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dpavlin |
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/* |
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* $Id: test_disk.c,v 1.1 2005/08/09 18:29:20 debug Exp $ |
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* |
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* Test program for dev_disk. This program reads the first two 512-byte |
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* sectors of a disk image, and dumps them in hex/ascii format. |
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* |
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* Compile: |
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* mips64-unknown-elf-gcc -O2 test_disk.c -mips4 -mabi=64 -c |
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* |
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* and link: |
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* mips64-unknown-elf-ld -Ttext 0xa800000000030000 -e f |
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* test_disk.o -o test_disk --oformat=elf64-bigmips |
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* |
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* Run: |
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* gxemul -d disk.img -E testmips test_disk |
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*/ |
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/* Note: The cast to a signed int causes the address to be sign-extended |
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correctly to 0xffffffffb00000xx when compiled in 64-bit mode */ |
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#define PUTCHAR_ADDRESS ((signed int)0xb0000000) |
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#define HALT_ADDRESS ((signed int)0xb0000010) |
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#define DISK_ADDRESS ((signed int)0xb3000000) |
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void printchar(char ch) |
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{ |
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*((volatile unsigned char *) PUTCHAR_ADDRESS) = ch; |
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} |
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void halt(void) |
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{ |
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*((volatile unsigned char *) HALT_ADDRESS) = 0; |
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} |
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void printstr(char *s) |
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{ |
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while (*s) |
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printchar(*s++); |
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} |
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void printhex2(int i) |
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{ |
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printchar("0123456789abcdef"[i >> 4]); |
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printchar("0123456789abcdef"[i & 15]); |
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} |
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void printhex4(int i) |
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{ |
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printhex2(i >> 8); |
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printhex2(i & 255); |
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} |
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void f(void) |
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{ |
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int ofs, scsi_id = 0, status, i; |
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unsigned char ch; |
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printstr("Testing dev_disk.\n"); |
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printstr("Assuming that SCSI ID 0 is available.\n"); |
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for (ofs = 0; ofs < 1024; ofs += 512) { |
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printstr("\n"); |
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*((volatile int *) (DISK_ADDRESS + 0)) = ofs; |
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*((volatile int *) (DISK_ADDRESS + 0x10)) = scsi_id; |
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/* 0 = read, 1 = write: */ |
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*((volatile int *) (DISK_ADDRESS + 0x20)) = 0; |
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/* Get status: */ |
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status = *((volatile int *) (DISK_ADDRESS + 0x30)); |
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if (status == 0) { |
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printstr("Read failed.\n"); |
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halt(); |
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} |
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printstr("Sector dump:\n"); |
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for (i = 0; i < 512; i++) { |
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if ((i % 16) == 0) { |
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printhex4(i); |
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printstr(" "); |
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} |
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printstr(" "); |
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ch = *((volatile unsigned char *) DISK_ADDRESS |
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+ i + 0x4000); |
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printhex2(ch); |
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if ((i % 16) == 15) { |
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int j; |
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printstr(" "); |
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for (j = i-15; j <= i; j++) { |
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ch = *((volatile unsigned char *) |
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DISK_ADDRESS + j + 0x4000); |
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if (ch < 32 || ch >= 127) |
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ch = '.'; |
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printchar(ch); |
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} |
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printstr("\n"); |
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} |
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} |
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} |
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printstr("\nDone.\n"); |
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halt(); |
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} |
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