LXR uboot/arch/riscv/lib/bootm.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Copyright (C) 2011 Andes Technology Corporation
   4 * Shawn Lin, Andes Technology Corporation <nobuhiro@andestech.com>
   5 * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
   6 * Rick Chen, Andes Technology Corporation <rick@andestech.com>
   7 */
   8
   9#include <common.h>
  10#include <command.h>
  11#include <dm.h>
  12#include <dm/root.h>
  13#include <image.h>
  14#include <asm/byteorder.h>
  15#include <asm/csr.h>
  16#include <dm/device.h>
  17#include <dm/root.h>
  18#include <u-boot/zlib.h>
  19
  20DECLARE_GLOBAL_DATA_PTR;
  21
  22__weak void board_quiesce_devices(void)
  23{
  24}
  25
  26int arch_fixup_fdt(void *blob)
  27{
  28        return 0;
  29}
  30
  31/**
  32 * announce_and_cleanup() - Print message and prepare for kernel boot
  33 *
  34 * @fake: non-zero to do everything except actually boot
  35 */
  36static void announce_and_cleanup(int fake)
  37{
  38        printf("\nStarting kernel ...%s\n\n", fake ?
  39                "(fake run for tracing)" : "");
  40        bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
  41#ifdef CONFIG_BOOTSTAGE_FDT
  42        bootstage_fdt_add_report();
  43#endif
  44#ifdef CONFIG_BOOTSTAGE_REPORT
  45        bootstage_report();
  46#endif
  47
  48#ifdef CONFIG_USB_DEVICE
  49        udc_disconnect();
  50#endif
  51
  52        board_quiesce_devices();
  53
  54        /*
  55         * Call remove function of all devices with a removal flag set.
  56         * This may be useful for last-stage operations, like cancelling
  57         * of DMA operation or releasing device internal buffers.
  58         */
  59        dm_remove_devices_flags(DM_REMOVE_ACTIVE_ALL);
  60
  61        cleanup_before_linux();
  62}
  63
  64static void boot_prep_linux(bootm_headers_t *images)
  65{
  66        if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) {
  67#ifdef CONFIG_OF_LIBFDT
  68                debug("using: FDT\n");
  69                if (image_setup_linux(images)) {
  70                        printf("FDT creation failed! hanging...");
  71                        hang();
  72                }
  73#endif
  74        } else {
  75                printf("Device tree not found or missing FDT support\n");
  76                hang();
  77        }
  78}
  79
  80static void boot_jump_linux(bootm_headers_t *images, int flag)
  81{
  82        void (*kernel)(ulong hart, void *dtb);
  83        int fake = (flag & BOOTM_STATE_OS_FAKE_GO);
  84
  85        kernel = (void (*)(ulong, void *))images->ep;
  86
  87        bootstage_mark(BOOTSTAGE_ID_RUN_OS);
  88
  89        debug("## Transferring control to kernel (at address %08lx) ...\n",
  90              (ulong)kernel);
  91
  92        announce_and_cleanup(fake);
  93
  94        if (!fake) {
  95                if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len)
  96                        kernel(gd->arch.boot_hart, images->ft_addr);
  97        }
  98}
  99
 100int do_bootm_linux(int flag, int argc, char * const argv[],
 101                   bootm_headers_t *images)
 102{
 103        /* No need for those on RISC-V */
 104        if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE)
 105                return -1;
 106
 107        if (flag & BOOTM_STATE_OS_PREP) {
 108                boot_prep_linux(images);
 109                return 0;
 110        }
 111
 112        if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) {
 113                boot_jump_linux(images, flag);
 114                return 0;
 115        }
 116
 117        boot_prep_linux(images);
 118        boot_jump_linux(images, flag);
 119        return 0;
 120}
 121
 122int do_bootm_vxworks(int flag, int argc, char * const argv[],
 123                     bootm_headers_t *images)
 124{
 125        return do_bootm_linux(flag, argc, argv, images);
 126}
 127