static void arc_chk_core_config()

in kernel/setup.c [404:449]

• 27 lines of code
• 7 McCabe index (conditional complexity)

static void arc_chk_core_config(void)
{
	struct cpuinfo_arc *cpu = &cpuinfo_arc700[smp_processor_id()];
	int present = 0;

	if (!cpu->extn.timer0)
		panic("Timer0 is not present!\n");

	if (!cpu->extn.timer1)
		panic("Timer1 is not present!\n");

#ifdef CONFIG_ARC_HAS_DCCM
	/*
	 * DCCM can be arbit placed in hardware.
	 * Make sure it's placement/sz matches what Linux is built with
	 */
	if ((unsigned int)__arc_dccm_base != cpu->dccm.base_addr)
		panic("Linux built with incorrect DCCM Base address\n");

	if (CONFIG_ARC_DCCM_SZ * SZ_1K != cpu->dccm.sz)
		panic("Linux built with incorrect DCCM Size\n");
#endif

#ifdef CONFIG_ARC_HAS_ICCM
	if (CONFIG_ARC_ICCM_SZ * SZ_1K != cpu->iccm.sz)
		panic("Linux built with incorrect ICCM Size\n");
#endif

	/*
	 * FP hardware/software config sanity
	 * -If hardware present, kernel needs to save/restore FPU state
	 * -If not, it will crash trying to save/restore the non-existant regs
	 */

	if (is_isa_arcompact()) {
		/* only DPDP checked since SP has no arch visible regs */
		present = cpu->extn.fpu_dp;
		CHK_OPT_STRICT(CONFIG_ARC_FPU_SAVE_RESTORE, present);
	} else {
		/* Accumulator Low:High pair (r58:59) present if DSP MPY or FPU */
		present = cpu->extn_mpy.dsp | cpu->extn.fpu_sp | cpu->extn.fpu_dp;
		CHK_OPT_STRICT(CONFIG_ARC_HAS_ACCL_REGS, present);

		dsp_config_check();
	}
}