arch/sparc/kernel/of_device_common.c

Source file repositories/reference/linux-study-clean/arch/sparc/kernel/of_device_common.c

File Facts

System
Linux kernel
Corpus path
arch/sparc/kernel/of_device_common.c
Extension
.c
Size
4056 bytes
Lines
181
Domain
Architecture Layer
Bucket
arch/sparc
Inferred role
Architecture Layer: exported/initcall integration point
Status
integration 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
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/export.h>
#include <linux/mod_devicetable.h>
#include <linux/errno.h>
#include <linux/irq.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/platform_device.h>

#include "of_device_common.h"

unsigned int irq_of_parse_and_map(struct device_node *node, int index)
{
	struct platform_device *op = of_find_device_by_node(node);

	if (!op || index >= op->archdata.num_irqs)
		return 0;

	return op->archdata.irqs[index];
}
EXPORT_SYMBOL(irq_of_parse_and_map);

int of_address_to_resource(struct device_node *node, int index,
			   struct resource *r)
{
	struct platform_device *op = of_find_device_by_node(node);

	if (!op || index >= op->num_resources)
		return -EINVAL;

	memcpy(r, &op->archdata.resource[index], sizeof(*r));
	return 0;
}
EXPORT_SYMBOL_GPL(of_address_to_resource);

void __iomem *of_iomap(struct device_node *node, int index)
{
	struct platform_device *op = of_find_device_by_node(node);
	struct resource *r;

	if (!op || index >= op->num_resources)
		return NULL;

	r = &op->archdata.resource[index];

	return of_ioremap(r, 0, resource_size(r), (char *) r->name);
}
EXPORT_SYMBOL(of_iomap);

/* Take the archdata values for IOMMU, STC, and HOSTDATA found in
 * BUS and propagate to all child platform_device objects.
 */
void of_propagate_archdata(struct platform_device *bus)
{
	struct dev_archdata *bus_sd = &bus->dev.archdata;
	struct device_node *bus_dp = bus->dev.of_node;
	struct device_node *dp;

	for (dp = bus_dp->child; dp; dp = dp->sibling) {
		struct platform_device *op = of_find_device_by_node(dp);

		op->dev.archdata.iommu = bus_sd->iommu;
		op->dev.archdata.stc = bus_sd->stc;
		op->dev.archdata.host_controller = bus_sd->host_controller;
		op->dev.archdata.numa_node = bus_sd->numa_node;
		op->dev.dma_ops = bus->dev.dma_ops;

		if (dp->child)
			of_propagate_archdata(op);
	}
}

static void get_cells(struct device_node *dp, int *addrc, int *sizec)
{
	if (addrc)
		*addrc = of_n_addr_cells(dp);
	if (sizec)
		*sizec = of_n_size_cells(dp);
}

/*
 * Default translator (generic bus)
 */

void of_bus_default_count_cells(struct device_node *dev, int *addrc, int *sizec)
{

Annotation

Implementation Notes