David Hendricks (dhendrix@chromium.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/2118
-gerrit
commit 2a571ceb9e58759cc06bf9fa5831ddc61180393b Author: David Hendricks dhendrix@chromium.org Date: Tue Jan 8 21:05:06 2013 -0800
ARM bootblock approach (incomplete)
Do not attempt to commit, just making this available so it doesn't get lost
Note: Apply "patchdump" patch set 12 or later for this to reach the bootblock's main() function.
Change-Id: I9cc2a8191d2db38b27b6363ba673e5a360de9684 Signed-off-by: Stefan Reinauer reinauer@google.com Signed-off-by: David Hendricks dhendrix@chromium.org --- src/arch/armv7/Makefile.inc | 26 ++++----- src/arch/armv7/bootblock.inc | 87 +++++++++++++++++++++++++++++ src/arch/armv7/bootblock.lds | 49 ++++++++++++++++ src/arch/armv7/bootblock_simple.c | 33 +++++------ src/arch/armv7/include/arch/cbfs.h | 53 ++++++++++++++++++ src/arch/armv7/include/bootblock_common.h | 71 +++-------------------- src/arch/armv7/init.S | 93 ------------------------------- src/arch/armv7/lib/id.lds | 2 +- src/cpu/samsung/exynos5250/Kconfig | 4 +- src/cpu/samsung/exynos5250/Makefile.inc | 2 +- 10 files changed, 228 insertions(+), 192 deletions(-)
diff --git a/src/arch/armv7/Makefile.inc b/src/arch/armv7/Makefile.inc index 8176f9a..e97e2d7 100644 --- a/src/arch/armv7/Makefile.inc +++ b/src/arch/armv7/Makefile.inc @@ -49,7 +49,7 @@ prebuilt-files = $(foreach file,$(cbfs-files), $(call extract_nth,1,$(file))) $(obj)/coreboot.pre1: $(objcbfs)/bootblock.bin $$(prebuilt-files) $(CBFSTOOL) $(CBFSTOOL) $@.tmp create -m armv7 -s $(CONFIG_COREBOOT_ROMSIZE_KB)K \ -B $(objcbfs)/bootblock.bin -a 64 \ - -o $$(( $(CONFIG_ROM_SIZE) - $(CONFIG_CBFS_SIZE) )) + -o $(CONFIG_BOOTBLOCK_OFFSET) $(prebuild-files) true mv $@.tmp $@ else @@ -149,7 +149,6 @@ CFLAGS += \ # For various headers imported from Linux CFLAGS += -D__LINUX_ARM_ARCH__=7
-crt0s = $(src)/arch/armv7/init.S ldscripts = ldscripts += $(src)/arch/armv7/romstage.ld
@@ -223,19 +222,14 @@ $(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 +247,11 @@ $(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 " CC $(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..90850d6 --- /dev/null +++ b/src/arch/armv7/bootblock.inc @@ -0,0 +1,87 @@ +/* + * 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, =(CONFIG_SYS_INIT_SP_ADDR) /* Set up stack pointer */ + bic sp, sp, #7 /* 8-byte alignment for ABI compliance */ + ldr r0,=0x00000000 + /* + * Use "bl" instead of "b" even though we do not intend to return. + * "bl" gets compiled to "blx" if we're transitioning from ARM to + * Thumb. However, "b" will not and GCC may attempt to create a + * wrapper which is currently broken. + */ + 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..772a7b2 100644 --- a/src/arch/armv7/bootblock_simple.c +++ b/src/arch/armv7/bootblock_simple.c @@ -19,33 +19,30 @@ * MA 02110-1301 USA */
- - #include <bootblock_common.h> +#include <arch/hlt.h>
- -#include "../../lib/uart8250.c" -#include "lib/div.c" - -struct uart8250 uart = { - 115200 -}; +static int boot_cpu(void) +{ + /* + * FIXME: This is a stub for now. All non-boot CPUs should be + * waiting for an interrupt. We could move the chunk of assembly + * which puts them to sleep in here... + */ + return 1; +}
