[原创]EFI application：PCI read & write 程序源码

kaurohy

/*
# Z5 M! ~9 y1 M2 \( G; ~7 u * myfileio.c
& \: p8 E) W. _, i1 v * Apps
* i8 Q4 n+ \7 X% h) w' r */
& |# d+ P4 U! M  |) T# c3 l
#include "efi.h"
5 i0 A% G3 K+ O2 S0 E#include "efilib.h"
& g/ c5 I1 r9 v) q/ a
) ]* x: G0 k0 Z6 S9 C/ K& s#define FILE_ATTRIB_CREATENEW         EFI_FILE_MODE_READ  | EFI_FILE_MODE_WRITE | EFI_FILE_MODE_CREATE

& E6 g. t7 u. p* Ustatic EFI_STATUS WaitForKeyOrReset(VOID)
% V$ L9 f# F2 }7 Q{
    EFI_STATUS          Status;
4 D0 K: \! n5 C  ^8 O+ B    EFI_INPUT_KEY       key;
    UINTN               index;
   
    for(;;) {
2 ]6 P0 P, D2 r7 L! f# ]        Status = ST->ConIn->ReadKeyStroke(ST->ConIn, &key);
        if (Status == EFI_NOT_READY)
4 n) S, B- r4 L" O# K            BS->WaitForEvent(1, &ST->ConIn->WaitForKey, &index);
  G  n% ^% v- k" R" j* z" o. R8 s$ t4 z        else
- a2 \0 n! M  f% D+ @/ A            break;
    }
2 _  m' O: N# u1 b. I    if (!EFI_ERROR(Status)) {
        if (key.ScanCode == SCAN_ESC)
: c+ W) |7 \) S            RT->ResetSystem(EfiResetCold, EFI_SUCCESS, 0, NULL);
2 F. X- b: c& }1 i& J1 O7 T    }
   
    return Status;
0 F. s* ?# H7 w# ]}

+ Y* z3 O9 C9 z* \; [EFI_STATUS
" a: L; n$ ^, k7 X& }( M0 r* fEFIAPI
MyfileioMain (IN EFI_HANDLE           ImageHandle,
             IN EFI_SYSTEM_TABLE     *SystemTable)
{
    EFI_STATUS                Status;
4 q% ^. f% D5 t+ \0 ^0 r    EFI_HANDLE                *DestAddr;       
5 r# x* e8 b; k+ a+ r# C: G    EFI_LOADED_IMAGE        *FileHandle01;
4 c7 p3 @8 G) i, ~' `& }    EFI_DEVICE_PATH        *FileHandle02;       
+ e/ r; K, i) h) z, ?5 ^( X    EFI_FILE_IO_INTERFACE        *FileHandle03;
    EFI_FILE                *FileHandle04;
    EFI_FILE                *FileHandle05;
    CHAR16                *FileName;
+ x1 u+ F( e1 a8 @9 @5 D        CHAR16      *BufferA, *BufferB, *BufferC, *Space_Key;
0 g8 C( X7 g) z# _9 T3 ]- r5 I    UINTN                BufferSize = 8, BufferSizeKeySpace = 2;
) E. \. |  B- ]0 W" g8 Y4 G    int         Bit0, Bit1, Key_Space;       

% n6 p5 Q0 L% k( K$ P* j    FileName = L"NewFile.txt";
        Space_Key = L" ";
       
/ `- a, I2 B( ?: l        BufferA = L"ABCD";
        BufferB = L"EFGH";
. P7 j) [; a( O* q8 _% m2 J        BufferC = L"IJKL";

        Bit0 = 0xff;
4 Q% O" K! ?& g/ N$ q% {% i+ {        Bit1 = 0xfe;
       
! X; B; Q: N+ t9 A+ O0 Y$ O        Key_Space = 0x0020;
* z4 V0 l( R7 y2 |0 U$ K9 ^4 r       
2 a% t. S) P( p% R% B* m) x3 d    InitializeLib (ImageHandle, SystemTable);       
/ [; M7 Q! D* Z* c: g) s4 L
+ C. d3 K' k# M( R    DestAddr = AllocatePool (BufferSize);       
4 {' S% ]+ \: Z5 a% S) o& V- K
    Print (L"Value of Bit0 is %x\n", Bit0);
    Print (L"Value of Bit1 is %x\n", Bit1);       

