PCI config read fails should return all 1 bits.
All unused registers in an existing PCI device should return 0.
Because that's what my Power Mac 8600 returns when I run my Open Firmware lspci command.
Any bus/device/function that doesn't exist returns FF and won't be listed by lspci.
Any registers that are unused will show as 00 in the lspci output.
Make grackle log bus:device.function @register.size in all cases.
setenv doesn't allow entering strings that include multiple lines which is useful for nvramrc.
nvedit uses CTRL-C to end editing, like Open Firmware. It does not support deleting characters from a line or editing previous lines or any other special keys. It doesn't have nvstore or nvquit or nvrecover commands. Basically, you should edit your nvramrc in a text editor, then copy and paste into the debugger.
- Allow changing integer variables. Previously they could not be changed.
- Allow changing string variables. Previously they could only be changed if their length increased.
- printenv had a bug with strings longer than 32 characters.
- printenv now translates carriage return (used in nvramrc) as endl (which should perform carriage return and linefeed)
- For integers, setenv assumes decimal number input but if that fails it will try hex conversion. 0x prefix for hex numbers is optional unless the number only has digits 0 - 9.
- setenv converts linefeed to carriage return for string variables. nvramrc requires this for proper editing in Open Firmware.
- Added Open Firmware 2.4 nvram field names to OfNvramHdr comments.
- increase delay to 800 consecutive characters (reduces times when Open Firmware throws away pasted text)
- don't log the first sock read error (when accept hasn't been called yet) but do log sock read error if accept was called successfully already.
The expansion rom base register indicates the size of the expansion rom by the number of bits that remain zero after code attempts to set them all to 1. For example, a result of fffe0000 means 128K. The 11 least significant bits are ignored in the size calculation, which means the minimum rom size is indicated by fffff800 = 2K.
Handle the case where an expansion rom file might not have a size that is a multiple of 2 or is not greater than 2K.
Bytes between the end of the file and the end of the calculated rom size are set to 0xff.
Don't always return 0 when reading it. The status register contains some bits that Open Firmware uses to set some properties.
A PCI device can set a default status register value to set those bits.
this->status = 0x02B0; // 0000 0 01 0 1 0 1 1 0000 Capabilities List, 66 MHz, Fast Back-to-Back, DevSel Speed: Medium
