| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | /* |
| 2 | * U-boot - boot.c - misc boot helper functions |
| 3 | * |
| 4 | * Copyright (c) 2005-2008 Analog Devices Inc. |
| 5 | * |
| 6 | * (C) Copyright 2000-2004 |
| 7 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
| 8 | * |
| 9 | * Licensed under the GPL-2 or later. |
| 10 | */ |
| 11 | |
| 12 | #include <common.h> |
| 13 | #include <command.h> |
| 14 | #include <image.h> |
| 15 | #include <asm/blackfin.h> |
| 16 | |
| 17 | #ifdef SHARED_RESOURCES |
| 18 | extern void swap_to(int device_id); |
| 19 | #endif |
| 20 | |
| 21 | #ifdef CONFIG_VIDEO |
| 22 | extern void video_stop(void); |
| 23 | #endif |
| 24 | |
| 25 | static char *make_command_line(void) |
| 26 | { |
| 27 | char *dest = (char *)CONFIG_LINUX_CMDLINE_ADDR; |
| 28 | char *bootargs = getenv("bootargs"); |
| 29 | |
| 30 | if (bootargs == NULL) |
| 31 | return NULL; |
| 32 | |
| 33 | strncpy(dest, bootargs, CONFIG_LINUX_CMDLINE_SIZE); |
| 34 | dest[CONFIG_LINUX_CMDLINE_SIZE - 1] = 0; |
| 35 | return dest; |
| 36 | } |
| 37 | |
| 38 | extern ulong bfin_poweron_retx; |
| 39 | |
| 40 | int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images) |
| 41 | { |
| 42 | int (*appl) (char *cmdline); |
| 43 | char *cmdline; |
| 44 | |
| 45 | if (flag & BOOTM_STATE_OS_PREP) |
| 46 | return 0; |
| 47 | if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) |
| 48 | return 1; |
| 49 | |
| 50 | #ifdef SHARED_RESOURCES |
| 51 | swap_to(FLASH); |
| 52 | #endif |
| 53 | |
| 54 | #ifdef CONFIG_VIDEO |
| 55 | /* maybe this should be standardized and moved to bootm ... */ |
| 56 | video_stop(); |
| 57 | #endif |
| 58 | |
| 59 | appl = (int (*)(char *))images->ep; |
| 60 | |
| 61 | printf("Starting Kernel at = %p\n", appl); |
| 62 | cmdline = make_command_line(); |
| 63 | icache_disable(); |
| 64 | dcache_disable(); |
| 65 | asm __volatile__( |
| 66 | "RETX = %[retx];" |
| 67 | "CALL (%0);" |
| 68 | : |
| 69 | : "p"(appl), "q0"(cmdline), [retx] "d"(bfin_poweron_retx) |
| 70 | ); |
| 71 | /* does not return */ |
| 72 | |
| 73 | return 1; |
| 74 | } |