MIPS Registers. More...

Files
file	regs.h
	Standard MIPS register names.

Macros
#define	PHYS_TO_K1(a) ((unsigned)(a) \| K1BASE)

Standard MIPS register names:
#define	zero $0

#define	z0 $0

#define	v0 $2

#define	v1 $3

#define	a0 $4

#define	a1 $5

#define	a2 $6

#define	a3 $7

#define	t0 $8

#define	t1 $9

#define	t2 $10

#define	t3 $11

#define	t4 $12

#define	t5 $13

#define	t6 $14

#define	t7 $15

#define	s0 $16

#define	s1 $17

#define	s2 $18

#define	s3 $19

#define	s4 $20

#define	s5 $21

#define	s6 $22

#define	s7 $23

#define	t8 $24

#define	t9 $25

#define	k0 $26
	kernel private register 0 *‍/

#define	k1 $27
	kernel private register 1 *‍/

#define	gp $28
	global data pointer *‍/

#define	sp $29
	stack-pointer *‍/

#define	fp $30
	frame-pointer *‍/

#define	ra $31
	return address *‍/

#define	pc $pc
	pc, used on mips16 *‍/

#define	fp0 $f0

#define	fp1 $f1

Useful memory constants:
#define	K0BASE 0x80000000

#define	K1BASE 0xA0000000

Standard Co-Processor 0 register numbers:
#define	C0_COUNT $9
	Count Register *‍/.

#define	C0_SR $12
	Status Register *‍/.

#define	C0_CAUSE $13
	last exception description *‍/

#define	C0_EPC $14
	Exception error address *‍/.

#define	C0_CONFIG $16
	CPU configuration *‍/.

Standard Status Register bitmasks:
#define	SR_CU1 0x20000000
	Mark CP1 as usable *‍/.

#define	SR_FR 0x04000000
	Enable MIPS III FP registers *‍/.

#define	SR_BEV 0x00400000
	Controls location of exception vectors *‍/.

#define	SR_PE 0x00100000
	Mark soft reset (clear parity error) *‍/.

#define	SR_KX 0x00000080
	Kernel extended addressing enabled *‍/.

#define	SR_SX 0x00000040
	Supervisor extended addressing enabled *‍/.

#define	SR_UX 0x00000020
	User extended addressing enabled *‍/.

Standard (R4000) cache operations.
Taken from "MIPS R4000 Microprocessor User's Manual" 2nd edition:
#define	CACHE_I (0)
	primary instruction *‍/

#define	CACHE_D (1)
	primary data *‍/

#define	CACHE_SI (2)
	secondary instruction *‍/

#define	CACHE_SD (3)
	secondary data (or combined instruction/data) *‍/

#define	INDEX_INVALIDATE (0)
	also encodes WRITEBACK if CACHE_D or CACHE_SD *‍/

#define	INDEX_LOAD_TAG (1)

#define	INDEX_STORE_TAG (2)

#define	CREATE_DIRTY_EXCLUSIVE (3)
	CACHE_D and CACHE_SD only *‍/.

#define	HIT_INVALIDATE (4)

#define	CACHE_FILL (5)
	CACHE_I only *‍/.

#define	HIT_WRITEBACK_INVALIDATE (5)
	CACHE_D and CACHE_SD only *‍/.

#define	HIT_WRITEBACK (6)
	CACHE_I, CACHE_D and CACHE_SD only *‍/.

#define	HIT_SET_VIRTUAL (7)
	CACHE_SI and CACHE_SD only *‍/.

#define	BUILD_CACHE_OP(o, c) (((o) << 2) \| (c))

Individual cache operations:
#define	INDEX_INVALIDATE_I BUILD_CACHE_OP(INDEX_INVALIDATE,CACHE_I)

#define	INDEX_WRITEBACK_INVALIDATE_D BUILD_CACHE_OP(INDEX_INVALIDATE,CACHE_D)

#define	INDEX_INVALIDATE_SI BUILD_CACHE_OP(INDEX_INVALIDATE,CACHE_SI)

#define	INDEX_WRITEBACK_INVALIDATE_SD BUILD_CACHE_OP(INDEX_INVALIDATE,CACHE_SD)

#define	INDEX_LOAD_TAG_I BUILD_CACHE_OP(INDEX_LOAD_TAG,CACHE_I)

#define	INDEX_LOAD_TAG_D BUILD_CACHE_OP(INDEX_LOAD_TAG,CACHE_D)

#define	INDEX_LOAD_TAG_SI BUILD_CACHE_OP(INDEX_LOAD_TAG,CACHE_SI)

#define	INDEX_LOAD_TAG_SD BUILD_CACHE_OP(INDEX_LOAD_TAG,CACHE_SD)

#define	INDEX_STORE_TAG_I BUILD_CACHE_OP(INDEX_STORE_TAG,CACHE_I)

#define	INDEX_STORE_TAG_D BUILD_CACHE_OP(INDEX_STORE_TAG,CACHE_D)

#define	INDEX_STORE_TAG_SI BUILD_CACHE_OP(INDEX_STORE_TAG,CACHE_SI)

#define	INDEX_STORE_TAG_SD BUILD_CACHE_OP(INDEX_STORE_TAG,CACHE_SD)

#define	CREATE_DIRTY_EXCLUSIVE_D BUILD_CACHE_OP(CREATE_DIRTY_EXCLUSIVE,CACHE_D)

#define	CREATE_DIRTY_EXCLUSIVE_SD BUILD_CACHE_OP(CREATE_DIRTY_EXCLUSIVE,CACHE_SD)

#define	HIT_INVALIDATE_I BUILD_CACHE_OP(HIT_INVALIDATE,CACHE_I)

#define	HIT_INVALIDATE_D BUILD_CACHE_OP(HIT_INVALIDATE,CACHE_D)

#define	HIT_INVALIDATE_SI BUILD_CACHE_OP(HIT_INVALIDATE,CACHE_SI)

#define	HIT_INVALIDATE_SD BUILD_CACHE_OP(HIT_INVALIDATE,CACHE_SD)

#define	CACHE_FILL_I BUILD_CACHE_OP(CACHE_FILL,CACHE_I)

#define	HIT_WRITEBACK_INVALIDATE_D BUILD_CACHE_OP(HIT_WRITEBACK_INVALIDATE,CACHE_D)

#define	HIT_WRITEBACK_INVALIDATE_SD BUILD_CACHE_OP(HIT_WRITEBACK_INVALIDATE,CACHE_SD)

#define	HIT_WRITEBACK_I BUILD_CACHE_OP(HIT_WRITEBACK,CACHE_I)

#define	HIT_WRITEBACK_D BUILD_CACHE_OP(HIT_WRITEBACK,CACHE_D)

#define	HIT_WRITEBACK_SD BUILD_CACHE_OP(HIT_WRITEBACK,CACHE_SD)

#define	HIT_SET_VIRTUAL_SI BUILD_CACHE_OP(HIT_SET_VIRTUAL,CACHE_SI)

#define	HIT_SET_VIRTUAL_SD BUILD_CACHE_OP(HIT_SET_VIRTUAL,CACHE_SD)

Detailed Description

MIPS Registers.

Files

Macros

Standard MIPS register names:

Useful memory constants:

Standard Co-Processor 0 register numbers:

Standard Status Register bitmasks:

Standard (R4000) cache operations.

Individual cache operations:

Detailed Description