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Handle reserved memory with the no-map property.

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We shouldn't be mapping this memory, so we need to find it so it
can be excluded from the phys_avail map.

Reviewed by:	manu
Obtained from:	ABT Systems Ltd
Sponsored by:	Turing Robotic Industries
Differential Revision:	https://reviews.freebsd.org/D15518
This commit is contained in:
Andrew Turner 2018-05-22 16:03:41 +00:00
parent 9f78e2b83d
commit 1442afc1c7
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=334056
2 changed files with 42 additions and 0 deletions
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41
sys/dev/fdt/fdt_common.c
View File

@ -499,6 +499,47 @@ fdt_get_reserved_regions(struct mem_region *mr, int *mrcnt)
return (rv);
}
int
fdt_get_reserved_mem(struct mem_region *reserved, int *mreserved)
{
pcell_t reg[FDT_REG_CELLS];
phandle_t child, root;
int addr_cells, size_cells;
int i, rv;
root = OF_finddevice("/reserved-memory");
if (root == -1) {
return (ENXIO);
}
if ((rv = fdt_addrsize_cells(root, &addr_cells, &size_cells)) != 0)
return (rv);
if (addr_cells + size_cells > FDT_REG_CELLS)
panic("Too many address and size cells %d %d", addr_cells,
size_cells);
i = 0;
for (child = OF_child(root); child != 0; child = OF_peer(child)) {
if (!OF_hasprop(child, "no-map"))
continue;
rv = OF_getprop(child, "reg", reg, sizeof(reg));
if (rv <= 0)
/* XXX: Does a no-map of a dynamic range make sense? */
continue;
fdt_data_to_res(reg, addr_cells, size_cells,
(u_long *)&reserved[i].mr_start,
(u_long *)&reserved[i].mr_size);
i++;
}
*mreserved = i;
return (0);
}
int
fdt_get_mem_regions(struct mem_region *mr, int *mrcnt, uint64_t *memsize)
{

1
sys/dev/fdt/fdt_common.h
View File

@ -85,6 +85,7 @@ int fdt_data_to_res(pcell_t *, int, int, u_long *, u_long *);
phandle_t fdt_find_compatible(phandle_t, const char *, int);
phandle_t fdt_depth_search_compatible(phandle_t, const char *, int);
int fdt_get_mem_regions(struct mem_region *, int *, uint64_t *);
int fdt_get_reserved_mem(struct mem_region *, int *);
int fdt_get_reserved_regions(struct mem_region *, int *);
int fdt_get_phyaddr(phandle_t, device_t, int *, void **);
int fdt_get_range(phandle_t, int, u_long *, u_long *);