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| author | Tom Rini <trini@konsulko.com> | 2021-03-15 12:15:38 -0400 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2021-03-15 12:15:38 -0400 |
| commit | 22fc991dafee0142fc6bf621e7bd558bd58020b4 (patch) | |
| tree | e5da8826fd735de968519f432864dc1545d96017 /common/fdt_support.c | |
| parent | 1876b390f31afca15de334e499aa071b0bf64a44 (diff) | |
| parent | 4103e13534141c31e4e9bf40848ab3a61dabce81 (diff) | |
Merge tag 'v2021.04-rc4' into next
Prepare v2021.04-rc4
Diffstat (limited to 'common/fdt_support.c')
| -rw-r--r-- | common/fdt_support.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/common/fdt_support.c b/common/fdt_support.c index 08d540bfc8..e624bbdf40 100644 --- a/common/fdt_support.c +++ b/common/fdt_support.c @@ -1668,22 +1668,36 @@ 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> + * + * PCI child address is made up of 3 cells. Advance the cell offset + * by 1 so that the PCI child address can be correctly read. + */ + 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: |