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mirror of https://git.FreeBSD.org/src.git synced 2024-12-22 11:17:19 +00:00

Add support for moving the DMAP range. This is needed as some AMD SoCs

place physical memory at an address outside the old DMAP range. This is an
issue as we rely on being able to move from PA -> VA using this range.

Obtained from:	Patrick Wildt <patrick@bitrig.org> (earlier version)
Sponsored by:	ABT Systems Ltd
Differential Revision:	https://reviews.freebsd.org/D3885
This commit is contained in:
Andrew Turner 2015-11-24 11:01:43 +00:00
parent 547831b6fd
commit ac4dad9e2f
Notes: svn2git 2020-12-20 02:59:44 +00:00
svn path=/head/; revision=291246
2 changed files with 30 additions and 9 deletions

View File

@ -215,6 +215,8 @@ struct msgbuf *msgbufp = NULL;
static struct rwlock_padalign pvh_global_lock;
vm_paddr_t dmap_phys_base; /* The start of the dmap region */
/*
* Data for the pv entry allocation mechanism
*/
@ -446,18 +448,19 @@ pmap_early_vtophys(vm_offset_t l1pt, vm_offset_t va)
}
static void
pmap_bootstrap_dmap(vm_offset_t l1pt)
pmap_bootstrap_dmap(vm_offset_t l1pt, vm_paddr_t kernstart)
{
vm_offset_t va;
vm_paddr_t pa;
pd_entry_t *l1;
u_int l1_slot;
pa = dmap_phys_base = kernstart & ~L1_OFFSET;
va = DMAP_MIN_ADDRESS;
l1 = (pd_entry_t *)l1pt;
l1_slot = pmap_l1_index(DMAP_MIN_ADDRESS);
for (pa = 0; va < DMAP_MAX_ADDRESS;
for (; va < DMAP_MAX_ADDRESS;
pa += L1_SIZE, va += L1_SIZE, l1_slot++) {
KASSERT(l1_slot < Ln_ENTRIES, ("Invalid L1 index"));
@ -548,7 +551,8 @@ pmap_bootstrap(vm_offset_t l1pt, vm_paddr_t kernstart, vm_size_t kernlen)
pt_entry_t *l2;
vm_offset_t va, freemempos;
vm_offset_t dpcpu, msgbufpv;
vm_paddr_t pa;
vm_paddr_t pa, min_pa;
int i;
kern_delta = KERNBASE - kernstart;
physmem = 0;
@ -566,8 +570,23 @@ pmap_bootstrap(vm_offset_t l1pt, vm_paddr_t kernstart, vm_size_t kernlen)
*/
rw_init(&pvh_global_lock, "pmap pv global");
/* Assume the address we were loaded to is a valid physical address */
min_pa = KERNBASE - kern_delta;
/*
* Find the minimum physical address. physmap is sorted,
* but may contain empty ranges.
*/
for (i = 0; i < (physmap_idx * 2); i += 2) {
if (physmap[i] == physmap[i + 1])
continue;
if (physmap[i] <= min_pa)
min_pa = physmap[i];
break;
}
/* Create a direct map region early so we can use it for pa -> va */
pmap_bootstrap_dmap(l1pt);
pmap_bootstrap_dmap(l1pt, min_pa);
va = KERNBASE;
pa = KERNBASE - kern_delta;

View File

@ -160,11 +160,13 @@
#define DMAP_MIN_ADDRESS (0xffffffc000000000UL)
#define DMAP_MAX_ADDRESS (0xffffffdfffffffffUL)
#define DMAP_MIN_PHYSADDR (0x0000000000000000UL)
#define DMAP_MAX_PHYSADDR (DMAP_MAX_ADDRESS - DMAP_MIN_ADDRESS)
extern vm_paddr_t dmap_phys_base;
#define DMAP_MIN_PHYSADDR (dmap_phys_base)
#define DMAP_MAX_PHYSADDR (dmap_phys_base + (DMAP_MAX_ADDRESS - DMAP_MIN_ADDRESS))
/* True if pa is in the dmap range */
#define PHYS_IN_DMAP(pa) ((pa) <= DMAP_MAX_PHYSADDR)
#define PHYS_IN_DMAP(pa) ((pa) >= DMAP_MIN_PHYSADDR && \
(pa) <= DMAP_MAX_PHYSADDR)
/* True if va is in the dmap range */
#define VIRT_IN_DMAP(va) ((va) >= DMAP_MIN_ADDRESS && \
(va) <= DMAP_MAX_ADDRESS)
@ -174,7 +176,7 @@
KASSERT(PHYS_IN_DMAP(pa), \
("%s: PA out of range, PA: 0x%lx", __func__, \
(vm_paddr_t)(pa))); \
(pa) | DMAP_MIN_ADDRESS; \
((pa) - dmap_phys_base) | DMAP_MIN_ADDRESS; \
})
#define DMAP_TO_PHYS(va) \
@ -182,7 +184,7 @@
KASSERT(VIRT_IN_DMAP(va), \
("%s: VA out of range, VA: 0x%lx", __func__, \
(vm_offset_t)(va))); \
(va) & ~DMAP_MIN_ADDRESS; \
((va) & ~DMAP_MIN_ADDRESS) + dmap_phys_base; \
})
#define VM_MIN_USER_ADDRESS (0x0000000000000000UL)