sravan/system76-coreboot
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

- Initial checkin of the freebios2 tree

Browse Source 
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@784 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Eric Biederman
2003-04-22 19:02:15 +00:00
parent b138ac83b5
commit 8ca8d7665d
109 changed files with 13965 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

663
src/boot/elfboot.c Normal file
View File

@@ -0,0 +1,663 @@
#include <console/console.h>
#include <part/fallback_boot.h>
#include <boot/elf.h>
#include <boot/elf_boot.h>
#include <boot/linuxbios_tables.h>
#include <ip_checksum.h>
#include <stream/read_bytes.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
/* Maximum physical address we can use for the linuxBIOS bounce buffer.
*/
#ifndef MAX_ADDR
#define MAX_ADDR -1UL
#endif
extern unsigned char _ram_seg;
extern unsigned char _eram_seg;
struct segment {
struct segment *next;
struct segment *prev;
struct segment *phdr_next;
struct segment *phdr_prev;
unsigned long s_addr;
unsigned long s_memsz;
unsigned long s_offset;
unsigned long s_filesz;
};
struct verify_callback {
struct verify_callback *next;
int (*callback)(struct verify_callback *vcb,
Elf_ehdr *ehdr, Elf_phdr *phdr, struct segment *head);
unsigned long desc_offset;
unsigned long desc_addr;
};
struct ip_checksum_vcb {
struct verify_callback data;
unsigned short ip_checksum;
};
int verify_ip_checksum(
struct verify_callback *vcb,
Elf_ehdr *ehdr, Elf_phdr *phdr, struct segment *head)
{
struct ip_checksum_vcb *cb;
struct segment *ptr;
unsigned long bytes;
unsigned long checksum;
unsigned char buff[2], *n_desc;
cb = (struct ip_checksum_vcb *)vcb;
/* zero the checksum so it's value won't
* get in the way of verifying the checksum.
*/
n_desc = 0;
if (vcb->desc_addr) {
n_desc = (unsigned char *)(vcb->desc_addr);
memcpy(buff, n_desc, 2);
memset(n_desc, 0, 2);
}
bytes = 0;
checksum = compute_ip_checksum(ehdr, sizeof(*ehdr));
bytes += sizeof(*ehdr);
checksum = add_ip_checksums(bytes, checksum,
compute_ip_checksum(phdr, ehdr->e_phnum*sizeof(*phdr)));
bytes += ehdr->e_phnum*sizeof(*phdr);
for(ptr = head->phdr_next; ptr != head; ptr = ptr->phdr_next) {
checksum = add_ip_checksums(bytes, checksum,
compute_ip_checksum((void *)ptr->s_addr, ptr->s_memsz));
bytes += ptr->s_memsz;
}
if (n_desc != 0) {
memcpy(n_desc, buff, 2);
}
if (checksum != cb->ip_checksum) {
printk_err("Image checksum: %04x != computed checksum: %04x\n",
cb->ip_checksum, checksum);
}
return checksum == cb->ip_checksum;
}
/* 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 twice the size of the linuxBIOS image.
* - Anything that would overwrite linuxBIOS copy into the lower half of
* the buffer.
* - After loading an ELF image copy linuxBIOS to the upper half of the
* buffer.
* - Then jump to the loaded image.
*
* Benefits:
* - Nearly arbitrary standalone executables can be loaded.
* - LinuxBIOS is preserved, so it can be returned to.
* - The implementation is still relatively simple,
* and much simpler then the general case implemented in kexec.
