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

kaurohy

/*
* myfileio.c
% q7 {( v5 B' X, w8 [ * Apps
*/
! @( P# Y! t) ]- j  C8 s& G
#include "efi.h"
#include "efilib.h"
: X2 ~( ]; b% A0 T; `+ F
#define FILE_ATTRIB_CREATENEW         EFI_FILE_MODE_READ  | EFI_FILE_MODE_WRITE | EFI_FILE_MODE_CREATE

7 C1 B) `8 C" C& @$ m- V4 M8 {% bstatic EFI_STATUS WaitForKeyOrReset(VOID)
% u; R0 ~% V" `6 U" M{
- m4 V- ]' }1 e4 V' C# v! D/ c' t    EFI_STATUS          Status;
    EFI_INPUT_KEY       key;
    UINTN               index;
   
    for(;;) {
0 s/ l6 x+ d! c& l        Status = ST->ConIn->ReadKeyStroke(ST->ConIn, &key);
( V: \# z$ X  K) j1 X- y        if (Status == EFI_NOT_READY)
0 k7 M# n0 e9 F  P$ @, u: q            BS->WaitForEvent(1, &ST->ConIn->WaitForKey, &index);
+ d) E4 Z7 x! Y. J6 Z        else
            break;
    }
8 d: O; ~. Z- ?8 O    if (!EFI_ERROR(Status)) {
$ h5 z5 x. D& t        if (key.ScanCode == SCAN_ESC)
            RT->ResetSystem(EfiResetCold, EFI_SUCCESS, 0, NULL);
    }
4 H# b( ?; |% K9 N3 q   
    return Status;
3 P3 E- `% u6 C' D7 y* i9 T! q}

) m( o; t. Y+ y5 N$ {4 BEFI_STATUS
  q  z/ Q+ i# M: i( _EFIAPI
, V5 W5 m, L4 MMyfileioMain (IN EFI_HANDLE           ImageHandle,
' B7 S& o3 \! D             IN EFI_SYSTEM_TABLE     *SystemTable)
# A, u9 Z' \8 N" L5 I% w  J3 i{
; {2 Y" ]5 j. _/ ~8 k, Q    EFI_STATUS                Status;
    EFI_HANDLE                *DestAddr;       
$ M5 P: Q2 v  E1 C! A2 g% T    EFI_LOADED_IMAGE        *FileHandle01;
$ u$ }1 b  i$ H7 C$ s' s    EFI_DEVICE_PATH        *FileHandle02;       
. I* p% i' G& S$ S# i8 z" m    EFI_FILE_IO_INTERFACE        *FileHandle03;
9 F) x9 T2 K& I' J' k    EFI_FILE                *FileHandle04;
    EFI_FILE                *FileHandle05;
    CHAR16                *FileName;
( K; g8 z( `0 C: f6 y2 S" Q        CHAR16      *BufferA, *BufferB, *BufferC, *Space_Key;
, e% M$ M) A( H7 ]  O4 e    UINTN                BufferSize = 8, BufferSizeKeySpace = 2;
    int         Bit0, Bit1, Key_Space;       

5 q' J& l" I2 q, Q5 h0 N    FileName = L"NewFile.txt";
  [+ k; _5 T; o# m        Space_Key = L" ";
0 U: u( i2 e4 u       
        BufferA = L"ABCD";
        BufferB = L"EFGH";
        BufferC = L"IJKL";
  N) O! ^6 s: o/ n6 n  O
        Bit0 = 0xff;
        Bit1 = 0xfe;
# `) u, W; d& W1 K8 T       
        Key_Space = 0x0020;
       
  G5 i. c8 q, A; E" u3 {    InitializeLib (ImageHandle, SystemTable);       

9 W2 A" m) G9 Q- f: H$ h    DestAddr = AllocatePool (BufferSize);       
; k2 T) o$ r9 }$ o
    Print (L"Value of Bit0 is %x\n", Bit0);
0 L) S; X' _" e9 E: C0 J    Print (L"Value of Bit1 is %x\n", Bit1);       

