void cpu_dma_inval_range()

in mm/proc.c [459:484]

• 25 lines of code
• 4 McCabe index (conditional complexity)

void cpu_dma_inval_range(unsigned long start, unsigned long end)
{
	unsigned long line_size;
	unsigned long old_start = start;
	unsigned long old_end = end;
	unsigned long flags;
	line_size = L1_cache_info[DCACHE].line_size;
	start = start & (~(line_size - 1));
	end = (end + line_size - 1) & (~(line_size - 1));
	if (unlikely(start == end))
		return;
	local_irq_save(flags);
	if (start != old_start) {
		cpu_dcache_wbinval_range(start, start + line_size);
		cpu_l2cache_op(start, start + line_size, CCTL_CMD_L2_PA_WBINVAL);
	}
	if (end != old_end) {
		cpu_dcache_wbinval_range(end - line_size, end);
		cpu_l2cache_op(end - line_size, end, CCTL_CMD_L2_PA_WBINVAL);
	}
	cpu_dcache_inval_range(start, end);
	cpu_l2cache_op(start, end, CCTL_CMD_L2_PA_INVAL);
	__nds32__msync_all();
	local_irq_restore(flags);

}