Differential D52357 Diff 161525 sys/arm64/arm64/pmap.c

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sys/arm64/arm64/pmap.c

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Show First 20 Lines • Show All 1,689 Lines • ▼ Show 20 Lines	if (CPU_REV(PCPU_GET(midr)) < 3) {
*errata_count = 1;		*errata_count = 1;
return (true);		return (true);
}		}
}		}

return (false);		return (false);
}		}

static void		static bool
pmap_dbm_enable(const struct cpu_feat *feat __unused,		pmap_dbm_enable(const struct cpu_feat *feat __unused,
cpu_feat_errata errata_status, u_int *errata_list __unused,		cpu_feat_errata errata_status, u_int *errata_list __unused,
u_int errata_count)		u_int errata_count)
{		{
uint64_t tcr;		uint64_t tcr;

/* Skip if there is an erratum affecting DBM */		/* Skip if there is an erratum affecting DBM */
if (errata_status != ERRATA_NONE)		if (errata_status != ERRATA_NONE)
return;		return (false);

tcr = READ_SPECIALREG(tcr_el1) \| TCR_HD;		tcr = READ_SPECIALREG(tcr_el1) \| TCR_HD;
WRITE_SPECIALREG(tcr_el1, tcr);		WRITE_SPECIALREG(tcr_el1, tcr);
isb();		isb();
/* Flush the local TLB for the TCR_HD flag change */		/* Flush the local TLB for the TCR_HD flag change */
dsb(nshst);		dsb(nshst);
__asm __volatile("tlbi vmalle1");		__asm __volatile("tlbi vmalle1");
dsb(nsh);		dsb(nsh);
isb();		isb();

		return (true);
}		}

CPU_FEAT(feat_hafdbs,		CPU_FEAT(feat_hafdbs, "Hardware management of the Access flag and dirty state",
pmap_dbm_check, pmap_dbm_has_errata, pmap_dbm_enable,		pmap_dbm_check, pmap_dbm_has_errata, pmap_dbm_enable,
CPU_FEAT_AFTER_DEV \| CPU_FEAT_PER_CPU);		CPU_FEAT_AFTER_DEV \| CPU_FEAT_PER_CPU);

/*		/*
* Initialize the pmap module.		* Initialize the pmap module.
*		*
* Called by vm_mem_init(), to initialize any structures that the pmap		* Called by vm_mem_init(), to initialize any structures that the pmap
* system needs to map virtual memory.		* system needs to map virtual memory.
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