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

kaurohy

/*
* myfileio.c
' b7 |; j; {6 P8 g) Q2 |& \ * Apps
*/
3 ^7 m$ e% L, A0 _; E! U1 l" F3 Q
#include "efi.h"
#include "efilib.h"
! ?9 Q! E0 l3 P9 d- o) T7 A
#define FILE_ATTRIB_CREATENEW         EFI_FILE_MODE_READ  | EFI_FILE_MODE_WRITE | EFI_FILE_MODE_CREATE

8 N" Y4 l* _0 g' S; g6 A  bstatic EFI_STATUS WaitForKeyOrReset(VOID)
1 ^: c) H  l7 B6 \+ b+ G, T{
- v6 Q1 C7 A2 @4 R" |" s    EFI_STATUS          Status;
    EFI_INPUT_KEY       key;
    UINTN               index;
   
    for(;;) {
+ D/ e; J% j! i6 _( s0 j% ]  P1 i        Status = ST->ConIn->ReadKeyStroke(ST->ConIn, &key);
8 j9 S( l: M3 e% U5 C% u5 I        if (Status == EFI_NOT_READY)
            BS->WaitForEvent(1, &ST->ConIn->WaitForKey, &index);
+ P( d1 o8 w9 m. O        else
- l( O) ?8 y- v1 [. i+ }            break;
    }
    if (!EFI_ERROR(Status)) {
7 k0 h$ B, o. c/ ?* o, N' d        if (key.ScanCode == SCAN_ESC)
            RT->ResetSystem(EfiResetCold, EFI_SUCCESS, 0, NULL);
    }
3 [9 S+ U) c9 l8 X4 h1 `   
# }( U) V# e% h# k    return Status;
}
0 A# K9 F5 d& J
9 \2 U7 E9 T' O& REFI_STATUS
$ a$ x/ U/ O4 }4 R1 j- H  [& Q5 \EFIAPI
* v8 z. F' _) H- g. b$ oMyfileioMain (IN EFI_HANDLE           ImageHandle,
             IN EFI_SYSTEM_TABLE     *SystemTable)
{
7 w  g2 N* e: n" {+ S+ R    EFI_STATUS                Status;
1 {! l4 y+ b  l( X' Q9 S6 ~2 V    EFI_HANDLE                *DestAddr;       
  |( f( }0 a6 R: d5 q& P    EFI_LOADED_IMAGE        *FileHandle01;
    EFI_DEVICE_PATH        *FileHandle02;       
" R& L4 O' D5 w2 m    EFI_FILE_IO_INTERFACE        *FileHandle03;
    EFI_FILE                *FileHandle04;
    EFI_FILE                *FileHandle05;
    CHAR16                *FileName;
        CHAR16      *BufferA, *BufferB, *BufferC, *Space_Key;
2 w+ j) \5 @# a: C5 q, i. y    UINTN                BufferSize = 8, BufferSizeKeySpace = 2;
7 |% B, h. v  w5 u- A    int         Bit0, Bit1, Key_Space;       
1 S- V3 ]2 F4 K0 U, M
% L, s6 P8 f  n" |, w3 r    FileName = L"NewFile.txt";
0 c8 S+ O& I! b' ^        Space_Key = L" ";
       
* s: J$ R  N3 a9 L% }3 ?5 b        BufferA = L"ABCD";
        BufferB = L"EFGH";
        BufferC = L"IJKL";
! }! \2 p" J0 U* ~5 e
! B; ]7 F7 A8 s) K9 [, l        Bit0 = 0xff;
        Bit1 = 0xfe;
       
        Key_Space = 0x0020;
# M8 p: y1 V- V7 h8 T( B: A       
    InitializeLib (ImageHandle, SystemTable);       

4 k* l  c/ m+ z5 o5 l) Y    DestAddr = AllocatePool (BufferSize);       
+ [0 C- ^. G( O  {: X& H
- `6 i, r" s% s, _0 B+ O' b    Print (L"Value of Bit0 is %x\n", Bit0);
; X% v) K8 i6 ]    Print (L"Value of Bit1 is %x\n", Bit1);       

       
    Status = BS->HandleProtocol(ImageHandle, &LoadedImageProtocol, (VOID*)&FileHandle01);
    if (EFI_ERROR(Status)) {
0 ]% o7 {# M2 C6 U& [* w' L2 q        Print (L"Could not obtain Image, FileHandle01 err code is %x\n",Status);
        return EFI_LOAD_ERROR;
; K8 r* g8 j0 A' a6 B6 \    }

