This code adds support for coreboot images that use ROMFS.
It also removes the call to FILO from hardwaremain -- that has needed removal for a long time. abuild tested. Note that this code has been tested and works on both qemu and kontron. The changes to use it are coming next. Signed-off-by: Ronald G. Minnich <rminnich@gmail.com> Acked-by: Patrick Georgi <patrick.georgi@coresystems.de> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4039 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Ronald G. Minnich
Patrick Georgi
parent
f834e20ba3
commit
ae63126346
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@ -1,5 +1,8 @@
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object elfboot.o
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object hardwaremain.o
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if CONFIG_ROMFS
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object selfboot.o
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end
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if CONFIG_FS_PAYLOAD
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object filo.o
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end
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@ -88,10 +88,21 @@ void hardwaremain(int boot_complete)
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*/
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lb_mem = write_tables();
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#if CONFIG_FS_PAYLOAD == 1
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filo(lb_mem);
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#if CONFIG_ROMFS == 1
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printk_err("=================================================\n");
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#if USE_FALLBACK_IMAGE == 1
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void (*pl)(void) = romfs_load_payload(lb_mem, "fallback/payload");
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#else
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elfboot(lb_mem);
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void (*pl)(void) = romfs_load_payload(lb_mem, "normal/payload");
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#endif
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#endif
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#warning elfboot will soon be deprecated
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printk_err("Trying elfboot, but that will be gone soon!\n");
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elfboot(lb_mem);
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printk_err("NO BOOT METHOD succeeded\n");
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}
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@ -0,0 +1,497 @@
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#include <console/console.h>
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#include <part/fallback_boot.h>
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#include <boot/elf.h>
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#include <boot/elf_boot.h>
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#include <boot/coreboot_tables.h>
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#include <ip_checksum.h>
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#include <stream/read_bytes.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <romfs.h>
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#ifndef CONFIG_BIG_ENDIAN
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#define ntohl(x) ( ((x&0xff)<<24) | ((x&0xff00)<<8) | \
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((x&0xff0000) >> 8) | ((x&0xff000000) >> 24) )
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#else
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#define ntohl(x) (x)
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#endif
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/* Maximum physical address we can use for the coreboot bounce buffer.
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*/
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#ifndef MAX_ADDR
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#define MAX_ADDR -1UL
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#endif
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extern unsigned char _ram_seg;
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extern unsigned char _eram_seg;
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struct segment {
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struct segment *next;
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struct segment *prev;
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struct segment *phdr_next;
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struct segment *phdr_prev;
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unsigned long s_dstaddr;
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unsigned long s_srcaddr;
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unsigned long s_memsz;
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unsigned long s_filesz;
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};
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struct verify_callback {
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struct verify_callback *next;
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int (*callback)(struct verify_callback *vcb,
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Elf_ehdr *ehdr, Elf_phdr *phdr, struct segment *head);
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unsigned long desc_offset;
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unsigned long desc_addr;
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};
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struct ip_checksum_vcb {
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struct verify_callback data;
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unsigned short ip_checksum;
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};
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int romfs_self_decompress(int algo, void *src,struct segment *new)
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{
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u8 *dst;
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/* for uncompressed, it's easy: just point at the area in ROM */
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if (algo == ROMFS_COMPRESS_NONE) {
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new->s_srcaddr = (u32) src;
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new->s_filesz = new->s_memsz;
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return 0;
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}
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/* for compression, let's keep it simple. We'll malloc the destination
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* area and decompress to there. The compression overhead far outweighs
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* any overhead for an extra copy.
