| /* |
| * Set up the interrupt priorities |
| * |
| * Copyright 2004-2009 Analog Devices Inc. |
| * 2003 Bas Vermeulen <bas@buyways.nl> |
| * 2002 Arcturus Networks Inc. MaTed <mated@sympatico.ca> |
| * 2000-2001 Lineo, Inc. D. Jefff Dionne <jeff@lineo.ca> |
| * 1999 D. Jeff Dionne <jeff@uclinux.org> |
| * 1996 Roman Zippel |
| * |
| * Licensed under the GPL-2 |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/kernel_stat.h> |
| #include <linux/seq_file.h> |
| #include <linux/irq.h> |
| #include <linux/sched.h> |
| #include <linux/syscore_ops.h> |
| #include <asm/delay.h> |
| #ifdef CONFIG_IPIPE |
| #include <linux/ipipe.h> |
| #endif |
| #include <asm/traps.h> |
| #include <asm/blackfin.h> |
| #include <asm/gpio.h> |
| #include <asm/irq_handler.h> |
| #include <asm/dpmc.h> |
| #include <asm/traps.h> |
| |
| /* |
| * NOTES: |
| * - we have separated the physical Hardware interrupt from the |
| * levels that the LINUX kernel sees (see the description in irq.h) |
| * - |
| */ |
| |
| #ifndef CONFIG_SMP |
| /* Initialize this to an actual value to force it into the .data |
| * section so that we know it is properly initialized at entry into |
| * the kernel but before bss is initialized to zero (which is where |
| * it would live otherwise). The 0x1f magic represents the IRQs we |
| * cannot actually mask out in hardware. |
| */ |
| unsigned long bfin_irq_flags = 0x1f; |
| EXPORT_SYMBOL(bfin_irq_flags); |
| #endif |
| |
| #ifdef CONFIG_PM |
| unsigned long bfin_sic_iwr[3]; /* Up to 3 SIC_IWRx registers */ |
| unsigned vr_wakeup; |
| #endif |
| |
| #ifndef SEC_GCTL |
| static struct ivgx { |
| /* irq number for request_irq, available in mach-bf5xx/irq.h */ |
| unsigned int irqno; |
| /* corresponding bit in the SIC_ISR register */ |
| unsigned int isrflag; |
| } ivg_table[NR_PERI_INTS]; |
| |
| static struct ivg_slice { |
| /* position of first irq in ivg_table for given ivg */ |
| struct ivgx *ifirst; |
| struct ivgx *istop; |
| } ivg7_13[IVG13 - IVG7 + 1]; |
| |
| |
| /* |
| * Search SIC_IAR and fill tables with the irqvalues |
| * and their positions in the SIC_ISR register. |
| */ |
| static void __init search_IAR(void) |
| { |
| unsigned ivg, irq_pos = 0; |
| for (ivg = 0; ivg <= IVG13 - IVG7; ivg++) { |
| int irqN; |
| |
| ivg7_13[ivg].istop = ivg7_13[ivg].ifirst = &ivg_table[irq_pos]; |
| |
| for (irqN = 0; irqN < NR_PERI_INTS; irqN += 4) { |
| int irqn; |
| u32 iar = |
| bfin_read32((unsigned long *)SIC_IAR0 + |
| #if defined(CONFIG_BF51x) || defined(CONFIG_BF52x) || \ |
| defined(CONFIG_BF538) || defined(CONFIG_BF539) |
| ((irqN % 32) >> 3) + ((irqN / 32) * ((SIC_IAR4 - SIC_IAR0) / 4)) |
| #else |
| (irqN >> 3) |
| #endif |
| ); |
| for (irqn = irqN; irqn < irqN + 4; ++irqn) { |
| int iar_shift = (irqn & 7) * 4; |
| if (ivg == (0xf & (iar >> iar_shift))) { |
| ivg_table[irq_pos].irqno = IVG7 + irqn; |
| ivg_table[irq_pos].isrflag = 1 << (irqn % 32); |
| ivg7_13[ivg].istop++; |
| irq_pos++; |
| } |
| } |
| } |
| } |
| } |
| #endif |
| |
| /* |
| * This is for core internal IRQs |
| */ |
| void bfin_ack_noop(struct irq_data *d) |
| { |
| /* Dummy function. */ |
| } |
| |
| static void bfin_core_mask_irq(struct irq_data *d) |
| { |
| bfin_irq_flags &= ~(1 << d->irq); |
| if (!hard_irqs_disabled()) |
| hard_local_irq_enable(); |
| } |
| |
| static void bfin_core_unmask_irq(struct irq_data *d) |
| { |
| bfin_irq_flags |= 1 << d->irq; |
| /* |
| * If interrupts are enabled, IMASK must contain the same value |
| * as bfin_irq_flags. Make sure that invariant holds. If interrupts |
| * are currently disabled we need not do anything; one of the |
| * callers will take care of setting IMASK to the proper value |
| * when reenabling interrupts. |
| * local_irq_enable just does "STI bfin_irq_flags", so it's exactly |
| * what we need. |
| */ |
| if (!hard_irqs_disabled()) |
| hard_local_irq_enable(); |
| return; |
| } |
| |
| #ifndef SEC_GCTL |
| void bfin_internal_mask_irq(unsigned int irq) |
| { |
| unsigned long flags = hard_local_irq_save(); |
| #ifdef SIC_IMASK0 |
| unsigned mask_bank = BFIN_SYSIRQ(irq) / 32; |
| unsigned mask_bit = BFIN_SYSIRQ(irq) % 32; |
| bfin_write_SIC_IMASK(mask_bank, bfin_read_SIC_IMASK(mask_bank) & |
| ~(1 << mask_bit)); |
| # if defined(CONFIG_SMP) || defined(CONFIG_ICC) |
| bfin_write_SICB_IMASK(mask_bank, bfin_read_SICB_IMASK(mask_bank) & |
| ~(1 << mask_bit)); |
| # endif |
| #else |
| bfin_write_SIC_IMASK(bfin_read_SIC_IMASK() & |
| ~(1 << BFIN_SYSIRQ(irq))); |
