#define __BIOSVAR_H
#include "types.h" // u8
-#include "farptr.h" // SET_SEG
+#include "farptr.h" // GET_FARVAR
#include "config.h" // CONFIG_*
u8 floppy_motor_counter;
u8 floppy_last_status;
u8 floppy_return_status[7];
- u8 other1[0x7];
+ u8 other_49[0x7];
// 40:50
- u8 other2[0x10];
+ u8 other_50[0x10];
// 40:60
- u8 other3[0x7];
+ u8 other_60[0x7];
u32 jump_cs_ip;
u8 dummy;
u32 timer_counter;
// 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 disk_status_controller;
u8 disk_error_controller;
// Accessor functions
#define GET_BDA(var) \
- GET_FARVAR(0x0000, ((struct bios_data_area_s *)0)->var)
+ GET_FARVAR(SEG_BDA, ((struct bios_data_area_s *)0)->var)
#define SET_BDA(var, val) \
- SET_FARVAR(0x0000, ((struct bios_data_area_s *)0)->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))); \
* Hard drive info
****************************************************************/
-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;
-
struct chs_s {
u16 heads; // # heads
u16 cylinders; // # cylinders
u16 iobase1; // IO Base 1
u16 iobase2; // IO Base 2
u8 irq; // IRQ
-} PACKED;
+};
struct ata_device_s {
u8 type; // Detected type of ata (ata/atapi/none/unknown)
struct chs_s lchs; // Logical CHS
struct chs_s pchs; // Physical CHS
- u32 sectors; // Total sectors count
-} PACKED;
+ u64 sectors; // Total sectors count
+};
struct ata_s {
// ATA channels info
// Count of transferred sectors and bytes
u16 trsfsectors;
- u32 trsfbytes;
-} PACKED;
+};
// ElTorito Device Emulation data
struct cdemu_s {
// Virtual device
struct chs_s vdevice;
-} PACKED;
-
-
-/****************************************************************
- * Extended Bios Data Area (EBDA)
- ****************************************************************/
-
-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 fdpt0;
- struct fdpt_s fdpt1;
-
- u8 other2[0xC4];
-
- // ATA Driver data
- struct ata_s ata;
-
- // El Torito Emulation data
- struct cdemu_s cdemu;
-} PACKED;
-
-// Accessor functions
-#define GET_EBDA(var) \
- GET_FARVAR(EBDA_SEG, ((struct extended_bios_data_area_s *)0)->var)
-#define SET_EBDA(var, val) \
- SET_FARVAR(EBDA_SEG, ((struct extended_bios_data_area_s *)0)->var, (val))
+};
/****************************************************************
* Initial Program Load (IPL)
****************************************************************/
-// XXX - is this a standard, or just a bochs bios thing?
-
struct ipl_entry_s {
u16 type;
u16 flags;
u32 vector;
u32 description;
- u32 reserved;
};
struct ipl_s {
struct ipl_entry_s table[8];
u16 count;
u16 sequence;
- u8 pad[124];
+ u32 bootorder;
+ u8 checkfloppysig;
};
#define IPL_TYPE_FLOPPY 0x01
#define IPL_TYPE_CDROM 0x03
#define IPL_TYPE_BEV 0x80
-// Accessor functions
-#define GET_IPL(var) \
- GET_FARVAR(IPL_SEG, ((struct ipl_s *)0)->var)
-#define SET_IPL(var, val) \
- SET_FARVAR(IPL_SEG, ((struct ipl_s *)0)->var, (val))
-
/****************************************************************
- * Registers saved/restored in romlayout.S
+ * Extended Bios Data Area (EBDA)
****************************************************************/
-#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; }; }
-
-// Layout of registers passed in to irq handlers. Note that this
-// layout corresponds to code in romlayout.S - don't change it here
-// without also updating the assembler code.
-struct bregs {
- u16 ds;
- u16 es;
- UREG(edi, di, di_hi, di_lo);
- UREG(esi, si, si_hi, si_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;
- u16 flags;
+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;
+
+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;
-// bregs flags bitdefs
-#define F_ZF (1<<6)
-#define F_CF (1<<0)
+#define EBDA_SIZE DIV_ROUND_UP(sizeof(struct extended_bios_data_area_s), 1024)
+#define BASE_MEM_IN_K (640 - EBDA_SIZE)
-static inline void
-set_cf(struct bregs *regs, int cond)
-{
- if (cond)
- regs->flags |= F_CF;
- else
- regs->flags &= ~F_CF;
-}
+// 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))
/****************************************************************
extern struct bios_config_table_s BIOS_CONFIG_TABLE;
-
-/****************************************************************
- * Memory layout info
- ****************************************************************/
-
-#define SEG_BIOS 0xf000
-
-#define EBDA_SEG 0x9FC0
-#define IPL_SEG 0x9FF0
-#define EBDA_SIZE 1 // In KiB
-#define BASE_MEM_IN_K (640 - EBDA_SIZE)
-
#endif // __BIOSVAR_H
projects / seabios.git / blobdiff