From nobody Tue Nov 26 14:24:26 2024 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of groups.io designates 66.175.222.12 as permitted sender) client-ip=66.175.222.12; envelope-from=bounce+27952+52162+1787277+3901457@groups.io; helo=web01.groups.io; Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of groups.io designates 66.175.222.12 as permitted sender) smtp.mailfrom=bounce+27952+52162+1787277+3901457@groups.io ARC-Seal: i=1; a=rsa-sha256; t=1576148124; cv=none; d=zohomail.com; s=zohoarc; b=XkQfoyYEiqMsZvQA8ZyNSpxpjtmA5TgPsYyS00AxjEvQyYzpvctUwcUNVZjh9WmF2wMfxgildeI9LYL6GLugm3ky+Im0krMGgkROSWH6jGPBFT/mKANVL3bShRa3wbJyWVTNy9ZavKtOb/0DASXmtOviOUKHoNR8SulcC/xgr5Y= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1576148124; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Id:List-Unsubscribe:MIME-Version:Message-ID:Reply-To:References:Sender:Subject:To; bh=/BJ0nfo9WDl8AfCmPWCYxSZMPbcHL1XlO44nrtLWp04=; b=ZeHEqYKlhRhV/h/IkPs+vostexDYj5Bl1Bv9OGhL2EvgsBSAQRnUWCGI17nUSXD4AEJL9vy7m+wPEBnd13tL3/axNWROU3/ZNBD6vRhdWoHFetDoh9y4GXdkXNTddTU4ykK3yg/bUdtrv/2Zi7BgbHoXkZvMgjEMhwXY2LaRMhA= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of groups.io designates 66.175.222.12 as permitted sender) smtp.mailfrom=bounce+27952+52162+1787277+3901457@groups.io Received: from web01.groups.io (web01.groups.io [66.175.222.12]) by mx.zohomail.com with SMTPS id 1576148124471941.9014979095117; Thu, 12 Dec 2019 02:55:24 -0800 (PST) Return-Path: X-Received: by 127.0.0.2 with SMTP id 6WdEYY1788612xxhOdrBx7Sp; Thu, 12 Dec 2019 02:55:24 -0800 X-Received: from mail-wr1-f65.google.com (mail-wr1-f65.google.com [209.85.221.65]) by mx.groups.io with SMTP id smtpd.web10.4875.1576148122687402532 for ; Thu, 12 Dec 2019 02:55:23 -0800 X-Received: by mail-wr1-f65.google.com with SMTP id z7so2173623wrl.13 for ; Thu, 12 Dec 2019 02:55:22 -0800 (PST) X-Gm-Message-State: jzxSKX5Umyo9kss1qBX6UICkx1787277AA= X-Google-Smtp-Source: APXvYqwioXOkrLlIv6NUbFVuTHmpgIU2/SHDRusYZvFu5tXvvbPuR9rhzB29ACIaFrd0Tj+BjUqdNw== X-Received: by 2002:a5d:4d8d:: with SMTP id b13mr5880451wru.6.1576148119356; Thu, 12 Dec 2019 02:55:19 -0800 (PST) X-Received: from localhost.localdomain ([84.203.45.230]) by smtp.gmail.com with ESMTPSA id o66sm1710595wmo.20.2019.12.12.02.55.17 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 12 Dec 2019 02:55:18 -0800 (PST) From: "Pete Batard" To: devel@edk2.groups.io Cc: ard.biesheuvel@linaro.org, leif.lindholm@linaro.org, philmd@redhat.com, lintonrjeremy@gmail.com Subject: [edk2-devel] [edk2-platforms][PATCH 2/4] Silicon/Bcm27xx: Add segment library to handle nonstandard ECAM Date: Thu, 12 Dec 2019 10:55:00 +0000 Message-Id: <20191212105502.8492-3-pete@akeo.ie> In-Reply-To: <20191212105502.8492-1-pete@akeo.ie> References: <20191212105502.8492-1-pete@akeo.ie> MIME-Version: 1.0 Precedence: Bulk List-Unsubscribe: Sender: devel@edk2.groups.io List-Id: Mailing-List: list devel@edk2.groups.io; contact devel+owner@edk2.groups.io Reply-To: devel@edk2.groups.io,pete@akeo.ie Content-Transfer-Encoding: quoted-printable DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=groups.io; q=dns/txt; s=20140610; t=1576148124; bh=k9Y+Uzq6kBpdhmYLzFj/RUku/+KChwqs4lcnx7a4T6w=; h=Cc:Date:From:Reply-To:Subject:To; b=sB+Cpm5Kl6kFRzk2SiSwvGBSx8K08BR8n4GkEO9/zhd5ZdWNYbLVAJHngU8Wxnz043+ MwIcKX8n/mrDdFSpnc8eWnAzQJIr6ghq6byxd3Jz80gmic9rwLyeuR1yiMnN6E4UUAKaR aKIhmjR5ya+d6wDfqI5YUll0dJM6tsaZtrY= X-ZohoMail-DKIM: pass (identity @groups.io) Content-Type: text/plain; charset="utf-8" From: Jeremy Linton Signed-off-by: Pete Batard --- Silicon/Broadcom/Bcm27xx/Library/Bcm2711PciSegmentLib/PciSegmentLib.c | = 1432 ++++++++++++++++++++ Silicon/Broadcom/Bcm27xx/Library/Bcm2711PciSegmentLib/PciSegmentLib.inf | = 34 + 2 files changed, 1466 insertions(+) diff --git a/Silicon/Broadcom/Bcm27xx/Library/Bcm2711PciSegmentLib/PciSegme= ntLib.c b/Silicon/Broadcom/Bcm27xx/Library/Bcm2711PciSegmentLib/PciSegmentL= ib.c new file mode 100644 index 000000000000..78232d233c5a --- /dev/null +++ b/Silicon/Broadcom/Bcm27xx/Library/Bcm2711PciSegmentLib/PciSegmentLib.c @@ -0,0 +1,1432 @@ +/** @file + * + * PCI Segment Library for Bcm2711 (RPi4) SoC + * + * Copyright (c) 2019, Jeremy Linton + * Copyright (c) 2017, Linaro, Ltd. All rights reserved.
+ * Copyright (c) 2007 - 2012, Intel Corporation. All rights reserved.
+ * + * SPDX-License-Identifier: BSD-2-Clause-Patent + * + **/ + +#include + +#include +#include +#include +#include +#include +#include + +typedef enum { + PciCfgWidthUint8 =3D 0, + PciCfgWidthUint16, + PciCfgWidthUint32, + PciCfgWidthMax +} PCI_CFG_WIDTH; + +/* + * This PCIe config space is unusual... + * The root port is the first bytes of the register space (offset 0) + * The individual devices are then selected by computing their BDF index + * and writing that into the CFG_INDEX register (offset 0x9000) + * the "ECAM" data is then read/writeable at CFG_DATA (offset 0x8000) + */ + +#define EFI_PCI_ADDR_BUS(bus) ((bus>>20) & 0xFF) /* Note PCI_SEGMENT_LI= B_ADDRESS */ +#define EFI_PCI_ADDR_DEV(dev) ((dev>>15) & 0x1F) +#define EFI_PCI_ADDR_FUN(fun) ((fun>>12) & 0x07) + +/** + Assert the validity of a PCI Segment address. + A valid PCI Segment address should not contain 1's in bits 28..31 and 48= ..63 + + @param A The address to validate. + @param M Additional bits to assert to be zero. + +**/ +#define ASSERT_INVALID_PCI_SEGMENT_ADDRESS(A,M) \ + ASSERT (((A) & (0xffff0000f0000000ULL | (M))) =3D=3D 0) + +/** + Internal worker function to obtain config space base address. + + @param Address The address that encodes the PCI Bus, Device, Function a= nd + Register. + + @return The value read from the PCI configuration register. + +**/ + +STATIC +UINT64 +PciSegmentLibGetConfigBase ( + IN UINT64 Address + ) +{ + STATIC UINT64 LastAccess =3D 0; /* Avoid repeat CFG_INDEX updates */ + UINT64 Base; + UINT64 Offset; + + Base =3D PCIE_REG_BASE; + Offset =3D Address & 0xFFF; /* Pick off the 4k register offset */ + Address &=3D 0xFFFFF000; /* Clear the offset leave only the B= DF */ + + /* The root port is at the base of the PCIe register space */ + if (Address !=3D 0) { + /* The current device is at CFG_DATA */ + Base +=3D PCIE_EXT_CFG_DATA; + if (LastAccess !