*
*/
static unsigned long get_bounce_buffer(struct lb_memory *mem)
{
unsigned long lb_size;
unsigned long mem_entries;
unsigned long buffer;
int i;
lb_size = (unsigned long)(&_eram_seg - &_ram_seg);
/* Double linuxBIOS size so I have somewhere to place a copy to return to */
lb_size = lb_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 (mem->map[i].start > MAX_ADDR)
continue;
if (mem->map[i].size < lb_size)
continue;
mstart = mem->map[i].start;
msize = MAX_ADDR - mstart +1;
if (msize > mem->map[i].size)
msize = mem->map[i].size;
mend = mstart + msize;
tbuffer = mend - lb_size;
if (tbuffer < buffer)
continue;
buffer = tbuffer;
}
return buffer;
}
static struct verify_callback *process_elf_notes(
unsigned char *header,
unsigned long offset, unsigned long length)
{
struct verify_callback *cb_chain;
unsigned char *note, *end;
char *program, *version;
cb_chain = 0;
note = header + offset;
end = note + length;
program = version = 0;
while(note < end) {
Elf_Nhdr *hdr;
unsigned char *n_name, *n_desc, *next;
hdr = (Elf_Nhdr *)note;
n_name = note + sizeof(*hdr);
n_desc = n_name + ((hdr->n_namesz + 3) & ~3);
next = n_desc + ((hdr->n_descsz + 3) & ~3);
if (next > end) {
break;
}
if ((hdr->n_namesz == sizeof(ELF_NOTE_BOOT)) &&
(memcmp(n_name, ELF_NOTE_BOOT, sizeof(ELF_NOTE_BOOT)) == 0)) {
switch(hdr->n_type) {
case EIN_PROGRAM_NAME:
if (n_desc[hdr->n_descsz -1] == 0) {
program = n_desc;
}
break;
case EIN_PROGRAM_VERSION:
if (n_desc[hdr->n_descsz -1] == 0) {
version = n_desc;
}
break;
case EIN_PROGRAM_CHECKSUM:
{
struct ip_checksum_vcb *cb;
cb = malloc(sizeof(*cb));
cb->ip_checksum = *((uint16_t *)n_desc);
cb->data.callback = verify_ip_checksum;
cb->data.next = cb_chain;
cb->data.desc_offset = n_desc - header;
cb_chain = &cb->data;
break;
}
}
}
printk_spew("n_type: %08x n_name(%d): %-*.*s n_desc(%d): %-*.*s\n",
hdr->n_type,
hdr->n_namesz, hdr->n_namesz, hdr->n_namesz, n_name,
hdr->n_descsz,hdr->n_descsz, hdr->n_descsz, n_desc);
note = next;
}
if (program && version) {
printk_info("Loading %s version: %s\n",
program, version);
}
return cb_chain;
}
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 = mem->map[i].start;
mend = mstart + mem->map[i].size;
if ((mtype == LB_MEM_RAM) && (start < mend) && (end > mstart)) {
break;
}
}
if (i == mem_entries) {
printk_err("No matching ram area found for range:\n");
printk_err(" [0x%016lx, 0x%016lx)\n", start, end);
printk_err("Ram areas\n");
for(i = 0; i < mem_entries; i++) {
uint64_t mstart, mend;
uint32_t mtype;
mtype = mem->map[i].type;
mstart = mem->map[i].start;
mend = mstart + mem->map[i].size;
printk_err(" [0x%016lx, 0x%016lx) %s\n",
(unsigned long)mstart,
(unsigned long)mend,
(mtype == LB_MEM_RAM)?"RAM":"Reserved");
}
return 0;
}
return 1;
}
static void relocate_segment(unsigned long buffer, struct segment *seg)
{
/* Modify all segments that want to load onto linuxBIOS
* to load onto the bounce buffer instead.
*/
unsigned long lb_start = (unsigned long)&_ram_seg;
unsigned long lb_end = (unsigned long)&_eram_seg;
unsigned long start, middle, end;
printk_spew("lb: [0x%016lx, 0x%016lx)\n",
lb_start, lb_end);
start = seg->s_addr;
middle = start + seg->s_filesz;
end = start + seg->s_memsz;
/* I don't conflict with linuxBIOS so get out of here */
if ((end <= lb_start) || (start >= lb_end))
return;
printk_spew("segment: [0x%016lx, 0x%016lx, 0x%016lx)\n",
start, middle, end);
/* Slice off a piece at the beginning
* that doesn't conflict with linuxBIOS.
