On Aug 7, 2006, at 5:44 PM, Timur Tabi wrote:
Kumar Gala wrote:
Is the physical memory map the same on the ITX as it is on the 8349EMDS?
Beats me.
The EMDS has this for the BATs:
#define CFG_PCI1_MEM_BASE 0x80000000 #define CFG_PCI1_MEM_PHYS CFG_PCI1_MEM_BASE #define CFG_PCI1_MEM_SIZE 0x10000000 /* 256M */ #define CFG_PCI1_MMIO_BASE 0x90000000 #define CFG_PCI1_MMIO_PHYS CFG_PCI1_MMIO_BASE #define CFG_PCI1_MMIO_SIZE 0x10000000 /* 256M */ #define CFG_PCI1_IO_BASE 0x00000000 #define CFG_PCI1_IO_PHYS 0xE2000000 #define CFG_PCI1_IO_SIZE 0x00100000 /* 1M */
#define CFG_PCI2_MEM_BASE 0xA0000000 #define CFG_PCI2_MEM_PHYS CFG_PCI2_MEM_BASE #define CFG_PCI2_MEM_SIZE 0x10000000 /* 256M */ #define CFG_PCI2_MMIO_BASE 0xB0000000 #define CFG_PCI2_MMIO_PHYS CFG_PCI2_MMIO_BASE #define CFG_PCI2_MMIO_SIZE 0x10000000 /* 256M */ #define CFG_PCI2_IO_BASE 0x00000000 #define CFG_PCI2_IO_PHYS 0xE2100000 #define CFG_PCI2_IO_SIZE 0x00100000 /* 1M */
Question #1: Why is CFG_PCI1_MEM_PHYS the same as CFG_PCI1_MEM_BASE, but CFG_PCI1_IO_PHYS is not the same as CFG_PCI1_IO_BASE?
Ask me this at lunch one day, its easier to explain in person.
I'm porting the ITX support from an older U-Boot (1.1.3) that was written by another group. This is what they have:
#define CFG_PCI1_MEM_BASE 0x80000000 #define CFG_PCI1_MEM_PHYS CFG_PCI1_MEM_BASE #define CFG_PCI1_MEM_SIZE 0x20000000 /* 512M */ #define CFG_PCI1_IO_BASE 0x00000000 #define CFG_PCI1_IO_PHYS 0xe2000000 #define CFG_PCI1_IO_SIZE 0x1000000 /* 16M */
#define CFG_PCI2_MEM_BASE 0xA0000000 #define CFG_PCI2_MEM_PHYS CFG_PCI2_MEM_BASE #define CFG_PCI2_MEM_SIZE 0x20000000 /* 512M */ #define CFG_PCI2_IO_BASE 0x00000000 #define CFG_PCI2_IO_PHYS 0xe3000000 #define CFG_PCI2_IO_SIZE 0x1000000 /* 16M */
As you can see, some numbers are different, and some are missing. I had to guess what value to use for CFG_PCI1_MMIO_BASE, etc.
Its because I reworked the memory map to support both PCI Memory (prefetchable) and MMIO (non-prefetchable) windows.
I don't know why the PCI sizes are larger on the ITX than on the EMDS. I have no documentation that tells me what these numbers should be.
I'd rework the ITX to match the current EMDS. Also, does the ITX actually have PCI2 accessible or connected to anything?
- kumar