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*/
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dst = malloc(new->s_memsz);
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if (! dst)
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return -1;
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switch(algo) {
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#ifdef CONFIG_COMPRESSION_LZMA
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case ROMFS_COMPRESS_LZMA: {
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unsigned long ulzma(unsigned char *src, unsigned char *dst);
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ulzma(src, dst);
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}
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#endif
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#ifdef CONFIG_COMPRESSION_NRV2B
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case ROMFS_COMPRESS_NRV2B: {
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unsigned long unrv2b(u8 *src, u8 *dst, unsigned long *ilen_p);
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unsigned long tmp;
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unrv2b(src, dst, &tmp);
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}
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#endif
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default:
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printk_info( "ROMFS: Unknown compression type %d\n",
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algo);
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return -1;
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}
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new->s_srcaddr = (u32) dst;
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new->s_filesz = new->s_memsz;
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return 0;
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}
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/* The problem:
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* Static executables all want to share the same addresses
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* in memory because only a few addresses are reliably present on
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* a machine, and implementing general relocation is hard.
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*
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* The solution:
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* - Allocate a buffer twice the size of the coreboot image.
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* - Anything that would overwrite coreboot copy into the lower half of
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* the buffer.
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* - After loading an ELF image copy coreboot to the upper half of the
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* buffer.
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* - Then jump to the loaded image.
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*
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* Benefits:
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* - Nearly arbitrary standalone executables can be loaded.
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* - Coreboot is preserved, so it can be returned to.
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* - The implementation is still relatively simple,
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* and much simpler then the general case implemented in kexec.
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*
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*/
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static unsigned long get_bounce_buffer(struct lb_memory *mem)
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{
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unsigned long lb_size;
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unsigned long mem_entries;
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unsigned long buffer;
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int i;
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lb_size = (unsigned long)(&_eram_seg - &_ram_seg);
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/* Double coreboot size so I have somewhere to place a copy to return to */
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lb_size = lb_size + lb_size;
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mem_entries = (mem->size - sizeof(*mem))/sizeof(mem->map[0]);
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buffer = 0;
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for(i = 0; i < mem_entries; i++) {
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unsigned long mstart, mend;
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unsigned long msize;
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unsigned long tbuffer;
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if (mem->map[i].type != LB_MEM_RAM)
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continue;
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if (unpack_lb64(mem->map[i].start) > MAX_ADDR)
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continue;
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if (unpack_lb64(mem->map[i].size) < lb_size)
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continue;
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mstart = unpack_lb64(mem->map[i].start);
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msize = MAX_ADDR - mstart +1;
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if (msize > unpack_lb64(mem->map[i].size))
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msize = unpack_lb64(mem->map[i].size);
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mend = mstart + msize;
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tbuffer = mend - lb_size;
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if (tbuffer < buffer)
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continue;
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buffer = tbuffer;
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}
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return buffer;
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}
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static int valid_area(struct lb_memory *mem, unsigned long buffer,
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unsigned long start, unsigned long len)
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{
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/* Check through all of the memory segments and ensure
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* the segment that was passed in is completely contained
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* in RAM.
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*/
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int i;
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unsigned long end = start + len;
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unsigned long mem_entries = (mem->size - sizeof(*mem))/sizeof(mem->map[0]);
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/* See if I conflict with the bounce buffer */
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if (end >= buffer) {
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return 0;
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}
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/* Walk through the table of valid memory ranges and see if I
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* have a match.
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*/
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for(i = 0; i < mem_entries; i++) {
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uint64_t mstart, mend;
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uint32_t mtype;
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mtype = mem->map[i].type;
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mstart = unpack_lb64(mem->map[i].start);
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mend = mstart + unpack_lb64(mem->map[i].size);
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if ((mtype == LB_MEM_RAM) && (start < mend) && (end > mstart)) {
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break;
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}
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if ((mtype == LB_MEM_TABLE) && (start < mend) && (end > mstart)) {
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printk_err("Payload is overwriting Coreboot tables.\n");
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break;
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}
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}
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if (i == mem_entries) {
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printk_err("No matching ram area found for range:\n");
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printk_err(" [0x%016lx, 0x%016lx)\n", start, end);
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printk_err("Ram areas\n");
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for(i = 0; i < mem_entries; i++) {
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uint64_t mstart, mend;
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uint32_t mtype;
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mtype = mem->map[i].type;
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mstart = unpack_lb64(mem->map[i].start);
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mend = mstart + unpack_lb64(mem->map[i].size);
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printk_err(" [0x%016lx, 0x%016lx) %s\n",
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(unsigned long)mstart,
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(unsigned long)mend,
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(mtype == LB_MEM_RAM)?"RAM":"Reserved");
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}
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return 0;
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}
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return 1;
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}
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static void relocate_segment(unsigned long buffer, struct segment *seg)
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{
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/* Modify all segments that want to load onto coreboot
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* to load onto the bounce buffer instead.