=3D Address) { + UINT32 dev =3D EFI_PCI_ADDR_DEV (Address); + /* + * Scan things out directly rather than translating the "bus" to a d= evice, etc.. + * only we need to limit each bus to a single device. + */ + if (dev < 1) { + MmioWrite32 (PCIE_REG_BASE + PCIE_EXT_CFG_INDEX, Address); + LastAccess =3D Address; + } else { + LastAccess =3D 0; + return 0xFFFFFFFF; + } + } + } + return Base + Offset; +} + +/** + Internal worker function to read a PCI configuration register. + + @param Address The address that encodes the PCI Bus, Device, Function a= nd + Register. + @param Width The width of data to read + + @return The value read from the PCI configuration register. + +**/ +STATIC +UINT32 +PciSegmentLibReadWorker ( + IN UINT64 Address, + IN PCI_CFG_WIDTH Width + ) +{ + UINT64 Base; + UINT64 Ret =3D 0; + + Base =3D PciSegmentLibGetConfigBase (Address); + + if (Base=3D=3D0xFFFFFFFF) + return Base; + + switch (Width) { + case PciCfgWidthUint8: + Ret =3D MmioRead8 (Base); + break; + case PciCfgWidthUint16: + Ret =3D MmioRead16 (Base); + break; + case PciCfgWidthUint32: + Ret =3D MmioRead32 (Base); + break; + default: + ASSERT (FALSE); + } + return Ret; +} + +/** + Internal worker function to writes a PCI configuration register. + + @param Address The address that encodes the PCI Bus, Device, Function a= nd + Register. + @param Width The width of data to write + @param Data The value to write. + + @return The value written to the PCI configuration register. + +**/ +STATIC +UINT32 +PciSegmentLibWriteWorker ( + IN UINT64 Address, + IN PCI_CFG_WIDTH Width, + IN UINT32 Data + ) +{ + UINT64 Base; + + Base =3D PciSegmentLibGetConfigBase (Address); + + switch (Width) { + case PciCfgWidthUint8: + MmioWrite8 (Base, Data); + break; + case PciCfgWidthUint16: + MmioWrite16 (Base, Data); + break; + case PciCfgWidthUint32: + MmioWrite32 (Base, Data); + break; + default: + ASSERT (FALSE); + } + return Data; +} + +/** + Register a PCI device so PCI configuration registers may be accessed aft= er + SetVirtualAddressMap(). + + If any reserved bits in Address are set, then ASSERT(). + + @param Address The address that encodes the PCI Bus, Device, Function a= nd + Register. + + @retval RETURN_SUCCESS The PCI device was registered for runti= me access. + @retval RETURN_UNSUPPORTED An attempt was made to call this functi= on + after ExitBootServices(). + @retval RETURN_UNSUPPORTED The resources required to access the PC= I device + at runtime could not be mapped. + @retval RETURN_OUT_OF_RESOURCES There are not enough resources availabl= e to + complete the registration. + +**/ +RETURN_STATUS +EFIAPI +PciSegmentRegisterForRuntimeAccess ( + IN UINTN Address + ) +{ + ASSERT_INVALID_PCI_SEGMENT_ADDRESS (Address, 0); + return RETURN_UNSUPPORTED; +} + +/** + Reads an 8-bit PCI configuration register. + + Reads and returns the 8-bit PCI configuration register specified by Addr= ess. + This function must guarantee that all PCI read and write operations are = serialized. + + If any reserved bits in Address are set, then ASSERT(). + + @param Address The address that encodes the PCI Segment, Bus, Device,= Function, + and Register. + + @return The 8-bit PCI configuration register specified by Address. + +**/ +UINT8 +EFIAPI +PciSegmentRead8 ( + IN UINT64 Address + ) +{ + ASSERT_INVALID_PCI_SEGMENT_ADDRESS (Address, 0); + + return (UINT8) PciSegmentLibReadWorker (Address, PciCfgWidthUint8); +} + +/** + Writes an 8-bit PCI configuration register. + + Writes the 8-bit PCI configuration register specified by Address with th= e value specified by Value. + Value is returned. This function must guarantee that all PCI read and w= rite operations are serialized. + + If any reserved bits in Address are set, then ASSERT(). + + @param Address The address that encodes the PCI Segment, Bus, Devic= e, Function, and Register. + @param Value The value to write. + + @return The value written to the PCI configuration register. + +**/ +UINT8 +EFIAPI +PciSegmentWrite8 ( + IN UINT64 Address, + IN UINT8 Value + ) +{ + ASSERT_INVALID_PCI_SEGMENT_ADDRESS (Address, 0); + + return (UINT8) PciSegmentLibWriteWorker (Address, PciCfgWidthUint8, Valu= e); +} + +/** + Performs a bitwise OR of an 8-bit PCI configuration register with an 8-b= it value. + + Reads the 8-bit PCI configuration register specified by Address, + performs a bitwise OR between the read result and the value specified by= OrData, + and writes the result to the 8-bit PCI configuration register specified = by Address. + The value written to the PCI configuration register is returned. + This function must guarantee that all PCI read and write operations are = serialized. + + If any reserved bits in Address are set, then ASSERT(). + + @param Address The address that encodes the PCI Segment, Bus, Device,= Function, and Register. + @param OrData The value to OR with the PCI configuration register. + + @return The value written to the PCI configuration register. + +**/ +UINT8 +EFIAPI +PciSegmentOr8 ( + IN UINT64 Address, + IN UINT8 OrData + ) +{ + return PciSegmentWrite8 (Address, (UINT8) (PciSegmentRead8 (Address) | O= rData)); +} + +/** + Performs a bitwise AND of an 8-bit PCI configuration register with an 8-= bit value. + + Reads the 8-bit PCI configuration register specified by Address, + performs a bitwise AND between the read result and the value specified b= y AndData, + and writes the result to the 8-bit PCI configuration register specified = by Address. + The value written to the PCI configuration register is returned. + This function must guarantee that all PCI read and write operations are = serialized. + If any reserved bits in Address are set, then ASSERT(). + + @param Address The address that encodes the PCI Segment, Bus, Device,= Function, and Register. + @param AndData The value to AND with the PCI configuration register. + + @return The value written to the PCI configuration register. + +**/ +UINT8 +EFIAPI +PciSegmentAnd8 ( + IN UINT64 Address, + IN UINT8 AndData + ) +{ + return PciSegmentWrite8 (Address, (UINT8) (PciSegmentRead8 (Address) & A= ndData)); +} + +/** + Performs a bitwise AND of an 8-bit PCI configuration register with an 8-= bit value, + followed a bitwise OR with another 8-bit value. + + Reads the 8-bit PCI configuration register specified by Address, + performs a bitwise AND between the read result and the value specified b= y AndData, + performs a bitwise OR between the result of the AND operation and the va= lue specified by OrData, + and writes the result to the 8-bit PCI configuration register specified = by Address. + The value written to the PCI configuration register is returned. + This function must guarantee that all