+++ /dev/null
-#ifdef LINUXBIOS
-
-#include "etherboot.h"
-#include "dev.h"
-#include "linuxbios_tables.h"
-
-struct meminfo meminfo;
-static int lb_failsafe = 1;
-static unsigned lb_boot[MAX_BOOT_ENTRIES];
-static unsigned lb_boot_index;
-static struct cmos_entries lb_countdown;
-static struct cmos_checksum lb_checksum;
-
-#undef DEBUG_LINUXBIOS
-
-static void set_base_mem_k(struct meminfo *info, unsigned mem_k)
-{
- if ((mem_k <= 640) && (info->basememsize <= mem_k)) {
- info->basememsize = mem_k;
- }
-}
-static void set_high_mem_k(struct meminfo *info, unsigned mem_k)
-{
- /* Shave off a megabyte before playing */
- if (mem_k < 1024) {
- return;
- }
- mem_k -= 1024;
- if (info->memsize <= mem_k) {
- info->memsize = mem_k;
- }
-}
-
-#define for_each_lbrec(head, rec) \
- for(rec = (struct lb_record *)(((char *)head) + sizeof(*head)); \
- (((char *)rec) < (((char *)head) + sizeof(*head) + head->table_bytes)) && \
- (rec->size >= 1) && \
- ((((char *)rec) + rec->size) <= (((char *)head) + sizeof(*head) + head->table_bytes)); \
- rec = (struct lb_record *)(((char *)rec) + rec->size))
-
-
-#define for_each_crec(tbl, rec) \
- for(rec = (struct lb_record *)(((char *)tbl) + tbl->header_length); \
- (((char *)rec) < (((char *)tbl) + tbl->size)) && \
- (rec->size >= 1) && \
- ((((char *)rec) + rec->size) <= (((char *)tbl) + tbl->size)); \
- rec = (struct lb_record *)(((char *)rec) + rec->size))
-
-
-
-static void read_lb_memory(
- struct meminfo *info, struct lb_memory *mem)
-{
- int i;
- int entries;
- entries = (mem->size - sizeof(*mem))/sizeof(mem->map[0]);
- for(i = 0; (i < entries); i++) {
- if (info->map_count < E820MAX) {
- info->map[info->map_count].addr = mem->map[i].start;
- info->map[info->map_count].size = mem->map[i].size;
- info->map[info->map_count].type = mem->map[i].type;
- info->map_count++;
- }
- switch(mem->map[i].type) {
- case LB_MEM_RAM:
- {
- unsigned long long end;
- unsigned long mem_k;
- end = mem->map[i].start + mem->map[i].size;
-#if defined(DEBUG_LINUXBIOS)
- printf("lb: %X%X - %X%X (ram)\n",
- (unsigned long)(mem->map[i].start >>32),
- (unsigned long)(mem->map[i].start & 0xFFFFFFFF),
- (unsigned long)(end >> 32),
- (unsigned long)(end & 0xFFFFFFFF));
-#endif /* DEBUG_LINUXBIOS */
- end >>= 10;
- mem_k = end;
- if (end & 0xFFFFFFFF00000000ULL) {
- mem_k = 0xFFFFFFFF;
- }
- set_base_mem_k(info, mem_k);
- set_high_mem_k(info, mem_k);
- break;
- }
- case LB_MEM_RESERVED:
- default:
-#if defined(DEBUG_LINUXBIOS)
- {
- unsigned long long end;
- end = mem->map[i].start + mem->map[i].size;
- printf("lb: %X%X - %X%X (reserved)\n",
- (unsigned long)(mem->map[i].start >>32),
- (unsigned long)(mem->map[i].start & 0xFFFFFFFF),
- (unsigned long)(end >> 32),
- (unsigned long)(end & 0xFFFFFFFF));
