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/*
* Copyright (C) 2013 Jerry Hoemann <jerry.hoemann@hp.com>
*
*
* Application to allocate memory at EFI. Syntax of command
* mimics the EFI Boot Service "AllocatePages."
*
* See UEFI spec 2.3, Section 6.2.
*
*
FS1:\> memmap
Type Start End #pages Attributes
BS_Code 0000000000000000-0000000000000FFF 0000000000000001 000000000000000F
Available 0000000000001000-000000000008DFFF 000000000000008D 000000000000000F
Reserved 000000000008E000-000000000008FFFF 0000000000000002 000000000000000F
Available 0000000000090000-000000000009FFFF 0000000000000010 000000000000000F
Available 0000000000100000-000000000FFFFFFF 000000000000FF00 000000000000000F
BS_Code 0000000010000000-0000000010061FFF 0000000000000062 000000000000000F
Available 0000000010062000-000000005CDFFFFF 000000000004CD9E 000000000000000F
ACPI_NVS 000000005CE00000-000000005DDFFFFF 0000000000001000 000000000000000F
BS_Data 000000005DE00000-000000005DFFFFFF 0000000000000200 000000000000000F
Available 000000005E000000-000000005EF1CFFF 0000000000000F1D 000000000000000F
BS_Data 000000005EF1D000-00000000709FBFFF 0000000000011ADF 000000000000000F
Available 00000000709FC000-00000000710E3FFF 00000000000006E8 000000000000000F
LoaderCode 00000000710E4000-00000000711FEFFF 000000000000011B 000000000000000F
Available 00000000711FF000-0000000071901FFF 0000000000000703 000000000000000F
BS_Code 0000000071902000-00000000721FEFFF 00000000000008FD 000000000000000F
Example to allocat 5 pages type BootCode at address 20000000 (hex)
FS1:\> AllocPages.efi 2 3 5 20000000
AllocatePage: __AllocType__ __MemType__ __NumPages__ [__Addr__]
__AllocType__ {0,1,2} -- Any, MaxAddr, Addr
__MemType__ {0..13}, Reserved ==0, LCode==1, LData==2, BSCode==3, BSData==4, ...
__NumPages__ {0..F000000}
[__Addr__] 0... 3FFFFFFFFFFF
All numbers in hex no leading 0x
AllocatPage(2,3,5,20000000)
Example to allocat 5 pages type BootCode at address 30000000 (hex)
FS1:\> AllocPages.efi 2 3 5 30000000
AllocatePage: __AllocType__ __MemType__ __NumPages__ [__Addr__]
__AllocType__ {0,1,2} -- Any, MaxAddr, Addr
__MemType__ {0..13}, Reserved ==0, LCode==1, LData==2, BSCode==3, BSData==4, ...
__NumPages__ {0..F000000}
[__Addr__] 0... 3FFFFFFFFFFF
All numbers in hex no leading 0x
FS1:\> memmap
Type Start End #pages Attributes
BS_Code 0000000000000000-0000000000000FFF 0000000000000001 000000000000000F
Available 0000000000001000-000000000008DFFF 000000000000008D 000000000000000F
Reserved 000000000008E000-000000000008FFFF 0000000000000002 000000000000000F
Available 0000000000090000-000000000009FFFF 0000000000000010 000000000000000F
Available 0000000000100000-000000000FFFFFFF 000000000000FF00 000000000000000F
BS_Code 0000000010000000-0000000010061FFF 0000000000000062 000000000000000F
Available 0000000010062000-000000001FFFFFFF 000000000000FF9E 000000000000000F
BS_Code 0000000020000000-0000000020004FFF 0000000000000005 000000000000000F
Available 0000000020005000-000000002FFFFFFF 000000000000FFFB 000000000000000F
BS_Code 0000000030000000-0000000030004FFF 0000000000000005 000000000000000F
Available 0000000030005000-000000005CDFFFFF 000000000002CDFB 000000000000000F
ACPI_NVS 000000005CE00000-000000005DDFFFFF 0000000000001000 000000000000000F
BS_Data 000000005DE00000-000000005DFFFFFF 0000000000000200 000000000000000F
Available 000000005E000000-000000005EF1CFFF 0000000000000F1D 000000000000000F
BS_Data 000000005EF1D000-00000000709FBFFF 0000000000011ADF 000000000000000F
Available 00000000709FC000-00000000710E3FFF 00000000000006E8 000000000000000F
LoaderCode 00000000710E4000-00000000711FEFFF 000000000000011B 000000000000000F
Available 00000000711FF000-0000000071901FFF 0000000000000703 000000000000000F
BS_Code 0000000071902000-00000000721FEFFF 00000000000008FD 000000000000000F
*/
#include <efi.h>
#include <efilib.h>
#define MAX_NUM_PAGES 0x000000000F000000
#define MAX_ADDR ((1ULL << 46) - 1)
#define MAX_ARGS 256
#define CHAR_SPACE L' '
#define DEBUG 0
INTN
argify(CHAR16 *buf, UINTN len, CHAR16 **argv)
{
UINTN i=0, j=0;
CHAR16 *p = buf;
if (buf == 0) {
argv[0] = NULL;
return 0;
}
/* len represents the number of bytes, not the number of 16 bytes chars */
len = len >> 1;
/*
* Here we use CHAR_NULL as the terminator rather than the length
* because it seems like the EFI shell return rather bogus values for it.