       
6 V7 o) a8 Y) c  {1 `: Z    Status = BS->HandleProtocol(ImageHandle, &LoadedImageProtocol, (VOID*)&FileHandle01);
. b/ s1 h6 s4 N/ |. t! h& d/ G    if (EFI_ERROR(Status)) {
% w/ R6 W4 R- _" ~, \        Print (L"Could not obtain Image, FileHandle01 err code is %x\n",Status);
/ S9 c4 Z7 b) `: @( ^* ?        return EFI_LOAD_ERROR;
    }
( j! j+ R! T, {/ v
    Status = BS->HandleProtocol(FileHandle01->DeviceHandle,&DevicePathProtocol,(VOID*)&FileHandle02);
- J* S9 L0 o& {; z3 S    if (EFI_ERROR(Status)) {
            Print (L"Could not obtain Device Path, FileHandle02 err code is %x\n",Status);
. @& N* w( l0 l' a, H1 M% {            return EFI_LOAD_ERROR;
        }       
       
: T+ \5 W3 i  H' ~    Status = BS->HandleProtocol (FileHandle01->DeviceHandle,&FileSystemProtocol,(VOID*)&FileHandle03);
    if (EFI_ERROR(Status)) {
            Print (L"Could not obtain File System, FileHandle03 err code is %x\n",Status);
            return EFI_LOAD_ERROR;
. o  z3 g3 z# [* N' h        }
0 H/ |& Q/ \/ i/ [4 ]8 q, v9 ~
    Status = FileHandle03->OpenVolume(FileHandle03, &FileHandle04);
    if (EFI_ERROR(Status)) {
* \! A( \# A  z9 ?2 _8 X$ t6 l        Print (L"Could not open volume, FileHandle04 err code is %x\n",Status);
        return EFI_LOAD_ERROR;
    }               
7 M/ g2 O% |& X+ p; I: ~0 b0 e! x               
3 w# U# S: ?$ y( b+ w    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);
% X' R' G- w& L7 E$ _0 a# r' @5 X1 \        return EFI_LOAD_ERROR;
    }
       
/ @# i: I8 D8 A8 {$ z+ y% E    Status = FileHandle05->SetPosition(FileHandle05, 0);       
$ a$ |8 d% k3 T0 e. P8 ?    if (EFI_ERROR(Status)) {
        Print (L"Could not do SetPositioon to the file, FileHandle05 err code is %x\n",Status);
7 O7 v5 Z+ V2 R1 y6 A" C        return EFI_SUCCESS;
    }
       
    Status = FileHandle05->Write(FileHandle05, &BufferSize, &Bit0);
        Print (L"File Buffersize is %x\n\n", BufferSize);
    if (EFI_ERROR(Status)) {
3 N; v7 w1 g: m: F: H        Print (L"Could not write file, FileHandle05 err code is %x\n\n",Status);
1 s, Y, ]5 C# c! A( K        return EFI_SUCCESS;
    }       

    Status = FileHandle05->SetPosition(FileHandle05, 1);       
- W' F) i, _9 |" o( Z4 p/ E    if (EFI_ERROR(Status)) {
% e$ V$ {* f. W  ~+ Y5 }        Print (L"Could not do SetPositioon to the file, FileHandle05 err code is %x\n",Status);
+ U4 F" ?1 ], c9 ]( L. z3 n* b9 p        return EFI_SUCCESS;
. b' _3 ~) \7 [$ W, {/ m    }
       
