From bcae72116257201d7288cb8c525a29aea4875b95 Mon Sep 17 00:00:00 2001 From: Aneesh V Date: Thu, 21 Jul 2011 09:10:21 -0400 Subject: omap: add basic SPL support - 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 Signed-off-by: Sandeep Paulraj --- arch/arm/cpu/armv7/Makefile | 7 ++- arch/arm/cpu/armv7/omap-common/Makefile | 4 ++ arch/arm/cpu/armv7/omap-common/spl.c | 82 +++++++++++++++++++++++++++ arch/arm/cpu/armv7/omap-common/u-boot-spl.lds | 62 ++++++++++++++++++++ arch/arm/cpu/armv7/omap4/Makefile | 5 +- arch/arm/cpu/armv7/omap4/board.c | 7 +++ arch/arm/cpu/armv7/omap4/clocks.c | 33 +++++++++++ arch/arm/include/asm/arch-omap4/sys_proto.h | 1 + arch/arm/include/asm/omap_common.h | 2 + 9 files changed, 201 insertions(+), 2 deletions(-) create mode 100644 arch/arm/cpu/armv7/omap-common/spl.c create mode 100644 arch/arm/cpu/armv7/omap-common/u-boot-spl.lds (limited to 'arch') diff --git a/arch/arm/cpu/armv7/Makefile b/arch/arm/cpu/armv7/Makefile index 299792a..92a5a96 100644 --- a/arch/arm/cpu/armv7/Makefile +++ b/arch/arm/cpu/armv7/Makefile @@ -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) diff --git a/arch/arm/cpu/armv7/omap-common/Makefile b/arch/arm/cpu/armv7/omap-common/Makefile index 8f698f8..0708796 100644 --- a/arch/arm/cpu/armv7/omap-common/Makefile +++ b/arch/arm/cpu/armv7/omap-common/Makefile @@ -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)) diff --git a/arch/arm/cpu/armv7/omap-common/spl.c b/arch/arm/cpu/armv7/omap-common/spl.c new file mode 100644 index 0000000..b201543 --- /dev/null +++ b/arch/arm/cpu/armv7/omap-common/spl.c @@ -0,0 +1,82 @@ +/* + * (C) Copyright 2010 + * Texas Instruments, + * + * Aneesh V + * + * 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 +#include +#include + +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); +} diff --git a/arch/arm/cpu/armv7/omap-common/u-boot-spl.lds b/arch/arm/cpu/armv7/omap-common/u-boot-spl.lds new file mode 100644 index 0000000..8867e06 --- /dev/null +++ b/arch/arm/cpu/armv7/omap-common/u-boot-spl.lds @@ -0,0 +1,62 @@ +/* + * (C) Copyright 2002 + * Gary Jennejohn, DENX Software Engineering, + * + * (C) Copyright 2010 + * Texas Instruments, + * Aneesh V + * + * 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 +} diff --git a/arch/arm/cpu/armv7/omap4/Makefile b/arch/arm/cpu/armv7/omap4/Makefile index e1ccd68..e7ee0b8 100644 --- a/arch/arm/cpu/armv7/omap4/Makefile +++ b/arch/arm/cpu/armv7/omap4/Makefile @@ -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)) diff --git a/arch/arm/cpu/armv7/omap4/board.c b/arch/arm/cpu/armv7/omap4/board.c index 786c239..54dd509 100644 --- a/arch/arm/cpu/armv7/omap4/board.c +++ b/arch/arm/cpu/armv7/omap4/board.c @@ -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 } /* diff --git a/arch/arm/cpu/armv7/omap4/clocks.c b/arch/arm/cpu/armv7/omap4/clocks.c index e8d3a52..f1e233a 100644 --- a/arch/arm/cpu/armv7/omap4/clocks.c +++ b/arch/arm/cpu/armv7/omap4/clocks.c @@ -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()) { diff --git a/arch/arm/include/asm/arch-omap4/sys_proto.h b/arch/arm/include/asm/arch-omap4/sys_proto.h index 1e62878..a81f8e5 100644 --- a/arch/arm/include/asm/arch-omap4/sys_proto.h +++ b/arch/arm/include/asm/arch-omap4/sys_proto.h @@ -44,6 +44,7 @@ u32 wait_on_value(u32, u32, void *, u32); void sdelay(unsigned long); void set_pl310_ctrl_reg(u32 val); void omap_rev_string(char *omap4_rev_string); +void setup_clocks_for_console(void); void prcm_init(void); void bypass_dpll(u32 *const base); void freq_update_core(void); diff --git a/arch/arm/include/asm/omap_common.h b/arch/arm/include/asm/omap_common.h index 33caa4e..69d53d2 100644 --- a/arch/arm/include/asm/omap_common.h +++ b/arch/arm/include/asm/omap_common.h @@ -34,4 +34,6 @@ #define OMAP_INIT_CONTEXT_UBOOT_AFTER_SPL 2 #define OMAP_INIT_CONTEXT_UBOOT_AFTER_CH 3 +void preloader_console_init(void); + #endif /* _OMAP_COMMON_H_ */ -- cgit v1.1