Curle
d588e232c4
This branch has been dedicated to purely the UEFI bootloader. As such, all other code has been removed. This code can be compiled with Visual Studio, gcc or llvm.
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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EFI_PHYSICAL_ADDRESS 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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