    Status = FileHandle05->Write(FileHandle05, &BufferSize, &Bit1);
5 B6 r' `4 F% |( f7 F! U# _        Print (L"File Buffersize is %x\n\n", BufferSize);
    if (EFI_ERROR(Status)) {
% A" A" z! q/ O( t2 x" A0 P4 Y        Print (L"Could not write file, FileHandle05 err code is %x\n\n",Status);
2 q. d1 P1 y" ~4 C' F        return EFI_SUCCESS;
    }               
: _" G$ O- x! c; l! ^       
8 ^! H( w( }$ ~5 D    Status = FileHandle05->SetPosition(FileHandle05, 2);       
+ f& ^8 f6 k; Q% @; [    if (EFI_ERROR(Status)) {
+ M5 d* P4 U9 s/ u6 U7 j. f        Print (L"Could not do SetPositioon to the file, FileHandle05 err code is %x\n",Status);
        return EFI_SUCCESS;
    }
       
  S, M( v0 d5 B, P" g; O: d2 j    Status = FileHandle05->Write(FileHandle05, &BufferSize, BufferA);
        Print (L"File Buffersize is %x\n\n", BufferSize);
    if (EFI_ERROR(Status)) {
% v1 v. X9 K; p& S2 i( ~        Print (L"Could not write file, FileHandle05 err code is %x\n\n",Status);
& W9 ~* N. x( ]        return EFI_SUCCESS;
4 [5 S4 L5 X  x) L5 I. L" x    }       
. y- a5 D/ L6 ~' L, `
4 B! i! Y- `" ^& z8 p; F* L//--------------------------------------------------------------------------------------------------------------------------------------------------------------->>>
    Print (L"Before Read FileHandle05 file Data of BufferB is %s\n\n",BufferB);
    Status = FileHandle05->SetPosition(FileHandle05, 2);       
& T; O6 T: e% Y/ y2 y1 i    if (EFI_ERROR(Status)) {
        Print (L"Could not do SetPositioon to the file, FileHandle05 err code is %x\n",Status);
        return EFI_SUCCESS;
    }
) ?1 z, O8 h* S
    Status = FileHandle05->Read(FileHandle05, &BufferSize, BufferB);
    if (EFI_ERROR(Status)) {
        Print (L"Could not read file, FileHandle05 err code is %x\n",Status);
% R8 y' |; f3 b8 I6 E/ [        return EFI_SUCCESS;
6 ~8 G. J9 L  n) }$ A0 y. f    }       
: b9 r( `# l& V2 d        Print(L"1. After Read FileHandle05 file of Data of BufferSize is %d and Data of BufferB is %s\n\n", BufferSize, BufferB);
6 w/ T, ]- \( A/ M2 e//---------------------------------------------------------------------------------------------------------------------------------------------------------------<<<

! |+ v( N" t& b& z( s    Status = FileHandle05->SetPosition(FileHandle05, 10);       
    if (EFI_ERROR(Status)) {
& L) n; X. `# L1 F6 N' D        Print (L"Could not do SetPositioon to the file, FileHandle05 err code is %x\n",Status);
        return EFI_SUCCESS;
; E2 Z' p, Q3 t" e& J; \5 q    }
       
    Status = FileHandle05->Write(FileHandle05, &BufferSizeKeySpace, Space_Key);
    if (EFI_ERROR(Status)) {
4 Q2 R0 v3 b, E$ p- b5 n: r        Print (L"Could not write file, FileHandle05 err code is %x\n",Status);
8 X) a0 q$ K7 S: ?: \7 ^8 N$ }        return EFI_SUCCESS;
' S2 P3 B7 ^( |    }