* Q1 f. G. U7 g% ^) b       
5 ], j0 a: X6 W" L/ T% X0 {    Status = BS->HandleProtocol(ImageHandle, &LoadedImageProtocol, (VOID*)&FileHandle01);
' f' J) a( X* |: A0 A    if (EFI_ERROR(Status)) {
0 t; s/ o8 J) d$ N2 C4 @        Print (L"Could not obtain Image, FileHandle01 err code is %x\n",Status);
        return EFI_LOAD_ERROR;
" j5 R7 q% L& v8 N9 J! \$ q    }

    Status = BS->HandleProtocol(FileHandle01->DeviceHandle,&DevicePathProtocol,(VOID*)&FileHandle02);
; \+ ~" ?6 ~! q$ g1 ]7 y* b& V    if (EFI_ERROR(Status)) {
6 I6 H4 O( [$ M+ C! Q$ x            Print (L"Could not obtain Device Path, FileHandle02 err code is %x\n",Status);
            return EFI_LOAD_ERROR;
/ y' F& n' K4 m% }2 l! _9 [% M        }       
       
. K& W* |2 _& l    Status = BS->HandleProtocol (FileHandle01->DeviceHandle,&FileSystemProtocol,(VOID*)&FileHandle03);
4 T$ M$ ^& f9 [( \    if (EFI_ERROR(Status)) {
            Print (L"Could not obtain File System, FileHandle03 err code is %x\n",Status);
# o: k5 r, f) ^: L8 A; Y: |7 g" f! U            return EFI_LOAD_ERROR;
9 G+ Z1 J" O: [" x$ e( N# [0 H1 U, y        }

    Status = FileHandle03->OpenVolume(FileHandle03, &FileHandle04);
    if (EFI_ERROR(Status)) {
        Print (L"Could not open volume, FileHandle04 err code is %x\n",Status);
        return EFI_LOAD_ERROR;
8 F% M4 p* k* w/ M# \8 B    }               
5 k) {3 Y0 ~/ j- K               
$ b( ~& L; J3 z    Status = FileHandle04->Open(FileHandle04, &FileHandle05, FileName, FILE_ATTRIB_CREATENEW, 0x20);
  K  ^7 K9 ]+ G  k  f6 S    if (EFI_ERROR(Status)) {
        Print (L"Could not open file, FileHandle05 err code is %x\n",Status);
" e" M; W& J  ?7 [$ E1 X, M( V        return EFI_LOAD_ERROR;
2 @- [% ^0 e; m% }$ G" o. F  \- _    }
8 p% C; P' `1 C5 {       
0 r- K" C; n/ u    Status = FileHandle05->SetPosition(FileHandle05, 0);       
# K% m5 v3 H% L5 C# S7 x" }    if (EFI_ERROR(Status)) {
        Print (L"Could not do SetPositioon to the file, FileHandle05 err code is %x\n",Status);
        return EFI_SUCCESS;
    }
# \# q1 T1 ~: o  ?       
7 a& e. F: ^. O) W( Y' o' ]3 N    Status = FileHandle05->Write(FileHandle05, &BufferSize, &Bit0);
$ x: f' B% s6 b/ V2 w# S9 w2 h6 X        Print (L"File Buffersize is %x\n\n", BufferSize);
    if (EFI_ERROR(Status)) {
, {& }& J* r) U$ s- L: p# y        Print (L"Could not write file, FileHandle05 err code is %x\n\n",Status);
9 I4 v- v0 ?" [, o! h- o3 o* O        return EFI_SUCCESS;
; o) e  {/ K  X/ D2 \& U" S8 E8 K8 h    }       
+ @/ d% g! W, B/ C$ q" x
. F! {6 e  q. \6 |    Status = FileHandle05->SetPosition(FileHandle05, 1);       
    if (EFI_ERROR(Status)) {
        Print (L"Could not do SetPositioon to the file, FileHandle05 err code is %x\n",Status);
        return EFI_SUCCESS;
    }
       
