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Add fdt_get_reserved_regions function. API is simmilar to fdt_get_mem_regions

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It returns memory regions restricted from being used by kernel. These
regions are dfined in "memreserve" property of root node in the same
format as "reg" property of /memory node
This commit is contained in:
Oleksandr Tymoshenko 2012-11-30 03:08:49 +00:00
parent 33aad34de6
commit 1d1ffd9efb
2 changed files with 61 additions and 0 deletions
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60
sys/dev/fdt/fdt_common.c
View File

@ -633,6 +633,66 @@ fdt_get_phyaddr(phandle_t node, device_t dev, int *phy_addr, void **phy_sc)
return (0);
}
int
fdt_get_reserved_regions(struct mem_region *mr, int *mrcnt)
{
pcell_t reserve[FDT_REG_CELLS * FDT_MEM_REGIONS];
pcell_t *reservep;
phandle_t memory, root;
uint32_t memory_size;
int addr_cells, size_cells;
int i, max_size, res_len, rv, tuple_size, tuples;
max_size = sizeof(reserve);
root = OF_finddevice("/");
memory = OF_finddevice("/memory");
if (memory == -1) {
rv = ENXIO;
goto out;
}
if ((rv = fdt_addrsize_cells(OF_parent(memory), &addr_cells,
&size_cells)) != 0)
goto out;
if (addr_cells > 2) {
rv = ERANGE;
goto out;
}
tuple_size = sizeof(pcell_t) * (addr_cells + size_cells);
res_len = OF_getproplen(root, "memreserve");
if (res_len <= 0 || res_len > sizeof(reserve)) {
rv = ERANGE;
goto out;
}
if (OF_getprop(root, "memreserve", reserve, res_len) <= 0) {
rv = ENXIO;
goto out;
}
memory_size = 0;
tuples = res_len / tuple_size;
reservep = (pcell_t *)&reserve;
for (i = 0; i < tuples; i++) {
rv = fdt_data_to_res(reservep, addr_cells, size_cells,
(u_long *)&mr[i].mr_start, (u_long *)&mr[i].mr_size);
if (rv != 0)
goto out;
reservep += addr_cells + size_cells;
}
*mrcnt = i;
rv = 0;
out:
return (rv);
}
int
fdt_get_mem_regions(struct mem_region *mr, int *mrcnt, uint32_t *memsize)
{

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

@ -90,6 +90,7 @@ int fdt_data_to_res(pcell_t *, int, int, u_long *, u_long *);
int fdt_data_verify(void *, int);
phandle_t fdt_find_compatible(phandle_t, const char *, int);
int fdt_get_mem_regions(struct mem_region *, int *, uint32_t *);
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 *);
int fdt_immr_addr(vm_offset_t);