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omap: add basic SPL support

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- Provide alternate implementations of board_init_f()
  board_init_r() for OMAP spl.
- Provide linker script
- Initialize global data
- Add serial console support
- Update CONFIG_SYS_TEXT_BASE to allow for SPL's bss and move
  it to board config header from config.mk

Signed-off-by: Aneesh V <aneesh@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
This commit is contained in:
Aneesh V
2011-07-21 09:10:21 -04:00
committed by U-Boot
parent 033ca72438
commit bcae721162
15 changed files with 257 additions and 64 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
arch/arm/cpu/armv7/Makefile
View File

@@ -26,7 +26,12 @@ include $(TOPDIR)/config.mk
LIB = $(obj)lib$(CPU).o
START := start.o
COBJS := cpu.o cache_v7.o
ifndef CONFIG_SPL_BUILD
COBJS += cache_v7.o
COBJS += cpu.o
endif
COBJS += syslib.o
SRCS := $(START:.o=.S) $(COBJS:.o=.c)

4
arch/arm/cpu/armv7/omap-common/Makefile
View File

@@ -30,6 +30,10 @@ SOBJS := reset.o
COBJS := timer.o
COBJS += utils.o
ifdef CONFIG_SPL_BUILD
COBJS += spl.o
endif
SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c)
OBJS := $(addprefix $(obj),$(SOBJS) $(COBJS))

82
arch/arm/cpu/armv7/omap-common/spl.c Normal file
View File

@@ -0,0 +1,82 @@
/*
* (C) Copyright 2010
* Texas Instruments, <www.ti.com>
*
* Aneesh V <aneesh@ti.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.h>
#include <asm/arch/sys_proto.h>
#include <timestamp_autogenerated.h>
#include <version_autogenerated.h>
DECLARE_GLOBAL_DATA_PTR;
/* Define global data structure pointer to it*/
static gd_t gdata __attribute__ ((section(".data")));
static bd_t bdata __attribute__ ((section(".data")));
inline void hang(void)
{
puts("### ERROR ### Please RESET the board ###\n");
for (;;)
;
}
void board_init_f(ulong dummy)
{
/*
* We call relocate_code() with relocation target same as the
* CONFIG_SYS_SPL_TEXT_BASE. This will result in relocation getting
* skipped. Instead, only .bss initialization will happen. That's
* all we need
*/
debug(">>board_init_f()\n");
relocate_code(CONFIG_SPL_STACK, &gdata, CONFIG_SPL_TEXT_BASE);
}
void board_init_r(gd_t *id, ulong dummy)
{
for (;;)
;
}
void preloader_console_init(void)
{
const char *u_boot_rev = U_BOOT_VERSION;
char rev_string_buffer[50];
gd = &gdata;
gd->bd = &bdata;
gd->flags |= GD_FLG_RELOC;
gd->baudrate = CONFIG_BAUDRATE;
setup_clocks_for_console();
serial_init(); /* serial communications setup */
/* Avoid a second "U-Boot" coming from this string */
u_boot_rev = &u_boot_rev[7];
printf("\nU-Boot SPL %s (%s - %s)\n", u_boot_rev, U_BOOT_DATE,
U_BOOT_TIME);
omap_rev_string(rev_string_buffer);
printf("Texas Instruments %s\n", rev_string_buffer);
}

62
arch/arm/cpu/armv7/omap-common/u-boot-spl.lds Normal file
View File

@@ -0,0 +1,62 @@
/*
* (C) Copyright 2002
* Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
*
* (C) Copyright 2010
* Texas Instruments, <www.ti.com>
* Aneesh V <aneesh@ti.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
*/
MEMORY { .sram : ORIGIN = CONFIG_SPL_TEXT_BASE,\
LENGTH = CONFIG_SPL_MAX_SIZE }
MEMORY { .sdram : ORIGIN = CONFIG_SPL_BSS_START_ADDR, \
LENGTH = CONFIG_SPL_BSS_MAX_SIZE }
OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
OUTPUT_ARCH(arm)
ENTRY(_start)
SECTIONS
{
.text :
{
__start = .;
arch/arm/cpu/armv7/start.o (.text)
*(.text*)
} >.sram
. = ALIGN(4);
.rodata : { *(SORT_BY_ALIGNMENT(.rodata*)) } >.sram
. = ALIGN(4);
.data : { *(SORT_BY_ALIGNMENT(.data*)) } >.sram
. = ALIGN(4);
__image_copy_end = .;
_end = .;
.bss :
{
. = ALIGN(4);
__bss_start = .;
*(.bss*)
. = ALIGN(4);
__bss_end__ = .;
} >.sdram
}

5
arch/arm/cpu/armv7/omap4/Makefile
View File

@@ -30,9 +30,12 @@ SOBJS += lowlevel_init.o
COBJS += board.o
COBJS += clocks.o
COBJS += emif.o
COBJS += mem.o
COBJS += sdram_elpida.o
ifndef CONFIG_SPL_BUILD
COBJS += mem.o
COBJS += sys_info.o
endif
SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c)
OBJS := $(addprefix $(obj),$(COBJS) $(SOBJS))

7
arch/arm/cpu/armv7/omap4/board.c
View File

@@ -155,7 +155,14 @@ void s_init(void)
init_omap4_revision();
watchdog_init();
set_mux_conf_regs();
#ifdef CONFIG_SPL_BUILD
preloader_console_init();
#endif
prcm_init();
#ifdef CONFIG_SPL_BUILD
/* For regular u-boot sdram_init() is called from dram_init() */
sdram_init();
#endif
}
/*

33
arch/arm/cpu/armv7/omap4/clocks.c
View File

@@ -791,6 +791,39 @@ void lock_dpll(u32 *const base)
wait_for_lock(base);
}
void setup_clocks_for_console(void)
{
/* Do not add any spl_debug prints in this function */
clrsetbits_le32(&prcm->cm_l4per_clkstctrl, CD_CLKCTRL_CLKTRCTRL_MASK,
CD_CLKCTRL_CLKTRCTRL_SW_WKUP <<
CD_CLKCTRL_CLKTRCTRL_SHIFT);
/* Enable all UARTs - console will be on one of them */
clrsetbits_le32(&prcm->cm_l4per_uart1_clkctrl,
MODULE_CLKCTRL_MODULEMODE_MASK,
MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN <<
MODULE_CLKCTRL_MODULEMODE_SHIFT);
clrsetbits_le32(&prcm->cm_l4per_uart2_clkctrl,
MODULE_CLKCTRL_MODULEMODE_MASK,
MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN <<
MODULE_CLKCTRL_MODULEMODE_SHIFT);
clrsetbits_le32(&prcm->cm_l4per_uart3_clkctrl,
MODULE_CLKCTRL_MODULEMODE_MASK,
MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN <<
MODULE_CLKCTRL_MODULEMODE_SHIFT);
clrsetbits_le32(&prcm->cm_l4per_uart3_clkctrl,
MODULE_CLKCTRL_MODULEMODE_MASK,
MODULE_CLKCTRL_MODULEMODE_SW_EXPLICIT_EN <<
MODULE_CLKCTRL_MODULEMODE_SHIFT);
clrsetbits_le32(&prcm->cm_l4per_clkstctrl, CD_CLKCTRL_CLKTRCTRL_MASK,
CD_CLKCTRL_CLKTRCTRL_HW_AUTO <<
CD_CLKCTRL_CLKTRCTRL_SHIFT);
}
void prcm_init(void)
{
switch (omap4_hw_init_context()) {