PCI read and write operations are = serialized. + + If any reserved bits in Address are set, then ASSERT(). + + @param Address The address that encodes the PCI Segment, Bus, Device,= Function, and Register. + @param AndData The value to AND with the PCI configuration register. + @param OrData The value to OR with the PCI configuration register. + + @return The value written to the PCI configuration register. + +**/ +UINT8 +EFIAPI +PciSegmentAndThenOr8 ( + IN UINT64 Address, + IN UINT8 AndData, + IN UINT8 OrData + ) +{ + return PciSegmentWrite8 (Address, (UINT8) ((PciSegmentRead8 (Address) & = AndData) | OrData)); +} + +/** + Reads a bit field of a PCI configuration register. + + Reads the bit field in an 8-bit PCI configuration register. The bit fiel= d is + specified by the StartBit and the EndBit. The value of the bit field is + returned. + + If any reserved bits in Address are set, then ASSERT(). + If StartBit is greater than 7, then ASSERT(). + If EndBit is greater than 7, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Address The PCI configuration register to read. + @param StartBit The ordinal of the least significant bit in the bit fi= eld. + Range 0..7. + @param EndBit The ordinal of the most significant bit in the bit fie= ld. + Range 0..7. + + @return The value of the bit field read from the PCI configuration regis= ter. + +**/ +UINT8 +EFIAPI +PciSegmentBitFieldRead8 ( + IN UINT64 Address, + IN UINTN StartBit, + IN UINTN EndBit + ) +{ + return BitFieldRead8 (PciSegmentRead8 (Address), StartBit, EndBit); +} + +/** + Writes a bit field to a PCI configuration register. + + Writes Value to the bit field of the PCI configuration register. The bit + field is specified by the StartBit and the EndBit. All other bits in the + destination PCI configuration register are preserved. The new value of t= he + 8-bit register is returned. + + If any reserved bits in Address are set, then ASSERT(). + If StartBit is greater than 7, then ASSERT(). + If EndBit is greater than 7, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + If Value is larger than the bitmask value range specified by StartBit an= d EndBit, then ASSERT(). + + @param Address The PCI configuration register to write. + @param StartBit The ordinal of the least significant bit in the bit fi= eld. + Range 0..7. + @param EndBit The ordinal of the most significant bit in the bit fie= ld. + Range 0..7. + @param Value The new value of the bit field. + + @return The value written back to the PCI configuration register. + +**/ +UINT8 +EFIAPI +PciSegmentBitFieldWrite8 ( + IN UINT64 Address, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT8 Value + ) +{ + return PciSegmentWrite8 ( + Address, + BitFieldWrite8 (PciSegmentRead8 (Address), StartBit, EndBit, Va= lue) + ); +} + +/** + Reads a bit field in an 8-bit PCI configuration, performs a bitwise OR, = and + writes the result back to the bit field in the 8-bit port. + + Reads the 8-bit PCI configuration register specified by Address, perform= s a + bitwise OR between the read result and the value specified by + OrData, and writes the result to the 8-bit PCI configuration register + specified by Address. The value written to the PCI configuration registe= r is + returned. This function must guarantee that all PCI read and write opera= tions + are serialized. Extra left bits in OrData are stripped. + + If any reserved bits in Address are set, then ASSERT(). + If StartBit is greater than 7, then ASSERT(). + If EndBit is greater than 7, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + If OrData is larger than the bitmask value range specified by StartBit a= nd EndBit, then ASSERT(). + + @param Address The PCI configuration register to write. + @param StartBit The ordinal of the least significant bit in the bit fi= eld. + Range 0..7. + @param EndBit The ordinal of the most significant bit in the bit fie= ld. + Range 0..7. + @param OrData The value to OR with the PCI configuration register. + + @return The value written back to the PCI configuration register. + +**/ +UINT8 +EFIAPI +PciSegmentBitFieldOr8 ( + IN UINT64 Address, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT8 OrData + ) +{ + return PciSegmentWrite8 ( + Address, + BitFieldOr8 (PciSegmentRead8 (Address), StartBit, EndBit, OrDat= a) + ); +} + +/** + Reads a bit field in an 8-bit PCI configuration register, performs a bit= wise + AND, and writes the result back to the bit field in the 8-bit register. + + Reads the 8-bit PCI configuration register specified by Address, perform= s a + bitwise AND between the read result and the value specified by AndData, = and + writes the result to the 8-bit PCI configuration register specified by + Address. The value written to the PCI configuration register is returned. + This function must guarantee that all PCI read and write operations are + serialized. Extra left bits in AndData are stripped. + + If any reserved bits in Address are set, then ASSERT(). + If StartBit is greater than 7, then ASSERT(). + If EndBit is greater than 7, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + If AndData is larger than the bitmask value range specified by StartBit = and EndBit, then ASSERT(). + + @param Address The PCI configuration register to write. + @param StartBit The ordinal of the least significant bit in the bit fi= eld. + Range 0..7. + @param EndBit The ordinal of the most significant bit in the bit fie= ld. + Range 0..7. + @param AndData The value to AND with the PCI configuration register. + + @return The value written back to the PCI configuration register. + +**/ +UINT8 +EFIAPI +PciSegmentBitFieldAnd8 ( + IN UINT64 Address, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT8 AndData + ) +{ + return PciSegmentWrite8 ( + Address, + BitFieldAnd8 (PciSegmentRead8 (Address), StartBit, EndBit, AndD= ata) + ); +} + +/** + Reads a bit field in an 8-bit port, performs a bitwise AND followed by a + bitwise OR, and writes the result back to the bit field in the + 8-bit port. + + Reads the 8-bit PCI configuration register specified by Address, perform= s a + bitwise AND followed by a bitwise OR between the read result and + the value specified by AndData, and writes the result to the 8-bit PCI + configuration register specified by Address. The value written to the PCI + configuration register is returned. This function must guarantee that al= l PCI + read and write operations are serialized. Extra left bits