From ef4025cf61f0bd002d5e5be912b6606cbe48e66c Mon Sep 17 00:00:00 2001 From: Poonam Aggrwal Date: Wed, 2 Sep 2009 19:40:36 +0530 Subject: [PATCH] ppc/85xx/86xx: Device tree fixup for number of cores Fixing the number of cores in the device tree based on the actual number of cores on the system. With this same device tree image can be used for dual core and single core members of otherwise exactly same SOC. For example: * P2020RDB and P2010RDB * P1020RDB and P1011RDB * MPC8641D and MPC8641 Signed-off-by: Poonam Aggrwal Signed-off-by: Kumar Gala --- cpu/mpc85xx/fdt.c | 2 ++ cpu/mpc86xx/fdt.c | 3 +++ cpu/mpc8xxx/Makefile | 1 + cpu/mpc8xxx/fdt.c | 55 ++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 61 insertions(+) create mode 100644 cpu/mpc8xxx/fdt.c diff --git a/cpu/mpc85xx/fdt.c b/cpu/mpc85xx/fdt.c index 8366379ab6..723f473dab 100644 --- a/cpu/mpc85xx/fdt.c +++ b/cpu/mpc85xx/fdt.c @@ -34,6 +34,7 @@ DECLARE_GLOBAL_DATA_PTR; extern void ft_qe_setup(void *blob); +extern void ft_fixup_num_cores(void *blob); #ifdef CONFIG_MP #include "mp.h" @@ -327,6 +328,7 @@ void ft_cpu_setup(void *blob, bd_t *bd) #ifdef CONFIG_MP ft_fixup_cpu(blob, (u64)bd->bi_memstart + (u64)bd->bi_memsize); #endif + ft_fixup_num_cores(blob); ft_fixup_cache(blob); diff --git a/cpu/mpc86xx/fdt.c b/cpu/mpc86xx/fdt.c index a36ee30c3f..51f3f4c220 100644 --- a/cpu/mpc86xx/fdt.c +++ b/cpu/mpc86xx/fdt.c @@ -13,6 +13,8 @@ DECLARE_GLOBAL_DATA_PTR; +extern void ft_fixup_num_cores(void *blob); + void ft_cpu_setup(void *blob, bd_t *bd) { #ifdef CONFIG_MP @@ -54,4 +56,5 @@ void ft_cpu_setup(void *blob, bd_t *bd) if (off < 0) printf("%s: %s\n", __FUNCTION__, fdt_strerror(off)); #endif + ft_fixup_num_cores(blob); } diff --git a/cpu/mpc8xxx/Makefile b/cpu/mpc8xxx/Makefile index 5cb6814403..481f9e541d 100644 --- a/cpu/mpc8xxx/Makefile +++ b/cpu/mpc8xxx/Makefile @@ -11,6 +11,7 @@ include $(TOPDIR)/config.mk LIB = $(obj)lib8xxx.a COBJS-y += cpu.o +COBJS-$(CONFIG_OF_LIBFDT) += fdt.o COBJS-$(CONFIG_PCI) += pci_cfg.o SRCS := $(START:.o=.S) $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c) diff --git a/cpu/mpc8xxx/fdt.c b/cpu/mpc8xxx/fdt.c new file mode 100644 index 0000000000..3a9b5841b6 --- /dev/null +++ b/cpu/mpc8xxx/fdt.c @@ -0,0 +1,55 @@ +/* + * Copyright 2009 Freescale Semiconductor, Inc. + * + * This file is derived from cpu/mpc85xx/cpu.c and cpu/mpc86xx/cpu.c. + * Basically this file contains cpu specific common code for 85xx/86xx + * processors. + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include +#include +#include + +void ft_fixup_num_cores(void *blob) { + int off, num_cores, del_cores; + + del_cores = 0; + num_cores = cpu_numcores(); + + off = fdt_node_offset_by_prop_value(blob, -1, "device_type", "cpu", 4); + while (off != -FDT_ERR_NOTFOUND) { + u32 *reg = (u32 *)fdt_getprop(blob, off, "reg", 0); + + /* if we find a cpu node outside of what we expect delete it + * and reset the offset back to the start since we can't + * trust the offsets anymore + */ + if (*reg > num_cores-1) { + fdt_del_node(blob, off); + del_cores++; + off = -1; + } + off = fdt_node_offset_by_prop_value(blob, off, + "device_type", "cpu", 4); + } + debug ("%x core system found\n", num_cores); + debug ("deleted %d extra core entry entries from device tree\n", + del_cores); +} -- 2.39.5