| #endif /* end of SIC_IMASK0 */ |
| hard_local_irq_restore(flags); |
| } |
| |
| static void bfin_internal_mask_irq_chip(struct irq_data *d) |
| { |
| bfin_internal_mask_irq(d->irq); |
| } |
| |
| #ifdef CONFIG_SMP |
| void bfin_internal_unmask_irq_affinity(unsigned int irq, |
| const struct cpumask *affinity) |
| #else |
| void bfin_internal_unmask_irq(unsigned int irq) |
| #endif |
| { |
| unsigned long flags = hard_local_irq_save(); |
| |
| #ifdef SIC_IMASK0 |
| unsigned mask_bank = BFIN_SYSIRQ(irq) / 32; |
| unsigned mask_bit = BFIN_SYSIRQ(irq) % 32; |
| # ifdef CONFIG_SMP |
| if (cpumask_test_cpu(0, affinity)) |
| # endif |
| bfin_write_SIC_IMASK(mask_bank, |
| bfin_read_SIC_IMASK(mask_bank) | |
| (1 << mask_bit)); |
| # ifdef CONFIG_SMP |
| if (cpumask_test_cpu(1, affinity)) |
| bfin_write_SICB_IMASK(mask_bank, |
| bfin_read_SICB_IMASK(mask_bank) | |
| (1 << mask_bit)); |
| # endif |
| #else |
| bfin_write_SIC_IMASK(bfin_read_SIC_IMASK() | |
| (1 << BFIN_SYSIRQ(irq))); |
| #endif |
| hard_local_irq_restore(flags); |
| } |
| |
| #ifdef CONFIG_SMP |
| static void bfin_internal_unmask_irq_chip(struct irq_data *d) |
| { |
| bfin_internal_unmask_irq_affinity(d->irq, |
| irq_data_get_affinity_mask(d)); |
| } |
| |
| static int bfin_internal_set_affinity(struct irq_data *d, |
| const struct cpumask *mask, bool force) |
| { |
| bfin_internal_mask_irq(d->irq); |
| bfin_internal_unmask_irq_affinity(d->irq, mask); |
| |
| return 0; |
| } |
| #else |
| static void bfin_internal_unmask_irq_chip(struct irq_data *d) |
| { |
| bfin_internal_unmask_irq(d->irq); |
| } |
| #endif |
| |
| #if defined(CONFIG_PM) |
| int bfin_internal_set_wake(unsigned int irq, unsigned int state) |
| { |
| u32 bank, bit, wakeup = 0; |
| unsigned long flags; |
| bank = BFIN_SYSIRQ(irq) / 32; |
| bit = BFIN_SYSIRQ(irq) % 32; |
| |
| switch (irq) { |
| #ifdef IRQ_RTC |
| case IRQ_RTC: |
| wakeup |= WAKE; |
| break; |
| #endif |
| #ifdef IRQ_CAN0_RX |
| case IRQ_CAN0_RX: |
| wakeup |= CANWE; |
| break; |
| #endif |
| #ifdef IRQ_CAN1_RX |
| case IRQ_CAN1_RX: |
| wakeup |= CANWE; |
| break; |
| #endif |
| #ifdef IRQ_USB_INT0 |
| case IRQ_USB_INT0: |
| wakeup |= USBWE; |
| break; |
| #endif |
| #ifdef CONFIG_BF54x |
| case IRQ_CNT: |
| wakeup |= ROTWE; |
| break; |
| #endif |
| default: |
| break; |
| } |
| |
| flags = hard_local_irq_save(); |
| |
| if (state) { |
| bfin_sic_iwr[bank] |= (1 << bit); |
| vr_wakeup |= wakeup; |
| |
| } else { |
| bfin_sic_iwr[bank] &= ~(1 << bit); |
| vr_wakeup &= ~wakeup; |
| } |
| |
| hard_local_irq_restore(flags); |
| |
| return 0; |
| } |
| |
| static int bfin_internal_set_wake_chip(struct irq_data *d, unsigned int state) |
| { |
| return bfin_internal_set_wake(d->irq, state); |
| } |
| #else |
| inline int bfin_internal_set_wake(unsigned int irq, unsigned int state) |
| { |
| return 0; |
| } |
| # define bfin_internal_set_wake_chip NULL |
| #endif |
| |
| #else /* SEC_GCTL */ |
| static void bfin_sec_preflow_handler(struct irq_data *d) |
| { |
| unsigned long flags = hard_local_irq_save(); |
| unsigned int sid = BFIN_SYSIRQ(d->irq); |
| |
| bfin_write_SEC_SCI(0, SEC_CSID, sid); |
| |
| hard_local_irq_restore(flags); |
| } |
| |
| static void bfin_sec_mask_ack_irq(struct irq_data *d) |
| { |
| unsigned long flags = hard_local_irq_save(); |
| unsigned int sid = BFIN_SYSIRQ(d->irq); |
| |
| bfin_write_SEC_SCI(0, SEC_CSID, sid); |
| |
| hard_local_irq_restore(flags); |
| } |
| |
| static void bfin_sec_unmask_irq(struct irq_data *d) |
| { |
| unsigned long flags = hard_local_irq_save(); |
| unsigned int sid = BFIN_SYSIRQ(d->irq); |
| |
| bfin_write32(SEC_END, sid); |
| |
| hard_local_irq_restore(flags); |
| } |
| |
| static void bfin_sec_enable_ssi(unsigned int sid) |
| { |
| unsigned long flags = hard_local_irq_save(); |
| uint32_t reg_sctl = bfin_read_SEC_SCTL(sid); |
| |
| reg_sctl |= SEC_SCTL_SRC_EN; |
| bfin_write_SEC_SCTL(sid, reg_sctl); |
| |
| hard_local_irq_restore(flags); |
| } |
| |
| static void bfin_sec_disable_ssi(unsigned int sid) |
| { |
| unsigned long flags = hard_local_irq_save(); |
| uint32_t reg_sctl = bfin_read_SEC_SCTL(sid); |
| |
| reg_sctl &= ((uint32_t)~SEC_SCTL_SRC_EN); |
| bfin_write_SEC_SCTL(sid, reg_sctl); |
| |
| hard_local_irq_restore(flags); |
| } |
| |
| static void bfin_sec_set_ssi_coreid(unsigned int sid, unsigned int coreid) |
| { |
| unsigned long flags = hard_local_irq_save(); |
| uint32_t reg_sctl = bfin_read_SEC_SCTL(sid); |
| |
