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