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*/
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unsigned long lb_start = (unsigned long)&_ram_seg;
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unsigned long lb_end = (unsigned long)&_eram_seg;
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unsigned long start, middle, end;
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printk_spew("lb: [0x%016lx, 0x%016lx)\n",
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lb_start, lb_end);
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start = seg->s_dstaddr;
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middle = start + seg->s_filesz;
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end = start + seg->s_memsz;
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/* I don't conflict with coreboot so get out of here */
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if ((end <= lb_start) || (start >= lb_end))
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return;
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printk_spew("segment: [0x%016lx, 0x%016lx, 0x%016lx)\n",
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start, middle, end);
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/* Slice off a piece at the beginning
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* that doesn't conflict with coreboot.
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*/
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if (start < lb_start) {
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struct segment *new;
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unsigned long len = lb_start - start;
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new = malloc(sizeof(*new));
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*new = *seg;
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new->s_memsz = len;
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seg->s_memsz -= len;
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seg->s_dstaddr += len;
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seg->s_srcaddr += len;
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if (seg->s_filesz > len) {
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new->s_filesz = len;
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seg->s_filesz -= len;
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} else {
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seg->s_filesz = 0;
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}
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/* Order by stream offset */
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new->next = seg;
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new->prev = seg->prev;
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seg->prev->next = new;
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seg->prev = new;
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/* Order by original program header order */
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new->phdr_next = seg;
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new->phdr_prev = seg->phdr_prev;
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seg->phdr_prev->phdr_next = new;
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seg->phdr_prev = new;
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/* compute the new value of start */
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start = seg->s_dstaddr;
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printk_spew(" early: [0x%016lx, 0x%016lx, 0x%016lx)\n",
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new->s_dstaddr,
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new->s_dstaddr + new->s_filesz,
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new->s_dstaddr + new->s_memsz);
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}
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/* Slice off a piece at the end
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* that doesn't conflict with coreboot
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*/
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if (end > lb_end) {
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unsigned long len = lb_end - start;
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struct segment *new;
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new = malloc(sizeof(*new));
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*new = *seg;
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seg->s_memsz = len;
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new->s_memsz -= len;
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new->s_dstaddr += len;
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new->s_srcaddr += len;
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if (seg->s_filesz > len) {
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seg->s_filesz = len;
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new->s_filesz -= len;
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} else {
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new->s_filesz = 0;
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}
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/* Order by stream offset */
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new->next = seg->next;
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new->prev = seg;
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seg->next->prev = new;
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seg->next = new;
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/* Order by original program header order */
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new->phdr_next = seg->phdr_next;
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new->phdr_prev = seg;
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seg->phdr_next->phdr_prev = new;
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seg->phdr_next = new;
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/* compute the new value of end */
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end = start + len;
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printk_spew(" late: [0x%016lx, 0x%016lx, 0x%016lx)\n",
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new->s_dstaddr,
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new->s_dstaddr + new->s_filesz,
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new->s_dstaddr + new->s_memsz);
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}
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/* Now retarget this segment onto the bounce buffer */
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/* sort of explanation: the buffer is a 1:1 mapping to coreboot.
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* so you will make the dstaddr be this buffer, and it will get copied
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* later to where coreboot lives.
