The pointer of device tree comes from r3 for QEMU. This is not the case for normal SoCs out of reset. Having gd->fdt_blob as 0 is important for other functions to detect the non-existence of device tree.
Signed-off-by: York Sun yorksun@freescale.com CC: Alexander Graf agraf@suse.de --- arch/powerpc/cpu/mpc85xx/cpu_init_early.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/arch/powerpc/cpu/mpc85xx/cpu_init_early.c b/arch/powerpc/cpu/mpc85xx/cpu_init_early.c index 998781b..47b712d 100644 --- a/arch/powerpc/cpu/mpc85xx/cpu_init_early.c +++ b/arch/powerpc/cpu/mpc85xx/cpu_init_early.c @@ -102,11 +102,13 @@ void cpu_init_early_f(void *fdt) for (i = 0; i < sizeof(gd_t); i++) ((char *)gd)[i] = 0;
+#ifdef CONFIG_QEMU_E500 /* * CONFIG_SYS_CCSRBAR_PHYS below may use gd->fdt_blob on ePAPR systems, * so we need to populate it before it accesses it. */ gd->fdt_blob = fdt; +#endif
mas0 = MAS0_TLBSEL(1) | MAS0_ESEL(13); mas1 = MAS1_VALID | MAS1_TID(0) | MAS1_TS | MAS1_TSIZE(BOOKE_PAGESZ_1M);