    Status = BS->HandleProtocol(FileHandle01->DeviceHandle,&DevicePathProtocol,(VOID*)&FileHandle02);
( Z* y4 [$ }; R* W( u  X+ ^    if (EFI_ERROR(Status)) {
            Print (L"Could not obtain Device Path, FileHandle02 err code is %x\n",Status);
            return EFI_LOAD_ERROR;
        }       
3 g) i$ F/ J6 R( M& @       
, r9 u/ Z  |; @# c. n5 q    Status = BS->HandleProtocol (FileHandle01->DeviceHandle,&FileSystemProtocol,(VOID*)&FileHandle03);
    if (EFI_ERROR(Status)) {
1 a1 g: D5 g: G3 w            Print (L"Could not obtain File System, FileHandle03 err code is %x\n",Status);
2 ?! `3 l: u/ W' f- X            return EFI_LOAD_ERROR;
7 ^; }& u7 p! q1 m: L* Y* |        }
2 U. g0 b5 Z% @1 T  w; o, C& J
$ t: X  A' {2 L5 f    Status = FileHandle03->OpenVolume(FileHandle03, &FileHandle04);
0 ?0 @7 F: u8 d- L    if (EFI_ERROR(Status)) {
0 D8 @, l+ k1 H7 g1 o, s& [        Print (L"Could not open volume, FileHandle04 err code is %x\n",Status);
        return EFI_LOAD_ERROR;
    }               
. H% W$ N8 w5 R               
    Status = FileHandle04->Open(FileHandle04, &FileHandle05, FileName, FILE_ATTRIB_CREATENEW, 0x20);
    if (EFI_ERROR(Status)) {
        Print (L"Could not open file, FileHandle05 err code is %x\n",Status);
        return EFI_LOAD_ERROR;
    }
" H  y8 b# p+ u1 c' G       
( V& n2 x' W* Y' t" m! Y    Status = FileHandle05->SetPosition(FileHandle05, 0);       
8 o7 e) [6 f; j- P7 G3 q# N    if (EFI_ERROR(Status)) {
: J4 _; B# K4 ]) ^% v        Print (L"Could not do SetPositioon to the file, FileHandle05 err code is %x\n",Status);
; z  a3 |( J& h; h& w        return EFI_SUCCESS;
    }
       
    Status = FileHandle05->Write(FileHandle05, &BufferSize, &Bit0);
" \2 ~, M) U$ e. P/ ~        Print (L"File Buffersize is %x\n\n", BufferSize);
& C5 o5 C" G3 N+ b; f    if (EFI_ERROR(Status)) {
        Print (L"Could not write file, FileHandle05 err code is %x\n\n",Status);
        return EFI_SUCCESS;
0 D9 ]9 O& f6 n' J! R2 m    }       
2 a% C; t4 S  S) ?
    Status = FileHandle05->SetPosition(FileHandle05, 1);       
    if (EFI_ERROR(Status)) {
3 y' ~) e) R6 Y3 o        Print (L"Could not do SetPositioon to the file, FileHandle05 err code is %x\n",Status);
& G$ u* c7 K1 t9 G" H7 }        return EFI_SUCCESS;
# Q! H) P! K# K6 h7 `3 F" x' D    }
9 ?5 x- Q- d8 k       
    Status = FileHandle05->Write(FileHandle05, &BufferSize, &Bit1);
        Print (L"File Buffersize is %x\n\n", BufferSize);
    if (EFI_ERROR(Status)) {
9 _4 l1 R7 c6 s9 ?9 Z        Print (L"Could not write file, FileHandle05 err code is %x\n\n",Status);
* ^1 S$ c3 o6 q$ @$ I        return EFI_SUCCESS;
    }               
3 b8 e7 L  X$ \, ~% _& q8 \+ k       
2 P- Z3 I( O9 f0 @8 E0 \4 s- A    Status = FileHandle05->SetPosition(FileHandle05, 2);       
    if (EFI_ERROR(Status)) {
- W0 c8 a2 S/ w* x        Print (L"Could not do SetPositioon to the file, FileHandle05 err code is %x\n",Status);
        return EFI_SUCCESS;
    }
       