in both AndDat= a and + OrData are stripped. + + If any reserved bits in Address are set, then ASSERT(). + If StartBit is greater than 7, then ASSERT(). + If EndBit is greater than 7, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + If AndData is larger than the bitmask value range specified by StartBit = and EndBit, then ASSERT(). + If OrData is larger than the bitmask value range specified by StartBit a= nd EndBit, then ASSERT(). + + @param Address The PCI configuration register to write. + @param StartBit The ordinal of the least significant bit in the bit fi= eld. + Range 0..7. + @param EndBit The ordinal of the most significant bit in the bit fie= ld. + Range 0..7. + @param AndData The value to AND with the PCI configuration register. + @param OrData The value to OR with the result of the AND operation. + + @return The value written back to the PCI configuration register. + +**/ +UINT8 +EFIAPI +PciSegmentBitFieldAndThenOr8 ( + IN UINT64 Address, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT8 AndData, + IN UINT8 OrData + ) +{ + return PciSegmentWrite8 ( + Address, + BitFieldAndThenOr8 (PciSegmentRead8 (Address), StartBit, EndBit= , AndData, OrData) + ); +} + +/** + Reads a 16-bit PCI configuration register. + + Reads and returns the 16-bit PCI configuration register specified by Add= ress. + This function must guarantee that all PCI read and write operations are = serialized. + + If any reserved bits in Address are set, then ASSERT(). + If Address is not aligned on a 16-bit boundary, then ASSERT(). + + @param Address The address that encodes the PCI Segment, Bus, Device,= Function, and Register. + + @return The 16-bit PCI configuration register specified by Address. + +**/ +UINT16 +EFIAPI +PciSegmentRead16 ( + IN UINT64 Address + ) +{ + ASSERT_INVALID_PCI_SEGMENT_ADDRESS (Address, 1); + + return (UINT16) PciSegmentLibReadWorker (Address, PciCfgWidthUint16); +} + +/** + Writes a 16-bit PCI configuration register. + + Writes the 16-bit PCI configuration register specified by Address with t= he value specified by Value. + Value is returned. This function must guarantee that all PCI read and w= rite operations are serialized. + + If any reserved bits in Address are set, then ASSERT(). + If Address is not aligned on a 16-bit boundary, then ASSERT(). + + @param Address The address that encodes the PCI Segment, Bus, Devic= e, Function, and Register. + @param Value The value to write. + + @return The parameter of Value. + +**/ +UINT16 +EFIAPI +PciSegmentWrite16 ( + IN UINT64 Address, + IN UINT16 Value + ) +{ + ASSERT_INVALID_PCI_SEGMENT_ADDRESS (Address, 1); + + return (UINT16) PciSegmentLibWriteWorker (Address, PciCfgWidthUint16, Va= lue); +} + +/** + Performs a bitwise OR of a 16-bit PCI configuration register with + a 16-bit value. + + Reads the 16-bit PCI configuration register specified by Address, perfor= ms a + bitwise OR between the read result and the value specified by + OrData, and writes the result to the 16-bit PCI configuration register + specified by Address. The value written to the PCI configuration registe= r is + returned. This function must guarantee that all PCI read and write opera= tions + are serialized. + + If any reserved bits in Address are set, then ASSERT(). + If Address is not aligned on a 16-bit boundary, then ASSERT(). + + @param Address The address that encodes the PCI Segment, Bus, Device, F= unction and + Register. + @param OrData The value to OR with the PCI configuration register. + + @return The value written back to the PCI configuration register. + +**/ +UINT16 +EFIAPI +PciSegmentOr16 ( + IN UINT64 Address, + IN UINT16 OrData + ) +{ + return PciSegmentWrite16 (Address, (UINT16) (PciSegmentRead16 (Address) = | OrData)); +} + +/** + Performs a bitwise AND of a 16-bit PCI configuration register with a 16-= bit value. + + Reads the 16-bit PCI configuration register specified by Address, + performs a bitwise AND between the read result and the value specified b= y AndData, + and writes the result to the 16-bit PCI configuration register specified= by Address. + The value written to the PCI configuration register is returned. + This function must guarantee that all PCI read and write operations are = serialized. + + If any reserved bits in Address are set, then ASSERT(). + If Address is not aligned on a 16-bit boundary, then ASSERT(). + + @param Address The address that encodes the PCI Segment, Bus, Device,= Function, and Register. + @param AndData The value to AND with the PCI configuration register. + + @return The value written to the PCI configuration register. + +**/ +UINT16 +EFIAPI +PciSegmentAnd16 ( + IN UINT64 Address, + IN UINT16 AndData + ) +{ + return PciSegmentWrite16 (Address, (UINT16) (PciSegmentRead16 (Address) = & AndData)); +} + +/** + Performs a bitwise AND of a 16-bit PCI configuration register with a 16-= bit value, + followed a bitwise OR with another 16-bit value. + + Reads the 16-bit PCI configuration register specified by Address, + performs a bitwise AND between the read result and the value specified b= y AndData, + performs a bitwise OR between the result of the AND operation and the va= lue specified by OrData, + and writes the result to the 16-bit PCI configuration register specified= by Address. + The value written to the PCI configuration register is returned. + This function must guarantee that all PCI read and write operations are = serialized. + + If any reserved bits in Address are set, then ASSERT(). + If Address is not aligned on a 16-bit boundary, then ASSERT(). + + @param Address The address that encodes the PCI Segment, Bus, Device,= Function, and Register. + @param AndData The value to AND with the PCI configuration register. + @param OrData The value to OR with the PCI configuration register. + + @return The value written to the PCI configuration register. + +**/ +UINT16 +EFIAPI +PciSegmentAndThenOr16 ( + IN UINT64 Address, + IN UINT16 AndData, + IN UINT16 OrData + ) +{ + return PciSegmentWrite16 (Address, (UINT16) ((PciSegmentRead16 (Address)= & AndData) | OrData)); +} + +/** + Reads a bit field of a PCI configuration register. + + Reads the bit field in a 16-bit PCI configuration register. The bit fiel= d is + specified by the StartBit and the EndBit. The value of the bit field is + returned. + + If any reserved bits in Address are set, then ASSERT(). + If Address is not aligned on a 16-bit boundary, then ASSERT(). + If StartBit