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*/
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seg->s_dstaddr = buffer + (seg->s_dstaddr - lb_start);
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printk_spew(" bounce: [0x%016lx, 0x%016lx, 0x%016lx)\n",
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seg->s_dstaddr,
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seg->s_dstaddr + seg->s_filesz,
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seg->s_dstaddr + seg->s_memsz);
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}
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static int build_self_segment_list(
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struct segment *head,
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unsigned long bounce_buffer, struct lb_memory *mem,
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struct romfs_payload *payload, u32 *entry)
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{
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struct segment *new;
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struct segment *ptr;
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u8 *data;
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int datasize;
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struct romfs_payload_segment *segment, *first_segment;
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memset(head, 0, sizeof(*head));
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head->phdr_next = head->phdr_prev = head;
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head->next = head->prev = head;
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first_segment = segment = &payload->segments;
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while(1) {
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printk_debug("Segment %p\n", segment);
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switch(segment->type) {
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default: printk_emerg("Bad segment type %x\n", segment->type);
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return -1;
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case PAYLOAD_SEGMENT_PARAMS:
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printk_info("found param section\n");
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segment++;
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continue;
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case PAYLOAD_SEGMENT_CODE:
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case PAYLOAD_SEGMENT_DATA:
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printk_info( "%s: ", segment->type == PAYLOAD_SEGMENT_CODE ?
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"code" : "data");
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new = malloc(sizeof(*new));
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new->s_dstaddr = ntohl((u32) segment->load_addr);
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new->s_memsz = ntohl(segment->mem_len);
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datasize = ntohl(segment->len);
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/* figure out decompression, do it, get pointer to the area */
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if (romfs_self_decompress(ntohl(segment->compression),
|
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((unsigned char *) first_segment) +
|
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ntohl(segment->offset), new)) {
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printk_emerg("romfs_self_decompress failed\n");
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return;
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}
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printk_debug("New segment dstaddr 0x%lx memsize 0x%lx srcaddr 0x%lx filesize 0x%lx\n",
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new->s_dstaddr, new->s_memsz, new->s_srcaddr, new->s_filesz);
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/* Clean up the values */
|
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if (new->s_filesz > new->s_memsz) {
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new->s_filesz = new->s_memsz;
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}
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printk_debug("(cleaned up) New segment addr 0x%lx size 0x%lx offset 0x%lx filesize 0x%lx\n",
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new->s_dstaddr, new->s_memsz, new->s_srcaddr, new->s_filesz);
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break;
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case PAYLOAD_SEGMENT_BSS:
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printk_info("BSS %p/%d\n", (void *) ntohl((u32) segment->load_addr),
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ntohl(segment->mem_len));
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new = malloc(sizeof(*new));
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new->s_filesz = 0;
|
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new->s_dstaddr = ntohl((u32) segment->load_addr);
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new->s_memsz = ntohl(segment->mem_len);
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break;
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case PAYLOAD_SEGMENT_ENTRY:
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printk_info("Entry %p\n", (void *) ntohl((u32) segment->load_addr));
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*entry = (void *) ntohl((u32) segment->load_addr);
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return 1;
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}
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segment++;
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for(ptr = head->next; ptr != head; ptr = ptr->next) {
|
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if (new->s_srcaddr < ntohl((u32) segment->load_addr))
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break;
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}
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/* Order by stream offset */
|
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new->next = ptr;
|
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new->prev = ptr->prev;
|
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ptr->prev->next = new;
|
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ptr->prev = new;
|
||||
/* Order by original program header order */
|
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new->phdr_next = head;
|
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new->phdr_prev = head->phdr_prev;
|
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head->phdr_prev->phdr_next = new;
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head->phdr_prev = new;
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|
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/* Verify the memory addresses in the segment are valid */
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if (!valid_area(mem, bounce_buffer, new->s_dstaddr, new->s_memsz))
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goto out;
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/* Modify the segment to load onto the bounce_buffer if necessary.
