Reading block from MTD flash with ioremap

Question

I would like to know the expected result of reading block data from MTD flash, as per the code below:

#define PHY_ADDR 0x80000000   // certain physical memory location
void *dst;
dst = ioremap(PHY_ADDR,len);  // ioremapping
mtd_image->_read(mtd, from, len, retlen, dst);  // reading from MTD flash to dst buffer with len length

So will this code write the read data to the physical memory address 0x80000000 ? or will just put the data in the pointer dst? Where I can find the read data in the physical memory (using gdb x/16x memory address for example)?

Answer 1

With ioremap you map physical memory to the pointer dst . This means that mtd_read reads the address range from to from + len on device mtd and writes it to physical address 0x80000000 through pointer dst .