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authorStefan Reinauer <reinauer@chromium.org>2012-11-30 12:23:45 -0800
committerStefan Reinauer <stefan.reinauer@coreboot.org>2012-11-30 21:56:33 +0100
commit1e753294c4c7bbc825a413ab62c47878104f984f (patch)
treeb6096874eed22aa72c28f7a3bdf057b16d513e8a /src/boot/selfboot.c
parent179206a1acb1659ffe018378494abc269771e9dd (diff)
Drop boot directory
It only has two files, move them to src/lib Change-Id: I17943db4c455aa3a934db1cf56e56e89c009679f Signed-off-by: Stefan Reinauer <reinauer@google.com> Reviewed-on: http://review.coreboot.org/1959 Reviewed-by: Ronald G. Minnich <rminnich@gmail.com> Tested-by: build bot (Jenkins)
Diffstat (limited to 'src/boot/selfboot.c')
-rw-r--r--src/boot/selfboot.c543
1 files changed, 0 insertions, 543 deletions
diff --git a/src/boot/selfboot.c b/src/boot/selfboot.c
deleted file mode 100644
index 2556a14d6e..0000000000
--- a/src/boot/selfboot.c
+++ /dev/null
@@ -1,543 +0,0 @@
-/*
- * This file is part of the coreboot project.
- *
- * Copyright (C) 2003 Eric W. Biederman <ebiederm@xmission.com>
- * Copyright (C) 2009 Ron Minnich <rminnich@gmail.com>
- *
- * 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 <arch/byteorder.h>
-#include <console/console.h>
-#include <fallback.h>
-#include <boot/elf.h>
-#include <boot/elf_boot.h>
-#include <boot/coreboot_tables.h>
-#include <stdint.h>
-#include <stdlib.h>
-#include <string.h>
-#include <cbfs.h>
-#include <lib.h>
-#if CONFIG_COLLECT_TIMESTAMPS
-#include <timestamp.h>
-#endif
-
-/* Maximum physical address we can use for the coreboot bounce buffer. */
-#ifndef MAX_ADDR
-#define MAX_ADDR -1UL
-#endif
-
-/* from coreboot_ram.ld: */
-extern unsigned char _ram_seg;
-extern unsigned char _eram_seg;
-
-static const unsigned long lb_start = (unsigned long)&_ram_seg;
-static const unsigned long lb_end = (unsigned long)&_eram_seg;
-
-struct segment {
- struct segment *next;
- struct segment *prev;
- unsigned long s_dstaddr;
- unsigned long s_srcaddr;
- unsigned long s_memsz;
- unsigned long s_filesz;
- int compression;
-};
-
-/* The problem:
- * Static executables all want to share the same addresses
- * in memory because only a few addresses are reliably present on
- * a machine, and implementing general relocation is hard.
- *
- * The solution:
- * - Allocate a buffer the size of the coreboot image plus additional
- * required space.
- * - Anything that would overwrite coreboot copy into the lower part of
- * the buffer.
- * - After loading an ELF image copy coreboot to the top of the buffer.
- * - Then jump to the loaded image.
- *
- * Benefits:
- * - Nearly arbitrary standalone executables can be loaded.
- * - Coreboot is preserved, so it can be returned to.
- * - The implementation is still relatively simple,
- * and much simpler than the general case implemented in kexec.
- */
-
-static unsigned long bounce_size, bounce_buffer;
-
-static void get_bounce_buffer(struct lb_memory *mem, unsigned long req_size)
-{
- unsigned long lb_size;
- unsigned long mem_entries;
- unsigned long buffer;
- int i;
- lb_size = lb_end - lb_start;
- /* Plus coreboot size so I have somewhere
- * to place a copy to return to.
