LXR uboot/arch/arm/lib/spl.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * (C) Copyright 2010-2012
   4 * Texas Instruments, <www.ti.com>
   5 *
   6 * Aneesh V <aneesh@ti.com>
   7 * Tom Rini <trini@ti.com>
   8 */
   9
  10#include <common.h>
  11#include <config.h>
  12#include <init.h>
  13#include <log.h>
  14#include <spl.h>
  15#include <image.h>
  16#include <asm/cache.h>
  17#include <asm/global_data.h>
  18#include <linux/compiler.h>
  19#include <asm/mach-types.h>
  20
  21#ifndef CONFIG_SPL_DM
  22/* Pointer to as well as the global data structure for SPL */
  23DECLARE_GLOBAL_DATA_PTR;
  24
  25/*
  26 * WARNING: This is going away very soon. Don't use it and don't submit
  27 * pafches that rely on it. The global_data area is set up in crt0.S.
  28 */
  29gd_t gdata __section(".data");
  30#endif
  31
  32/*
  33 * In the context of SPL, board_init_f() prepares the hardware for execution
  34 * from system RAM (DRAM, DDR...). As system RAM may not be available yet,
  35 * board_init_f() must use the current GD to store any data which must be
  36 * passed on to later stages. These data include the relocation destination,
  37 * the future stack, and the future GD location. BSS is cleared after this
  38 * function (and therefore must be accessible).
  39 *
  40 * We provide this version by default but mark it as __weak to allow for
  41 * platforms to do this in their own way if needed. Please see the top
  42 * level U-Boot README "Board Initialization Flow" section for info on what
  43 * to put in this function.
  44 */
  45void __weak board_init_f(ulong dummy)
  46{
  47}
  48
  49/*
  50 * This function jumps to an image with argument. Normally an FDT or ATAGS
  51 * image.
  52 */
  53#if CONFIG_IS_ENABLED(OS_BOOT)
  54#ifdef CONFIG_ARM64
  55void __noreturn jump_to_image_linux(struct spl_image_info *spl_image)
  56{
  57        debug("Entering kernel arg pointer: 0x%p\n", spl_image->arg);
  58        cleanup_before_linux();
  59        armv8_switch_to_el2((u64)spl_image->arg, 0, 0, 0,
  60                            spl_image->entry_point, ES_TO_AARCH64);
  61}
  62#else
  63void __noreturn jump_to_image_linux(struct spl_image_info *spl_image)
  64{
  65        unsigned long machid = 0xffffffff;
  66#ifdef CONFIG_MACH_TYPE
  67        machid = CONFIG_MACH_TYPE;
  68#endif
  69
  70        debug("Entering kernel arg pointer: 0x%p\n", spl_image->arg);
  71        typedef void (*image_entry_arg_t)(int, int, void *)
  72                __attribute__ ((noreturn));
  73        image_entry_arg_t image_entry =
  74                (image_entry_arg_t)(uintptr_t) spl_image->entry_point;
  75        cleanup_before_linux();
  76        image_entry(0, machid, spl_image->arg);
  77}
  78#endif  /* CONFIG_ARM64 */
  79#endif
  80
  81#if CONFIG_IS_ENABLED(OPTEE_IMAGE)
  82void __noreturn jump_to_image_optee(struct spl_image_info *spl_image)
  83{
  84        /* flush and turn off caches before jumping to OPTEE */
  85        cleanup_before_linux();
  86
  87        spl_optee_entry(NULL, NULL, spl_image->fdt_addr,
  88                        (void *)spl_image->entry_point);
  89}
  90#endif
  91