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/*
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* (C) Copyright 2003, Psyent Corporation <www.psyent.com>
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* Scott McNutt <smcnutt@psyent.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 <asm/byteorder.h>
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#include <asm/cache.h>
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#define NIOS_MAGIC 0x534f494e /* enable command line and initrd passing */
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int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
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{
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void (*kernel)(int, int, int, char *) = (void *)images->ep;
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char *commandline = getenv("bootargs");
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ulong initrd_start = images->rd_start;
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ulong initrd_end = images->rd_end;
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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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if (!of_flat_tree && argc > 1)
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of_flat_tree = (char *)simple_strtoul(argv[1], NULL, 16);
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if (of_flat_tree)
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initrd_end = (ulong)of_flat_tree;
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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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bootm: Add subcommands
Add the ability to break the steps of the bootm command into several
subcommands: start, loados, ramdisk, fdt, bdt, cmdline, prep, go.
This allows us to do things like manipulate device trees before
they are passed to a booting kernel or setup memory for a secondary
core in multicore situations.
Not all OS types support all subcommands (currently only start, loados,
ramdisk, fdt, and go are supported).
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
16 years ago
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if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
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return 1;
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/* flushes data and instruction caches before calling the kernel */
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disable_interrupts();
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flush_dcache((ulong)kernel, CONFIG_SYS_DCACHE_SIZE);
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flush_icache((ulong)kernel, CONFIG_SYS_ICACHE_SIZE);
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debug("bootargs=%s @ 0x%lx\n", commandline, (ulong)&commandline);
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debug("initrd=0x%lx-0x%lx\n", (ulong)initrd_start, (ulong)initrd_end);
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/* kernel parameters passing
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* r4 : NIOS magic
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* r5 : initrd start
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* r6 : initrd end or fdt
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* r7 : kernel command line
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* fdt is passed to kernel via r6, the same as initrd_end. fdt will be
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* verified with fdt magic. when both initrd and fdt are used at the
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* same time, fdt must follow immediately after initrd.
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*/
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kernel(NIOS_MAGIC, initrd_start, initrd_end, commandline);
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/* does not return */
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return 1;
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}
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