This is a skeleton implementation which always reports the size of memory as 64 MB.
Signed-off-by: Gabe Black: gabeblack@chromium.org --- arch/x86/cpu/coreboot/Makefile | 55 ++++++++++++++++++++++++++++++++++ arch/x86/cpu/coreboot/asm-offsets.c | 25 +++++++++++++++ arch/x86/cpu/coreboot/coreboot_car.S | 29 ++++++++++++++++++ arch/x86/cpu/coreboot/sdram.c | 39 ++++++++++++++++++++++++ 4 files changed, 148 insertions(+), 0 deletions(-) create mode 100644 arch/x86/cpu/coreboot/Makefile create mode 100644 arch/x86/cpu/coreboot/asm-offsets.c create mode 100644 arch/x86/cpu/coreboot/coreboot_car.S create mode 100644 arch/x86/cpu/coreboot/sdram.c
diff --git a/arch/x86/cpu/coreboot/Makefile b/arch/x86/cpu/coreboot/Makefile new file mode 100644 index 0000000..0444399 --- /dev/null +++ b/arch/x86/cpu/coreboot/Makefile @@ -0,0 +1,55 @@ +# +# Copyright (c) 2011 The Chromium OS Authors. +# +# (C) Copyright 2008 +# Graeme Russ, graeme.russ@gmail.com. +# +# (C) Copyright 2006 +# Wolfgang Denk, DENX Software Engineering, wd@denx.de. +# +# (C) Copyright 2002 +# Daniel Engström, Omicron Ceti AB, daniel@omicron.se. +# +# 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 $(TOPDIR)/config.mk + +LIB := $(obj)lib$(SOC).o + +COBJS-$(CONFIG_SYS_COREBOOT) += sdram.o + +SOBJS-$(CONFIG_SYS_COREBOOT) += coreboot_car.o + +SRCS := $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c) +OBJS := $(addprefix $(obj),$(SOBJS-y) $(COBJS-y)) + +all: $(obj).depend $(LIB) + +$(LIB): $(OBJS) + $(call cmd_link_o_target, $(OBJS)) + +######################################################################### + +# defines $(obj).depend target +include $(SRCTREE)/rules.mk + +sinclude $(obj).depend + +######################################################################### diff --git a/arch/x86/cpu/coreboot/asm-offsets.c b/arch/x86/cpu/coreboot/asm-offsets.c new file mode 100644 index 0000000..97937da --- /dev/null +++ b/arch/x86/cpu/coreboot/asm-offsets.c @@ -0,0 +1,25 @@ +/* + * Adapted from Linux v2.6.36 kernel: arch/powerpc/kernel/asm-offsets.c + * + * This program is used to generate definitions needed by + * assembly language modules. + * + * We use the technique used in the OSF Mach kernel code: + * generate asm statements containing #defines, + * compile this file to assembler, and then extract the + * #defines from the assembly-language output. + * + * 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. + */ + +#include <common.h> +#include <linux/kbuild.h> + +int main(void) +{ + DEFINE(GENERATED_GD_RELOC_OFF, offsetof(gd_t, reloc_off)); + return 0; +} diff --git a/arch/x86/cpu/coreboot/coreboot_car.S b/arch/x86/cpu/coreboot/coreboot_car.S new file mode 100644 index 0000000..3cc2575 --- /dev/null +++ b/arch/x86/cpu/coreboot/coreboot_car.S @@ -0,0 +1,29 @@ +/* + * Copyright (c) 2011 The Chromium OS Authors. + * (C) Copyright 2010-2011 + * Graeme Russ, graeme.russ@gmail.com + * + * 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 + */ + +.section .text + +.globl car_init +car_init: + jmp car_init_ret diff --git a/arch/x86/cpu/coreboot/sdram.c b/arch/x86/cpu/coreboot/sdram.c new file mode 100644 index 0000000..b56085a --- /dev/null +++ b/arch/x86/cpu/coreboot/sdram.c @@ -0,0 +1,39 @@ +/* + * Copyright (c) 2011 The Chromium OS Authors. + * (C) Copyright 2010,2011 + * Graeme Russ, graeme.russ@gmail.com + * + * 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 <common.h> +#include <asm/u-boot-x86.h> + +DECLARE_GLOBAL_DATA_PTR; + +int dram_init_f(void) +{ + gd->ram_size = 64*1024*1024; + return 0; +} + +int dram_init(void) +{ + return 0; +}