#include "cmos.h" // CMOS_*
#include "util.h" // memset
#include "biosvar.h" // struct bios_data_area_s
+#include "ata.h"
+#include "kbd.h"
#define bda ((struct bios_data_area_s *)0)
#define ebda ((struct extended_bios_data_area_s *)(EBDA_SEG<<4))
-#define ipl ((struct ipl_s *)(IPL_SEG<<4))
-
-static u8
-checksum(u8 *p, u32 len)
-{
- u32 i;
- u8 sum = 0;
- for (i=0; i<len; i++)
- sum += p[i];
- return sum;
-}
static void
init_bda()
int i;
for (i=0; i<256; i++) {
- bda->ivecs[i].seg = SEG_BIOS;
- bda->ivecs[i].offset = OFFSET_dummy_iret_handler;
+ SET_BDA(ivecs[i].seg, SEG_BIOS);
+ SET_BDA(ivecs[i].offset, OFFSET_dummy_iret_handler);
}
- bda->mem_size_kb = BASE_MEM_IN_K;
+ SET_BDA(mem_size_kb, BASE_MEM_IN_K);
// mov CMOS Equipment Byte to BDA Equipment Word
- bda->equipment_list_flags = inb_cmos(CMOS_EQUIPMENT_INFO);
+ SET_BDA(equipment_list_flags, inb_cmos(CMOS_EQUIPMENT_INFO));
}
static void
{
// 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_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);
}
static void
{
memset(ebda, 0, sizeof(*ebda));
ebda->size = EBDA_SIZE;
- bda->ebda_seg = EBDA_SEG;
- bda->ivecs[0x41].seg = EBDA_SEG;
- bda->ivecs[0x41].offset = offsetof(struct extended_bios_data_area_s, fdpt0);
- bda->ivecs[0x46].seg = EBDA_SEG;
- bda->ivecs[0x41].offset = offsetof(struct extended_bios_data_area_s, fdpt1);
+ SET_BDA(ebda_seg, EBDA_SEG);
+ SET_BDA(ivecs[0x41].seg, EBDA_SEG);
+ SET_BDA(ivecs[0x41].offset
+ , offsetof(struct extended_bios_data_area_s, fdpt0));
+ SET_BDA(ivecs[0x46].seg, EBDA_SEG);
+ SET_BDA(ivecs[0x41].offset
+ , offsetof(struct extended_bios_data_area_s, fdpt1));
}
static void
outb(0x0, PORT_PIT_COUNTER0);
}
-//--------------------------------------------------------------------------
-// keyboard_panic
-//--------------------------------------------------------------------------
-static void
-keyboard_panic(u16 status)
-{
- // If you're getting a 993 keyboard panic here,
- // please see the comment in keyboard_init
-
- BX_PANIC("Keyboard error:%u\n",status);
-}
-
-static void
-kbd_flush(u8 code)
-{
- u16 max = 0xffff;
- while ((inb(PORT_PS2_STATUS) & 0x02) && (--max > 0))
- outb(code, PORT_DIAG);
- if (!max && code != 0xff)
- keyboard_panic(code);
-}
-
-static void
-kbd_waitdata(u8 code)
-{
- u16 max = 0xffff;
- while ( ((inb(PORT_PS2_STATUS) & 0x01) == 0) && (--max>0) )
- outb(code, PORT_DIAG);
- if (!max)
- keyboard_panic(code);
-}
-
-//--------------------------------------------------------------------------
-// keyboard_init
-//--------------------------------------------------------------------------
-// this file is based on LinuxBIOS implementation of keyboard.c
-// could convert to #asm to gain space
-static void
-keyboard_init()
-{
- /* ------------------- Flush buffers ------------------------*/
- /* Wait until buffer is empty */
- kbd_flush(0xff);
-
- /* flush incoming keys */
- u16 max=0x2000;
- while (--max > 0) {
- outb(0x00, PORT_DIAG);
- if (inb(PORT_PS2_STATUS) & 0x01) {
- inb(PORT_PS2_DATA);
- max = 0x2000;
- }
- }
-
- // Due to timer issues, and if the IPS setting is > 15000000,
- // the incoming keys might not be flushed here. That will
