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dpavlin |
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/* |
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* $Id: disk.c,v 1.2 2006/05/22 04:53:52 debug Exp $ |
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* |
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* GXemul demo: Disk image access |
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* |
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* This file is in the Public Domain. |
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*/ |
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#include "dev_cons.h" |
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#include "dev_disk.h" |
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#ifdef MIPS |
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/* Note: The ugly cast to a signed int (32-bit) causes the address to be |
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sign-extended correctly on MIPS when compiled in 64-bit mode */ |
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#define PHYSADDR_OFFSET ((signed int)0xa0000000) |
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#else |
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#define PHYSADDR_OFFSET 0 |
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#endif |
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#define PUTCHAR_ADDRESS (PHYSADDR_OFFSET + \ |
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DEV_CONS_ADDRESS + DEV_CONS_PUTGETCHAR) |
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#define HALT_ADDRESS (PHYSADDR_OFFSET + \ |
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DEV_CONS_ADDRESS + DEV_CONS_HALT) |
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#define DISK_ADDRESS (PHYSADDR_OFFSET + DEV_DISK_ADDRESS) |
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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 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 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 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, ide_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 IDE ID 0 (primary master) 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 + DEV_DISK_OFFSET)) = ofs; |
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*((volatile int *) (DISK_ADDRESS + DEV_DISK_ID)) = ide_id; |
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*((volatile int *) (DISK_ADDRESS + DEV_DISK_START_OPERATION)) = |
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DEV_DISK_OPERATION_READ; |
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/* Get status: */ |
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status = *((volatile int *) (DISK_ADDRESS + DEV_DISK_STATUS)); |
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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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+ DEV_DISK_BUFFER + i); |
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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 + DEV_DISK_BUFFER + j); |
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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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