arch/powerpc/include/asm/disassemble.h

File Facts

System

Linux kernel

Corpus path

arch/powerpc/include/asm/disassemble.h

Extension

.h

Size

2189 bytes

Lines

118

Domain

Architecture Layer

Bucket

arch/powerpc

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

• linux/types.h

Detected Declarations

• function get_op
• function get_xop
• function get_sprn
• function get_dcrn
• function get_tmrn
• function get_rt
• function get_rs
• function get_ra
• function get_rb
• function get_rc
• function get_ws
• function get_d
• function get_oc
• function get_tx_or_sx
• function make_dsisr

Annotated Snippet

#ifndef __ASM_PPC_DISASSEMBLE_H__
#define __ASM_PPC_DISASSEMBLE_H__

#include <linux/types.h>

static inline unsigned int get_op(u32 inst)
{
	return inst >> 26;
}

static inline unsigned int get_xop(u32 inst)
{
	return (inst >> 1) & 0x3ff;
}

static inline unsigned int get_sprn(u32 inst)
{
	return ((inst >> 16) & 0x1f) | ((inst >> 6) & 0x3e0);
}

static inline unsigned int get_dcrn(u32 inst)
{
	return ((inst >> 16) & 0x1f) | ((inst >> 6) & 0x3e0);
}

static inline unsigned int get_tmrn(u32 inst)
{
	return ((inst >> 16) & 0x1f) | ((inst >> 6) & 0x3e0);
}

static inline unsigned int get_rt(u32 inst)
{
	return (inst >> 21) & 0x1f;
}

static inline unsigned int get_rs(u32 inst)
{
	return (inst >> 21) & 0x1f;
}

static inline unsigned int get_ra(u32 inst)
{
	return (inst >> 16) & 0x1f;
}

static inline unsigned int get_rb(u32 inst)
{
	return (inst >> 11) & 0x1f;
}

static inline unsigned int get_rc(u32 inst)
{
	return inst & 0x1;
}

static inline unsigned int get_ws(u32 inst)
{
	return (inst >> 11) & 0x1f;
}

static inline unsigned int get_d(u32 inst)
{
	return inst & 0xffff;
}

static inline unsigned int get_oc(u32 inst)
{
	return (inst >> 11) & 0x7fff;
}

static inline unsigned int get_tx_or_sx(u32 inst)
{
	return (inst) & 0x1;
}

#define IS_XFORM(inst)	(get_op(inst)  == 31)
#define IS_DSFORM(inst)	(get_op(inst) >= 56)

/*
 * Create a DSISR value from the instruction
 */
static inline unsigned make_dsisr(unsigned instr)
{
	unsigned dsisr;


	/* bits  6:15 --> 22:31 */
	dsisr = (instr & 0x03ff0000) >> 16;

	if (IS_XFORM(instr)) {

Annotation

• Immediate include surface: `linux/types.h`.
• Detected declarations: `function get_op`, `function get_xop`, `function get_sprn`, `function get_dcrn`, `function get_tmrn`, `function get_rt`, `function get_rs`, `function get_ra`, `function get_rb`, `function get_rc`.
• Atlas domain: Architecture Layer / arch/powerpc.
• 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.