On 23 June 2017 at 16:02, ali saeedi <[email protected]> wrote: > thank you for answer > So. why do we have right shift in qemu by "TARGET_PAGE_BITS" ? for exampe > in below code, what does it mean? > > static inline void cpu_physical_memory_set_dirty_range(ram_addr_t start, > ram_addr_t length) > { > unsigned long end, page; > > end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS; > page = start >> TARGET_PAGE_BITS; > ... > }
If you take an address, and you shift it right by the number of bits in a page, you get a page number... thanks -- PMM
