source: bootcd/isolinux/syslinux-6.03/gnu-efi/gnu-efi-3.0/apps/FreePages.c @ e16e8f2

Last change on this file since e16e8f2 was e16e8f2, checked in by Edwin Eefting <edwin@datux.nl>, 3 years ago

bootstuff
  • Property mode set to 100644
File size: 4.5 KB
Line 
1
2
3/*
4 * Copyright (C) 2013 Jerry Hoemann <jerry.hoemann@hp.com>
5 *
6 * Application to allocate memory at EFI.  Syntax of command
7 * mimics the EFI Boot Service "FreePages."
8 *
9 * See UEFI spec 2.3, Section 6.2.
10 *
11
12Example freeing a 5 page BS_Code setment at address: 0000000020000000 (hex)
13
14
15FS1:\> memmap
16Type      Start            End              #pages             Attributes
17BS_Code   0000000000000000-0000000000000FFF 0000000000000001 000000000000000F
18Available 0000000000001000-000000000008DFFF 000000000000008D 000000000000000F
19Reserved  000000000008E000-000000000008FFFF 0000000000000002 000000000000000F
20Available 0000000000090000-000000000009FFFF 0000000000000010 000000000000000F
21Available 0000000000100000-000000000FFFFFFF 000000000000FF00 000000000000000F
22BS_Code   0000000010000000-0000000010061FFF 0000000000000062 000000000000000F
23Available 0000000010062000-000000001FFFFFFF 000000000000FF9E 000000000000000F
24BS_Code   0000000020000000-0000000020004FFF 0000000000000005 000000000000000F
25Available 0000000020005000-000000005DDFFFFF 000000000003DDFB 000000000000000F
26BS_Data   000000005DE00000-000000005DFFFFFF 0000000000000200 000000000000000F
27Available 000000005E000000-000000006DE7CFFF 000000000000FE7D 000000000000000F
28ACPI_NVS  000000006DE7D000-000000006EE7CFFF 0000000000001000 000000000000000F
29BS_Data   000000006EE7D000-00000000709FBFFF 0000000000001B7F 000000000000000F
30Available 00000000709FC000-00000000710E3FFF 00000000000006E8 000000000000000F
31
32
33FS1:\> FreePages 0000000020000000 5
34FreePages: __PhysAddr__ __PgCnt__
35__PhysAddr__   0... 3FFFFFFFFFFF
36__PgCnt__     [0..F000000]
37All numbers hex w/ no leading 0x
38
39FreePages(20000000,5)
40
41
42
43FS1:\> memmap
44Type      Start            End              #pages             Attributes
45BS_Code   0000000000000000-0000000000000FFF 0000000000000001 000000000000000F
46Available 0000000000001000-000000000008DFFF 000000000000008D 000000000000000F
47Reserved  000000000008E000-000000000008FFFF 0000000000000002 000000000000000F
48Available 0000000000090000-000000000009FFFF 0000000000000010 000000000000000F
49Available 0000000000100000-000000000FFFFFFF 000000000000FF00 000000000000000F
50BS_Code   0000000010000000-0000000010061FFF 0000000000000062 000000000000000F
51Available 0000000010062000-000000005DDFFFFF 000000000004DD9E 000000000000000F
52BS_Data   000000005DE00000-000000005DFFFFFF 0000000000000200 000000000000000F
53Available 000000005E000000-000000006DE7CFFF 000000000000FE7D 000000000000000F
54ACPI_NVS  000000006DE7D000-000000006EE7CFFF 0000000000001000 000000000000000F
55BS_Data   000000006EE7D000-00000000709FBFFF 0000000000001B7F 000000000000000F
56Available 00000000709FC000-00000000710E3FFF 00000000000006E8 000000000000000F
57
58
59 */
60
61#include <efi.h>
62#include <efilib.h>
63#include <argify.h>
64
65/*
66 * FreePages:  __PhysAddr__ __PgCnt__
67 *
68 */
69
70#define MAX_NUM_PAGES 0x000000000F000000
71
72#define MAX_ADDR ((1ULL << 46) - 1)
73
74#ifdef DEBUG
75#undef DEBUG
76#endif
77#define DEBUG 0
78
79
80EFI_STATUS
81efi_main (EFI_HANDLE image, EFI_SYSTEM_TABLE *systab)
82{
83
84        EFI_STATUS efi_status;
85        EFI_GUID LoadedImageProtocol = LOADED_IMAGE_PROTOCOL;
86        EFI_LOADED_IMAGE *info;
87
88        CHAR16 arglist[MAX_ARGS+1] = {0};
89        CHAR16 *argv[MAX_ARGS];
90        INTN argc = 0;
91        INTN err = 0;
92
93        INTN PgCnt = -1;
94        UINTN PhysAddr = 0;
95
96        InitializeLib(image, systab);
97
98        efi_status = uefi_call_wrapper( BS->HandleProtocol, 3, image,
99                &LoadedImageProtocol, &info);
100
101
102        Print(L"FreePages: __PhysAddr__ __PgCnt__\n");
103        Print(L"__PhysAddr__   0... %llx\n", MAX_ADDR);
104        Print(L"__PgCnt__     [0..%lx]\n", MAX_NUM_PAGES);
105        Print(L"All numbers hex w/ no leading 0x\n");
106        Print(L"\n");
107
108#if DEBUG
109        Print(L"%s\n", info->LoadOptions);
110#endif
111
112
113#if DEBUG
114        Print(L"Set up arglist\n");
115#endif
116        CopyMem(arglist, info->LoadOptions, info->LoadOptionsSize);
117#if DEBUG
118        Print(L"arglist = <%s>\n", arglist);
119#endif
120       
121#if DEBUG
122        Print(L"Now try argify\n");
123#endif
124        argc = argify(arglist, info->LoadOptionsSize, argv);
125#if DEBUG
126        Print(L"argc = %d\n", argc);
127#endif
128
129#if DEBUG
130        for (c = 0;  c < argc;  c++ ) {
131                Print(L"argv[%d] = <%s>\n", c, argv[c]);
132        }
133#endif
134        if (argc != 3) {
135                Print(L"Invalid argument count\n");
136                return EFI_SUCCESS;
137        }
138
139        PhysAddr = xtoi(argv[1]);
140        PgCnt    = xtoi(argv[2]);
141
142        if ( (PgCnt < 0) || (PgCnt > MAX_NUM_PAGES) ) {
143                Print(L"Inavlid PgCnt\n");
144                err++;
145        }
146        if ( PhysAddr > MAX_ADDR ) {
147                Print(L"Inavlid Address\n");
148                err++;
149        }
150        if ( err ) {
151                return EFI_SUCCESS;
152        }
153
154        Print(L"FreePages(%lx,%d)\n", PhysAddr, PgCnt);
155
156        efi_status = uefi_call_wrapper(BS->FreePages, 2, PhysAddr, PgCnt);
157
158        if ( EFI_ERROR(efi_status) ) {
159                Print(L"Free Pages Failed: %d\n", efi_status);
160                return efi_status;
161        }
162
163        return EFI_SUCCESS;
164}
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