// Copyright (C) 2008 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
-#include "ata.h" // ata_detect
-#include "kbd.h" // kbd_setup
#include "disk.h" // floppy_drive_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 "boot.h" // IPL
+
+void
+__set_irq(int vector, void *loc)
+{
+ SET_IVT(vector, SEG_BIOS, (u32)loc - BUILD_BIOS_ADDR);
+}
-#define bda ((struct bios_data_area_s *)MAKE_FARPTR(SEG_BDA, 0))
-#define ebda ((struct extended_bios_data_area_s *)MAKE_FARPTR(SEG_EBDA, 0))
+#define set_irq(vector, func) do { \
+ extern void func (void); \
+ __set_irq(vector, func); \
+ } while (0)
static void
-init_bda()
+init_ivt()
{
- memset(bda, 0, sizeof(*bda));
+ dprintf(3, "init ivt\n");
+ // Initialize all vectors to a dummy handler.
int i;
- for (i=0; i<256; i++) {
- SET_BDA(ivecs[i].seg, SEG_BIOS);
- SET_BDA(ivecs[i].offset, OFFSET_dummy_iret_handler);
- }
-
- SET_BDA(mem_size_kb, BASE_MEM_IN_K);
+ for (i=0; i<256; i++)
+ set_irq(i, dummy_iret_handler);
+
+ // Initialize all hw vectors to a default hw handler.
+ for (i=0x08; i<=0x0f; i++)
+ set_irq(i, entry_hwpic1);
+ for (i=0x70; i<=0x77; i++)
+ set_irq(i, entry_hwpic2);
+
+ // Initialize software handlers.
+ set_irq(0x10, entry_10);
+ set_irq(0x11, entry_11_official);
+ set_irq(0x12, entry_12_official);
+ set_irq(0x13, entry_13_official);
+ set_irq(0x14, entry_14);
+ set_irq(0x15, entry_15);
+ set_irq(0x16, entry_16);
+ set_irq(0x17, entry_17);
+ set_irq(0x18, entry_18);
+ set_irq(0x19, entry_19_official);
+ set_irq(0x1a, entry_1a);
+ set_irq(0x1c, entry_1c);
+ set_irq(0x40, entry_40);
- // mov CMOS Equipment Byte to BDA Equipment Word
- SET_BDA(equipment_list_flags, inb_cmos(CMOS_EQUIPMENT_INFO));
-}
-
-static void
-init_handlers()
-{
// set vector 0x79 to zero
// this is used by 'gardian angel' protection system
- SET_BDA(ivecs[0x79].seg, 0);
- SET_BDA(ivecs[0x79].offset, 0);
-
- SET_BDA(ivecs[0x40].offset, OFFSET_entry_40);
- SET_BDA(ivecs[0x0e].offset, OFFSET_entry_0e);
- SET_BDA(ivecs[0x13].offset, OFFSET_entry_13);
- SET_BDA(ivecs[0x76].offset, OFFSET_entry_76);
- SET_BDA(ivecs[0x17].offset, OFFSET_entry_17);
- SET_BDA(ivecs[0x18].offset, OFFSET_entry_18);
- SET_BDA(ivecs[0x19].offset, OFFSET_entry_19);
- SET_BDA(ivecs[0x1c].offset, OFFSET_entry_1c);
- SET_BDA(ivecs[0x12].offset, OFFSET_entry_12);
- SET_BDA(ivecs[0x11].offset, OFFSET_entry_11);
- SET_BDA(ivecs[0x15].offset, OFFSET_entry_15);
- SET_BDA(ivecs[0x08].offset, OFFSET_entry_08);
- SET_BDA(ivecs[0x09].offset, OFFSET_entry_09);
- SET_BDA(ivecs[0x16].offset, OFFSET_entry_16);
- SET_BDA(ivecs[0x14].offset, OFFSET_entry_14);
- SET_BDA(ivecs[0x1a].offset, OFFSET_entry_1a);
- SET_BDA(ivecs[0x70].offset, OFFSET_entry_70);
- SET_BDA(ivecs[0x74].offset, OFFSET_entry_74);
- SET_BDA(ivecs[0x75].offset, OFFSET_entry_75);
- SET_BDA(ivecs[0x10].offset, OFFSET_entry_10);
-
- SET_BDA(ivecs[0x1E].offset, OFFSET_diskette_param_table2);
+ SET_IVT(0x79, 0, 0);
+
+ __set_irq(0x1E, &diskette_param_table2);
}
static void
-init_ebda()
+init_bda()
{
+ dprintf(3, "init bda\n");
+
+ struct bios_data_area_s *bda = MAKE_FARPTR(SEG_BDA, 0);
+ memset(bda, 0, sizeof(*bda));
+