*/
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_addr += len;
seg->s_offset += 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;
/* Order by original program header order */
new->phdr_next = seg;
new->phdr_prev = seg->phdr_prev;
seg->phdr_prev->phdr_next = new;
seg->phdr_prev = new;
/* compute the new value of start */
start = seg->s_addr;
printk_spew(" early: [0x%016lx, 0x%016lx, 0x%016lx)\n",
new->s_addr,
new->s_addr + new->s_filesz,
new->s_addr + new->s_memsz);
}
/* Slice off a piece at the end
* that doesn't conflict with linuxBIOS
*/
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_addr += len;
new->s_offset += 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;
/* Order by original program header order */
new->phdr_next = seg->phdr_next;
new->phdr_prev = seg;
seg->phdr_next->phdr_prev = new;
seg->phdr_next = new;
/* compute the new value of end */
end = start + len;
printk_spew(" late: [0x%016lx, 0x%016lx, 0x%016lx)\n",
new->s_addr,
new->s_addr + new->s_filesz,
new->s_addr + new->s_memsz);
}
/* Now retarget this segment onto the bounce buffer */
seg->s_addr = buffer + (seg->s_addr - lb_start);
printk_spew(" bounce: [0x%016lx, 0x%016lx, 0x%016lx)\n",
seg->s_addr,
seg->s_addr + seg->s_filesz,
seg->s_addr + seg->s_memsz);
}
static int build_elf_segment_list(
struct segment *head,
unsigned long bounce_buffer, struct lb_memory *mem,
Elf_phdr *phdr, int headers)
{
struct segment *ptr;
int i;
memset(head, 0, sizeof(*head));
head->next = head->prev = head;
for(i = 0; i < headers; i++) {
struct segment *new;
/* Ignore data that I don't need to handle */
if (phdr[i].p_type != PT_LOAD) {
printk_debug("Dropping non PT_LOAD segment\n");
continue;
}
if (phdr[i].p_memsz == 0) {
printk_debug("Dropping empty segment\n");
continue;
}
new = malloc(sizeof(*new));
new->s_addr = phdr[i].p_paddr;
new->s_memsz = phdr[i].p_memsz;
new->s_offset = phdr[i].p_offset;
new->s_filesz = phdr[i].p_filesz;
printk_debug("New segment addr 0x%lx size 0x%lx offset 0x%lx filesize 0x%lx\n",
new->s_addr, new->s_memsz, new->s_offset, new->s_filesz);
/* Clean up the values */
if (new->s_filesz > new->s_memsz) {
new->s_filesz = new->s_memsz;
}
printk_debug("(cleaned up) New segment addr 0x%lx size 0x%lx offset 0x%lx filesize 0x%lx\n",
new->s_addr, new->s_memsz, new->s_offset, new->s_filesz);
for(ptr = head->next; ptr != head; ptr = ptr->next) {
if (new->s_offset < ptr->s_offset)
break;
}
/* Order by stream offset */
new->next = ptr;
new->prev = ptr->prev;
ptr->prev->next = new;
ptr->prev = new;
/* Order by original program header order */
new->phdr_next = head;
new->phdr_prev = head->phdr_prev;
head->phdr_prev->phdr_next = new;
head->phdr_prev = new;
/* Verify the memory addresses in the segment are valid */
if (!valid_area(mem, bounce_buffer, new->s_addr, new->s_memsz))
goto out;
/* Modify the segment to load onto the bounce_buffer if necessary.
*/
relocate_segment(bounce_buffer, new);
}
return 1;
out:
return 0;
}
static int load_elf_segments(
struct segment *head, unsigned char *header, unsigned long header_size)
{
unsigned long offset;
struct segment *ptr;
offset = 0;
for(ptr = head->next; ptr != head; ptr = ptr->next) {
unsigned long start_offset;
unsigned long skip_bytes, read_bytes;
unsigned char *dest, *middle, *end;
byte_offset_t result;
printk_debug("Loading Segment: addr: 0x%016lx memsz: 0x%016lx filesz: 0x%016lx\n",
ptr->s_addr, ptr->s_memsz, ptr->s_filesz);
/* Compute the boundaries of the segment */
dest = (unsigned char *)(ptr->s_addr);
end = dest + ptr->s_memsz;
middle = dest + ptr->s_filesz;
start_offset = ptr->s_offset;