- }
-#endif /* DEBUG_LINUXBIOS */
- break;
- }
- }
-}
-
-static unsigned cmos_read(unsigned offset, unsigned int size)
-{
- unsigned addr, old_addr;
- unsigned value;
-
- addr = offset/8;
-
- old_addr = inb(0x70);
- outb(addr | (old_addr &0x80), 0x70);
- value = inb(0x71);
- outb(old_addr, 0x70);
-
- value >>= offset & 0x7;
- value &= ((1 << size) - 1);
-
- return value;
-}
-
-static unsigned cmos_read_checksum(void)
-{
- unsigned sum =
- (cmos_read(lb_checksum.location, 8) << 8) |
- cmos_read(lb_checksum.location +8, 8);
- return sum & 0xffff;
-}
-
-static int cmos_valid(void)
-{
- unsigned i;
- unsigned sum, old_sum;
- sum = 0;
- if ((lb_checksum.tag != LB_TAG_OPTION_CHECKSUM) ||
- (lb_checksum.type != CHECKSUM_PCBIOS) ||
- (lb_checksum.size != sizeof(lb_checksum))) {
- return 0;
- }
- for(i = lb_checksum.range_start; i <= lb_checksum.range_end; i+= 8) {
- sum += cmos_read(i, 8);
- }
- sum = (~sum)&0x0ffff;
- old_sum = cmos_read_checksum();
- return sum == old_sum;
-}
-
-static void cmos_write(unsigned offset, unsigned int size, unsigned setting)
-{
- unsigned addr, old_addr;
- unsigned value, mask, shift;
- unsigned sum;
-
- addr = offset/8;
-
- shift = offset & 0x7;
- mask = ((1 << size) - 1) << shift;
- setting = (setting << shift) & mask;
-
- old_addr = inb(0x70);
- sum = cmos_read_checksum();
- sum = (~sum) & 0xffff;
-
- outb(addr | (old_addr &0x80), 0x70);
- value = inb(0x71);
- sum -= value;
- value &= ~mask;
- value |= setting;
- sum += value;
- outb(value, 0x71);
-
- sum = (~sum) & 0x0ffff;
- outb((lb_checksum.location/8) | (old_addr & 0x80), 0x70);
- outb((sum >> 8) & 0xff, 0x71);
- outb(((lb_checksum.location +8)/8) | (old_addr & 0x80), 0x70);
- outb(sum & 0xff, 0x71);
-
- outb(old_addr, 0x70);
-
- return;
-}
-
-static void read_linuxbios_values(struct meminfo *info,
- struct lb_header *head)
-{
- /* Read linuxbios tables... */
- struct lb_record *rec;
- memset(lb_boot, 0, sizeof(lb_boot));
- for_each_lbrec(head, rec) {
- switch(rec->tag) {
- case LB_TAG_MEMORY:
- {
- struct lb_memory *mem;
- mem = (struct lb_memory *) rec;
- read_lb_memory(info, mem);
- break;
- }
- case LB_TAG_CMOS_OPTION_TABLE:
- {
- struct cmos_option_table *tbl;
- struct lb_record *crec;
- struct cmos_entries *entry;
- tbl = (struct cmos_option_table *)rec;
- for_each_crec(tbl, crec) {
- /* Pick off the checksum entry and keep it */
- if (crec->tag == LB_TAG_OPTION_CHECKSUM) {
- memcpy(&lb_checksum, crec, sizeof(lb_checksum));
- continue;
- }
- if (crec->tag != LB_TAG_OPTION)
- continue;
- entry = (struct cmos_entries *)crec;
- if ((entry->bit < 112) || (entry->bit > 1020))
- continue;
- /* See if LinuxBIOS came up in fallback or normal mode */
- if (memcmp(entry->name, "last_boot", 10) == 0) {
