Release 4.14 arch/x86/kernel/devicetree.c

Directory: arch/x86/kernel
// SPDX-License-Identifier: GPL-2.0
/*
 * Architecture specific OF callbacks.
 */
#include <linux/bootmem.h>
#include <linux/export.h>
#include <linux/io.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/of.h>
#include <linux/of_fdt.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/of_irq.h>
#include <linux/slab.h>
#include <linux/pci.h>
#include <linux/of_pci.h>
#include <linux/initrd.h>

#include <asm/irqdomain.h>
#include <asm/hpet.h>
#include <asm/apic.h>
#include <asm/pci_x86.h>
#include <asm/setup.h>
#include <asm/i8259.h>


__initdata u64 initial_dtb;

char __initdata cmd_line[COMMAND_LINE_SIZE];


int __initdata of_ioapic;



void __init early_init_dt_scan_chosen_arch(unsigned long node)
{
	BUG();
}

Contributors
Person Tokens Prop Commits CommitProp
Sebastian Andrzej Siewior 13 100.00% 1 100.00%
Total 13 100.00% 1 100.00%



void __init early_init_dt_add_memory_arch(u64 base, u64 size)
{
	BUG();
}

Contributors
Person Tokens Prop Commits CommitProp
Sebastian Andrzej Siewior 15 100.00% 1 100.00%
Total 15 100.00% 1 100.00%



void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
{
	return __alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS));
}

Contributors
Person Tokens Prop Commits CommitProp
Sebastian Andrzej Siewior 26 100.00% 1 100.00%
Total 26 100.00% 1 100.00%



void __init add_dtb(u64 data)
{
	initial_dtb = data + offsetof(struct setup_data, data);
}

Contributors
Person Tokens Prop Commits CommitProp
Sebastian Andrzej Siewior 21 100.00% 2 100.00%
Total 21 100.00% 2 100.00%

/*
 * CE4100 ids. Will be moved to machine_device_initcall() once we have it.
 */

static struct of_device_id __initdata ce4100_ids[] = {
	{ .compatible = "intel,ce4100-cp", },
	{ .compatible = "isa", },
	{ .compatible = "pci", },
	{},
};



static int __init add_bus_probe(void)
{
	if (!of_have_populated_dt())
		return 0;

	return of_platform_bus_probe(NULL, ce4100_ids, NULL);
}
Contributors
Person Tokens Prop Commits CommitProp
Sebastian Andrzej Siewior 28 100.00% 2 100.00%
Total 28 100.00% 2 100.00%


device_initcall(add_bus_probe);

#ifdef CONFIG_PCI


struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus)
{
	struct device_node *np;

	for_each_node_by_type(np, "pci") {
		const void *prop;
		unsigned int bus_min;

		prop = of_get_property(np, "bus-range", NULL);
		if (!prop)
			continue;
		bus_min = be32_to_cpup(prop);
		if (bus->number == bus_min)
			return np;
	}
	return NULL;
}

Contributors
Person Tokens Prop Commits CommitProp
Benjamin Herrenschmidt 72 100.00% 1 100.00%
Total 72 100.00% 1 100.00%



static int x86_of_pci_irq_enable(struct pci_dev *dev)
{
	u32 virq;
	int ret;
	u8 pin;

	ret = pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
	if (ret)
		return ret;
	if (!pin)
		return 0;

	virq = of_irq_parse_and_map_pci(dev, 0, 0);
	if (virq == 0)
		return -EINVAL;
	dev->irq = virq;
	return 0;
}

Contributors
Person Tokens Prop Commits CommitProp
Sebastian Andrzej Siewior 74 96.10% 1 50.00%
Grant C. Likely 3 3.90% 1 50.00%
Total 77 100.00% 2 100.00%



static void x86_of_pci_irq_disable(struct pci_dev *dev)
{
}

Contributors
Person Tokens Prop Commits CommitProp
Sebastian Andrzej Siewior 10 100.00% 1 100.00%
Total 10 100.00% 1 100.00%



void x86_of_pci_init(void)
{
	pcibios_enable_irq = x86_of_pci_irq_enable;
	pcibios_disable_irq = x86_of_pci_irq_disable;
}
Contributors
Person Tokens Prop Commits CommitProp
Sebastian Andrzej Siewior 15 100.00% 1 100.00%
Total 15 100.00% 1 100.00%

