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
  20 DECLARE_GLOBAL_DATA_PTR;
  21
  22 __weak void board_quiesce_devices(void)
  23 {
  24 }
  25
  26 int 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  */
  36 static 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
  64 static 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
  80 static 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 Linux (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
 100 int 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 }