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

kaurohy

/*
* myfileio.c
3 _$ d3 {# i3 W * Apps
*/

#include "efi.h"
#include "efilib.h"
1 b9 I. X  I2 X1 b5 k. W
#define FILE_ATTRIB_CREATENEW         EFI_FILE_MODE_READ  | EFI_FILE_MODE_WRITE | EFI_FILE_MODE_CREATE

7 s6 y6 G# V6 X/ ^+ Fstatic EFI_STATUS WaitForKeyOrReset(VOID)
{
" }' \+ l* L, d, e4 p( e. N    EFI_STATUS          Status;
    EFI_INPUT_KEY       key;
    UINTN               index;
# A4 C# j1 p! V4 G4 U) K0 G   
7 u" w* f  T, ^% k  H    for(;;) {
$ B+ K" N/ I, K, y  u7 S        Status = ST->ConIn->ReadKeyStroke(ST->ConIn, &key);
" V: J  D9 k& K1 n1 ~        if (Status == EFI_NOT_READY)
            BS->WaitForEvent(1, &ST->ConIn->WaitForKey, &index);
( F, M% z6 z  {' P% e        else
" P* Y: w$ C* m            break;
: G+ c$ z! E, M9 {. S! ?    }
$ p, C  k  P- k) G! O6 z    if (!EFI_ERROR(Status)) {
& C) X3 S; k; b% }& ?        if (key.ScanCode == SCAN_ESC)
' q2 T% V3 e4 }" F) `            RT->ResetSystem(EfiResetCold, EFI_SUCCESS, 0, NULL);
; m* y; v5 t9 t$ z( v    }
   
    return Status;
}
/ S. ]7 a9 h. t+ R
EFI_STATUS
EFIAPI
5 ]' |0 a" E8 x! E1 iMyfileioMain (IN EFI_HANDLE           ImageHandle,
7 a% Y3 f6 q  X: O# S             IN EFI_SYSTEM_TABLE     *SystemTable)
' ^( F% `$ {8 f$ G, F. N' Q- y# K{
    EFI_STATUS                Status;
7 l- A+ `8 ]+ Q3 ~0 G' v+ o% q    EFI_HANDLE                *DestAddr;       
    EFI_LOADED_IMAGE        *FileHandle01;
    EFI_DEVICE_PATH        *FileHandle02;       
8 _' Z- S( o1 f' H% y    EFI_FILE_IO_INTERFACE        *FileHandle03;
* W7 S* Q; @9 J4 a$ |$ u) K. I    EFI_FILE                *FileHandle04;
/ Y' v5 l2 ^1 Q; m* I    EFI_FILE                *FileHandle05;
    CHAR16                *FileName;
# D" y# g; L+ C4 o) W5 H! x        CHAR16      *BufferA, *BufferB, *BufferC, *Space_Key;
    UINTN                BufferSize = 8, BufferSizeKeySpace = 2;
    int         Bit0, Bit1, Key_Space;       
0 b1 w  x9 h9 n( K/ A+ `
    FileName = L"NewFile.txt";
8 X& v) v3 ^" W* p        Space_Key = L" ";
5 ^$ `; I# o% Z9 m( H       
$ E( r/ b( G1 c6 B2 \9 H        BufferA = L"ABCD";
        BufferB = L"EFGH";
        BufferC = L"IJKL";
1 \" |& n0 g" c1 i* a# @
        Bit0 = 0xff;
        Bit1 = 0xfe;
% W+ n3 C( {2 f& j: b0 G( n       
        Key_Space = 0x0020;
: t5 B/ f5 U& L0 o7 V# u; @       
    InitializeLib (ImageHandle, SystemTable);       

  }" a1 q$ [) A    DestAddr = AllocatePool (BufferSize);       

    Print (L"Value of Bit0 is %x\n", Bit0);
4 J& ^3 g8 A4 Q7 \' c    Print (L"Value of Bit1 is %x\n", Bit1);       

) C9 [2 u* P1 A3 ?8 Q; J       
    Status = BS->HandleProtocol(ImageHandle, &LoadedImageProtocol, (VOID*)&FileHandle01);
% v/ i) G% n8 @5 b! x9 l( N    if (EFI_ERROR(Status)) {
' ]* T/ T& r8 g: x$ J, C        Print (L"Could not obtain Image, FileHandle01 err code is %x\n",Status);
2 |9 ^$ G: h8 L        return EFI_LOAD_ERROR;
    }