| reg_sctl &= ((uint32_t)~SEC_SCTL_CTG); |
| bfin_write_SEC_SCTL(sid, reg_sctl | ((coreid << 20) & SEC_SCTL_CTG)); |
| |
| hard_local_irq_restore(flags); |
| } |
| |
| static void bfin_sec_enable_sci(unsigned int sid) |
| { |
| unsigned long flags = hard_local_irq_save(); |
| uint32_t reg_sctl = bfin_read_SEC_SCTL(sid); |
| |
| if (sid == BFIN_SYSIRQ(IRQ_WATCH0)) |
| reg_sctl |= SEC_SCTL_FAULT_EN; |
| else |
| reg_sctl |= SEC_SCTL_INT_EN; |
| bfin_write_SEC_SCTL(sid, reg_sctl); |
| |
| hard_local_irq_restore(flags); |
| } |
| |
| static void bfin_sec_disable_sci(unsigned int sid) |
| { |
| unsigned long flags = hard_local_irq_save(); |
| uint32_t reg_sctl = bfin_read_SEC_SCTL(sid); |
| |
| reg_sctl &= ((uint32_t)~SEC_SCTL_INT_EN); |
| bfin_write_SEC_SCTL(sid, reg_sctl); |
| |
| hard_local_irq_restore(flags); |
| } |
| |
| static void bfin_sec_enable(struct irq_data *d) |
| { |
| unsigned long flags = hard_local_irq_save(); |
| unsigned int sid = BFIN_SYSIRQ(d->irq); |
| |
| bfin_sec_enable_sci(sid); |
| bfin_sec_enable_ssi(sid); |
| |
| hard_local_irq_restore(flags); |
| } |
| |
| static void bfin_sec_disable(struct irq_data *d) |
| { |
| unsigned long flags = hard_local_irq_save(); |
| unsigned int sid = BFIN_SYSIRQ(d->irq); |
| |
| bfin_sec_disable_sci(sid); |
| bfin_sec_disable_ssi(sid); |
| |
| hard_local_irq_restore(flags); |
| } |
| |
| static void bfin_sec_set_priority(unsigned int sec_int_levels, u8 *sec_int_priority) |
| { |
| unsigned long flags = hard_local_irq_save(); |
| uint32_t reg_sctl; |
| int i; |
| |
| bfin_write_SEC_SCI(0, SEC_CPLVL, sec_int_levels); |
| |
| for (i = 0; i < SYS_IRQS - BFIN_IRQ(0); i++) { |
| reg_sctl = bfin_read_SEC_SCTL(i) & ~SEC_SCTL_PRIO; |
| reg_sctl |= sec_int_priority[i] << SEC_SCTL_PRIO_OFFSET; |
| bfin_write_SEC_SCTL(i, reg_sctl); |
| } |
| |
| hard_local_irq_restore(flags); |
| } |
| |
| void bfin_sec_raise_irq(unsigned int irq) |
| { |
| unsigned long flags = hard_local_irq_save(); |
| unsigned int sid = BFIN_SYSIRQ(irq); |
| |
| bfin_write32(SEC_RAISE, sid); |
| |
| hard_local_irq_restore(flags); |
| } |
| |
| static void init_software_driven_irq(void) |
| { |
| bfin_sec_set_ssi_coreid(34, 0); |
| bfin_sec_set_ssi_coreid(35, 1); |
| |
| bfin_sec_enable_sci(35); |
| bfin_sec_enable_ssi(35); |
| bfin_sec_set_ssi_coreid(36, 0); |
| bfin_sec_set_ssi_coreid(37, 1); |
| bfin_sec_enable_sci(37); |
| bfin_sec_enable_ssi(37); |
| } |
| |
| void handle_sec_sfi_fault(uint32_t gstat) |
| { |
| |
| } |
| |
| void handle_sec_sci_fault(uint32_t gstat) |
| { |
| uint32_t core_id; |
| uint32_t cstat; |
| |
| core_id = gstat & SEC_GSTAT_SCI; |
| cstat = bfin_read_SEC_SCI(core_id, SEC_CSTAT); |
| if (cstat & SEC_CSTAT_ERR) { |
| switch (cstat & SEC_CSTAT_ERRC) { |
| case SEC_CSTAT_ACKERR: |
| printk(KERN_DEBUG "sec ack err\n"); |
| break; |
| default: |
| printk(KERN_DEBUG "sec sci unknown err\n"); |
| } |
| } |
| |
| } |
| |
| void handle_sec_ssi_fault(uint32_t gstat) |
| { |
| uint32_t sid; |
| uint32_t sstat; |
| |
| sid = gstat & SEC_GSTAT_SID; |
| sstat = bfin_read_SEC_SSTAT(sid); |
| |
| } |
| |
| void handle_sec_fault(uint32_t sec_gstat) |
| { |
| if (sec_gstat & SEC_GSTAT_ERR) { |
| |
| switch (sec_gstat & SEC_GSTAT_ERRC) { |
| case 0: |
| handle_sec_sfi_fault(sec_gstat); |
| break; |
| case SEC_GSTAT_SCIERR: |
| handle_sec_sci_fault(sec_gstat); |
| break; |
| case SEC_GSTAT_SSIERR: |
| handle_sec_ssi_fault(sec_gstat); |
| break; |
| } |
| |
| |
| } |
| } |
| |
| static struct irqaction bfin_fault_irq = { |
| .name = "Blackfin fault", |
| }; |
| |
| static irqreturn_t bfin_fault_routine(int irq, void *data) |
| { |
| struct pt_regs *fp = get_irq_regs(); |
| |
| switch (irq) { |
| case IRQ_C0_DBL_FAULT: |
| double_fault_c(fp); |
| break; |
| case IRQ_C0_HW_ERR: |
| dump_bfin_process(fp); |
| dump_bfin_mem(fp); |
| show_regs(fp); |
| printk(KERN_NOTICE "Kernel Stack\n"); |
| show_stack(current, NULL); |
| print_modules(); |
| panic("Core 0 hardware error"); |
| break; |
| case IRQ_C0_NMI_L1_PARITY_ERR: |
| panic("Core 0 NMI L1 parity error"); |
| break; |
| case IRQ_SEC_ERR: |
| pr_err("SEC error\n"); |
| handle_sec_fault(bfin_read32(SEC_GSTAT)); |
| break; |
| default: |
| panic("Unknown fault %d", irq); |
| } |
| |
| return IRQ_HANDLED; |
| } |
| #endif /* SEC_GCTL */ |
| |
| static struct irq_chip bfin_core_irqchip = { |
| .name = "CORE", |
| .irq_mask = bfin_core_mask_irq, |
| .irq_unmask = bfin_core_unmask_irq, |
| }; |
| |
| #ifndef SEC_GCTL |
