arch/powerpc/platforms/amigaone/setup.c

Source file repositories/reference/linux-study-clean/arch/powerpc/platforms/amigaone/setup.c

File Facts

System
Linux kernel
Corpus path
arch/powerpc/platforms/amigaone/setup.c
Extension
.c
Size
4161 bytes
Lines
169
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

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * AmigaOne platform setup
 *
 * Copyright 2008 Gerhard Pircher (gerhard_pircher@gmx.net)
 *
 *   Based on original amigaone_setup.c source code
 * Copyright 2003 by Hans-Joerg Frieden and Thomas Frieden
 */

#include <linux/irqdomain.h>
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/seq_file.h>
#include <generated/utsrelease.h>

#include <asm/machdep.h>
#include <asm/cputable.h>
#include <asm/pci-bridge.h>
#include <asm/i8259.h>
#include <asm/time.h>
#include <asm/udbg.h>
#include <asm/dma.h>

extern void __flush_disable_L1(void);

static void amigaone_show_cpuinfo(struct seq_file *m)
{
	seq_printf(m, "vendor\t\t: Eyetech Ltd.\n");
}

static int __init amigaone_add_bridge(struct device_node *dev)
{
	const u32 *cfg_addr, *cfg_data;
	int len;
	const int *bus_range;
	struct pci_controller *hose;

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

	cfg_addr = of_get_address(dev, 0, NULL, NULL);
	cfg_data = of_get_address(dev, 1, NULL, NULL);
	if ((cfg_addr == NULL) || (cfg_data == NULL))
		return -ENODEV;

	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, cfg_addr[0], cfg_data[0], 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);

	return 0;
}

static void __init amigaone_setup_arch(void)
{
	if (ppc_md.progress)
		ppc_md.progress("Linux/PPC "UTS_RELEASE"\n", 0);
}

static void __init amigaone_discover_phbs(void)
{
	struct device_node *np;
	int phb = -ENODEV;

	/* Lookup PCI host bridges. */
	for_each_compatible_node(np, "pci", "mai-logic,articia-s")
		phb = amigaone_add_bridge(np);

	BUG_ON(phb != 0);
}

static void __init amigaone_init_IRQ(void)
{
	struct device_node *pic, *np = NULL;
	const unsigned long *prop = NULL;
	unsigned long int_ack = 0;

Annotation

Implementation Notes