mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-18 18:59:44 +00:00
b46c2088da
At present irq_router is declared as a static struct irq_router in arch/x86/cpu/irq.c. Since it's a driver control block, it makes sense to move it to a per driver priv. Adjust existing APIs to accept an additional parameter of irq_router's udevice. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org> Tested-by: Simon Glass <sjg@chromium.org>
136 lines
3.1 KiB
C
136 lines
3.1 KiB
C
/*
|
|
* Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
|
|
*
|
|
* Part of this file is ported from coreboot src/arch/x86/boot/pirq_routing.c
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <pci.h>
|
|
#include <asm/pci.h>
|
|
#include <asm/pirq_routing.h>
|
|
#include <asm/tables.h>
|
|
|
|
static bool irq_already_routed[16];
|
|
|
|
static u8 pirq_get_next_free_irq(struct udevice *dev, u8 *pirq, u16 bitmap)
|
|
{
|
|
int i, link;
|
|
u8 irq = 0;
|
|
|
|
/* IRQ sharing starts from IRQ#3 */
|
|
for (i = 3; i < 16; i++) {
|
|
/* Can we assign this IRQ? */
|
|
if (!((bitmap >> i) & 1))
|
|
continue;
|
|
|
|
/* We can, now let's assume we can use this IRQ */
|
|
irq = i;
|
|
|
|
/* Have we already routed it? */
|
|
if (irq_already_routed[irq])
|
|
continue;
|
|
|
|
for (link = 0; link < CONFIG_MAX_PIRQ_LINKS; link++) {
|
|
if (pirq_check_irq_routed(dev, link, irq)) {
|
|
irq_already_routed[irq] = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* If it's not yet routed, use it */
|
|
if (!irq_already_routed[irq]) {
|
|
irq_already_routed[irq] = true;
|
|
break;
|
|
}
|
|
|
|
/* But if it was already routed, try the next one */
|
|
}
|
|
|
|
/* Now we get our IRQ */
|
|
return irq;
|
|
}
|
|
|
|
void pirq_route_irqs(struct udevice *dev, struct irq_info *irq, int num)
|
|
{
|
|
unsigned char irq_slot[MAX_INTX_ENTRIES];
|
|
unsigned char pirq[CONFIG_MAX_PIRQ_LINKS];
|
|
int i, intx;
|
|
|
|
memset(pirq, 0, CONFIG_MAX_PIRQ_LINKS);
|
|
|
|
/* Set PCI IRQs */
|
|
for (i = 0; i < num; i++) {
|
|
debug("PIRQ Entry %d Dev: %d.%x.%d\n", i,
|
|
irq->bus, irq->devfn >> 3, irq->devfn & 7);
|
|
|
|
for (intx = 0; intx < MAX_INTX_ENTRIES; intx++) {
|
|
int link = irq->irq[intx].link;
|
|
int bitmap = irq->irq[intx].bitmap;
|
|
int irq = 0;
|
|
|
|
debug("INT%c link: %x bitmap: %x ",
|
|
'A' + intx, link, bitmap);
|
|
|
|
if (!bitmap || !link) {
|
|
debug("not routed\n");
|
|
irq_slot[intx] = irq;
|
|
continue;
|
|
}
|
|
|
|
/* translate link value to link number */
|
|
link = pirq_translate_link(dev, link);
|
|
|
|
/* yet not routed */
|
|
if (!pirq[link]) {
|
|
irq = pirq_get_next_free_irq(dev, pirq, bitmap);
|
|
pirq[link] = irq;
|
|
} else {
|
|
irq = pirq[link];
|
|
}
|
|
|
|
debug("IRQ: %d\n", irq);
|
|
irq_slot[intx] = irq;
|
|
|
|
/* Assign IRQ in the interrupt router */
|
|
pirq_assign_irq(dev, link, irq);
|
|
}
|
|
|
|
/* Bus, device, slots IRQs for {A,B,C,D} */
|
|
pci_assign_irqs(irq->bus, irq->devfn >> 3, irq_slot);
|
|
|
|
irq++;
|
|
}
|
|
|
|
for (i = 0; i < CONFIG_MAX_PIRQ_LINKS; i++)
|
|
debug("PIRQ%c: %d\n", 'A' + i, pirq[i]);
|
|
}
|
|
|
|
u32 copy_pirq_routing_table(u32 addr, struct irq_routing_table *rt)
|
|
{
|
|
struct irq_routing_table *rom_rt;
|
|
|
|
/* Fix up the table checksum */
|
|
rt->checksum = table_compute_checksum(rt, rt->size);
|
|
|
|
/* Align the table to be 16 byte aligned */
|
|
addr = ALIGN(addr, 16);
|
|
|
|
debug("Copying Interrupt Routing Table to 0x%x\n", addr);
|
|
memcpy((void *)addr, rt, rt->size);
|
|
|
|
/*
|
|
* We do the sanity check here against the copied table after memcpy,
|
|
* as something might go wrong after the memcpy, which is normally
|
|
* due to the F segment decode is not turned on to systeam RAM.
|
|
*/
|
|
rom_rt = (struct irq_routing_table *)addr;
|
|
if (rom_rt->signature != PIRQ_SIGNATURE ||
|
|
rom_rt->version != PIRQ_VERSION || rom_rt->size % 16) {
|
|
printf("Interrupt Routing Table not valid\n");
|
|
return addr;
|
|
}
|
|
|
|
return addr + rt->size;
|
|
}
|