| static struct irq_chip bfin_internal_irqchip = { |
| .name = "INTN", |
| .irq_mask = bfin_internal_mask_irq_chip, |
| .irq_unmask = bfin_internal_unmask_irq_chip, |
| .irq_disable = bfin_internal_mask_irq_chip, |
| .irq_enable = bfin_internal_unmask_irq_chip, |
| #ifdef CONFIG_SMP |
| .irq_set_affinity = bfin_internal_set_affinity, |
| #endif |
| .irq_set_wake = bfin_internal_set_wake_chip, |
| }; |
| #else |
| static struct irq_chip bfin_sec_irqchip = { |
| .name = "SEC", |
| .irq_mask_ack = bfin_sec_mask_ack_irq, |
| .irq_mask = bfin_sec_mask_ack_irq, |
| .irq_unmask = bfin_sec_unmask_irq, |
| .irq_eoi = bfin_sec_unmask_irq, |
| .irq_disable = bfin_sec_disable, |
| .irq_enable = bfin_sec_enable, |
| }; |
| #endif |
| |
| void bfin_handle_irq(unsigned irq) |
| { |
| #ifdef CONFIG_IPIPE |
| struct pt_regs regs; /* Contents not used. */ |
| ipipe_trace_irq_entry(irq); |
| __ipipe_handle_irq(irq, ®s); |
| ipipe_trace_irq_exit(irq); |
| #else /* !CONFIG_IPIPE */ |
| generic_handle_irq(irq); |
| #endif /* !CONFIG_IPIPE */ |
| } |
| |
| #if defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE) |
| static int mac_stat_int_mask; |
| |
| static void bfin_mac_status_ack_irq(unsigned int irq) |
| { |
| switch (irq) { |
| case IRQ_MAC_MMCINT: |
| bfin_write_EMAC_MMC_TIRQS( |
| bfin_read_EMAC_MMC_TIRQE() & |
| bfin_read_EMAC_MMC_TIRQS()); |
| bfin_write_EMAC_MMC_RIRQS( |
| bfin_read_EMAC_MMC_RIRQE() & |
| bfin_read_EMAC_MMC_RIRQS()); |
| break; |
| case IRQ_MAC_RXFSINT: |
| bfin_write_EMAC_RX_STKY( |
| bfin_read_EMAC_RX_IRQE() & |
| bfin_read_EMAC_RX_STKY()); |
| break; |
| case IRQ_MAC_TXFSINT: |
| bfin_write_EMAC_TX_STKY( |
| bfin_read_EMAC_TX_IRQE() & |
| bfin_read_EMAC_TX_STKY()); |
| break; |
| case IRQ_MAC_WAKEDET: |
| bfin_write_EMAC_WKUP_CTL( |
| bfin_read_EMAC_WKUP_CTL() | MPKS | RWKS); |
| break; |
| default: |
| /* These bits are W1C */ |
| bfin_write_EMAC_SYSTAT(1L << (irq - IRQ_MAC_PHYINT)); |
| break; |
| } |
| } |
| |
| static void bfin_mac_status_mask_irq(struct irq_data *d) |
| { |
| unsigned int irq = d->irq; |
| |
| mac_stat_int_mask &= ~(1L << (irq - IRQ_MAC_PHYINT)); |
| #ifdef BF537_FAMILY |
| switch (irq) { |
| case IRQ_MAC_PHYINT: |
| bfin_write_EMAC_SYSCTL(bfin_read_EMAC_SYSCTL() & ~PHYIE); |
| break; |
| default: |
| break; |
| } |
| #else |
| if (!mac_stat_int_mask) |
| bfin_internal_mask_irq(IRQ_MAC_ERROR); |
| #endif |
| bfin_mac_status_ack_irq(irq); |
| } |
| |
| static void bfin_mac_status_unmask_irq(struct irq_data *d) |
| { |
| unsigned int irq = d->irq; |
| |
| #ifdef BF537_FAMILY |
| switch (irq) { |
| case IRQ_MAC_PHYINT: |
| bfin_write_EMAC_SYSCTL(bfin_read_EMAC_SYSCTL() | PHYIE); |
| break; |
| default: |
| break; |
| } |
| #else |
| if (!mac_stat_int_mask) |
| bfin_internal_unmask_irq(IRQ_MAC_ERROR); |
| #endif |
| mac_stat_int_mask |= 1L << (irq - IRQ_MAC_PHYINT); |
| } |
| |
| #ifdef CONFIG_PM |
| int bfin_mac_status_set_wake(struct irq_data *d, unsigned int state) |
| { |
| #ifdef BF537_FAMILY |
| return bfin_internal_set_wake(IRQ_GENERIC_ERROR, state); |
| #else |
| return bfin_internal_set_wake(IRQ_MAC_ERROR, state); |
| #endif |
| } |
| #else |
| # define bfin_mac_status_set_wake NULL |
| #endif |
| |
| static struct irq_chip bfin_mac_status_irqchip = { |
| .name = "MACST", |
| .irq_mask = bfin_mac_status_mask_irq, |
| .irq_unmask = bfin_mac_status_unmask_irq, |
| .irq_set_wake = bfin_mac_status_set_wake, |
| }; |
| |
| void bfin_demux_mac_status_irq(unsigned int int_err_irq, |
| struct irq_desc *inta_desc) |
| { |
| int i, irq = 0; |
| u32 status = bfin_read_EMAC_SYSTAT(); |
| |
| for (i = 0; i <= (IRQ_MAC_STMDONE - IRQ_MAC_PHYINT); i++) |
| if (status & (1L << i)) { |
| irq = IRQ_MAC_PHYINT + i; |
| break; |
| } |
| |
| if (irq) { |
| if (mac_stat_int_mask & (1L << (irq - IRQ_MAC_PHYINT))) { |
| bfin_handle_irq(irq); |
| } else { |
| bfin_mac_status_ack_irq(irq); |
| pr_debug("IRQ %d:" |
| " MASKED MAC ERROR INTERRUPT ASSERTED\n", |
| irq); |
| } |
| } else |
| printk(KERN_ERR |
| "%s : %s : LINE %d :\nIRQ ?: MAC ERROR" |
| " INTERRUPT ASSERTED BUT NO SOURCE FOUND" |
| "(EMAC_SYSTAT=0x%X)\n", |
| __func__, __FILE__, __LINE__, status); |
| } |
| #endif |
| |
| static inline void bfin_set_irq_handler(struct irq_data *d, irq_flow_handler_t handle) |
| { |
| #ifdef CONFIG_IPIPE |
| handle = handle_level_irq; |
| #endif |
| irq_set_handler_locked(d, handle); |
| } |
| |
| #ifdef CONFIG_GPIO_ADI |
| |
| static DECLARE_BITMAP(gpio_enabled, MAX_BLACKFIN_GPIOS); |