( N5 K/ E# C: r& P! q, ^+ q    Status = FileHandle05->Write(FileHandle05, &BufferSize, &Bit1);
7 @/ i- h6 Q: m+ _, a        Print (L"File Buffersize is %x\n\n", BufferSize);
    if (EFI_ERROR(Status)) {
/ X! O' W. N. p; l. ]+ g) F! a        Print (L"Could not write file, FileHandle05 err code is %x\n\n",Status);
! m: L& Z& x" U+ r# _        return EFI_SUCCESS;
4 @% d& z. Z, Q9 d* y1 y! |) Q; [    }               
5 W" o3 a; |; L; \/ I9 V2 I% X" ~; K( E       
    Status = FileHandle05->SetPosition(FileHandle05, 2);       
9 B( W8 @! t; n+ ~& _  W    if (EFI_ERROR(Status)) {
# {7 X" s$ L; H6 E        Print (L"Could not do SetPositioon to the file, FileHandle05 err code is %x\n",Status);
        return EFI_SUCCESS;
8 y$ W- w# W+ R$ A    }
       
    Status = FileHandle05->Write(FileHandle05, &BufferSize, BufferA);
6 {& C* z$ z! y5 @, p7 A. R! E- v  j        Print (L"File Buffersize is %x\n\n", BufferSize);
    if (EFI_ERROR(Status)) {
/ |3 i5 x* `2 \! o5 v7 s3 S        Print (L"Could not write file, FileHandle05 err code is %x\n\n",Status);
        return EFI_SUCCESS;
3 `0 D8 D" ]$ w1 ]8 {    }       
5 J9 [, k+ R& c! C
9 k' M' D7 _# U* ~//--------------------------------------------------------------------------------------------------------------------------------------------------------------->>>
    Print (L"Before Read FileHandle05 file Data of BufferB is %s\n\n",BufferB);
    Status = FileHandle05->SetPosition(FileHandle05, 2);       
" p7 q% Q5 z1 H, g3 M. ]    if (EFI_ERROR(Status)) {
8 D: J( w. A% \2 {1 g4 K        Print (L"Could not do SetPositioon to the file, FileHandle05 err code is %x\n",Status);
' h4 Q: m0 s, ^- V/ H8 Q        return EFI_SUCCESS;
" ?8 k# c, l3 W    }

    Status = FileHandle05->Read(FileHandle05, &BufferSize, BufferB);
& F/ U  h! Y7 M- h    if (EFI_ERROR(Status)) {
        Print (L"Could not read file, FileHandle05 err code is %x\n",Status);
        return EFI_SUCCESS;
    }       
        Print(L"1. After Read FileHandle05 file of Data of BufferSize is %d and Data of BufferB is %s\n\n", BufferSize, BufferB);
//---------------------------------------------------------------------------------------------------------------------------------------------------------------<<<

    Status = FileHandle05->SetPosition(FileHandle05, 10);       
    if (EFI_ERROR(Status)) {
        Print (L"Could not do SetPositioon to the file, FileHandle05 err code is %x\n",Status);
  I5 u; |* W- i% }8 {  {        return EFI_SUCCESS;
    }
2 F0 K  _/ h# l% Z" B* o; o. b" R  H       
) b* o+ N9 G1 M7 ~6 Y0 {    Status = FileHandle05->Write(FileHandle05, &BufferSizeKeySpace, Space_Key);
+ j) ]+ ?9 A6 C6 m* m    if (EFI_ERROR(Status)) {
        Print (L"Could not write file, FileHandle05 err code is %x\n",Status);
        return EFI_SUCCESS;
    }