- lb_failsafe = cmos_read(entry->bit, entry->length) == 0;
- continue;
- }
- /* Find where the boot countdown is */
- if (memcmp(entry->name, "boot_countdown", 15) == 0) {
- lb_countdown = *entry;
- continue;
- }
- /* Find the default boot index */
- if (memcmp(entry->name, "boot_index", 11) == 0) {
- lb_boot_index = cmos_read(entry->bit, entry->length);
- continue;
- }
- /* Now filter for the boot order options */
- if (entry->length != 4)
- continue;
- if (entry->config != 'e')
- continue;
- if (memcmp(entry->name, "boot_first", 11) == 0) {
- lb_boot[0] = cmos_read(entry->bit, entry->length);
- }
- else if (memcmp(entry->name, "boot_second", 12) == 0) {
- lb_boot[1] = cmos_read(entry->bit, entry->length);
- }
- else if (memcmp(entry->name, "boot_third", 11) == 0) {
- lb_boot[2] = cmos_read(entry->bit, entry->length);
- }
- }
- break;
- }
- default:
- break;
- };
- }
-}
-
-
-
-static unsigned long count_lb_records(void *start, unsigned long length)
-{
- struct lb_record *rec;
- void *end;
- unsigned long count;
- count = 0;
- end = ((char *)start) + length;
- for(rec = start; ((void *)rec < end) &&
- ((signed long)rec->size <= (end - (void *)rec));
- rec = (void *)(((char *)rec) + rec->size)) {
- count++;
- }
- return count;
-}
-
-static int find_lb_table(void *start, void *end, struct lb_header **result)
-{
- unsigned char *ptr;
-
- /* For now be stupid.... */
- for(ptr = start; virt_to_phys(ptr) < virt_to_phys(end); ptr += 16) {
- struct lb_header *head = (struct lb_header *)ptr;
- if ( (head->signature[0] != 'L') ||
- (head->signature[1] != 'B') ||
- (head->signature[2] != 'I') ||
- (head->signature[3] != 'O')) {
- continue;
- }
- if (head->header_bytes != sizeof(*head))
- continue;
-#if defined(DEBUG_LINUXBIOS)
- printf("Found canidate at: %X\n", virt_to_phys(head));
-#endif
- if (ipchksum((uint16_t *)head, sizeof(*head)) != 0)
- continue;
-#if defined(DEBUG_LINUXBIOS)
- printf("header checksum o.k.\n");
-#endif
- if (ipchksum((uint16_t *)(ptr + sizeof(*head)), head->table_bytes) !=
- head->table_checksum) {
- continue;
- }
-#if defined(DEBUG_LINUXBIOS)
- printf("table checksum o.k.\n");
-#endif
- if (count_lb_records(ptr + sizeof(*head), head->table_bytes) !=
- head->table_entries) {
- continue;
- }
-#if defined(DEBUG_LINUXBIOS)
- printf("record count o.k.\n");
-#endif
- *result = head;
- return 1;
- };
- return 0;
-}
-
-void get_memsizes(void)
-{
- struct lb_header *lb_table;
- int found;
-#if defined(DEBUG_LINUXBIOS)
- printf("\nSearching for linuxbios tables...\n");
-#endif /* DEBUG_LINUXBIOS */
- found = 0;
- meminfo.basememsize = 0;
- meminfo.memsize = 0;
- meminfo.map_count = 0;
- /* This code is specific to linuxBIOS but could
- * concievably be extended to work under a normal bios.
- * but size is important...
- */
- if (!found) {
- found = find_lb_table(phys_to_virt(0x00000), phys_to_virt(0x01000), &lb_table);
- }
- if (!found) {
- found = find_lb_table(phys_to_virt(0xf0000), phys_to_virt(0x100000), &lb_table);
- }
- if (found) {
-#if defined (DEBUG_LINUXBIOS)
- printf("Found LinuxBIOS table at: %X\n", virt_to_phys(lb_table));
-#endif
- read_linuxbios_values(&meminfo, lb_table);
- }
-
-#if defined(DEBUG_LINUXBIOS)
- printf("base_mem_k = %d high_mem_k = %d\n",
- meminfo.basememsize, meminfo.memsize);
-#endif /* DEBUG_LINUXBIOS */
-
-}
-
-unsigned long get_boot_order(unsigned long order, unsigned *index)
-{
- static int again;
- static int checksum_valid;
- static unsigned boot_count;
- int i;
-
- if (!lb_failsafe && !again) {
- /* Decrement the boot countdown the first time through */
- checksum_valid = cmos_valid();
- boot_count = cmos_read(lb_countdown.bit, lb_countdown.length);
- if (boot_count > 0) {
- cmos_write(lb_countdown.bit, lb_countdown.length, boot_count -1);
- }
- again = 1;
- }
- if (lb_failsafe || !checksum_valid) {
- /* When LinuxBIOS is in failsafe mode, or there is an
- * invalid cmos checksum ignore all cmos options
- */
- return order;
- }
- for(i = 0; i < MAX_BOOT_ENTRIES; i++) {
- unsigned long boot;
- boot = order >> (i*BOOT_BITS) & BOOT_MASK;
- boot = lb_boot[i] & BOOT_TYPE_MASK;
- if (boot >= BOOT_NOTHING) {
- boot = BOOT_NOTHING;
- }
- if (boot_count == 0) {
- boot |= BOOT_FAILSAFE;
- }
- order &= ~(BOOT_MASK << (i * BOOT_BITS));
- order |= (boot << (i*BOOT_BITS));
- }
- *index = lb_boot_index;
- return order;
-}
-#endif /* LINUXBIOS */
+++ /dev/null
-#ifndef LINUXBIOS_TABLES_H
-#define LINUXBIOS_TABLES_H
-
-#include "stdint.h"
-
-/* The linuxbios table information is for conveying information
- * from the firmware to the loaded OS image. Primarily this
- * is expected to be information that cannot be discovered by
- * other means, such as quering the hardware directly.
- *
- * All of the information should be Position Independent Data.
- * That is it should be safe to relocated any of the information
- * without it's meaning/correctnes changing. For table that
- * can reasonably be used on multiple architectures the data
- * size should be fixed. This should ease the transition between
- * 32 bit and 64 bit architectures etc.
- *
- * The completeness test for the information in this table is:
- * - Can all of the hardware be detected?
- * - Are the per motherboard constants available?
- * - Is there enough to allow a kernel to run that was written before
- * a particular motherboard is constructed? (Assuming the kernel
- * has drivers for all of the hardware but it does not have
- * assumptions on how the hardware is connected together).
- *
- * With this test it should be straight forward to determine if a
- * table entry is required or not. This should remove much of the
- * long term compatibility burden as table entries which are
- * irrelevant or have been replaced by better alternatives may be
- * dropped. Of course it is polite and expidite to include extra
- * table entries and be backwards compatible, but it is not required.
- */
-
-
-struct lb_header
-{
- uint8_t signature[4]; /* LBIO */
- uint32_t header_bytes;
- uint32_t header_checksum;
- uint32_t table_bytes;
- uint32_t table_checksum;
- uint32_t table_entries;
-};
-
-/* Every entry in the boot enviroment list will correspond to a boot
- * info record. Encoding both type and size. The type is obviously
- * so you can tell what it is. The size allows you to skip that
- * boot enviroment record if you don't know what it easy. This allows
- * forward compatibility with records not yet defined.