printk_spew("[ 0x%016lx, %016lx, 0x%016lx) <- %016lx\n",
(unsigned long)dest,
(unsigned long)middle,
(unsigned long)end,
(unsigned long)start_offset);
/* Skip intial buffer unused bytes */
if (offset < header_size) {
if (start_offset < header_size) {
offset = start_offset;
} else {
offset = header_size;
}
}
/* Skip the unused bytes */
skip_bytes = start_offset - offset;
if (skip_bytes &&
((result = stream_skip(skip_bytes)) != skip_bytes)) {
printk_err("ERROR: Skip of %ld bytes skiped %ld bytes\n",
skip_bytes, result);
goto out;
}
offset = start_offset;
/* Copy data from the initial buffer */
if (offset < header_size) {
size_t len;
if ((ptr->s_filesz + start_offset) > header_size) {
len = header_size - start_offset;
}
else {
len = ptr->s_filesz;
}
memcpy(dest, &header[start_offset], len);
dest += len;
}
/* Read the segment into memory */
read_bytes = middle - dest;
if (read_bytes &&
((result = stream_read(dest, read_bytes)) != read_bytes)) {
printk_err("ERROR: Read of %ld bytes read %ld bytes...\n",
read_bytes, result);
goto out;
}
offset += ptr->s_filesz;
/* Zero the extra bytes between middle & end */
if (middle < end) {
printk_debug("Clearing Segment: addr: 0x%016lx memsz: 0x%016lx\n",
(unsigned long)middle, end - middle);
/* Zero the extra bytes */
memset(middle, 0, end - middle);
}
}
return 1;
out:
return 0;
}
static int verify_loaded_image(
struct verify_callback *vcb,
Elf_ehdr *ehdr, Elf_phdr *phdr,
struct segment *head
)
{
struct segment *ptr;
int ok;
ok = 1;
for(; ok && vcb ; vcb = vcb->next) {
/* Find where the note is loaded */
/* The whole note must be loaded intact
* so an address of 0 for the descriptor is impossible
*/
vcb->desc_addr = 0;
for(ptr = head->next; ptr != head; ptr = ptr->next) {
unsigned long desc_addr;
desc_addr = ptr->s_addr + vcb->desc_offset - ptr->s_offset;
if ((desc_addr >= ptr->s_addr) &&
(desc_addr < (ptr->s_addr + ptr->s_filesz))) {
vcb->desc_addr = desc_addr;
}
}
ok = vcb->callback(vcb, ehdr, phdr, head);
}
return ok;
}
int elfload(struct lb_memory *mem,
unsigned char *header, unsigned long header_size)
{
Elf_ehdr *ehdr;
Elf_phdr *phdr;
void *entry;
struct segment head;
struct verify_callback *cb_chain;
unsigned long bounce_buffer;
/* Find a bounce buffer so I can load to linuxBIOS's current location */
bounce_buffer = get_bounce_buffer(mem);
if (!bounce_buffer) {
printk_err("Could not find a bounce buffer...\n");
goto out;
}
ehdr = (Elf_ehdr *)header;
entry = (void *)(ehdr->e_entry);
phdr = (Elf_phdr *)(&header[ehdr->e_phoff]);
/* Digest elf note information... */
cb_chain = 0;
if ((phdr[0].p_type == PT_NOTE) &&
((phdr[0].p_offset + phdr[0].p_filesz) < header_size)) {
cb_chain = process_elf_notes(header,
phdr[0].p_offset, phdr[0].p_filesz);
}
/* Preprocess the elf segments */
if (!build_elf_segment_list(&head,
bounce_buffer, mem, phdr, ehdr->e_phnum))
goto out;
/* Load the segments */
if (!load_elf_segments(&head, header, header_size))
goto out;
printk_spew("Loaded segments\n");
/* Verify the loaded image */
if (!verify_loaded_image(cb_chain, ehdr, phdr, &head))
goto out;
printk_spew("verified segments\n");
/* Shutdown the stream device */
stream_fini();
printk_spew("closed down stream\n");
/* Reset to booting from this image as late as possible */
boot_successful();
printk_debug("Jumping to boot code at 0x%x\n", entry);
post_code(0xfe);
/* Jump to kernel */
jmp_to_elf_entry(entry, bounce_buffer);
return 1;
out:
return 0;
}
int elfboot(struct lb_memory *mem)
{
Elf_ehdr *ehdr;
static unsigned char header[ELF_HEAD_SIZE];
int header_offset;
int i, result;
result = 0;
printk_info("\n");