+ int esize = DIV_ROUND_UP(sizeof(struct extended_bios_data_area_s), 1024);
+ SET_BDA(mem_size_kb, 640 - esize);
+ u16 eseg = FARPTR_TO_SEG((640 - esize) * 1024);
+ SET_BDA(ebda_seg, eseg);
+
+ struct extended_bios_data_area_s *ebda = get_ebda_ptr();
memset(ebda, 0, sizeof(*ebda));
- ebda->size = EBDA_SIZE;
- SET_BDA(ebda_seg, SEG_EBDA);
- SET_BDA(ivecs[0x41].seg, SEG_EBDA);
- SET_BDA(ivecs[0x41].offset
- , offsetof(struct extended_bios_data_area_s, fdpt[0]));
- SET_BDA(ivecs[0x46].seg, SEG_EBDA);
- SET_BDA(ivecs[0x41].offset
- , offsetof(struct extended_bios_data_area_s, fdpt[1]));
+ ebda->size = esize;
+ SET_IVT(0x41, eseg, offsetof(struct extended_bios_data_area_s, fdpt[0]));
+ SET_IVT(0x46, eseg, offsetof(struct extended_bios_data_area_s, fdpt[1]));
}
static void
-pit_setup()
+ram_probe(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, "Find memory size\n");
+ if (CONFIG_COREBOOT) {
+ coreboot_fill_map();
+ } 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)
+ | (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(0xa0000, 0x50000, E820_HOLE);
-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;
- SET_BDA(timer_counter, ticks);
- SET_BDA(timer_rollover, 0);
+ // Mark known areas as reserved.
+ u16 ebda_seg = get_ebda_seg();
+ add_e820((u32)MAKE_FARPTR(ebda_seg, 0), GET_EBDA2(ebda_seg, size) * 1024
+ , E820_RESERVED);
+ add_e820(BUILD_BIOS_ADDR, BUILD_BIOS_SIZE, E820_RESERVED);
+
+ if (CONFIG_KVM)
+ // 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);
+
+ dprintf(1, "Ram Size=0x%08x\n", RamSize);
}
static void
-pic_setup()
+init_bios_tables(void)
{
- outb(0x11, PORT_PIC1);
- outb(0x11, PORT_PIC2);
- 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)
+ // XXX - not supported on coreboot yet.
+ return;
+
+ create_pirtable();
+
+ mptable_init();
+
+ smbios_init();
+
+ acpi_bios_init();
}
static void
init_boot_vectors()
{
+ if (! CONFIG_BOOT)
+ return;
+ dprintf(3, "init boot device ordering\n");
+
// Floppy drive
- struct ipl_entry_s *ip = &ebda->ipl.table[0];
+ struct ipl_entry_s *ip = &IPL.table[0];
ip->type = IPL_TYPE_FLOPPY;
ip++;
ip++;
}
- ebda->ipl.count = ip - ebda->ipl.table;
- ebda->ipl.sequence = 0xffff;
- ebda->ipl.bootfirst = 0xffff;
-}
-
-static void
-callrom(u16 seg, u16 offset)
-{
- struct bregs br;
- memset(&br, 0, sizeof(br));
- br.es = SEG_BIOS;
- br.di = OFFSET_pnp_string + 1; // starts 1 past for alignment
- br.cs = seg;
- br.ip = offset;
- call16(&br);
-}
-
-static void
-rom_scan(u32 start, u32 end)
-{
- u8 *p = (u8*)start;
- for (; p <= (u8*)end; 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);
- callrom(FARPTR_TO_SEG(rom), FARPTR_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.
-
- if (ebda->ipl.count >= ARRAY_SIZE(ebda->ipl.table))
- continue;
-
- struct ipl_entry_s *ip = &ebda->ipl.table[ebda->ipl.count];
- ip->type = IPL_TYPE_BEV;
- ip->vector = (FARPTR_TO_SEG(rom) << 16) | entry;
-
- u16 desc = *(u16*)&rom[0x1a+0x10];
- if (desc)
- ip->description = (u32)MAKE_FARPTR(FARPTR_TO_SEG(rom), desc);
-
- ebda->ipl.count++;
+ IPL.count = ip - IPL.table;
+ SET_EBDA(boot_sequence, 0xffff);
+ if (CONFIG_COREBOOT) {
+ // XXX - hardcode defaults for coreboot.
