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02a884c0 PA |
1 | /* ----------------------------------------------------------------------- * |
2 | * | |
3 | * Copyright (C) 2009 Intel Corporation. All rights reserved. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of the GNU General Public License version | |
7 | * 2 as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
17 | * 02110-1301, USA. | |
18 | * | |
19 | * H. Peter Anvin <hpa@linux.intel.com> | |
20 | * | |
21 | * ----------------------------------------------------------------------- */ | |
22 | ||
23 | /* | |
24 | * Compute the desired load offset from a compressed program; outputs | |
25 | * a small assembly wrapper with the appropriate symbols defined. | |
26 | */ | |
27 | ||
28 | #include <stdlib.h> | |
29 | #include <stdio.h> | |
30 | #include <string.h> | |
31 | #include <inttypes.h> | |
12871c56 | 32 | #include <tools/le_byteshift.h> |
02a884c0 PA |
33 | |
34 | int main(int argc, char *argv[]) | |
35 | { | |
36 | uint32_t olen; | |
37 | long ilen; | |
38 | unsigned long offs; | |
e6023367 | 39 | unsigned long run_size; |
49449c30 GB |
40 | FILE *f = NULL; |
41 | int retval = 1; | |
02a884c0 | 42 | |
e6023367 JM |
43 | if (argc < 3) { |
44 | fprintf(stderr, "Usage: %s compressed_file run_size\n", | |
45 | argv[0]); | |
49449c30 | 46 | goto bail; |
02a884c0 PA |
47 | } |
48 | ||
49 | /* Get the information for the compressed kernel image first */ | |
50 | ||
51 | f = fopen(argv[1], "r"); | |
52 | if (!f) { | |
53 | perror(argv[1]); | |
49449c30 | 54 | goto bail; |
02a884c0 PA |
55 | } |
56 | ||
57 | ||
58 | if (fseek(f, -4L, SEEK_END)) { | |
59 | perror(argv[1]); | |
60 | } | |
6670e9cd DB |
61 | |
62 | if (fread(&olen, sizeof(olen), 1, f) != 1) { | |
63 | perror(argv[1]); | |
49449c30 | 64 | goto bail; |
6670e9cd DB |
65 | } |
66 | ||
02a884c0 | 67 | ilen = ftell(f); |
12871c56 | 68 | olen = get_unaligned_le32(&olen); |
02a884c0 PA |
69 | |
70 | /* | |
71 | * Now we have the input (compressed) and output (uncompressed) | |
72 | * sizes, compute the necessary decompression offset... | |
73 | */ | |
74 | ||
75 | offs = (olen > ilen) ? olen - ilen : 0; | |
76 | offs += olen >> 12; /* Add 8 bytes for each 32K block */ | |
30314804 | 77 | offs += 64*1024 + 128; /* Add 64K + 128 bytes slack */ |
02a884c0 | 78 | offs = (offs+4095) & ~4095; /* Round to a 4K boundary */ |
e6023367 | 79 | run_size = atoi(argv[2]); |
02a884c0 | 80 | |
041d5f94 | 81 | printf(".section \".rodata..compressed\",\"a\",@progbits\n"); |
02a884c0 PA |
82 | printf(".globl z_input_len\n"); |
83 | printf("z_input_len = %lu\n", ilen); | |
84 | printf(".globl z_output_len\n"); | |
85 | printf("z_output_len = %lu\n", (unsigned long)olen); | |
86 | printf(".globl z_extract_offset\n"); | |
87 | printf("z_extract_offset = 0x%lx\n", offs); | |
88 | /* z_extract_offset_negative allows simplification of head_32.S */ | |
89 | printf(".globl z_extract_offset_negative\n"); | |
90 | printf("z_extract_offset_negative = -0x%lx\n", offs); | |
e6023367 JM |
91 | printf(".globl z_run_size\n"); |
92 | printf("z_run_size = %lu\n", run_size); | |
02a884c0 PA |
93 | |
94 | printf(".globl input_data, input_data_end\n"); | |
95 | printf("input_data:\n"); | |
96 | printf(".incbin \"%s\"\n", argv[1]); | |
97 | printf("input_data_end:\n"); | |
98 | ||
49449c30 GB |
99 | retval = 0; |
100 | bail: | |
101 | if (f) | |
102 | fclose(f); | |
103 | return retval; | |
02a884c0 | 104 | } |