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*/
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relocate_segment(bounce_buffer, new);
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}
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return 1;
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out:
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return 0;
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}
|
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|
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static int load_self_segments(
|
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struct segment *head, struct romfs_payload *payload)
|
||||
{
|
||||
unsigned long offset;
|
||||
struct segment *ptr;
|
||||
|
||||
offset = 0;
|
||||
for(ptr = head->next; ptr != head; ptr = ptr->next) {
|
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unsigned long skip_bytes, read_bytes;
|
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unsigned char *dest, *middle, *end, *src;
|
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byte_offset_t result;
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printk_debug("Loading Segment: addr: 0x%016lx memsz: 0x%016lx filesz: 0x%016lx\n",
|
||||
ptr->s_dstaddr, ptr->s_memsz, ptr->s_filesz);
|
||||
|
||||
/* Compute the boundaries of the segment */
|
||||
dest = (unsigned char *)(ptr->s_dstaddr);
|
||||
end = dest + ptr->s_memsz;
|
||||
middle = dest + ptr->s_filesz;
|
||||
src = ptr->s_srcaddr;
|
||||
printk_spew("[ 0x%016lx, %016lx, 0x%016lx) <- %016lx\n",
|
||||
(unsigned long)dest,
|
||||
(unsigned long)middle,
|
||||
(unsigned long)end,
|
||||
(unsigned long)src);
|
||||
|
||||
/* Copy data from the initial buffer */
|
||||
if (ptr->s_filesz) {
|
||||
size_t len;
|
||||
len = ptr->s_filesz;
|
||||
memcpy(dest, src, len);
|
||||
dest += len;
|
||||
}
|
||||
|
||||
/* Zero the extra bytes between middle & end */
|
||||
if (middle < end) {
|
||||
printk_debug("Clearing Segment: addr: 0x%016lx memsz: 0x%016lx\n",
|
||||
(unsigned long)middle, (unsigned long)(end - middle));
|
||||
|
||||
/* Zero the extra bytes */
|
||||
memset(middle, 0, end - middle);
|
||||
}
|
||||
}
|
||||
return 1;
|
||||
out:
|
||||
return 0;
|
||||
}
|
||||
|
||||
int selfboot(struct lb_memory *mem, struct romfs_payload *payload)
|
||||
{
|
||||
void *entry;
|
||||
struct segment head;
|
||||
unsigned long bounce_buffer;
|
||||
|
||||
/* Find a bounce buffer so I can load to coreboot's current location */
|
||||
bounce_buffer = get_bounce_buffer(mem);
|
||||
if (!bounce_buffer) {
|
||||
printk_err("Could not find a bounce buffer...\n");
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* Preprocess the self segments */
|
||||
if (!build_self_segment_list(&head, bounce_buffer, mem, payload, &entry))
|
||||
goto out;
|
||||
|
||||
/* Load the segments */
|
||||
if (!load_self_segments(&head, payload))
|
||||
goto out;
|
||||
|
||||
printk_spew("Loaded segments\n");
|
||||
|
||||
/* Reset to booting from this image as late as possible */
|
||||
boot_successful();
|
||||
|
||||
printk_debug("Jumping to boot code at %p\n", entry);
|
||||
post_code(0xfe);
|
||||
|
||||
/* Jump to kernel */
|
||||
jmp_to_elf_entry(entry, bounce_buffer);
|
||||
return 1;
|
||||
|
||||
out:
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
@ -27,3 +27,7 @@ if CONFIG_USE_INIT
|
|||
initobject memcpy.o
|
||||
initobject memcmp.o
|
||||
end
|
||||
|
||||
if CONFIG_ROMFS
|
||||
object romfs.o
|
||||
end
|
||||
|
|
|
|||
|
|
@ -0,0 +1,234 @@
|
|||
/*
|
||||
* This file is part of the coreboot project.
