// Copyright (C) 2008 Kevin O'Connor <kevin@koconnor.net>
//
// This file may be distributed under the terms of the GNU GPLv3 license.
+#ifndef __BIOSVAR_H
+#define __BIOSVAR_H
#include "types.h" // u8
-#include "farptr.h" // SET_SEG
+#include "farptr.h" // GET_FARVAR
+#include "config.h" // CONFIG_*
/****************************************************************
// 30:00
// u8 stack[256];
// 40:00
- u16 port_com1, port_com2, port_com3, port_com4;
- u16 port_lpt1, port_lpt2, port_lpt3;
+ u16 port_com[4];
+ u16 port_lpt[3];
u16 ebda_seg;
// 40:10
u16 equipment_list_flags;
u16 mem_size_kb;
u8 pad2;
u8 ps2_ctrl_flag;
- u16 kbd_flag;
+ u8 kbd_flag0;
+ u8 kbd_flag1;
u8 alt_keypad;
u16 kbd_buf_head;
u16 kbd_buf_tail;
u8 floppy_motor_counter;
u8 floppy_last_status;
u8 floppy_return_status[7];
- u8 other1[0x7];
+ u8 other_49[0x7];
// 40:50
- u8 other2[0x1c];
- // 40:6c
+ u8 other_50[0x10];
+ // 40:60
+ u8 other_60[0x7];
+ u32 jump_cs_ip;
+ u8 dummy;
u32 timer_counter;
// 40:70
u8 timer_rollover;
- u8 other4[0x0f];
+ u8 break_flag;
+ u16 soft_reset_flag;
+ u8 disk_last_status;
+ u8 disk_count;
+ u8 disk_control_byte;
+ u8 port_disk;
+ u8 lpt_timeout[4];
+ u8 com_timeout[4];
// 40:80
u16 kbd_buf_start_offset;
u16 kbd_buf_end_offset;
- u8 other5[7];
+ u8 other_84[7];
u8 floppy_last_data_rate;
- u8 other6[3];
+ u8 disk_status_controller;
+ u8 disk_error_controller;
+ u8 disk_interrupt_flag;
u8 floppy_harddisk_info;
// 40:90
u8 floppy_media_state[4];
u32 user_wait_timeout;
// 40:A0
u8 rtc_wait_flag;
-} __attribute__((packed));
+} PACKED;
// BDA floppy_recalibration_status bitdefs
#define FRS_TIMEOUT (1<<7)
#define FMS_DATA_RATE_MASK (0xc0)
// Accessor functions
-#define GET_BDA(var) ({ \
- SET_SEG(ES, 0x0000); \
- GET_VAR(ES, ((struct bios_data_area_s *)0)->var); })
-#define SET_BDA(var, val) do { \
- SET_SEG(ES, 0x0000); \
- SET_VAR(ES, ((struct bios_data_area_s *)0)->var, val); \
- } while (0)
+#define GET_BDA(var) \
+ GET_FARVAR(SEG_BDA, ((struct bios_data_area_s *)0)->var)
+#define SET_BDA(var, val) \
+ SET_FARVAR(SEG_BDA, ((struct bios_data_area_s *)0)->var, (val))
#define CLEARBITS_BDA(var, val) do { \
typeof(((struct bios_data_area_s *)0)->var) __val = GET_BDA(var); \
SET_BDA(var, (__val & ~(val))); \
/****************************************************************
- * Extended Bios Data Area (EBDA)
+ * Hard drive info
****************************************************************/
-struct extended_bios_data_area_s {
- u8 size;
- u8 other1[0x3c];
+struct chs_s {
+ u16 heads; // # heads
+ u16 cylinders; // # cylinders
+ u16 spt; // # sectors / track
+};
+
+// DPTE definition
+struct dpte_s {
+ u16 iobase1;
+ u16 iobase2;
+ u8 prefix;
+ u8 unused;
+ u8 irq;
+ u8 blkcount;
+ u8 dma;
+ u8 pio;
+ u16 options;
+ u16 reserved;
+ u8 revision;
+ u8 checksum;
+};
- // FDPT - Can be splitted in data members if needed
- u8 fdpt0[0x10];
- u8 fdpt1[0x10];
+struct ata_channel_s {
+ u8 iface; // ISA or PCI
+ u16 iobase1; // IO Base 1
+ u16 iobase2; // IO Base 2
+ u8 irq; // IRQ
+};
- u8 other2[0xC4];
+struct ata_device_s {
+ u8 type; // Detected type of ata (ata/atapi/none/unknown)
+ u8 device; // Detected type of attached devices (hd/cd/none)
+ u8 removable; // Removable device flag
+ u8 lock; // Locks for removable devices
+ u8 mode; // transfer mode : PIO 16/32 bits - IRQ - ISADMA - PCIDMA
+ u16 blksize; // block size
- // ATA Driver data
- //ata_t ata;
+ u8 translation; // type of translation
+ struct chs_s lchs; // Logical CHS
+ struct chs_s pchs; // Physical CHS
-#if BX_ELTORITO_BOOT
- // El Torito Emulation data
- cdemu_t cdemu;
-#endif // BX_ELTORITO_BOOT
+ u64 sectors; // Total sectors count
+};
+
+struct ata_s {
+ // ATA channels info
