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Allow us to read the physmap data into our own array and use this to build

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the DMAP region on arm64.

We already have the needed information to build these tables, we just need
to extract it. This significantly simplifies the code.

Obtained from:	ABT Systems Ltd
Sponsored by:	Turing Robotic Industries
This commit is contained in:
Andrew Turner 2018-05-24 15:32:49 +00:00
parent bb8f162363
commit 9f1a80706c
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=334162
4 changed files with 17 additions and 92 deletions
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7
sys/arm/arm/physmem.c
View File

@ -375,6 +375,13 @@ void arm_physmem_exclude_region(vm_paddr_t pa, vm_size_t sz, uint32_t exflags)
excnt = insert_region(exregions, excnt, pa, sz, exflags);
}
size_t
arm_physmem_avail(vm_paddr_t *avail, size_t maxavail)
{
return (regions_to_avail(avail, EXFLAG_NOALLOC, maxavail, NULL, NULL));
}
/*
* Process all the regions added earlier into the global avail lists.
*

1
sys/arm/include/physmem.h
View File

@ -56,6 +56,7 @@ extern vm_paddr_t arm_physmem_kernaddr;
void arm_physmem_hardware_region(uint64_t pa, uint64_t sz);
void arm_physmem_exclude_region(vm_paddr_t pa, vm_size_t sz, uint32_t flags);
size_t arm_physmem_avail(vm_paddr_t *avail, size_t maxavail);
void arm_physmem_init_kernel_globals(void);
void arm_physmem_print_tables(void);

94
sys/arm64/arm64/machdep.c
View File

@ -106,10 +106,6 @@ static struct trapframe proc0_tf;
int early_boot = 1;
int cold = 1;
#define PHYSMAP_SIZE (2 * (VM_PHYSSEG_MAX - 1))
vm_paddr_t physmap[PHYSMAP_SIZE];
u_int physmap_idx;
struct kva_md_info kmi;
int64_t dcache_line_size; /* The minimum D cache line size */
@ -724,88 +720,8 @@ typedef struct {
uint64_t attr;
} EFI_MEMORY_DESCRIPTOR;
static int
add_physmap_entry(uint64_t base, uint64_t length, vm_paddr_t *physmap,
u_int *physmap_idxp)
{
u_int i, insert_idx, _physmap_idx;
_physmap_idx = *physmap_idxp;
if (length == 0)
return (1);
/*
* Find insertion point while checking for overlap. Start off by
* assuming the new entry will be added to the end.
*/
insert_idx = _physmap_idx;
for (i = 0; i <= _physmap_idx; i += 2) {
if (base < physmap[i + 1]) {
if (base + length <= physmap[i]) {
insert_idx = i;
break;
}
if (boothowto & RB_VERBOSE)
printf(
"Overlapping memory regions, ignoring second region\n");
return (1);
}
}
/* See if we can prepend to the next entry. */
if (insert_idx <= _physmap_idx &&
base + length == physmap[insert_idx]) {
physmap[insert_idx] = base;
return (1);
}
/* See if we can append to the previous entry. */
if (insert_idx > 0 && base == physmap[insert_idx - 1]) {
physmap[insert_idx - 1] += length;
return (1);
}
_physmap_idx += 2;
*physmap_idxp = _physmap_idx;
if (_physmap_idx == PHYSMAP_SIZE) {
printf(
"Too many segments in the physical address map, giving up\n");
return (0);
}
/*
* Move the last 'N' entries down to make room for the new
* entry if needed.
*/
for (i = _physmap_idx; i > insert_idx; i -= 2) {
physmap[i] = physmap[i - 2];
physmap[i + 1] = physmap[i - 1];
}
/* Insert the new entry. */
physmap[insert_idx] = base;
physmap[insert_idx + 1] = base + length;
return (1);
}
#ifdef FDT
static void
add_fdt_mem_regions(struct mem_region *mr, int mrcnt, vm_paddr_t *physmap,
u_int *physmap_idxp)
{
for (int i = 0; i < mrcnt; i++) {
if (!add_physmap_entry(mr[i].mr_start, mr[i].mr_size, physmap,
physmap_idxp))
break;
}
}
#endif
static void
add_efi_map_entries(struct efi_map_header *efihdr, vm_paddr_t *physmap,
u_int *physmap_idxp)
add_efi_map_entries(struct efi_map_header *efihdr)
{
struct efi_md *map, *p;
const char *type;
@ -897,9 +813,6 @@ add_efi_map_entries(struct efi_map_header *efihdr, vm_paddr_t *physmap,
arm_physmem_hardware_region(p->md_phys,
p->md_pages * PAGE_SIZE);
if (!add_physmap_entry(p->md_phys, (p->md_pages * PAGE_SIZE),
physmap, physmap_idxp))
break;
}
}
@ -1048,19 +961,16 @@ initarm(struct arm64_bootparams *abp)
lastaddr = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t);
/* Load the physical memory ranges */
physmap_idx = 0;
efihdr = (struct efi_map_header *)preload_search_info(kmdp,
MODINFO_METADATA | MODINFOMD_EFI_MAP);
if (efihdr != NULL)
add_efi_map_entries(efihdr, physmap, &physmap_idx);
add_efi_map_entries(efihdr);
#ifdef FDT
else {
/* Grab physical memory regions information from device tree. */
if (fdt_get_mem_regions(mem_regions, &mem_regions_sz,
NULL) != 0)
panic("Cannot get physical memory regions");
add_fdt_mem_regions(mem_regions, mem_regions_sz, physmap,
&physmap_idx);
arm_physmem_hardware_regions(mem_regions, mem_regions_sz);
}
if (fdt_get_reserved_mem(mem_regions, &mem_regions_sz) == 0)

7
sys/arm64/arm64/pmap.c
View File

@ -259,6 +259,10 @@ CTASSERT((DMAP_MAX_ADDRESS & ~L0_OFFSET) == DMAP_MAX_ADDRESS);
#define DMAP_TABLES ((DMAP_MAX_ADDRESS - DMAP_MIN_ADDRESS) >> L0_SHIFT)
extern pt_entry_t pagetable_dmap[];
#define PHYSMAP_SIZE (2 * (VM_PHYSSEG_MAX - 1))
static vm_paddr_t physmap[PHYSMAP_SIZE];
static u_int physmap_idx;
static SYSCTL_NODE(_vm, OID_AUTO, pmap, CTLFLAG_RD, 0, "VM/pmap parameters");
static int superpages_enabled = 1;
@ -709,6 +713,9 @@ pmap_bootstrap(vm_offset_t l0pt, vm_offset_t l1pt, vm_paddr_t kernstart,
/* Assume the address we were loaded to is a valid physical address */
min_pa = max_pa = KERNBASE - kern_delta;
physmap_idx = arm_physmem_avail(physmap, nitems(physmap));
physmap_idx /= 2;
/*
* Find the minimum physical address. physmap is sorted,
* but may contain empty ranges.