Re: [U-Boot] [PATCH 02/11] lib: fdtdec: fix size cell and address cell parse from DT

+Stephen

Hi Mugunthan,

On 7 April 2016 at 09:17, Mugunthan V N mugunthanvnm@ti.com wrote:

Size cell and address cell should be read from the parent node and should not assume with data structures as an example TI DRA7xx SoC is enabled as 64bit as there is LPAE support but the addresses specified in DT are all 32 bit sizes. So changing the code to read from parent node instead of calculations.

I don't understand this. Can you please reword it and shorten the sentences?

Signed-off-by: Mugunthan V N mugunthanvnm@ti.com

lib/fdtdec.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/lib/fdtdec.c b/lib/fdtdec.c index 70acc29..8a5fb8c 100644 --- a/lib/fdtdec.c +++ b/lib/fdtdec.c @@ -88,15 +88,20 @@ fdt_addr_t fdtdec_get_addr_size_fixed(const void *blob, int node, const fdt32_t *prop_addr, *prop_size, *prop_after_size; int len; fdt_addr_t addr;

•   int parent;
  
    debug("%s: %s: ", __func__, prop_name);
  
  

•   if (na > (sizeof(fdt_addr_t) / sizeof(fdt32_t))) {
  

•   parent = fdt_parent_offset(blob, node);
  

This is a very slow function. I hope this changes is not needed.

•   na = fdt_address_cells(blob, parent);
  

•   if (na < 1) {
            debug("(na too large for fdt_addr_t type)\n");
            return FDT_ADDR_T_NONE;
    }
  
  

•   if (ns > (sizeof(fdt_size_t) / sizeof(fdt32_t))) {
  

•   ns = fdt_size_cells(blob, parent);
  

•   if (ns < 0) {
            debug("(ns too large for fdt_size_t type)\n");
            return FDT_ADDR_T_NONE;
    }
  

-- 2.8.1.101.g72d917a

Regards, Simon