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Remove support for lq, stq, lqarx and stqcx.

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They are optional in SFFS (scalar fixed-point and floating-point
subset), are not needed for running Linux, and add complexity, so
remove them.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
This commit is contained in:
Paul Mackerras
2022-06-04 17:37:48 +10:00
parent 0bd1e24024
commit c9e838b656
12 changed files with 0 additions and 364 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
decode1.vhdl
View File

@@ -93,7 +93,6 @@ architecture behaviour of decode1 is
43 => (LDST, NONE, OP_LOAD, RA_OR_ZERO, CONST_SI, NONE, RT, '0', '0', '0', '0', ZERO, '0', is2B, '0', '1', '1', '0', '0', '0', NONE, '0', '0', DUPD), -- lhau
40 => (LDST, NONE, OP_LOAD, RA_OR_ZERO, CONST_SI, NONE, RT, '0', '0', '0', '0', ZERO, '0', is2B, '0', '0', '0', '0', '0', '0', NONE, '0', '0', NONE), -- lhz
41 => (LDST, NONE, OP_LOAD, RA_OR_ZERO, CONST_SI, NONE, RT, '0', '0', '0', '0', ZERO, '0', is2B, '0', '0', '1', '0', '0', '0', NONE, '0', '0', DUPD), -- lhzu
56 => (LDST, NONE, OP_LOAD, RA_OR_ZERO, CONST_DQ, NONE, RT, '0', '0', '0', '0', ZERO, '0', is8B, '0', '0', '0', '0', '0', '0', NONE, '0', '0', DRTE), -- lq
32 => (LDST, NONE, OP_LOAD, RA_OR_ZERO, CONST_SI, NONE, RT, '0', '0', '0', '0', ZERO, '0', is4B, '0', '0', '0', '0', '0', '0', NONE, '0', '0', NONE), -- lwz
33 => (LDST, NONE, OP_LOAD, RA_OR_ZERO, CONST_SI, NONE, RT, '0', '0', '0', '0', ZERO, '0', is4B, '0', '0', '1', '0', '0', '0', NONE, '0', '0', DUPD), -- lwzu
7 => (ALU, NONE, OP_MUL_L64, RA, CONST_SI, NONE, RT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '1', NONE, '0', '0', NONE), -- mulli
@@ -310,7 +309,6 @@ architecture behaviour of decode1 is
2#1100110101# => (LDST, NONE, OP_LOAD, RA_OR_ZERO, RB, NONE, RT, '0', '0', '0', '0', ZERO, '0', is2B, '0', '0', '0', '0', '0', '0', NONE, '0', '0', NONE), -- lhzcix
2#0100110111# => (LDST, NONE, OP_LOAD, RA_OR_ZERO, RB, NONE, RT, '0', '0', '0', '0', ZERO, '0', is2B, '0', '0', '1', '0', '0', '0', NONE, '0', '0', DUPD), -- lhzux
2#0100010111# => (LDST, NONE, OP_LOAD, RA_OR_ZERO, RB, NONE, RT, '0', '0', '0', '0', ZERO, '0', is2B, '0', '0', '0', '0', '0', '0', NONE, '0', '0', NONE), -- lhzx
2#0100010100# => (LDST, NONE, OP_LOAD, RA_OR_ZERO, RB, NONE, RT, '0', '0', '0', '0', ZERO, '0', is8B, '0', '0', '0', '1', '0', '0', NONE, '0', '0', DRTE), -- lqarx
2#0000010100# => (LDST, NONE, OP_LOAD, RA_OR_ZERO, RB, NONE, RT, '0', '0', '0', '0', ZERO, '0', is4B, '0', '0', '0', '1', '0', '0', NONE, '0', '0', NONE), -- lwarx
2#0101110101# => (LDST, NONE, OP_LOAD, RA_OR_ZERO, RB, NONE, RT, '0', '0', '0', '0', ZERO, '0', is4B, '0', '1', '1', '0', '0', '0', NONE, '0', '0', DUPD), -- lwaux
