arch/m68k/include/asm/mcfwdebug.h

File Facts

System

Linux kernel

Corpus path

arch/m68k/include/asm/mcfwdebug.h

Extension

.h

Size

5106 bytes

Lines

120

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.

Dependency Surface

• No C-style include directives detected by the generator.

Detected Declarations

• function instructions

Annotated Snippet

static inline void wdebug(int reg, unsigned long data) {
	unsigned short dbg_spc[6];
	unsigned short *dbg;

	// Force alignment to long word boundary
	dbg = (unsigned short *)((((unsigned long)dbg_spc) + 3) & 0xfffffffc);

	// Build up the debug instruction
	dbg[0] = 0x2c80 | (reg & 0xf);
	dbg[1] = (data >> 16) & 0xffff;
	dbg[2] = data & 0xffff;
	dbg[3] = 0;

	// Perform the wdebug instruction
#if 0
	// This strain is for gas which doesn't have the wdebug instructions defined
	asm(	"move.l	%0, %%a0\n\t"
		".word	0xfbd0\n\t"
		".word	0x0003\n\t"
	    :: "g" (dbg) : "a0");
#else
	// And this is for when it does
	asm(	"wdebug	(%0)" :: "a" (dbg));
#endif
}

#endif

Annotation

• Detected declarations: `function instructions`.
• 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.