4cea3a19f8
This is enabled by CONFIG_RAMPAYLOAD. The code will look for a ram payload and, if it is found, try to run it. If the load fails or the payload returns it will continue with ramstage. We also include a new payload, linuxcheck, which is intended to verify that linux can be loaded and run, e.g. as a LinuxBoot payload. Currently, it fails. This does not yet work but it makes sense as a foundation on which to build. For one thing, we need to build at least a few tables for Linux. The goal for LinuxBoot is to build as few as possible. To test with linuxcheck (linux is not even close to working): cd payloads/linuxcheck/ cp x86config .config make cd ../.. make ./build/cbfstool build/coreboot.rom add-payload -n fallback/rampayload -f payloads/linuxcheck/linuxcheck.elf qemu-system-x86_64 -nographic -m 8192 -bios build/coreboot.rom -monitor /dev/pts/$1 -s We need to change the payload menu so we can add a rampayload but it's a bit tricky as written, so that must come later. Note that I'm still creating a special purpose romselfboot. The idea of merging romselfboot and selfboot is probably a good idea -- in the future. I think until we know how this should look, such a merge is premature. Signed-off-by: Ronald G. Minnich <rminnich@gmail.com> Change-Id: I8199aae6776f6dee969b370b0e6a41ef96e854d8 clang-formatted-by: Ronald G. Minnich Reviewed-on: https://review.coreboot.org/28402 Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com> Tested-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
43 lines
1.4 KiB
C
43 lines
1.4 KiB
C
/*
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* This file is part of the coreinfo project.
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*
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* Copyright (C) 2018 Google Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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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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#include <libpayload-config.h>
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#include <libpayload.h>
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extern struct console_output_driver *console_out;
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extern struct sysinfo_t lib_sysinfo;
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static void buts(char *s)
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{
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int i;
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for (i = 0; i < strlen(s); i++)
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outb(s[i], 0x3f8);
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}
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int main(void)
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{
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buts("Greetings from linuxcheck, via hard-coded calls to serial functions.\n");
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if (console_out == NULL)
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buts("Bad news: console_out is NULL\n");
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if (lib_sysinfo.serial == NULL)
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buts("Bad news: lib_sysinfo.serial is NULL. Very little will work well.\n");
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buts("The next line should be puts works\n");
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puts("puts works\n");
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buts("If you did not see puts works, then you have a console issues\n");
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buts("The next line should be 'printf works'\n");
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printf("printf works\n");
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buts(" ... if you did not see printf works, then you have a printf issue\n");
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buts("Now we will halt. Bye");
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halt();
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return 0;
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}
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