- */
- lb_size = req_size + lb_size;
- mem_entries = (mem->size - sizeof(*mem)) / sizeof(mem->map[0]);
- buffer = 0;
- for(i = 0; i < mem_entries; i++) {
- unsigned long mstart, mend;
- unsigned long msize;
- unsigned long tbuffer;
- if (mem->map[i].type != LB_MEM_RAM)
- continue;
- if (unpack_lb64(mem->map[i].start) > MAX_ADDR)
- continue;
- if (unpack_lb64(mem->map[i].size) < lb_size)
- continue;
- mstart = unpack_lb64(mem->map[i].start);
- msize = MAX_ADDR - mstart +1;
- if (msize > unpack_lb64(mem->map[i].size))
- msize = unpack_lb64(mem->map[i].size);
- mend = mstart + msize;
- tbuffer = mend - lb_size;
- if (tbuffer < buffer)
- continue;
- buffer = tbuffer;
- }
- bounce_buffer = buffer;
- bounce_size = req_size;
-}
-
-static int valid_area(struct lb_memory *mem, unsigned long buffer,
- unsigned long start, unsigned long len)
-{
- /* Check through all of the memory segments and ensure
- * the segment that was passed in is completely contained
- * in RAM.
- */
- int i;
- unsigned long end = start + len;
- unsigned long mem_entries = (mem->size - sizeof(*mem)) /
- sizeof(mem->map[0]);
-
- /* See if I conflict with the bounce buffer */
- if (end >= buffer) {
- return 0;
- }
-
- /* Walk through the table of valid memory ranges and see if I
- * have a match.
- */
- for(i = 0; i < mem_entries; i++) {
- uint64_t mstart, mend;
- uint32_t mtype;
- mtype = mem->map[i].type;
- mstart = unpack_lb64(mem->map[i].start);
- mend = mstart + unpack_lb64(mem->map[i].size);
- if ((mtype == LB_MEM_RAM) && (start >= mstart) && (end < mend)) {
- break;
- }
- if ((mtype == LB_MEM_TABLE) && (start >= mstart) && (end < mend)) {
- printk(BIOS_ERR, "Payload is overwriting coreboot tables.\n");
- break;
- }
- }
- if (i == mem_entries) {
- if (start < (1024*1024) && end <=(1024*1024)) {
- printk(BIOS_DEBUG, "Payload (probably SeaBIOS) loaded"
- " into a reserved area in the lower 1MB\n");
- return 1;
- }
- printk(BIOS_ERR, "No matching ram area found for range:\n");
- printk(BIOS_ERR, " [0x%016lx, 0x%016lx)\n", start, end);
- printk(BIOS_ERR, "Ram areas\n");
- for(i = 0; i < mem_entries; i++) {
- uint64_t mstart, mend;
- uint32_t mtype;
- mtype = mem->map[i].type;
- mstart = unpack_lb64(mem->map[i].start);
- mend = mstart + unpack_lb64(mem->map[i].size);
- printk(BIOS_ERR, " [0x%016lx, 0x%016lx) %s\n",
- (unsigned long)mstart,
- (unsigned long)mend,
- (mtype == LB_MEM_RAM)?"RAM":"Reserved");
-
- }
- return 0;
- }
- return 1;
-}
-
-
-static int overlaps_coreboot(struct segment *seg)
-{
- unsigned long start, end;
- start = seg->s_dstaddr;
- end = start + seg->s_memsz;
- return !((end <= lb_start) || (start >= lb_end));
-}
-
-static int relocate_segment(unsigned long buffer, struct segment *seg)
-{
- /* Modify all segments that want to load onto coreboot
- * to load onto the bounce buffer instead.
- */
- /* ret: 1 : A new segment is inserted before the seg.
- * 0 : A new segment is inserted after the seg, or no new one.
- */
- unsigned long start, middle, end, ret = 0;
-
- printk(BIOS_SPEW, "lb: [0x%016lx, 0x%016lx)\n",
- lb_start, lb_end);
-
- /* I don't conflict with coreboot so get out of here */
- if (!overlaps_coreboot(seg))
- return 0;
-
- start = seg->s_dstaddr;
- middle = start + seg->s_filesz;
- end = start + seg->s_memsz;
-
- printk(BIOS_SPEW, "segment: [0x%016lx, 0x%016lx, 0x%016lx)\n",
- start, middle, end);
-
- if (seg->compression == CBFS_COMPRESS_NONE) {
- /* Slice off a piece at the beginning
- * that doesn't conflict with coreboot.
