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| author | Paolo Bonzini <pbonzini@redhat.com> | 2015-05-20 16:03:33 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2015-05-21 11:44:57 +0200 |
| commit | edba90fb16ec7224da591ab8f83efe3673853a3f (patch) | |
| tree | 61b37be2e6e96a2163878e2df98e1f638ce5590e /include/bios.h | |
| parent | d092feedb023a3d631a1cd549dd1d5c18d852ac7 (diff) | |
| download | qboot-edba90fb16ec7224da591ab8f83efe3673853a3f.zip qboot-edba90fb16ec7224da591ab8f83efe3673853a3f.tar.gz qboot-edba90fb16ec7224da591ab8f83efe3673853a3f.tar.bz2 | |
first commit
Based on x86/bios from lkvm
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'include/bios.h')
| -rw-r--r-- | include/bios.h | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/include/bios.h b/include/bios.h new file mode 100644 index 0000000..153c887 --- /dev/null +++ b/include/bios.h @@ -0,0 +1,64 @@ +#ifndef BIOS_H_ +#define BIOS_H_ + +#include <inttypes.h> + +/* + * X86-32 Memory Map (typical) + * start end + * Real Mode Interrupt Vector Table 0x00000000 0x000003FF + * BDA area 0x00000400 0x000004FF + * Conventional Low Memory 0x00000500 0x0009FBFF + * EBDA area 0x0009FC00 0x0009FFFF + * VIDEO RAM 0x000A0000 0x000BFFFF + * VIDEO ROM (BIOS) 0x000C0000 0x000C7FFF + * ROMs & unus. space (mapped hw & misc)0x000C8000 0x000EFFFF 160 KiB (typically) + * Motherboard BIOS 0x000F0000 0x000FFFFF + * Extended Memory 0x00100000 0xFEBFFFFF + * Reserved (configs, ACPI, PnP, etc) 0xFEC00000 0xFFFFFFFF + */ + +#define REAL_MODE_IVT_BEGIN 0x00000000 +#define REAL_MODE_IVT_END 0x000003ff + +#define BDA_START 0x00000400 +#define BDA_END 0x000004ff + +#define EBDA_START 0x0009fc00 +#define EBDA_END 0x0009ffff + +#define E820_MAP_START EBDA_START + +/* + * When interfacing with assembler code we need to be sure how + * arguments are passed in real mode. + */ +#define bioscall __attribute__((regparm(3))) + +#ifndef __ASSEMBLER__ + +#include <linux/types.h> + +struct biosregs { + uint32_t eax; + uint32_t ebx; + uint32_t ecx; + uint32_t edx; + uint32_t esp; + uint32_t ebp; + uint32_t esi; + uint32_t edi; + uint32_t ds; + uint32_t es; + uint32_t fs; + uint32_t eip; + uint32_t eflags; +}; + +extern bioscall void int10_handler(struct biosregs *regs); +extern bioscall void int15_handler(struct biosregs *regs); +extern bioscall void e820_query_map(struct biosregs *regs); + +#endif + +#endif /* BIOS_H_ */ |