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Differential D23718 Diff 70084 head/sys/arm64/arm64/pmap.c

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head/sys/arm64/arm64/pmap.c

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#define DMAP_TABLES ((DMAP_MAX_ADDRESS - DMAP_MIN_ADDRESS) >> L0_SHIFT) #define DMAP_TABLES ((DMAP_MAX_ADDRESS - DMAP_MIN_ADDRESS) >> L0_SHIFT)
extern pt_entry_t pagetable_dmap[]; extern pt_entry_t pagetable_dmap[];
#define PHYSMAP_SIZE (2 * (VM_PHYSSEG_MAX - 1)) #define PHYSMAP_SIZE (2 * (VM_PHYSSEG_MAX - 1))
static vm_paddr_t physmap[PHYSMAP_SIZE]; static vm_paddr_t physmap[PHYSMAP_SIZE];
static u_int physmap_idx; static u_int physmap_idx;
static SYSCTL_NODE(_vm, OID_AUTO, pmap, CTLFLAG_RD, 0, "VM/pmap parameters"); static SYSCTL_NODE(_vm, OID_AUTO, pmap, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
"VM/pmap parameters");
/* /*
* This ASID allocator uses a bit vector ("asid_set") to remember which ASIDs * This ASID allocator uses a bit vector ("asid_set") to remember which ASIDs
* that it has currently allocated to a pmap, a cursor ("asid_next") to * that it has currently allocated to a pmap, a cursor ("asid_next") to
* optimize its search for a free ASID in the bit vector, and an epoch number * optimize its search for a free ASID in the bit vector, and an epoch number
* ("asid_epoch") to indicate when it has reclaimed all previously allocated * ("asid_epoch") to indicate when it has reclaimed all previously allocated
* ASIDs that are not currently active on a processor. * ASIDs that are not currently active on a processor.
* *
* The current epoch number is always in the range [0, INT_MAX). Negative * The current epoch number is always in the range [0, INT_MAX). Negative
* numbers and INT_MAX are reserved for special cases that are described * numbers and INT_MAX are reserved for special cases that are described
* below. * below.
*/ */
struct asid_set { struct asid_set {
int asid_bits; int asid_bits;
bitstr_t *asid_set; bitstr_t *asid_set;
int asid_set_size; int asid_set_size;
int asid_next; int asid_next;
int asid_epoch; int asid_epoch;
struct mtx asid_set_mutex; struct mtx asid_set_mutex;
}; };
static struct asid_set asids; static struct asid_set asids;
static SYSCTL_NODE(_vm_pmap, OID_AUTO, asid, CTLFLAG_RD, 0, "ASID allocator"); static SYSCTL_NODE(_vm_pmap, OID_AUTO, asid, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
"ASID allocator");
SYSCTL_INT(_vm_pmap_asid, OID_AUTO, bits, CTLFLAG_RD, &asids.asid_bits, 0, SYSCTL_INT(_vm_pmap_asid, OID_AUTO, bits, CTLFLAG_RD, &asids.asid_bits, 0,
"The number of bits in an ASID"); "The number of bits in an ASID");
SYSCTL_INT(_vm_pmap_asid, OID_AUTO, next, CTLFLAG_RD, &asids.asid_next, 0, SYSCTL_INT(_vm_pmap_asid, OID_AUTO, next, CTLFLAG_RD, &asids.asid_next, 0,
"The last allocated ASID plus one"); "The last allocated ASID plus one");
SYSCTL_INT(_vm_pmap_asid, OID_AUTO, epoch, CTLFLAG_RD, &asids.asid_epoch, 0, SYSCTL_INT(_vm_pmap_asid, OID_AUTO, epoch, CTLFLAG_RD, &asids.asid_epoch, 0,
"The current epoch number"); "The current epoch number");
/* /*
▲ Show 20 Lines • Show All 721 Lines • ▼ Show 20 Linespmap_init(void)
pv_table = (struct md_page *)kmem_malloc(s, M_WAITOK | M_ZERO); pv_table = (struct md_page *)kmem_malloc(s, M_WAITOK | M_ZERO);
for (i = 0; i < pv_npg; i++) for (i = 0; i < pv_npg; i++)
TAILQ_INIT(&pv_table[i].pv_list); TAILQ_INIT(&pv_table[i].pv_list);
TAILQ_INIT(&pv_dummy.pv_list); TAILQ_INIT(&pv_dummy.pv_list);
vm_initialized = 1; vm_initialized = 1;
} }
static SYSCTL_NODE(_vm_pmap, OID_AUTO, l2, CTLFLAG_RD, 0, static SYSCTL_NODE(_vm_pmap, OID_AUTO, l2, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
"2MB page mapping counters"); "2MB page mapping counters");
static u_long pmap_l2_demotions; static u_long pmap_l2_demotions;
SYSCTL_ULONG(_vm_pmap_l2, OID_AUTO, demotions, CTLFLAG_RD, SYSCTL_ULONG(_vm_pmap_l2, OID_AUTO, demotions, CTLFLAG_RD,
&pmap_l2_demotions, 0, "2MB page demotions"); &pmap_l2_demotions, 0, "2MB page demotions");
static u_long pmap_l2_mappings; static u_long pmap_l2_mappings;
SYSCTL_ULONG(_vm_pmap_l2, OID_AUTO, mappings, CTLFLAG_RD, SYSCTL_ULONG(_vm_pmap_l2, OID_AUTO, mappings, CTLFLAG_RD,
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