diff options
Diffstat (limited to 'payloads/libpayload/i386')
| -rw-r--r-- | payloads/libpayload/i386/Makefile.inc | 2 | ||||
| -rw-r--r-- | payloads/libpayload/i386/head.S | 21 | ||||
| -rw-r--r-- | payloads/libpayload/i386/main.c | 13 | ||||
| -rw-r--r-- | payloads/libpayload/i386/multiboot.c | 96 | ||||
| -rw-r--r-- | payloads/libpayload/i386/sysinfo.c | 11 |
5 files changed, 140 insertions, 3 deletions
diff --git a/payloads/libpayload/i386/Makefile.inc b/payloads/libpayload/i386/Makefile.inc index bb6bcb5a11..40d2699062 100644 --- a/payloads/libpayload/i386/Makefile.inc +++ b/payloads/libpayload/i386/Makefile.inc @@ -31,3 +31,5 @@ TARGETS-y += i386/head.S.o i386/main.o i386/sysinfo.o TARGETS-y += i386/timer.o i386/coreboot.o i386/util.S.o TARGETS-y += i386/exec.S.o i386/virtual.o +# Multiboot support is configurable +TARGETS-$(CONFIG_MULTIBOOT) += i386/multiboot.o diff --git a/payloads/libpayload/i386/head.S b/payloads/libpayload/i386/head.S index 54f60e1469..db18a5195f 100644 --- a/payloads/libpayload/i386/head.S +++ b/payloads/libpayload/i386/head.S @@ -27,6 +27,7 @@ * SUCH DAMAGE. */ + .code32 .global _entry, _leave .text .align 4 @@ -42,6 +43,21 @@ _entry: /* We're back - go back to the bootloader. */ ret + .align 4 + +#define MB_MAGIC 0x1BADB002 +#define MB_FLAGS 0x00010003 + +mb_header: + .long MB_MAGIC + .long MB_FLAGS + .long -(MB_MAGIC + MB_FLAGS) + .long mb_header + .long _start + .long _edata + .long _end + .long _init + /* * This function saves off the previous stack and switches us to our * own execution environment. @@ -53,6 +69,11 @@ _init: /* Store current stack pointer. */ movl %esp, %esi + /* Store EAX and EBX */ + + movl %eax,loader_eax + movl %ebx,loader_ebx + /* Setup new stack. */ movl $_stack, %ebx diff --git a/payloads/libpayload/i386/main.c b/payloads/libpayload/i386/main.c index 25e4de46d7..48d6ef5495 100644 --- a/payloads/libpayload/i386/main.c +++ b/payloads/libpayload/i386/main.c @@ -29,13 +29,21 @@ #include <libpayload.h> +unsigned long loader_eax; /**< The value of EAX passed from the loader */ +unsigned long loader_ebx; /**< The value of EBX passed from the loader */ + +unsigned int main_argc; /**< The argc value to pass to main() */ + +/** The argv value to pass to main() */ +char *main_argv[MAX_ARGC_COUNT]; + /** * This is our C entry function - set up the system * and jump into the payload entry point. */ void start_main(void) { - extern int main(void); + extern int main(int argc, char **argv); /* Set up the consoles. */ console_init(); @@ -52,7 +60,8 @@ void start_main(void) * Go to the entry point. * In the future we may care about the return value. */ - (void) main(); + + (void) main(main_argc, (main_argc != 0) ? main_argv : NULL); /* * Returning here will go to the _leave function to return diff --git a/payloads/libpayload/i386/multiboot.c b/payloads/libpayload/i386/multiboot.c new file mode 100644 index 0000000000..09e72c768b --- /dev/null +++ b/payloads/libpayload/i386/multiboot.c @@ -0,0 +1,96 @@ +/* + * This file is part of the libpayload project. + * + * Copyright (C) 2008 Advanced Micro Devices, Inc. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <config.h> +#include <libpayload.h> +#include <multiboot_tables.h> + +extern unsigned long loader_eax; +extern unsigned long loader_ebx; + +static void mb_parse_mmap(struct multiboot_header *table, + struct sysinfo_t *info) +{ + u8 *start = (u8 *) phys_to_virt(table->mmap_addr); + u8 *ptr = start; + + info->n_memranges = 0; + + while(ptr < (start + table->mmap_length)) { + struct multiboot_mmap *mmap = (struct multiboot_mmap *) ptr; + + /* 1 == normal RAM. Ignore everything else for now */ + + if (mmap->type == 1) { + info->memrange[info->n_memranges].base = mmap->addr; + info->memrange[info->n_memranges].size = mmap->length; + + if (++info->n_memranges == SYSINFO_MAX_MEM_RANGES) + return; + } + + ptr += (mmap->size + sizeof(mmap->size)); + } +} + +static void mb_parse_cmdline(struct multiboot_header *table) +{ + extern int main_argc; + extern char *main_argv[]; + char *c = phys_to_virt(table->cmdline); + + while(*c != '\0' && main_argc < MAX_ARGC_COUNT) { + main_argv[main_argc++] = c; + + for( ; *c != '\0' && !isspace(*c); c++); + + if (*c) { + *c = 0; + c++; + } + } +} + +int get_multiboot_info(struct sysinfo_t *info) +{ + struct multiboot_header *table; + + if (loader_eax != MULTIBOOT_MAGIC) + return -1; + + table = (struct multiboot_header *) phys_to_virt(loader_ebx); + + if (table->flags & MULTIBOOT_FLAGS_MMAP) + mb_parse_mmap(table, info); + + if (table->flags & MULTIBOOT_FLAGS_CMDLINE) + mb_parse_cmdline(table); + + return 0; +} diff --git a/payloads/libpayload/i386/sysinfo.c b/payloads/libpayload/i386/sysinfo.c index a845a2817b..a074361f4f 100644 --- a/payloads/libpayload/i386/sysinfo.c +++ b/payloads/libpayload/i386/sysinfo.c @@ -29,6 +29,7 @@ #include <config.h> #include <libpayload.h> +#include <multiboot_tables.h> /** * This is a global structure that is used through the library - we set it @@ -48,7 +49,15 @@ void lib_get_sysinfo(void) /* Get the CPU speed (for delays). */ lib_sysinfo.cpu_khz = get_cpu_speed(); - /* Get the memory information. */ +#ifdef CONFIG_MULTIBOOT + /* Get the information from the multiboot tables, + * if they exist */ + get_multiboot_info(&lib_sysinfo); +#endif + + /* Get information from the coreboot tables, + * if they exist */ + get_coreboot_info(&lib_sysinfo); if (!lib_sysinfo.n_memranges) { |