arch/powerpc/boot/microwatt.c

File Facts

System

Linux kernel

Corpus path

arch/powerpc/boot/microwatt.c

Extension

.c

Size

549 bytes

Lines

25

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

• stddef.h
• stdio.h
• types.h
• io.h
• ops.h

Detected Declarations

• function platform_init

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-or-later

#include <stddef.h>
#include "stdio.h"
#include "types.h"
#include "io.h"
#include "ops.h"

BSS_STACK(8192);

void platform_init(unsigned long r3, unsigned long r4, unsigned long r5)
{
	unsigned long heapsize = 16*1024*1024 - (unsigned long)_end;

	/*
	 * Disable interrupts and turn off MSR_RI, since we'll
	 * shortly be overwriting the interrupt vectors.
	 */
	__asm__ volatile("mtmsrd %0,1" : : "r" (0));

	simple_alloc_init(_end, heapsize, 32, 64);
	fdt_init(_dtb_start);
	serial_console_init();
}

Annotation

• Immediate include surface: `stddef.h`, `stdio.h`, `types.h`, `io.h`, `ops.h`.
• Detected declarations: `function platform_init`.
• 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.