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/*[
c_bsic.h
Basic Protected Mode Support and Flag Support.
----------------------------------------------
LOCAL CHAR SccsID[]="@(#)c_bsic.h 1.5 09/01/94";
]*/
/*
Define descriptor 'super' types.
*/
#define INVALID 0x00
#define AVAILABLE_TSS 0x01
#define LDT_SEGMENT 0x02
#define BUSY_TSS 0x03
#define CALL_GATE 0x04
#define TASK_GATE 0x05
#define INTERRUPT_GATE 0x06
#define TRAP_GATE 0x07
#define XTND_AVAILABLE_TSS 0x09
#define XTND_BUSY_TSS 0x0b
#define XTND_CALL_GATE 0x0c
#define XTND_INTERRUPT_GATE 0x0e
#define XTND_TRAP_GATE 0x0f
#define EXPANDUP_READONLY_DATA 0x11
#define EXPANDUP_WRITEABLE_DATA 0x13
#define EXPANDDOWN_READONLY_DATA 0x15
#define EXPANDDOWN_WRITEABLE_DATA 0x17
#define NONCONFORM_NOREAD_CODE 0x19
#define NONCONFORM_READABLE_CODE 0x1b
#define CONFORM_NOREAD_CODE 0x1d
#define CONFORM_READABLE_CODE 0x1f
/*
Macros for access to SELECTOR bit fields.
15 3 2 1 0
=================================
SELECTOR | INDEX |T|RPL|
| |I| |
=================================
*/
#define GET_SELECTOR_INDEX_TIMES8(x) ((x) & 0xfff8)
#define GET_SELECTOR_INDEX(x) (((x) & 0xfff8) >> 3)
#define GET_SELECTOR_TI(x) (((x) & 0x0004) >> 2)
#define GET_SELECTOR_RPL(x) ((x) & 0x3)
#define SET_SELECTOR_RPL(x,y) (x = ((x) & ~0x3) | y)
/*
Macros for access to ACCESS RIGHTS bit fields.
1 1 1 1 1 1
5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
=================================
ACCESS RIGHTS |-|X|-|-|-|-|-|-|P|DPL| SUPER |
=================================
Code Segment: Data Segment:
7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
================= =================
|P|DPL|1|1|C|R|A| |P|DPL|1|0|E|W|A|
================= =================
*/
#define GET_AR_P(x) (((x) & BIT7_MASK) != 0) /* present */
#define GET_AR_E(x) (((x) & BIT2_MASK) != 0) /* expand down */
#define GET_AR_C(x) (((x) & BIT2_MASK) != 0) /* conforming */
#define GET_AR_W(x) (((x) & BIT1_MASK) != 0) /* writeable */
#define GET_AR_R(x) (((x) & BIT1_MASK) != 0) /* readable */
#define GET_AR_X(x) (((x) & BIT14_MASK) != 0) /* big/default */
#define GET_AR_DPL(x) (((x) & 0x60) >> 5)
#define GET_AR_SUPER(x) ((x) & 0x1f)
#define NOT_PRESENT 0
#define PRESENT 1
#define ACCESSED 1
IMPORT ISM32 descriptor_super_type
IPT1(
IU16, AR
);
IMPORT VOID do_multiple_shiftrot_of
IPT1(
ISM32, new_of
);
IMPORT IU32 getFLAGS IPT0();
IMPORT VOID read_descriptor_linear
IPT2(
IU32, addr,
CPU_DESCR *, descr
);
IMPORT BOOL selector_is_null
IPT1(
IU16, selector
);
IMPORT BOOL selector_outside_GDT
IPT2(
IU16, selector,
IU32 *, descr_addr
);
IMPORT BOOL selector_outside_GDT_LDT
IPT2(
IU16, selector,
IU32 *, descr_addr
);
IMPORT VOID setFLAGS
IPT1(
IU32, flags
);
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