- // cause a panic a few lines below. See sourceforge bug report :
- // [ 642031 ] FATAL: Keyboard RESET error:993
-
- /* ------------------- controller side ----------------------*/
- /* send cmd = 0xAA, self test 8042 */
- outb(0xaa, PORT_PS2_STATUS);
-
- kbd_flush(0x00);
- kbd_waitdata(0x01);
-
- /* read self-test result, 0x55 should be returned from 0x60 */
- if (inb(PORT_PS2_DATA) != 0x55)
- keyboard_panic(991);
-
- /* send cmd = 0xAB, keyboard interface test */
- outb(0xab, PORT_PS2_STATUS);
-
- kbd_flush(0x10);
- kbd_waitdata(0x11);
-
- /* read keyboard interface test result, */
- /* 0x00 should be returned form 0x60 */
- if (inb(PORT_PS2_DATA) != 0x00)
- keyboard_panic(992);
-
- /* Enable Keyboard clock */
- outb(0xae, PORT_PS2_STATUS);
- outb(0xa8, PORT_PS2_STATUS);
-
- /* ------------------- keyboard side ------------------------*/
- /* reset kerboard and self test (keyboard side) */
- outb(0xff, PORT_PS2_DATA);
-
- kbd_flush(0x20);
- kbd_waitdata(0x21);
-
- /* keyboard should return ACK */
- if (inb(PORT_PS2_DATA) != 0xfa)
- keyboard_panic(993);
-
- kbd_waitdata(0x31);
-
- if (inb(PORT_PS2_DATA) != 0xaa)
- keyboard_panic(994);
-
- /* Disable keyboard */
- outb(0xf5, PORT_PS2_DATA);
-
- kbd_flush(0x40);
- kbd_waitdata(0x41);
-
- /* keyboard should return ACK */
- if (inb(PORT_PS2_DATA) != 0xfa)
- keyboard_panic(995);
-
- /* Write Keyboard Mode */
- outb(0x60, PORT_PS2_STATUS);
-
- kbd_flush(0x50);
-
- /* send cmd: scan code convert, disable mouse, enable IRQ 1 */
- outb(0x61, PORT_PS2_DATA);
-
- kbd_flush(0x60);
-
- /* Enable keyboard */
- outb(0xf4, PORT_PS2_DATA);
-
- kbd_flush(0x70);
- kbd_waitdata(0x71);
-
- /* keyboard should return ACK */
- if (inb(PORT_PS2_DATA) != 0xfa)
- keyboard_panic(996);
-
- outb(0x77, PORT_DIAG);
-}
-
-static void
-kbd_setup()
-{
- bda->kbd_mode = 0x10;
- bda->kbd_buf_head = bda->kbd_buf_tail = bda->kbd_buf_start_offset
- = offsetof(struct bios_data_area_s, kbd_buf) - 0x400;
- bda->kbd_buf_end_offset
- = (offsetof(struct bios_data_area_s, kbd_buf[sizeof(bda->kbd_buf)])
- - 0x400);
- keyboard_init();
-}
-
static u16
detect_parport(u16 port, u8 timeout, u8 count)
{
if (inb(port) != 0xaa)
// Not present
return 0;
- bda->port_lpt[count] = port;
- bda->lpt_timeout[count] = timeout;
+ SET_BDA(port_lpt[count], port);
+ SET_BDA(lpt_timeout[count], timeout);
return 1;
}
count += detect_parport(0x278, 0x14, count);
// Equipment word bits 14..15 determing # parallel ports
- u16 eqb = bda->equipment_list_flags;
- bda->equipment_list_flags = (eqb & 0x3fff) | (count << 14);
+ u16 eqb = GET_BDA(equipment_list_flags);
+ SET_BDA(equipment_list_flags, (eqb & 0x3fff) | (count << 14));
}
static u16
if (inb(port+2) != 0x02)
return 0;
outb(0x00, port+1);
- bda->port_com[count] = port;
- bda->com_timeout[count] = timeout;
+ SET_BDA(port_com[count], port);
+ SET_BDA(com_timeout[count], timeout);
return 1;
}
count += detect_serial(0x2e8, 0x0a, count);
// Equipment word bits 9..11 determing # serial ports
- u16 eqb = bda->equipment_list_flags;
- bda->equipment_list_flags = (eqb & 0xf1ff) | (count << 9);
