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c71085f2c0
The initial implementation of this function goes through all the CPUs in a cluster to determine if the current CPU is the only one running. This process occurs every time the function is called. However, during boot, we already perform this task, so let's take advantage of this opportunity to create and fill a CPU bitmask that can be easily and efficiently used later. This patch modifies the function to allow providing the first available online CPU when one already exists, which is necessary for delay CPU calibration optimization. Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
63 lines
1.3 KiB
C
63 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright (C) 2013 Imagination Technologies
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* Author: Paul Burton <paul.burton@mips.com>
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*/
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#ifndef __MIPS_ASM_SMP_CPS_H__
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#define __MIPS_ASM_SMP_CPS_H__
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#define CPS_ENTRY_PATCH_INSNS 6
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#ifndef __ASSEMBLY__
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struct vpe_boot_config {
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unsigned long pc;
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unsigned long sp;
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unsigned long gp;
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};
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struct core_boot_config {
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atomic_t vpe_mask;
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struct vpe_boot_config *vpe_config;
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};
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struct cluster_boot_config {
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unsigned long *core_power;
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struct cpumask cpumask;
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struct core_boot_config *core_config;
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};
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extern struct cluster_boot_config *mips_cps_cluster_bootcfg;
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extern void mips_cps_core_boot(int cca, void __iomem *gcr_base);
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extern void mips_cps_core_init(void);
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extern void mips_cps_boot_vpes(struct core_boot_config *cfg, unsigned vpe);
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extern void mips_cps_pm_save(void);
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extern void mips_cps_pm_restore(void);
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extern void excep_tlbfill(void);
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extern void excep_xtlbfill(void);
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extern void excep_cache(void);
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extern void excep_genex(void);
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extern void excep_intex(void);
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extern void excep_ejtag(void);
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#ifdef CONFIG_MIPS_CPS
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extern bool mips_cps_smp_in_use(void);
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#else /* !CONFIG_MIPS_CPS */
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static inline bool mips_cps_smp_in_use(void) { return false; }
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#endif /* !CONFIG_MIPS_CPS */
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#else /* __ASSEMBLY__ */
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.extern mips_cps_bootcfg;
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#endif /* __ASSEMBLY__ */
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#endif /* __MIPS_ASM_SMP_CPS_H__ */
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