diff options
Diffstat (limited to 'src/VBox/Devices/PC/BIOS/pciutil.c')
| -rw-r--r-- | src/VBox/Devices/PC/BIOS/pciutil.c | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/src/VBox/Devices/PC/BIOS/pciutil.c b/src/VBox/Devices/PC/BIOS/pciutil.c new file mode 100644 index 00000000..49ff0877 --- /dev/null +++ b/src/VBox/Devices/PC/BIOS/pciutil.c @@ -0,0 +1,186 @@ +/* $Id: pciutil.c $ */ +/** @file + * Utility routines for calling the PCI BIOS. + */ + +/* + * Copyright (C) 2011-2019 Oracle Corporation + * + * This file is part of VirtualBox Open Source Edition (OSE), as + * available from http://www.virtualbox.org. This file is free software; + * you can redistribute it and/or modify it under the terms of the GNU + * General Public License (GPL) as published by the Free Software + * Foundation, in version 2 as it comes in the "COPYING" file of the + * VirtualBox OSE distribution. VirtualBox OSE is distributed in the + * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. + */ + +#include <stdint.h> +#include <string.h> +#include "biosint.h" +#include "inlines.h" + +/** PCI BIOS functions. */ +#define PCIBIOS_ID 0xb1 +#define PCIBIOS_PCI_BIOS_PRESENT 0x01 +#define PCIBIOS_FIND_PCI_DEVICE 0x02 +#define PCIBIOS_FIND_CLASS_CODE 0x03 +#define PCIBIOS_GENERATE_SPECIAL_CYCLE 0x06 +#define PCIBIOS_READ_CONFIG_BYTE 0x08 +#define PCIBIOS_READ_CONFIG_WORD 0x09 +#define PCIBIOS_READ_CONFIG_DWORD 0x0a +#define PCIBIOS_WRITE_CONFIG_BYTE 0x0b +#define PCIBIOS_WRITE_CONFIG_WORD 0x0c +#define PCIBIOS_WRITE_CONFIG_DWORD 0x0d +#define PCIBIOS_GET_IRQ_ROUTING_OPTIONS 0x0e +#define PCIBIOS_SET_PCI_IRQ 0x0f + +/** Status codes. */ +#define SUCCESSFUL 0x00 +#define FUNC_NOT_SUPPORTED 0x81 +#define BAD_VENDOR_ID 0x83 +#define DEVICE_NOT_FOUND 0x86 +#define BAD_REGISTER_NUMBER 0x87 +#define SET_FAILED 0x88 +#define BUFFER_TOO_SMALL 0x89 + + +#if VBOX_BIOS_CPU >= 80386 +/* Warning: Destroys high bits of ECX. */ +uint16_t pci_find_class(uint16_t op, uint32_t dev_class, uint16_t index); +# pragma aux pci_find_class = \ + ".386" \ + "shl ecx, 16" \ + "mov cx, dx" \ + "int 0x1a" \ + "cmp ah, 0" \ + "je found" \ + "mov bx, 0xffff" \ + "found:" \ + parm [ax] [cx dx] [si] value [bx]; +#endif + +uint16_t pci_find_dev(uint16_t op, uint16_t dev_id, uint16_t ven_id, uint16_t index); +#pragma aux pci_find_dev = \ + "int 0x1a" \ + "cmp ah, 0" \ + "je found" \ + "mov bx, 0xffff" \ + "found:" \ + parm [ax] [cx] [dx] [si] value [bx]; + +uint8_t pci_read_cfgb(uint16_t op, uint16_t bus_dev_fn, uint16_t reg); +#pragma aux pci_read_cfgb = \ + "int 0x1a" \ + parm [ax] [bx] [di] value [cl]; + +uint16_t pci_read_cfgw(uint16_t op, uint16_t bus_dev_fn, uint16_t reg); +#pragma aux pci_read_cfgw = \ + "int 0x1a" \ + parm [ax] [bx] [di] value [cx]; + +#if VBOX_BIOS_CPU >= 80386 +/* Warning: Destroys high bits of ECX. */ +uint32_t pci_read_cfgd(uint16_t op, uint16_t bus_dev_fn, uint16_t reg); +# pragma aux pci_read_cfgd = \ + ".386" \ + "int 0x1a" \ + "mov ax, cx" \ + "shr ecx, 16" \ + parm [ax] [bx] [di] value [cx ax]; +#endif + +uint8_t pci_write_cfgb(uint16_t op, uint16_t bus_dev_fn, uint16_t