7 N" D& J! Q$ L    Status = FileHandle05->SetPosition(FileHandle05, 12);       
    if (EFI_ERROR(Status)) {
, F* O# T" Z( Z% r8 Q% U# f% n        Print (L"Could not do SetPositioon to the file, FileHandle05 err code is %x\n",Status);
        return EFI_SUCCESS;
    }
: W- ]' m. @6 c) N4 y& {; B7 G       
    Status = FileHandle05->Write(FileHandle05, &BufferSizeKeySpace, Space_Key);
, P. |9 C# M: R+ J: w- w    if (EFI_ERROR(Status)) {
3 r- A& S5 w0 h5 f8 F& F        Print (L"Could not write file, FileHandle05 err code is %x\n",Status);
4 J) @# F2 `  a5 Q        return EFI_SUCCESS;
% M: g: v2 Q( |2 A  e    }

+ h* h7 G* Z6 T/ o( w) ?  A% C4 L    Status = FileHandle05->SetPosition(FileHandle05, 14);       
+ |8 h5 D! D1 y; p1 D- j/ @, M+ ?3 V    if (EFI_ERROR(Status)) {
+ ^  k2 _) N& d9 V- g        Print (L"Could not do SetPositioon to the file, FileHandle05 err code is %x\n",Status);
) t4 x7 g8 u& G2 f+ H% @; k, C        return EFI_SUCCESS;
8 g1 l& l2 v4 D' Q% q    }
       
$ O2 `" Z( c1 \( S; l    Status = FileHandle05->Write(FileHandle05, &BufferSizeKeySpace, Space_Key);
    if (EFI_ERROR(Status)) {
! [" `$ K7 u9 f$ o( ~        Print (L"Could not write file, FileHandle05 err code is %x\n",Status);
# w7 T, t9 F5 \6 i- U        return EFI_SUCCESS;
    }

/ c0 }( Z( J; X9 d5 ~0 s2 `    Status = FileHandle05->SetPosition(FileHandle05, 16);       
6 d6 i* }- ^" X9 y  Y    if (EFI_ERROR(Status)) {
        Print (L"Could not do SetPositioon to the file, FileHandle05 err code is %x\n",Status);
+ r: t/ R+ ~: N+ P6 K) h        return EFI_SUCCESS;
6 [7 C8 \' [& N7 W) T+ b7 k    }
) o3 X) |2 X2 k# @9 d) c3 ]5 U* z       
) |2 o& z6 c+ W    Status = FileHandle05->Write(FileHandle05, &BufferSizeKeySpace, Space_Key);
    if (EFI_ERROR(Status)) {
        Print (L"Could not write file, FileHandle05 err code is %x\n",Status);
        return EFI_SUCCESS;
    }       
! ~" o) I# C; m* z2 u* m3 k
//---------------------------------------------------------------------------------------------------------------------------------------------------------------
0 m3 f+ m& m# }* I) Z  W; f2 h
    Status = FileHandle05->SetPosition(FileHandle05, 18);       
. p% f5 B$ Z+ a- E    if (EFI_ERROR(Status)) {
        Print (L"Could not do SetPositioon to the file, FileHandle05 err code is %x\n",Status);
        return EFI_SUCCESS;
7 X  E* r3 i' b' o4 a1 m0 Y$ ]8 ]8 N    }
       
    Status = FileHandle05->Write(FileHandle05, &BufferSize, BufferC);
6 N  @4 ]  n# H$ v! i    if (EFI_ERROR(Status)) {
3 P. a# {+ X2 g) n6 ]8 U" \        Print (L"Could not write file, FileHandle05 err code is %x\n",Status);
/ a( g# X1 U% ]; H3 Z" i        return EFI_SUCCESS;
& i3 |  t8 j* t. U    }       
" w5 e7 ]: K: `3 E8 |  F+ V       
    FreePool(DestAddr);       

