arch: arm: core: cortex_a_r: enable the VFP unit on boot for FPU_SHARING (6984237c) · Commits · Wenxi XU / zephyr

The FPU is already disabled by the z_arm_svc function when the first thread starts. Therefore, disabling the FPU at boot is unnecessary for lazy FPU; instead, it must be enabled to handle floating-point instructions before the lazy FPU works. Signed-off-by:

Ha Duong Quang <ha.duongquang@nxp.com>

arch/arm/core/cortex_a_r/prep_c.c

+0 −2

Original line number	Diff line number	Diff line
		@@ -62,7 +62,6 @@ static inline void z_arm_floating_point_init(void)
		__set_CPACR(reg_val);
		barrier_isync_fence_full();

		#if !defined(CONFIG_FPU_SHARING)
		/*
		* FPEXC: Floating-Point Exception Control register
		* comp. ARM Architecture Reference Manual, ARMv7-A and ARMv7-R edition,
		@@ -84,7 +83,6 @@ static inline void z_arm_floating_point_init(void)
		*/
		__set_FPEXC(FPEXC_EN);
		#endif
		#endif
		}

		#endif /* CONFIG_CPU_HAS_FPU */

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