    Status = BS->HandleProtocol(FileHandle01->DeviceHandle,&DevicePathProtocol,(VOID*)&FileHandle02);
! K6 C2 ~, z/ ^, N5 q0 v1 d    if (EFI_ERROR(Status)) {
  O! u) Y$ t' `# I% I            Print (L"Could not obtain Device Path, FileHandle02 err code is %x\n",Status);
            return EFI_LOAD_ERROR;
; V+ f; V7 s% |. j) f        }       
/ V7 _' G1 r9 C- t' x: i5 J- T: f       
& k% a) P) P, q2 i, C    Status = BS->HandleProtocol (FileHandle01->DeviceHandle,&FileSystemProtocol,(VOID*)&FileHandle03);
" Q- _+ k2 I  [8 B3 R  R3 V0 ]    if (EFI_ERROR(Status)) {
1 Z; O7 k1 _& p: n            Print (L"Could not obtain File System, FileHandle03 err code is %x\n",Status);
3 z* S& e6 R' y& g3 @4 w% t2 U  U            return EFI_LOAD_ERROR;
- ?3 k, k5 {. }$ i6 W        }

+ R; H4 k/ u9 L" p5 {) C, W4 g* ~    Status = FileHandle03->OpenVolume(FileHandle03, &FileHandle04);
    if (EFI_ERROR(Status)) {
( z" Y8 Z  T  R, Z( }3 Q        Print (L"Could not open volume, FileHandle04 err code is %x\n",Status);
        return EFI_LOAD_ERROR;
    }               
               
    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;
    }
3 R9 ~% N, i1 N8 q       
' X. C/ n+ c, E    Status = FileHandle05->SetPosition(FileHandle05, 0);       
    if (EFI_ERROR(Status)) {
) g; j3 M5 [1 X% C1 ^        Print (L"Could not do SetPositioon to the file, FileHandle05 err code is %x\n",Status);
        return EFI_SUCCESS;
% |: H/ S, ]' O0 r8 ?    }
       
" [8 }/ a2 t4 K* ]: z' b9 s, M' C5 z    Status = FileHandle05->Write(FileHandle05, &BufferSize, &Bit0);
        Print (L"File Buffersize is %x\n\n", BufferSize);
9 Q  n! g3 ~# X* ]$ w9 R! W' w. T% G    if (EFI_ERROR(Status)) {
, A4 p! K) X: r) ^        Print (L"Could not write file, FileHandle05 err code is %x\n\n",Status);
        return EFI_SUCCESS;
    }       

    Status = FileHandle05->SetPosition(FileHandle05, 1);       
* i! v. {% w7 W8 g    if (EFI_ERROR(Status)) {
$ j" \; K! m! j! L" L        Print (L"Could not do SetPositioon to the file, FileHandle05 err code is %x\n",Status);
        return EFI_SUCCESS;
    }
) y& Q# m2 ?- j4 y# z       
* }( A0 t0 @0 i) u& H6 B    Status = FileHandle05->Write(FileHandle05, &BufferSize, &Bit1);
        Print (L"File Buffersize is %x\n\n", BufferSize);
4 V; H8 Y4 s8 D: L; B    if (EFI_ERROR(Status)) {
( q8 r$ @* k2 a: R4 e2 J+ U        Print (L"Could not write file, FileHandle05 err code is %x\n\n",Status);
; [: i+ ~8 S- \7 @& `9 J) ]! Q        return EFI_SUCCESS;
    }               
       
    Status = FileHandle05->SetPosition(FileHandle05, 2);       
    if (EFI_ERROR(Status)) {
        Print (L"Could not do SetPositioon to the file, FileHandle05 err code is %x\n",Status);
1 J! {. o' ?" B$ F1 b& S        return EFI_SUCCESS;
) e3 h. h) t3 `# t( v7 o    }
5 G& S  Z: y* t; y& R       
    Status = FileHandle05->Write(FileHandle05, &BufferSize, BufferA);
        Print (L"File Buffersize is %x\n\n", BufferSize);
: l( ?. K9 d( [( o  q. I    if (EFI_ERROR(Status)) {
' |- b+ r2 \% w) h+ O" X        Print (L"Could not write file, FileHandle05 err code is %x\n\n",Status);
        return EFI_SUCCESS;
* e& T) b, Y* J) K9 v" {    }       
) X& n1 A# }) t( L& W6 f) T
, {2 G2 T5 l# V# m3 p) |//--------------------------------------------------------------------------------------------------------------------------------------------------------------->>>
$ a1 A' V1 w6 R    Print (L"Before Read FileHandle05 file Data of BufferB is %s\n\n",BufferB);
    Status = FileHandle05->SetPosition(FileHandle05, 2);       
    if (EFI_ERROR(Status)) {
        Print (L"Could not do SetPositioon to the file, FileHandle05 err code is %x\n",Status);
/ ?' o3 t5 G- j0 f        return EFI_SUCCESS;
    }

