93 lines
1.9 KiB
C
93 lines
1.9 KiB
C
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#ifndef BIOS_H_
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#define BIOS_H_
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#include <inttypes.h>
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#include <stddef.h>
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#include <stdbool.h>
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/*
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* When interfacing with assembler code we need to be sure how
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* arguments are passed in real mode.
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*/
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#define bioscall __attribute__((regparm(3)))
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#ifndef __ASSEMBLER__
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struct biosregs {
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uint32_t eax;
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uint32_t ebx;
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uint32_t ecx;
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uint32_t edx;
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uint32_t esp;
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uint32_t ebp;
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uint32_t esi;
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uint32_t edi;
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uint32_t ds;
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uint32_t es;
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uint32_t fs;
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uint16_t ip;
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uint16_t cs;
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uint16_t eflags;
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} __attribute__((packed));
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/*
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* BIOS32 is called via a far call, so eflags is pushed by our
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* entry point and lies below CS:EIP. We do not include CS:EIP
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* at all in this struct.
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*/
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struct bios32regs {
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uint32_t eax;
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uint32_t ebx;
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uint32_t ecx;
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uint32_t edx;
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uint32_t esp;
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uint32_t ebp;
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uint32_t esi;
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uint32_t edi;
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uint32_t ds;
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uint32_t es;
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uint32_t fs;
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uint32_t eflags;
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} __attribute__((packed));
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extern bioscall void int10_handler(struct biosregs *regs);
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extern bioscall void int15_handler(struct biosregs *regs);
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extern bioscall void e820_query_map(struct biosregs *regs);
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extern bioscall void pcibios_handler(struct bios32regs *regs);
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extern void bios_intfake(void);
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extern void bios_irq(void);
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extern void bios_int10(void);
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extern void bios_int15(void);
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extern void bios32_entry(void);
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extern uint32_t pic_base(void);
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extern void setup_pci(void);
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extern bool setup_hw(void);
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extern bool setup_mmconfig(void);
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extern void setup_mptable(void);
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extern void extract_acpi(void);
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extern void boot_from_fwcfg(void);
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extern uint8_t max_bus;
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extern uint16_t e820_seg;
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extern uint32_t lowmem;
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extern uint8_t stext;
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extern uint8_t edata;
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extern uint8_t sinit;
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extern uint8_t einit;
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#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
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static inline void __attribute__((noreturn)) panic(void)
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{
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asm volatile("cli; hlt");
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for(;;);
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}
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#endif
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#endif /* BIOS_H_ */
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