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Annotation of qemu/roms/ipxe/src/arch/i386/include/comboot.h, revision 1.1

1.1     ! root        1: #ifndef COMBOOT_H
        !             2: #define COMBOOT_H
        !             3: 
        !             4: /**
        !             5:  * @file
        !             6:  *
        !             7:  * SYSLINUX COMBOOT
        !             8:  */
        !             9: 
        !            10: FILE_LICENCE ( GPL2_OR_LATER );
        !            11: 
        !            12: #include <stdint.h>
        !            13: #include <setjmp.h>
        !            14: #include <ipxe/in.h>
        !            15: 
        !            16: /** Descriptor in a 32-bit IDT */
        !            17: struct idt_descriptor {
        !            18:        uint16_t offset_low;
        !            19:        uint16_t selector;
        !            20:        uint16_t flags;
        !            21:        uint16_t offset_high;
        !            22: } __attribute__ (( packed ));
        !            23: 
        !            24: /** Operand for the LIDT instruction */
        !            25: struct idt_register {
        !            26:        uint16_t limit;
        !            27:        uint32_t base;
        !            28: } __attribute__ (( packed ));
        !            29: 
        !            30: /** Entry in the interrupt jump buffer */
        !            31: struct ijb_entry {
        !            32:        uint8_t pusha_instruction;
        !            33:        uint8_t mov_instruction;
        !            34:        uint8_t mov_value;
        !            35:        uint8_t jump_instruction;
        !            36:        uint32_t jump_destination;
        !            37: } __attribute__ (( packed ));
        !            38: 
        !            39: /** The x86 opcode for "pushal" */
        !            40: #define IJB_PUSHA 0x60
        !            41: 
        !            42: /** The x86 opcode for "movb $imm8,%al" */
        !            43: #define IJB_MOV_AL_IMM8 0xB0
        !            44: 
        !            45: /** The x86 opcode for "jmp rel32" */
        !            46: #define IJB_JMP_REL32 0xE9
        !            47: 
        !            48: /** Flags that specify a 32-bit interrupt gate with DPL=0 */
        !            49: #define IDT_INTERRUPT_GATE_FLAGS 0x8E00
        !            50: 
        !            51: /** Address of COM32 interrupt descriptor table */
        !            52: #define COM32_IDT 0x100000
        !            53: 
        !            54: /** Number of entries in a fully populated IDT */
        !            55: #define COM32_NUM_IDT_ENTRIES 256
        !            56: 
        !            57: /** Address of COM32 interrupt jump buffer */
        !            58: #define COM32_IJB 0x100800
        !            59: 
        !            60: /** Segment used for COMBOOT PSP and image */
        !            61: #define COMBOOT_PSP_SEG 0x07C0
        !            62: 
        !            63: /** Entry point address of COM32 images */
        !            64: #define COM32_START_PHYS 0x101000
        !            65: 
        !            66: /** COM32 bounce buffer segment */
        !            67: #define COM32_BOUNCE_SEG 0x07C0
        !            68: 
        !            69: /** Size of SYSLINUX file block in bytes */
        !            70: #define COMBOOT_FILE_BLOCKSZ 512
        !            71: 
        !            72: /** COMBOOT feature flags (INT 22h AX=15h) */
        !            73: #define COMBOOT_FEATURE_LOCAL_BOOT (1 << 0)
        !            74: #define COMBOOT_FEATURE_IDLE_LOOP  (1 << 1)
        !            75: 
        !            76: /** Maximum number of shuffle descriptors for 
        !            77:  * shuffle and boot functions
        !            78:  * (INT 22h AX=0012h, 001Ah, 001Bh)
        !            79:  */
        !            80: #define COMBOOT_MAX_SHUFFLE_DESCRIPTORS 682
        !            81: 
        !            82: typedef union {
        !            83:        uint32_t l;
        !            84:        uint16_t w[2];
        !            85:        uint8_t  b[4];
        !            86: } com32_reg32_t;
        !            87: 
        !            88: typedef struct {
        !            89:        uint16_t gs;                /* Offset  0 */
        !            90:        uint16_t fs;                /* Offset  2 */
        !            91:        uint16_t es;                /* Offset  4 */
        !            92:        uint16_t ds;                /* Offset  6 */
        !            93: 
        !            94:        com32_reg32_t edi;          /* Offset  8 */
        !            95:        com32_reg32_t esi;          /* Offset 12 */
        !            96:        com32_reg32_t ebp;          /* Offset 16 */
