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// SPDX-License-Identifier: GPL-2.0
/*
* Architecture specific OF callbacks.
*/
#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/libfdt.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/io_apic.h>
#include <asm/pci_x86.h>
#include <asm/setup.h>
#include <asm/i8259.h>
#include <asm/numa.h>
#include <asm/prom.h>
__initdata u64 initial_dtb;
char __initdata cmd_line[COMMAND_LINE_SIZE];
int __initdata of_ioapic;
void __init add_dtb(u64 data)
{
initial_dtb = data + offsetof(struct setup_data, data);
}
/*
* 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);
}
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;
}
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 pcibios_err_to_errno(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;
}
static void x86_of_pci_irq_disable(struct pci_dev *dev)
{
}
void x86_of_pci_init(void)
{
pcibios_enable_irq = x86_of_pci_irq_enable;
pcibios_disable_irq = x86_of_pci_irq_disable;
}
#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
}
#ifdef CONFIG_X86_LOCAL_APIC
static void __init dtb_cpu_setup(void)
{
struct device_node *dn;
u32 apic_id;
for_each_of_cpu_node(dn) {
apic_id = of_get_cpu_hwid(dn, 0);
if (apic_id == ~0U) {
pr_warn("%pOF: missing local APIC ID\n", dn);
continue;
}
topology_register_apic(apic_id, CPU_ACPIID_INVALID, true);
set_apicid_to_node(apic_id, of_node_to_nid(dn));
}
}
static void __init dtb_lapic_setup(void)
{
struct device_node *dn;
struct resource r;
unsigned long lapic_addr = APIC_DEFAULT_PHYS_BASE;
int ret;
dn = of_find_compatible_node(NULL, NULL, "intel,ce4100-lapic");
if (dn) {
ret = of_address_to_resource(dn, 0, &r);
if (WARN_ON(ret))
return;
lapic_addr = r.start;
}
/* Did the boot loader setup the local APIC ? */
if (!boot_cpu_has(X86_FEATURE_APIC)) {
/* Try force enabling, which registers the APIC address */
if (!apic_force_enable(lapic_addr))
return;
} else {
register_lapic_address(lapic_addr);
}
smp_found_config = 1;
pic_mode = !of_property_read_bool(dn, "intel,virtual-wire-mode");
pr_info("%s compatibility mode.\n", pic_mode ? "IMCR and PIC" : "Virtual Wire");
}
#endif /* CONFIG_X86_LOCAL_APIC */
#ifdef CONFIG_X86_IO_APIC
static unsigned int ioapic_id;
struct of_ioapic_type {
u32 out_type;
u32 is_level;
u32 active_low;
};
static struct of_ioapic_type of_ioapic_type[] =
{
{
.out_type = IRQ_TYPE_EDGE_FALLING,
.is_level = 0,
.active_low = 1,
},
{
.out_type = IRQ_TYPE_LEVEL_HIGH,
.is_level = 1,
.active_low = 0,
},
{
.out_type = IRQ_TYPE_LEVEL_LOW,
.is_level = 1,
.active_low = 1,
},
{
.out_type = IRQ_TYPE_EDGE_RISING,
.is_level = 0,
.active_low = 0,
},
};
static int dt_irqdomain_alloc(struct irq_domain *domain, unsigned int virq,
unsigned int nr_irqs, void *arg)
{
struct irq_fwspec *fwspec = (struct irq_fwspec *)arg;
struct of_ioapic_type *it;
struct irq_alloc_info tmp;
int type_index;
if (WARN_ON(fwspec->param_count < 2))
return -EINVAL;
type_index = fwspec->param[1];
if (type_index >= ARRAY_SIZE(of_ioapic_type))
return -EINVAL;
it = &of_ioapic_type[type_index];
ioapic_set_alloc_attr(&tmp, NUMA_NO_NODE, it->is_level, it->active_low);
tmp.devid = mpc_ioapic_id(mp_irqdomain_ioapic_idx(domain));
tmp.ioapic.pin = fwspec->param[0];
return mp_irqdomain_alloc(domain, virq, nr_irqs, &tmp);
}
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) {
pr_err("Can't obtain address from device node %pOF.\n", dn);
return;
}
mp_register_ioapic(++ioapic_id, r.start, gsi_top, &cfg);
}
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;
}
pr_err("Error: No information about IO-APIC in OF.\n");
}
#else
static void __init dtb_ioapic_setup(void) {}
#endif
static void __init dtb_apic_setup(void)
{
#ifdef CONFIG_X86_LOCAL_APIC
dtb_lapic_setup();
dtb_cpu_setup();
#endif
dtb_ioapic_setup();
}
static void __init x86_dtb_parse_smp_config(void)
{
if (!of_have_populated_dt())
return;
dtb_setup_hpet();
dtb_apic_setup();
}
void __init x86_flattree_get_config(void)
{
#ifdef CONFIG_OF_EARLY_FLATTREE
u32 size, map_len;
void *dt;
if (initial_dtb) {
map_len = max(PAGE_SIZE - (initial_dtb & ~PAGE_MASK), (u64)128);
dt = early_memremap(initial_dtb, map_len);
size = fdt_totalsize(dt);
if (map_len < size) {
early_memunmap(dt, map_len);
dt = early_memremap(initial_dtb, size);
map_len = size;
}
early_init_dt_verify(dt);
}
unflatten_and_copy_device_tree();
if (initial_dtb)
early_memunmap(dt, map_len);
#endif
if (of_have_populated_dt())
x86_init.mpparse.parse_smp_cfg = x86_dtb_parse_smp_config;
}
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