2#0101010101# => (LDST, NONE, OP_LOAD, RA_OR_ZERO, RB, NONE, RT, '0', '0', '0', '0', ZERO, '0', is4B, '0', '1', '0', '0', '0', '0', NONE, '0', '0', NONE), -- lwax
@@ -393,7 +391,6 @@ architecture behaviour of decode1 is
2#1011010110# => (LDST, NONE, OP_STORE, RA_OR_ZERO, RB, RS, NONE, '0', '0', '0', '0', ZERO, '0', is2B, '0', '0', '0', '1', '0', '0', ONE, '0', '0', NONE), -- sthcx
2#0110110111# => (LDST, NONE, OP_STORE, RA_OR_ZERO, RB, RS, RA, '0', '0', '0', '0', ZERO, '0', is2B, '0', '0', '1', '0', '0', '0', NONE, '0', '0', NONE), -- sthux
2#0110010111# => (LDST, NONE, OP_STORE, RA_OR_ZERO, RB, RS, NONE, '0', '0', '0', '0', ZERO, '0', is2B, '0', '0', '0', '0', '0', '0', NONE, '0', '0', NONE), -- sthx
2#0010110110# => (LDST, NONE, OP_STORE, RA_OR_ZERO, RB, RS, NONE, '0', '0', '0', '0', ZERO, '0', is8B, '0', '0', '0', '1', '0', '0', ONE, '0', '0', DRSE), -- stqcx
2#1010010110# => (LDST, NONE, OP_STORE, RA_OR_ZERO, RB, RS, NONE, '0', '0', '0', '0', ZERO, '0', is4B, '1', '0', '0', '0', '0', '0', NONE, '0', '0', NONE), -- stwbrx
2#1110010101# => (LDST, NONE, OP_STORE, RA_OR_ZERO, RB, RS, NONE, '0', '0', '0', '0', ZERO, '0', is4B, '0', '0', '0', '0', '0', '0', NONE, '0', '0', NONE), -- stwcix
2#0010010110# => (LDST, NONE, OP_STORE, RA_OR_ZERO, RB, RS, NONE, '0', '0', '0', '0', ZERO, '0', is4B, '0', '0', '0', '1', '0', '0', ONE, '0', '0', NONE), -- stwcx
@@ -452,7 +449,6 @@ architecture behaviour of decode1 is
-- op in out A out in out len ext pipe
0 => (LDST, NONE, OP_STORE, RA_OR_ZERO, CONST_DS, RS, NONE, '0', '0', '0', '0', ZERO, '0', is8B, '0', '0', '0', '0', '0', '0', NONE, '0', '0', NONE), -- std
1 => (LDST, NONE, OP_STORE, RA_OR_ZERO, CONST_DS, RS, RA, '0', '0', '0', '0', ZERO, '0', is8B, '0', '0', '1', '0', '0', '0', NONE, '0', '0', NONE), -- stdu
2 => (LDST, NONE, OP_STORE, RA_OR_ZERO, CONST_DS, RS, NONE, '0', '0', '0', '0', ZERO, '0', is8B, '0', '0', '0', '0', '0', '0', NONE, '0', '0', DRSE), -- stq
others => decode_rom_init
);
@@ -652,13 +648,6 @@ begin
end case;
end if;
end if;
if std_match(f_in.insn(10 downto 1), "0100010100") then
-- lqarx, illegal if RA = RT or RB = RT
if f_in.insn(25 downto 21) = f_in.insn(20 downto 16) or
f_in.insn(25 downto 21) = f_in.insn(15 downto 11) then
vi.override := '1';
end if;
end if;
when 16 =>
-- CTR may be needed as input to bc
@@ -722,12 +711,6 @@ begin
when 30 =>
v.decode := decode_op_30_array(to_integer(unsigned(f_in.insn(4 downto 1))));
when 56 =>
-- lq, illegal if RA = RT
if f_in.insn(25 downto 21) = f_in.insn(20 downto 16) then
vi.override := '1';
end if;
when 58 =>
v.decode := decode_op_58_array(to_integer(unsigned(f_in.insn(1 downto 0))));