- */
- if (start < lb_start) {
- struct segment *new;
- unsigned long len = lb_start - start;
- new = malloc(sizeof(*new));
- *new = *seg;
- new->s_memsz = len;
- seg->s_memsz -= len;
- seg->s_dstaddr += len;
- seg->s_srcaddr += len;
- if (seg->s_filesz > len) {
- new->s_filesz = len;
- seg->s_filesz -= len;
- } else {
- seg->s_filesz = 0;
- }
-
- /* Order by stream offset */
- new->next = seg;
- new->prev = seg->prev;
- seg->prev->next = new;
- seg->prev = new;
-
- /* compute the new value of start */
- start = seg->s_dstaddr;
-
- printk(BIOS_SPEW, " early: [0x%016lx, 0x%016lx, 0x%016lx)\n",
- new->s_dstaddr,
- new->s_dstaddr + new->s_filesz,
- new->s_dstaddr + new->s_memsz);
-
- ret = 1;
- }
-
- /* Slice off a piece at the end
- * that doesn't conflict with coreboot
- */
- if (end > lb_end) {
- unsigned long len = lb_end - start;
- struct segment *new;
- new = malloc(sizeof(*new));
- *new = *seg;
- seg->s_memsz = len;
- new->s_memsz -= len;
- new->s_dstaddr += len;
- new->s_srcaddr += len;
- if (seg->s_filesz > len) {
- seg->s_filesz = len;
- new->s_filesz -= len;
- } else {
- new->s_filesz = 0;
- }
- /* Order by stream offset */
- new->next = seg->next;
- new->prev = seg;
- seg->next->prev = new;
- seg->next = new;
-
- printk(BIOS_SPEW, " late: [0x%016lx, 0x%016lx, 0x%016lx)\n",
- new->s_dstaddr,
- new->s_dstaddr + new->s_filesz,
- new->s_dstaddr + new->s_memsz);
- }
- }
-
- /* Now retarget this segment onto the bounce buffer */
- /* sort of explanation: the buffer is a 1:1 mapping to coreboot.
- * so you will make the dstaddr be this buffer, and it will get copied
- * later to where coreboot lives.
- */
- seg->s_dstaddr = buffer + (seg->s_dstaddr - lb_start);
-
- printk(BIOS_SPEW, " bounce: [0x%016lx, 0x%016lx, 0x%016lx)\n",
- seg->s_dstaddr,
- seg->s_dstaddr + seg->s_filesz,
- seg->s_dstaddr + seg->s_memsz);
-
- return ret;
-}
-
-
-static int build_self_segment_list(
- struct segment *head,
- struct lb_memory *mem,
- struct cbfs_payload *payload, u32 *entry)
-{
- struct segment *new;
- struct segment *ptr;
- struct cbfs_payload_segment *segment, *first_segment;
- memset(head, 0, sizeof(*head));
- head->next = head->prev = head;
- first_segment = segment = &payload->segments;
-
- while(1) {
- printk(BIOS_DEBUG, "Loading segment from rom address 0x%p\n", segment);
- switch(segment->type) {
- case PAYLOAD_SEGMENT_PARAMS:
- printk(BIOS_DEBUG, " parameter section (skipped)\n");
- segment++;
- continue;
-
- case PAYLOAD_SEGMENT_CODE:
- case PAYLOAD_SEGMENT_DATA:
- printk(BIOS_DEBUG, " %s (compression=%x)\n",
- segment->type == PAYLOAD_SEGMENT_CODE ? "code" : "data",
- ntohl(segment->compression));
- new = malloc(sizeof(*new));
- new->s_dstaddr = ntohll(segment->load_addr);
- new->s_memsz = ntohl(segment->mem_len);
- new->compression = ntohl(segment->compression);
-