+ l- L/ B' K3 u$ Q4 e    Status = FileHandle05->Write(FileHandle05, &BufferSize, BufferA);
        Print (L"File Buffersize is %x\n\n", BufferSize);
    if (EFI_ERROR(Status)) {
        Print (L"Could not write file, FileHandle05 err code is %x\n\n",Status);
# i. k) K6 `4 Q) U& j; n' P( P        return EFI_SUCCESS;
/ E. S2 y5 @, i# V* P$ C/ @: u    }       

6 w8 I" }8 G6 H# X- l, R//--------------------------------------------------------------------------------------------------------------------------------------------------------------->>>
    Print (L"Before Read FileHandle05 file Data of BufferB is %s\n\n",BufferB);
    Status = FileHandle05->SetPosition(FileHandle05, 2);       
    if (EFI_ERROR(Status)) {
4 h# N2 M7 k9 l4 k7 \        Print (L"Could not do SetPositioon to the file, FileHandle05 err code is %x\n",Status);
        return EFI_SUCCESS;
    }
8 D0 Z  |; m; P* f4 C
    Status = FileHandle05->Read(FileHandle05, &BufferSize, BufferB);
    if (EFI_ERROR(Status)) {
/ Q9 y4 J3 i) a3 L" {( V6 D        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);
//---------------------------------------------------------------------------------------------------------------------------------------------------------------<<<
8 v! w" P5 O/ @" H
$ y7 G! f- X4 ~# J7 n    Status = FileHandle05->SetPosition(FileHandle05, 10);       
* @$ t, h; Z& `' x9 l* i    if (EFI_ERROR(Status)) {
        Print (L"Could not do SetPositioon to the file, FileHandle05 err code is %x\n",Status);
        return EFI_SUCCESS;
    }
& E  b! @' W6 i) x; G( A8 G: H% J       
    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;
    }

4 X4 c+ S  F  R; h' Z+ E2 ]    Status = FileHandle05->SetPosition(FileHandle05, 12);       
    if (EFI_ERROR(Status)) {
        Print (L"Could not do SetPositioon to the file, FileHandle05 err code is %x\n",Status);
        return EFI_SUCCESS;
    }
       
    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;
    }
2 `1 b# O1 b1 j. b4 k$ d6 v" X& E0 o
    Status = FileHandle05->SetPosition(FileHandle05, 14);       
    if (EFI_ERROR(Status)) {
        Print (L"Could not do SetPositioon to the file, FileHandle05 err code is %x\n",Status);
        return EFI_SUCCESS;
3 u: t! F; `$ N. M9 C8 e- m  @    }
( r7 A( B3 K1 b% _       
  T# B  V* f! s    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;
    }

' Q/ j3 K7 U* ]$ i! X4 R, A    Status = FileHandle05->SetPosition(FileHandle05, 16);       
    if (EFI_ERROR(Status)) {
" |; Q+ a6 H1 ?' Q  [/ q: \! M        Print (L"Could not do SetPositioon to the file, FileHandle05 err code is %x\n",Status);
0 L; z7 T) O- P8 ?; ^2 H        return EFI_SUCCESS;
+ l0 }" W7 g% M) {. K! g* f    }
) W5 l" W, m& Q3 _       
    Status = FileHandle05->Write(FileHandle05, &BufferSizeKeySpace, Space_Key);
    if (EFI_ERROR(Status)) {
        Print (L"Could not write file, FileHandle05 err code is %x\n",Status);
' n/ i) u3 W3 U* ]( E5 `' A        return EFI_SUCCESS;
/ ]$ \5 ]7 s0 X( g% Z1 Q3 c. R! r4 D    }       

0 S  O5 n$ ~4 L$ U  V4 b, |//---------------------------------------------------------------------------------------------------------------------------------------------------------------

    Status = FileHandle05->SetPosition(FileHandle05, 18);       
7 o' F& Q, |! f! ]    if (EFI_ERROR(Status)) {
        Print (L"Could not do SetPositioon to the file, FileHandle05 err code is %x\n",Status);
        return EFI_SUCCESS;
7 }+ v0 v3 J1 n+ U/ f  `    }
       
5 O+ o' e6 [0 `+ j    Status = FileHandle05->Write(FileHandle05, &BufferSize, BufferC);
% W- d. K6 C, l5 d    if (EFI_ERROR(Status)) {
) d6 b3 T  c. ~  G9 ~        Print (L"Could not write file, FileHandle05 err code is %x\n",Status);
! x  m* r: m, \' S' d1 e2 r        return EFI_SUCCESS;
/ U" p$ B: Y9 s% n  N# y    }       
       