is greater than 15, then ASSERT(). + If EndBit is greater than 15, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Address The PCI configuration register to read. + @param StartBit The ordinal of the least significant bit in the bit fi= eld. + Range 0..15. + @param EndBit The ordinal of the most significant bit in the bit fie= ld. + Range 0..15. + + @return The value of the bit field read from the PCI configuration regis= ter. + +**/ +UINT16 +EFIAPI +PciSegmentBitFieldRead16 ( + IN UINT64 Address, + IN UINTN StartBit, + IN UINTN EndBit + ) +{ + return BitFieldRead16 (PciSegmentRead16 (Address), StartBit, EndBit); +} + +/** + Writes a bit field to a PCI configuration register. + + Writes Value to the bit field of the PCI configuration register. The bit + field is specified by the StartBit and the EndBit. All other bits in the + destination PCI configuration register are preserved. The new value of t= he + 16-bit register is returned. + + If any reserved bits in Address are set, then ASSERT(). + If Address is not aligned on a 16-bit boundary, then ASSERT(). + If StartBit is greater than 15, then ASSERT(). + If EndBit is greater than 15, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + If Value is larger than the bitmask value range specified by StartBit an= d EndBit, then ASSERT(). + + @param Address The PCI configuration register to write. + @param StartBit The ordinal of the least significant bit in the bit fi= eld. + Range 0..15. + @param EndBit The ordinal of the most significant bit in the bit fie= ld. + Range 0..15. + @param Value The new value of the bit field. + + @return The value written back to the PCI configuration register. + +**/ +UINT16 +EFIAPI +PciSegmentBitFieldWrite16 ( + IN UINT64 Address, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT16 Value + ) +{ + return PciSegmentWrite16 ( + Address, + BitFieldWrite16 (PciSegmentRead16 (Address), StartBit, EndBit, = Value) + ); +} + +/** + Reads the 16-bit PCI configuration register specified by Address, + performs a bitwise OR between the read result and the value specified by= OrData, + and writes the result to the 16-bit PCI configuration register specified= by Address. + + If any reserved bits in Address are set, then ASSERT(). + If Address is not aligned on a 16-bit boundary, then ASSERT(). + If StartBit is greater than 15, then ASSERT(). + If EndBit is greater than 15, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + If OrData is larger than the bitmask value range specified by StartBit a= nd EndBit, then ASSERT(). + + @param Address The PCI configuration register to write. + @param StartBit The ordinal of the least significant bit in the bit fi= eld. + Range 0..15. + @param EndBit The ordinal of the most significant bit in the bit fie= ld. + Range 0..15. + @param OrData The value to OR with the PCI configuration register. + + @return The value written back to the PCI configuration register. + +**/ +UINT16 +EFIAPI +PciSegmentBitFieldOr16 ( + IN UINT64 Address, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT16 OrData + ) +{ + return PciSegmentWrite16 ( + Address, + BitFieldOr16 (PciSegmentRead16 (Address), StartBit, EndBit, OrD= ata) + ); +} + +/** + Reads a bit field in a 16-bit PCI configuration, performs a bitwise OR, + and writes the result back to the bit field in the 16-bit port. + + Reads the 16-bit PCI configuration register specified by Address, + performs a bitwise OR between the read result and the value specified by= OrData, + and writes the result to the 16-bit PCI configuration register specified= by Address. + The value written to the PCI configuration register is returned. + This function must guarantee that all PCI read and write operations are = serialized. + Extra left bits in OrData are stripped. + + If any reserved bits in Address are set, then ASSERT(). + If Address is not aligned on a 16-bit boundary, then ASSERT(). + If StartBit is greater than 7, then ASSERT(). + If EndBit is greater than 7, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + If AndData is larger than the bitmask value range specified by StartBit = and EndBit, then ASSERT(). + + @param Address The address that encodes the PCI Segment, Bus, Device,= Function, and Register. + @param StartBit The ordinal of the least significant bit in the bit fi= eld. + The ordinal of the least significant bit in a byte is = bit 0. + @param EndBit The ordinal of the most significant bit in the bit fie= ld. + The ordinal of the most significant bit in a byte is b= it 7. + @param AndData The value to AND with the read value from the PCI conf= iguration register. + + @return The value written to the PCI configuration register. + +**/ +UINT16 +EFIAPI +PciSegmentBitFieldAnd16 ( + IN UINT64 Address, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT16 AndData + ) +{ + return PciSegmentWrite16 ( + Address, + BitFieldAnd16 (PciSegmentRead16 (Address), StartBit, EndBit, An= dData) + ); +} + +/** + Reads a bit field in a 16-bit port, performs a bitwise AND followed by a + bitwise OR, and writes the result back to the bit field in the + 16-bit port. + + Reads the 16-bit PCI configuration register specified by Address, perfor= ms a + bitwise AND followed by a bitwise OR between the read result and + the value specified by AndData, and writes the result to the 16-bit PCI + configuration register specified by Address. The value written to the PCI + configuration register is returned. This function must guarantee that al= l PCI + read and write operations are serialized. Extra left bits in both AndDat= a and + OrData are stripped. + + If any reserved bits in Address are set, then ASSERT(). + If StartBit is greater than 15, then ASSERT(). + If EndBit is greater than 15, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + If AndData is larger than the bitmask value range specified by StartBit = and EndBit, then ASSERT(). + If OrData is larger than the bitmask value range specified by StartBit a= nd EndBit, then ASSERT(). + + @param Address The PCI configuration register to write. + @param StartBit The ordinal of the least significant bit in the bit fi= eld. + Range 0..15. + @param EndBit The ordinal of the most significant bit in the bit fie= ld. + Range 0..15. + @param AndData The value to AND with the PCI configuration register. + @param OrData The value to OR with the result of the AND operation. + + @return The value written back to the PCI configuration