At present fdt_read_prop() can only handle 1 or 2 cells. It is
called by fdt_read_range() which may be used to read PCI address
from <ranges> for a PCI bus node where the number of PCI address
cell is 3.
This adds the special handling of such case.
Signed-off-by: Bin Meng <bmeng...@gmail.com>
---
common/fdt_support.c | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
diff --git a/common/fdt_support.c b/common/fdt_support.c
index 638eca9..b3aa865 100644
--- a/common/fdt_support.c
+++ b/common/fdt_support.c
@@ -1602,22 +1602,31 @@ u64 fdt_get_base_address(const void *fdt, int node)
}
/*
- * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
+ * Read a property of size <prop_len>. Currently only supports 1 or 2 cells,
+ * or 3 cells specially for a PCI address.
*/
static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off,
uint64_t *val, int cells)
{
- const fdt32_t *prop32 = &prop[cell_off];
- const unaligned_fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off];
+ const fdt32_t *prop32;
+ const unaligned_fdt64_t *prop64;
if ((cell_off + cells) > prop_len)
return -FDT_ERR_NOSPACE;
+ prop32 = &prop[cell_off];
+
+ /* Special handling for PCI address in PCI bus <ranges> */
+ if (cells == 3)
+ cell_off += 1;
+ prop64 = (const fdt64_t *)&prop[cell_off];
+
switch (cells) {
case 1:
*val = fdt32_to_cpu(*prop32);
break;
case 2:
+ case 3:
*val = fdt64_to_cpu(*prop64);
break;
default:
--
2.7.4
