contiki/cpu/x86/drivers/legacy_pc/pci.h

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/*
* Copyright (C) 2015, Intel Corporation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef CPU_X86_DRIVERS_LEGACY_PC_PCI_H_
#define CPU_X86_DRIVERS_LEGACY_PC_PCI_H_
#include <stdint.h>
#include "helpers.h"
#include <stdlib.h>
#include "prot-domains.h"
/** PCI configuration register identifier for Base Address Registers */
#define PCI_CONFIG_REG_BAR0 0x10
#define PCI_CONFIG_REG_BAR1 0x14
/** PCI Interrupt Routing is mapped using Interrupt Queue Agents */
typedef enum {
IRQAGENT0,
IRQAGENT1,
IRQAGENT2,
IRQAGENT3
} IRQAGENT;
/** PCI Interupt Pins */
typedef enum {
INTA,
INTB,
INTC,
INTD
} INTR_PIN;
/**
* PCI based interrupts PIRQ[A:H] are then available for consumption by either
* the 8259 PICs or the IO-APIC.
*/
typedef enum {
PIRQA,
PIRQB,
PIRQC,
PIRQD,
PIRQE,
PIRQF,
PIRQG,
PIRQH,
} PIRQ;
/** PCI command register bit to enable bus mastering */
#define PCI_CMD_2_BUS_MST_EN BIT(2)
/** PCI command register bit to enable memory space */
#define PCI_CMD_1_MEM_SPACE_EN BIT(1)
/**
* PCI configuration address
*
* Refer to Intel Quark SoC X1000 Datasheet, Section 5.5 for more details on
* PCI configuration register access.
*/
typedef union pci_config_addr {
struct {
/** Register/offset number. Least-significant two bits should be zero. */
uint32_t reg_off : 8;
uint32_t func : 3; /**< Function number */
uint32_t dev : 5; /**< Device number */
uint32_t bus : 8; /**< Bus number */
uint32_t : 7;
/** Must be set to perform PCI configuration access. */
uint32_t en_mapping : 1;
};
uint32_t raw;
} pci_config_addr_t;
uint32_t pci_config_read(pci_config_addr_t addr);
void pci_config_write(pci_config_addr_t addr, uint32_t data);
void pci_command_enable(pci_config_addr_t addr, uint32_t flags);
typedef dom_client_data_t pci_driver_t;
void pci_init(pci_driver_t ATTR_KERN_ADDR_SPACE *c_this,
pci_config_addr_t pci_addr,
size_t mmio_sz,
uintptr_t meta,
size_t meta_sz);
void pci_irq_agent_set_pirq(IRQAGENT agent, INTR_PIN pin, PIRQ pirq);
void pci_pirq_set_irq(PIRQ pirq, uint8_t irq, uint8_t route_to_legacy);
void pci_root_complex_init(void);
void pci_root_complex_lock(void);
#define PCI_MMIO_READL(c_this, dest, reg_addr) \
MMIO_READL(dest, \
*((volatile uint32_t ATTR_MMIO_ADDR_SPACE *) \
(((uintptr_t)PROT_DOMAINS_MMIO(c_this)) + (reg_addr))))
#define PCI_MMIO_WRITEL(c_this, reg_addr, src) \
MMIO_WRITEL(*((volatile uint32_t ATTR_MMIO_ADDR_SPACE *) \
(((uintptr_t)PROT_DOMAINS_MMIO(c_this)) + (reg_addr))), \
src)
#endif /* CPU_X86_DRIVERS_LEGACY_PC_PCI_H_ */