// 32bit code to Power On Self Test (POST) a machine.
//
-// Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
+// Copyright (C) 2008-2010 Kevin O'Connor <kevin@koconnor.net>
// Copyright (C) 2002 MandrakeSoft S.A.
//
-// 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 "ioport.h" // PORT_*
-#include "../out/rom16.offset.auto.h" // OFFSET_*
#include "config.h" // CONFIG_*
#include "cmos.h" // CMOS_*
#include "util.h" // memset
#include "biosvar.h" // struct bios_data_area_s
-
-#define bda ((struct bios_data_area_s *)0)
-#define ebda ((struct extended_bios_data_area_s *)(EBDA_SEG<<4))
+#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 "acpi.h" // acpi_bios_init
+#include "bregs.h" // struct bregs
+#include "mptable.h" // mptable_init
+#include "boot.h" // IPL
+#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_bda()
+init_ivt(void)
{
- memset(bda, 0, sizeof(*bda));
+ dprintf(3, "init ivt\n");
+ // Initialize all vectors to the default handler.
int i;
- for (i=0; i<256; i++) {
- bda->ivecs[i].seg = 0xf000;
- bda->ivecs[i].offset = OFFSET_dummy_iret_handler;
- }
-
- bda->mem_size_kb = BASE_MEM_IN_K;
-}
+ for (i=0; i<256; i++)
+ SET_IVT(i, FUNC16(entry_iret_official));
+
+ // Initialize all hw vectors to a default hw handler.
+ for (i=0x08; i<=0x0f; i++)
+ SET_IVT(i, FUNC16(entry_hwpic1));
+ for (i=0x70; i<=0x77; i++)
+ SET_IVT(i, FUNC16(entry_hwpic2));
+
+ // Initialize software handlers.
+ SET_IVT(0x02, FUNC16(entry_02));
+ SET_IVT(0x10, FUNC16(entry_10));
+ SET_IVT(0x11, FUNC16(entry_11));
+ SET_IVT(0x12, FUNC16(entry_12));
+ SET_IVT(0x13, FUNC16(entry_13_official));
+ SET_IVT(0x14, FUNC16(entry_14));
+ SET_IVT(0x15, FUNC16(entry_15));
+ SET_IVT(0x16, FUNC16(entry_16));
+ SET_IVT(0x17, FUNC16(entry_17));
+ SET_IVT(0x18, FUNC16(entry_18));
+ SET_IVT(0x19, FUNC16(entry_19_official));
+ SET_IVT(0x1a, FUNC16(entry_1a));
+ SET_IVT(0x40, FUNC16(entry_40));
+
+ // INT 60h-66h reserved for user interrupt
+ for (i=0x60; i<=0x66; i++)
+ SET_IVT(i, SEGOFF(0, 0));
-static void
-init_handlers()
-{
// set vector 0x79 to zero
// this is used by 'gardian angel' protection system
- bda->ivecs[0x79].seg = 0;
- bda->ivecs[0x79].offset = 0;
-
- bda->ivecs[0x40].offset = OFFSET_entry_40;
- bda->ivecs[0x0e].offset = OFFSET_entry_0e;
- bda->ivecs[0x13].offset = OFFSET_entry_13;
- bda->ivecs[0x76].offset = OFFSET_entry_76;
- bda->ivecs[0x17].offset = OFFSET_entry_17;
- bda->ivecs[0x18].offset = OFFSET_entry_18;
- bda->ivecs[0x19].offset = OFFSET_entry_19;
- bda->ivecs[0x1c].offset = OFFSET_entry_1c;
- bda->ivecs[0x12].offset = OFFSET_entry_12;
- bda->ivecs[0x11].offset = OFFSET_entry_11;
- bda->ivecs[0x15].offset = OFFSET_entry_15;
- bda->ivecs[0x08].offset = OFFSET_entry_08;
- bda->ivecs[0x09].offset = OFFSET_entry_09;
- bda->ivecs[0x16].offset = OFFSET_entry_16;
- bda->ivecs[0x14].offset = OFFSET_entry_14;
- bda->ivecs[0x1a].offset = OFFSET_entry_1a;
- bda->ivecs[0x70].offset = OFFSET_entry_70;
