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 <asm/smp.h>
  17#include <dm/device.h>
  18#include <dm/root.h>
  19#include <u-boot/zlib.h>
  20
  21DECLARE_GLOBAL_DATA_PTR;
  22
  23__weak void board_quiesce_devices(void)
  24{
  25}
  26
  27int arch_fixup_fdt(void *blob)
  28{
  29        return 0;
  30}
  31
  32/**
  33 * announce_and_cleanup() - Print message and prepare for kernel boot
  34 *
  35 * @fake: non-zero to do everything except actually boot
  36 */
  37static void announce_and_cleanup(int fake)
  38{
  39        printf("\nStarting kernel ...%s\n\n", fake ?
  40                "(fake run for tracing)" : "");
  41        bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
  42#ifdef CONFIG_BOOTSTAGE_FDT
  43        bootstage_fdt_add_report();
  44#endif
  45#ifdef CONFIG_BOOTSTAGE_REPORT
  46        bootstage_report();
  47#endif
  48
  49#ifdef CONFIG_USB_DEVICE
  50        udc_disconnect();
  51#endif
  52
  53        board_quiesce_devices();
  54
  55        /*
  56         * Call remove function of all devices with a removal flag set.
  57         * This may be useful for last-stage operations, like cancelling
  58         * of DMA operation or releasing device internal buffers.
  59         */
  60        dm_remove_devices_flags(DM_REMOVE_ACTIVE_ALL);
  61
  62        cleanup_before_linux();
  63}
  64
  65static void boot_prep_linux(bootm_headers_t *images)
  66{
  67        if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) {
  68#ifdef CONFIG_OF_LIBFDT
  69                debug("using: FDT\n");
  70                if (image_setup_linux(images)) {
  71                        printf("FDT creation failed! hanging...");
  72                        hang();
  73                }
  74#endif
  75        } else {
  76                printf("Device tree not found or missing FDT support\n");
  77                hang();
  78        }
  79}
  80
  81static void boot_jump_linux(bootm_headers_t *images, int flag)
  82{
  83        void (*kernel)(ulong hart, void *dtb);
  84        int fake = (flag & BOOTM_STATE_OS_FAKE_GO);
  85#ifdef CONFIG_SMP
  86        int ret;
  87#endif
  88
  89        kernel = (void (*)(ulong, void *))images->ep;
  90
  91        bootstage_mark(BOOTSTAGE_ID_RUN_OS);
  92
  93        debug("## Transferring control to kernel (at address %08lx) ...\n",
  94              (ulong)kernel);
  95
  96        announce_and_cleanup(fake);
  97
  98        if (!fake) {
  99                if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) {
 100#ifdef CONFIG_SMP
 101                        ret = smp_call_function(images->ep,
 102                                                (ulong)images->ft_addr, 0, 0);
 103                        if (ret)
 104                                hang();
 105#endif
 106                        kernel(gd->arch.boot_hart, images->ft_addr);
 107                }
 108        }
 109}
 110
 111int do_bootm_linux(int flag, int argc, char * const argv[],
 112                   bootm_headers_t *images)
 113{
 114        /* No need for those on RISC-V */
 115        if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE)
 116                return -1;
 117
 118        if (flag & BOOTM_STATE_OS_PREP) {
 119                boot_prep_linux(images);
 120                return 0;
 121        }
 122
 123        if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) {
 124                boot_jump_linux(images, flag);
 125                return 0;
 126        }
 127
 128        boot_prep_linux(images);
 129        boot_jump_linux(images, flag);
 130        return 0;
 131}
 132
 133int do_bootm_vxworks(int flag, int argc, char * const argv[],
 134                     bootm_headers_t *images)
 135{
 136        return do_bootm_linux(flag, argc, argv, images);
 137}
 138