1// SPDX-License-Identifier: GPL-2.0+ 2/* 3 * Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved. 4 */ 5 6#include <bootm.h> 7#include <bootstage.h> 8#include <env.h> 9#include <image.h> 10#include <irq_func.h> 11#include <log.h> 12#include <asm/cache.h> 13#include <asm/global_data.h> 14 15DECLARE_GLOBAL_DATA_PTR; 16 17static int cleanup_before_linux(void) 18{ 19 disable_interrupts(); 20 sync_n_cleanup_cache_all(); 21 22 return 0; 23} 24 25__weak int board_prep_linux(struct bootm_headers *images) { return 0; } 26 27/* Subcommand: PREP */ 28static int boot_prep_linux(struct bootm_headers *images) 29{ 30 int ret; 31 32 if (IS_ENABLED(CONFIG_LMB)) { 33 ret = image_setup_linux(images); 34 if (ret) 35 return ret; 36 } 37 38 return board_prep_linux(images); 39} 40 41/* Generic implementation for single core CPU */ 42__weak void board_jump_and_run(ulong entry, int zero, int arch, uint params) 43{ 44 void (*kernel_entry)(int zero, int arch, uint params); 45 46 kernel_entry = (void (*)(int, int, uint))entry; 47 48 kernel_entry(zero, arch, params); 49} 50 51/* Subcommand: GO */ 52static void boot_jump_linux(struct bootm_headers *images, int flag) 53{ 54 ulong kernel_entry; 55 unsigned int r0, r2; 56 int fake = (flag & BOOTM_STATE_OS_FAKE_GO); 57 58 kernel_entry = images->ep; 59 60 debug("## Transferring control to Linux (at address %08lx)...\n", 61 kernel_entry); 62 bootstage_mark(BOOTSTAGE_ID_RUN_OS); 63 64 printf("\nStarting kernel ...%s\n\n", fake ? 65 "(fake run for tracing)" : ""); 66 bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel"); 67 68 if (CONFIG_IS_ENABLED(OF_LIBFDT) && images->ft_len) { 69 r0 = 2; 70 r2 = (unsigned int)images->ft_addr; 71 } else { 72 r0 = 1; 73 r2 = (unsigned int)env_get("bootargs"); 74 } 75 76 cleanup_before_linux(); 77 78 if (!fake) 79 board_jump_and_run(kernel_entry, r0, 0, r2); 80} 81 82int do_bootm_linux(int flag, struct bootm_info *bmi) 83{ 84 struct bootm_headers *images = bmi->images; 85 86 /* No need for those on ARC */ 87 if ((flag & BOOTM_STATE_OS_BD_T) || (flag & BOOTM_STATE_OS_CMDLINE)) 88 return -1; 89 90 if (flag & BOOTM_STATE_OS_PREP) 91 return boot_prep_linux(images); 92 93 if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) { 94 boot_jump_linux(images, flag); 95 return 0; 96 } 97 98 return -1; 99} 100