arch/powerpc/platforms/embedded6xx/linkstation.c

Source file repositories/reference/linux-study-clean/arch/powerpc/platforms/embedded6xx/linkstation.c

File Facts

System
Linux kernel
Corpus path
arch/powerpc/platforms/embedded6xx/linkstation.c
Extension
.c
Size
3844 bytes
Lines
161
Domain
Architecture Layer
Bucket
arch/powerpc
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

#include <linux/kernel.h>
#include <linux/initrd.h>
#include <linux/of_platform.h>
#include <linux/seq_file.h>

#include <asm/time.h>
#include <asm/mpic.h>
#include <asm/pci-bridge.h>

#include "mpc10x.h"

static const struct of_device_id of_bus_ids[] __initconst = {
	{ .type = "soc", },
	{ .compatible = "simple-bus", },
	{},
};

static int __init declare_of_platform_devices(void)
{
	of_platform_bus_probe(NULL, of_bus_ids, NULL);
	return 0;
}
machine_device_initcall(linkstation, declare_of_platform_devices);

static int __init linkstation_add_bridge(struct device_node *dev)
{
#ifdef CONFIG_PCI
	int len;
	struct pci_controller *hose;
	const int *bus_range;

	printk("Adding PCI host bridge %pOF\n", dev);

	bus_range = of_get_property(dev, "bus-range", &len);
	if (bus_range == NULL || len < 2 * sizeof(int))
		printk(KERN_WARNING "Can't get bus-range for %pOF, assume"
				" bus 0\n", dev);

	hose = pcibios_alloc_controller(dev);
	if (hose == NULL)
		return -ENOMEM;
	hose->first_busno = bus_range ? bus_range[0] : 0;
	hose->last_busno = bus_range ? bus_range[1] : 0xff;
	setup_indirect_pci(hose, 0xfec00000, 0xfee00000, 0);

	/* Interpret the "ranges" property */
	/* This also maps the I/O region and sets isa_io/mem_base */
	pci_process_bridge_OF_ranges(hose, dev, 1);
#endif
	return 0;
}

static void __init linkstation_setup_arch(void)
{
	printk(KERN_INFO "BUFFALO Network Attached Storage Series\n");
	printk(KERN_INFO "(C) 2002-2005 BUFFALO INC.\n");
}

static void __init linkstation_setup_pci(void)
{
	struct device_node *np;

	/* Lookup PCI host bridges */
	for_each_compatible_node(np, "pci", "mpc10x-pci")
		linkstation_add_bridge(np);
}

/*
 * Interrupt setup and service.  Interrupts on the linkstation come
 * from the four PCI slots plus onboard 8241 devices: I2C, DUART.
 */
static void __init linkstation_init_IRQ(void)
{
	struct mpic *mpic;

	mpic = mpic_alloc(NULL, 0, 0, 4, 0, " EPIC     ");
	BUG_ON(mpic == NULL);

	/* PCI IRQs */
	mpic_assign_isu(mpic, 0, mpic->paddr + 0x10200);

	/* I2C */
	mpic_assign_isu(mpic, 1, mpic->paddr + 0x11000);

	/* ttyS0, ttyS1 */
	mpic_assign_isu(mpic, 2, mpic->paddr + 0x11100);

	mpic_init(mpic);
}

Annotation

Implementation Notes