- bda->ivecs[0x74].offset = OFFSET_entry_74;
- bda->ivecs[0x75].offset = OFFSET_entry_75;
- bda->ivecs[0x10].offset = OFFSET_entry_10;
-}
+ SET_IVT(0x79, SEGOFF(0, 0));
-static void
-init_ebda()
-{
- ebda->size = EBDA_SIZE;
- bda->ebda_seg = EBDA_SEG;
- bda->ivecs[0x41].seg = EBDA_SEG;
- bda->ivecs[0x41].offset = 0x3d; // XXX
- bda->ivecs[0x46].seg = EBDA_SEG;
- bda->ivecs[0x46].offset = 0x4d; // XXX
+ SET_IVT(0x1E, SEGOFF(SEG_BIOS, (u32)&diskette_param_table2 - BUILD_BIOS_ADDR));
}
static void
-pit_setup()
+init_bda(void)
{
- // timer0: binary count, 16bit count, mode 2
- outb(0x34, PORT_PIT_MODE);
- // maximum count of 0000H = 18.2Hz
- outb(0x0, PORT_PIT_COUNTER0);
- outb(0x0, PORT_PIT_COUNTER0);
-}
+ dprintf(3, "init bda\n");
-static void
-kbd_init()
-{
-}
+ struct bios_data_area_s *bda = MAKE_FLATPTR(SEG_BDA, 0);
+ memset(bda, 0, sizeof(*bda));
-static void
-kbd_setup()
-{
- bda->kbd_mode = 0x10;
- bda->kbd_buf_head = bda->kbd_buf_tail = offsetof(struct bios_data_area_s, kbd_buf);
- bda->kbd_buf_start_offset = offsetof(struct bios_data_area_s, kbd_buf);
- bda->kbd_buf_end_offset = offsetof(struct bios_data_area_s, kbd_buf[sizeof(bda->kbd_buf)]);
- kbd_init();
-
- // XXX
- u16 eqb = bda->equipment_list_flags;
- eqb = (eqb & 0xff00) | inb_cmos(CMOS_EQUIPMENT_INFO);
- bda->equipment_list_flags = eqb;
-}
+ int esize = EBDA_SIZE_START;
+ SET_BDA(mem_size_kb, BUILD_LOWRAM_END/1024 - esize);
+ u16 ebda_seg = EBDA_SEGMENT_START;
+ SET_BDA(ebda_seg, ebda_seg);
-static void
-lpt_setup()
-{
- // XXX
+ // 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
-serial_setup()
+ram_probe(void)
{
- // XXX
-}
+ 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)
+ | (inb_cmos(CMOS_MEM_EXTMEM2_HIGH) << 24));
+ if (rs)
+ rs += 16 * 1024 * 1024;
+ else
+ rs = (((inb_cmos(CMOS_MEM_EXTMEM_LOW) << 10)
+ | (inb_cmos(CMOS_MEM_EXTMEM_HIGH) << 18))
+ + 1 * 1024 * 1024);
+ RamSize = rs;
+ add_e820(0, rs, E820_RAM);
+
+ // Check for memory over 4Gig
+ u64 high = ((inb_cmos(CMOS_MEM_HIGHMEM_LOW) << 16)
+ | ((u32)inb_cmos(CMOS_MEM_HIGHMEM_MID) << 24)
+ | ((u64)inb_cmos(CMOS_MEM_HIGHMEM_HIGH) << 32));
+ RamSizeOver4G = high;
+ add_e820(0x100000000ull, high, E820_RAM);
+
+ /* reserve 256KB BIOS area at the end of 4 GB */
+ add_e820(0xfffc0000, 256*1024, E820_RESERVED);
+ }
-static u32
-bcd2bin(u8 val)
-{
- return (val & 0xf) + ((val >> 4) * 10);
-}
+ // Don't declare any memory between 0xa0000 and 0x100000
+ add_e820(BUILD_LOWRAM_END, BUILD_BIOS_ADDR-BUILD_LOWRAM_END, E820_HOLE);
+
+ // Mark known areas as reserved.
+ add_e820(BUILD_BIOS_ADDR, BUILD_BIOS_SIZE, E820_RESERVED);
+
+ u32 count = qemu_cfg_e820_entries();
+ if (count) {
+ struct e820_reservation entry;
+ int i;
+
+ for (i = 0; i < count; i++) {
+ qemu_cfg_e820_load_next(&entry);
+ add_e820(entry.address, entry.length, entry.type);
+ }
+ } else if (kvm_para_available()) {
+ // Backwards compatibility - provide hard coded range.