printk_info("Welcome to %s, the open sourced starter.\n", BOOTLOADER);
printk_info("January 2002, Eric Biederman.\n");
printk_info("Version %s\n", BOOTLOADER_VERSION);
printk_info("\n");
post_code(0xf8);
if (stream_init() < 0) {
printk_err("Could not initialize driver...\n");
goto out;
}
/* Read in the initial ELF_HEAD_SIZE bytes */
if (stream_read(header, ELF_HEAD_SIZE) != ELF_HEAD_SIZE) {
printk_err("Read failed...\n");
goto out;
}
/* Scan for an elf header */
header_offset = -1;
for(i = 0; i < ELF_HEAD_SIZE - (sizeof(Elf_ehdr) + sizeof(Elf_phdr)); i+=16) {
ehdr = (Elf_ehdr *)(&header[i]);
if (memcmp(ehdr->e_ident, ELFMAG, 4) != 0) {
printk_spew("NO header at %d\n", i);
continue;
}
printk_debug("Found ELF candiate at offset %d\n", i);
/* Sanity check the elf header */
if ((ehdr->e_type == ET_EXEC) &&
elf_check_arch(ehdr) &&
(ehdr->e_ident[EI_VERSION] == EV_CURRENT) &&
(ehdr->e_version == EV_CURRENT) &&
(ehdr->e_ehsize == sizeof(Elf_ehdr)) &&
(ehdr->e_phentsize = sizeof(Elf_phdr)) &&
(ehdr->e_phoff < (ELF_HEAD_SIZE - i)) &&
((ehdr->e_phoff + (ehdr->e_phentsize * ehdr->e_phnum)) <=
(ELF_HEAD_SIZE - i))) {
header_offset = i;
break;
}
ehdr = 0;
}
printk_spew("header_offset is %d\n", header_offset);
if (header_offset == -1) {
goto out;
}
printk_spew("Try to load at offset 0x%x\n", header_offset);
result = elfload(mem,
header + header_offset , ELF_HEAD_SIZE - header_offset);
out:
if (!result) {
/* Shutdown the stream device */
stream_fini();
printk_err("Cannot Load ELF Image\n");
post_code(0xff);
}
return 0;
}

216
src/boot/hardwaremain.c Normal file
View File

@@ -0,0 +1,216 @@
/*
This software and ancillary information (herein called SOFTWARE )
called LinuxBIOS is made available under the terms described
here. The SOFTWARE has been approved for release with associated
LA-CC Number 00-34 . Unless otherwise indicated, this SOFTWARE has
been authored by an employee or employees of the University of
California, operator of the Los Alamos National Laboratory under
Contract No. W-7405-ENG-36 with the U.S. Department of Energy. The
U.S. Government has rights to use, reproduce, and distribute this
SOFTWARE. The public may copy, distribute, prepare derivative works
and publicly display this SOFTWARE without charge, provided that this
Notice and any statement of authorship are reproduced on all copies.
Neither the Government nor the University makes any warranty, express
or implied, or assumes any liability or responsibility for the use of
this SOFTWARE. If SOFTWARE is modified to produce derivative works,
such modified SOFTWARE should be clearly marked, so as not to confuse
it with the version available from LANL.
*/
/* Copyright 2000, Ron Minnich, Advanced Computing Lab, LANL
* rminnich@lanl.gov
*/
/*
* C Bootstrap code for the LinuxBIOS
*/
#include <console/console.h>
#include <cpu/cpu.h>
#include <mem.h>
#include <version.h>
#include <smp/start_stop.h>
#include <boot/tables.h>
#include <part/sizeram.h>
#include <device.h>
#include <pci.h>
#if 0
#include <part/mainboard.h>
#endif
#if 0
#include <part/hard_reset.h>
#endif
#include <smp/atomic.h>
#include <boot/elf.h>
#ifndef CONFIG_MAX_PHYSICAL_CPUS
#define CONFIG_MAX_PHYSICAL_CPUS CONFIG_MAX_CPUS
#endif
/* The processor map.
* Now that SMP is in linuxbios, and Linux counts on us
* giving accurate information about processors, we need a map
* of what processors are out there. This could be a bit mask,
* but we will be optimistic and hope we someday run on
* REALLY BIG SMPs. Also we may need more than one bit of
* info per processor at some point. I hope we don't need
* anything more complex than an int.