: a1 M2 }6 U2 Q; h# K& R    Status = FileHandle05->SetPosition(FileHandle05, 12);       
    if (EFI_ERROR(Status)) {
' q% J7 |1 r) M1 U, c( S0 x3 I( d/ \        Print (L"Could not do SetPositioon to the file, FileHandle05 err code is %x\n",Status);
; U  Y' ]3 t, M7 I7 A: _        return EFI_SUCCESS;
6 {' j- _( Z* \/ Y2 E6 @/ u$ W    }
- a7 D- B  I6 L( H- }, }8 A# A       
    Status = FileHandle05->Write(FileHandle05, &BufferSizeKeySpace, Space_Key);
5 ]" \1 k) Q- @- P    if (EFI_ERROR(Status)) {
        Print (L"Could not write file, FileHandle05 err code is %x\n",Status);
        return EFI_SUCCESS;
1 o2 Z' o2 Y7 Q; I/ ]    }
5 c- v9 H: U: P
8 `% S3 C' ~/ i5 F: n' @    Status = FileHandle05->SetPosition(FileHandle05, 14);       
    if (EFI_ERROR(Status)) {
6 \* A8 B+ k+ b0 q3 k        Print (L"Could not do SetPositioon to the file, FileHandle05 err code is %x\n",Status);
        return EFI_SUCCESS;
    }
, {4 r' T( U0 K+ a( y& J       
$ g. j8 J3 x" O    Status = FileHandle05->Write(FileHandle05, &BufferSizeKeySpace, Space_Key);
* P; r$ s6 ?( X$ G' J    if (EFI_ERROR(Status)) {
        Print (L"Could not write file, FileHandle05 err code is %x\n",Status);
        return EFI_SUCCESS;
# g& a- X; X+ u( h/ h4 U    }
( ?1 e* {3 ^  }  v  P
    Status = FileHandle05->SetPosition(FileHandle05, 16);       
0 z! F# V* I, j' R- B! f# T& @+ 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 `6 _" n  T% k1 `4 W- l    }
       
- Q5 w' K3 M, j    Status = FileHandle05->Write(FileHandle05, &BufferSizeKeySpace, Space_Key);
    if (EFI_ERROR(Status)) {
6 o* ]1 w% l. y. s7 j        Print (L"Could not write file, FileHandle05 err code is %x\n",Status);
$ m. V( B  X4 K* d        return EFI_SUCCESS;
0 ?8 g, x, S' G8 r    }       

//---------------------------------------------------------------------------------------------------------------------------------------------------------------

% E9 m7 H; p! W" s    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;
7 R' g0 Z/ m. }0 c& T; y    }
( y) K0 Z% ?5 \* B% k( L, V. q- Z       
7 ^* j* h2 ~3 @; t$ L    Status = FileHandle05->Write(FileHandle05, &BufferSize, BufferC);
7 m0 I: }7 @9 ?) a3 z3 m    if (EFI_ERROR(Status)) {
% ?  H8 Q/ Q) `        Print (L"Could not write file, FileHandle05 err code is %x\n",Status);
        return EFI_SUCCESS;
. o/ Y  Q8 K) V% l5 w    }       
       
    FreePool(DestAddr);       

5 l) M  [5 `7 G: d( u; P! ~    Status = FileHandle05->Close(FileHandle05);
  O4 r$ ?; ~' D( Q7 K5 G    if (EFI_ERROR(Status)) {
        Print (L"Could not close file, FileHandle05 err code is %x\n",Status);
        return EFI_SUCCESS;
    }
8 o( l1 }4 o0 A! l4 `5 k       
    Print(L"File Name = %s has already been created.\n", FileName);
' |# V6 c  R" B/ Q/ {6 t
    Print(L"\nPress ESC to reboot or any other key to return control to the firmware.\n\n");
* @* L; `" g" V2 d8 K" _    WaitForKeyOrReset();

; e( N; X% [; E3 I! G, T) G    return Status;
}

chenhy

//**********************************************************************
//**********************************************************************
//** Demo code for PCI configuration space I/O access program **
% Y+ x* X  O9 G8 Y- }7 c  j2 M//** By Lawrence 2009/11/20 @Taiwan**                          
9 X. t+ Z; A( E4 J8 S//**********************************************************************
' e/ X8 E3 }' O//**********************************************************************

