X-Git-Url: http://wien.tomnetworks.com/gitweb/?a=blobdiff_plain;f=src%2Fbiosvar.h;h=b6f7174c59dd7b3ffd739c1ff85f45cd172ce91c;hb=refs%2Fheads%2Fcoreboot;hp=7ea038ff2ce3cedb0ec60723f39f0e6db6508091;hpb=59c35f25b85357603dd28a974d38845577d9a091;p=seabios.git diff --git a/src/biosvar.h b/src/biosvar.h index 7ea038f..b6f7174 100644 --- a/src/biosvar.h +++ b/src/biosvar.h @@ -1,30 +1,42 @@ // Variable layouts of bios. // -// Copyright (C) 2008 Kevin O'Connor +// Copyright (C) 2008-2010 Kevin O'Connor // -// 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. #ifndef __BIOSVAR_H #define __BIOSVAR_H #include "types.h" // u8 #include "farptr.h" // GET_FARVAR #include "config.h" // CONFIG_* +#include "disk.h" // struct chs_s /**************************************************************** - * Bios Data Area (BDA) + * Interupt vector table ****************************************************************/ -struct ivec { - u16 offset; - u16 seg; +struct rmode_IVT { + struct segoff_s ivec[256]; }; +#define GET_IVT(vector) \ + GET_FARVAR(SEG_IVT, ((struct rmode_IVT *)0)->ivec[vector]) +#define SET_IVT(vector, segoff) \ + SET_FARVAR(SEG_IVT, ((struct rmode_IVT *)0)->ivec[vector], segoff) + +#define FUNC16(func) ({ \ + ASSERT32FLAT(); \ + extern void func (void); \ + SEGOFF(SEG_BIOS, (u32)func - BUILD_BIOS_ADDR); \ + }) + + +/**************************************************************** + * Bios Data Area (BDA) + ****************************************************************/ + struct bios_data_area_s { - // 00:00 - struct ivec ivecs[256]; - // 30:00 -// u8 stack[256]; // 40:00 u16 port_com[4]; u16 port_lpt[3]; @@ -60,7 +72,7 @@ struct bios_data_area_s { u16 crtc_address; u8 video_msr; u8 video_pal; - u32 jump_cs_ip; + struct segoff_s jump; u8 other_6b; u32 timer_counter; // 40:70 @@ -68,7 +80,7 @@ struct bios_data_area_s { u8 break_flag; u16 soft_reset_flag; u8 disk_last_status; - u8 disk_count; + u8 hdcount; u8 disk_control_byte; u8 port_disk; u8 lpt_timeout[4]; @@ -89,14 +101,20 @@ struct bios_data_area_s { u8 floppy_harddisk_info; // 40:90 u8 floppy_media_state[4]; - u8 floppy_track0; - u8 floppy_track1; - u8 kbd_mode; + u8 floppy_track[2]; + u8 kbd_flag2; u8 kbd_led; - u32 ptr_user_wait_complete_flag; + struct segoff_s user_wait_complete_flag; u32 user_wait_timeout; // 40:A0 u8 rtc_wait_flag; + u8 other_a1[7]; + struct segoff_s video_savetable; + u8 other_ac[4]; + // 40:B0 + u8 other_b0[9]; + u8 vbe_flag; + u16 vbe_mode; } PACKED; // BDA floppy_recalibration_status bitdefs @@ -128,15 +146,9 @@ struct bios_data_area_s { /**************************************************************** - * Hard drive info + * Extended Bios Data Area (EBDA) ****************************************************************/ -struct chs_s { - u16 heads; // # heads - u16 cylinders; // # cylinders - u16 spt; // # sectors / track -}; - // DPTE definition struct dpte_s { u16 iobase1; @@ -153,92 +165,21 @@ struct dpte_s { u8 checksum; }; -struct ata_channel_s { - u16 iobase1; // IO Base 1 - u16 iobase2; // IO Base 2 - u16 pci_bdf; - u8 irq; // IRQ -}; - -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 - - u8 translation; // type of translation - struct chs_s lchs; // Logical CHS - struct chs_s pchs; // Physical CHS - - 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; + struct drive_s *emulated_drive_gf; u32 ilba; u16 buffer_segment; u16 load_segment; u16 sector_count; + u8 active; + u8 media; + u8 emulated_extdrive; // Virtual device - struct chs_s vdevice; + struct chs_s lchs; }; - -/**************************************************************** - * Initial Program Load (IPL) - ****************************************************************/ - -struct ipl_entry_s { - u16 type; - u16 flags; - u32 vector; - u32 description; -}; - -struct ipl_s { - struct ipl_entry_s table[8]; - u16 count; - u16 sequence; - u32 bootorder; - u8 checkfloppysig; -}; - -#define IPL_TYPE_FLOPPY 0x01 -#define IPL_TYPE_HARDDISK 0x02 -#define IPL_TYPE_CDROM 0x03 -#define IPL_TYPE_BEV 0x80 - - -/**************************************************************** - * Extended Bios Data Area (EBDA) - ****************************************************************/ - struct fdpt_s { u16 cylinders; u8 heads; @@ -254,10 +195,21 @@ struct fdpt_s { u8 checksum; } PACKED; +struct usbkeyinfo { + union { + struct { + u8 modifiers; + u8 repeatcount; + u8 keys[6]; + }; + u64 data; + }; +}; + struct extended_bios_data_area_s { u8 size; u8 reserved1[0x21]; - u32 far_call_pointer; + struct segoff_s far_call_pointer; u8 mouse_flag1; u8 mouse_flag2; u8 mouse_data[0x08]; @@ -270,33 +222,102 @@ struct extended_bios_data_area_s { // 0x5d u8 other2[0xC4]; + // 0x121 - Begin custom storage. u8 ps2ctr; + struct usbkeyinfo usbkey_last; - // Physical memory available. - u32 ram_size; // Amount of continuous ram under 4Gig - u64 ram_size_over4G; // Amount of continuous ram >4Gig - u16 e820_count; - u32 e820_loc; - u32 pir_loc; - - // ATA Driver data - struct ata_s ata; + int RTCusers; // El Torito Emulation data struct cdemu_s cdemu; - // Initial program load - struct ipl_s ipl; + // Buffer for disk DPTE table + struct dpte_s dpte; + + // Locks for removable devices + u8 cdrom_locks[CONFIG_MAX_EXTDRIVE]; + + u16 boot_sequence; + + /* TSC emulation timekeepers */ + u64 tsc_8254; + int last_tsc_8254; + + // Stack space available for code that needs it. + u8 extra_stack[512] __aligned(8); } PACKED; -#define EBDA_SIZE DIV_ROUND_UP(sizeof(struct extended_bios_data_area_s), 1024) -#define BASE_MEM_IN_K (640 - EBDA_SIZE) +// The initial size and location of EBDA +#define EBDA_SIZE_START \ + DIV_ROUND_UP(sizeof(struct extended_bios_data_area_s), 1024) +#define EBDA_SEGMENT_START \ + FLATPTR_TO_SEG(BUILD_LOWRAM_END - EBDA_SIZE_START*1024) // 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)) +static inline u16 get_ebda_seg(void) { + return GET_BDA(ebda_seg); +} +static inline struct extended_bios_data_area_s * +get_ebda_ptr(void) +{ + ASSERT32FLAT(); + return MAKE_FLATPTR(get_ebda_seg(), 0); +} +#define GET_EBDA2(eseg, var) \ + GET_FARVAR(eseg, ((struct extended_bios_data_area_s *)0)->var) +#define SET_EBDA2(eseg, var, val) \ + SET_FARVAR(eseg, ((struct extended_bios_data_area_s *)0)->var, (val)) +#define GET_EBDA(var) \ + GET_EBDA2(get_ebda_seg(), var) +#define SET_EBDA(var, val) \ + SET_EBDA2(get_ebda_seg(), var, (val)) + +#define EBDA_OFFSET_TOP_STACK \ + offsetof(struct extended_bios_data_area_s, extra_stack[ \ + FIELD_SIZEOF(struct extended_bios_data_area_s \ + , extra_stack)]) + + +/**************************************************************** + * Global variables + ****************************************************************/ + +#if MODE16 == 0 && MODESEGMENT == 1 +// In 32bit segmented mode %cs may not be readable and the code may be +// relocated. The entry code sets up %gs with a readable segment and +// the code offset can be determined by get_global_offset(). +#define GLOBAL_SEGREG GS +static inline u32 __attribute_const get_global_offset(void) { + u32 ret; + asm(" calll 1f\n" + "1:popl %0\n" + " subl $1b, %0" + : "=r"(ret)); + return ret; +} +#else +#define GLOBAL_SEGREG CS +static inline u32 __attribute_const get_global_offset(void) { + return 0; +} +#endif +static inline u16 get_global_seg(void) { + return GET_SEG(GLOBAL_SEGREG); +} +#define GET_GLOBAL(var) \ + GET_VAR(GLOBAL_SEGREG, *(typeof(&(var)))((void*)&(var) \ + + get_global_offset())) +#define SET_GLOBAL(var, val) do { \ + ASSERT32FLAT(); \ + (var) = (val); \ + } while (0) +#if MODESEGMENT +#define GLOBALFLAT2GLOBAL(var) ((typeof(var))((void*)(var) - BUILD_BIOS_ADDR)) +#else +#define GLOBALFLAT2GLOBAL(var) (var) +#endif +// Access a "flat" pointer known to point to the f-segment. +#define GET_GLOBALFLAT(var) GET_GLOBAL(*GLOBALFLAT2GLOBAL(&(var))) /**************************************************************** @@ -311,6 +332,6 @@ struct bios_config_table_s { u8 feature1, feature2, feature3, feature4, feature5; } PACKED; -extern struct bios_config_table_s BIOS_CONFIG_TABLE; +extern struct bios_config_table_s BIOS_CONFIG_TABLE __aligned(1); #endif // __BIOSVAR_H