From 6507f133f3201ed5fb22e4a3d73c33b47497539d Mon Sep 17 00:00:00 2001 From: Tom Rini Date: Wed, 22 Aug 2012 15:31:05 -0700 Subject: SPL: Create arch/arm/lib/spl.c for board_init_f and jump_to_image_linux In SPL (CONFIG_SPL_FRAMEWORK) board_init_f must setup the stack pointer, clear the BSS and call board_init_r. We mark this as weak as some platforms may need to perform additional initalization at this point. We provide a gd that we know will be in a usable location, once the BSS has been cleared to help with this as well. Finally, we no longer call relocate_code so remove that from the armv7 version. Next, both board_init_f and jump_to_image_linux are going to be inherently arch-specific, so move these versions to arch/arm/lib/spl.c Signed-off-by: Tom Rini --- arch/arm/lib/spl.c | 72 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 arch/arm/lib/spl.c (limited to 'arch/arm/lib/spl.c') diff --git a/arch/arm/lib/spl.c b/arch/arm/lib/spl.c new file mode 100644 index 0000000..f568f61 --- /dev/null +++ b/arch/arm/lib/spl.c @@ -0,0 +1,72 @@ +/* + * (C) Copyright 2010-2012 + * Texas Instruments, + * + * Aneesh V + * Tom Rini + * + * 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 + +/* Pointer to as well as the global data structure for SPL */ +DECLARE_GLOBAL_DATA_PTR; +gd_t gdata __attribute__ ((section(".data"))); + +/* + * In the context of SPL, board_init_f must ensure that any clocks/etc for + * DDR are enabled, ensure that the stack pointer is valid, clear the BSS + * and call board_init_f. We provide this version by default but mark it + * as __weak to allow for platforms to do this in their own way if needed. + */ +void __weak board_init_f(ulong dummy) +{ + /* Set the stack pointer. */ + asm volatile("mov sp, %0\n" : : "r"(CONFIG_SPL_STACK)); + + /* Clear the BSS. */ + memset(__bss_start, 0, __bss_end__ - __bss_start); + + /* Set global data pointer. */ + gd = &gdata; + + board_init_r(NULL, 0); +} + +/* + * This function jumps to an image with argument. Normally an FDT or ATAGS + * image. + * arg: Pointer to paramter image in RAM + */ +#ifdef CONFIG_SPL_OS_BOOT +void __noreturn jump_to_image_linux(void *arg) +{ + debug("Entering kernel arg pointer: 0x%p\n", arg); + typedef void (*image_entry_arg_t)(int, int, void *) + __attribute__ ((noreturn)); + image_entry_arg_t image_entry = + (image_entry_arg_t) spl_image.entry_point; + cleanup_before_linux(); + image_entry(0, CONFIG_MACH_TYPE, arg); +} +#endif -- cgit v1.1