| |
| static void bfin_gpio_ack_irq(struct irq_data *d) |
| { |
| /* AFAIK ack_irq in case mask_ack is provided |
| * get's only called for edge sense irqs |
| */ |
| set_gpio_data(irq_to_gpio(d->irq), 0); |
| } |
| |
| static void bfin_gpio_mask_ack_irq(struct irq_data *d) |
| { |
| unsigned int irq = d->irq; |
| u32 gpionr = irq_to_gpio(irq); |
| |
| if (!irqd_is_level_type(d)) |
| set_gpio_data(gpionr, 0); |
| |
| set_gpio_maska(gpionr, 0); |
| } |
| |
| static void bfin_gpio_mask_irq(struct irq_data *d) |
| { |
| set_gpio_maska(irq_to_gpio(d->irq), 0); |
| } |
| |
| static void bfin_gpio_unmask_irq(struct irq_data *d) |
| { |
| set_gpio_maska(irq_to_gpio(d->irq), 1); |
| } |
| |
| static unsigned int bfin_gpio_irq_startup(struct irq_data *d) |
| { |
| u32 gpionr = irq_to_gpio(d->irq); |
| |
| if (__test_and_set_bit(gpionr, gpio_enabled)) |
| bfin_gpio_irq_prepare(gpionr); |
| |
| bfin_gpio_unmask_irq(d); |
| |
| return 0; |
| } |
| |
| static void bfin_gpio_irq_shutdown(struct irq_data *d) |
| { |
| u32 gpionr = irq_to_gpio(d->irq); |
| |
| bfin_gpio_mask_irq(d); |
| __clear_bit(gpionr, gpio_enabled); |
| bfin_gpio_irq_free(gpionr); |
| } |
| |
| static int bfin_gpio_irq_type(struct irq_data *d, unsigned int type) |
| { |
| unsigned int irq = d->irq; |
| int ret; |
| char buf[16]; |
| u32 gpionr = irq_to_gpio(irq); |
| |
| if (type == IRQ_TYPE_PROBE) { |
| /* only probe unenabled GPIO interrupt lines */ |
| if (test_bit(gpionr, gpio_enabled)) |
| return 0; |
| type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING; |
| } |
| |
| if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING | |
| IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) { |
| |
| snprintf(buf, 16, "gpio-irq%d", irq); |
| ret = bfin_gpio_irq_request(gpionr, buf); |
| if (ret) |
| return ret; |
| |
| if (__test_and_set_bit(gpionr, gpio_enabled)) |
| bfin_gpio_irq_prepare(gpionr); |
| |
| } else { |
| __clear_bit(gpionr, gpio_enabled); |
| return 0; |
| } |
| |
| set_gpio_inen(gpionr, 0); |
| set_gpio_dir(gpionr, 0); |
| |
| if ((type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) |
| == (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) |
| set_gpio_both(gpionr, 1); |
| else |
| set_gpio_both(gpionr, 0); |
| |
| if ((type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_LEVEL_LOW))) |
| set_gpio_polar(gpionr, 1); /* low or falling edge denoted by one */ |
| else |
| set_gpio_polar(gpionr, 0); /* high or rising edge denoted by zero */ |
| |
| if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) { |
| set_gpio_edge(gpionr, 1); |
| set_gpio_inen(gpionr, 1); |
| set_gpio_data(gpionr, 0); |
| |
| } else { |
| set_gpio_edge(gpionr, 0); |
| set_gpio_inen(gpionr, 1); |
| } |
| |
| if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) |
| bfin_set_irq_handler(d, handle_edge_irq); |
| else |
| bfin_set_irq_handler(d, handle_level_irq); |
| |
| return 0; |
| } |
| |
| static void bfin_demux_gpio_block(unsigned int irq) |
| { |
| unsigned int gpio, mask; |
| |
| gpio = irq_to_gpio(irq); |
| mask = get_gpiop_data(gpio) & get_gpiop_maska(gpio); |
| |
| while (mask) { |
| if (mask & 1) |
| bfin_handle_irq(irq); |
| irq++; |
| mask >>= 1; |
| } |
| } |
| |
| void bfin_demux_gpio_irq(unsigned int __inta_irq, struct irq_desc *desc) |
| { |
| unsigned int inta_irq = irq_desc_get_irq(desc); |
| unsigned int irq; |
| |
| switch (inta_irq) { |
| #if defined(BF537_FAMILY) |
| case IRQ_PF_INTA_PG_INTA: |
| bfin_demux_gpio_block(IRQ_PF0); |
| irq = IRQ_PG0; |
| break; |
| case IRQ_PH_INTA_MAC_RX: |
| irq = IRQ_PH0; |
| break; |
| #elif defined(BF533_FAMILY) |
| case IRQ_PROG_INTA: |
| irq = IRQ_PF0; |
| break; |
| #elif defined(BF538_FAMILY) |
| case IRQ_PORTF_INTA: |
| irq = IRQ_PF0; |
| break; |
| #elif defined(CONFIG_BF52x) || defined(CONFIG_BF51x) |
| case IRQ_PORTF_INTA: |
| irq = IRQ_PF0; |
| break; |
| case IRQ_PORTG_INTA: |
| irq = IRQ_PG0; |
| break; |
| case IRQ_PORTH_INTA: |
| irq = IRQ_PH0; |
| break; |
| #elif defined(CONFIG_BF561) |
| case IRQ_PROG0_INTA: |
| irq = IRQ_PF0; |
| break; |
| case IRQ_PROG1_INTA: |
| irq = IRQ_PF16; |
| break; |
| case IRQ_PROG2_INTA: |
| irq = IRQ_PF32; |
| break; |
| #endif |
| default: |
| BUG(); |
| return; |
| } |
| |
| bfin_demux_gpio_block(irq); |
| } |
| |
| #ifdef CONFIG_PM |
| |
| static int bfin_gpio_set_wake(struct irq_data *d, unsigned int state) |
| { |
| return bfin_gpio_pm_wakeup_ctrl(irq_to_gpio(d->irq), state); |
| } |
| |
| #else |
| |
