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