* Apparently, we are guaranteed to find the '\0' character in the buffer
* where the real input arguments stop, so we use it instead.
*/
for(;;) {
while (buf[i] == CHAR_SPACE && buf[i] != CHAR_NULL && i < len) i++;
if (buf[i] == CHAR_NULL || i == len) goto end;
p = buf+i;
i++;
while (buf[i] != CHAR_SPACE && buf[i] != CHAR_NULL && i < len) i++;
argv[j++] = p;
if (buf[i] == CHAR_NULL) goto end;
buf[i] = CHAR_NULL;
if (i == len) goto end;
i++;
if (j == MAX_ARGS-1) {
Print(L"too many arguments (%d) truncating\n", j);
goto end;
}
}
end:
argv[j] = NULL;
return j;
}
EFI_STATUS
efi_main (EFI_HANDLE image, EFI_SYSTEM_TABLE *systab)
{
EFI_STATUS efi_status;
EFI_GUID LoadedImageProtocol = LOADED_IMAGE_PROTOCOL;
EFI_LOADED_IMAGE *info;
CHAR16 arglist[MAX_ARGS+1] = {0};
CHAR16 *argv[MAX_ARGS];
INTN argc = 0;
INTN err = 0;
INTN AllocType = -1;
INTN MemType = -1;
INTN NumPages = -1;
UINTN Addr = 0;
InitializeLib(image, systab);
efi_status = uefi_call_wrapper( BS->HandleProtocol, 3, image,
&LoadedImageProtocol, &info);
Print(L"AllocatePage: __AllocType__ __MemType__ __NumPages__ [__Addr__]\n");
Print(L"__AllocType__ {0,1,2} -- Any, MaxAddr, Addr\n");
Print(L"__MemType__ {0..13}, Reserved ==0, LCode==1, LData==2, BSCode==3, BSData==4, ...\n");
Print(L"__NumPages__ {0..%x}\n", MAX_NUM_PAGES);
Print(L"[__Addr__] 0... %llx\n", MAX_ADDR);
Print(L"All numbers in hex no leading 0x\n");
Print(L"\n");
#if DEBUG
Print(L"%s\n", info->LoadOptions);
#endif
#if DEBUG
Print(L"Set up arglist\n");
#endif
CopyMem(arglist, info->LoadOptions, info->LoadOptionsSize);
#if DEBUG
Print(L"arglist = <%s>\n", arglist);
#endif
#if DEBUG
Print(L"Now try argify\n");
#endif
argc = argify(arglist, info->LoadOptionsSize, argv);
#if DEBUG
Print(L"argc = %d\n", argc);
#endif
#if DEBUG
for (c = 0; c < argc; c++ ) {
Print(L"argv[%d] = <%s>\n", c, argv[c]);
}
#endif
if ( (argc < 3) || (argc > 5) ) {
Print(L"Wrong argument count\n");
return EFI_SUCCESS;
}
AllocType = xtoi(argv[1]);
MemType = xtoi(argv[2]);
NumPages = xtoi(argv[3]);
if ( argc == 5 ) Addr = xtoi(argv[4]);
if ( (AllocType < 0) || (AllocType > 2)) {
Print(L"Invalid AllocType\n");
err++;
}
if ( (MemType < 0) || (MemType > 13) ) {
Print(L"Invalid MemType\n");
err++;
}
if ( (NumPages < 0) || (NumPages > MAX_NUM_PAGES) ) {
Print(L"Inavlid NumPages\n");
err++;
}
if ( Addr > MAX_ADDR ) {
Print(L"Inavlid Address\n");
err++;
}
if ( err ) {
return EFI_INVALID_PARAMETER;
}
Print(L"AllocatPage(%d,%d,%d,%lx)\n", AllocType, MemType, NumPages, Addr);
efi_status = uefi_call_wrapper(BS->AllocatePages, 4, AllocType, MemType, NumPages, &Addr);
if ( EFI_ERROR(efi_status) ) {
Print(L"Allocate Pages Failed: %d\n", efi_status);
return efi_status;
}
return EFI_SUCCESS;
}
|