- new->s_srcaddr = (u32) ((unsigned char *)first_segment)
- + ntohl(segment->offset);
- new->s_filesz = ntohl(segment->len);
- printk(BIOS_DEBUG, " New segment dstaddr 0x%lx memsize 0x%lx srcaddr 0x%lx filesize 0x%lx\n",
- new->s_dstaddr, new->s_memsz, new->s_srcaddr, new->s_filesz);
- /* Clean up the values */
- if (new->s_filesz > new->s_memsz) {
- new->s_filesz = new->s_memsz;
- }
- printk(BIOS_DEBUG, " (cleaned up) New segment addr 0x%lx size 0x%lx offset 0x%lx filesize 0x%lx\n",
- new->s_dstaddr, new->s_memsz, new->s_srcaddr, new->s_filesz);
- break;
-
- case PAYLOAD_SEGMENT_BSS:
- printk(BIOS_DEBUG, " BSS 0x%p (%d byte)\n", (void *)
- (intptr_t)ntohll(segment->load_addr),
- ntohl(segment->mem_len));
- new = malloc(sizeof(*new));
- new->s_filesz = 0;
- new->s_dstaddr = ntohll(segment->load_addr);
- new->s_memsz = ntohl(segment->mem_len);
- break;
-
- case PAYLOAD_SEGMENT_ENTRY:
- printk(BIOS_DEBUG, " Entry Point 0x%p\n", (void *) ntohl((u32) segment->load_addr));
- *entry = ntohll(segment->load_addr);
- /* Per definition, a payload always has the entry point
- * as last segment. Thus, we use the occurence of the
- * entry point as break condition for the loop.
- * Can we actually just look at the number of section?
- */
- return 1;
-
- default:
- /* We found something that we don't know about. Throw
- * hands into the sky and run away!
- */
- printk(BIOS_EMERG, "Bad segment type %x\n", segment->type);
- return -1;
- }
-
- /* We have found another CODE, DATA or BSS segment */
- segment++;
-
- /* Find place where to insert our segment */
- for(ptr = head->next; ptr != head; ptr = ptr->next) {
- if (new->s_srcaddr < ntohll(segment->load_addr))
- break;
- }
-
- /* Order by stream offset */
- new->next = ptr;
- new->prev = ptr->prev;
- ptr->prev->next = new;
- ptr->prev = new;
- }
-
- return 1;
-}
-
-static int load_self_segments(
- struct segment *head,
- struct lb_memory *mem,
- struct cbfs_payload *payload)
-{
- struct segment *ptr;
-
- unsigned long bounce_high = lb_end;
- for(ptr = head->next; ptr != head; ptr = ptr->next) {
- if (!overlaps_coreboot(ptr))
- continue;
- if (ptr->s_dstaddr + ptr->s_memsz > bounce_high)
- bounce_high = ptr->s_dstaddr + ptr->s_memsz;
- }
- get_bounce_buffer(mem, bounce_high - lb_start);
- if (!bounce_buffer) {
- printk(BIOS_ERR, "Could not find a bounce buffer...\n");
- return 0;
- }
- for(ptr = head->next; ptr != head; ptr = ptr->next) {
- /* Verify the memory addresses in the segment are valid */
- if (!valid_area(mem, bounce_buffer, ptr->s_dstaddr, ptr->s_memsz))
- return 0;
- }
- for(ptr = head->next; ptr != head; ptr = ptr->next) {
- unsigned char *dest, *src;
- printk(BIOS_DEBUG, "Loading Segment: addr: 0x%016lx memsz: 0x%016lx filesz: 0x%016lx\n",
- ptr->s_dstaddr, ptr->s_memsz, ptr->s_filesz);
-
- /* Modify the segment to load onto the bounce_buffer if necessary.
