linux-kernel - Re: [PATCH v2 1/2] MIPS: cpu-probe: move fpu probing/handling into its own file

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Message-ID: <alpine.LFD.2.21.2010100128110.866917@eddie.linux-mips.org>
Date:   Sat, 10 Oct 2020 01:30:38 +0100 (BST)
From:   "Maciej W. Rozycki" <macro@...ux-mips.org>
To:     Thomas Bogendoerfer <tsbogend@...ha.franken.de>
cc:     linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/2] MIPS: cpu-probe: move fpu probing/handling into
 its own file

On Thu, 8 Oct 2020, Thomas Bogendoerfer wrote:

> +			/*
> +			 * MAC2008 toolchain never landed in real world, so we're only
> +			 * testing whether it can be disabled and don't try to enabled
> +			 * it.
> +			 */
> +			fcsr0 = fcsr & ~(FPU_CSR_ABS2008 | FPU_CSR_NAN2008 | FPU_CSR_MAC2008);
> +			write_32bit_cp1_register(CP1_STATUS, fcsr0);
> +			fcsr0 = read_32bit_cp1_register(CP1_STATUS);
> +
> +			fcsr1 = fcsr | FPU_CSR_ABS2008 | FPU_CSR_NAN2008;
> +			write_32bit_cp1_register(CP1_STATUS, fcsr1);
> +			fcsr1 = read_32bit_cp1_register(CP1_STATUS);
> +
> +			write_32bit_cp1_register(CP1_STATUS, fcsr);
> +
> +			if (c->isa_level & (MIPS_CPU_ISA_M32R2 | MIPS_CPU_ISA_M64R2)) {
> +				/*
> +				 * The bit for MAC2008 might be reused by R6 in future,
> +				 * so we only test for R2-R5.
> +				 */

 Umm, this has formatting issues with lines extending beyond column #80.

  Maciej