arch/m68k/coldfire/intc-5272.c
Source file repositories/reference/linux-study-clean/arch/m68k/coldfire/intc-5272.c
File Facts
- System
- Linux kernel
- Corpus path
arch/m68k/coldfire/intc-5272.c- Extension
.c- Size
- 6032 bytes
- Lines
- 186
- Domain
- Architecture Layer
- Bucket
- arch/m68k
- Inferred role
- Architecture Layer: implementation source
- Status
- source implementation candidate
Why This File Exists
CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
- CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/types.hlinux/init.hlinux/kernel.hlinux/interrupt.hlinux/kernel_stat.hlinux/irq.hlinux/io.hasm/coldfire.hasm/mcfsim.hasm/traps.h
Detected Declarations
struct irqmapfunction irqfunction intc_irq_unmaskfunction intc_irq_ackfunction intc_irq_set_typefunction intc_external_irqfunction init_IRQ
Annotated Snippet
struct irqmap {
unsigned int icr;
unsigned char index;
unsigned char ack;
};
static struct irqmap intc_irqmap[MCFINT_VECMAX - MCFINT_VECBASE] = {
/*MCF_IRQ_SPURIOUS*/ { .icr = 0, .index = 0, .ack = 0, },
/*MCF_IRQ_EINT1*/ { .icr = MCFSIM_ICR1, .index = 28, .ack = 1, },
/*MCF_IRQ_EINT2*/ { .icr = MCFSIM_ICR1, .index = 24, .ack = 1, },
/*MCF_IRQ_EINT3*/ { .icr = MCFSIM_ICR1, .index = 20, .ack = 1, },
/*MCF_IRQ_EINT4*/ { .icr = MCFSIM_ICR1, .index = 16, .ack = 1, },
/*MCF_IRQ_TIMER1*/ { .icr = MCFSIM_ICR1, .index = 12, .ack = 0, },
/*MCF_IRQ_TIMER2*/ { .icr = MCFSIM_ICR1, .index = 8, .ack = 0, },
/*MCF_IRQ_TIMER3*/ { .icr = MCFSIM_ICR1, .index = 4, .ack = 0, },
/*MCF_IRQ_TIMER4*/ { .icr = MCFSIM_ICR1, .index = 0, .ack = 0, },
/*MCF_IRQ_UART1*/ { .icr = MCFSIM_ICR2, .index = 28, .ack = 0, },
/*MCF_IRQ_UART2*/ { .icr = MCFSIM_ICR2, .index = 24, .ack = 0, },
/*MCF_IRQ_PLIP*/ { .icr = MCFSIM_ICR2, .index = 20, .ack = 0, },
/*MCF_IRQ_PLIA*/ { .icr = MCFSIM_ICR2, .index = 16, .ack = 0, },
/*MCF_IRQ_USB0*/ { .icr = MCFSIM_ICR2, .index = 12, .ack = 0, },
/*MCF_IRQ_USB1*/ { .icr = MCFSIM_ICR2, .index = 8, .ack = 0, },
/*MCF_IRQ_USB2*/ { .icr = MCFSIM_ICR2, .index = 4, .ack = 0, },
/*MCF_IRQ_USB3*/ { .icr = MCFSIM_ICR2, .index = 0, .ack = 0, },
/*MCF_IRQ_USB4*/ { .icr = MCFSIM_ICR3, .index = 28, .ack = 0, },
/*MCF_IRQ_USB5*/ { .icr = MCFSIM_ICR3, .index = 24, .ack = 0, },
/*MCF_IRQ_USB6*/ { .icr = MCFSIM_ICR3, .index = 20, .ack = 0, },
/*MCF_IRQ_USB7*/ { .icr = MCFSIM_ICR3, .index = 16, .ack = 0, },
/*MCF_IRQ_DMA*/ { .icr = MCFSIM_ICR3, .index = 12, .ack = 0, },
/*MCF_IRQ_ERX*/ { .icr = MCFSIM_ICR3, .index = 8, .ack = 0, },
/*MCF_IRQ_ETX*/ { .icr = MCFSIM_ICR3, .index = 4, .ack = 0, },
/*MCF_IRQ_ENTC*/ { .icr = MCFSIM_ICR3, .index = 0, .ack = 0, },
/*MCF_IRQ_QSPI*/ { .icr = MCFSIM_ICR4, .index = 28, .ack = 0, },
/*MCF_IRQ_EINT5*/ { .icr = MCFSIM_ICR4, .index = 24, .ack = 1, },
/*MCF_IRQ_EINT6*/ { .icr = MCFSIM_ICR4, .index = 20, .ack = 1, },
/*MCF_IRQ_SWTO*/ { .icr = MCFSIM_ICR4, .index = 16, .ack = 0, },
};
/*
* The act of masking the interrupt also has a side effect of 'ack'ing
* an interrupt on this irq (for the external irqs). So this mask function
* is also an ack_mask function.
*/
static void intc_irq_mask(struct irq_data *d)
{
unsigned int irq = d->irq;
if ((irq >= MCFINT_VECBASE) && (irq <= MCFINT_VECMAX)) {
u32 v;
irq -= MCFINT_VECBASE;
v = 0x8 << intc_irqmap[irq].index;
mcf_write32(v, intc_irqmap[irq].icr);
}
}
static void intc_irq_unmask(struct irq_data *d)
{
unsigned int irq = d->irq;
if ((irq >= MCFINT_VECBASE) && (irq <= MCFINT_VECMAX)) {
u32 v;
irq -= MCFINT_VECBASE;
v = 0xd << intc_irqmap[irq].index;
mcf_write32(v, intc_irqmap[irq].icr);
}
}
static void intc_irq_ack(struct irq_data *d)
{
unsigned int irq = d->irq;
/* Only external interrupts are acked */
if ((irq >= MCFINT_VECBASE) && (irq <= MCFINT_VECMAX)) {
irq -= MCFINT_VECBASE;
if (intc_irqmap[irq].ack) {
u32 v;
v = mcf_read32(intc_irqmap[irq].icr);
v &= (0x7 << intc_irqmap[irq].index);
v |= (0x8 << intc_irqmap[irq].index);
mcf_write32(v, intc_irqmap[irq].icr);
}
}
}
static int intc_irq_set_type(struct irq_data *d, unsigned int type)
{
unsigned int irq = d->irq;
if ((irq >= MCFINT_VECBASE) && (irq <= MCFINT_VECMAX)) {
irq -= MCFINT_VECBASE;
Annotation
- Immediate include surface: `linux/types.h`, `linux/init.h`, `linux/kernel.h`, `linux/interrupt.h`, `linux/kernel_stat.h`, `linux/irq.h`, `linux/io.h`, `asm/coldfire.h`.
- Detected declarations: `struct irqmap`, `function irq`, `function intc_irq_unmask`, `function intc_irq_ack`, `function intc_irq_set_type`, `function intc_external_irq`, `function init_IRQ`.
- Atlas domain: Architecture Layer / arch/m68k.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.