- */
- if (relocate_segment(bounce_buffer, ptr)) {
- ptr = (ptr->prev)->prev;
- continue;
- }
-
- printk(BIOS_DEBUG, "Post relocation: 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);
- src = (unsigned char *)(ptr->s_srcaddr);
-
- /* Copy data from the initial buffer */
- if (ptr->s_filesz) {
- unsigned char *middle, *end;
- size_t len;
- len = ptr->s_filesz;
- switch(ptr->compression) {
- case CBFS_COMPRESS_LZMA: {
- printk(BIOS_DEBUG, "using LZMA\n");
- len = ulzma(src, dest);
- if (!len) /* Decompression Error. */
- return 0;
- break;
- }
-#if CONFIG_COMPRESSED_PAYLOAD_NRV2B
- case CBFS_COMPRESS_NRV2B: {
- printk(BIOS_DEBUG, "using NRV2B\n");
- unsigned long unrv2b(u8 *src, u8 *dst, unsigned long *ilen_p);
- unsigned long tmp;
- len = unrv2b(src, dest, &tmp);
- break;
- }
-#endif
- case CBFS_COMPRESS_NONE: {
- printk(BIOS_DEBUG, "it's not compressed!\n");
- memcpy(dest, src, len);
- break;
- }
- default:
- printk(BIOS_INFO, "CBFS: Unknown compression type %d\n", ptr->compression);
- return -1;
- }
- end = dest + ptr->s_memsz;
- middle = dest + len;
- printk(BIOS_SPEW, "[ 0x%08lx, %08lx, 0x%08lx) <- %08lx\n",
- (unsigned long)dest,
- (unsigned long)middle,
- (unsigned long)end,
- (unsigned long)src);
-
- /* Zero the extra bytes between middle & end */
- if (middle < end) {
- printk(BIOS_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);
- }
- /* Copy the data that's outside the area that shadows coreboot_ram */
- printk(BIOS_DEBUG, "dest %p, end %p, bouncebuffer %lx\n", dest, end, bounce_buffer);
- if ((unsigned long)end > bounce_buffer) {
- if ((unsigned long)dest < bounce_buffer) {
- unsigned char *from = dest;
- unsigned char *to = (unsigned char*)(lb_start-(bounce_buffer-(unsigned long)dest));
- unsigned long amount = bounce_buffer-(unsigned long)dest;
- printk(BIOS_DEBUG, "move prefix around: from %p, to %p, amount: %lx\n", from, to, amount);
- memcpy(to, from, amount);
- }
- if ((unsigned long)end > bounce_buffer + (lb_end - lb_start)) {
- unsigned long from = bounce_buffer + (lb_end - lb_start);
- unsigned long to = lb_end;
- unsigned long amount = (unsigned long)end - from;
- printk(BIOS_DEBUG, "move suffix around: from %lx, to %lx, amount: %lx\n", from, to, amount);
- memcpy((char*)to, (char*)from, amount);
- }
- }
- }
- }
- return 1;
-}
-
-int selfboot(struct lb_memory *mem, struct cbfs_payload *payload)
-{
- u32 entry=0;
- struct segment head;
-
- /* Preprocess the self segments */
- if (!build_self_segment_list(&head, mem, payload, &entry))
- goto out;
-
- /* Load the segments */
- if (!load_self_segments(&head, mem, payload))
- goto out;
-
- printk(BIOS_SPEW, "Loaded segments\n");
-
- /* Reset to booting from this image as late as possible */
- boot_successful();
-
- printk(BIOS_DEBUG, "Jumping to boot code at %x\n", entry);
- post_code(POST_ENTER_ELF_BOOT);
-
-#if CONFIG_COLLECT_TIMESTAMPS
- timestamp_add_now(TS_SELFBOOT_JUMP);
-#endif
-
- /* Before we go off to run the payload, see if
- * we stayed within our bounds.
- */
- checkstack(_estack, 0);
-
- /* Jump to kernel */
- jmp_to_elf_entry((void*)entry, bounce_buffer, bounce_size);
- return 1;
-
-out:
- return 0;
-}
-
-void *cbfs_load_payload(struct lb_memory *lb_mem, const char *name)
-{
- struct cbfs_payload *payload;
-
- payload = (struct cbfs_payload *)cbfs_find_file(name, CBFS_TYPE_PAYLOAD);
-
- return payload;
-}
-