+ // 4 pages before the bios, 3 pages for vmx tss pages, the
+ // other page for EPT real mode pagetable
+ add_e820(0xfffbc000, 4*4096, E820_RESERVED);
+ }
-static void
-timer_setup()
-{
- u32 seconds = bcd2bin(inb_cmos(CMOS_RTC_SECONDS));
- u32 ticks = (seconds * 18206507) / 1000000;
- u32 minutes = bcd2bin(inb_cmos(CMOS_RTC_MINUTES));
- ticks += (minutes * 10923904) / 10000;
- u32 hours = bcd2bin(inb_cmos(CMOS_RTC_HOURS));
- ticks += (hours * 65543427) / 1000;
- bda->timer_counter = ticks;
- bda->timer_rollover = 0;
+ dprintf(1, "Ram Size=0x%08x (0x%08x%08x high)\n"
+ , RamSize, (u32)(RamSizeOver4G >> 32), (u32)RamSizeOver4G);
}
static void
-pic_setup()
+init_bios_tables(void)
{
- outb(0x11, PORT_PIC1);
- outb(0x11, PORT_PIC2_DATA);
- outb(0x08, PORT_PIC1_DATA);
- outb(0x70, PORT_PIC2_DATA);
- outb(0x04, PORT_PIC1_DATA);
- outb(0x02, PORT_PIC2_DATA);
- outb(0x01, PORT_PIC1_DATA);
- outb(0x01, PORT_PIC2_DATA);
- outb(0xb8, PORT_PIC1_DATA);
- if (CONFIG_PS2_MOUSE)
- outb(0x8f, PORT_PIC2_DATA);
- else
- outb(0x9f, PORT_PIC2_DATA);
-}
+ if (CONFIG_COREBOOT) {
+ coreboot_copy_biostable();
+ return;
+ }
+ if (usingXen()) {
+ xen_copy_biostables();
+ return;
+ }
-static void
-floppy_drive_post()
-{
- u8 type = inb_cmos(CMOS_FLOPPY_DRIVE_TYPE);
- u8 out = 0;
- if (type & 0xf0)
- out |= 0x07;
- if (type & 0x0f)
- out |= 0x70;
- bda->floppy_harddisk_info = out;
- outb(0x02, PORT_DMA1_MASK_REG);
-
- bda->ivecs[0x1E].offset = OFFSET_diskette_param_table2;
-}
+ create_pirtable();
-static void
-cdemu_init()
-{
- //ebda->cdemu.active = 0;
-}
+ mptable_init();
-static void
-ata_init()
-{
+ smbios_init();
+
+ acpi_bios_init();
}
+// Initialize hardware devices
static void
-ata_detect()
+init_hw(void)
{
+ usb_setup();
+ ps2port_setup();
+ lpt_setup();
+ serial_setup();
+
+ floppy_setup();
+ ata_setup();
+ ahci_setup();
+ cbfs_payload_setup();
+ ramdisk_setup();
+ virtio_blk_setup();
}
-static void
-hard_drive_post()
+// 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.
static void
-init_boot_vectors()
+maininit(void)
{
-}
+ // Running at new code address - do code relocation fixups
+ malloc_fixupreloc();
-static void __attribute__((noinline))
-call16(u16 seg, u16 offset)
-{
- u32 segoff = (seg << 16) | offset;
- asm volatile(
- "pushal\n" // Save registers
- "ljmp $0x20, %0\n" // Jump to 16bit transition code
- ".globl call16_resume\n"
- "call16_resume:\n" // point of return
- "popal\n" // restore registers
- : : "Z" (OFFSET_call16), "b" (segoff));
-}
+ // Setup ivt/bda/ebda
+ init_ivt();
+ init_bda();
-static int
-checksum(u8 *p, u32 len)
-{
- u32 i;
- u8 sum = 0;
- for (i=0; i<len; i++)
- sum += p[i];
- return sum;
+ // Init base pc hardware.