    FreePool(DestAddr);       

- \: L$ b3 n* [    Status = FileHandle05->Close(FileHandle05);
7 x3 x; @% m! }# {0 ~) c8 ^9 m/ k0 K    if (EFI_ERROR(Status)) {
" S% }/ O. a7 @6 G/ I0 O! ~        Print (L"Could not close file, FileHandle05 err code is %x\n",Status);
        return EFI_SUCCESS;
    }
9 Q# D! L; l- m: [       
    Print(L"File Name = %s has already been created.\n", FileName);

    Print(L"\nPress ESC to reboot or any other key to return control to the firmware.\n\n");
& M. R! s( V4 C9 C    WaitForKeyOrReset();

  U, R# E! `2 q) R6 ~    return Status;
}

chenhy

//**********************************************************************
5 q- P( k1 ~1 ^- \( D6 D//**********************************************************************
) f" [0 ]1 {% M3 J: v+ A" Y//** Demo code for PCI configuration space I/O access program **
//** By Lawrence 2009/11/20 @Taiwan**                          
//**********************************************************************
//**********************************************************************

#include "efi.h"
#include "efilib.h"
  E1 q4 U* o2 L! ]$ O) ~+ y
#define        Not_Found_Me        0x00000000
#define        Found_Me        0x00000001
! u, J- T1 X/ Y2 O2 p/ h
9 K8 \1 C7 p+ O' Q- F- sstatic EFI_STATUS WaitForKeyOrReset(VOID)
{
    EFI_STATUS          Status;
    EFI_INPUT_KEY       key;
    UINTN               index;
# h, r, V5 Z' l( S# k# g& [   
7 U. q6 y7 J2 g; f  r; c1 x9 _& O. z    for(;;) {
# h+ V- ~( O' e9 I* P        Status = ST->ConIn->ReadKeyStroke(ST->ConIn, &key);
# l: R% i4 R  v/ ?        if (Status == EFI_NOT_READY)
1 d3 \* w1 b( L% ~9 a            BS->WaitForEvent(1, &ST->ConIn->WaitForKey, &index);
        else
; ?5 _, o/ ^. Q) n            break;
+ F1 s: ^+ n! L    }
& ~7 f, a2 ^# c' q& G, K& I    if (!EFI_ERROR(Status)) {
& C3 F1 D3 n, H, u        if (key.ScanCode == SCAN_ESC)
; {3 o5 {, x8 M, h9 m, G7 n            RT->ResetSystem(EfiResetCold, EFI_SUCCESS, 0, NULL);
2 q- l( _+ t% v6 o2 S. F    }
  l/ e& m  ?1 z, l, O" E: ^4 e1 T   
    return Status;
}
# x# p+ O$ o2 [' S4 w; T
UINTN
AccessPciConfig (
    IN  EFI_PCI_IO_PROTOCOL              *PCI_DEVICE_TARGET
( D/ c& k+ i6 ]5 z8 k    )
{
; n$ O( E! _7 o" i        UINT8  i;
6 D' a* d9 m  m/ `6 u/ D8 N( e        UINTN  PCI_ATTR[4];
        UINT8  PCI_REG[4], pci_offset=0;