register. + +**/ +UINT16 +EFIAPI +PciSegmentBitFieldAndThenOr16 ( + IN UINT64 Address, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT16 AndData, + IN UINT16 OrData + ) +{ + return PciSegmentWrite16 ( + Address, + BitFieldAndThenOr16 (PciSegmentRead16 (Address), StartBit, EndB= it, AndData, OrData) + ); +} + +/** + Reads a 32-bit PCI configuration register. + + Reads and returns the 32-bit PCI configuration register specified by Add= ress. + This function must guarantee that all PCI read and write operations are = serialized. + + If any reserved bits in Address are set, then ASSERT(). + If Address is not aligned on a 32-bit boundary, then ASSERT(). + + @param Address The address that encodes the PCI Segment, Bus, Device,= Function, + and Register. + + @return The 32-bit PCI configuration register specified by Address. + +**/ +UINT32 +EFIAPI +PciSegmentRead32 ( + IN UINT64 Address + ) +{ + ASSERT_INVALID_PCI_SEGMENT_ADDRESS (Address, 3); + + return PciSegmentLibReadWorker (Address, PciCfgWidthUint32); +} + +/** + Writes a 32-bit PCI configuration register. + + Writes the 32-bit PCI configuration register specified by Address with t= he value specified by Value. + Value is returned. This function must guarantee that all PCI read and w= rite operations are serialized. + + If any reserved bits in Address are set, then ASSERT(). + If Address is not aligned on a 32-bit boundary, then ASSERT(). + + @param Address The address that encodes the PCI Segment, Bus, Devic= e, + Function, and Register. + @param Value The value to write. + + @return The parameter of Value. + +**/ +UINT32 +EFIAPI +PciSegmentWrite32 ( + IN UINT64 Address, + IN UINT32 Value + ) +{ + ASSERT_INVALID_PCI_SEGMENT_ADDRESS (Address, 3); + + return PciSegmentLibWriteWorker (Address, PciCfgWidthUint32, Value); +} + +/** + Performs a bitwise OR of a 32-bit PCI configuration register with a 32-b= it value. + + Reads the 32-bit PCI configuration register specified by Address, + performs a bitwise OR between the read result and the value specified by= OrData, + and writes the result to the 32-bit PCI configuration register specified= by Address. + The value written to the PCI configuration register is returned. + This function must guarantee that all PCI read and write operations are = serialized. + + If any reserved bits in Address are set, then ASSERT(). + If Address is not aligned on a 32-bit boundary, then ASSERT(). + + @param Address The address that encodes the PCI Segment, Bus, Device,= Function, and Register. + @param OrData The value to OR with the PCI configuration register. + + @return The value written to the PCI configuration register. + +**/ +UINT32 +EFIAPI +PciSegmentOr32 ( + IN UINT64 Address, + IN UINT32 OrData + ) +{ + return PciSegmentWrite32 (Address, PciSegmentRead32 (Address) | OrData); +} + +/** + Performs a bitwise AND of a 32-bit PCI configuration register with a 32-= bit value. + + Reads the 32-bit PCI configuration register specified by Address, + performs a bitwise AND between the read result and the value specified b= y AndData, + and writes the result to the 32-bit PCI configuration register specified= by Address. + The value written to the PCI configuration register is returned. + This function must guarantee that all PCI read and write operations are = serialized. + + If any reserved bits in Address are set, then ASSERT(). + If Address is not aligned on a 32-bit boundary, then ASSERT(). + + @param Address The address that encodes the PCI Segment, Bus, Device,= Function, + and Register. + @param AndData The value to AND with the PCI configuration register. + + @return The value written to the PCI configuration register. + +**/ +UINT32 +EFIAPI +PciSegmentAnd32 ( + IN UINT64 Address, + IN UINT32 AndData + ) +{ + return PciSegmentWrite32 (Address, PciSegmentRead32 (Address) & AndData); +} + +/** + Performs a bitwise AND of a 32-bit PCI configuration register with a 32-= bit value, + followed a bitwise OR with another 32-bit value. + + Reads the 32-bit PCI configuration register specified by Address, + performs a bitwise AND between the read result and the value specified b= y AndData, + performs a bitwise OR between the result of the AND operation and the va= lue specified by OrData, + and writes the result to the 32-bit PCI configuration register specified= by Address. + The value written to the PCI configuration register is returned. + This function must guarantee that all PCI read and write operations are = serialized. + + If any reserved bits in Address are set, then ASSERT(). + If Address is not aligned on a 32-bit boundary, then ASSERT(). + + @param Address The address that encodes the PCI Segment, Bus, Device,= Function, + and Register. + @param AndData The value to AND with the PCI configuration register. + @param OrData The value to OR with the PCI configuration register. + + @return The value written to the PCI configuration register. + +**/ +UINT32 +EFIAPI +PciSegmentAndThenOr32 ( + IN UINT64 Address, + IN UINT32 AndData, + IN UINT32 OrData + ) +{ + return PciSegmentWrite32 (Address, (PciSegmentRead32 (Address) & AndData= ) | OrData); +} + +/** + Reads a bit field of a PCI configuration register. + + Reads the bit field in a 32-bit PCI configuration register. The bit fiel= d is + specified by the StartBit and the EndBit. The value of the bit field is + returned. + + If any reserved bits in Address are set, then ASSERT(). + If Address is not aligned on a 32-bit boundary, then ASSERT(). + If StartBit is greater than 31, then ASSERT(). + If EndBit is greater than 31, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + + @param Address The PCI configuration register to read. + @param StartBit The ordinal of the least significant bit in the bit fi= eld. + Range 0..31. + @param EndBit The ordinal of the most significant bit in the bit fie= ld. + Range 0..31. + + @return The value of the bit field read from the PCI configuration regis= ter. + +**/ +UINT32 +EFIAPI +PciSegmentBitFieldRead32 ( + IN UINT64 Address, + IN UINTN StartBit, + IN UINTN EndBit + ) +{ + return BitFieldRead32 (PciSegmentRead32 (Address), StartBit, EndBit); +} + +/** + Writes a bit field to a PCI configuration register. + + Writes Value to the bit field of the PCI configuration register. The bit + field is specified by the StartBit and the EndBit. All other bits in the + destination PCI configuration register are preserved. The new value of t= he + 32-bit