10
decode2.vhdl
View File

@@ -406,16 +406,6 @@ begin
v.e.repeat := '1';
v.e.second := dc2.repeat;
case d_in.decode.repeat is
when DRSE =>
-- do RS|1,RS for LE; RS,RS|1 for BE
if dc2.repeat = d_in.big_endian then
decoded_reg_c.reg(0) := '1';
end if;
when DRTE =>
-- do RT|1,RT for LE; RT,RT|1 for BE
if dc2.repeat = d_in.big_endian then
decoded_reg_o.reg(0) := '1';
end if;
when DUPD =>
-- update-form loads, 2nd instruction writes RA
if dc2.repeat = '1' then

2
decode_types.vhdl
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@@ -53,8 +53,6 @@ package decode_types is
type length_t is (NONE, is1B, is2B, is4B, is8B);
type repeat_t is (NONE, -- instruction is not repeated
DRSE, -- double RS, endian twist
DRTE, -- double RT, endian twist
DUPD); -- update-form load
type decode_rom_t is record

11
loadstore1.vhdl
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@@ -458,17 +458,6 @@ begin
-- check alignment for larx/stcx
misaligned := or (addr_mask and addr(2 downto 0));
v.align_intr := l_in.reserve and misaligned;
if l_in.repeat = '1' and l_in.second = '0' and l_in.update = '0' and addr(3) = '1' then
-- length is really 16 not 8
-- Make misaligned lq cause an alignment interrupt in LE mode,
-- in order to avoid the case with RA = RT + 1 where the second half
-- faults but the first doesn't (and updates RT+1, destroying RA).
-- The equivalent BE case doesn't occur because RA = RT is illegal.
misaligned := '1';
if l_in.reserve = '1' or (l_in.op = OP_LOAD and l_in.byte_reverse = '0') then
v.align_intr := '1';
end if;
end if;
v.atomic := not misaligned;
v.atomic_last := not misaligned and (l_in.second or not l_in.repeat);

60
tests/modes/head.S
View File

@@ -230,63 +230,3 @@ restore:
ld %r0,16(%r1)
mtlr %r0
blr
.global do_lq
do_lq:
lq %r6,0(%r3)
std %r6,0(%r4)
std %r7,8(%r4)
li %r3,0
blr
.global do_lq_np /* "non-preferred" form of lq */
do_lq_np:
mr %r7,%r3
lq %r6,0(%r7)
std %r6,0(%r4)
std %r7,8(%r4)
li %r3,0
blr
.global do_lq_bad /* illegal form of lq */
do_lq_bad:
mr %r6,%r3
.long 0xe0c60000 /* lq %r6,0(%r6) */
std %r6,0(%r4)
std %r7,8(%r4)
li %r3,0
blr
.global do_stq
do_stq:
ld %r8,0(%r4)
ld %r9,8(%r4)
stq %r8,0(%r3)
li %r3,0
blr
/* big-endian versions of the above */
.global do_lq_be
do_lq_be:
.long 0x0000c3e0
.long 0x0000c4f8
.long 0x0800e4f8
.long 0x00006038
.long 0x2000804e
.global do_lq_np_be /* "non-preferred" form of lq */
do_lq_np_be:
.long 0x781b677c
.long 0x0000c7e0
.long 0x0000c4f8
.long 0x0800e4f8
.long 0x00006038
.long 0x2000804e
.global do_stq_be
do_stq_be:
.long 0x000004e9
.long 0x080024e9
.long 0x020003f9
.long 0x00006038
.long 0x2000804e

