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#*****************************************************************************
# ipi.S
#-----------------------------------------------------------------------------
#
# Test interprocessor interrupts.
#
#include "riscv_test.h"
#include "test_macros.h"
RVTEST_RV64S
RVTEST_CODE_BEGIN
# clear pending IPIs then enable interrupts
la a0, handler
csrw evec, a0
csrw clear_ipi, x0
csrr a0, status
li a1, SR_EI | (1 << (IRQ_IPI + SR_IM_SHIFT))
or a0, a0, a1
csrw status, a0
# wait for all cores to boot
la a0, coreid
li a1, 1
amoadd.w x0, a1, 0(a0)
lw a3, 4(x0)
1: lw a1, 0(a0)
blt a1, a3, 1b
# IPI dominoes
csrr a0, hartid
1: bnez a0, 1b
add a0, a0, 1
rem a0, a0, a3
csrw send_ipi, a0
1: b 1b
handler:
csrr a0, hartid
bnez a0, 2f
RVTEST_PASS
TEST_PASSFAIL
2: add a0, a0, 1
rem a0, a0, a3
csrw send_ipi, a0
1: b 1b
RVTEST_CODE_END
.data
RVTEST_DATA_BEGIN
TEST_DATA
coreid: .word 0
foo: .word 0
RVTEST_DATA_END
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