        //get device attr
  ~# u# k& ~' ^& P2 |        PCI_DEVICE_TARGET->GetLocation(PCI_DEVICE_TARGET,PCI_ATTR,PCI_ATTR+1,PCI_ATTR+2,PCI_ATTR+3);       
$ D  a6 h% {3 A( T: @    if ((PCI_ATTR[1] == 0x00) && (PCI_ATTR[2] == 0x1e) && (PCI_ATTR[3] == 0x00)){
          Print (L"Device found at BUS = %02x         DEV= %02x        FUN= %02x  \n",PCI_ATTR[1],PCI_ATTR[2],PCI_ATTR[3]);
5 R+ T3 s: h+ }8 ~; o+ S# x          ST->ConOut->SetAttribute (ST->ConOut, EFI_TEXT_ATTR (EFI_GREEN, EFI_BLACK));       
1 O7 j1 {9 Q  _' W% z          //print register value
          for (i = 0;i < 4;i++)
: v- D% b* ~% B* o3 ]! \          {
        PCI_DEVICE_TARGET->Pci.Read (PCI_DEVICE_TARGET,0,pci_offset,4,PCI_REG);
                Print(L"Register0x%d value = %02x \n",i, PCI_REG);
          }
! K2 \& j2 X* y          Print(L"\n");          
: a% d  W# f0 x( }3 I          ST->ConOut->SetAttribute (ST->ConOut, EFI_TEXT_ATTR (EFI_WHITE, EFI_BLACK));                  
7 c3 Q& \% p) |+ G' u# [8 z          return Found_Me;
    }
2 K: t  _: L3 {, h# e
        return Not_Found_Me;
/ @- Y1 G0 C. ]5 N}
9 k# G% m- C1 r5 q' ~
EFI_STATUS
; u$ L6 ]  z- Z5 h- j( kInitializePciApplication (
    IN EFI_HANDLE           ImageHandle,
    IN EFI_SYSTEM_TABLE     *SystemTable
; ]0 V, Q, f& F    )
  h/ f( C5 d: A: y9 T5 g# l/ }{
  v( f. K+ k: n# m" c: }  EFI_STATUS              Status;
  EFI_HANDLE              *Handle;
! C+ L+ `( k/ Z8 ^: `9 B4 Z  UINTN                   BufferSize, Result;
  UINTN                   NoHandles, Index;
  EFI_PCI_IO_PROTOCOL          *PCI_DEVICE_TARGET;
8 P0 h. p/ K2 C; W! A
' \. |& D4 ^  b- {) A! L9 a, `    //
    // Initialize the Library.
1 g# J, W; g1 H. O0 ?" S7 o    //
$ W+ @8 S0 J" U) Y    InitializeLib (ImageHandle, SystemTable);
    //
    // Find the PCI driver
    //
    Handle = NULL;
0 f. _, Q. i: \. R; I% @. @1 y    BufferSize = 1;
* f9 p" l/ F7 T8 R    do
0 t3 B3 l8 ]  U$ {: s    {
      if (Handle)
* p( y* Z! W2 a( Q* b- ?6 Y' p      {
        FreePool (Handle);
      }
/ Y; X# W! G2 z: h8 {- @6 y" e               
      Handle = AllocatePool (BufferSize);
  X$ R, g+ ]+ ?5 E# B( T( w+ Z) U      Status = BS->LocateHandle (ByProtocol, &PciIoProtocol, NULL, &BufferSize, Handle);

    } while (Status == EFI_BUFFER_TOO_SMALL);
& R2 ]& o7 E& E2 I& |. F    ASSERT (!EFI_ERROR(Status));
* @8 h8 |7 _' t- D- ?. j% l
$ K+ ^8 i( U8 G$ q# M" y    NoHandles  = BufferSize / sizeof(EFI_HANDLE);
+ R6 n$ |/ i( p' [5 B3 A0 K0 r9 Z    Index = 0;
    ST->ConOut->ClearScreen (ST->ConOut);
    Result = Not_Found_Me;       
    do
7 _! O! ?' d) N/ @    {       
$ ~2 k- e8 h4 F# w0 b1 f        if(Index == NoHandles - 1)
, G" V  I( p5 W2 C$ ~/ o         Index=0;
. Q- S. w9 K) [          else
1 K) ]* Z6 C9 B5 q5 n* j    Status = BS->HandleProtocol (Handle[Index], &PciIoProtocol, (VOID*)&PCI_DEVICE_TARGET);
( u6 N0 \4 n1 [4 r0 w2 {        Print(L"THIS IS DEVICE %d \n",Index);
    if (!EFI_ERROR(Status))
    {
$ \% j; H; p9 a# h& c) c5 ?( R6 D          Result = AccessPciConfig(PCI_DEVICE_TARGET);
- X; e4 ~" m; C- @2 o//-          Print(L"Again now Result is %x \n",Result);          
$ B4 w. Y; {0 s4 [    }
+ J! i. z1 e6 T    Index++;               
! Q! q0 E; q9 M  A! C; O    } while(Result == Not_Found_Me);
% C* Y1 ]8 B+ e% [8 L' Y# e       
" I! w3 i+ F  d# i* _( X% d' W        Print(L"Please hit any key to exit this image.");       
    WaitForSingleEvent (ST->ConIn->WaitForKey, 0);
               
    return EFI_SUCCESS;
}

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