+ u16 eqb = GET_BDA(equipment_list_flags);
+ SET_BDA(equipment_list_flags, (eqb & 0xf1ff) | (count << 9));
}
static u32
ticks += (minutes * 10923904) / 10000;
u32 hours = bcd2bin(inb_cmos(CMOS_RTC_HOURS));
ticks += (hours * 65543427) / 1000;
- bda->timer_counter = ticks;
- bda->timer_rollover = 0;
+ SET_BDA(timer_counter, ticks);
+ SET_BDA(timer_rollover, 0);
}
static void
out |= 0x07;
if (type & 0x0f)
out |= 0x70;
- bda->floppy_harddisk_info = out;
+ SET_BDA(floppy_harddisk_info, out);
outb(0x02, PORT_DMA1_MASK_REG);
- bda->ivecs[0x1E].offset = OFFSET_diskette_param_table2;
+ SET_BDA(ivecs[0x1E].offset, OFFSET_diskette_param_table2);
}
static void
}
info->cylinders = cyl;
info->heads = heads;
- info->checksum = ~checksum((u8*)info, sizeof(*info)-1) + 1;
+ info->checksum = -checksum((u8*)info, sizeof(*info)-1);
}
static void
hard_drive_post()
{
outb(0x0a, 0x03f6); // 0000 1010 = reserved, disable IRQ 14
- bda->disk_count = 1;
- bda->disk_control_byte = 0xc0;
+ SET_BDA(disk_count, 1);
+ SET_BDA(disk_control_byte, 0xc0);
// move disk geometry data from CMOS to EBDA disk parameter table(s)
u8 diskinfo = inb_cmos(CMOS_DISK_DATA);
static void
init_boot_vectors()
{
- // Clear out the IPL table.
- memset(ipl, 0, sizeof(*ipl));
-
// Floppy drive
- struct ipl_entry_s *ip = &ipl->table[0];
+ struct ipl_entry_s *ip = &ebda->ipl.table[0];
ip->type = IPL_TYPE_FLOPPY;
ip++;
ip++;
}
- ipl->count = ip - ipl->table;
- ipl->sequence = 0xffff;
+ ebda->ipl.count = ip - ebda->ipl.table;
+ ebda->ipl.sequence = 0xffff;
}
static void
if (checksum(rom, len) != 0)
continue;
p = (u8*)(((u32)p + len) / 2048 * 2048);
- callrom(PTR_TO_SEG(rom), PTR_TO_OFFSET(rom + 3));
+ 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
// Found a device that thinks it can boot the system. Record
// its BEV and product name string.
- if (ipl->count >= ARRAY_SIZE(ipl->table))
+ if (ebda->ipl.count >= ARRAY_SIZE(ebda->ipl.table))
continue;
- struct ipl_entry_s *ip = &ipl->table[ipl->count];
+ struct ipl_entry_s *ip = &ebda->ipl.table[ebda->ipl.count];
ip->type = IPL_TYPE_BEV;
- ip->vector = (PTR_TO_SEG(rom) << 16) | entry;
+ ip->vector = (FARPTR_TO_SEG(rom) << 16) | entry;
u16 desc = *(u16*)&rom[0x1a+0x10];
if (desc)
- ip->description = (PTR_TO_SEG(rom) << 16) | desc;
+ ip->description = (FARPTR_TO_SEG(rom) << 16) | desc;
- ipl->count++;
+ ebda->ipl.count++;
}
}
printf("BIOS - begin\n\n");
- // XXX - need to do pci stuff
- //pci_setup();
+ // clear bss section -- XXX - shouldn't use globals
+ extern char __bss_start[], __bss_end[];
+ memset(__bss_start, 0, __bss_end - __bss_start);
+
+ rombios32_init();
+
init_boot_vectors();
floppy_drive_post();
hard_drive_post();
- if (CONFIG_ATA)
+ if (CONFIG_ATA) {
ata_init();
+ ata_detect();
+ }
init_boot_vectors();
+
rom_scan(0xc8000, 0xe0000);
- callrom(SEG_BIOS, OFFSET_begin_boot);
+ // 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);
}
static void
eoi_both_pics();
struct bregs br;
memset(&br, 0, sizeof(br));
- br.cs = bda->jump_cs_ip >> 16;
- br.ip = bda->jump_cs_ip;
+ br.cs = GET_BDA(jump_cs_ip) >> 16;
+ br.ip = GET_BDA(jump_cs_ip);
call16(&br);
}
projects / seabios.git / blobdiff