arch/mips/fw/arc/identify.c

Source file repositories/reference/linux-study-clean/arch/mips/fw/arc/identify.c

File Facts

System
Linux kernel
Corpus path
arch/mips/fw/arc/identify.c
Extension
.c
Size
2316 bytes
Lines
112
Domain
Architecture Layer
Bucket
arch/mips
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

struct smatch {
	char *arcname;
	char *liname;
	int flags;
};

static struct smatch mach_table[] = {
	{
		.arcname	= "SGI-IP22",
		.liname		= "SGI Indy",
		.flags		= PROM_FLAG_ARCS,
	}, {
		.arcname	= "SGI-IP28",
		.liname		= "SGI IP28",
		.flags		= PROM_FLAG_ARCS,
	}, {
		.arcname	= "SGI-IP30",
		.liname		= "SGI Octane",
		.flags		= PROM_FLAG_ARCS,
	}, {
		.arcname	= "SGI-IP32",
		.liname		= "SGI O2",
		.flags		= PROM_FLAG_ARCS,
	}, {
		.arcname	= "Microsoft-Jazz",
		.liname		= "Jazz MIPS_Magnum_4000",
		.flags		= 0,
	}, {
		.arcname	= "PICA-61",
		.liname		= "Jazz Acer_PICA_61",
		.flags		= 0,
	}, {
		.arcname	= "RM200PCI",
		.liname		= "SNI RM200_PCI",
		.flags		= PROM_FLAG_DONT_FREE_TEMP,
	}, {
		.arcname	= "RM200PCI-R5K",
		.liname		= "SNI RM200_PCI-R5K",
		.flags		= PROM_FLAG_DONT_FREE_TEMP,
	}
};

int prom_flags;

static struct smatch * __init string_to_mach(const char *s)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(mach_table); i++) {
		if (!strcmp(s, mach_table[i].arcname))
			return &mach_table[i];
	}

	panic("Yeee, could not determine architecture type <%s>", s);
}

char *system_type;

const char *get_system_type(void)
{
	return system_type;
}

static pcomponent * __init ArcGetChild(pcomponent *Current)
{
	return (pcomponent *) ARC_CALL1(child_component, Current);
}

void __init prom_identify_arch(void)
{
	pcomponent *p;
	struct smatch *mach;
	const char *iname;

	/*
	 * The root component tells us what machine architecture we have here.
	 */
	p = ArcGetChild(PROM_NULL_COMPONENT);
	if (p == NULL) {
		iname = "Unknown";
	} else
		iname = (char *) (long) p->iname;

	printk("ARCH: %s\n", iname);
	mach = string_to_mach(iname);
	system_type = mach->liname;

	prom_flags = mach->flags;
}

Annotation

Implementation Notes