diff options
| -rw-r--r-- | src/arch/i386/core/multiboot_loader.c | 208 |
1 files changed, 0 insertions, 208 deletions
diff --git a/src/arch/i386/core/multiboot_loader.c b/src/arch/i386/core/multiboot_loader.c deleted file mode 100644 index 562252427..000000000 --- a/src/arch/i386/core/multiboot_loader.c +++ /dev/null @@ -1,208 +0,0 @@ -/* Multiboot support - * - * 2003-07-02 mmap fix and header probe by SONE Takeshi - */ - -struct multiboot_mods { - unsigned mod_start; - unsigned mod_end; - unsigned char *string; - unsigned reserved; -}; - -struct multiboot_mmap { - unsigned int size; - unsigned int base_addr_low; - unsigned int base_addr_high; - unsigned int length_low; - unsigned int length_high; - unsigned int type; -}; - -/* The structure of a Multiboot 0.6 parameter block. */ -struct multiboot_info { - unsigned int flags; -#define MULTIBOOT_MEM_VALID 0x01 -#define MULTIBOOT_BOOT_DEV_VALID 0x02 -#define MULTIBOOT_CMDLINE_VALID 0x04 -#define MULTIBOOT_MODS_VALID 0x08 -#define MULTIBOOT_AOUT_SYMS_VALID 0x10 -#define MULTIBOOT_ELF_SYMS_VALID 0x20 -#define MULTIBOOT_MMAP_VALID 0x40 - unsigned int memlower; - unsigned int memupper; - unsigned int bootdev; - unsigned int cmdline; /* physical address of the command line */ - unsigned mods_count; - struct multiboot_mods *mods_addr; - unsigned syms_num; - unsigned syms_size; - unsigned syms_addr; - unsigned syms_shndx; - unsigned mmap_length; - unsigned mmap_addr; - /* The structure actually ends here, so I might as well put - * the ugly e820 parameters here... - */ - struct multiboot_mmap mmap[E820MAX]; -}; - -/* Multiboot image header (minimal part) */ -struct multiboot_header { - unsigned int magic; -#define MULTIBOOT_HEADER_MAGIC 0x1BADB002 - unsigned int flags; - unsigned int checksum; -}; - -static struct multiboot_header *mbheader; -static unsigned int mbimgoffset, mboffset; -static unsigned char mbbuffer[12]; - -static struct multiboot_info mbinfo; - -static void multiboot_init(void) -{ - mbheader = NULL; - mbimgoffset = 0; - mboffset = 0; -} - -/* Remember this probing function is actually different from the usual probing - * functions, since the Multiboot header is somewhere in the first 8KB of the - * image and it is byte aligned, but there is not much more known about how to - * find it. In the Etherboot context the most complicated issue is that the - * image has to be processed block-by-block, with unknown block size and no - * guarantees about block alignment with respect to the image. */ -static void multiboot_peek(unsigned char *data, int len) -{ - struct multiboot_header *h; - - /* If we have already searched the first 8KB of the image or if we have - * already found a valid Multiboot header, skip this code. */ - if ((mboffset == 12) || (mbimgoffset >= 8192)) - return; - - if (mbimgoffset + len >= 8192) - len = 8192 - mbimgoffset; - - /* This piece of code is pretty stupid, since it always copies data, even - * if it is word aligned. This shouldn't matter too much on platforms that - * use the Multiboot spec, since the processors are usually reasonably fast - * and this code is only executed for the first 8KB of the image. Feel - * free to improve it, but be prepared to write quite a lot of code that - * deals with non-aligned data with respect to the image to load. */ - while (len > 0) { - mbimgoffset++; - memcpy(mbbuffer + mboffset, data, 1); - mboffset++; - data++; - len--; - if (mboffset == 4) { - /* Accumulated a word into the buffer. */ - h = (struct multiboot_header *)mbbuffer; - if (h->magic != MULTIBOOT_HEADER_MAGIC) { - /* Wrong magic, this cannot be the start of the header. */ - mboffset = 0; - } - } else if (mboffset == 12) { - /* Accumulated the minimum header data into the buffer. */ - h = (struct multiboot_header *)mbbuffer; - if (h->magic + h->flags + h->checksum != 0) { - /* Checksum error, not a valid header. Check for a possible - * header starting in the current flag/checksum field. */ - if (h->flags == MULTIBOOT_HEADER_MAGIC) { - mboffset -= 4; - memmove(mbbuffer, mbbuffer + 4, mboffset); - } else if (h->checksum == MULTIBOOT_HEADER_MAGIC) { - mboffset -= 8; - memmove(mbbuffer, mbbuffer + 8, mboffset); - } else { - mboffset = 0; - } - } else { - printf("Multiboot... "); - mbheader = h; - if ((h->flags & 0xfffc) != 0) { - printf("\nERROR: Unsupported Multiboot requirements flags\n"); - longjmp(restart_etherboot, -2); - } - break; - } - } - } - mbimgoffset += len; -} - -static inline void multiboot_boot(unsigned long entry) -{ - unsigned char cmdline[512], *c; - int i; - if (!mbheader) - return; - /* Etherboot limits the command line to the kernel name, - * default parameters and user prompted parameters. All of - * them are shorter than 256 bytes. As the kernel name and - * the default parameters come from the same BOOTP/DHCP entry - * (or if they don't, the parameters are empty), only two - * strings of the maximum size are possible. Note this buffer - * can overrun if a stupid file name is chosen. Oh well. */ - c = cmdline; - for (i = 0; KERNEL_BUF[i] != '\0'; i++) { - switch (KERNEL_BUF[i]) { - case ' ': - case '\\': - case '"': - *c++ = '\\'; - break; - default: - break; - } - *c++ = KERNEL_BUF[i]; - } - if (addparam != NULL) { - *c++ = ' '; - memcpy(c, addparam, addparamlen); - c += addparamlen; - } - (void)sprintf(c, " -retaddr %#lX", virt_to_phys(xend32)); - - mbinfo.flags = MULTIBOOT_MMAP_VALID | MULTIBOOT_MEM_VALID |MULTIBOOT_CMDLINE_VALID; - mbinfo.memlower = meminfo.basememsize; - mbinfo.memupper = meminfo.memsize; - mbinfo.bootdev = 0; /* not booted from disk */ - mbinfo.cmdline = virt_to_phys(cmdline); - for (i = 0; i < (int) meminfo.map_count; i++) { - mbinfo.mmap[i].size = sizeof(struct multiboot_mmap) - - sizeof(unsigned int); - mbinfo.mmap[i].base_addr_low = - (unsigned int) meminfo.map[i].addr; - mbinfo.mmap[i].base_addr_high = - (unsigned int) (meminfo.map[i].addr >> 32); - mbinfo.mmap[i].length_low = - (unsigned int) meminfo.map[i].size; - mbinfo.mmap[i].length_high = - (unsigned int) (meminfo.map[i].size >> 32); - mbinfo.mmap[i].type = meminfo.map[i].type; - } - mbinfo.mmap_length = meminfo.map_count * sizeof(struct multiboot_mmap); - mbinfo.mmap_addr = virt_to_phys(mbinfo.mmap); - - /* The Multiboot 0.6 spec requires all segment registers to be - * loaded with an unrestricted, writeable segment. - * xstart32 does this for us. - */ - - /* Start the kernel, passing the Multiboot information record - * and the magic number. */ - os_regs.eax = 0x2BADB002; - os_regs.ebx = virt_to_phys(&mbinfo); - xstart32(entry); - /* A Multiboot kernel by default never returns - there is nothing in the - * specification about what happens to the boot loader after the kernel has - * been started. Thus if the kernel returns it is definitely aware of the - * semantics involved (i.e. the "-retaddr" parameter). Do not treat this - * as an error, but restart with a fresh DHCP request in order to activate - * the menu again in case one is used. */ - longjmp(restart_etherboot, 2); -} |