void main(unsigned long bist) { - init_uart8250(CONFIG_TTYS0_BASE, &uart); - uart8250_tx_byte(CONFIG_TTYS0_BASE, '@'); + const char *target1 = "fallback/romstage"; + unsigned long entry;
if (boot_cpu()) { - bootblock_cpu_init(); - bootblock_northbridge_init(); - bootblock_southbridge_init(); + bootblock_mainboard_init(); } - const char* target1 = "fallback/romstage"; - unsigned long entry; + entry = findstage(target1); - if (entry) call(entry, bist); + if (entry) call(entry);
hlt(); } - diff --git a/src/arch/armv7/include/arch/cbfs.h b/src/arch/armv7/include/arch/cbfs.h new file mode 100644 index 0000000..363d26c --- /dev/null +++ b/src/arch/armv7/include/arch/cbfs.h @@ -0,0 +1,53 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2012 The ChromiumOS Authors. All rights reserved. + * + * 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 + */ + +#ifndef __INCLUDE_ARCH_CBFS__ +#define __INCLUDE_ARCH_CBFS__ + +static void *walkcbfs(const char *target) +{ + /* FIXME: stubbed out for now */ + return (void *)0; +#if 0 + void *entry; + asm volatile ( + "mov $1f, %%esp\n\t" + "jmp walkcbfs_asm\n\t" + "1:\n\t" : "=a" (entry) : "S" (target) : "ebx", "ecx", "edi", "esp"); + return entry; +#endif +} + +/* just enough to support findstage. copied because the original version doesn't easily pass through romcc */ +struct cbfs_stage_restricted { + unsigned long compression; + unsigned long entry; // this is really 64bit, but properly endianized +}; + +static inline unsigned long findstage(const char *target) +{ + return ((struct cbfs_stage_restricted *)walkcbfs(target))->entry; +} + +static inline void call(unsigned long addr) +{ + void (*doit)(void) = (void *)addr; + doit(); +} +#endif diff --git a/src/arch/armv7/include/bootblock_common.h b/src/arch/armv7/include/bootblock_common.h index f5c7129..9565593 100644 --- a/src/arch/armv7/include/bootblock_common.h +++ b/src/arch/armv7/include/bootblock_common.h @@ -1,69 +1,16 @@ -#include <types.h> -#include <cbfs.h> -#include <string.h> -#include <arch/byteorder.h> - - -#define boot_cpu(x) 1 +#include <arch/cbfs.h>
#ifdef CONFIG_BOOTBLOCK_CPU_INIT #include CONFIG_BOOTBLOCK_CPU_INIT -#else -static void bootblock_cpu_init(void) { } -#endif -#ifdef CONFIG_BOOTBLOCK_NORTHBRIDGE_INIT -#include CONFIG_BOOTBLOCK_NORTHBRIDGE_INIT -#else -static void bootblock_northbridge_init(void) { } -#endif -#ifdef CONFIG_BOOTBLOCK_SOUTHBRIDGE_INIT -#include CONFIG_BOOTBLOCK_SOUTHBRIDGE_INIT -#else -static void bootblock_southbridge_init(void) { } #endif
-static int cbfs_check_magic(struct cbfs_file *file) -{ - return !strcmp(file->magic, CBFS_FILE_MAGIC) ? 1 : 0; -} - -static unsigned long findstage(const char* target) -{ - unsigned long offset; - - void *ptr = (void *)*((unsigned long *) CBFS_HEADPTR_ADDR); - struct cbfs_header *header = (struct cbfs_header *) ptr; - // if (ntohl(header->magic) != CBFS_HEADER_MAGIC) - // printk(BIOS_ERR, "ERROR: No valid CBFS header found!