+// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2007 Michal Simek
* (C) Copyright 2004 Atmark Techno, Inc.
*
* Michal SIMEK <monstr@monstr.eu>
* Yasushi SHOJI <yashi@atmark-techno.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
*/
#include <common.h>
#include <command.h>
+#include <cpu_func.h>
+#include <env.h>
+#include <fdt_support.h>
#include <image.h>
#include <u-boot/zlib.h>
#include <asm/byteorder.h>
DECLARE_GLOBAL_DATA_PTR;
-int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
+static ulong get_sp(void)
{
- /* First parameter is mapped to $r5 for kernel boot args */
- void (*theKernel) (char *, ulong, ulong);
- char *commandline = getenv ("bootargs");
- ulong rd_data_start, rd_data_end;
+ ulong ret;
- if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
- return 1;
+ asm("addik %0, r1, 0" : "=r"(ret) : );
+ return ret;
+}
- int ret;
+void arch_lmb_reserve(struct lmb *lmb)
+{
+ ulong sp, bank_end;
+ int bank;
- 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
+ /*
+ * Booting a (Linux) kernel image
+ *
+ * Allocate space for command line and board info - the
+ * address should be as high as possible within the reach of
+ * the kernel (see CONFIG_SYS_BOOTMAPSZ settings), but in unused
+ * memory, which means far enough below the current stack
+ * pointer.
+ */
+ sp = get_sp();
+ debug("## Current stack ends at 0x%08lx ", sp);
+
+ /* adjust sp by 4K to be safe */
+ sp -= 4096;
+ for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
+ if (sp < gd->bd->bi_dram[bank].start)
+ continue;
+ bank_end = gd->bd->bi_dram[bank].start +
+ gd->bd->bi_dram[bank].size;
+ if (sp >= bank_end)
+ continue;
+ lmb_reserve(lmb, sp, bank_end - sp);
+ break;
+ }
+}
- theKernel = (void (*)(char *, ulong, ulong))images->ep;
+static void boot_jump_linux(bootm_headers_t *images, int flag)
+{
+ void (*thekernel)(char *cmdline, ulong rd, ulong dt);
+ ulong dt = (ulong)images->ft_addr;
+ ulong rd_start = images->initrd_start;
+ ulong cmdline = images->cmdline_start;
+ int fake = (flag & BOOTM_STATE_OS_FAKE_GO);
- /* find ramdisk */
- ret = boot_get_ramdisk (argc, argv, images, IH_ARCH_MICROBLAZE,
- &rd_data_start, &rd_data_end);
- if (ret)
- return 1;
+ thekernel = (void (*)(char *, ulong, ulong))images->ep;
- show_boot_progress(BOOTSTAGE_ID_RUN_OS);
+ debug("## Transferring control to Linux (at address 0x%08lx) ",
+ (ulong)thekernel);
+ debug("cmdline 0x%08lx, ramdisk 0x%08lx, FDT 0x%08lx...\n",
+ cmdline, rd_start, dt);
+ bootstage_mark(BOOTSTAGE_ID_RUN_OS);
- if (!of_flat_tree && argc > 3)
- of_flat_tree = (char *)simple_strtoul(argv[3], NULL, 16);
-#ifdef DEBUG
- printf ("## Transferring control to Linux (at address 0x%08lx) " \
- "ramdisk 0x%08lx, FDT 0x%08lx...\n",
- (ulong) theKernel, rd_data_start, (ulong) of_flat_tree);
-#endif
+ printf("\nStarting kernel ...%s\n\n", fake ?
+ "(fake run for tracing)" : "");
+ bootstage_mark_name(BOOTSTAGE_ID_BOOTM_HANDOFF, "start_kernel");
#ifdef XILINX_USE_DCACHE
-#ifdef XILINX_DCACHE_BYTE_SIZE
flush_cache(0, XILINX_DCACHE_BYTE_SIZE);
-#else
-#warning please rebuild BSPs and update configuration
- flush_cache(0, 32768);
#endif
-#endif
- /*
- * Linux Kernel Parameters (passing device tree):
- * r5: pointer to command line
- * r6: pointer to ramdisk
- * r7: pointer to the fdt, followed by the board info data
- */
- theKernel (commandline, rd_data_start, (ulong) of_flat_tree);
- /* does not return */
+ if (!fake) {
+ /*
+ * Linux Kernel Parameters (passing device tree):
+ * r5: pointer to command line
+ * r6: pointer to ramdisk
+ * r7: pointer to the fdt, followed by the board info data
+ */
+ thekernel((char *)cmdline, rd_start, dt);
+ /* does not return */
+ }
+}
+
+static void boot_prep_linux(bootm_headers_t *images)
+{
+ if (IMAGE_ENABLE_OF_LIBFDT && images->ft_len) {
+ debug("using: FDT\n");
+ if (image_setup_linux(images)) {
+ printf("FDT creation failed! hanging...");
+ hang();
+ }
+ }
+}
+
+int do_bootm_linux(int flag, int argc, char * const argv[],
+ bootm_headers_t *images)
+{
+ images->cmdline_start = (ulong)env_get("bootargs");
+
+ /* cmdline init is the part of 'prep' and nothing to do for 'bdt' */
+ if (flag & BOOTM_STATE_OS_BD_T || flag & BOOTM_STATE_OS_CMDLINE)
+ return -1;
+
+ if (flag & BOOTM_STATE_OS_PREP) {
+ boot_prep_linux(images);
+ return 0;
+ }
+
+ if (flag & (BOOTM_STATE_OS_GO | BOOTM_STATE_OS_FAKE_GO)) {
+ boot_jump_linux(images, flag);
+ return 0;
+ }
+
+ boot_prep_linux(images);
+ boot_jump_linux(images, flag);
return 1;
}
projects / oweals / u-boot.git / blobdiff