+ struct ata_channel_s channels[CONFIG_MAX_ATA_INTERFACES];
+
+ // ATA devices info
+ struct ata_device_s devices[CONFIG_MAX_ATA_DEVICES];
+ //
+ // map between bios hd/cd id and ata channels
+ u8 hdcount, cdcount;
+ u8 idmap[2][CONFIG_MAX_ATA_DEVICES];
+
+ // Buffer for DPTE table
+ struct dpte_s dpte;
+
+ // Count of transferred sectors and bytes
+ u16 trsfsectors;
+};
+
+// ElTorito Device Emulation data
+struct cdemu_s {
+ u8 active;
+ u8 media;
+ u8 emulated_drive;
+ u8 controller_index;
+ u16 device_spec;
+ u32 ilba;
+ u16 buffer_segment;
+ u16 load_segment;
+ u16 sector_count;
+
+ // Virtual device
+ struct chs_s vdevice;
};
/****************************************************************
- * Extended Bios Data Area (EBDA)
+ * Initial Program Load (IPL)
****************************************************************/
-#define UREG(ER, R, RH, RL) union { u32 ER; struct { u16 R; u16 R ## _hi; }; struct { u8 RL; u8 RH; u8 R ## _hilo; u8 R ## _hihi; }; }
-
-struct bregs {
- u16 ds;
- u16 es;
- UREG(edi, di, di_hi, di_lo);
- UREG(esi, si, si_hi, si_lo);
- UREG(ebp, bp, bp_hi, bp_lo);
- UREG(esp, sp, sp_hi, sp_lo);
- UREG(ebx, bx, bh, bl);
- UREG(edx, dx, dh, dl);
- UREG(ecx, cx, ch, cl);
- UREG(eax, ax, ah, al);
- u16 ip;
- u16 cs;
+struct ipl_entry_s {
+ u16 type;
u16 flags;
-} __attribute__((packed));
+ u32 vector;
+ u32 description;
+};
-// bregs flags bitdefs
-#define F_CF (1<<9)
+struct ipl_s {
+ struct ipl_entry_s table[8];
+ u16 count;
+ u16 sequence;
+ u32 bootorder;
+ u8 checkfloppysig;
+};
-static inline void
-set_cf(struct bregs *regs, int cond)
-{
- if (cond)
- regs->flags |= F_CF;
- else
- regs->flags &= ~F_CF;
-}
+#define IPL_TYPE_FLOPPY 0x01
+#define IPL_TYPE_HARDDISK 0x02
+#define IPL_TYPE_CDROM 0x03
+#define IPL_TYPE_BEV 0x80
/****************************************************************
- * Bios Config Table
+ * Extended Bios Data Area (EBDA)
****************************************************************/
-struct bios_config_table_s {
- // XXX
- u8 x;
-};
+struct fdpt_s {
+ u16 cylinders;
+ u8 heads;
+ u8 a0h_signature;
+ u8 phys_sectors;
+ u16 precompensation;
+ u8 reserved;
+ u8 drive_control_byte;
+ u16 phys_cylinders;
+ u8 phys_heads;
+ u16 landing_zone;
+ u8 sectors;
+ u8 checksum;
+} PACKED;
-extern struct bios_config_table_s BIOS_CONFIG_TABLE;
+struct extended_bios_data_area_s {
+ u8 size;
+ u8 reserved1[0x21];
+ u32 far_call_pointer;
+ u8 mouse_flag1;
+ u8 mouse_flag2;
+ u8 mouse_data[0x08];
+ // 0x30
+ u8 other1[0x0d];
+
+ // 0x3d
+ struct fdpt_s fdpt[2];
+
+ // 0x5d
+ u8 other2[0xC4];
+
+ u8 ps2ctr;
+
+ // Physical memory available.
+ u32 ram_size;
+ u16 e820_count;
+ u32 e820_loc;
+ u32 pir_loc;
+
+ // ATA Driver data
+ struct ata_s ata;
+
+ // El Torito Emulation data
+ struct cdemu_s cdemu;
+
+ // Initial program load
+ struct ipl_s ipl;
+} PACKED;
+
+#define EBDA_SIZE DIV_ROUND_UP(sizeof(struct extended_bios_data_area_s), 1024)
+#define BASE_MEM_IN_K (640 - EBDA_SIZE)
+
+// Accessor functions
+#define GET_EBDA(var) \
+ GET_FARVAR(SEG_EBDA, ((struct extended_bios_data_area_s *)0)->var)
+#define SET_EBDA(var, val) \
+ SET_FARVAR(SEG_EBDA, ((struct extended_bios_data_area_s *)0)->var, (val))
/****************************************************************
- * Memory layout info
+ * Bios Config Table
****************************************************************/
-#define SEG_BIOS 0xf000
+struct bios_config_table_s {
+ u16 size;
+ u8 model;
+ u8 submodel;
+ u8 biosrev;
+ u8 feature1, feature2, feature3, feature4, feature5;
+} PACKED;
+
+extern struct bios_config_table_s BIOS_CONFIG_TABLE;
-#define EBDA_SEG 0x9FC0
-#define EBDA_SIZE 1 // In KiB
-#define BASE_MEM_IN_K (640 - EBDA_SIZE)
+#endif // __BIOSVAR_H
projects / seabios.git / blobdiff