|
||||
*
|
||||
* Copyright (C) 2008, Jordan Crouse <jordan@cosmicpenguin.net>
|
||||
*
|
||||
* 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.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
|
||||
*/
|
||||
|
||||
#include <types.h>
|
||||
#include <string.h>
|
||||
#include <console/console.h>
|
||||
#include <boot/coreboot_tables.h>
|
||||
#include <romfs.h>
|
||||
|
||||
#ifndef CONFIG_BIG_ENDIAN
|
||||
#define ntohl(x) ( ((x&0xff)<<24) | ((x&0xff00)<<8) | \
|
||||
((x&0xff0000) >> 8) | ((x&0xff000000) >> 24) )
|
||||
#else
|
||||
#define ntohl(x) (x)
|
||||
#endif
|
||||
|
||||
int run_address(void *f);
|
||||
|
||||
int romfs_decompress(int algo, void *src, void *dst, int len)
|
||||
{
|
||||
switch(algo) {
|
||||
case ROMFS_COMPRESS_NONE:
|
||||
memcpy(dst, src, len);
|
||||
return 0;
|
||||
|
||||
#ifdef CONFIG_COMPRESSION_LZMA
|
||||
|
||||
case ROMFS_COMPRESS_LZMA: {
|
||||
unsigned long ulzma(unsigned char *src, unsigned char *dst);
|
||||
ulzma(src, dst);
|
||||
}
|
||||
return 0;
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_COMPRESSION_NRV2B
|
||||
case ROMFS_COMPRESS_NRV2B: {
|
||||
unsigned long unrv2b(u8 *src, u8 *dst, unsigned long *ilen_p);
|
||||
unsigned long tmp;
|
||||
|
||||
unrv2b(src, dst, &tmp);
|
||||
}
|
||||
return 0;
|
||||
#endif
|
||||
default:
|
||||
printk_info( "ROMFS: Unknown compression type %d\n",
|
||||
algo);
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
int romfs_check_magic(struct romfs_file *file)
|
||||
{
|
||||
return !strcmp(file->magic, ROMFS_FILE_MAGIC) ? 1 : 0;
|
||||
}
|
||||
|
||||
struct romfs_header *romfs_master_header(void)
|
||||
{
|
||||
struct romfs_header *header;
|
||||
|
||||
unsigned long ptr = *((unsigned long *) ROMFS_HEADPTR_ADDR);
|
||||
printk_debug("Check ROMFS header at %p\n", ptr);
|
||||
header = (struct romfs_header *) ptr;
|
||||
|
||||
printk_debug("magic is %08x\n", ntohl(header->magic));
|
||||
if (ntohl(header->magic) != ROMFS_HEADER_MAGIC) {
|
||||
printk_err("NO ROMFS HEADER\n");
|
||||
return NULL;
|
||||
}
|
||||
|
||||
printk_debug("Found ROMFS header at %p\n", ptr);
|
||||
return header;
|
||||
}
|
||||
|
||||
struct romfs_file *romfs_find(const char *name)
|
||||
{
|
||||
struct romfs_header *header = romfs_master_header();
|
||||
unsigned long offset;
|
||||
|
||||
if (header == NULL)
|
||||
return NULL;
|
||||
offset = 0 - ntohl(header->romsize) + ntohl(header->offset);
|
||||
|
||||
while(1) {
|
||||
struct romfs_file *file = (struct romfs_file *) offset;
|
||||
if (romfs_check_magic(file)) printk_info("Check %s\n", ROMFS_NAME(file));
|
||||
if (romfs_check_magic(file) &&
|
||||
!strcmp(ROMFS_NAME(file), name))
|
||||
return file;
|
||||
|
||||
offset += ntohl(header->align);
|
||||
|
||||
if (offset < 0xFFFFFFFF - ntohl(header->romsize))
|
||||
return NULL;
|
||||
}
|
||||
}
|
||||
|
||||
struct romfs_stage *romfs_find_file(const char *name, int type)
|
||||
{
|
||||
struct romfs_file *file = romfs_find(name);
|
||||
|
||||
if (file == NULL) {
|
||||
printk_info( "ROMFS: Could not find file %s\n",
|
||||
name);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
if (ntohl(file->type) != type) {
|
||||
printk_info( "ROMFS: File %s is of type %x instead of"
|
||||
"type %x\n", name, file->type, type);
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
