Stefan Reinauer (stefan.reinauer@coreboot.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/2118
-gerrit
commit 9ae4509487f951abe921b5647ffa1fa953bf6617 Author: Stefan Reinauer stefan.reinauer@coreboot.org Date: Wed Jan 9 02:25:43 2013 +0100
ARM bootblock approach (incomplete)
Do not attempt to commit, just making this available so it doesn't get lost
Change-Id: I9cc2a8191d2db38b27b6363ba673e5a360de9684 Signed-off-by: Stefan Reinauer reinauer@google.com --- src/arch/armv7/Makefile.inc | 23 +++++------ src/arch/armv7/bootblock.inc | 82 +++++++++++++++++++++++++++++++++++++++ src/arch/armv7/bootblock.lds | 49 +++++++++++++++++++++++ src/arch/armv7/bootblock_simple.c | 12 +----- src/arch/armv7/lib/id.lds | 2 +- 5 files changed, 142 insertions(+), 26 deletions(-)
diff --git a/src/arch/armv7/Makefile.inc b/src/arch/armv7/Makefile.inc index d7fbbdf..7702859 100644 --- a/src/arch/armv7/Makefile.inc +++ b/src/arch/armv7/Makefile.inc @@ -223,19 +223,14 @@ $(obj)/coreboot.pre: $(objcbfs)/romstage_xip.elf $(obj)/coreboot.pre1 $(CBFSTOOL ################################################################################ # Build the bootblock
-#bootblock_lds = $(src)/arch/armv7/ldscript_fallback_cbfs.lb -bootblock_lds = $(src)/arch/armv7/lib/id.lds -#bootblock_lds = $(src)/arch/armv7/romstage.ld +bootblock_lds = $(src)/arch/armv7/bootblock.lds +bootblock_lds += $(src)/arch/armv7/lib/id.lds bootblock_lds += $(chipset_bootblock_lds)
+bootblock_inc += $(src)/arch/armv7/bootblock.inc bootblock_inc += $(src)/arch/armv7/lib/id.inc bootblock_inc += $(chipset_bootblock_inc) - -# FIXME: CONFIG_NEON or something similar for ARM? -#ifeq ($(CONFIG_SSE),y) -#bootblock_inc += $(src)/cpu/x86/sse_enable.inc -#endif -#bootblock_inc += $(objgenerated)/bootblock.inc +bootblock_inc += $(objgenerated)/bootblock.inc
$(objgenerated)/bootblock.ld: $$(bootblock_lds) $(obj)/ldoptions @printf " GEN $(subst $(obj)/,,$(@))\n" @@ -253,11 +248,11 @@ $(objgenerated)/bootblock.s: $(objgenerated)/bootblock_inc.S $(obj)/config.h $(o @printf " CC $(subst $(obj)/,,$(@))\n" $(CC) -MMD -x assembler-with-cpp -E -I$(src)/include -I$(src)/arch/armv7/include -I$(obj) -include $(obj)/build.h -include $(obj)/config.h -I. -I$(src) $< -o $@
-#$(objgenerated)/bootblock.inc: $(src)/arch/armv7/init/$(subst ",,$(CONFIG_BOOTBLOCK_SOURCE)) $(objutil)/romcc/romcc $(OPTION_TABLE_H) -# @printf " ROMCC $(subst $(obj)/,,$(@))\n" -# $(CC) $(INCLUDES) -MM -MT$(objgenerated)/bootblock.inc \ -# $< > $(objgenerated)/bootblock.inc.d -# $(ROMCC) -c -S $(bootblock_romccflags) $(ROMCCFLAGS) -I. $(INCLUDES) $< -o $@ +$(objgenerated)/bootblock.inc: $(src)/arch/armv7/$(subst ",,$(CONFIG_BOOTBLOCK_SOURCE)) $(OPTION_TABLE_H) + @printf " ROMCC $(subst $(obj)/,,$(@))\n" + $(CC) $(INCLUDES) -MM -MT$(objgenerated)/bootblock.inc \ + $< > $(objgenerated)/bootblock.inc.d + $(CC) -c -S $(CFLAGS) -I. $(INCLUDES) $< -o $@
$(objcbfs)/bootblock.debug: $(objgenerated)/bootblock.o $(objgenerated)/bootblock.ld @printf " LINK $(subst $(obj)/,,$(@))\n" diff --git a/src/arch/armv7/bootblock.inc b/src/arch/armv7/bootblock.inc new file mode 100644 index 0000000..971b5eb --- /dev/null +++ b/src/arch/armv7/bootblock.inc @@ -0,0 +1,82 @@ +/* + * Early initialization code for ARMv7 architecture. + * + * This file is based off of the OMAP3530/ARM Cortex start.S file from Das + * U-Boot, which itself got the file from armboot. + * + * Copyright (c) 2004 Texas Instruments r-woodruff2@ti.com + * Copyright (c) 2001 Marius Gröger mag@sysgo.de + * Copyright (c) 2002 Alex Züpke azu@sysgo.de + * Copyright (c) 2002 Gary Jennejohn