[ECOS] A bug in eCos PCI library for NEC-VRC473...?

[ECOS] A bug in eCos PCI library for NEC-VRC473...?

[Ling Su]

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain, Size: 811 bytes --]

Hello, Jifl,
 
After hacking the eCos hal layer code, I guess following might be a bug in 
the eCos PCI library, please check,
 
In the /hal/mips/vrc4373/include/plf_io.h: #define 
HAL_PCI_PHYSICAL_MEMORY_BASE 0xC000000
In the /hal/mips/vrc4373/src/platform.S: init 2 PCI master 
address windows registers as 0x1c0fd01c and 0x80081080, which means (From 
NEC 4373 manual page 37) only the second one is enabled and mapps CPU (virtual) 
address 0x800xxxxx to PCI physical 0x800xxxxx. Is that correct? Then when I use 
pci library to allocate PCI memory, it always maps to 0xC0xxxxxx. It won't be 
decoded by VR4373, so the PCI can not be accessed via the allocated 
memory.
 
I am not sure it is the problem, if you have time, please take a look, 
thanks!
 
Best Regards,
-Ling