X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=arch%2Fnios2%2Flib%2Fbootm.c;h=00ade2c57319a5f34e450f93329e9e44fff80b94;hb=fdc1eccbd19e8ea45e527d2b199917c075b6a4cd;hp=5d25edf80d29a10c4cfbc19f92d8abe8359de7d1;hpb=83653121d7382fccfe329cb732f77f116341ef1d;p=u-boot

diff --git a/arch/nios2/lib/bootm.c b/arch/nios2/lib/bootm.c
index 5d25edf80d..00ade2c573 100644
--- a/arch/nios2/lib/bootm.c
+++ b/arch/nios2/lib/bootm.c
@@ -2,49 +2,54 @@
  * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
  * Scott McNutt <smcnutt@psyent.com>
  *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
+ * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
-#include <command.h>
-#include <asm/byteorder.h>
-#include <asm/cache.h>
 
 #define NIOS_MAGIC 0x534f494e /* enable command line and initrd passing */
 
-int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
+int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
 {
 	void (*kernel)(int, int, int, char *) = (void *)images->ep;
-	char *commandline = getenv("bootargs");
+	char *commandline = env_get("bootargs");
 	ulong initrd_start = images->rd_start;
 	ulong initrd_end = images->rd_end;
+	char *of_flat_tree = NULL;
+#if defined(CONFIG_OF_LIBFDT)
+	/* did generic code already find a device tree? */
+	if (images->ft_len)
+		of_flat_tree = images->ft_addr;
+#endif
+	if (!of_flat_tree && argc > 1)
+		of_flat_tree = (char *)simple_strtoul(argv[1], NULL, 16);
+	if (of_flat_tree)
+		initrd_end = (ulong)of_flat_tree;
+
+	/*
+	 * allow the PREP bootm subcommand, it is required for bootm to work
+	 */
+	if (flag & BOOTM_STATE_OS_PREP)
+		return 0;
 
 	if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
 		return 1;
 
 	/* flushes data and instruction caches before calling the kernel */
 	disable_interrupts();
-	flush_dcache((ulong)kernel, CONFIG_SYS_DCACHE_SIZE);
-	flush_icache((ulong)kernel, CONFIG_SYS_ICACHE_SIZE);
+	flush_dcache_all();
 
 	debug("bootargs=%s @ 0x%lx\n", commandline, (ulong)&commandline);
 	debug("initrd=0x%lx-0x%lx\n", (ulong)initrd_start, (ulong)initrd_end);
+	/* kernel parameters passing
+	 * r4 : NIOS magic
+	 * r5 : initrd start
+	 * r6 : initrd end or fdt
+	 * r7 : kernel command line
+	 * fdt is passed to kernel via r6, the same as initrd_end. fdt will be
+	 * verified with fdt magic. when both initrd and fdt are used at the
+	 * same time, fdt must follow immediately after initrd.
+	 */
 	kernel(NIOS_MAGIC, initrd_start, initrd_end, commandline);
 	/* does not return */