' F( k$ P! Q; G# i: y1 ?# z    Status = FileHandle05->Read(FileHandle05, &BufferSize, BufferB);
    if (EFI_ERROR(Status)) {
# Q  t* s2 Y4 F9 z- Q! L, j) u        Print (L"Could not read file, FileHandle05 err code is %x\n",Status);
        return EFI_SUCCESS;
    }       
1 t* A0 k2 `  ^; P) [        Print(L"1. After Read FileHandle05 file of Data of BufferSize is %d and Data of BufferB is %s\n\n", BufferSize, BufferB);
/ M, E; f1 ]# M' l//---------------------------------------------------------------------------------------------------------------------------------------------------------------<<<

/ Q( a- {3 k9 @& t0 V: n  @    Status = FileHandle05->SetPosition(FileHandle05, 10);       
    if (EFI_ERROR(Status)) {
- C" U" o4 E( p4 D( J        Print (L"Could not do SetPositioon to the file, FileHandle05 err code is %x\n",Status);
        return EFI_SUCCESS;
    }
7 K/ Z# }0 h7 y/ h, [# j6 j% v       
    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;
    }
1 _/ N9 \  `$ b! n5 l, i
    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);
9 I, g% F6 H* m; L/ r        return EFI_SUCCESS;
    }
       
. v) x7 n: m; r" ~* X# R    Status = FileHandle05->Write(FileHandle05, &BufferSizeKeySpace, Space_Key);
% x' r& v. S, S* b# N    if (EFI_ERROR(Status)) {
        Print (L"Could not write file, FileHandle05 err code is %x\n",Status);
* o0 a) `7 I! n# x        return EFI_SUCCESS;
    }
/ s8 s4 {9 w2 [- q" t- ]" g
: ^0 `$ Z' q. j, u0 @, X    Status = FileHandle05->SetPosition(FileHandle05, 14);       
5 g1 v6 E5 ]7 y3 H/ g! w    if (EFI_ERROR(Status)) {
' r! l8 n4 B& Z6 G        Print (L"Could not do SetPositioon to the file, FileHandle05 err code is %x\n",Status);
! p4 t" W' k  H# Y6 ^- t        return EFI_SUCCESS;
( x2 D) q, v+ O/ x    }
1 l; o7 \: [: q* F0 ?: W7 V       
    Status = FileHandle05->Write(FileHandle05, &BufferSizeKeySpace, Space_Key);
  `  S2 `$ T8 E4 q5 u7 k' S    if (EFI_ERROR(Status)) {
) H! p; G: X- Z, h4 p; F        Print (L"Could not write file, FileHandle05 err code is %x\n",Status);
        return EFI_SUCCESS;
4 @/ s9 Q8 y% e" E/ [    }

    Status = FileHandle05->SetPosition(FileHandle05, 16);       
$ L' Y5 H; ~2 Z2 G    if (EFI_ERROR(Status)) {
* \' A) o4 k+ [$ q% S        Print (L"Could not do SetPositioon to the file, FileHandle05 err code is %x\n",Status);
        return EFI_SUCCESS;
    }
       
  j8 e5 b' j8 [3 t    Status = FileHandle05->Write(FileHandle05, &BufferSizeKeySpace, Space_Key);
3 f4 L2 M9 A0 }9 u( ~" M4 n    if (EFI_ERROR(Status)) {
        Print (L"Could not write file, FileHandle05 err code is %x\n",Status);
        return EFI_SUCCESS;
' E8 l: y. \4 t! O1 f% E$ ~    }       
- s. ]7 J4 t- R( U- ~( `, g2 Z
! r: g9 z2 h- t4 E//---------------------------------------------------------------------------------------------------------------------------------------------------------------

