#include "biosvar.h" // struct bios_data_area_s
#include "disk.h" // floppy_drive_setup
#include "ata.h" // ata_setup
+#include "ahci.h" // ahci_setup
#include "memmap.h" // add_e820
#include "pic.h" // pic_setup
#include "pci.h" // create_pirtable
#include "usb.h" // usb_setup
#include "smbios.h" // smbios_init
#include "paravirt.h" // qemu_cfg_port_probe
+#include "xen.h" // xen_probe_hvm_info
#include "ps2port.h" // ps2port_setup
#include "virtio-blk.h" // virtio_blk_setup
+
+/****************************************************************
+ * BIOS init
+ ****************************************************************/
+
static void
init_ivt(void)
{
int esize = EBDA_SIZE_START;
SET_BDA(mem_size_kb, BUILD_LOWRAM_END/1024 - esize);
- u16 eseg = EBDA_SEGMENT_START;
- SET_BDA(ebda_seg, eseg);
+ u16 ebda_seg = EBDA_SEGMENT_START;
+ SET_BDA(ebda_seg, ebda_seg);
// Init ebda
struct extended_bios_data_area_s *ebda = get_ebda_ptr();
memset(ebda, 0, sizeof(*ebda));
ebda->size = esize;
+
+ add_e820((u32)MAKE_FLATPTR(ebda_seg, 0), GET_EBDA2(ebda_seg, size) * 1024
+ , E820_RESERVED);
}
static void
dprintf(3, "Find memory size\n");
if (CONFIG_COREBOOT) {
coreboot_setup();
+ } else if (usingXen()) {
+ xen_setup();
} else {
// On emulators, get memory size from nvram.
u32 rs = ((inb_cmos(CMOS_MEM_EXTMEM2_LOW) << 16)
add_e820(BUILD_LOWRAM_END, BUILD_BIOS_ADDR-BUILD_LOWRAM_END, E820_HOLE);
// Mark known areas as reserved.
- u16 ebda_seg = get_ebda_seg();
- add_e820((u32)MAKE_FLATPTR(ebda_seg, 0), GET_EBDA2(ebda_seg, size) * 1024
- , E820_RESERVED);
add_e820(BUILD_BIOS_ADDR, BUILD_BIOS_SIZE, E820_RESERVED);
u32 count = qemu_cfg_e820_entries();
coreboot_copy_biostable();
return;
}
+ if (usingXen()) {
+ xen_copy_biostables();
+ return;
+ }
create_pirtable();
floppy_setup();
ata_setup();
+ ahci_setup();
+ cbfs_payload_setup();
ramdisk_setup();
virtio_blk_setup();
}
+// Begin the boot process by invoking an int0x19 in 16bit mode.
+void VISIBLE32FLAT
+startBoot(void)
+{
+ // Clear low-memory allocations (required by PMM spec).
+ memset((void*)BUILD_STACK_ADDR, 0, BUILD_EBDA_MINIMUM - BUILD_STACK_ADDR);
+
+ dprintf(3, "Jump to int19\n");
+ struct bregs br;
+ memset(&br, 0, sizeof(br));
+ br.flags = F_IF;
+ call16_int(0x19, &br);
+}
+
// Main setup code.
-void VISIBLE32INIT
-post(void)
+static void
+maininit(void)
{
- // Detect and init ram.
+ // Running at new code address - do code relocation fixups
+ malloc_fixupreloc();
+
+ // Setup ivt/bda/ebda
init_ivt();
init_bda();
- memmap_setup();
- qemu_cfg_port_probe();
- ram_probe();
- malloc_setup();
- thread_setup();
// Init base pc hardware.
pic_setup();
mathcp_setup();
// Initialize mtrr
- smp_probe_setup();
mtrr_setup();
// Initialize pci
pci_setup();
smm_init();
+ // Setup Xen hypercalls
+ xen_init_hypercalls();
+
// Initialize internal tables
boot_setup();
- drive_setup();
// Start hardware initialization (if optionrom threading)
if (CONFIG_THREADS && CONFIG_THREAD_OPTIONROMS)
// Setup interfaces that option roms may need
bios32_setup();
+ dprintf(3, "[wurm] pmm_setup\n");
pmm_setup();
+ dprintf(3, "[wurm] pnp_setup\n");
pnp_setup();
+ dprintf(3, "[wurm] kbd_setup\n");
kbd_setup();
+ dprintf(3, "[wurm] mouse_setup\n");
mouse_setup();
+ dprintf(3, "[wurm] init_bios_tables\n");
init_bios_tables();
// Run vga option rom
+ dprintf(3, "[wurm] vga_setup\n");
vga_setup();
// Do hardware initialization (if running synchronously)
}
// Run option roms
+ dprintf(3, "[wurm] optionrom_setup\n");
optionrom_setup();
// Run BCVs and show optional boot menu
+ dprintf(3, "[wurm] boot_prep\n");
boot_prep();
// Finalize data structures before boot
+ dprintf(3, "[wurm] cdemu_setup\n");
cdemu_setup();
+ dprintf(3, "[wurm] pmm_finalize\n");
pmm_finalize();
+ dprintf(3, "[wurm] malloc_finalize\n");
malloc_finalize();
+ dprintf(3, "[wurm] memmap_finalize\n");
memmap_finalize();
+
+ // Setup bios checksum.
