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[37.49.67.221]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-37ee0b9b186sm8907478f8f.91.2024.10.23.06.29.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Oct 2024 06:29:30 -0700 (PDT) From: Patrick Rudolph To: u-boot@lists.denx.de, linux-kernel@vger.kernel.org Cc: Patrick Rudolph , Simon Glass , Tom Rini Subject: [PATCH v10 32/37] arm: Implement read_mpidr on armv7 Date: Wed, 23 Oct 2024 15:20:15 +0200 Message-ID: <20241023132116.970117-33-patrick.rudolph@9elements.com> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241023132116.970117-1-patrick.rudolph@9elements.com> References: <20241023132116.970117-1-patrick.rudolph@9elements.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Implement read_mpidr() on armv7 to make use of it in generic code that compiles on both armv7 and armv8. Signed-off-by: Patrick Rudolph Reviewed-by: Simon Glass --- arch/arm/include/asm/system.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h index 2237d7d006..9eb30c2ade 100644 --- a/arch/arm/include/asm/system.h +++ b/arch/arm/include/asm/system.h @@ -394,6 +394,15 @@ void switch_to_hypervisor_ret(void); #define wfi() #endif +static inline unsigned long read_mpidr(void) +{ + unsigned long val; + + asm volatile("mrc p15, 0, %0, c0, c0, 5" : "=r" (val)); + + return val; +} + static inline unsigned long get_cpsr(void) { unsigned long cpsr; -- 2.46.2