, [+ d( N2 h( j; |- }& P  \( ^    Status = FileHandle05->SetPosition(FileHandle05, 18);       
    if (EFI_ERROR(Status)) {
        Print (L"Could not do SetPositioon to the file, FileHandle05 err code is %x\n",Status);
        return EFI_SUCCESS;
9 R8 P" d. D4 `: x    }
* s3 A; Z4 k5 R4 `) p0 ~( k       
$ E! Q, p  Q% S" S: I8 p    Status = FileHandle05->Write(FileHandle05, &BufferSize, BufferC);
9 ]% j4 A0 y/ B3 B    if (EFI_ERROR(Status)) {
        Print (L"Could not write file, FileHandle05 err code is %x\n",Status);
        return EFI_SUCCESS;
    }       
       
- q# B" R* |# e7 V    FreePool(DestAddr);       

# n3 `/ K/ h  t1 @    Status = FileHandle05->Close(FileHandle05);
    if (EFI_ERROR(Status)) {
        Print (L"Could not close file, FileHandle05 err code is %x\n",Status);
        return EFI_SUCCESS;
    }
& ~! J' J. f" C, q; U       
/ ^2 n3 Z$ n, x' _0 m5 l    Print(L"File Name = %s has already been created.\n", FileName);
9 d* f! F% r) h" N& |7 j0 h
    Print(L"\nPress ESC to reboot or any other key to return control to the firmware.\n\n");
    WaitForKeyOrReset();
3 n+ P) I. \; Q# G3 ^6 t
  o# f5 n7 D2 x( i    return Status;
! f# V! A6 f6 ~* i- [}

chenhy

//**********************************************************************
, \3 B4 M, J( K$ d% \! g) f+ f//**********************************************************************
//** Demo code for PCI configuration space I/O access program **
//** By Lawrence 2009/11/20 @Taiwan**                          
//**********************************************************************
  N" g  h" v0 e; I  _: m/ l//**********************************************************************

+ n# `3 y* q5 P" t#include "efi.h"
) e) `1 H3 J8 n; B3 u! B#include "efilib.h"

#define        Not_Found_Me        0x00000000
9 K/ S$ J8 R8 O2 X5 C#define        Found_Me        0x00000001
& E/ U2 M' U6 [. ?1 c! I) H+ E
2 l7 T2 V$ }) {static EFI_STATUS WaitForKeyOrReset(VOID)
{
    EFI_STATUS          Status;
. G4 M" q. @6 K" _* N, y) T    EFI_INPUT_KEY       key;
    UINTN               index;
8 F3 ~3 Z3 e$ Q* `# n   
" G( |! l6 H7 Y& m! b    for(;;) {
        Status = ST->ConIn->ReadKeyStroke(ST->ConIn, &key);
4 V% ]* t. G& n' {9 c  P        if (Status == EFI_NOT_READY)
* g" _' B6 v4 J/ S6 h7 M            BS->WaitForEvent(1, &ST->ConIn->WaitForKey, &index);
* k% ~* Z" c4 Q1 W4 G, M        else
1 L$ X3 @& {- B            break;
) b( A: `' p0 U& M2 C' h& [. L) H    }
0 u  {7 q( J6 S    if (!EFI_ERROR(Status)) {
+ {8 W* m3 }- P2 e5 z% x2 M3 Q0 j        if (key.ScanCode == SCAN_ESC)
" G3 L# O( @0 v" ], r' v+ @' M            RT->ResetSystem(EfiResetCold, EFI_SUCCESS, 0, NULL);
    }
   