\n"); - - offset = 0 - ntohl(header->romsize) + ntohl(header->offset); - int align = ntohl(header->align); - while(1) { - struct cbfs_file *file = (struct cbfs_file *) offset; - if (!cbfs_check_magic(file)) - return 0; - if (!strcmp(CBFS_NAME(file), target)) - return (unsigned long)CBFS_SUBHEADER(file); - int flen = ntohl(file->len); - int foffset = ntohl(file->offset); - unsigned long oldoffset = offset; - offset = ALIGN(offset + foffset + flen, align); - if (offset <= oldoffset) - return 0; - if (offset < 0xFFFFFFFF - ntohl(header->romsize)) - return 0; - } -} - - -static void call(unsigned long addr, unsigned long bist) -{ - asm volatile ("mov r0, %1\nbx %0\n" : : "r" (addr), "r" (bist)); -} - -static void hlt(void) +#ifdef CONFIG_BOOTBLOCK_MAINBOARD_INIT +#include CONFIG_BOOTBLOCK_MAINBOARD_INIT +#else +static void bootblock_mainboard_init(void) { - /* is there such a thing as hlt on ARM? */ - // asm volatile ("1:\n\thlt\n\tjmp 1b\n\t"); - asm volatile ("1:\nb 1b\n\t"); +#ifdef CONFIG_BOOTBLOCK_CPU_INIT + bootblock_cpu_init(); +#endif } +#endif diff --git a/src/arch/armv7/init.S b/src/arch/armv7/init.S deleted file mode 100644 index 7848581..0000000 --- a/src/arch/armv7/init.S +++ /dev/null @@ -1,93 +0,0 @@ -/* - * 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; 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 <system.h> - -.globl _start -_start: b reset - ldr pc, _undefined_instruction - ldr pc, _software_interrupt - ldr pc, _prefetch_abort - ldr pc, _data_abort - ldr pc, _not_used - ldr pc, _irq - ldr pc, _fiq -_undefined_instruction: .word _undefined_instruction -_software_interrupt: .word _software_interrupt -_prefetch_abort: .word _prefetch_abort -_data_abort: .word _data_abort -_not_used: .word _not_used -_irq: .word _irq -_fiq: .word _fiq -_pad: .word 0x12345678 /* now 16*4=64 */ - - .balignl 16,0xdeadbeef - -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 V=0 in CP15 SCTRL register - for VBAR to point to vector */ - mrc p15, 0, r0, c1, c0, 0 @ Read CP15 SCTRL Register - bic r0, #CR_V @ V = 0 - mcr p15, 0, r0, c1, c0, 0 @ Write CP15 SCTRL Register - - /* Set vector address in CP15 VBAR register */ - ldr r0, =_start - mcr p15, 0, r0, c12, c0, 0 @Set VBAR - -/* Set stackpointer in internal RAM to call board_init_f */ -call_board_init_f: - ldr sp, =(CONFIG_SYS_INIT_SP_ADDR) - mov sp, r0 - bic sp, sp, #7 /* 8-byte alignment for ABI compliance */ - ldr r0,=0x00000000 - bl board_init_f - -wait_for_interrupt: - wfi - mov pc, lr @ back to my caller 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) } diff --git a/src/cpu/samsung/exynos5250/Kconfig b/src/cpu/samsung/exynos5250/Kconfig index 360c57f..6a0fe3d 100644 --- a/src/cpu/samsung/exynos5250/Kconfig +++ b/src/cpu/samsung/exynos5250/Kconfig @@ -1,6 +1,8 @@ +# FIXME: shouldn't this be 0x3400? Or maybe the bootblock in ROM needs +# to follow the BL1 image, but in SRAM it needs to be at 0x3400? Hm... config BOOTBLOCK_OFFSET hex "Bootblock offset" - default 0x3400 + default 0x2000 help This is where the Coreboot bootblock resides. For Exynos5250, this value is pre-determined by the vendor-provided BL1. diff --git a/src/cpu/samsung/exynos5250/Makefile.inc b/src/cpu/samsung/exynos5250/Makefile.inc index 1ff2327..dd2db2b 100644 --- a/src/cpu/samsung/exynos5250/Makefile.inc +++ b/src/cpu/samsung/exynos5250/Makefile.inc @@ -38,5 +38,5 @@ ramstage-$(CONFIG_SPL_BUILD) += dmc_init_ddr3.c
exynos5250_add_bl1: $(obj)/coreboot.pre printf " DD Adding Samsung Exynos5250 BL1\n" - dd if=3rdparty/cpu/samsung/exynos5250/E5250.nbl1.bin \ + dd if=3rdparty/cpu/samsung/exynos5250/E5250.nbl1.30k_bl2.bin \ of=$(obj)/coreboot.pre conv=notrunc >/dev/null 2>&1
-
David Hendricks