compiler/ kernel/ lib/ scripts/ seed/ sublime/ test/ acceptance/ boot/ bootstrap/ cycles/ dispatch/ loader/ mmio/ modules/ native/ packages/ pages/ runtime/ scheduling/ shared/ slots/ smp/ sync/ build.rad 2.0 KiB machine.ras 3.1 KiB run 589 B termination/ tests/ trap/ run 2.7 KiB runner.rad 10.3 KiB vim/ .gitignore 336 B .gitsigners 112 B CONTRIBUTING 2.1 KiB LICENSE 1.1 KiB Makefile 10.2 KiB README 2.5 KiB STYLE 2.5 KiB std.lib 1.5 KiB std.lib.test 551 B
test/sync/machine.ras 3.1 KiB raw
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//! Exercise code publication and contended metadata updates on each hart.
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.constant EXPECTED HARTS * 100;
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.text;
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@entry
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    li %t0 0x1888;
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    csrw mstatus %t0;
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    csrr %s7 mstatus;
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    call @kernel::sync::maskInterrupts;
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    li %t0 8;
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    bne %a0 %t0 @fail;
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    csrr %t0 mstatus;
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    andi %t1 %s7 -9;
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    bne %t0 %t1 @fail;
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    call @kernel::sync::restoreInterrupts;
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    csrr %t0 mstatus;
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    bne %t0 %s7 @fail;
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    li %a0 0;
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    call @kernel::sync::restoreInterrupts;
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    csrr %t0 mstatus;
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    andi %t1 %s7 -9;
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    bne %t0 %t1 @fail;
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    call @kernel::sync::retired;
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    mv %s5 %a0;
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    call @kernel::sync::retired;
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    bgeu %s5 %a0 @fail;
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    csrr %s6 mhartid;
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    li %s0 0x40010000;
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    slli %s0 %s0 1;
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    bnez %s6 @waitCode;
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    li %t0 1;
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    slli %t0 %t0 32;
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    addi %t0 %t0 -4;
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    sw %t0 0(%s0);
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    sw %t0 4(%s0);
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    li %t0 0x02a00513;
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    sw %t0 64(%s0);
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    li %t0 0x00008067;
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    sw %t0 68(%s0);
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    li %t0 37;
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    sw %t0 44(%s0);
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    addi %a0 %s0 40;
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    li %a1 -1;
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    call @kernel::sync::storeRelease32;
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    addi %a0 %s0 24;
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    li %a1 1;
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    call @kernel::sync::storeRelease;
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@waitCode
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    addi %a0 %s0 24;
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    call @kernel::sync::loadAcquire;
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    beqz %a0 @waitCode;
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    addi %a0 %s0 40;
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    call @kernel::sync::loadAcquire32;
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    li %t0 1;
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    slli %t0 %t0 32;
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    addi %t0 %t0 -1;
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    bne %a0 %t0 @fail;
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    lwu %t0 44(%s0);
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    li %t1 37;
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    bne %t0 %t1 @fail;
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    call @kernel::sync::syncInstructions;
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    addi %t0 %s0 64;
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    jalr %ra %t0 0;
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    li %t0 42;
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    bne %a0 %t0 @fail;
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    li %s1 100;
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@ticket
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    mv %a0 %s0;
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    call @kernel::sync::nextTicket;
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    mv %s2 %a0;
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    li %t0 100;
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    bne %s1 %t0 @acquire;
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    // Every hart holds its first ticket before any hart can enter the lock.
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    addi %a0 %s0 72;
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    li %a1 1;
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    call @kernel::sync::fetchAdd;
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@queued
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    addi %a0 %s0 72;
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    call @kernel::sync::loadAcquire;
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    li %t0 HARTS;
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    bne %a0 %t0 @queued;
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@acquire
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    addi %a0 %s0 4;
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    call @kernel::sync::loadAcquire32;
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    bne %a0 %s2 @acquire;
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    // The protected count must follow ticket order across the u32 wrap.
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    addi %t1 %s2 4;
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    slli %t1 %t1 32;
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    srli %t1 %t1 32;
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    ld %t0 8(%s0);
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    bne %t0 %t1 @fail;
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    addi %t0 %t0 1;
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    sd %t0 8(%s0);
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    addi %a0 %s0 4;
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    addi %a1 %s2 1;
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    call @kernel::sync::storeRelease32;
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    addi %s1 %s1 -1;
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    bnez %s1 @ticket;
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    addi %a0 %s0 16;
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    li %a1 1;
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    call @kernel::sync::fetchAdd;
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    addi %a0 %a0 1;
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    li %t0 HARTS;
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    beq %a0 %t0 @check;
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@park
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    wfi;
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    j @park;
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@check
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    ld %t0 8(%s0);
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    li %t1 EXPECTED;
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    bne %t0 %t1 @fail;
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    lwu %t0 0(%s0);
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    lwu %t2 4(%s0);
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    bne %t0 %t2 @fail;
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    addi %t1 %t1 -4;
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    bne %t0 %t1 @fail;
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    addi %t2 %s0 32;
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    lr.w.aq %t0 (%t2);
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    bnez %t0 @fail;
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    li %t1 13;
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    sc.w.rl %t0 %t1 (%t2);
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    bnez %t0 @fail;
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    lr.d.aq %t0 (%t2);
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    bne %t0 %t1 @fail;
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    sc.d.rl %t0 %zero (%t2);
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    bnez %t0 @fail;
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    li %a0 0x02000000;
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    call @kernel::sync::read32;
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    bnez %a0 @fail;
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    j @success;
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@fail
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    li %a0 0x10001000;
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    li %a1 0x13333;
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    call @kernel::sync::write32;
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    ebreak;
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@success
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    li %a0 0x10001000;
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    li %a1 0x5555;
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    call @kernel::sync::write32;
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    ebreak;