arch/sparc/include/asm/setup.h

File Facts

System

Linux kernel

Corpus path

arch/sparc/include/asm/setup.h

Extension

.h

Size

1478 bytes

Lines

71

Domain

Architecture Layer

Bucket

arch/sparc

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.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Touches IRQ or DMA behavior; this matters for the representative real-device path.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/interrupt.h
• uapi/asm/setup.h

Detected Declarations

• function con_is_present

Annotated Snippet

#ifndef _SPARC_SETUP_H
#define _SPARC_SETUP_H

#include <linux/interrupt.h>

#include <uapi/asm/setup.h>

extern char reboot_command[];

#ifdef CONFIG_SPARC32
/* The CPU that was used for booting
 * Only sun4d + leon may have boot_cpu_id != 0
 */
extern unsigned char boot_cpu_id;

extern int serial_console;
static inline int con_is_present(void)
{
	return serial_console ? 0 : 1;
}

/* from irq_32.c */
extern volatile unsigned char *fdc_status;
extern char *pdma_vaddr;
extern unsigned long pdma_size;
extern volatile int doing_pdma;

/* This is software state */
extern char *pdma_base;
extern unsigned long pdma_areasize;

int sparc_floppy_request_irq(unsigned int irq, irq_handler_t irq_handler);

/* setup_32.c */
extern unsigned long cmdline_memory_size;

/* devices.c */
void __init device_scan(void);

/* unaligned_32.c */
unsigned long safe_compute_effective_address(struct pt_regs *, unsigned int);

#endif

#ifdef CONFIG_SPARC64
void __init start_early_boot(void);

/* unaligned_64.c */
int handle_ldf_stq(u32 insn, struct pt_regs *regs);
void handle_ld_nf(u32 insn, struct pt_regs *regs);

/* init_64.c */
extern atomic_t dcpage_flushes;
extern atomic_t dcpage_flushes_xcall;

extern int sysctl_tsb_ratio;

#ifdef CONFIG_SERIAL_SUNHV
void sunhv_migrate_hvcons_irq(int cpu);
#endif
#endif
void sun_do_break(void);
extern int stop_a_enabled;
extern int scons_pwroff;

#endif /* _SPARC_SETUP_H */

Annotation

• Immediate include surface: `linux/interrupt.h`, `uapi/asm/setup.h`.
• Detected declarations: `function con_is_present`.
• Atlas domain: Architecture Layer / arch/sparc.
• Implementation status: source implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.
• IRQ or DMA behavior appears here, which is relevant to the selected PCIe/NVMe device path.

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.