#endif



static void __init dtb_setup_hpet(void)
{
#ifdef CONFIG_HPET_TIMER
	struct device_node *dn;
	struct resource r;
	int ret;

	dn = of_find_compatible_node(NULL, NULL, "intel,ce4100-hpet");
	if (!dn)
		return;
	ret = of_address_to_resource(dn, 0, &r);
	if (ret) {
		WARN_ON(1);
		return;
	}
	hpet_address = r.start;
#endif
}

Contributors
Person Tokens Prop Commits CommitProp
Sebastian Andrzej Siewior 73 100.00% 2 100.00%
Total 73 100.00% 2 100.00%



static void __init dtb_lapic_setup(void)
{
#ifdef CONFIG_X86_LOCAL_APIC
	struct device_node *dn;
	struct resource r;
	int ret;

	dn = of_find_compatible_node(NULL, NULL, "intel,ce4100-lapic");
	if (!dn)
		return;

	ret = of_address_to_resource(dn, 0, &r);
	if (WARN_ON(ret))
		return;

	/* Did the boot loader setup the local APIC ? */
	if (!boot_cpu_has(X86_FEATURE_APIC)) {
		if (apic_force_enable(r.start))
			return;
	}
	smp_found_config = 1;
	pic_mode = 1;
	register_lapic_address(r.start);
	generic_processor_info(boot_cpu_physical_apicid,
			       GET_APIC_VERSION(apic_read(APIC_LVR)));
#endif
}

Contributors
Person Tokens Prop Commits CommitProp
Thomas Gleixner 65 58.04% 1 33.33%
Sebastian Andrzej Siewior 43 38.39% 1 33.33%
Borislav Petkov 4 3.57% 1 33.33%
Total 112 100.00% 3 100.00%

#ifdef CONFIG_X86_IO_APIC

static unsigned int ioapic_id;


struct of_ioapic_type {
	
u32 out_type;
	
u32 trigger;
	
u32 polarity;
};


static struct of_ioapic_type of_ioapic_type[] =
{
	{
		.out_type	= IRQ_TYPE_EDGE_RISING,
		.trigger	= IOAPIC_EDGE,
		.polarity	= 1,
        },
	{
		.out_type	= IRQ_TYPE_LEVEL_LOW,
		.trigger	= IOAPIC_LEVEL,
		.polarity	= 0,
        },
	{
		.out_type	= IRQ_TYPE_LEVEL_HIGH,
		.trigger	= IOAPIC_LEVEL,
		.polarity	= 1,
        },
	{
		.out_type	= IRQ_TYPE_EDGE_FALLING,
		.trigger	= IOAPIC_EDGE,
		.polarity	= 0,
        },
};



static int dt_irqdomain_alloc(struct irq_domain *domain, unsigned int virq,
			      unsigned int nr_irqs, void *arg)
{
	struct of_phandle_args *irq_data = (void *)arg;
	struct of_ioapic_type *it;
	struct irq_alloc_info tmp;

	if (WARN_ON(irq_data->args_count < 2))
		return -EINVAL;
	if (irq_data->args[1] >= ARRAY_SIZE(of_ioapic_type))
		return -EINVAL;

	it = &of_ioapic_type[irq_data->args[1]];
	ioapic_set_alloc_attr(&tmp, NUMA_NO_NODE, it->trigger, it->polarity);
	tmp.ioapic_id = mpc_ioapic_id(mp_irqdomain_ioapic_idx(domain));
	tmp.ioapic_pin = irq_data->args[0];

	return mp_irqdomain_alloc(domain, virq, nr_irqs, &tmp);
}

Contributors
Person Tokens Prop Commits CommitProp
Jiang Liu 65 46.10% 1 33.33%
Sebastian Andrzej Siewior 57 40.43% 1 33.33%
Grant C. Likely 19 13.48% 1 33.33%
Total 141 100.00% 3 100.00%


static const struct irq_domain_ops ioapic_irq_domain_ops = {
	.alloc		= dt_irqdomain_alloc,
	.free		= mp_irqdomain_free,
	.activate	= mp_irqdomain_activate,
	.deactivate	= mp_irqdomain_deactivate,
};



static void __init dtb_add_ioapic(struct device_node *dn)
{
	struct resource r;
	int ret;
	struct ioapic_domain_cfg cfg = {
		.type = IOAPIC_DOMAIN_DYNAMIC,
		.ops = &ioapic_irq_domain_ops,
		.dev = dn,
        };

	ret = of_address_to_resource(dn, 0, &r);
	if (ret) {
		printk(KERN_ERR "Can't obtain address from device node %pOF.\n", dn);
		return;
	}
	mp_register_ioapic(++ioapic_id, r.start, gsi_top, &cfg);
}