+ BiosChecksum -= checksum((u8*)BUILD_BIOS_ADDR, BUILD_BIOS_SIZE);
+
+ // Write protect bios memory.
+ dprintf(3, "[wurm] make_bios_readonly\n");
+ make_bios_readonly();
+
+ // Invoke int 19 to start boot process.
+ dprintf(3, "[wurm] startBoot\n");
+ startBoot();
}
-static int HaveRunPost;
-// Attempt to invoke a hard-reboot.
+/****************************************************************
+ * POST entry and code relocation
+ ****************************************************************/
+
+// Update given relocs for the code at 'dest' with a given 'delta'
static void
-tryReboot(void)
+updateRelocs(void *dest, u32 *rstart, u32 *rend, u32 delta)
{
- dprintf(1, "Attempting a hard reboot\n");
+ u32 *reloc;
+ for (reloc = rstart; reloc < rend; reloc++)
+ *((u32*)(dest + *reloc)) += delta;
+}
- // Setup for reset on qemu.
- if (! CONFIG_COREBOOT) {
- qemu_prep_reset();
- if (HaveRunPost)
- apm_shutdown();
+// Relocate init code and then call maininit() at new address.
+static void
+reloc_init(void)
+{
+ if (!CONFIG_RELOCATE_INIT) {
+ maininit();
+ return;
}
+ // Symbols populated by the build.
+ extern u8 code32flat_start[];
+ extern u8 _reloc_min_align[];
+ extern u32 _reloc_abs_start[], _reloc_abs_end[];
+ extern u32 _reloc_rel_start[], _reloc_rel_end[];
+ extern u32 _reloc_init_start[], _reloc_init_end[];
+ extern u8 code32init_start[], code32init_end[];
+
+ // Allocate space for init code.
+ u32 initsize = code32init_end - code32init_start;
+ u32 align = (u32)&_reloc_min_align;
+ void *dest = memalign_tmp(align, initsize);
+ if (!dest)
+ panic("No space for init relocation.\n");
+
+ // Copy code and update relocs (init absolute, init relative, and runtime)
+ dprintf(1, "Relocating init from %p to %p (size %d)\n"
+ , code32init_start, dest, initsize);
+ s32 delta = dest - (void*)code32init_start;
+ memcpy(dest, code32init_start, initsize);
+ updateRelocs(dest, _reloc_abs_start, _reloc_abs_end, delta);
+ updateRelocs(dest, _reloc_rel_start, _reloc_rel_end, -delta);
+ updateRelocs(code32flat_start, _reloc_init_start, _reloc_init_end, delta);
+
+ // Call maininit() in relocated code.
+ void (*func)(void) = (void*)maininit + delta;
+ barrier();
+ func();
+}
- // Try keyboard controller reboot.
- i8042_reboot();
-
- // Try PCI 0xcf9 reboot
- pci_reboot();
+// Setup for code relocation and then call reloc_init
+void VISIBLE32INIT
+dopost(void)
+{
+ HaveRunPost = 1;
- // Try triple fault
- asm volatile("int3");
+ // Detect ram and setup internal malloc.
+ qemu_cfg_port_probe();
+ ram_probe();
+ malloc_setup();
- panic("Could not reboot");
+ // Relocate initialization code and call maininit().
+ reloc_init();
}
-// 32-bit entry point.
+// Entry point for Power On Self Test (POST) - the BIOS initilization
+// phase. This function makes the memory at 0xc0000-0xfffff
+// read/writable and then calls dopost().
void VISIBLE32FLAT
-_start(void)
+handle_post(void)
{
- init_dma();
-
debug_serial_setup();
dprintf(1, "Start bios (version %s)\n", VERSION);
- if (HaveRunPost)
- // This is a soft reboot - invoke a hard reboot.
- tryReboot();
-
- // Allow writes to modify bios area (0xf0000)
- make_bios_writable();
+ // Enable CPU caching
+ setcr0(getcr0() & ~(CR0_CD|CR0_NW));
- HaveRunPost = 1;
+ // Clear CMOS reboot flag.
+ outb_cmos(0, CMOS_RESET_CODE);
- // Perform main setup code.
- post();
+ // Make sure legacy DMA isn't running.
+ init_dma();
- // Setup bios checksum.
- BiosChecksum -= checksum((u8*)BUILD_BIOS_ADDR, BUILD_BIOS_SIZE);
+ // Check if we are running under Xen.
+ xen_probe();
- // Write protect bios memory.
- make_bios_readonly();
+ // Allow writes to modify bios area (0xf0000)
+ make_bios_writable();
- // Invoke int 19 to start boot process.
- dprintf(3, "Jump to int19\n");
- struct bregs br;
- memset(&br, 0, sizeof(br));
- br.flags = F_IF;
- call16_int(0x19, &br);
+ // Now that memory is read/writable - start post process.
+ dopost();
}
projects / seabios.git / blobdiff