| # define bfin_gpio_set_wake NULL |
| |
| #endif |
| |
| static struct irq_chip bfin_gpio_irqchip = { |
| .name = "GPIO", |
| .irq_ack = bfin_gpio_ack_irq, |
| .irq_mask = bfin_gpio_mask_irq, |
| .irq_mask_ack = bfin_gpio_mask_ack_irq, |
| .irq_unmask = bfin_gpio_unmask_irq, |
| .irq_disable = bfin_gpio_mask_irq, |
| .irq_enable = bfin_gpio_unmask_irq, |
| .irq_set_type = bfin_gpio_irq_type, |
| .irq_startup = bfin_gpio_irq_startup, |
| .irq_shutdown = bfin_gpio_irq_shutdown, |
| .irq_set_wake = bfin_gpio_set_wake, |
| }; |
| |
| #endif |
| |
| #ifdef CONFIG_PM |
| |
| #ifdef SEC_GCTL |
| static u32 save_pint_sec_ctl[NR_PINT_SYS_IRQS]; |
| |
| static int sec_suspend(void) |
| { |
| u32 bank; |
| |
| for (bank = 0; bank < NR_PINT_SYS_IRQS; bank++) |
| save_pint_sec_ctl[bank] = bfin_read_SEC_SCTL(bank + BFIN_SYSIRQ(IRQ_PINT0)); |
| return 0; |
| } |
| |
| static void sec_resume(void) |
| { |
| u32 bank; |
| |
| bfin_write_SEC_SCI(0, SEC_CCTL, SEC_CCTL_RESET); |
| udelay(100); |
| bfin_write_SEC_GCTL(SEC_GCTL_EN); |
| bfin_write_SEC_SCI(0, SEC_CCTL, SEC_CCTL_EN | SEC_CCTL_NMI_EN); |
| |
| for (bank = 0; bank < NR_PINT_SYS_IRQS; bank++) |
| bfin_write_SEC_SCTL(bank + BFIN_SYSIRQ(IRQ_PINT0), save_pint_sec_ctl[bank]); |
| } |
| |
| static struct syscore_ops sec_pm_syscore_ops = { |
| .suspend = sec_suspend, |
| .resume = sec_resume, |
| }; |
| #endif |
| |
| #endif |
| |
| void init_exception_vectors(void) |
| { |
| /* cannot program in software: |
| * evt0 - emulation (jtag) |
| * evt1 - reset |
| */ |
| bfin_write_EVT2(evt_nmi); |
| bfin_write_EVT3(trap); |
| bfin_write_EVT5(evt_ivhw); |
| bfin_write_EVT6(evt_timer); |
| bfin_write_EVT7(evt_evt7); |
| bfin_write_EVT8(evt_evt8); |
| bfin_write_EVT9(evt_evt9); |
| bfin_write_EVT10(evt_evt10); |
| bfin_write_EVT11(evt_evt11); |
| bfin_write_EVT12(evt_evt12); |
| bfin_write_EVT13(evt_evt13); |
| bfin_write_EVT14(evt_evt14); |
| bfin_write_EVT15(evt_system_call); |
| CSYNC(); |
| } |
| |
| #ifndef SEC_GCTL |
| /* |
| * This function should be called during kernel startup to initialize |
| * the BFin IRQ handling routines. |
| */ |
| |
| int __init init_arch_irq(void) |
| { |
| int irq; |
| unsigned long ilat = 0; |
| |
| /* Disable all the peripheral intrs - page 4-29 HW Ref manual */ |
| #ifdef SIC_IMASK0 |
| bfin_write_SIC_IMASK0(SIC_UNMASK_ALL); |
| bfin_write_SIC_IMASK1(SIC_UNMASK_ALL); |
| # ifdef SIC_IMASK2 |
| bfin_write_SIC_IMASK2(SIC_UNMASK_ALL); |
| # endif |
| # if defined(CONFIG_SMP) || defined(CONFIG_ICC) |
| bfin_write_SICB_IMASK0(SIC_UNMASK_ALL); |
| bfin_write_SICB_IMASK1(SIC_UNMASK_ALL); |
| # endif |
| #else |
| bfin_write_SIC_IMASK(SIC_UNMASK_ALL); |
| #endif |
| |
| local_irq_disable(); |
| |
| for (irq = 0; irq <= SYS_IRQS; irq++) { |
| if (irq <= IRQ_CORETMR) |
| irq_set_chip(irq, &bfin_core_irqchip); |
| else |
| irq_set_chip(irq, &bfin_internal_irqchip); |
| |
| switch (irq) { |
| #if !BFIN_GPIO_PINT |
| #if defined(BF537_FAMILY) |
| case IRQ_PH_INTA_MAC_RX: |
| case IRQ_PF_INTA_PG_INTA: |
| #elif defined(BF533_FAMILY) |
| case IRQ_PROG_INTA: |
| #elif defined(CONFIG_BF52x) || defined(CONFIG_BF51x) |
| case IRQ_PORTF_INTA: |
| case IRQ_PORTG_INTA: |
| case IRQ_PORTH_INTA: |
| #elif defined(CONFIG_BF561) |
| case IRQ_PROG0_INTA: |
| case IRQ_PROG1_INTA: |
| case IRQ_PROG2_INTA: |
| #elif defined(BF538_FAMILY) |
| case IRQ_PORTF_INTA: |
| #endif |
| irq_set_chained_handler(irq, bfin_demux_gpio_irq); |
| break; |
| #endif |
| #if defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE) |
| case IRQ_MAC_ERROR: |
| irq_set_chained_handler(irq, |
| bfin_demux_mac_status_irq); |
| break; |
| #endif |
| #if defined(CONFIG_SMP) || defined(CONFIG_ICC) |
| case IRQ_SUPPLE_0: |
| case IRQ_SUPPLE_1: |
| irq_set_handler(irq, handle_percpu_irq); |
| break; |
| #endif |
| |
| #ifdef CONFIG_TICKSOURCE_CORETMR |
| case IRQ_CORETMR: |
| # ifdef CONFIG_SMP |
| irq_set_handler(irq, handle_percpu_irq); |
| # else |
| irq_set_handler(irq, handle_simple_irq); |
| # endif |
| break; |
| #endif |
| |
| #ifdef CONFIG_TICKSOURCE_GPTMR0 |
| case IRQ_TIMER0: |
| irq_set_handler(irq, handle_simple_irq); |
| break; |
| #endif |
| |
| default: |
| #ifdef CONFIG_IPIPE |
| irq_set_handler(irq, handle_level_irq); |
| #else |
| irq_set_handler(irq, handle_simple_irq); |
| #endif |
| break; |
| } |
| } |
| |
| init_mach_irq(); |
| |
| #if (defined(CONFIG_BFIN_MAC) || defined(CONFIG_BFIN_MAC_MODULE)) |
| for (irq = IRQ_MAC_PHYINT; irq <= IRQ_MAC_STMDONE; irq++) |
