arch/powerpc/boot/treeboot-bamboo.c

Source file repositories/reference/linux-study-clean/arch/powerpc/boot/treeboot-bamboo.c

File Facts

System
Linux kernel
Corpus path
arch/powerpc/boot/treeboot-bamboo.c
Extension
.c
Size
877 bytes
Lines
41
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.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright IBM Corporation, 2007
 * Josh Boyer <jwboyer@linux.vnet.ibm.com>
 *
 * Based on ebony wrapper:
 * Copyright 2007 David Gibson, IBM Corporation.
 */
#include "ops.h"
#include "stdio.h"
#include "44x.h"
#include "stdlib.h"

BSS_STACK(4096);

#define PIBS_MAC0 0xfffc0400
#define PIBS_MAC1 0xfffc0500
char pibs_mac0[6];
char pibs_mac1[6];

static void read_pibs_mac(void)
{
	unsigned long long mac64;

	mac64 = strtoull((char *)PIBS_MAC0, 0, 16);
	memcpy(&pibs_mac0, (char *)&mac64+2, 6);

	mac64 = strtoull((char *)PIBS_MAC1, 0, 16);
	memcpy(&pibs_mac1, (char *)&mac64+2, 6);
}

void platform_init(void)
{
	unsigned long end_of_ram = 0x8000000;
	unsigned long avail_ram = end_of_ram - (unsigned long)_end;

	simple_alloc_init(_end, avail_ram, 32, 64);
	read_pibs_mac();
	bamboo_init((u8 *)&pibs_mac0, (u8 *)&pibs_mac1);
}

Annotation

Implementation Notes