQ);
else
spurious_interrupt();
}
asmlinkage void plat_irq_dispatch(void)
{
const unsigned long core_id = cvmx_get_core_num();
const uint64_t ciu_sum0_address = CVMX_CIU_INTX_SUM0(core_id * 2);
const uint64_t ciu_en0_address = CVMX_CIU_INTX_EN0(core_id * 2);
const uint64_t ciu_sum1_address = CVMX_CIU_INT_SUM1;
const uint64_t ciu_en1_address = CVMX_CIU_INTX_EN1(core_id * 2 + 1);
unsigned long cop0_cause;
unsigned long cop0_status;
uint64_t ciu_en;
uint64_t ciu_sum;
while (1) {
cop0_cause = read_c0_cause();
cop0_status = read_c0_status();
cop0_cause &= cop0_status;
cop0_cause &= ST0_IM;
if (unlikely(cop0_cause & STATUSF_IP2)) {
ciu_sum = cvmx_read_csr(ciu_sum0_address);
ciu_en = cvmx_read_csr(ciu_en0_address);
ciu_sum &= ciu_en;
if (likely(ciu_sum))
do_IRQ(fls64(ciu_sum) + OCTEON_IRQ_WORKQ0 - 1);
else
spurious_interrupt();
} else if (unlikely(cop0_cause & STATUSF_IP3)) {
ciu_sum = cvmx_read_csr(ciu_sum1_address);
ciu_en = cvmx_read_csr(ciu_en1_address);
ciu_sum &= ciu_en;
if (likely(ciu_sum))
do_IRQ(fls64(ciu_sum) + OCTEON_IRQ_WDOG0 - 1);
else
spurious_interrupt();
} else if (likely(cop0_cause)) {
do_IRQ(fls(cop0_cause) - 9 + MIPS_CPU_IRQ_BASE);
} else {
break;
}
}
}
asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
{
unsigned int pending = read_c0_cause() & read_c0_status();
if (pending & STATUSF_IP7)
brcm_mips_int7_dispatch(regs);
else if (pending & STATUSF_IP2)
brcm_mips_int2_dispatch(regs);
else
spurious_interrupt(regs);
}
static void adm8668_irq_cascade(void)
{
int irq;
u32 intsrc;
intsrc = intc_read_reg(IRQ_STATUS_REG) & IRQ_MASK;
if (intsrc) {
irq = fls(intsrc) - 1;
do_IRQ(irq);
} else
spurious_interrupt();
}
/*
* IRQs on the SEAD board look basically are combined together on hardware
* interrupt 0 (MIPS IRQ 2)) like:
*
* MIPS IRQ Source
* -------- ------
* 0 Software (ignored)
* 1 Software (ignored)
* 2 UART0 (hw0)
* 3 UART1 (hw1)
* 4 Hardware (ignored)
* 5 Hardware (ignored)
* 6 Hardware (ignored)
* 7 R4k timer (what we use)
*
* We handle the IRQ according to _our_ priority which is:
*
* Highest ---- R4k Timer
* Lowest ---- Combined hardware interrupt
*
* then we just return, if multiple IRQs are pending then we will just take
* another exception, big deal.
*/
asmlinkage void plat_irq_dispatch(void)
{
unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM;
int irq;
irq = irq_ffs(pending);
if (irq >= 0)
do_IRQ(MIPSCPU_INT_BASE + irq);
else
spurious_interrupt(regs);
}
asmlinkage void plat_irq_dispatch(void)
{
unsigned int pending = read_c0_status() & read_c0_cause();
if (pending & STATUSF_IP7) /* cpu timer */
do_IRQ(TX4927_IRQ_CPU_TIMER);
else if (pending & STATUSF_IP2) { /* tx4927 pic */
unsigned int irq = tx4927_irq_nested();
if (unlikely(irq == 0)) {
spurious_interrupt();
return;
}
do_IRQ(irq);
} else if (pending & STATUSF_IP0) /* user line 0 */
do_IRQ(TX4927_IRQ_USER0);
else if (pending & STATUSF_IP1) /* user line 1 */
do_IRQ(TX4927_IRQ_USER1);
else
spurious_interrupt();
}
static void adm5120_intc_irq_dispatch(void)
{
unsigned long status;
int irq;
status = intc_read_reg(INTC_REG_IRQ_STATUS) & INTC_INT_ALL;
if (status) {
irq = ADM5120_INTC_IRQ_BASE + fls(status) - 1;
do_IRQ(irq);
} else
spurious_interrupt();
}
static void ar71xx_gpio_irq_dispatch(void)
{
u32 pending;
pending = ar71xx_gpio_rr(GPIO_REG_INT_PENDING)
& ar71xx_gpio_rr(GPIO_REG_INT_ENABLE);
if (pending)
do_IRQ(AR71XX_GPIO_IRQ_BASE + fls(pending) - 1);
else
spurious_interrupt();
}
asmlinkage void plat_irq_dispatch(void)
{
unsigned long pending;
pending = read_c0_status() & read_c0_cause() & ST0_IM;
if (pending & STATUSF_IP7)
do_IRQ(ADM5120_IRQ_COUNTER);
else if (pending & STATUSF_IP2)
adm5120_intc_irq_dispatch();
else
spurious_interrupt();
}
asmlinkage void plat_irq_dispatch(void)
{
unsigned int pending = read_c0_status() & read_c0_cause() & ST0_IM;
if (pending & STATUSF_IP7)
do_IRQ(WRPPMC_MIPS_TIMER_IRQ); /* CPU Compare/Count internal timer */
else if (pending & STATUSF_IP6)
do_IRQ(WRPPMC_UART16550_IRQ); /* UART 16550 port */
else if (pending & STATUSF_IP3)
do_IRQ(WRPPMC_PCI_INTA_IRQ); /* PCI INT_A */
else
spurious_interrupt();
}