static inline void cpu_l2cache_op()

in mm/proc.c [410:435]

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

static inline void cpu_l2cache_op(unsigned long start, unsigned long end, unsigned long op)
{
	if (atl2c_base) {
		unsigned long p_start = __pa(start);
		unsigned long p_end = __pa(end);
		unsigned long cmd;
		unsigned long line_size;
		/* TODO Can Use PAGE Mode to optimize if range large than PAGE_SIZE */
		line_size = L2_CACHE_LINE_SIZE();
		p_start = p_start & (~(line_size - 1));
		p_end = (p_end + line_size - 1) & (~(line_size - 1));
		cmd =
		    (p_start & ~(line_size - 1)) | op |
		    CCTL_SINGLE_CMD;
		do {
			L2_CMD_RDY();
			L2C_W_REG(L2_CCTL_CMD_OFF, cmd);
			cmd += line_size;
			p_start += line_size;
		} while (p_end > p_start);
		cmd = CCTL_CMD_L2_SYNC;
		L2_CMD_RDY();
		L2C_W_REG(L2_CCTL_CMD_OFF, cmd);
		L2_CMD_RDY();
	}
}