362487c0ba
from VESA BIOS initialization. All other malloc(9) uses in the function is blocking any way.
157 lines
4.3 KiB
C
157 lines
4.3 KiB
C
/*-
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* Copyright (c) 2009 Alex Keda <admin@lissyara.su>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* x86 registers were borrowed from x86emu.h x86emu_regs.h
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* for compatability.
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*/
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#ifndef _X86BIOS_H_
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#define _X86BIOS_H_
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#include <sys/endian.h>
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#include <sys/systm.h>
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#include <sys/types.h>
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#ifdef __BIG_ENDIAN__
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struct x86_register32 {
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uint32_t e_reg;
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};
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struct x86_register16 {
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uint16_t filler0;
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uint16_t x_reg;
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};
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struct x86_register8 {
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uint8_t filler0;
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uint8_t filler1;
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uint8_t h_reg;
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uint8_t l_reg;
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};
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#else /* !__BIG_ENDIAN__ */
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struct x86_register32 {
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uint32_t e_reg;
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};
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struct x86_register16 {
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uint16_t x_reg;
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};
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struct x86_register8 {
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uint8_t l_reg;
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uint8_t h_reg;
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};
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#endif /* __BIG_ENDIAN__ */
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union x86_register {
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struct x86_register32 I32_reg;
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struct x86_register16 I16_reg;
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struct x86_register8 I8_reg;
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};
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struct x86regs {
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uint16_t _pad0; /* CS */
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uint16_t _pad1; /* DS */
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uint16_t register_es;
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uint16_t register_fs;
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uint16_t register_gs;
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uint16_t _pad2; /* SS */
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uint32_t register_flags;
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union x86_register register_a;
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union x86_register register_b;
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union x86_register register_c;
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union x86_register register_d;
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union x86_register _pad3; /* SP */
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union x86_register register_bp;
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union x86_register register_si;
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union x86_register register_di;
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};
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typedef struct x86regs x86regs_t;
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/* 8 bit registers */
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#define R_AH register_a.I8_reg.h_reg
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#define R_AL register_a.I8_reg.l_reg
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#define R_BH register_b.I8_reg.h_reg
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#define R_BL register_b.I8_reg.l_reg
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#define R_CH register_c.I8_reg.h_reg
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#define R_CL register_c.I8_reg.l_reg
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#define R_DH register_d.I8_reg.h_reg
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#define R_DL register_d.I8_reg.l_reg
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/* 16 bit registers */
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#define R_AX register_a.I16_reg.x_reg
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#define R_BX register_b.I16_reg.x_reg
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#define R_CX register_c.I16_reg.x_reg
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#define R_DX register_d.I16_reg.x_reg
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/* 32 bit extended registers */
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#define R_EAX register_a.I32_reg.e_reg
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#define R_EBX register_b.I32_reg.e_reg
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#define R_ECX register_c.I32_reg.e_reg
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#define R_EDX register_d.I32_reg.e_reg
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/* special registers */
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#define R_BP register_bp.I16_reg.x_reg
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#define R_SI register_si.I16_reg.x_reg
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#define R_DI register_di.I16_reg.x_reg
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#define R_FLG register_flags
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/* special registers */
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#define R_EBP register_bp.I32_reg.e_reg
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#define R_ESI register_si.I32_reg.e_reg
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#define R_EDI register_di.I32_reg.e_reg
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#define R_EFLG register_flags
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/* segment registers */
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#define R_ES register_es
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#define R_FS register_fs
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#define R_GS register_gs
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#define X86BIOS_PHYSTOSEG(x) (((x) >> 4) & 0xffff)
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#define X86BIOS_PHYSTOOFF(x) ((x) & 0x000f)
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__BEGIN_DECLS
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void *x86bios_alloc(uint32_t *offset, size_t size, int flags);
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void x86bios_call(struct x86regs *regs, uint16_t seg, uint16_t off);
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void x86bios_free(void *addr, size_t size);
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uint32_t x86bios_get_intr(int intno);
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void *x86bios_get_orm(uint32_t offset);
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void x86bios_init_regs(struct x86regs *regs);
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void x86bios_intr(struct x86regs *regs, int intno);
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int x86bios_match_device(uint32_t offset, device_t dev);
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void *x86bios_offset(uint32_t offset);
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__END_DECLS
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#endif /* !_X86BIOS_H_ */
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