+ pic_setup();
+ timer_setup();
+ mathcp_setup();
+
+ // Initialize mtrr
+ mtrr_setup();
+
+ // Initialize pci
+ pci_setup();
+ smm_init();
+
+ // Setup Xen hypercalls
+ xen_init_hypercalls();
+
+ // Initialize internal tables
+ boot_setup();
+
+ // Start hardware initialization (if optionrom threading)
+ if (CONFIG_THREADS && CONFIG_THREAD_OPTIONROMS)
+ init_hw();
+
+ // Find and initialize other cpus
+ smp_probe();
+
+ // 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)
+ if (!CONFIG_THREADS || !CONFIG_THREAD_OPTIONROMS) {
+ init_hw();
+ wait_threads();
+ }
+
+ // 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();
}
-#define PTR_TO_SEG(p) ((((u32)(p)) >> 4) & 0xf000)
-#define PTR_TO_OFFSET(p) (((u32)(p)) & 0xffff)
+/****************************************************************
+ * POST entry and code relocation
+ ****************************************************************/
+
+// Update given relocs for the code at 'dest' with a given 'delta'
static void
-rom_scan()
+updateRelocs(void *dest, u32 *rstart, u32 *rend, u32 delta)
{
- u8 *p = (u8*)0xc0000;
- for (; p <= (u8*)0xe0000; p += 2048) {
- u8 *rom = p;
- if (*(u16*)rom != 0xaa55)
- continue;
- u32 len = rom[2] * 512;
- if (checksum(rom, len) != 0)
- continue;
- p = (u8*)(((u32)p + len) / 2048 * 2048);
- call16(PTR_TO_SEG(rom), PTR_TO_OFFSET(rom + 3));
-
- // Look at the ROM's PnP Expansion header. Properly, we're supposed
- // to init all the ROMs and then go back and build an IPL table of
- // all the bootable devices, but we can get away with one pass.
- if (rom[0x1a] != '$' || rom[0x1b] != 'P'
- || rom[0x1c] != 'n' || rom[0x1d] != 'P')
- continue;
- // 0x1A is also the offset into the expansion header of...
- // the Bootstrap Entry Vector, or zero if there is none.
- u16 entry = *(u16*)&rom[0x1a+0x1a];
- if (!entry)
- continue;
- // Found a device that thinks it can boot the system. Record
- // its BEV and product name string.
-
- // XXX
- }
+ u32 *reloc;
+ for (reloc = rstart; reloc < rend; reloc++)
+ *((u32*)(dest + *reloc)) += delta;
}
+// Relocate init code and then call maininit() at new address.
static void
-status_restart(u8 status)
+reloc_init(void)
{
-#if 0
- if (status == 0x05)
- eoi_jmp_post();
-#endif
-
- BX_PANIC("Unimplemented shutdown status: %02x\n",(Bit8u)status);
+ 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();
}
-static void
-post()
+// Setup for code relocation and then call reloc_init
+void VISIBLE32INIT
+dopost(void)
{
- // first reset the DMA controllers
- outb(0, PORT_DMA1_MASTER_CLEAR);
- outb(0, PORT_DMA2_MASTER_CLEAR);
+ HaveRunPost = 1;
- // then initialize the DMA controllers
- outb(0xc0, PORT_DMA2_MODE_REG);
- outb(0x00, PORT_DMA2_MASK_REG);
+ // Detect ram and setup internal malloc.
+ qemu_cfg_port_probe();
+ ram_probe();
+ malloc_setup();
- // Get and then clear CMOS shutdown status.
- u8 status = inb_cmos(CMOS_RESET_CODE);
- outb_cmos(0, CMOS_RESET_CODE);
+ // Relocate initialization code and call maininit().
+ reloc_init();
+}
- if (status != 0x00 && status != 0x09 && status < 0x0d)
- status_restart(status);
+// 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
+handle_post(void)
+{
+ debug_serial_setup();
+ dprintf(1, "Start bios (version %s)\n", VERSION);
- BX_INFO("Start bios");
+ // Enable CPU caching
+ setcr0(getcr0() & ~(CR0_CD|CR0_NW));
- init_bda();
- init_handlers();
- init_ebda();
+ // Clear CMOS reboot flag.
+ outb_cmos(0, CMOS_RESET_CODE);
- pit_setup();
- kbd_setup();
- lpt_setup();
- serial_setup();
- timer_setup();
- pic_setup();
- //pci_setup();
- init_boot_vectors();
- rom_scan();
+ // Make sure legacy DMA isn't running.
+ init_dma();
- printf("BIOS - begin\n\n");
+ // Check if we are running under Xen.
+ xen_probe();
- floppy_drive_post();
- hard_drive_post();
- if (CONFIG_ATA) {
- ata_init();
- ata_detect();
- }
- cdemu_init();
- call16(0xf000, OFFSET_begin_boot);
-}
+ // Allow writes to modify bios area (0xf0000)
+ make_bios_writable();
-void VISIBLE
-_start()
-{
- post();
+ // Now that memory is read/writable - start post process.
+ dopost();
}
projects / seabios.git / blobdiff