+ C' i' C& j: q# r    return Status;
  A7 W- w* q8 Z4 E1 y+ E1 Q, a}

UINTN
/ p1 _. r+ w( }' F* EAccessPciConfig (
: a/ S- ]$ @+ T9 o+ J    IN  EFI_PCI_IO_PROTOCOL              *PCI_DEVICE_TARGET
6 `* d9 L0 q3 S9 y) }    )
1 F; S1 @3 R' s  @{
5 y/ b  l, m% s9 m% B9 p        UINT8  i;
& M+ q) a0 W# G9 c8 p, m0 ~  L+ d        UINTN  PCI_ATTR[4];
        UINT8  PCI_REG[4], pci_offset=0;
# b& K9 y( I- |" ^: N
        //get device attr
        PCI_DEVICE_TARGET->GetLocation(PCI_DEVICE_TARGET,PCI_ATTR,PCI_ATTR+1,PCI_ATTR+2,PCI_ATTR+3);       
    if ((PCI_ATTR[1] == 0x00) && (PCI_ATTR[2] == 0x1e) && (PCI_ATTR[3] == 0x00)){
* i* r% B$ _7 S! j/ ?/ a          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));       
/ F) N8 [* @8 J. e          //print register value
          for (i = 0;i < 4;i++)
          {
# m0 a8 A/ `$ Z) k/ r        PCI_DEVICE_TARGET->Pci.Read (PCI_DEVICE_TARGET,0,pci_offset,4,PCI_REG);
                Print(L"Register0x%d value = %02x \n",i, PCI_REG);
          }
          Print(L"\n");          
$ i' Z- B) a0 T* P          ST->ConOut->SetAttribute (ST->ConOut, EFI_TEXT_ATTR (EFI_WHITE, EFI_BLACK));                  
          return Found_Me;
/ X  e) q0 w3 d! |    }
, K$ n8 Q4 s; f7 h4 q
- T; w) P, U; \  G) B) j        return Not_Found_Me;
}
9 s- A! @: G0 p3 k+ y2 N
5 U* ~% ^2 o" Q& |" T% AEFI_STATUS
8 v3 [( a2 c* ^( F& eInitializePciApplication (
3 D* y9 d  |: y1 p6 e3 o. _2 m8 M    IN EFI_HANDLE           ImageHandle,
* K' n' |6 u0 q  j/ Q; z3 b, M    IN EFI_SYSTEM_TABLE     *SystemTable
9 P1 ^* k7 M: R    )
{
  EFI_STATUS              Status;
4 ]4 G# `4 W! h( D( i! Z+ e1 i  EFI_HANDLE              *Handle;
  UINTN                   BufferSize, Result;
1 m: }* v3 P% ?  {$ g) \" q  UINTN                   NoHandles, Index;
& g2 h: }* N+ |$ d" {  EFI_PCI_IO_PROTOCOL          *PCI_DEVICE_TARGET;
2 q- S0 @1 C, C$ u8 ]4 F
    //
    // Initialize the Library.
    //
+ q8 T+ c' ]6 O" X5 u3 Y$ b' b    InitializeLib (ImageHandle, SystemTable);
    //
2 a; u' c% G9 O8 N9 \, d0 m( j    // Find the PCI driver
    //
4 q9 p& v5 I) [5 X' Y' Z    Handle = NULL;
7 w/ K0 s8 b5 g" S* x' Z- L    BufferSize = 1;
& H+ ^" A9 T- q  G, \2 b    do
5 w1 {- E' k& g    {
      if (Handle)
2 ^/ S+ l2 s6 |, H3 G* O3 f      {
        FreePool (Handle);
      }
3 D/ v" U9 H* Z$ M               
" k0 o! }6 s8 _8 ~/ j, `      Handle = AllocatePool (BufferSize);
      Status = BS->LocateHandle (ByProtocol, &PciIoProtocol, NULL, &BufferSize, Handle);
( P- I, o# K' C% d& k( r
* E3 w( v+ E/ l5 d6 Z, x4 H    } while (Status == EFI_BUFFER_TOO_SMALL);
    ASSERT (!EFI_ERROR(Status));
) z$ r: R7 ?7 _' c: J  D
5 @$ b& G7 R+ D1 k+ A    NoHandles  = BufferSize / sizeof(EFI_HANDLE);
    Index = 0;
( L+ `2 p3 @) }    ST->ConOut->ClearScreen (ST->ConOut);
    Result = Not_Found_Me;       
    do
( A4 ]! ^. ]$ Y2 Y6 f    {       
        if(Index == NoHandles - 1)
& `, v0 V( r9 D         Index=0;
          else
    Status = BS->HandleProtocol (Handle[Index], &PciIoProtocol, (VOID*)&PCI_DEVICE_TARGET);
        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);          
    }
/ X  h' v  H& R& k0 Z    Index++;               
    } while(Result == Not_Found_Me);
       
        Print(L"Please hit any key to exit this image.");       
, K) w& ^+ Q) O) P* ?* f6 [    WaitForSingleEvent (ST->ConIn->WaitForKey, 0);
: I  z2 H* q* R1 [( Y: ^7 r# W               
    return EFI_SUCCESS;
& H8 |& @5 C4 U: ~}

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