*/
static unsigned long processor_map[MAX_CPUS];
static struct mem_range *get_ramsize(void)
{
struct mem_range *mem = 0;
if (!mem) {
mem = sizeram();
}
if (!mem) {
printk_err("No memory size information!\n");
for(;;);
}
return mem;
}
#if SMP == 1
/* Number of cpus that are currently running in linuxbios */
static atomic_t active_cpus = ATOMIC_INIT(1);
void secondary_cpu_init(void)
{
struct mem_range *mem;
unsigned long id;
int index;
atomic_inc(&active_cpus);
printk_debug(__FUNCTION__ "\n");
mem = get_ramsize();
id = cpu_initialize(mem);
index = processor_index(id);
printk_debug(__FUNCTION__ " %d/%u\n", index, id);
processor_map[index] = CPU_ENABLED;
atomic_dec(&active_cpus);
stop_cpu(id);
}
static void wait_for_other_cpus(void)
{
int old_active_count, active_count;
int i;
old_active_count = 1;
active_count = atomic_read(&active_cpus);
while(active_count > 1) {
if (active_count != old_active_count) {
printk_info("Waiting for %d CPUS to stop\n", active_count);
old_active_count = active_count;
}
active_count = atomic_read(&active_cpus);
}
for(i = 0; i < MAX_CPUS; i++) {
if (!(processor_map[i] & CPU_ENABLED)) {
printk_err("CPU %d/%u did not initialize!\n",
i, initial_apicid[i]);
processor_map[i] = 0;
mainboard_cpu_fixup(i);
}
}
printk_debug("All AP CPUs stopped\n");
}
#else /* SMP */
#define wait_for_other_cpus() do {} while(0)
#endif /* SMP */
void hardwaremain(int boot_complete)
{
/* Processor ID of the BOOT cpu (i.e. the one running this code) */
unsigned long boot_cpu;
int boot_index;
/* the order here is a bit tricky. We don't want to do much of
* anything that uses config registers until after PciAllocateResources
* since that function also figures out what kind of config strategy
* to use (type 1 or type 2).
* so we turn on cache, then worry about PCI setup, then do other
* things, so that the other work can use the PciRead* and PciWrite*
* functions.
*/
struct mem_range *mem, *tmem;
struct lb_memory *lb_mem;
unsigned long totalmem;
post_code(0x80);
/* displayinit MUST PRECEDE ALL PRINTK! */
console_init();
post_code(0x39);
printk_notice("LinuxBIOS-%s%s %s %s...\n",
linuxbios_version, linuxbios_extra_version, linuxbios_build,
(boot_complete)?"rebooting":"booting");
post_code(0x40);
#if 0
/* If we have already booted attempt a hard reboot */
if (boot_complete) {
hard_reset();
}
#endif
#if 1
// pick how to scan the bus. This is first so we can get at memory size.
printk_info("Finding PCI configuration type.\n");
pci_set_method();
post_code(0x5f);
#if 0
enumerate_static_devices();
#endif
dev_enumerate();
post_code(0x66);
// Now do the real bus
// we round the total ram up a lot for thing like the SISFB, which
// shares high memory with the CPU.
dev_configure();
post_code(0x88);
dev_enable();
dev_initialize();
post_code(0x89);
#endif
mem = get_ramsize();
post_code(0x70);
totalmem = 0;
for(tmem = mem; tmem->sizek; tmem++) {
totalmem += tmem->sizek;
}
printk_info("totalram: %ldM\n",
(totalmem + 512) >> 10); /* Round to the nearest meg */
/* Fully initialize the cpu before configuring the bus */
boot_cpu = cpu_initialize(mem);
boot_index = processor_index(boot_cpu);
printk_spew("BOOT CPU is %d\n", boot_cpu);
processor_map[boot_index] = CPU_BOOTPROCESSOR|CPU_ENABLED;
/* Now start the other cpus initializing
* The sooner they start the sooner they stop.
*/
post_code(0x75);
startup_other_cpus(processor_map);
post_code(0x77);
/* make certain we are the only cpu running in linuxBIOS */
wait_for_other_cpus();
/* Now that we have collected all of our information
* write our configuration tables.
*/
lb_mem = write_tables(mem, processor_map);
elfboot(lb_mem);
}