garyj@denx.de + * Copyright (c) 2003 Richard Woodruff r-woodruff2@ti.com + * Copyright (c) 2003 Kshitij kshitij@ti.com + * Copyright (c) 2006-2008 Syed Mohammed Khasim x0khasim@ti.com + * Copyright (c) 2013 The Chromium OS Authors + * + * 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; version 2 of + * the License. + * + * 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 <system.h> + +_bl1: + /* For now we have to live with a first stage boot loader + * on ARM, which is 8KB in size and it is prepended to the + * reset vector + */ + .skip 8192 + +.globl _start +_start: b reset + .balignl 16,0xdeadbeef + +_cbfs_master_header: + /* The CBFS master header is inserted here by cbfstool + * when coreboot.rom is being created. Hence, we leave + * some space for it. + */ + .skip 64 + +reset: + /* + * set the cpu to SVC32 mode + */ + mrs r0, cpsr + bic r0, r0, #0x1f + orr r0, r0, #0xd3 + msr cpsr,r0 + + /* + * From Cortex-A Series Programmer's Guide: + * Only CPU 0 performs initialization. Other CPUs go into WFI + * to do this, first work out which CPU this is + * this code typically is run before any other initialization step + */ + mrc p15, 0, r1, c0, c0, 5 @ Read Multiprocessor Affinity Register + and r1, r1, #0x3 @ Extract CPU ID bits + cmp r1, #0 + bne wait_for_interrupt @ If this is not core0, wait + +/* Set stackpointer in internal RAM to call board_init_f */ +call_bootblock: + ldr sp, =(0x0204F800) /* Set up stack pointer */ + mov sp, r0 + bic sp, sp, #7 /* 8-byte alignment for ABI compliance */ + ldr r0,=0x00000000 + bl main + +wait_for_interrupt: + wfi + mov pc, lr @ back to my caller diff --git a/src/arch/armv7/bootblock.lds b/src/arch/armv7/bootblock.lds new file mode 100644 index 0000000..90e37a0 --- /dev/null +++ b/src/arch/armv7/bootblock.lds @@ -0,0 +1,49 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2006 Advanced Micro Devices, Inc. + * Copyright (C) 2008-2010 coresystems GmbH + * + * 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; version 2 of the License. + * + * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/* We use ELF as output format. So that we can debug the code in some form. */ +OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm") +OUTPUT_ARCH(arm) + +TARGET(binary) +SECTIONS +{ + ROMLOC = 0x2023400 - 8192; + + /* This section might be better named .setup */ + .rom ROMLOC : { + _rom = .; + *(.text); + *(.text.*); + *(.rom.text); + *(.rom.data); + *(.rom.data.*); + *(.rodata.*); + _erom = .; + } = 0xff + + /DISCARD/ : { + *(.comment) + *(.note) + *(.comment.*) + *(.note.*) + *(.ARM.*) + } +} diff --git a/src/arch/armv7/bootblock_simple.c b/src/arch/armv7/bootblock_simple.c index f447a29..64da46c 100644 --- a/src/arch/armv7/bootblock_simple.c +++ b/src/arch/armv7/bootblock_simple.c @@ -23,24 +23,14 @@
#include <bootblock_common.h>
- -#include "../../lib/uart8250.c" -#include "lib/div.c" - -struct uart8250 uart = { - 115200 -}; - void main(unsigned long bist) { - init_uart8250(CONFIG_TTYS0_BASE, &uart); - uart8250_tx_byte(CONFIG_TTYS0_BASE, '@'); - if (boot_cpu()) { bootblock_cpu_init(); bootblock_northbridge_init(); bootblock_southbridge_init(); } + const char* target1 = "fallback/romstage"; unsigned long entry; entry = findstage(target1); diff --git a/src/arch/armv7/lib/id.lds b/src/arch/armv7/lib/id.lds index 9e31ee6..22b4a02 100644 --- a/src/arch/armv7/lib/id.lds +++ b/src/arch/armv7/lib/id.lds @@ -1,5 +1,5 @@ SECTIONS { - . = (0x100000000 - CONFIG_ID_SECTION_OFFSET) - (__id_end - __id_start); + . = (0x2024000) - (__id_end - __id_start); .id (.): { *(.id) }
-
Stefan Reinauer