[U-Boot-Users] possible ELDK4 gcc compiler bug

[Matthias Fuchs <matthias.fuchs@esd-electronics.com>]

On Thursday 07 December 2006 17:38, Pantelis Antoniou wrote:
> 
> But you should really be using accessors...
You might be right, but I really like to lay a struct over a IO-controllers 
registers.

Do so with accessors result in code like this (still missing some casts):

out32(&(fpga->fifo[i].ctrl), in32(&(fpga->fifo[i].ctrl)) | 0x8000);

Is this really recommended?

For simple IO operations 

out32(FPGA_FIFO_CTRL, in32(FPGA_FIFO_CTRL) | 0x8000);

is fine. But with a more complex register layout like this:

struct pmc405v2_fpga_s {
????????volatile u32 ctrl;
????????volatile u32 status;
????????volatile u32 test1;
????????volatile u32 test2;
????????u32 pad1[0x60 / sizeof(u32) - 4];
????????volatile u32 hostctrl; ? ? ? ? ? ? ? ? ? /* 0x0060 */
????????u32 pad2[0x20 / sizeof(u32) - 1];
????????struct pmc405v2_fifo_s fifo[FIFO_COUNT]; /* 0x0080..0x009f */
};

It results in ugly code.

Matthias

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