86 lines
2.0 KiB
C
86 lines
2.0 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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* SPDX-License-Identifier: GPL-2.0+
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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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/*
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* allow the PREP bootm subcommand, it is required for bootm to work
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*/
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if (flag & BOOTM_STATE_OS_PREP)
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return 0;
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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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