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rampayload: Add the linuxcheck payload 

The i386.c file uses standard 3f8 UART for some simple diagnostic
prints, and the libpayload console otherwise.

This payload was used to debug Linux as a rampayload and was very helpful
for that work.

Change-Id: I1cce5528780cd825fd91a88137fa70abd9f218e7
Signed-off-by: Ronald G. Minnich <rminnich@gmail.com>
Reviewed-on: https://review.coreboot.org/28600
Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Ronald G. Minnich 2018-09-14 01:21:05 -07:00
parent 374d992fc8
commit 95c331b94b
4 changed files with 159 additions and 0 deletions
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37
payloads/linuxcheck/Makefile Normal file
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LIBPAYLOAD_DIR=$(CURDIR)/libpayload
XCOMPILE=$(LIBPAYLOAD_DIR)/libpayload.xcompile
# build libpayload and put .config file in $(CURDIR) instead of ../libpayload
# to avoid pollute the libpayload source directory and possible conflicts
LPOPTS=obj="$(CURDIR)/build" DESTDIR="$(CURDIR)" DOTCONFIG="$(CURDIR)/.config"
CFLAGS += -Wall -Werror -Os -ffreestanding -nostdinc -nostdlib
ifeq ($(CONFIG_ARCH_X86),y)
TARGETARCH = i386
endif
all: linuxcheck.elf
$(LIBPAYLOAD_DIR):
$(MAKE) -C ../libpayload $(LPOPTS) defconfig
$(MAKE) -C ../libpayload $(LPOPTS)
$(MAKE) -C ../libpayload $(LPOPTS) install
ifneq ($(strip $(wildcard libpayload)),)
include $(XCOMPILE)
LPGCC = CC="$(GCC_CC_x86_32)" "$(LIBPAYLOAD_DIR)/bin/lpgcc"
%.elf: %.c Makefile
$(LPGCC) $(CFLAGS) -o $*.elf $*.c $(TARGETARCH).c
else
# If libpayload is not found, first build libpayload,
# then do the make, this time it'll find libpayload
# and generate the linuxcheck.elf target
%.elf: $(LIBPAYLOAD_DIR)
$(MAKE) all
endif
clean:
rm -f linuxcheck.elf
distclean: clean
rm -rf build libpayload .config .config.old
.PHONY: all clean distclean

48
payloads/linuxcheck/i386.c Normal file
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/*
* This file is part of the coreinfo project.
*
* Copyright (C) 2018 Google Inc.
*
* 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; version 2 of the License.
*
* 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.
*/
#include <libpayload-config.h>
#include <libpayload.h>
#include "linuxcheck.h"
void buts(char *s)
{
int i;
for (i = 0; i < strlen(s); i++)
outb(s[i], 0x3f8);
}
void hex4(u8 c)
{
static char *hex = "0123456789abcdef";
outb(hex[c & 0xf], 0x3f8);
}
void hex8(u8 c)
{
hex4(c >> 4);
hex4(c);
}
void hex16(u16 c)
{
hex8((u8)(c >> 8));
hex8((u8)c);
}
void hex32(u32 c)
{
hex16((u16)(c >> 16));
hex16((u16)c);
}

52
payloads/linuxcheck/linuxcheck.c Normal file
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/*
* This file is part of the coreinfo project.
*
* Copyright (C) 2018 Google Inc.
*
* 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; version 2 of the License.
*
* 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.
*/
#include <libpayload-config.h>
#include <libpayload.h>
#include "linuxcheck.h"
extern struct console_output_driver *console_out;
extern struct sysinfo_t lib_sysinfo;
int main(void)
{
int ret, i;
buts("Greetings from linuxcheck, via hard-coded calls to serial functions.\n");
if (console_out == NULL)
buts("Bad news: console_out is NULL\n");
if (lib_sysinfo.serial == NULL)
buts("Bad news: lib_sysinfo.serial is NULL. Very little will work well.\n");
ret = lib_get_sysinfo();
if (ret) {
buts("lib_get_sysinfo() is non-zero");
hex32(ret);
buts("\n");
}
buts("The next line should be puts works\n");
puts("puts works\n");
buts("If you did not see puts works, then you have a console issues\n");
buts("The next line should be 'printf works'\n");
printf("printf works\n");
buts(" ... if you did not see printf works, then you have a printf issue\n");
printf("Number of memory ranges: %d\n", lib_sysinfo.n_memranges);
for (i = 0; i < lib_sysinfo.n_memranges; i++) {
printf("%d: base 0x%08llx size 0x%08llx type 0x%x\n", i, lib_sysinfo.memrange[i].base, lib_sysinfo.memrange[i].size, lib_sysinfo.memrange[i].type);
}
buts("Now we will halt. Bye");
halt();
return 0;
}

22
payloads/linuxcheck/linuxcheck.h Normal file
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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2018 Google Inc.
*
* 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; version 2 of the License.
*
* 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.
*/
/* buts is a programmed IO byte puts, which you need to write for all platforms. */
void buts(char *s);
void hex4(u8 c);
void hex8(u8 c);
void hex16(u16 c);
void hex32(u32 c);