| irq_set_chip_and_handler(irq, &bfin_mac_status_irqchip, |
| handle_level_irq); |
| #endif |
| /* if configured as edge, then will be changed to do_edge_IRQ */ |
| #ifdef CONFIG_GPIO_ADI |
| for (irq = GPIO_IRQ_BASE; |
| irq < (GPIO_IRQ_BASE + MAX_BLACKFIN_GPIOS); irq++) |
| irq_set_chip_and_handler(irq, &bfin_gpio_irqchip, |
| handle_level_irq); |
| #endif |
| bfin_write_IMASK(0); |
| CSYNC(); |
| ilat = bfin_read_ILAT(); |
| CSYNC(); |
| bfin_write_ILAT(ilat); |
| CSYNC(); |
| |
| printk(KERN_INFO "Configuring Blackfin Priority Driven Interrupts\n"); |
| /* IMASK=xxx is equivalent to STI xx or bfin_irq_flags=xx, |
| * local_irq_enable() |
| */ |
| program_IAR(); |
| /* Therefore it's better to setup IARs before interrupts enabled */ |
| search_IAR(); |
| |
| /* Enable interrupts IVG7-15 */ |
| bfin_irq_flags |= IMASK_IVG15 | |
| IMASK_IVG14 | IMASK_IVG13 | IMASK_IVG12 | IMASK_IVG11 | |
| IMASK_IVG10 | IMASK_IVG9 | IMASK_IVG8 | IMASK_IVG7 | IMASK_IVGHW; |
| |
| |
| /* This implicitly covers ANOMALY_05000171 |
| * Boot-ROM code modifies SICA_IWRx wakeup registers |
| */ |
| #ifdef SIC_IWR0 |
| bfin_write_SIC_IWR0(IWR_DISABLE_ALL); |
| # ifdef SIC_IWR1 |
| /* BF52x/BF51x system reset does not properly reset SIC_IWR1 which |
| * will screw up the bootrom as it relies on MDMA0/1 waking it |
| * up from IDLE instructions. See this report for more info: |
| * http://blackfin.uclinux.org/gf/tracker/4323 |
| */ |
| if (ANOMALY_05000435) |
| bfin_write_SIC_IWR1(IWR_ENABLE(10) | IWR_ENABLE(11)); |
| else |
| bfin_write_SIC_IWR1(IWR_DISABLE_ALL); |
| # endif |
| # ifdef SIC_IWR2 |
| bfin_write_SIC_IWR2(IWR_DISABLE_ALL); |
| # endif |
| #else |
| bfin_write_SIC_IWR(IWR_DISABLE_ALL); |
| #endif |
| return 0; |
| } |
| |
| #ifdef CONFIG_DO_IRQ_L1 |
| __attribute__((l1_text)) |
| #endif |
| static int vec_to_irq(int vec) |
| { |
| struct ivgx *ivg = ivg7_13[vec - IVG7].ifirst; |
| struct ivgx *ivg_stop = ivg7_13[vec - IVG7].istop; |
| unsigned long sic_status[3]; |
| if (likely(vec == EVT_IVTMR_P)) |
| return IRQ_CORETMR; |
| #ifdef SIC_ISR |
| sic_status[0] = bfin_read_SIC_IMASK() & bfin_read_SIC_ISR(); |
| #else |
| if (smp_processor_id()) { |
| # ifdef SICB_ISR0 |
| /* This will be optimized out in UP mode. */ |
| sic_status[0] = bfin_read_SICB_ISR0() & bfin_read_SICB_IMASK0(); |
| sic_status[1] = bfin_read_SICB_ISR1() & bfin_read_SICB_IMASK1(); |
| # endif |
| } else { |
| sic_status[0] = bfin_read_SIC_ISR0() & bfin_read_SIC_IMASK0(); |
| sic_status[1] = bfin_read_SIC_ISR1() & bfin_read_SIC_IMASK1(); |
| } |
| #endif |
| #ifdef SIC_ISR2 |
| sic_status[2] = bfin_read_SIC_ISR2() & bfin_read_SIC_IMASK2(); |
| #endif |
| |
| for (;; ivg++) { |
| if (ivg >= ivg_stop) |
| return -1; |
| #ifdef SIC_ISR |
| if (sic_status[0] & ivg->isrflag) |
| #else |
| if (sic_status[(ivg->irqno - IVG7) / 32] & ivg->isrflag) |
| #endif |
| return ivg->irqno; |
| } |
| } |
| |
| #else /* SEC_GCTL */ |
| |
| /* |
| * This function should be called during kernel startup to initialize |
| * the BFin IRQ handling routines. |
| */ |
| |
| int __init init_arch_irq(void) |
| { |
| int irq; |
| unsigned long ilat = 0; |
| |
| bfin_write_SEC_GCTL(SEC_GCTL_RESET); |
| |
| local_irq_disable(); |
| |
| for (irq = 0; irq <= SYS_IRQS; irq++) { |
| if (irq <= IRQ_CORETMR) { |
| irq_set_chip_and_handler(irq, &bfin_core_irqchip, |
| handle_simple_irq); |
| #if defined(CONFIG_TICKSOURCE_CORETMR) && defined(CONFIG_SMP) |
| if (irq == IRQ_CORETMR) |
| irq_set_handler(irq, handle_percpu_irq); |
| #endif |
| } else if (irq >= BFIN_IRQ(34) && irq <= BFIN_IRQ(37)) { |
| irq_set_chip_and_handler(irq, &bfin_sec_irqchip, |
| handle_percpu_irq); |
| } else { |
| irq_set_chip(irq, &bfin_sec_irqchip); |
| irq_set_handler(irq, handle_fasteoi_irq); |
| __irq_set_preflow_handler(irq, bfin_sec_preflow_handler); |
| } |
| } |
| |
| bfin_write_IMASK(0); |
| CSYNC(); |
| ilat = bfin_read_ILAT(); |
| CSYNC(); |
| bfin_write_ILAT(ilat); |
| CSYNC(); |
| |
| printk(KERN_INFO "Configuring Blackfin Priority Driven Interrupts\n"); |
| |
| bfin_sec_set_priority(CONFIG_SEC_IRQ_PRIORITY_LEVELS, sec_int_priority); |
| |
| /* Enable interrupts IVG7-15 */ |
| bfin_irq_flags |= IMASK_IVG15 | |
| IMASK_IVG14 | IMASK_IVG13 | IMASK_IVG12 | IMASK_IVG11 | |
| IMASK_IVG10 | IMASK_IVG9 | IMASK_IVG8 | IMASK_IVG7 | IMASK_IVGHW; |
| |
| |
| bfin_write_SEC_FCTL(SEC_FCTL_EN | SEC_FCTL_SYSRST_EN | SEC_FCTL_FLTIN_EN); |
| bfin_sec_enable_sci(BFIN_SYSIRQ(IRQ_WATCH0)); |