register is returned. + + If any reserved bits in Address are set, then ASSERT(). + If Address is not aligned on a 32-bit boundary, then ASSERT(). + If StartBit is greater than 31, then ASSERT(). + If EndBit is greater than 31, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + If Value is larger than the bitmask value range specified by StartBit an= d EndBit, then ASSERT(). + + @param Address The PCI configuration register to write. + @param StartBit The ordinal of the least significant bit in the bit fi= eld. + Range 0..31. + @param EndBit The ordinal of the most significant bit in the bit fie= ld. + Range 0..31. + @param Value The new value of the bit field. + + @return The value written back to the PCI configuration register. + +**/ +UINT32 +EFIAPI +PciSegmentBitFieldWrite32 ( + IN UINT64 Address, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT32 Value + ) +{ + return PciSegmentWrite32 ( + Address, + BitFieldWrite32 (PciSegmentRead32 (Address), StartBit, EndBit, = Value) + ); +} + +/** + Reads a bit field in a 32-bit PCI configuration, performs a bitwise OR, = and + writes the result back to the bit field in the 32-bit port. + + Reads the 32-bit PCI configuration register specified by Address, perfor= ms a + bitwise OR between the read result and the value specified by + OrData, and writes the result to the 32-bit PCI configuration register + specified by Address. The value written to the PCI configuration registe= r is + returned. This function must guarantee that all PCI read and write opera= tions + are serialized. Extra left bits in OrData are stripped. + + If any reserved bits in Address are set, then ASSERT(). + If StartBit is greater than 31, then ASSERT(). + If EndBit is greater than 31, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + If OrData is larger than the bitmask value range specified by StartBit a= nd EndBit, then ASSERT(). + + @param Address The PCI configuration register to write. + @param StartBit The ordinal of the least significant bit in the bit fi= eld. + Range 0..31. + @param EndBit The ordinal of the most significant bit in the bit fie= ld. + Range 0..31. + @param OrData The value to OR with the PCI configuration register. + + @return The value written back to the PCI configuration register. + +**/ +UINT32 +EFIAPI +PciSegmentBitFieldOr32 ( + IN UINT64 Address, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT32 OrData + ) +{ + return PciSegmentWrite32 ( + Address, + BitFieldOr32 (PciSegmentRead32 (Address), StartBit, EndBit, OrD= ata) + ); +} + +/** + Reads a bit field in a 32-bit PCI configuration register, performs a bit= wise + AND, and writes the result back to the bit field in the 32-bit register. + + + Reads the 32-bit PCI configuration register specified by Address, perfor= ms a bitwise + AND between the read result and the value specified by AndData, and writ= es the result + to the 32-bit PCI configuration register specified by Address. The value= written to + the PCI configuration register is returned. This function must guarante= e that all PCI + read and write operations are serialized. Extra left bits in AndData ar= e stripped. + If any reserved bits in Address are set, then ASSERT(). + If Address is not aligned on a 32-bit boundary, then ASSERT(). + If StartBit is greater than 31, then ASSERT(). + If EndBit is greater than 31, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + If AndData is larger than the bitmask value range specified by StartBit = and EndBit, then ASSERT(). + + @param Address The PCI configuration register to write. + @param StartBit The ordinal of the least significant bit in the bit fi= eld. + Range 0..31. + @param EndBit The ordinal of the most significant bit in the bit fie= ld. + Range 0..31. + @param AndData The value to AND with the PCI configuration register. + + @return The value written back to the PCI configuration register. + +**/ +UINT32 +EFIAPI +PciSegmentBitFieldAnd32 ( + IN UINT64 Address, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT32 AndData + ) +{ + return PciSegmentWrite32 ( + Address, + BitFieldAnd32 (PciSegmentRead32 (Address), StartBit, EndBit, An= dData) + ); +} + +/** + Reads a bit field in a 32-bit port, performs a bitwise AND followed by a + bitwise OR, and writes the result back to the bit field in the + 32-bit port. + + Reads the 32-bit PCI configuration register specified by Address, perfor= ms a + bitwise AND followed by a bitwise OR between the read result and + the value specified by AndData, and writes the result to the 32-bit PCI + configuration register specified by Address. The value written to the PCI + configuration register is returned. This function must guarantee that al= l PCI + read and write operations are serialized. Extra left bits in both AndDat= a and + OrData are stripped. + + If any reserved bits in Address are set, then ASSERT(). + If StartBit is greater than 31, then ASSERT(). + If EndBit is greater than 31, then ASSERT(). + If EndBit is less than StartBit, then ASSERT(). + If AndData is larger than the bitmask value range specified by StartBit = and EndBit, then ASSERT(). + If OrData is larger than the bitmask value range specified by StartBit a= nd EndBit, then ASSERT(). + + @param Address The PCI configuration register to write. + @param StartBit The ordinal of the least significant bit in the bit fi= eld. + Range 0..31. + @param EndBit The ordinal of the most significant bit in the bit fie= ld. + Range 0..31. + @param AndData The value to AND with the PCI configuration register. + @param OrData The value to OR with the result of the AND operation. + + @return The value written back to the PCI configuration register. + +**/ +UINT32 +EFIAPI +PciSegmentBitFieldAndThenOr32 ( + IN UINT64 Address, + IN UINTN StartBit, + IN UINTN EndBit, + IN UINT32 AndData, + IN UINT32 OrData + ) +{ + return PciSegmentWrite32 ( + Address, + BitFieldAndThenOr32 (PciSegmentRead32 (Address), StartBit, EndB= it, AndData, OrData) + ); +} + +/** + Reads a range of PCI configuration registers into a caller supplied buff= er. + + Reads the range of PCI configuration registers specified by StartAddress= and + Size into the buffer specified by Buffer. This function only allows the = PCI + configuration registers from a single PCI function to be read. Size is + returned. When possible 32-bit PCI configuration read cycles are used to= read + from StartAdress to StartAddress + Size. Due to alignment restrictions, = 8-bit + and 16-bit PCI configuration read cycles may be used at the beginning an= d the + end of the range. + + If any reserved bits in StartAddress are set, then ASSERT(). + If ((StartAddress & 0xFFF) + Size) > 0x1000, then ASSERT(). + If Size > 0 and Buffer is NULL, then ASSERT(). + + @param StartAddress The starting address that encodes the PCI Segment,= Bus, + Device, Function and Register. + @param Size The size in bytes of the transfer. + @param Buffer The pointer to a buffer receiving the data read. + + @return Size + +**/ +UINTN +EFIAPI +PciSegmentReadBuffer ( + IN UINT64 StartAddress, + IN UINTN Size, + OUT VOID *Buffer + ) +{ + UINTN ReturnValue; + + ASSERT_INVALID_PCI_SEGMENT_ADDRESS (StartAddress, 0); + ASSERT (((StartAddress & 0xFFF) + Size) <=3D 0x1000); + + if (Size =3D=3D 0) { + return Size; + } + + ASSERT (Buffer !