arch/loongarch/include/asm/inst.h

File Facts

System

Linux kernel

Corpus path

arch/loongarch/include/asm/inst.h

Extension

.h

Size

20926 bytes

Lines

810

Domain

Architecture Layer

Bucket

arch/loongarch

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/bitops.h
• linux/types.h
• asm/asm.h
• asm/ptrace.h

Detected Declarations

• struct reg0i15_format
• struct reg0i26_format
• struct reg1i20_format
• struct reg1i21_format
• struct reg2_format
• struct reg2i5_format
• struct reg2i6_format
• struct reg2i12_format
• struct reg2i14_format
• struct reg2i16_format
• struct reg2bstrd_format
• struct reg2csr_format
• struct reg3_format
• struct reg3sa2_format
• struct pt_regs
• enum reg0i15_op
• enum reg0i26_op
• enum reg1i20_op
• enum reg1i21_op
• enum reg2_op
• enum reg2i5_op
• enum reg2i6_op
• enum reg2i12_op
• enum reg2i14_op
• enum reg2i16_op
• enum reg2bstrd_op
• enum reg3_op
• enum reg3sa2_op
• enum loongarch_gpr
• function is_imm_negative
• function is_break_ins
• function is_pc_ins
• function is_branch_ins
• function is_ra_save_ins
• function is_stack_alloc_ins
• function is_self_loop_ins
• function signed_imm_check
• function unsigned_imm_check
• function emit_jirl

Annotated Snippet

struct reg0i15_format {
	unsigned int immediate : 15;
	unsigned int opcode : 17;
};

struct reg0i26_format {
	unsigned int immediate_h : 10;
	unsigned int immediate_l : 16;
	unsigned int opcode : 6;
};

struct reg1i20_format {
	unsigned int rd : 5;
	unsigned int immediate : 20;
	unsigned int opcode : 7;
};

struct reg1i21_format {
	unsigned int immediate_h  : 5;
	unsigned int rj : 5;
	unsigned int immediate_l : 16;
	unsigned int opcode : 6;
};

struct reg2_format {
	unsigned int rd : 5;
	unsigned int rj : 5;
	unsigned int opcode : 22;
};

struct reg2i5_format {
	unsigned int rd : 5;
	unsigned int rj : 5;
	unsigned int immediate : 5;
	unsigned int opcode : 17;
};

struct reg2i6_format {
	unsigned int rd : 5;
	unsigned int rj : 5;
	unsigned int immediate : 6;
	unsigned int opcode : 16;
};

struct reg2i12_format {
	unsigned int rd : 5;
	unsigned int rj : 5;
	unsigned int immediate : 12;
	unsigned int opcode : 10;
};

struct reg2i14_format {
	unsigned int rd : 5;
	unsigned int rj : 5;
	unsigned int immediate : 14;
	unsigned int opcode : 8;
};

struct reg2i16_format {
	unsigned int rd : 5;
	unsigned int rj : 5;
	unsigned int immediate : 16;
	unsigned int opcode : 6;
};

struct reg2bstrd_format {
	unsigned int rd : 5;
	unsigned int rj : 5;
	unsigned int lsbd : 6;
	unsigned int msbd : 6;
	unsigned int opcode : 10;
};

struct reg2csr_format {
	unsigned int rd : 5;
	unsigned int rj : 5;
	unsigned int csr : 14;
	unsigned int opcode : 8;
};

struct reg3_format {
	unsigned int rd : 5;
	unsigned int rj : 5;
	unsigned int rk : 5;
	unsigned int opcode : 17;
};

struct reg3sa2_format {
	unsigned int rd : 5;
	unsigned int rj : 5;

Annotation

• Immediate include surface: `linux/bitops.h`, `linux/types.h`, `asm/asm.h`, `asm/ptrace.h`.
• Detected declarations: `struct reg0i15_format`, `struct reg0i26_format`, `struct reg1i20_format`, `struct reg1i21_format`, `struct reg2_format`, `struct reg2i5_format`, `struct reg2i6_format`, `struct reg2i12_format`, `struct reg2i14_format`, `struct reg2i16_format`.
• Atlas domain: Architecture Layer / arch/loongarch.
• 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.