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
  21 DECLARE_GLOBAL_DATA_PTR;
  22
  23 __weak void board_quiesce_devices(void)
  24 {
  25 }
  26
  27 int 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  */
  37 static 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
  65 static 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
  81 static 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
 111 int 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
 133 int 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 }