mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-16 01:38:22 +00:00
d4e61f505b
By default SCI is disabled after power on. ACTL is the register to enable SCI and route it to PIC/APIC. To support both ACPI in PIC mode and APIC mode, configure SCI to use IRQ9. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Stefan Roese <sr@denx.de> Tested-by: Stefan Roese <sr@denx.de>
69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
/*
|
|
* Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#ifndef _ARCH_IRQ_H_
|
|
#define _ARCH_IRQ_H_
|
|
|
|
#include <dt-bindings/interrupt-router/intel-irq.h>
|
|
|
|
/**
|
|
* Intel interrupt router configuration mechanism
|
|
*
|
|
* There are two known ways of Intel interrupt router configuration mechanism
|
|
* so far. On most cases, the IRQ routing configuraiton is controlled by PCI
|
|
* configuraiton registers on the legacy bridge, normally PCI BDF(0, 31, 0).
|
|
* On some newer platforms like BayTrail and Braswell, the IRQ routing is now
|
|
* in the IBASE register block where IBASE is memory-mapped.
|
|
*/
|
|
enum pirq_config {
|
|
PIRQ_VIA_PCI,
|
|
PIRQ_VIA_IBASE
|
|
};
|
|
|
|
/**
|
|
* Intel interrupt router control block
|
|
*
|
|
* Its members' value will be filled in based on device tree's input.
|
|
*
|
|
* @config: PIRQ_VIA_PCI or PIRQ_VIA_IBASE
|
|
* @link_base: link value base number
|
|
* @irq_mask: IRQ mask reprenting the 16 IRQs in 8259, bit N is 1 means
|
|
* IRQ N is available to be routed
|
|
* @lb_bdf: irq router's PCI bus/device/function number encoding
|
|
* @ibase: IBASE register block base address
|
|
* @actl_8bit: ACTL register width is 8-bit (for ICH series chipset)
|
|
* @actl_addr: ACTL register offset
|
|
*/
|
|
struct irq_router {
|
|
int config;
|
|
u32 link_base;
|
|
u16 irq_mask;
|
|
u32 bdf;
|
|
u32 ibase;
|
|
bool actl_8bit;
|
|
int actl_addr;
|
|
};
|
|
|
|
struct pirq_routing {
|
|
int bdf;
|
|
int pin;
|
|
int pirq;
|
|
};
|
|
|
|
/* PIRQ link number and value conversion */
|
|
#define LINK_V2N(link, base) (link - base)
|
|
#define LINK_N2V(link, base) (link + base)
|
|
|
|
#define PIRQ_BITMAP 0xdef8
|
|
|
|
/**
|
|
* irq_router_common_init() - Perform common x86 interrupt init
|
|
*
|
|
* This creates the PIRQ routing table and routes the IRQs
|
|
*/
|
|
int irq_router_common_init(struct udevice *dev);
|
|
|
|
#endif /* _ARCH_IRQ_H_ */
|