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author | 2015-08-28 09:58:54 +0800 | |
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committer | 2015-09-01 12:44:00 +0800 | |
commit | e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb (patch) | |
tree | 66b09f592c55df2878107a468a91d21506104d3f /qemu/roms/ipxe/src/arch/i386/include/librm.h | |
parent | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (diff) |
Add qemu 2.4.0
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>
Diffstat (limited to 'qemu/roms/ipxe/src/arch/i386/include/librm.h')
-rw-r--r-- | qemu/roms/ipxe/src/arch/i386/include/librm.h | 279 |
1 files changed, 279 insertions, 0 deletions
diff --git a/qemu/roms/ipxe/src/arch/i386/include/librm.h b/qemu/roms/ipxe/src/arch/i386/include/librm.h new file mode 100644 index 000000000..c8ba72b53 --- /dev/null +++ b/qemu/roms/ipxe/src/arch/i386/include/librm.h @@ -0,0 +1,279 @@ +#ifndef LIBRM_H +#define LIBRM_H + +FILE_LICENCE ( GPL2_OR_LATER ); + +/* Segment selectors as used in our protected-mode GDTs. + * + * Don't change these unless you really know what you're doing. + */ + +#define VIRTUAL_CS 0x08 +#define VIRTUAL_DS 0x10 +#define PHYSICAL_CS 0x18 +#define PHYSICAL_DS 0x20 +#define REAL_CS 0x28 +#define REAL_DS 0x30 +#if 0 +#define LONG_CS 0x38 +#define LONG_DS 0x40 +#endif + +#ifndef ASSEMBLY + +#ifdef UACCESS_LIBRM +#define UACCESS_PREFIX_librm +#else +#define UACCESS_PREFIX_librm __librm_ +#endif + +/* Variables in librm.S */ +extern unsigned long virt_offset; + +/** + * Convert physical address to user pointer + * + * @v phys_addr Physical address + * @ret userptr User pointer + */ +static inline __always_inline userptr_t +UACCESS_INLINE ( librm, phys_to_user ) ( unsigned long phys_addr ) { + return ( phys_addr - virt_offset ); +} + +/** + * Convert user buffer to physical address + * + * @v userptr User pointer + * @v offset Offset from user pointer + * @ret phys_addr Physical address + */ +static inline __always_inline unsigned long +UACCESS_INLINE ( librm, user_to_phys ) ( userptr_t userptr, off_t offset ) { + return ( userptr + offset + virt_offset ); +} + +static inline __always_inline userptr_t +UACCESS_INLINE ( librm, virt_to_user ) ( volatile const void *addr ) { + return trivial_virt_to_user ( addr ); +} + +static inline __always_inline void * +UACCESS_INLINE ( librm, user_to_virt ) ( userptr_t userptr, off_t offset ) { + return trivial_user_to_virt ( userptr, offset ); +} + +static inline __always_inline userptr_t +UACCESS_INLINE ( librm, userptr_add ) ( userptr_t userptr, off_t offset ) { + return trivial_userptr_add ( userptr, offset ); +} + +static inline __always_inline off_t +UACCESS_INLINE ( librm, userptr_sub ) ( userptr_t userptr, + userptr_t subtrahend ) { + return trivial_userptr_sub ( userptr, subtrahend ); +} + +static inline __always_inline void +UACCESS_INLINE ( librm, memcpy_user ) ( userptr_t dest, off_t dest_off, + userptr_t src, off_t src_off, + size_t len ) { + trivial_memcpy_user ( dest, dest_off, src, src_off, len ); +} + +static inline __always_inline void +UACCESS_INLINE ( librm, memmove_user ) ( userptr_t dest, off_t dest_off, + userptr_t src, off_t src_off, + size_t len ) { + trivial_memmove_user ( dest, dest_off, src, src_off, len ); +} + +static inline __always_inline int +UACCESS_INLINE ( librm, memcmp_user ) ( userptr_t first, off_t first_off, + userptr_t second, off_t second_off, + size_t len ) { + return trivial_memcmp_user ( first, first_off, second, second_off, len); +} + +static inline __always_inline void +UACCESS_INLINE ( librm, memset_user ) ( userptr_t buffer, off_t offset, + int c, size_t len ) { + trivial_memset_user ( buffer, offset, c, len ); +} + +static inline __always_inline size_t +UACCESS_INLINE ( librm, strlen_user ) ( userptr_t buffer, off_t offset ) { + return trivial_strlen_user ( buffer, offset ); +} + +static inline __always_inline off_t +UACCESS_INLINE ( librm, memchr_user ) ( userptr_t buffer, off_t offset, + int c, size_t len ) { + return trivial_memchr_user ( buffer, offset, c, len ); +} + + +/****************************************************************************** + * + * Access to variables in .data16 and .text16 + * + */ + +extern char *data16; +extern char *text16; + +#define __data16( variable ) \ + __attribute__ (( section ( ".data16" ) )) \ + _data16_ ## variable __asm__ ( #variable ) + +#define __data16_array( variable, array ) \ + __attribute__ (( section ( ".data16" ) )) \ + _data16_ ## variable array __asm__ ( #variable ) + +#define __bss16( variable ) \ + __attribute__ (( section ( ".bss16" ) )) \ + _data16_ ## variable __asm__ ( #variable ) + +#define __bss16_array( variable, array ) \ + __attribute__ (( section ( ".bss16" ) )) \ + _data16_ ## variable array __asm__ ( #variable ) + +#define __text16( variable ) \ + __attribute__ (( section ( ".text16.data" ) )) \ + _text16_ ## variable __asm__ ( #variable ) + +#define __text16_array( variable, array ) \ + __attribute__ (( section ( ".text16.data" ) )) \ + _text16_ ## variable array __asm__ ( #variable ) + +#define __use_data16( variable ) \ + ( * ( ( typeof ( _data16_ ## variable ) * ) \ + & ( data16 [ ( size_t ) & ( _data16_ ## variable ) ] ) ) ) + +#define __use_text16( variable ) \ + ( * ( ( typeof ( _text16_ ## variable ) * ) \ + & ( text16 [ ( size_t ) & ( _text16_ ## variable ) ] ) ) ) + +#define __from_data16( pointer ) \ + ( ( unsigned int ) \ + ( ( ( void * ) (pointer) ) - ( ( void * ) data16 ) ) ) + +#define __from_text16( pointer ) \ + ( ( unsigned int ) \ + ( ( ( void * ) (pointer) ) - ( ( void * ) text16 ) ) ) + +/* Variables in librm.S, present in the normal data segment */ +extern uint16_t rm_sp; +extern uint16_t rm_ss; +extern uint16_t __text16 ( rm_cs ); +#define rm_cs __use_text16 ( rm_cs ) +extern uint16_t __text16 ( rm_ds ); +#define rm_ds __use_text16 ( rm_ds ) + +/** + * Convert segment:offset address to user buffer + * + * @v segment Real-mode segment + * @v offset Real-mode offset + * @ret buffer User buffer + */ +static inline __always_inline userptr_t +real_to_user ( unsigned int segment, unsigned int offset ) { + return ( phys_to_user ( ( segment << 4 ) + offset ) ); +} + +extern uint16_t copy_user_to_rm_stack ( userptr_t data, size_t size ); +extern void remove_user_from_rm_stack ( userptr_t data, size_t size ); + +/* TEXT16_CODE: declare a fragment of code that resides in .text16 */ +#define TEXT16_CODE( asm_code_str ) \ + ".section \".text16\", \"ax\", @progbits\n\t" \ + ".code16\n\t" \ + asm_code_str "\n\t" \ + ".code32\n\t" \ + ".previous\n\t" + +/* REAL_CODE: declare a fragment of code that executes in real mode */ +#define REAL_CODE( asm_code_str ) \ + "pushl $1f\n\t" \ + "call real_call\n\t" \ + "addl $4, %%esp\n\t" \ + TEXT16_CODE ( "\n1:\n\t" \ + asm_code_str \ + "\n\t" \ + "ret\n\t" ) + +/* PHYS_CODE: declare a fragment of code that executes in flat physical mode */ +#define PHYS_CODE( asm_code_str ) \ + "call _virt_to_phys\n\t" \ + asm_code_str \ + "call _phys_to_virt\n\t" + +/** Number of interrupts */ +#define NUM_INT 256 + +/** An interrupt descriptor table register */ +struct idtr { + /** Limit */ + uint16_t limit; + /** Base */ + uint32_t base; +} __attribute__ (( packed )); + +/** An interrupt descriptor table entry */ +struct interrupt_descriptor { + /** Low 16 bits of address */ + uint16_t low; + /** Code segment */ + uint16_t segment; + /** Unused */ + uint8_t unused; + /** Type and attributes */ + uint8_t attr; + /** High 16 bits of address */ + uint16_t high; +} __attribute__ (( packed )); + +/** Interrupt descriptor is present */ +#define IDTE_PRESENT 0x80 + +/** Interrupt descriptor 32-bit interrupt gate type */ +#define IDTE_TYPE_IRQ32 0x0e + +/** An interrupt vector + * + * Each interrupt vector comprises an eight-byte fragment of code: + * + * 60 pushal + * b0 xx movb $INT, %al + * e9 xx xx xx xx jmp interrupt_wrapper + */ +struct interrupt_vector { + /** "pushal" instruction */ + uint8_t pushal; + /** "movb" instruction */ + uint8_t movb; + /** Interrupt number */ + uint8_t intr; + /** "jmp" instruction */ + uint8_t jmp; + /** Interrupt wrapper address offset */ + uint32_t offset; + /** Next instruction after jump */ + uint8_t next[0]; +} __attribute__ (( packed )); + +/** "pushal" instruction */ +#define PUSHAL_INSN 0x60 + +/** "movb" instruction */ +#define MOVB_INSN 0xb0 + +/** "jmp" instruction */ +#define JMP_INSN 0xe9 + +extern void set_interrupt_vector ( unsigned int intr, void *vector ); + +#endif /* ASSEMBLY */ + +#endif /* LIBRM_H */ |