530d68ba19
Signed-off-by: Peter Jones <pjones@redhat.com> Signed-off-by: Nigel Croxon <nigel.croxon@hp.com>
146 lines
4.1 KiB
C
146 lines
4.1 KiB
C
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/*
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* Copyright (C) 2013 Jerry Hoemann <jerry.hoemann@hp.com>
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*
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* Application to allocate memory at EFI. Syntax of command
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* mimics the EFI Boot Service "FreePages."
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*
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* See UEFI spec 2.3, Section 6.2.
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*
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Example freeing a 5 page BS_Code setment at address: 0000000020000000 (hex)
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FS1:\> memmap
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Type Start End #pages Attributes
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BS_Code 0000000000000000-0000000000000FFF 0000000000000001 000000000000000F
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Available 0000000000001000-000000000008DFFF 000000000000008D 000000000000000F
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Reserved 000000000008E000-000000000008FFFF 0000000000000002 000000000000000F
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Available 0000000000090000-000000000009FFFF 0000000000000010 000000000000000F
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Available 0000000000100000-000000000FFFFFFF 000000000000FF00 000000000000000F
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BS_Code 0000000010000000-0000000010061FFF 0000000000000062 000000000000000F
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Available 0000000010062000-000000001FFFFFFF 000000000000FF9E 000000000000000F
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BS_Code 0000000020000000-0000000020004FFF 0000000000000005 000000000000000F
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Available 0000000020005000-000000005DDFFFFF 000000000003DDFB 000000000000000F
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BS_Data 000000005DE00000-000000005DFFFFFF 0000000000000200 000000000000000F
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Available 000000005E000000-000000006DE7CFFF 000000000000FE7D 000000000000000F
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ACPI_NVS 000000006DE7D000-000000006EE7CFFF 0000000000001000 000000000000000F
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BS_Data 000000006EE7D000-00000000709FBFFF 0000000000001B7F 000000000000000F
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Available 00000000709FC000-00000000710E3FFF 00000000000006E8 000000000000000F
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FS1:\> FreePages 0000000020000000 5
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FreePages: __PhysAddr__ __PgCnt__
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__PhysAddr__ 0... 3FFFFFFFFFFF
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__PgCnt__ [0..F000000]
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All numbers hex w/ no leading 0x
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FreePages(20000000,5)
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FS1:\> memmap
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Type Start End #pages Attributes
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BS_Code 0000000000000000-0000000000000FFF 0000000000000001 000000000000000F
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Available 0000000000001000-000000000008DFFF 000000000000008D 000000000000000F
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Reserved 000000000008E000-000000000008FFFF 0000000000000002 000000000000000F
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Available 0000000000090000-000000000009FFFF 0000000000000010 000000000000000F
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Available 0000000000100000-000000000FFFFFFF 000000000000FF00 000000000000000F
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BS_Code 0000000010000000-0000000010061FFF 0000000000000062 000000000000000F
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Available 0000000010062000-000000005DDFFFFF 000000000004DD9E 000000000000000F
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BS_Data 000000005DE00000-000000005DFFFFFF 0000000000000200 000000000000000F
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Available 000000005E000000-000000006DE7CFFF 000000000000FE7D 000000000000000F
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ACPI_NVS 000000006DE7D000-000000006EE7CFFF 0000000000001000 000000000000000F
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BS_Data 000000006EE7D000-00000000709FBFFF 0000000000001B7F 000000000000000F
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Available 00000000709FC000-00000000710E3FFF 00000000000006E8 000000000000000F
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*/
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#include <efi.h>
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#include <efilib.h>
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/*
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* FreePages: __PhysAddr__ __PgCnt__
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*
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*/
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#define MAX_NUM_PAGES 0x000000000F000000
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#define MAX_ADDR ((1ULL << 46) - 1)
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#ifdef DEBUG
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#undef DEBUG
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#endif
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#define DEBUG 0
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EFI_STATUS
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efi_main (EFI_HANDLE image, EFI_SYSTEM_TABLE *systab)
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{
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EFI_STATUS efi_status;
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CHAR16 **argv;
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INTN argc = 0;
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#if DEBUG
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INTN c = 0;
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#endif
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INTN err = 0;
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INTN PgCnt = -1;
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UINTN PhysAddr = 0;
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InitializeLib(image, systab);
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Print(L"FreePages: __PhysAddr__ __PgCnt__\n");
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Print(L"__PhysAddr__ 0... %llx\n", MAX_ADDR);
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Print(L"__PgCnt__ [0..%lx]\n", MAX_NUM_PAGES);
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Print(L"All numbers hex w/ no leading 0x\n");
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Print(L"\n");
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#if DEBUG
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Print(L"Now parse argc/argv\n");
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#endif
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argc = GetShellArgcArgv(image, &argv);
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#if DEBUG
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Print(L"argc = %d\n", argc);
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#endif
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#if DEBUG
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for (c = 0; c < argc; c++ ) {
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Print(L"argv[%d] = <%s>\n", c, argv[c]);
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}
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#endif
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if (argc != 3) {
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Print(L"Invalid argument count\n");
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return EFI_SUCCESS;
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}
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PhysAddr = xtoi(argv[1]);
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PgCnt = xtoi(argv[2]);
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if ( (PgCnt < 0) || (PgCnt > MAX_NUM_PAGES) ) {
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Print(L"Inavlid PgCnt\n");
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err++;
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}
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if ( PhysAddr > MAX_ADDR ) {
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Print(L"Inavlid Address\n");
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err++;
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}
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if ( err ) {
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return EFI_SUCCESS;
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}
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Print(L"FreePages(%lx,%d)\n", PhysAddr, PgCnt);
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efi_status = uefi_call_wrapper(BS->FreePages, 2, PhysAddr, PgCnt);
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if ( EFI_ERROR(efi_status) ) {
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Print(L"Free Pages Failed: %d\n", efi_status);
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return efi_status;
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}
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return EFI_SUCCESS;
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}
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