| bfin_sec_enable_ssi(BFIN_SYSIRQ(IRQ_WATCH0)); |
| bfin_write_SEC_SCI(0, SEC_CCTL, SEC_CCTL_RESET); |
| udelay(100); |
| bfin_write_SEC_GCTL(SEC_GCTL_EN); |
| bfin_write_SEC_SCI(0, SEC_CCTL, SEC_CCTL_EN | SEC_CCTL_NMI_EN); |
| bfin_write_SEC_SCI(1, SEC_CCTL, SEC_CCTL_EN | SEC_CCTL_NMI_EN); |
| |
| init_software_driven_irq(); |
| |
| #ifdef CONFIG_PM |
| register_syscore_ops(&sec_pm_syscore_ops); |
| #endif |
| |
| bfin_fault_irq.handler = bfin_fault_routine; |
| #ifdef CONFIG_L1_PARITY_CHECK |
| setup_irq(IRQ_C0_NMI_L1_PARITY_ERR, &bfin_fault_irq); |
| #endif |
| setup_irq(IRQ_C0_DBL_FAULT, &bfin_fault_irq); |
| setup_irq(IRQ_SEC_ERR, &bfin_fault_irq); |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_DO_IRQ_L1 |
| __attribute__((l1_text)) |
| #endif |
| static int vec_to_irq(int vec) |
| { |
| if (likely(vec == EVT_IVTMR_P)) |
| return IRQ_CORETMR; |
| |
| return BFIN_IRQ(bfin_read_SEC_SCI(0, SEC_CSID)); |
| } |
| #endif /* SEC_GCTL */ |
| |
| #ifdef CONFIG_DO_IRQ_L1 |
| __attribute__((l1_text)) |
| #endif |
| void do_irq(int vec, struct pt_regs *fp) |
| { |
| int irq = vec_to_irq(vec); |
| if (irq == -1) |
| return; |
| asm_do_IRQ(irq, fp); |
| } |
| |
| #ifdef CONFIG_IPIPE |
| |
| int __ipipe_get_irq_priority(unsigned irq) |
| { |
| int ient, prio; |
| |
| if (irq <= IRQ_CORETMR) |
| return irq; |
| |
| #ifdef SEC_GCTL |
| if (irq >= BFIN_IRQ(0)) |
| return IVG11; |
| #else |
| for (ient = 0; ient < NR_PERI_INTS; ient++) { |
| struct ivgx *ivg = ivg_table + ient; |
| if (ivg->irqno == irq) { |
| for (prio = 0; prio <= IVG13-IVG7; prio++) { |
| if (ivg7_13[prio].ifirst <= ivg && |
| ivg7_13[prio].istop > ivg) |
| return IVG7 + prio; |
| } |
| } |
| } |
| #endif |
| |
| return IVG15; |
| } |
| |
| /* Hw interrupts are disabled on entry (check SAVE_CONTEXT). */ |
| #ifdef CONFIG_DO_IRQ_L1 |
| __attribute__((l1_text)) |
| #endif |
| asmlinkage int __ipipe_grab_irq(int vec, struct pt_regs *regs) |
| { |
| struct ipipe_percpu_domain_data *p = ipipe_root_cpudom_ptr(); |
| struct ipipe_domain *this_domain = __ipipe_current_domain; |
| int irq, s = 0; |
| |
| irq = vec_to_irq(vec); |
| if (irq == -1) |
| return 0; |
| |
| if (irq == IRQ_SYSTMR) { |
| #if !defined(CONFIG_GENERIC_CLOCKEVENTS) || defined(CONFIG_TICKSOURCE_GPTMR0) |
| bfin_write_TIMER_STATUS(1); /* Latch TIMIL0 */ |
| #endif |
| /* This is basically what we need from the register frame. */ |
| __this_cpu_write(__ipipe_tick_regs.ipend, regs->ipend); |
| __this_cpu_write(__ipipe_tick_regs.pc, regs->pc); |
| if (this_domain != ipipe_root_domain) |
| __this_cpu_and(__ipipe_tick_regs.ipend, ~0x10); |
| else |
| __this_cpu_or(__ipipe_tick_regs.ipend, 0x10); |
| } |
| |
| /* |
| * We don't want Linux interrupt handlers to run at the |
| * current core priority level (i.e. < EVT15), since this |
| * might delay other interrupts handled by a high priority |
| * domain. Here is what we do instead: |
| * |
| * - we raise the SYNCDEFER bit to prevent |
| * __ipipe_handle_irq() to sync the pipeline for the root |
| * stage for the incoming interrupt. Upon return, that IRQ is |
| * pending in the interrupt log. |
| * |
| * - we raise the TIF_IRQ_SYNC bit for the current thread, so |
| * that _schedule_and_signal_from_int will eventually sync the |
| * pipeline from EVT15. |
| */ |
| if (this_domain == ipipe_root_domain) { |
| s = __test_and_set_bit(IPIPE_SYNCDEFER_FLAG, &p->status); |
| barrier(); |
| } |
| |
| ipipe_trace_irq_entry(irq); |
| __ipipe_handle_irq(irq, regs); |
| ipipe_trace_irq_exit(irq); |
| |
| if (user_mode(regs) && |
| !ipipe_test_foreign_stack() && |
| (current->ipipe_flags & PF_EVTRET) != 0) { |
| /* |
| * Testing for user_regs() does NOT fully eliminate |
| * foreign stack contexts, because of the forged |
| * interrupt returns we do through |
| * __ipipe_call_irqtail. In that case, we might have |
| * preempted a foreign stack context in a high |
| * priority domain, with a single interrupt level now |
| * pending after the irqtail unwinding is done. In |
| * which case user_mode() is now true, and the event |
| * gets dispatched spuriously. |
| */ |
| current->ipipe_flags &= ~PF_EVTRET; |
| __ipipe_dispatch_event(IPIPE_EVENT_RETURN, regs); |
| } |
| |
| if (this_domain == ipipe_root_domain) { |
| set_thread_flag(TIF_IRQ_SYNC); |
| if (!s) { |
| __clear_bit(IPIPE_SYNCDEFER_FLAG, &p->status); |
| return !test_bit(IPIPE_STALL_FLAG, &p->status); |
| } |
| } |
| |
| return 0; |
| } |
| |
| #endif /* CONFIG_IPIPE */ |