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https://github.com/brain-hackers/u-boot-brain
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983c72f479
At present the arguments to bootm are processed in a somewhat confusing way. Sub-functions must know how many arguments their calling functions have processed, and the OS boot function must also have this information. Also it isn't obvious that 'bootm' and 'bootm start' provide arguments in the same way. Adjust the code so that arguments are removed from the list before calling a sub-function. This means that all functions can know that argv[0] is the first argument of which they need to take notice. Signed-off-by: Simon Glass <sjg@chromium.org>
96 lines
2.7 KiB
C
96 lines
2.7 KiB
C
/*
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* (C) Copyright 2007 Michal Simek
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* (C) Copyright 2004 Atmark Techno, Inc.
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*
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* Michal SIMEK <monstr@monstr.eu>
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* Yasushi SHOJI <yashi@atmark-techno.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <command.h>
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#include <image.h>
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#include <u-boot/zlib.h>
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#include <asm/byteorder.h>
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DECLARE_GLOBAL_DATA_PTR;
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int do_bootm_linux(int flag, int argc, char * const argv[],
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bootm_headers_t *images)
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{
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/* First parameter is mapped to $r5 for kernel boot args */
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void (*thekernel) (char *, ulong, ulong);
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char *commandline = getenv("bootargs");
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ulong rd_data_start, rd_data_end;
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if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
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return 1;
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int ret;
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char *of_flat_tree = NULL;
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#if defined(CONFIG_OF_LIBFDT)
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/* did generic code already find a device tree? */
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if (images->ft_len)
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of_flat_tree = images->ft_addr;
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#endif
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thekernel = (void (*)(char *, ulong, ulong))images->ep;
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/* find ramdisk */
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ret = boot_get_ramdisk(argc, argv, images, IH_ARCH_MICROBLAZE,
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&rd_data_start, &rd_data_end);
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if (ret)
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return 1;
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bootstage_mark(BOOTSTAGE_ID_RUN_OS);
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if (!of_flat_tree && argc > 1)
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of_flat_tree = (char *)simple_strtoul(argv[1], NULL, 16);
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/* fixup the initrd now that we know where it should be */
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if (images->rd_start && images->rd_end && of_flat_tree)
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ret = fdt_initrd(of_flat_tree, images->rd_start,
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images->rd_end, 1);
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if (ret)
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return 1;
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#ifdef DEBUG
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printf("## Transferring control to Linux (at address 0x%08lx) ",
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(ulong)thekernel);
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printf("ramdisk 0x%08lx, FDT 0x%08lx...\n",
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rd_data_start, (ulong) of_flat_tree);
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#endif
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#ifdef XILINX_USE_DCACHE
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flush_cache(0, XILINX_DCACHE_BYTE_SIZE);
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#endif
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/*
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* Linux Kernel Parameters (passing device tree):
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* r5: pointer to command line
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* r6: pointer to ramdisk
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* r7: pointer to the fdt, followed by the board info data
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*/
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thekernel(commandline, rd_data_start, (ulong)of_flat_tree);
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/* does not return */
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return 1;
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}
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