59 lines
1.7 KiB
C
59 lines
1.7 KiB
C
#include <command.h>
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#include <string.h>
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// Internal prototype.
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static void address_jump(int argc, char **argv, struct session_s *session, char *info);
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// Define the command block into the cache
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CMDBLOCK("jmp", &address_jump,
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"JMP command help\n"
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"This command takes one\nparameter: the address (hexa)\n"
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"you would jump into the Virtual Memory.\n"
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"\n"
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"Be careful, there is no security"
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"and some parts of the Virtual\n"
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"Memory can make your\ncalculator crash.\n"
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"\n"
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"If a crash occurs, don't worry, you have \"just\" read a\n"
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"non-readable space.\n"
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"Your calculator will continue\nto work perfectly after\nthe reset.\n"
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"\n"
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"Virtual Memory map:\n"
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"Area P0 - 2Go - MMU enable\n"
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"0x00300000 : add-in header\n"
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"0x00300200 : add-in mapping\n"
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"0x08000000 : RAM (cache)\n"
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"Area P1 - 500Mo - MMU disable\n"
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"0x80000000 : ROM (cache)\n"
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"0x88000000 : RAM (cache)\n"
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"Area P2 - 500Mo - MMU disable\n"
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"0xa0000000 : ROM (no cache)\n"
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"0xa8000000 : RAM (no cache)\n"
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"Area P3 - 500Mo - MMU ebable\n"
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"?????? CRASH ??????\n"
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"Area P4 - 500Mo - MMU ~enable\n"
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"0xe0000000 : Store queue area\n"
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"0xe4000000 : MMU disable\n"
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"0xe5000000 : On chip RAM\n"
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"0xe6000000 : MMU disable\n"
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);
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static INLINE int check_address(char *str)
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{
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--str;
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while ((*(++str) >= '0' && *str <= '9') || (*str >= 'a' && *str <= 'f'));
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return ((*str != '\0') ? 1 : 0);
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}
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/* address_jump() - jump into Virtual Memory. */
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static void address_jump(int argc, char **argv, struct session_s *session, char *info)
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{
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if (argc != 2 || check_address(argv[1]) != 0){
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strcpy(info, "arguments error");
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return;
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}
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// clear the lower bits to force align the address.
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// (one instruction takes 2 bytes, so we need to respect the alignment).
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session->anchor = atoi_base(argv[1], 16) >> 1 << 1;
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}
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