static void
bda_init(void)
{
dprintf(3, "init bda\n");
struct bios_data_area_s *bda = MAKE_FLATPTR(SEG_BDA, 0);
memset(bda, 0, sizeof(*bda));
int esize = EBDA_SIZE_START;
u16 ebda_seg = EBDA_SEGMENT_START;
if (!CONFIG_MALLOC_UPPERMEMORY)
ebda_seg = FLATPTR_TO_SEG(ALIGN_DOWN(SYMBOL(final_varlow_start), 1024)
- EBDA_SIZE_START*1024);
SET_BDA(ebda_seg, ebda_seg);
SET_BDA(mem_size_kb, ebda_seg / (1024/16));
// Init ebda
struct extended_bios_data_area_s *ebda = get_ebda_ptr();
memset(ebda, 0, sizeof(*ebda));
ebda->size = esize;
e820_add((u32)ebda, BUILD_LOWRAM_END-(u32)ebda, E820_RESERVED);
// Init extra stack
StackPos = &ExtraStack[BUILD_EXTRA_STACK_SIZE] - SYMBOL(zonelow_base);
}
// Remove any definitions in a memory range (make a memory hole).
void
e820_remove(u64 start, u64 size)
{
e820_add(start, size, E820_HOLE);
}
/* PrepareToBoot */
static void
handle_csm_0002(struct bregs *regs)
{
if (!CONFIG_BOOT) {
regs->ax = 1;
return;
}
dprintf(3, "PrepareToBoot table %04x:%04x\n", regs->es, regs->bx);
struct e820entry *p = (void *)csm_compat_table.E820Pointer;
int i;
for (i=0; i < csm_compat_table.E820Length / sizeof(struct e820entry); i++)
e820_add(p[i].start, p[i].size, p[i].type);
if (csm_init_table->HiPmmMemorySizeInBytes > BUILD_MAX_HIGHTABLE) {
u32 hi_pmm_end = csm_init_table->HiPmmMemory + csm_init_table->HiPmmMemorySizeInBytes;
e820_add(hi_pmm_end - BUILD_MAX_HIGHTABLE, BUILD_MAX_HIGHTABLE, E820_RESERVED);
}
// For PCIBIOS 1ab10e
if (csm_compat_table.IrqRoutingTablePointer &&
csm_compat_table.IrqRoutingTableLength) {
PirAddr = (void *)csm_compat_table.IrqRoutingTablePointer;
dprintf(3, "CSM PIRQ table at %p\n", PirAddr);
}
// For find_resume_vector()... and find_acpi_features()
if (csm_rsdp.signature == RSDP_SIGNATURE) {
RsdpAddr = &csm_rsdp;
dprintf(3, "CSM ACPI RSDP at %p\n", RsdpAddr);
find_acpi_features();
}
// SMBIOS table needs to be copied into the f-seg
// XX: OVMF doesn't seem to set SmbiosTableLength so don't check it
if (csm_boot_table->SmbiosTable && !SMBiosAddr)
copy_smbios((void *)csm_boot_table->SmbiosTable);
// MPTABLE is just there; we don't care where.
// EFI may have reinitialised the video using its *own* driver.
enable_vga_console();
// EFI fills this in for us. Zero it for now...
struct bios_data_area_s *bda = MAKE_FLATPTR(SEG_BDA, 0);
bda->hdcount = 0;
thread_setup();
mathcp_setup();
timer_setup();
clock_setup();
device_hardware_setup();
wait_threads();
interactive_bootmenu();
prepareboot();
regs->ax = 0;
}
