//
// Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
//
-// This file may be distributed under the terms of the GNU GPLv3 license.
+// This file may be distributed under the terms of the GNU LGPLv3 license.
#include "memmap.h" // add_e820
#include "util.h" // dprintf
+#include "pci.h" // struct pir_header
+#include "acpi.h" // struct rsdp_descriptor
+#include "biosvar.h" // GET_EBDA
/****************************************************************
- * Memory interface
+ * BIOS table copying
+ ****************************************************************/
+
+static void
+copy_pir(void *pos)
+{
+ struct pir_header *p = pos;
+ if (p->signature != PIR_SIGNATURE)
+ return;
+ if (PirOffset)
+ return;
+ if (p->size < sizeof(*p))
+ return;
+ if (checksum(pos, p->size) != 0)
+ return;
+ bios_table_cur_addr = ALIGN(bios_table_cur_addr, 16);
+ if (bios_table_cur_addr + p->size > bios_table_end_addr) {
+ dprintf(1, "No room to copy PIR table!\n");
+ return;
+ }
+ dprintf(1, "Copying PIR from %p to %x\n", pos, bios_table_cur_addr);
+ memcpy((void*)bios_table_cur_addr, pos, p->size);
+ PirOffset = bios_table_cur_addr - BUILD_BIOS_ADDR;
+ bios_table_cur_addr += p->size;
+}
+
+static void
+copy_mptable(void *pos)
+{
+ struct mptable_floating_s *p = pos;
+ if (p->signature != MPTABLE_SIGNAURE)
+ return;
+ if (!p->physaddr)
+ return;
+ if (checksum(pos, sizeof(*p)) != 0)
+ return;
+ u32 length = p->length * 16;
+ bios_table_cur_addr = ALIGN(bios_table_cur_addr, 16);
+ if (bios_table_cur_addr + length > bios_table_end_addr) {
+ dprintf(1, "No room to copy MPTABLE!\n");
+ return;
+ }
+ dprintf(1, "Copying MPTABLE from %p to %x\n", pos, bios_table_cur_addr);
+ memcpy((void*)bios_table_cur_addr, pos, length);
+ bios_table_cur_addr += length;
+}
+
+static void
+copy_acpi_rsdp(void *pos)
+{
+ if (RsdpAddr)
+ return;
+ struct rsdp_descriptor *p = pos;
+ if (p->signature != RSDP_SIGNATURE)
+ return;
+ u32 length = 20;
+ if (checksum(pos, length) != 0)
+ return;
+ if (p->revision > 1) {
+ length = p->length;
+ if (checksum(pos, length) != 0)
+ return;
+ }
+ bios_table_cur_addr = ALIGN(bios_table_cur_addr, 16);
+ if (bios_table_cur_addr + length > bios_table_end_addr) {
+ dprintf(1, "No room to copy ACPI RSDP table!\n");
+ return;
+ }
+ dprintf(1, "Copying ACPI RSDP from %p to %x\n", pos, bios_table_cur_addr);
+ RsdpAddr = (void*)bios_table_cur_addr;
+ memcpy(RsdpAddr, pos, length);
+ bios_table_cur_addr += length;
+}
+
+// Attempt to find (and relocate) any standard bios tables found in a
+// given address range.
+static void
+scan_tables(u32 start, u32 size)
+{
+ void *p = (void*)ALIGN(start, 16);
+ void *end = (void*)start + size;
+ for (; p<end; p += 16) {
+ copy_pir(p);
+ copy_mptable(p);
+ copy_acpi_rsdp(p);
+ }
+}
+
+
+/****************************************************************
+ * Memory map
****************************************************************/
struct cb_header {
struct cb_header *cbh = (struct cb_header *)addr;
if (cbh->signature != CB_SIGNATURE)
continue;
- dprintf(1, "sig %p=%x\n", addr, cbh->signature);
if (! cbh->table_bytes)
continue;
if (ipchksum(addr, sizeof(*cbh)) != 0)
}
// Try to find the coreboot memory table in the given coreboot table.
-static struct cb_memory *
-find_cb_memory(struct cb_header *cbh)
+static void *
+find_cb_subtable(struct cb_header *cbh, u32 tag)
{
char *tbl = (char *)cbh + sizeof(*cbh);
int i;
for (i=0; i<cbh->table_entries; i++) {
struct cb_memory *cbm = (struct cb_memory *)tbl;
tbl += cbm->size;
- if (cbm->tag == CB_TAG_MEMORY)
+ if (cbm->tag == tag)
return cbm;
}
return NULL;
struct cb_header *cbh = find_cb_header(0, 0x1000);
if (!cbh)
goto fail;
- struct cb_memory *cbm = find_cb_memory(cbh);
+ struct cb_memory *cbm = find_cb_subtable(cbh, CB_TAG_MEMORY);
if (!cbm)
goto fail;
- u64 maxram = 0;
+ u64 maxram = 0, maxram_over4G = 0;
int i, count = MEM_RANGE_COUNT(cbm);
for (i=0; i<count; i++) {
struct cb_memory_range *m = &cbm->map[i];
u32 type = m->type;
- if (type == CB_MEM_TABLE)
+ if (type == CB_MEM_TABLE) {
type = E820_RESERVED;
- if ((type == E820_ACPI || type == E820_RAM)
- && (m->start + m->size) > maxram)
- maxram = m->start + m->size;
+ scan_tables(m->start, m->size);
+ } else if (type == E820_ACPI || type == E820_RAM) {
+ u64 end = m->start + m->size;
+ if (end > 0x100000000ull) {
+ end -= 0x100000000ull;
+ if (end > maxram_over4G)
+ maxram_over4G = end;
+ } else if (end > maxram)
+ maxram = end;
+ }
add_e820(m->start, m->size, type);
}
+ RamSize = maxram;
+ RamSizeOver4G = maxram_over4G;
+
// Ughh - coreboot likes to set a map at 0x0000-0x1000, but this
// confuses grub. So, override it.
add_e820(0, 16*1024, E820_RAM);
- SET_EBDA(ram_size, maxram);
+ // XXX - just create dummy smbios table for now - should detect if
+ // smbios/dmi table is found from coreboot and use that instead.
+ smbios_init();
+
return;
fail:
// No table found.. Use 16Megs as a dummy value.
dprintf(1, "Unable to find coreboot table!\n");
- SET_EBDA(ram_size, 16*1024*1024);
+ RamSize = 16*1024*1024;
+ RamSizeOver4G = 0;
add_e820(0, 16*1024*1024, E820_RAM);
return;
}
projects / seabios.git / blobdiff