        !            97:        com32_reg32_t _unused_esp;  /* Offset 20 */
        !            98:        com32_reg32_t ebx;          /* Offset 24 */
        !            99:        com32_reg32_t edx;          /* Offset 28 */
        !           100:        com32_reg32_t ecx;          /* Offset 32 */
        !           101:        com32_reg32_t eax;          /* Offset 36 */
        !           102: 
        !           103:        com32_reg32_t eflags;       /* Offset 40 */
        !           104: } com32sys_t;
        !           105: 
        !           106: typedef struct {
        !           107:        uint32_t eax;               /* Offset  0 */
        !           108:        uint32_t ecx;               /* Offset  4 */
        !           109:        uint32_t edx;               /* Offset  8 */
        !           110:        uint32_t ebx;               /* Offset 12 */
        !           111:        uint32_t esp;               /* Offset 16 */
        !           112:        uint32_t ebp;               /* Offset 20 */
        !           113:        uint32_t esi;               /* Offset 24 */
        !           114:        uint32_t edi;               /* Offset 28 */
        !           115: 
        !           116:        uint32_t eip;               /* Offset 32 */
        !           117: } syslinux_pm_regs;
        !           118: 
        !           119: typedef struct {
        !           120:        uint16_t es;                /* Offset  0 */
        !           121:        uint16_t _unused_cs;        /* Offset  2 */
        !           122:        uint16_t ds;                /* Offset  4 */
        !           123:        uint16_t ss;                /* Offset  6 */
        !           124:        uint16_t fs;                /* Offset  8 */
        !           125:        uint16_t gs;                /* Offset 10 */
        !           126: 
        !           127:        uint32_t eax;                /* Offset 12 */
        !           128:        uint32_t ecx;                /* Offset 16 */
        !           129:        uint32_t edx;                /* Offset 20 */
        !           130:        uint32_t ebx;                /* Offset 24 */
        !           131:        uint32_t esp;                /* Offset 28 */
        !           132:        uint32_t ebp;                /* Offset 32 */
        !           133:        uint32_t esi;                /* Offset 36 */
        !           134:        uint32_t edi;                /* Offset 40 */
        !           135: 
        !           136:        uint16_t ip;                /* Offset 44 */
        !           137:        uint16_t cs;                /* Offset 46 */
        !           138: } syslinux_rm_regs;
        !           139: 
        !           140: typedef struct {
        !           141:        uint32_t dest;
        !           142:        uint32_t src;
        !           143:        uint32_t len;
        !           144: } comboot_shuffle_descriptor;
        !           145: 
        !           146: extern void hook_comboot_interrupts ( );
        !           147: extern void unhook_comboot_interrupts ( );
        !           148: 
        !           149: /* These are not the correct prototypes, but it doens't matter, 
        !           150:  * as we only ever get the address of these functions;
        !           151:  * they are only called from COM32 code running in PHYS_CODE
        !           152:  */
        !           153: extern void com32_intcall_wrapper ( );
        !           154: extern void com32_farcall_wrapper ( );
        !           155: extern void com32_cfarcall_wrapper ( );
        !           156: extern void com32_irq_wrapper ( );
        !           157: 
        !           158: /* Resolve a hostname to an (IPv4) address */
        !           159: extern int comboot_resolv ( const char *name, struct in_addr *address );
        !           160: 
        !           161: /* setjmp/longjmp context buffer used to return after loading an image */
        !           162: extern rmjmp_buf comboot_return;
        !           163: 
        !           164: extern void *com32_external_esp;
        !           165: 
        !           166: #define COMBOOT_EXIT 1
        !           167: #define COMBOOT_EXIT_RUN_KERNEL 2
        !           168: #define COMBOOT_EXIT_COMMAND 3
        !           169: 
        !           170: extern void comboot_force_text_mode ( void );
        !           171: 
        !           172: #define COMBOOT_VIDEO_GRAPHICS    0x01
        !           173: #define COMBOOT_VIDEO_NONSTANDARD 0x02
        !           174: #define COMBOOT_VIDEO_VESA        0x04
        !           175: #define COMBOOT_VIDEO_NOTEXT      0x08
        !           176: 
        !           177: #endif

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