return (void *) ROMFS_SUBHEADER(file);
|
||||
}
|
||||
|
||||
int romfs_load_optionrom(const char *name, u32 dest)
|
||||
{
|
||||
struct romfs_optionrom *orom = (struct romfs_optionrom *)
|
||||
romfs_find_file(name, ROMFS_TYPE_OPTIONROM);
|
||||
|
||||
if (orom == NULL)
|
||||
return -1;
|
||||
|
||||
if (romfs_decompress(ntohl(orom->compression),
|
||||
((unsigned char *) orom) +
|
||||
sizeof(struct romfs_optionrom),
|
||||
(void *) dest,
|
||||
ntohl(orom->len)))
|
||||
return -1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
void * romfs_load_payload(struct lb_memory *lb_mem, const char *name)
|
||||
{
|
||||
int selfboot(struct lb_memory *mem, struct romfs_payload *payload);
|
||||
struct romfs_payload *payload = (struct romfs_payload *)
|
||||
romfs_find_file(name, ROMFS_TYPE_PAYLOAD);
|
||||
|
||||
struct romfs_payload_segment *segment, *first_segment;
|
||||
|
||||
if (payload == NULL)
|
||||
return (void *) -1;
|
||||
printk_debug("Got a payload\n");
|
||||
first_segment = segment = &payload->segments;
|
||||
selfboot(lb_mem, payload);
|
||||
printk_emerg("SELFBOOT RETURNED!\n");
|
||||
|
||||
return (void *) -1;
|
||||
}
|
||||
|
||||
void * romfs_load_stage(const char *name)
|
||||
{
|
||||
struct romfs_stage *stage = (struct romfs_stage *)
|
||||
romfs_find_file(name, ROMFS_TYPE_STAGE);
|
||||
/* this is a mess. There is no ntohll. */
|
||||
/* for now, assume compatible byte order until we solve this. */
|
||||
u32 entry;
|
||||
|
||||
if (stage == NULL)
|
||||
return (void *) -1;
|
||||
|
||||
printk_info("Stage: load @ %d/%d bytes, enter @ %llx\n",
|
||||
ntohl((u32) stage->load), ntohl(stage->memlen),
|
||||
stage->entry);
|
||||
memset((void *) ntohl((u32) stage->load), 0, ntohl(stage->memlen));
|
||||
|
||||
if (romfs_decompress(ntohl(stage->compression),
|
||||
((unsigned char *) stage) +
|
||||
sizeof(struct romfs_stage),
|
||||
(void *) ntohl((u32) stage->load),
|
||||
ntohl(stage->len)))
|
||||
return (void *) -1;
|
||||
|
||||
entry = stage->entry;
|
||||
// return (void *) ntohl((u32) stage->entry);
|
||||
return (void *) entry;
|
||||
}
|
||||
|
||||
void * romfs_get_file(const char *name)
|
||||
{
|
||||
return romfs_find(name);
|
||||
}
|
||||
|
||||
int romfs_execute_stage(const char *name)
|
||||
{
|
||||
struct romfs_stage *stage = (struct romfs_stage *)
|
||||
romfs_find_file(name, ROMFS_TYPE_STAGE);
|
||||
|
||||
if (stage == NULL)
|
||||
return 1;
|
||||
|
||||
if (ntohl(stage->compression) != ROMFS_COMPRESS_NONE) {
|
||||
printk_info( "ROMFS: Unable to run %s: Compressed file"
|
||||
"Not supported for in-place execution\n", name);
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* FIXME: This isn't right */
|
||||
printk_info( "ROMFS: run @ %p\n", (void *) ntohl((u32) stage->entry));
|
||||
return run_address((void *) ntohl((u32) stage->entry));
|
||||
}
|
||||
|
||||
/**
|
||||
* * run_address is passed the address of a function taking no parameters and
|
||||
* * jumps to it, returning the result.
|
||||
* * @param f the address to call as a function.
|
||||
* * returns value returned by the function.
|
||||
* */
|
||||
|
||||
int run_address(void *f)
|
||||
{
|
||||
int (*v) (void);
|
||||
v = f;
|
||||
return v();
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue