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Improved memory size measurement. Slower but generates less errors.
Jeandet Alexis -
r114:54b9f2f11e09 0.6 draft
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@@ -1,75 +1,85
1 1 #include "memtester.h"
2 2 #include <socexplorerengine.h>
3 3 #include <socexplorerproxy.h>
4 4
5 5 MemTester::MemTester(QObject* parent)
6 6 :QObject(parent)
7 7 {
8 8
9 9 }
10 10
11 11 MemTester::~MemTester()
12 12 {
13 13
14 14 }
15 15
16 16
17 17 unsigned int p_pow2(unsigned int v)
18 18 {
19 19 static const char LogTable256[256] =
20 20 {
21 21 #define LT(n) n, n, n, n, n, n, n, n, n, n, n, n, n, n, n, n
22 22 -1, 0, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3,
23 23 LT(4), LT(5), LT(5), LT(6), LT(6), LT(6), LT(6),
24 24 LT(7), LT(7), LT(7), LT(7), LT(7), LT(7), LT(7), LT(7)
25 25 };
26 26
27 27 unsigned int r; // r will be lg(v)
28 28 register unsigned int t, tt; // temporaries
29 29
30 30 if (tt = v >> 16)
31 31 {
32 32 r = (t = tt >> 8) ? 24 + LogTable256[t] : 16 + LogTable256[tt];
33 33 }
34 34 else
35 35 {
36 36 r = (t = v >> 8) ? 8 + LogTable256[t] : LogTable256[v];
37 37 }
38 38 return r;
39 39 }
40 40
41 41 unsigned int MemTester::measureMemSize(socexplorerplugin *plugin, unsigned int address, unsigned int maxSize)
42 42 {
43 43 unsigned int curVal=1,testAddress=address;
44 44 unsigned int size=0;
45 45 if(Q_UNLIKELY(!plugin || !plugin->isConnected()))return 0;
46 46 plugin->Write(&curVal,1,testAddress);
47 47 plugin->Read(&curVal,1,testAddress);
48 48 if(Q_UNLIKELY(curVal!=1))
49 49 return size;
50 50 unsigned int max= p_pow2((0xFFFFFFFFFFFFFFFF - address))+1;
51 51 register unsigned int maxSizeLg=p_pow2(maxSize)-1;
52 52 if(max>maxSizeLg)
53 53 max=maxSizeLg;
54 54 if(max>32)max=32;
55 55 for(size=2;size<max;size++) //check each address bit
56 56 {
57 57 testAddress = (unsigned int)(address+(1<<size));
58 58 curVal = (unsigned int)(1<<size);
59 59 plugin->Write(&curVal,1,testAddress);
60 plugin->Read(&curVal,1,testAddress);
61 if((unsigned int)curVal!=(unsigned int)(1<<size))
62 return (1<<(size));
63 plugin->Read(&curVal,1,address);
64 if((curVal==(unsigned int)(1<<size)) && (size!=0))
65 return (1<<(size));
60 if(!MemTester::m_check_space(plugin,address,size))
61 return (1<<(size));
66 62 }
67 63 return (1<<(size+1));
68 64 }
69 65
70 66 unsigned int MemTester::measureMemSize(const QString &plugin, unsigned int address, unsigned int maxSize)
71 67 {
72 return measureMemSize(socexplorerproxy::findPlugin(plugin),address,maxSize);
68 return measureMemSize(socexplorerproxy::findPlugin(plugin),address,maxSize);
69 }
70
71 bool MemTester::m_check_space(socexplorerplugin *plugin,unsigned int address, unsigned int pow)
72 {
73 unsigned int currentAddress=4;
74 unsigned int curVal=0xffffff;
75 while (currentAddress<=(1<<pow))
76 {
77 plugin->Read(&curVal,1,address+currentAddress);
78 if(curVal!=currentAddress)
79 return false;
80 currentAddress = currentAddress <<1;
81 }
82 return true;
73 83 }
74 84
75 85
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@@ -1,19 +1,21
1 1 #ifndef MEMTESTER_H
2 2 #define MEMTESTER_H
3 3 #include <socexplorerplugin.h>
4 4 #include <QObject>
5 5
6 6 class MemTester : public QObject
7 7 {
8 8 Q_OBJECT
9 9 public:
10 10 MemTester(QObject *parent=0);
11 11 ~MemTester();
12 12
13 13 static unsigned int measureMemSize(socexplorerplugin* plugin, unsigned int address,unsigned int maxSize=0xFFFFFFFF);
14 14 static unsigned int measureMemSize(const QString& plugin, unsigned int address,unsigned int maxSize=0xFFFFFFFF);
15 15 public slots:
16 16
17 private:
18 static bool m_check_space(socexplorerplugin* plugin,unsigned int address, unsigned int pow);
17 19 };
18 20
19 21 #endif // MEMTESTER_H
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