158 lines
4.8 KiB
C
158 lines
4.8 KiB
C
/******************************************************************************
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* Copyright (c) 2004, 2008 IBM Corporation
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* All rights reserved.
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* This program and the accompanying materials
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* are made available under the terms of the BSD License
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* which accompanies this distribution, and is available at
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* http://www.opensource.org/licenses/bsd-license.php
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*
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* Contributors:
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* IBM Corporation - initial implementation
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*****************************************************************************/
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#ifndef DEVICE_LIB_H
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#define DEVICE_LIB_H
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#include <stdint.h>
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#include <cpu.h>
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#include "of.h"
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#include <stdio.h>
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// a Expansion Header Struct as defined in Plug and Play BIOS Spec 1.0a Chapter 3.2
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typedef struct {
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char signature[4]; // signature
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uint8_t structure_revision;
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uint8_t length; // in 16 byte blocks
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uint16_t next_header_offset; // offset to next Expansion Header as 16bit little-endian value, as offset from the start of the Expansion ROM
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uint8_t reserved;
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uint8_t checksum; // the sum of all bytes of the Expansion Header must be 0
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uint32_t device_id; // PnP Device ID as 32bit little-endian value
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uint16_t p_manufacturer_string; //16bit little-endian offset from start of Expansion ROM
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uint16_t p_product_string; //16bit little-endian offset from start of Expansion ROM
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uint8_t device_base_type;
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uint8_t device_sub_type;
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uint8_t device_if_type;
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uint8_t device_indicators;
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// the following vectors are all 16bit little-endian offsets from start of Expansion ROM
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uint16_t bcv; // Boot Connection Vector
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uint16_t dv; // Disconnect Vector
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uint16_t bev; // Bootstrap Entry Vector
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uint16_t reserved_2;
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uint16_t sriv; // Static Resource Information Vector
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} __attribute__ ((__packed__)) exp_header_struct_t;
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// a PCI Data Struct as defined in PCI 2.3 Spec Chapter 6.3.1.2
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typedef struct {
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uint8_t signature[4]; // signature, the String "PCIR"
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uint16_t vendor_id;
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uint16_t device_id;
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uint16_t reserved;
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uint16_t pci_ds_length; // PCI Data Structure Length, 16bit little-endian value
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uint8_t pci_ds_revision;
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uint8_t class_code[3];
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uint16_t img_length; // length of the Exp.ROM Image, 16bit little-endian value in 512 bytes
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uint16_t img_revision;
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uint8_t code_type;
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uint8_t indicator;
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uint16_t reserved_2;
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} __attribute__ ((__packed__)) pci_data_struct_t;
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typedef struct {
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uint8_t bus;
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uint8_t devfn;
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uint64_t puid;
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phandle_t phandle;
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ihandle_t ihandle;
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// store the address of the BAR that is used to simulate
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// legacy VGA memory accesses
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uint64_t vmem_addr;
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uint64_t vmem_size;
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// used to buffer I/O Accesses, that do not access the I/O Range of the device...
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// 64k might be overkill, but we can buffer all I/O accesses...
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uint8_t io_buffer[64 * 1024];
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uint16_t pci_vendor_id;
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uint16_t pci_device_id;
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// translated address of the "PC-Compatible" Expansion ROM Image for this device
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uint64_t img_addr;
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uint32_t img_size; // size of the Expansion ROM Image (read from the PCI Data Structure)
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} device_t;
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typedef struct {
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uint8_t info;
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uint8_t bus;
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uint8_t devfn;
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uint8_t cfg_space_offset;
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uint64_t address;
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uint64_t address_offset;
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uint64_t size;
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} __attribute__ ((__packed__)) translate_address_t;
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// array to store address translations for this
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// device. Needed for faster address translation, so
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// not every I/O or Memory Access needs to call translate_address_dev
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// and access the device tree
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// 6 BARs, 1 Exp. ROM, 1 Cfg.Space, and 3 Legacy
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// translations are supported... this should be enough for
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// most devices... for VGA it is enough anyways...
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translate_address_t translate_address_array[11];
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// index of last translate_address_array entry
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// set by get_dev_addr_info function
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uint8_t taa_last_entry;
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device_t bios_device;
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uint8_t dev_init(char *device_name);
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// NOTE: for dev_check_exprom to work, dev_init MUST be called first!
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uint8_t dev_check_exprom(void);
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uint8_t dev_translate_address(uint64_t * addr);
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/* endianness swap functions for 16 and 32 bit words
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* copied from axon_pciconfig.c
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*/
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static inline void
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out32le(void *addr, uint32_t val)
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{
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asm volatile ("stwbrx %0, 0, %1"::"r" (val), "r"(addr));
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}
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static inline uint32_t
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in32le(void *addr)
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{
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uint32_t val;
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const uint32_t *zaddr = addr;
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asm volatile ("lwbrx %0, %y1" : "=r"(val) : "Z"(*zaddr));
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return val;
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}
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static inline void
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out16le(void *addr, uint16_t val)
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{
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asm volatile ("sthbrx %0, 0, %1"::"r" (val), "r"(addr));
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}
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static inline uint16_t
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in16le(void *addr)
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{
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uint16_t val;
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const uint16_t *zaddr = addr;
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asm volatile ("lhbrx %0, %y1" : "=r"(val) : "Z"(*zaddr));
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return val;
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}
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/* debug function, dumps HID1 and HID4 to detect whether caches are on/off */
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static inline void
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dumpHID(void)
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{
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uint64_t hid;
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//HID1 = 1009
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__asm__ __volatile__("mfspr %0, 1009":"=r"(hid));
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printf("HID1: %016llx\n", hid);
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//HID4 = 1012
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__asm__ __volatile__("mfspr %0, 1012":"=r"(hid));
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printf("HID4: %016llx\n", hid);
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}
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#endif
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