wdenk | ef3386f | 2004-10-10 21:27:30 +0000 | [diff] [blame] | 1 | /* |
| 2 | * (C) Copyright 2003, Psyent Corporation <www.psyent.com> |
| 3 | * Scott McNutt <smcnutt@psyent.com> |
| 4 | * |
Wolfgang Denk | d79de1d | 2013-07-08 09:37:19 +0200 | [diff] [blame] | 5 | * SPDX-License-Identifier: GPL-2.0+ |
wdenk | ef3386f | 2004-10-10 21:27:30 +0000 | [diff] [blame] | 6 | */ |
| 7 | |
| 8 | #include <common.h> |
wdenk | ef3386f | 2004-10-10 21:27:30 +0000 | [diff] [blame] | 9 | |
Thomas Chou | 09a3dde | 2010-03-24 11:41:46 +0800 | [diff] [blame] | 10 | #define NIOS_MAGIC 0x534f494e /* enable command line and initrd passing */ |
| 11 | |
Wolfgang Denk | 6262d021 | 2010-06-28 22:00:46 +0200 | [diff] [blame] | 12 | int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images) |
wdenk | ef3386f | 2004-10-10 21:27:30 +0000 | [diff] [blame] | 13 | { |
Thomas Chou | 09a3dde | 2010-03-24 11:41:46 +0800 | [diff] [blame] | 14 | void (*kernel)(int, int, int, char *) = (void *)images->ep; |
| 15 | char *commandline = getenv("bootargs"); |
| 16 | ulong initrd_start = images->rd_start; |
| 17 | ulong initrd_end = images->rd_end; |
Thomas Chou | ac60514 | 2010-05-31 11:58:05 +0800 | [diff] [blame] | 18 | char *of_flat_tree = NULL; |
| 19 | #if defined(CONFIG_OF_LIBFDT) |
John Rigby | 708e667 | 2010-10-13 13:57:34 -0600 | [diff] [blame] | 20 | /* did generic code already find a device tree? */ |
| 21 | if (images->ft_len) |
| 22 | of_flat_tree = images->ft_addr; |
Thomas Chou | ac60514 | 2010-05-31 11:58:05 +0800 | [diff] [blame] | 23 | #endif |
Simon Glass | 794a921 | 2013-06-11 11:14:46 -0700 | [diff] [blame] | 24 | if (!of_flat_tree && argc > 1) |
| 25 | of_flat_tree = (char *)simple_strtoul(argv[1], NULL, 16); |
Thomas Chou | ac60514 | 2010-05-31 11:58:05 +0800 | [diff] [blame] | 26 | if (of_flat_tree) |
| 27 | initrd_end = (ulong)of_flat_tree; |
wdenk | 194b839 | 2005-03-30 23:28:18 +0000 | [diff] [blame] | 28 | |
Andreas Bießmann | da233ce | 2013-07-02 13:57:44 +0200 | [diff] [blame] | 29 | /* |
| 30 | * allow the PREP bootm subcommand, it is required for bootm to work |
| 31 | */ |
| 32 | if (flag & BOOTM_STATE_OS_PREP) |
| 33 | return 0; |
| 34 | |
Kumar Gala | 18178bc | 2008-10-21 17:25:45 -0500 | [diff] [blame] | 35 | if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) |
| 36 | return 1; |
| 37 | |
Renato Andreola | c3e530a | 2009-11-23 16:45:14 -0500 | [diff] [blame] | 38 | /* flushes data and instruction caches before calling the kernel */ |
Thomas Chou | 09a3dde | 2010-03-24 11:41:46 +0800 | [diff] [blame] | 39 | disable_interrupts(); |
Thomas Chou | 741085b | 2015-10-23 07:58:20 +0800 | [diff] [blame] | 40 | flush_dcache_all(); |
Renato Andreola | c3e530a | 2009-11-23 16:45:14 -0500 | [diff] [blame] | 41 | |
Thomas Chou | 09a3dde | 2010-03-24 11:41:46 +0800 | [diff] [blame] | 42 | debug("bootargs=%s @ 0x%lx\n", commandline, (ulong)&commandline); |
| 43 | debug("initrd=0x%lx-0x%lx\n", (ulong)initrd_start, (ulong)initrd_end); |
Thomas Chou | ac60514 | 2010-05-31 11:58:05 +0800 | [diff] [blame] | 44 | /* kernel parameters passing |
| 45 | * r4 : NIOS magic |
| 46 | * r5 : initrd start |
| 47 | * r6 : initrd end or fdt |
| 48 | * r7 : kernel command line |
| 49 | * fdt is passed to kernel via r6, the same as initrd_end. fdt will be |
| 50 | * verified with fdt magic. when both initrd and fdt are used at the |
| 51 | * same time, fdt must follow immediately after initrd. |
| 52 | */ |
Thomas Chou | 09a3dde | 2010-03-24 11:41:46 +0800 | [diff] [blame] | 53 | kernel(NIOS_MAGIC, initrd_start, initrd_end, commandline); |
Marian Balakowicz | df8ff33 | 2008-03-12 10:33:00 +0100 | [diff] [blame] | 54 | /* does not return */ |
Marian Balakowicz | df8ff33 | 2008-03-12 10:33:00 +0100 | [diff] [blame] | 55 | |
Kumar Gala | 48626aa | 2008-08-15 08:24:45 -0500 | [diff] [blame] | 56 | return 1; |
wdenk | ef3386f | 2004-10-10 21:27:30 +0000 | [diff] [blame] | 57 | } |