- */
-struct lb_record {
- uint32_t tag; /* tag ID */
- uint32_t size; /* size of record (in bytes) */
-};
-
-#define LB_TAG_UNUSED 0x0000
-
-#define LB_TAG_MEMORY 0x0001
-
-struct lb_memory_range {
- uint64_t start;
- uint64_t size;
- uint32_t type;
-#define LB_MEM_RAM 1 /* Memory anyone can use */
-#define LB_MEM_RESERVED 2 /* Don't use this memory region */
-#define LB_MEM_TABLE 16 /* Ram configuration tables are kept in */
-
-};
-
-struct lb_memory {
- uint32_t tag;
- uint32_t size;
- struct lb_memory_range map[0];
-};
-
-#define LB_TAG_HWRPB 0x0002
-struct lb_hwrpb {
- uint32_t tag;
- uint32_t size;
- uint64_t hwrpb;
-};
-
-#define LB_TAG_MAINBOARD 0x0003
-struct lb_mainboard {
- uint32_t tag;
- uint32_t size;
- uint8_t vendor_idx;
- uint8_t part_number_idx;
- uint8_t strings[0];
-};
-
-#define LB_TAG_VERSION 0x0004
-#define LB_TAG_EXTRA_VERSION 0x0005
-#define LB_TAG_BUILD 0x0006
-#define LB_TAG_COMPILE_TIME 0x0007
-#define LB_TAG_COMPILE_BY 0x0008
-#define LB_TAG_COMPILE_HOST 0x0009
-#define LB_TAG_COMPILE_DOMAIN 0x000a
-#define LB_TAG_COMPILER 0x000b
-#define LB_TAG_LINKER 0x000c
-#define LB_TAG_ASSEMBLER 0x000d
-struct lb_string {
- uint32_t tag;
- uint32_t size;
- uint8_t string[0];
-};
-
-/* The following structures are for the cmos definitions table */
-#define LB_TAG_CMOS_OPTION_TABLE 200
-/* cmos header record */
-struct cmos_option_table {
- uint32_t tag; /* CMOS definitions table type */
- uint32_t size; /* size of the entire table */
- uint32_t header_length; /* length of header */
-};
-
-/* cmos entry record
- This record is variable length. The name field may be
- shorter than CMOS_MAX_NAME_LENGTH. The entry may start
- anywhere in the byte, but can not span bytes unless it
- starts at the beginning of the byte and the length is
- fills complete bytes.
-*/
-#define LB_TAG_OPTION 201
-struct cmos_entries {
- uint32_t tag; /* entry type */
- uint32_t size; /* length of this record */
- uint32_t bit; /* starting bit from start of image */
- uint32_t length; /* length of field in bits */
- uint32_t config; /* e=enumeration, h=hex, r=reserved */
- uint32_t config_id; /* a number linking to an enumeration record */
-#define CMOS_MAX_NAME_LENGTH 32
- uint8_t name[CMOS_MAX_NAME_LENGTH]; /* name of entry in ascii,
- variable length int aligned */
-};
-
-
-/* cmos enumerations record
- This record is variable length. The text field may be
- shorter than CMOS_MAX_TEXT_LENGTH.
-*/
-#define LB_TAG_OPTION_ENUM 202
-struct cmos_enums {
- uint32_t tag; /* enumeration type */
- uint32_t size; /* length of this record */
- uint32_t config_id; /* a number identifying the config id */
- uint32_t value; /* the value associated with the text */
-#define CMOS_MAX_TEXT_LENGTH 32
- uint8_t text[CMOS_MAX_TEXT_LENGTH]; /* enum description in ascii,
- variable length int aligned */
-};
-
-/* cmos defaults record
- This record contains default settings for the cmos ram.
-*/
-#define LB_TAG_OPTION_DEFAULTS 203
-struct cmos_defaults {
- uint32_t tag; /* default type */
- uint32_t size; /* length of this record */
- uint32_t name_length; /* length of the following name field */
- uint8_t name[CMOS_MAX_NAME_LENGTH]; /* name identifying the default */
-#define CMOS_IMAGE_BUFFER_SIZE 128
- uint8_t default_set[CMOS_IMAGE_BUFFER_SIZE]; /* default settings */
-};
-
-#define LB_TAG_OPTION_CHECKSUM 204
-struct cmos_checksum {
- uint32_t tag;
- uint32_t size;
- /* In practice everything is byte aligned, but things are measured
- * in bits to be consistent.
- */
- uint32_t range_start; /* First bit that is checksummed (byte aligned) */
- uint32_t range_end; /* Last bit that is checksummed (byte aligned) */
- uint32_t location; /* First bit of the checksum (byte aligned) */
- uint32_t type; /* Checksum algorithm that is used */
-#define CHECKSUM_NONE 0
-#define CHECKSUM_PCBIOS 1
-};
-
-
-
-#endif /* LINUXBIOS_TABLES_H */
projects / thirdparty / ipxe.git / commitdiff
