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* OpenSPARC T2 Processor File: n2_err_l2_LDSC_cecc_trap.s
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* ========== Copyright Header End ============================================
#define H_HT0_Hw_Corrected_Error_0x63 My_hw_corrected_error_handler
#define MAIN_PAGE_HV_ALSO
/* Set up L2$ in direct map and enable errors */
/* Need to go to direct-map mode in order to guarantee the
* L2$ diagnostic address of the line we will corrupt */
#define CREGS_L2_CTL_REG_DIS 0
#define CREGS_L2_CTL_REG_ASSOCDIS 1
#define CREGS_L2_ERR_EN_REG_CEEN 1
#define CREGS_L2_ERR_EN_REG_NCEEN 1
#define L2_ENTRY_PA 0xa000000000
#define TEST_DATA1 0x5555555555555555
#define TEST_PA 0x003000aa00
/* bits [21:18] select way in direct-map mode */
/* bits [17:9] select the set == 0x55,
so start L2_SCRUB at 0x50 */
#define MASK_PA_21_3 0x3ffff8
#define L2_ES_W1C_VALUE 0xc03ffff800000000
#define SPARC_ES_W1C_VALUE 0xefffffff
! Boot code does not provide TLB translation for IO address space
ldxa [%g0] ASI_LSU_CONTROL, %l0
stxa %l0, [%g0] ASI_LSU_CONTROL
setx L2_ES_W1C_VALUE, %l0, %l1
/* Bring the line into L2$ */
setx TEST_DATA1, %l0, %g5
/* Because membar only waits for L2$ to enque the request,
and it may take much longer for MCU to return data,
we need to stall by doing a load */
setx MASK_PA_21_3, %l0, %l2 ! Mask for extracting [21:3]
setx L2_ENTRY_PA, %l0, %g4
and %g2, %l2, %g5 !g2 has L2 PA,
or %g5, %g4, %g5 !g5 now has Diagnostic Data Array address
! Flip one bit to inject error
setup_read_loop: ! Set up a loop to cause L2$ fills
add %g2, 64*8, %g3 ! Pick the next index in same L2$ bank
setx 4*1024*1024, %l0, %l1 ! Offset to next L2$ alias (4MB)
mov 20, %l7 ! Maximum outer loop iterations
mov 50, %l6 ! Maximum inner loop iterations
brnz %l6, inner_read_loop
decrement_outer_loop_counter:
brnz %l7, outer_read_loop
outer_loop_ended_without_LDSC:
.global My_hw_corrected_error_handler
My_hw_corrected_error_handler:
ldxa [%g0]ASI_DESR, %o2 ! Also clears desr
add %o1, DESR_HCE_L2C, %o1
setx mpeval((1<<L2ES_LDSC)+(1<<L2ES_VEC)), %o0, %o1
setx (TEST_PA & MASK_PA_21_3), %o0, %o1
/*******************************************************
*******************************************************/