If you look at current board/freescale/p1_p2_rdb/law.c it doesn't have PCI LAWs anymore. I think for your example you just need an empty data structure:
struct law_entry law_table[] = { };
this should hopefully make num_law_entries = 0;
+};
+int num_law_entries = ARRAY_SIZE(law_table);
Unfortunately, having a law_table with no entries causes a bug. A nasty bug which was hard to track down.
When law_table is empty, and when num_law_entries = 0, both variables exist in BSS only.
Both the law_table and num_law_entries are used in init_laws(), called from cpu_init_early_f(). This happens before BSS is initialized. Also before DDR is initialized.
And now you see the bug. The U-Boot hangs due to an invalid memory access. This is before the console is initialized, making it hard to track down.
Yeah, that's nasty. need to think on this a bit to see if I can come up with any good answer.
How do you suggest I work around this? A single redundant entry in the law_table works (the system boots).
For now I'd go with that and add a comment in law.c about it.
- k