% p  l1 V) `3 J    Status = FileHandle05->Close(FileHandle05);
! x% I- v  T7 k, q" S, }, L    if (EFI_ERROR(Status)) {
) T+ m( A3 X) h/ m+ g        Print (L"Could not close file, FileHandle05 err code is %x\n",Status);
3 G- U' k5 o. z  j3 @$ D        return EFI_SUCCESS;
: S+ D  k# g# _1 J# W    }
4 `, W- E! A% i       
$ i6 ^, v' u' }; X. v" b    Print(L"File Name = %s has already been created.\n", FileName);
6 S+ w/ b: J9 I0 _. ]
    Print(L"\nPress ESC to reboot or any other key to return control to the firmware.\n\n");
7 @) P. c" z# ]9 \1 e    WaitForKeyOrReset();

    return Status;
}

chenhy

//**********************************************************************
3 E$ t% P& w7 E/ L1 V9 r9 A: T2 X//**********************************************************************
  P. [$ l0 G" ~8 J3 C//** Demo code for PCI configuration space I/O access program **
//** By Lawrence 2009/11/20 @Taiwan**                          
//**********************************************************************
//**********************************************************************

#include "efi.h"
#include "efilib.h"
) f1 \2 `) ^8 U/ V# S) ?% l, D
#define        Not_Found_Me        0x00000000
: M6 G, S" @4 o#define        Found_Me        0x00000001
- j, K- _5 [) B1 R8 F7 f; O7 h' F# a
$ \4 q5 ?6 q8 G* k  E* Xstatic EFI_STATUS WaitForKeyOrReset(VOID)
# m) g# G6 f+ w7 r{
) `0 V3 L# C# m% {' s* M9 J1 t+ l    EFI_STATUS          Status;
    EFI_INPUT_KEY       key;
$ w! t, J" F% f* b- E6 g: G    UINTN               index;
   
    for(;;) {
0 Q7 ]: M! y6 Y+ |        Status = ST->ConIn->ReadKeyStroke(ST->ConIn, &key);
8 M' C8 A0 z5 v' y  {) {        if (Status == EFI_NOT_READY)
3 o% N# K+ m7 m, k( o  @            BS->WaitForEvent(1, &ST->ConIn->WaitForKey, &index);
        else
            break;
    }
    if (!EFI_ERROR(Status)) {
        if (key.ScanCode == SCAN_ESC)
            RT->ResetSystem(EfiResetCold, EFI_SUCCESS, 0, NULL);
- H9 W3 z4 O! Z4 r* @& U# Z0 V    }
   
% b. L* k6 E0 ?6 f3 r; q    return Status;
; o( r7 e5 S# i+ Z; A# `& Y}
" a: @" B- J7 i& q5 g$ R- u1 A. [
- X  F2 F1 L' B4 w9 RUINTN
* i4 r1 |3 ?7 u3 t. BAccessPciConfig (
# n& ?4 U) m! `) m+ R    IN  EFI_PCI_IO_PROTOCOL              *PCI_DEVICE_TARGET
    )
{
* w! V3 O) Z" c: S8 a$ T        UINT8  i;
$ P. o4 h9 F; {' p        UINTN  PCI_ATTR[4];
        UINT8  PCI_REG[4], pci_offset=0;

        //get device attr
        PCI_DEVICE_TARGET->GetLocation(PCI_DEVICE_TARGET,PCI_ATTR,PCI_ATTR+1,PCI_ATTR+2,PCI_ATTR+3);       
% H- c% R" C/ \( z% p5 J2 u    if ((PCI_ATTR[1] == 0x00) && (PCI_ATTR[2] == 0x1e) && (PCI_ATTR[3] == 0x00)){
, S3 r8 C9 c/ j3 G" x. ], H          Print (L"Device found at BUS = %02x         DEV= %02x        FUN= %02x  \n",PCI_ATTR[1],PCI_ATTR[2],PCI_ATTR[3]);
          ST->ConOut->SetAttribute (ST->ConOut, EFI_TEXT_ATTR (EFI_GREEN, EFI_BLACK));       
" t7 z& n" e! M/ A8 V) o- L          //print register value
          for (i = 0;i < 4;i++)
* [# A7 Q7 Z5 M6 j) v          {
        PCI_DEVICE_TARGET->Pci.Read (PCI_DEVICE_TARGET,0,pci_offset,4,PCI_REG);
                Print(L"Register0x%d value = %02x \n",i, PCI_REG);
          }
4 [5 c; g) ]; B) Q          Print(L"\n");          
          ST->ConOut->SetAttribute (ST->ConOut, EFI_TEXT_ATTR (EFI_WHITE, EFI_BLACK));                  
          return Found_Me;
    }

