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arch: arm: core: cortex_a_r: enable the VFP unit on boot for FPU_SHARING

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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>
This commit is contained in:
Ha Duong Quang 2024-10-09 10:32:12 +07:00 • committed by Dan Kalowsky
commit 6984237c06
1 changed files with 0 additions and 2 deletions
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arch/arm/core/cortex_a_r/prep_c.c
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@ -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 */