#include "efi.h"
$ k) o3 g, z: L& k7 E7 D) f0 Z#include "efilib.h"
) F$ S* K% T) c4 M4 }: V* V# A
0 d1 v6 w3 r4 C9 T#define        Not_Found_Me        0x00000000
& j. D6 `0 G- S# ^7 [1 G+ E; G#define        Found_Me        0x00000001
) G$ v4 \5 y% w- l1 `' c' W: H
' Y# G' r0 h: U. F/ Xstatic EFI_STATUS WaitForKeyOrReset(VOID)
1 I$ ?, o2 S$ W' F/ H{
" c0 O. h: U+ r6 B' @9 s% ]: e  P    EFI_STATUS          Status;
/ z; J3 `0 M: q0 v2 m! D    EFI_INPUT_KEY       key;
    UINTN               index;
! v0 I3 P1 J' x  G5 e: Z   
    for(;;) {
        Status = ST->ConIn->ReadKeyStroke(ST->ConIn, &key);
        if (Status == EFI_NOT_READY)
            BS->WaitForEvent(1, &ST->ConIn->WaitForKey, &index);
+ n2 D  ?% @4 F# ~! \        else
" T* F4 \7 [+ p* P+ n            break;
  l/ {2 W' D! h& ~    }
    if (!EFI_ERROR(Status)) {
# n" v5 m9 z# j) V" m        if (key.ScanCode == SCAN_ESC)
            RT->ResetSystem(EfiResetCold, EFI_SUCCESS, 0, NULL);
  s" B! G$ U( W+ p6 p# [; ]    }
   
    return Status;
- [1 `) y) Z6 a}
1 O3 r% p2 ^: y0 |. A- n: d4 M
UINTN
$ ~$ V7 m3 H% bAccessPciConfig (
+ U* j# M- d+ `7 ~    IN  EFI_PCI_IO_PROTOCOL              *PCI_DEVICE_TARGET
    )
{
" W' v2 q: t5 r1 b8 o0 J        UINT8  i;
0 o4 c- p% Y9 ?/ W; x" M        UINTN  PCI_ATTR[4];
) a* a1 ?0 m! F, U$ Y+ p        UINT8  PCI_REG[4], pci_offset=0;
; K& Z% F/ t, m
8 o& h" N% q  p; d9 c2 p  B        //get device attr
$ }5 ^: s" g2 a* r1 z. M        PCI_DEVICE_TARGET->GetLocation(PCI_DEVICE_TARGET,PCI_ATTR,PCI_ATTR+1,PCI_ATTR+2,PCI_ATTR+3);       
: }$ k0 N" A9 o/ L    if ((PCI_ATTR[1] == 0x00) && (PCI_ATTR[2] == 0x1e) && (PCI_ATTR[3] == 0x00)){
$ L+ b/ C- e1 M$ \! c5 Z2 |; h" I          Print (L"Device found at BUS = %02x         DEV= %02x        FUN= %02x  \n",PCI_ATTR[1],PCI_ATTR[2],PCI_ATTR[3]);
& \. k7 p$ D0 y, E          ST->ConOut->SetAttribute (ST->ConOut, EFI_TEXT_ATTR (EFI_GREEN, EFI_BLACK));       
          //print register value
( U" C7 m- V# ^7 D1 j          for (i = 0;i < 4;i++)
# f) G" o! N* a( i& e          {
        PCI_DEVICE_TARGET->Pci.Read (PCI_DEVICE_TARGET,0,pci_offset,4,PCI_REG);
                Print(L"Register0x%d value = %02x \n",i, PCI_REG);
, G$ P( ?' }5 L+ p8 ]          }
' Z; [& S& A* Y: @4 f( b- |          Print(L"\n");          
          ST->ConOut->SetAttribute (ST->ConOut, EFI_TEXT_ATTR (EFI_WHITE, EFI_BLACK));                  
          return Found_Me;
    }
0 b) {: Z( i! r. r
9 b7 D: J3 a6 ~        return Not_Found_Me;
}
) U% b: U' j4 j/ A* N9 @  L
EFI_STATUS
! O$ \& y+ }( A, o( vInitializePciApplication (
" J3 b* r( X' q) y" J, e( x3 X    IN EFI_HANDLE           ImageHandle,
* z9 Z/ I+ A: a( t2 e    IN EFI_SYSTEM_TABLE     *SystemTable
    )
# D% q- h6 U" K* `; K' e% g{
  EFI_STATUS              Status;
  W- p* `1 E& d2 E% j9 Q4 G( ^* a6 H  EFI_HANDLE              *Handle;
# A# ~6 ]) U: H+ G, r- r- A8 s5 v  UINTN                   BufferSize, Result;
" o; a5 u: w5 [9 E5 ~  UINTN                   NoHandles, Index;
  f3 s* g' _5 e1 w& w! X  EFI_PCI_IO_PROTOCOL          *PCI_DEVICE_TARGET;

