u-boot/arch/arm/lib/spl.c
Vikas Manocha 5bf5250e9d spl: make image arg or fdt blob address reconfigurable
At present fdt blob or argument address being passed to kernel is fixed at
compile time using macro CONFIG_SYS_SPL_ARGS_ADDR. FDT blob from
different media like nand, nor flash are copied to the address pointed
by the macro.
The problem is, it makes args/fdt blob compulsory to copy which is not required
in cases like for NOR Flash. This patch removes this limitation.

Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
2017-05-08 11:38:40 -04:00

64 lines
1.9 KiB
C

/*
* (C) Copyright 2010-2012
* Texas Instruments, <www.ti.com>
*
* Aneesh V <aneesh@ti.com>
* Tom Rini <trini@ti.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <config.h>
#include <spl.h>
#include <image.h>
#include <linux/compiler.h>
#ifndef CONFIG_SPL_DM
/* Pointer to as well as the global data structure for SPL */
DECLARE_GLOBAL_DATA_PTR;
/*
* WARNING: This is going away very soon. Don't use it and don't submit
* pafches that rely on it. The global_data area is set up in crt0.S.
*/
gd_t gdata __attribute__ ((section(".data")));
#endif
/*
* In the context of SPL, board_init_f() prepares the hardware for execution
* from system RAM (DRAM, DDR...). As system RAM may not be available yet,
* board_init_f() must use the current GD to store any data which must be
* passed on to later stages. These data include the relocation destination,
* the future stack, and the future GD location. BSS is cleared after this
* function (and therefore must be accessible).
*
* We provide this version by default but mark it as __weak to allow for
* platforms to do this in their own way if needed. Please see the top
* level U-Boot README "Board Initialization Flow" section for info on what
* to put in this function.
*/
void __weak board_init_f(ulong dummy)
{
}
/*
* This function jumps to an image with argument. Normally an FDT or ATAGS
* image.
*/
#ifdef CONFIG_SPL_OS_BOOT
void __noreturn jump_to_image_linux(struct spl_image_info *spl_image)
{
unsigned long machid = 0xffffffff;
#ifdef CONFIG_MACH_TYPE
machid = CONFIG_MACH_TYPE;
#endif
debug("Entering kernel arg pointer: 0x%p\n", spl_image->arg);
typedef void (*image_entry_arg_t)(int, int, void *)
__attribute__ ((noreturn));
image_entry_arg_t image_entry =
(image_entry_arg_t)(uintptr_t) spl_image->entry_point;
cleanup_before_linux();
image_entry(0, machid, spl_image->arg);
}
#endif