Contributors
Person Tokens Prop Commits CommitProp
Sebastian Andrzej Siewior 44 53.01% 1 25.00%
Jiang Liu 37 44.58% 1 25.00%
Rob Herring 1 1.20% 1 25.00%
Suresh B. Siddha 1 1.20% 1 25.00%
Total 83 100.00% 4 100.00%



static void __init dtb_ioapic_setup(void)
{
	struct device_node *dn;

	for_each_compatible_node(dn, NULL, "intel,ce4100-ioapic")
		dtb_add_ioapic(dn);

	if (nr_ioapics) {
		of_ioapic = 1;
		return;
	}
	printk(KERN_ERR "Error: No information about IO-APIC in OF.\n");
}
Contributors
Person Tokens Prop Commits CommitProp
Jiang Liu 31 70.45% 1 33.33%
Sebastian Andrzej Siewior 12 27.27% 1 33.33%
Grant C. Likely 1 2.27% 1 33.33%
Total 44 100.00% 3 100.00%

#else


static void __init dtb_ioapic_setup(void) {}
Contributors
Person Tokens Prop Commits CommitProp
Jiang Liu 8 100.00% 1 100.00%
Total 8 100.00% 1 100.00%

#endif



static void __init dtb_apic_setup(void)
{
	dtb_lapic_setup();
	dtb_ioapic_setup();
}

Contributors
Person Tokens Prop Commits CommitProp
Jiang Liu 9 60.00% 1 50.00%
Sebastian Andrzej Siewior 6 40.00% 1 50.00%
Total 15 100.00% 2 100.00%

#ifdef CONFIG_OF_FLATTREE


static void __init x86_flattree_get_config(void)
{
	u32 size, map_len;
	void *dt;

	if (!initial_dtb)
		return;

	map_len = max(PAGE_SIZE - (initial_dtb & ~PAGE_MASK), (u64)128);

	initial_boot_params = dt = early_memremap(initial_dtb, map_len);
	size = of_get_flat_dt_size();
	if (map_len < size) {
		early_memunmap(dt, map_len);
		initial_boot_params = dt = early_memremap(initial_dtb, size);
		map_len = size;
	}

	unflatten_and_copy_device_tree();
	early_memunmap(dt, map_len);
}
Contributors
Person Tokens Prop Commits CommitProp
Jiang Liu 77 77.78% 1 33.33%
Sebastian Andrzej Siewior 20 20.20% 1 33.33%
Juergen Gross 2 2.02% 1 33.33%
Total 99 100.00% 3 100.00%

#else


static inline void x86_flattree_get_config(void) { }
Contributors
Person Tokens Prop Commits CommitProp
Sebastian Andrzej Siewior 5 62.50% 1 50.00%
Jiang Liu 3 37.50% 1 50.00%
Total 8 100.00% 2 100.00%

#endif



void __init x86_dtb_init(void)
{
	x86_flattree_get_config();

	if (!of_have_populated_dt())
		return;

	dtb_setup_hpet();
	dtb_apic_setup();
}
Contributors
Person Tokens Prop Commits CommitProp
Jiang Liu 24 100.00% 1 100.00%
Total 24 100.00% 1 100.00%

Overall Contributors
Person Tokens Prop Commits CommitProp
Sebastian Andrzej Siewior 667 58.46% 8 29.63%
Jiang Liu 285 24.98% 5 18.52%
Benjamin Herrenschmidt 72 6.31% 1 3.70%
Thomas Gleixner 69 6.05% 2 7.41%
Grant C. Likely 29 2.54% 2 7.41%
Paul Gortmaker 4 0.35% 2 7.41%
Rob Herring 4 0.35% 2 7.41%
Borislav Petkov 4 0.35% 1 3.70%
Florian Fainelli 3 0.26% 1 3.70%
Juergen Gross 2 0.18% 1 3.70%
Suresh B. Siddha 1 0.09% 1 3.70%
Greg Kroah-Hartman 1 0.09% 1 3.70%
Total 1141 100.00% 27 100.00%
Directory: arch/x86/kernel

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.
Person	Tokens	Prop	Commits	CommitProp
Sebastian Andrzej Siewior	13	100.00%	1	100.00%
Total	13	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.14 arch/x86/kernel/devicetree.c

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Contributors

Overall Contributors