reg, uint8_t val); +#pragma aux pci_write_cfgb = \ + "int 0x1a" \ + parm [ax] [bx] [di] [cl]; + +uint8_t pci_write_cfgw(uint16_t op, uint16_t bus_dev_fn, uint16_t reg, uint16_t val); +#pragma aux pci_write_cfgw = \ + "int 0x1a" \ + parm [ax] [bx] [di] [cx]; + +#if VBOX_BIOS_CPU >= 80386 +/* Warning: Destroys high bits of ECX. */ +uint8_t pci_write_cfgd(uint16_t op, uint16_t bus_dev_fn, uint16_t reg, uint32_t val); +# pragma aux pci_write_cfgd = \ + ".386" \ + "xchg cx, dx" \ + "shl ecx, 16" \ + "mov cx, dx" \ + "int 0x1a" \ + parm [ax] [bx] [di] [dx cx]; +#endif + + +/** + * Returns the bus/device/function of a PCI device with + * the given class code. + * + * @returns bus/device/fn in a 16-bit integer where + * where the upper byte contains the bus number + * and lower one the device and function number. + * 0xffff if no device was found. + * @param dev_class The PCI class code to search for. + */ +uint16_t pci_find_classcode(uint32_t dev_class) +{ +#if VBOX_BIOS_CPU >= 80386 + return pci_find_class((PCIBIOS_ID << 8) | PCIBIOS_FIND_CLASS_CODE, dev_class, 0); +#else + return UINT16_C(0xffff); +#endif +} + +/** + * Returns the bus/device/function of a PCI device with + * the given vendor and device id. + * + * @returns bus/device/fn in one 16bit integer where + * where the upper byte contains the bus number + * and lower one the device and function number. + * 0xffff if no device was found. + * @param v_id The vendor ID. + * @param d_id The device ID. + */ +uint16_t pci_find_device(uint16_t v_id, uint16_t d_id) +{ + return pci_find_dev((PCIBIOS_ID << 8) | PCIBIOS_FIND_PCI_DEVICE, d_id, v_id, 0); +} + +uint32_t pci_read_config_byte(uint8_t bus, uint8_t dev_fn, uint8_t reg) +{ + return pci_read_cfgb((PCIBIOS_ID << 8) | PCIBIOS_READ_CONFIG_BYTE, (bus << 8) | dev_fn, reg); +} + +uint32_t pci_read_config_word(uint8_t bus, uint8_t dev_fn, uint8_t reg) +{ + return pci_read_cfgw((PCIBIOS_ID << 8) | PCIBIOS_READ_CONFIG_WORD, (bus << 8) | dev_fn, reg); +} + +uint32_t pci_read_config_dword(uint8_t bus, uint8_t dev_fn, uint8_t reg) +{ +#if VBOX_BIOS_CPU >= 80386 + return pci_read_cfgd((PCIBIOS_ID << 8) | PCIBIOS_READ_CONFIG_DWORD, (bus << 8) | dev_fn, reg); +#else + return pci_read_cfgw((PCIBIOS_ID << 8) | PCIBIOS_READ_CONFIG_WORD, (bus << 8) | dev_fn, reg) + || ((uint32_t)pci_read_cfgw((PCIBIOS_ID << 8) | PCIBIOS_READ_CONFIG_WORD, (bus << 8) | dev_fn, reg + 2) << 16); +#endif +} + +void pci_write_config_word(uint8_t bus, uint8_t dev_fn, uint8_t reg, uint16_t val) +{ + pci_write_cfgw((PCIBIOS_ID << 8) | PCIBIOS_WRITE_CONFIG_WORD, (bus << 8) | dev_fn, reg, val); +} + +#if 0 /* Disabled to save space because they are not needed. Might become useful in the future. */ +void pci_write_config_byte(uint8_t bus, uint8_t dev_fn, uint8_t reg, uint8_t val) +{ + pci_write_cfgb((PCIBIOS_ID << 8) | PCIBIOS_WRITE_CONFIG_BYTE, (bus << 8) | dev_fn, reg, val); +} + +void pci_write_config_dword(uint8_t bus, uint8_t dev_fn, uint8_t reg, uint32_t val) +{ + pci_write_cfgd((PCIBIOS_ID << 8) | PCIBIOS_WRITE_CONFIG_DWORD, (bus << 8) | dev_fn, reg, val); +} +#endif /* 0 */ |