+ }+ o6 j1 N8 ^        return Not_Found_Me;
0 z6 r1 i$ T1 V4 X2 r5 W}

EFI_STATUS
InitializePciApplication (
0 b# s" I8 i0 d7 }8 }    IN EFI_HANDLE           ImageHandle,
4 ~+ \  e" k$ p    IN EFI_SYSTEM_TABLE     *SystemTable
    )
/ _$ d$ w- a  P3 d* X3 {* J) t{
  EFI_STATUS              Status;
8 v! @8 f# @& F% N* V: ?8 s" C  EFI_HANDLE              *Handle;
$ ?9 x8 F  s8 n: V  UINTN                   BufferSize, Result;
  UINTN                   NoHandles, Index;
8 M8 D' x2 M1 G& A' @: @  EFI_PCI_IO_PROTOCOL          *PCI_DEVICE_TARGET;

    //
    // Initialize the Library.
( [& B; `; ?, B& R6 b# F( S5 ^    //
    InitializeLib (ImageHandle, SystemTable);
4 t/ j4 n0 n; i. U0 n# S    //
    // Find the PCI driver
- O1 G, V: b7 ?9 s, f" ?+ G    //
! f/ e) S2 d  f; p3 r) b    Handle = NULL;
    BufferSize = 1;
2 a4 I1 t9 \+ m' i+ a( V    do
# ]- [. Z9 z8 h6 u  C7 U0 d6 p: o    {
      if (Handle)
- x  s; d- b1 s# K* T      {
        FreePool (Handle);
      }
  _) u% F8 x( J4 B               
7 q9 b  `4 [5 y9 n  R, O5 j      Handle = AllocatePool (BufferSize);
. b6 d5 P$ d6 B9 F3 _) R, k      Status = BS->LocateHandle (ByProtocol, &PciIoProtocol, NULL, &BufferSize, Handle);

    } while (Status == EFI_BUFFER_TOO_SMALL);
    ASSERT (!EFI_ERROR(Status));
7 L" Z. w5 N* V6 ]# s3 L8 |  }0 ^: n
    NoHandles  = BufferSize / sizeof(EFI_HANDLE);
* Z7 j* L; x  S8 k2 v; }9 ~+ |    Index = 0;
6 N. \" i5 M$ {9 d# d8 f. Y    ST->ConOut->ClearScreen (ST->ConOut);
    Result = Not_Found_Me;       
( q- g2 w* Y) w9 I    do
    {       
- L! ]+ {& p$ U/ \1 K        if(Index == NoHandles - 1)
         Index=0;
          else
( m' ^7 O2 h6 A; D+ t2 ]) N9 h    Status = BS->HandleProtocol (Handle[Index], &PciIoProtocol, (VOID*)&PCI_DEVICE_TARGET);
8 K4 v" t1 C% x; d7 V; I        Print(L"THIS IS DEVICE %d \n",Index);
    if (!EFI_ERROR(Status))
    {
          Result = AccessPciConfig(PCI_DEVICE_TARGET);
//-          Print(L"Again now Result is %x \n",Result);          
    }
6 j3 u6 _+ V0 M& K    Index++;               
8 {( ~$ p3 ^, \0 w5 j    } while(Result == Not_Found_Me);
* y7 m4 F, K! s       
1 O/ S4 s0 _8 [. h+ N        Print(L"Please hit any key to exit this image.");       
    WaitForSingleEvent (ST->ConIn->WaitForKey, 0);
               
    return EFI_SUCCESS;
1 ^* `) c* w( Y}

xjf2088

小弟对你有如滔滔江水。。。

dhua

都是强人。向你们学习！

shaopy

楼主 好厉害 我接受bios tranning 两周也没有写出这样的的底层程式！楼主强人哈！学习了！

蓝色永恒

景仰一下，哈哈

zywwin

新手，学习