Commit c305e32f authored by Max Filippov's avatar Max Filippov Committed by Blue Swirl
Browse files

target-xtensa: add MMU pagewalking tests 



Signed-off-by: default avatarMax Filippov <jcmvbkbc@gmail.com>
Signed-off-by: default avatarBlue Swirl <blauwirbel@gmail.com>
parent 57705a67

tests/tcg/xtensa/test_mmu.S

+207 −14
Original line number Diff line number Diff line
@@ -293,26 +293,219 @@ test store_prohibited 
    assert  eq, a2, a3

test_end



test dtlb_autoload

    set_vector kernel, 0



    movi    a2, 0xd4000000

/* Set up page table entry vaddr->paddr, ring=pte_ring, attr=pte_attr

 * and DTLB way 7 to cover this PTE, ring=pt_ring, attr=pt_attr

 */

.macro pt_setup pt_ring, pt_attr, pte_ring, vaddr, paddr, pte_attr

    movi    a2, 0x80000000

    wsr     a2, ptevaddr

    movi    a3, 0x00001013

    s32i    a3, a2, 4



    movi    a3, 0x80000007 | (((\vaddr) >> 10) & 0xfffff000) /* way 7 */

    movi    a4, 0x04000003 | ((\pt_ring) << 4) /* PADDR 64M */

    wdtlb   a4, a3

    isync



    movi    a3, ((\paddr) & 0xfffff000) | ((\pte_ring) << 4) | (\pte_attr)

    movi    a1, ((\vaddr) >> 12) << 2

    add     a2, a1, a2

    s32i    a3, a2, 0



    movi    a3, 0x80000007 | (((\vaddr) >> 10) & 0xfffff000) /* way 7 */

    movi    a4, 0x04000000 | ((\pt_ring) << 4) | (\pt_attr) /* PADDR 64M */

    wdtlb   a4, a3

    isync



    movi    a3, (\vaddr)

.endm



/* out: PS.RING=ring, PS.EXCM=excm, a3=vaddr */

.macro go_ring ring, excm, vaddr

    movi    a3, 10f

    pitlb   a3, a3

    ritlb1  a2, a3

    movi    a1, 0x10

    or      a2, a2, a1

    movi    a1, 0x000ff000

    and     a3, a3, a1

    movi    a1, 4

    or      a3, a3, a1

    witlb   a2, a3

    movi    a3, 10f

    movi    a1, 0x000fffff

    and     a1, a3, a1



    movi    a2, 0

    wsr     a2, excvaddr



    movi    a3, \vaddr

    movi    a2, 0x4000f | ((\ring) << 6) | ((\excm) << 4)

    jx      a1

10:

    wsr     a2, ps

    isync

.endm



/* in: a3 -- virtual address to test */

.macro assert_auto_tlb

    movi    a2, 0x4000f

    wsr     a2, ps

    isync

    pdtlb   a2, a3

    movi    a1, 0xfffff01f

    and     a2, a2, a1

    movi    a1, 0xfffff000

    and     a1, a1, a3

    xor     a1, a1, a2

    assert  gei, a1, 0x10

    movi    a2, 0x14

    assert  lt, a1, a2

.endm



/* in: a3 -- virtual address to test */

.macro assert_no_auto_tlb

    movi    a2, 0x4000f

    wsr     a2, ps

    isync

    pdtlb   a2, a3

    movi    a1, 0x10

    and     a1, a1, a2

    assert  eqi, a1, 0

    l8ui    a1, a3, 0

    pdtlb   a2, a3

    movi    a1, 0xfffff010

    and     a1, a1, a2

    movi    a3, 0x00001010

    assert  eq, a1, a3

    movi    a1, 0xf

.endm



.macro assert_sr sr, v

    rsr     a2, \sr

    movi    a1, (\v)

    assert  eq, a1, a2

.endm



.macro assert_epc1_1m vaddr

    movi    a2, (\vaddr)

    movi    a1, 0xfffff

    and     a1, a1, a2

    assert  lti, a1, 4

    rsr     a2, epc1

    assert  eq, a1, a2

.endm



test dtlb_autoload

    set_vector kernel, 0



    pt_setup    0, 3, 1, 0x1000, 0x1000, 3

    assert_no_auto_tlb



    l8ui    a1, a3, 0



    rsr     a2, excvaddr

    assert  eq, a2, a3



    assert_auto_tlb

test_end



test autoload_load_store_privilege

    set_vector kernel, 0

    set_vector double, 2f



    pt_setup    0, 3, 0, 0x2000, 0x2000, 3

    movi    a3, 0x2004

    assert_no_auto_tlb



    movi    a2, 0x4005f    /* ring 1 + excm => cring == 0 */

    wsr     a2, ps

    isync

1:

    l32e    a2, a3, -4     /* ring used */

    test_fail

2:

    rsr     a2, excvaddr

    addi    a1, a3, -4

    assert  eq, a1, a2



    assert_auto_tlb

    assert_sr depc, 1b

    assert_sr exccause, 26

test_end



test autoload_pte_load_prohibited

    set_vector kernel, 2f



    pt_setup    0, 3, 0, 0x3000, 0, 0xc

    assert_no_auto_tlb

1:

    l32i    a2, a3, 0

    test_fail

2:

    rsr     a2, excvaddr

    assert  eq, a2, a3



    assert_auto_tlb

    assert_sr epc1, 1b

    assert_sr exccause, 28

test_end



test autoload_pt_load_prohibited

    set_vector kernel, 2f



    pt_setup    0, 0xc, 0, 0x4000, 0x4000, 3

    assert_no_auto_tlb

1:

    l32i    a2, a3, 0

    test_fail

2:

    rsr     a2, excvaddr

    assert  eq, a2, a3



    assert_no_auto_tlb

    assert_sr epc1, 1b

    assert_sr exccause, 24

test_end



test autoload_pt_privilege

    set_vector  kernel, 2f

    pt_setup    0, 3, 1, 0x5000, 0, 3

    go_ring     1, 0, 0x5001



    l8ui    a2, a3, 0

1:

    syscall

2:

    rsr     a2, excvaddr

    assert  eq, a2, a3



    assert_auto_tlb

    assert_epc1_1m 1b

    assert_sr exccause, 1

test_end



test autoload_pte_privilege

    set_vector  kernel, 2f

    pt_setup    0, 3, 0, 0x6000, 0, 3

    go_ring     1, 0, 0x6001

1:

    l8ui    a2, a3, 0

    syscall

2:

    rsr     a2, excvaddr

    assert  eq, a2, a3



    assert_auto_tlb

    assert_epc1_1m 1b

    assert_sr exccause, 26

test_end



test autoload_3_level_pt

    set_vector  kernel, 2f

    pt_setup    1, 3, 1, 0x00400000, 0, 3

    pt_setup    1, 3, 1, 0x80001000, 0x2000000, 3

    go_ring     1, 0, 0x00400001

1:

    l8ui    a2, a3, 0

    syscall

2:

    rsr     a2, excvaddr

    assert  eq, a2, a3



    assert_no_auto_tlb

    assert_epc1_1m 1b

    assert_sr exccause, 24

test_end



test_suite_end