bios: mem_read: reduce number of reads on mapped registers (only supports 32-bit aligned addresses)
Instead of reading each individual byte, causing multiple 4-byte requests to each address, this change results in a single read for each address. Signed-off-by: Matthias Breithaupt <m.breithaupt@vogl-electronic.com>
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03a0a6fd9b
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41b346d141
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@ -18,18 +18,24 @@ extern unsigned int _ftext, _edata_rom;
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#define NUMBER_OF_BYTES_ON_A_LINE 16
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#define NUMBER_OF_BYTES_ON_A_LINE 16
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void dump_bytes(unsigned int *ptr, int count, unsigned long addr)
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void dump_bytes(unsigned int *ptr, int count, unsigned long addr)
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{
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{
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char *data = (char *)ptr;
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uint32_t *dptr = (uint32_t *)ptr;
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char data[NUMBER_OF_BYTES_ON_A_LINE];
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int line_bytes = 0, i = 0;
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int line_bytes = 0, i = 0;
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fputs("Memory dump:", stdout);
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fputs("Memory dump:", stdout);
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while (count > 0) {
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while (count > 0) {
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line_bytes =
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line_bytes =
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(count > NUMBER_OF_BYTES_ON_A_LINE)?
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(count > NUMBER_OF_BYTES_ON_A_LINE)?
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NUMBER_OF_BYTES_ON_A_LINE : count;
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NUMBER_OF_BYTES_ON_A_LINE : count;
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for (i = 0; i < line_bytes; i+=4){
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*((uint32_t*)&data[i]) = *(dptr++);
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}
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printf("\n0x%08lx ", addr);
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printf("\n0x%08lx ", addr);
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for (i = 0; i < line_bytes; i++)
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for (i = 0; i < line_bytes; i++)
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printf("%02x ", *(unsigned char *)(data+i));
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printf("%02x ", (unsigned char)data[i]);
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for (; i < NUMBER_OF_BYTES_ON_A_LINE; i++)
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for (; i < NUMBER_OF_BYTES_ON_A_LINE; i++)
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printf(" ");
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printf(" ");
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@ -37,16 +43,15 @@ void dump_bytes(unsigned int *ptr, int count, unsigned long addr)
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printf(" ");
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printf(" ");
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for (i = 0; i<line_bytes; i++) {
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for (i = 0; i<line_bytes; i++) {
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if ((*(data+i) < 0x20) || (*(data+i) > 0x7e))
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if ((data[i] < 0x20) || (data[i] > 0x7e))
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printf(".");
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printf(".");
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else
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else
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printf("%c", *(data+i));
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printf("%c", data[i]);
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}
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}
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for (; i < NUMBER_OF_BYTES_ON_A_LINE; i++)
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for (; i < NUMBER_OF_BYTES_ON_A_LINE; i++)
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printf(" ");
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printf(" ");
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data += (char)line_bytes;
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count -= line_bytes;
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count -= line_bytes;
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addr += line_bytes;
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addr += line_bytes;
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}
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}
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