8 ?8 \2 g3 h7 I    //
4 }7 L, h0 b) U    // Initialize the Library.
" U. O; W/ o0 R) c" _/ W5 X* e/ m    //
3 S7 C' O! ?' J9 k    InitializeLib (ImageHandle, SystemTable);
$ K3 ?& [% c& u0 q) x( A2 P3 \    //
    // Find the PCI driver
9 U; \; }( ~3 i* p    //
    Handle = NULL;
: w7 R9 E. F4 d1 P    BufferSize = 1;
9 J2 k- i  Z$ O1 G2 P8 {- k& Q& S8 f    do
    {
      if (Handle)
4 f! L  A/ I+ H( h8 S8 M; a8 P      {
        FreePool (Handle);
5 L. \, ?' t/ Q, a% u      }
               
      Handle = AllocatePool (BufferSize);
) p9 Q( X, {1 J6 J9 f" X) j( i      Status = BS->LocateHandle (ByProtocol, &PciIoProtocol, NULL, &BufferSize, Handle);

" ?* m2 z/ x; C; z( Z9 w; q    } while (Status == EFI_BUFFER_TOO_SMALL);
    ASSERT (!EFI_ERROR(Status));

    NoHandles  = BufferSize / sizeof(EFI_HANDLE);
: U+ G. Z( C( t- S    Index = 0;
    ST->ConOut->ClearScreen (ST->ConOut);
5 X# ]! @* y, Z4 D/ d( a$ o    Result = Not_Found_Me;       
0 j1 n2 E, g* o; B9 Q    do
- |1 C) c2 h9 d, c1 ^  Z! {    {       
5 U$ ?' |6 P8 [/ y6 Y        if(Index == NoHandles - 1)
         Index=0;
9 v  \7 z7 U* i: ]: `$ `          else
( V! v5 t( i8 n# p" `, }    Status = BS->HandleProtocol (Handle[Index], &PciIoProtocol, (VOID*)&PCI_DEVICE_TARGET);
/ u; X$ t; L1 Z" n$ \/ v0 Z8 H. A        Print(L"THIS IS DEVICE %d \n",Index);
9 l# B2 t! A8 X- A    if (!EFI_ERROR(Status))
    {
          Result = AccessPciConfig(PCI_DEVICE_TARGET);
5 |; {" }  Y& R7 n% _# `- n//-          Print(L"Again now Result is %x \n",Result);          
' o6 r( ?9 N* z8 ]    }
    Index++;               
    } while(Result == Not_Found_Me);
7 g+ g8 R+ q$ ]3 A2 P( [; Y& B       
# J; y# ?' I6 D4 @        Print(L"Please hit any key to exit this image.");       
    WaitForSingleEvent (ST->ConIn->WaitForKey, 0);
               
    return EFI_SUCCESS;
1 p' K& W' H$ G  \/ ?2 |0 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