=3D NULL); + + // + // Save Size for return + // + ReturnValue =3D Size; + + if ((StartAddress & BIT0) !=3D 0) { + // + // Read a byte if StartAddress is byte aligned + // + *(volatile UINT8 *)Buffer =3D PciSegmentRead8 (StartAddress); + StartAddress +=3D sizeof (UINT8); + Size -=3D sizeof (UINT8); + Buffer =3D (UINT8*)Buffer + 1; + } + + if (Size >=3D sizeof (UINT16) && (StartAddress & BIT1) !=3D 0) { + // + // Read a word if StartAddress is word aligned + // + WriteUnaligned16 (Buffer, PciSegmentRead16 (StartAddress)); + StartAddress +=3D sizeof (UINT16); + Size -=3D sizeof (UINT16); + Buffer =3D (UINT16*)Buffer + 1; + } + + while (Size >=3D sizeof (UINT32)) { + // + // Read as many double words as possible + // + WriteUnaligned32 (Buffer, PciSegmentRead32 (StartAddress)); + StartAddress +=3D sizeof (UINT32); + Size -=3D sizeof (UINT32); + Buffer =3D (UINT32*)Buffer + 1; + } + + if (Size >=3D sizeof (UINT16)) { + // + // Read the last remaining word if exist + // + WriteUnaligned16 (Buffer, PciSegmentRead16 (StartAddress)); + StartAddress +=3D sizeof (UINT16); + Size -=3D sizeof (UINT16); + Buffer =3D (UINT16*)Buffer + 1; + } + + if (Size >=3D sizeof (UINT8)) { + // + // Read the last remaining byte if exist + // + *(volatile UINT8 *)Buffer =3D PciSegmentRead8 (StartAddress); + } + + return ReturnValue; +} + + +/** + Copies the data in a caller supplied buffer to a specified range of PCI + configuration space. + + Writes the range of PCI configuration registers specified by StartAddres= s and + Size from the buffer specified by Buffer. This function only allows the = PCI + configuration registers from a single PCI function to be written. Size is + returned. When possible 32-bit PCI configuration write cycles are used to + write from StartAdress to StartAddress + Size. Due to alignment restrict= ions, + 8-bit and 16-bit PCI configuration write cycles may be used at the begin= ning + and the end of the range. + + If any reserved bits in StartAddress are set, then ASSERT(). + If ((StartAddress & 0xFFF) + Size) > 0x1000, then ASSERT(). + If Size > 0 and Buffer is NULL, then ASSERT(). + + @param StartAddress The starting address that encodes the PCI Segment,= Bus, + Device, Function and Register. + @param Size The size in bytes of the transfer. + @param Buffer The pointer to a buffer containing the data to wri= te. + + @return The parameter of Size. + +**/ +UINTN +EFIAPI +PciSegmentWriteBuffer ( + IN UINT64 StartAddress, + IN UINTN Size, + IN VOID *Buffer + ) +{ + UINTN ReturnValue; + + ASSERT_INVALID_PCI_SEGMENT_ADDRESS (StartAddress, 0); + ASSERT (((StartAddress & 0xFFF) + Size) <=3D 0x1000); + + if (Size =3D=3D 0) { + return 0; + } + + ASSERT (Buffer !=3D NULL); + + // The Bcm/Rpi has a single cfg which can be mapped + // to any given device on the bus, which means we need to remap + // it basically everytime a new config access is done + + // + // Save Size for return + // + ReturnValue =3D Size; + + if ((StartAddress & BIT0) !=3D 0) { + // + // Write a byte if StartAddress is byte aligned + // + PciSegmentWrite8 (StartAddress, *(UINT8*)Buffer); + StartAddress +=3D sizeof (UINT8); + Size -=3D sizeof (UINT8); + Buffer =3D (UINT8*)Buffer + 1; + } + + if (Size >=3D sizeof (UINT16) && (StartAddress & BIT1) !=3D 0) { + // + // Write a word if StartAddress is word aligned + // + PciSegmentWrite16 (StartAddress, ReadUnaligned16 (Buffer)); + StartAddress +=3D sizeof (UINT16); + Size -=3D sizeof (UINT16); + Buffer =3D (UINT16*)Buffer + 1; + } + + while (Size >=3D sizeof (UINT32)) { + // + // Write as many double words as possible + // + PciSegmentWrite32 (StartAddress, ReadUnaligned32 (Buffer)); + StartAddress +=3D sizeof (UINT32); + Size -=3D sizeof (UINT32); + Buffer =3D (UINT32*)Buffer + 1; + } + + if (Size >=3D sizeof (UINT16)) { + // + // Write the last remaining word if exist + // + PciSegmentWrite16 (StartAddress, ReadUnaligned16 (Buffer)); + StartAddress +=3D sizeof (UINT16); + Size -=3D sizeof (UINT16); + Buffer =3D (UINT16*)Buffer + 1; + } + + if (Size >=3D sizeof (UINT8)) { + // + // Write the last remaining byte if exist + // + PciSegmentWrite8 (StartAddress, *(UINT8*)Buffer); + } + + return ReturnValue; +} diff --git a/Silicon/Broadcom/Bcm27xx/Library/Bcm2711PciSegmentLib/PciSegme= ntLib.inf b/Silicon/Broadcom/Bcm27xx/Library/Bcm2711PciSegmentLib/PciSegmen= tLib.inf new file mode 100644 index 000000000000..2ee38c06368a --- /dev/null +++ b/Silicon/Broadcom/Bcm27xx/Library/Bcm2711PciSegmentLib/PciSegmentLib.i= nf @@ -0,0 +1,34 @@ +## @file +# PCI Segment Library for Bcm2711 (RPi4) SoC +# +# Copyright (c) 2019, Jeremy Linton +# Copyright (c) 2017, Linaro Ltd. All rights reserved.
+# Copyright (c) 2007 - 2014, Intel Corporation. All rights reserved.
+# +# SPDX-License-Identifier: BSD-2-Clause-Patent +# +## + +[Defines] + INF_VERSION =3D 0x0001001B + BASE_NAME =3D PciSegmentLib + FILE_GUID =3D 74fe3f9e-0040-11ea-a7bf-5254005675a0 + MODULE_TYPE =3D BASE + VERSION_STRING =3D 1.0 + LIBRARY_CLASS =3D PciSegmentLib + +[Sources] + PciSegmentLib.c + +[Packages] + MdePkg/MdePkg.dec + Silicon/Broadcom/Bcm27xx/Bcm27xx.dec + +[LibraryClasses] + BaseLib + DebugLib + IoLib + PcdLib + +[FixedPcd] + gBcm27xxTokenSpaceGuid.PcdBcm27xxPciRegBase --=20 2.21.0.windows.1 -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#52162): https://edk2.groups.io/g/devel/message/52162 Mute This Topic: https://groups.io/mt/68271365/1787277 Group Owner: devel+owner@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [importer@patchew.org] -=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-=3D-