From 1e753294c4c7bbc825a413ab62c47878104f984f Mon Sep 17 00:00:00 2001 From: Stefan Reinauer Date: Fri, 30 Nov 2012 12:23:45 -0800 Subject: Drop boot directory It only has two files, move them to src/lib Change-Id: I17943db4c455aa3a934db1cf56e56e89c009679f Signed-off-by: Stefan Reinauer Reviewed-on: http://review.coreboot.org/1959 Reviewed-by: Ronald G. Minnich Tested-by: build bot (Jenkins) --- src/boot/selfboot.c | 543 ---------------------------------------------------- 1 file changed, 543 deletions(-) delete mode 100644 src/boot/selfboot.c (limited to 'src/boot/selfboot.c') 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 - * Copyright (C) 2009 Ron Minnich - * - * 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 -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#if CONFIG_COLLECT_TIMESTAMPS -#include -#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; -} - -- cgit v1.2.3