+ IPL.bootorder = 0x00000231;
+ IPL.checkfloppysig = 1;
+ } else {
+ // On emulators, get boot order from nvram.
+ IPL.bootorder = (inb_cmos(CMOS_BIOS_BOOTFLAG2)
+ | ((inb_cmos(CMOS_BIOS_BOOTFLAG1) & 0xf0) << 4));
+ if (!(inb_cmos(CMOS_BIOS_BOOTFLAG1) & 1))
+ IPL.checkfloppysig = 1;
}
}
+// Main setup code.
static void
post()
{
- BX_INFO("Start bios\n");
-
+ init_ivt();
init_bda();
- init_handlers();
- init_ebda();
- pit_setup();
- kbd_setup();
- lpt_setup();
- serial_setup();
- timer_setup();
pic_setup();
+ timer_setup();
+ mathcp_setup();
- rom_scan(0xc0000, 0xc7800);
+ smp_probe_setup();
- printf("BIOS - begin\n\n");
+ memmap_setup();
+ ram_probe();
+ mtrr_setup();
- // clear bss section -- XXX - shouldn't use globals
- extern char __bss_start[], __bss_end[];
- memset(__bss_start, 0, __bss_end - __bss_start);
+ pnp_setup();
+ vga_setup();
- rombios32_init();
+ kbd_setup();
+ lpt_setup();
+ serial_setup();
+ mouse_setup();
+
+ pci_bios_setup();
+ smm_init();
+
+ init_bios_tables();
+ memmap_finalize();
floppy_drive_setup();
hard_drive_setup();
init_boot_vectors();
- rom_scan(0xc8000, 0xe0000);
-
- interactive_bootmenu();
-
- // reset the memory (some boot loaders such as syslinux suppose
- // that the memory is set to zero)
- memset((void*)0x40000, 0, 0x40000); // XXX - shouldn't use globals
-
- // Invoke int 19 to start boot process.
- struct bregs br;
- memset(&br, 0, sizeof(br));
- call16_int(0x19, &br);
+ optionrom_setup();
}
-static void
-init_dma()
+// 32-bit entry point.
+void VISIBLE32
+_start()
{
- // first reset the DMA controllers
- outb(0, PORT_DMA1_MASTER_CLEAR);
- outb(0, PORT_DMA2_MASTER_CLEAR);
+ init_dma();
- // then initialize the DMA controllers
- outb(0xc0, PORT_DMA2_MODE_REG);
- outb(0x00, PORT_DMA2_MASK_REG);
-}
+ debug_serial_setup();
+ dprintf(1, "Start bios\n");
-static void
-check_restart_status()
-{
- // Get and then clear CMOS shutdown status.
- u8 status = inb_cmos(CMOS_RESET_CODE);
- outb_cmos(0, CMOS_RESET_CODE);
+ // Allow writes to modify bios area (0xf0000)
+ make_bios_writable();
- if (status == 0x00 || status == 0x09 || status >= 0x0d)
- // Normal post
- return;
+ // Perform main setup code.
+ post();
- if (status != 0x05) {
- BX_PANIC("Unimplemented shutdown status: %02x\n", status);
- return;
- }
+ // Present the user with a bootup menu.
+ interactive_bootmenu();
+
+ // Setup bios checksum.
+ extern char bios_checksum;
+ bios_checksum = -checksum((u8*)BUILD_BIOS_ADDR, BUILD_BIOS_SIZE - 1);
- // XXX - this is supposed to jump without changing any memory -
- // but the stack has been altered by the time the code gets here.
- eoi_both_pics();
+ // Prep for boot process.
+ make_bios_readonly();
+
+ // Invoke int 19 to start boot process.
+ dprintf(3, "Jump to int19\n");
struct bregs br;
memset(&br, 0, sizeof(br));
- br.cs = GET_BDA(jump_cs_ip) >> 16;
- br.ip = GET_BDA(jump_cs_ip);
- call16(&br);
+ call16_int(0x19, &br);
}
-void VISIBLE32
-_start()
-{
- init_dma();
- check_restart_status();
-
- post();
-}
+// Ughh - some older gcc compilers have a bug which causes VISIBLE32
+// functions to not be exported as a global variable - force _start
+// to be global here.
+asm(".global _start");
projects / seabios.git / blobdiff