sys_mips.s

abstract rtos

#define _ASMLANGUAGE

#define zero    $0      
#define AT      $1      
#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 jp      $25     
#define k0      $26     
#define k1      $27
#define gp      $28     
#define sp      $29     
#define fp      $30     
#define s8	$30	
#define ra      $31     

#define	LEAF(symbol)                                    \
            .globl  symbol;                         \
            .align  2;                              \
            .type   symbol,@function;               \
            .ent    symbol,0;                       \
    symbol:     .frame  sp,0,ra

#define	END(function)                                   \
            .end    function;               \
            .size   function,.-function

#define THREAD_REG16    0
#define THREAD_REG17    4 
#define THREAD_REG18    8
#define THREAD_REG19    12
#define THREAD_REG20    16
#define THREAD_REG21    20
#define THREAD_REG22    24
#define THREAD_REG23    28
#define THREAD_REG24    32
#define THREAD_REG25    36
#define THREAD_REG26    40
#define THREAD_REG27    44
#define THREAD_REG28    48
#define THREAD_REG29    52
#define THREAD_REG30    56
#define THREAD_REG31    60
#define THREAD_STATUS   64


#define CP0_INDEX $0
#define CP0_RANDOM $1
#define CP0_ENTRYLO0 $2
#define CP0_ENTRYLO1 $3
#define CP0_CONF $3
#define CP0_CONTEXT $4
#define CP0_PAGEMASK $5
#define CP0_WIRED $6
#define CP0_INFO $7
#define CP0_BADVADDR $8
#define CP0_COUNT $9
#define CP0_ENTRYHI $10
#define CP0_COMPARE $11
#define CP0_STATUS $12
#define CP0_CAUSE $13
#define CP0_EPC $14
#define CP0_PRID $15
#define CP0_CONFIG $16
#define CP0_LLADDR $17
#define CP0_WATCHLO $18
#define CP0_WATCHHI $19
#define CP0_XCONTEXT $20
#define CP0_FRAMEMASK $21
#define CP0_DIAGNOSTIC $22
#define CP0_DEBUG $23
#define CP0_DEPC $24
#define CP0_PERFORMANCE $25
#define CP0_ECC $26
#define CP0_CACHEERR $27
#define CP0_TAGLO $28
#define CP0_TAGHI $29
#define CP0_ERROREPC $30
#define CP0_DESAVE $31


        
	.set	noreorder
	.align	5
	LEAF(sys_get_cur_fp)
	move	v0,fp
	jr ra
	END(sys_get_cur_fp)

	.set	noreorder
	.align	5
	LEAF(sys_get_cur_sp)
	move	v0,sp
	jr ra
	END(sys_get_cur_sp)

	.set	noreorder
	.align	5
	LEAF(sys_get_cur_pc)
	move	v0,ra
	jr ra
	END(sys_get_cur_pc)