171
tests/modes/modes.c
View File

@@ -12,14 +12,6 @@
extern unsigned long callit(unsigned long arg1, unsigned long arg2,
unsigned long fn, unsigned long msr);
extern void do_lq(void *src, unsigned long *regs);
extern void do_lq_np(void *src, unsigned long *regs);
extern void do_lq_bad(void *src, unsigned long *regs);
extern void do_stq(void *dst, unsigned long *regs);
extern void do_lq_be(void *src, unsigned long *regs);
extern void do_lq_np_be(void *src, unsigned long *regs);
extern void do_stq_be(void *dst, unsigned long *regs);
static inline void do_tlbie(unsigned long rb, unsigned long rs)
{
__asm__ volatile("tlbie %0,%1" : : "r" (rb), "r" (rs) : "memory");
@@ -302,167 +294,6 @@ int mode_test_6(void)
return 0;
}
int mode_test_7(void)
{
unsigned long quad[4] __attribute__((__aligned__(16)));
unsigned long regs[2];
unsigned long ret, msr;
/*
* Test lq/stq in LE mode
*/
msr = MSR_SF | MSR_LE;
quad[0] = 0x123456789abcdef0ul;
quad[1] = 0xfafa5959bcbc3434ul;
ret = callit((unsigned long)quad, (unsigned long)regs,
(unsigned long)&do_lq, msr);
if (ret)
return ret | 1;
if (regs[0] != quad[1] || regs[1] != quad[0])
return 2;
/* unaligned may give alignment interrupt */
quad[2] = 0x0011223344556677ul;
ret = callit((unsigned long)&quad[1], (unsigned long)regs,
(unsigned long)&do_lq, msr);
if (ret == 0) {
if (regs[0] != quad[2] || regs[1] != quad[1])
return 3;
} else if (ret == 0x600) {
if (mfspr(SPRG0) != (unsigned long) &do_lq ||
mfspr(DAR) != (unsigned long) &quad[1])
return ret | 4;
} else
return ret | 5;
/* try stq */
regs[0] = 0x5238523852385238ul;
regs[1] = 0x5239523952395239ul;
ret = callit((unsigned long)quad, (unsigned long)regs,
(unsigned long)&do_stq, msr);
if (ret)
return ret | 5;
if (quad[0] != regs[1] || quad[1] != regs[0])
return 6;
regs[0] = 0x0172686966746564ul;
regs[1] = 0xfe8d0badd00dabcdul;
ret = callit((unsigned long)quad + 1, (unsigned long)regs,
(unsigned long)&do_stq, msr);
if (ret)
return ret | 7;
if (((quad[0] >> 8) | (quad[1] << 56)) != regs[1] ||
((quad[1] >> 8) | (quad[2] << 56)) != regs[0])
return 8;
/* try lq non-preferred form */
quad[0] = 0x56789abcdef01234ul;
quad[1] = 0x5959bcbc3434fafaul;
ret = callit((unsigned long)quad, (unsigned long)regs,
(unsigned long)&do_lq_np, msr);
if (ret)
return ret | 9;
if (regs[0] != quad[1] || regs[1] != quad[0])
return 10;
/* unaligned should give alignment interrupt in uW implementation */
quad[2] = 0x6677001122334455ul;
ret = callit((unsigned long)&quad[1], (unsigned long)regs,
(unsigned long)&do_lq_np, msr);
if (ret == 0x600) {
if (mfspr(SPRG0) != (unsigned long) &do_lq_np + 4 ||
mfspr(DAR) != (unsigned long) &quad[1])
return ret | 11;
} else
return 12;
/* make sure lq with rt = ra causes an illegal instruction interrupt */
ret = callit((unsigned long)quad, (unsigned long)regs,
(unsigned long)&do_lq_bad, msr);
if (ret != 0x700)
return 13;
if (mfspr(SPRG0) != (unsigned long)&do_lq_bad + 4 ||
!(mfspr(SPRG3) & 0x80000))
return 14;
return 0;
}
int mode_test_8(void)
{
unsigned long quad[4] __attribute__((__aligned__(16)));
unsigned long regs[2];
unsigned long ret, msr;
/*
* Test lq/stq in BE mode
*/
msr = MSR_SF;
quad[0] = 0x123456789abcdef0ul;
quad[1] = 0xfafa5959bcbc3434ul;
ret = callit((unsigned long)quad, (unsigned long)regs,
(unsigned long)&do_lq_be, msr);
if (ret)
return ret | 1;
if (regs[0] != quad[0] || regs[1] != quad[1]) {
print_hex(regs[0], 16);
print_string(" ");
print_hex(regs[1], 16);
print_string(" ");
return 2;
}
/* don't expect alignment interrupt */
quad[2] = 0x0011223344556677ul;
ret = callit((unsigned long)&quad[1], (unsigned long)regs,
(unsigned long)&do_lq_be, msr);
if (ret == 0) {
if (regs[0] != quad[1] || regs[1] != quad[2])
return 3;
} else
return ret | 5;
/* try stq */
regs[0] = 0x5238523852385238ul;
regs[1] = 0x5239523952395239ul;
ret = callit((unsigned long)quad, (unsigned long)regs,
(unsigned long)&do_stq_be, msr);
if (ret)
return ret | 5;
if (quad[0] != regs[0] || quad[1] != regs[1])
return 6;
regs[0] = 0x0172686966746564ul;
regs[1] = 0xfe8d0badd00dabcdul;
ret = callit((unsigned long)quad + 1, (unsigned long)regs,
(unsigned long)&do_stq_be, msr);
if (ret)
return ret | 7;
if (((quad[0] >> 8) | (quad[1] << 56)) != regs[0] ||
((quad[1] >> 8) | (quad[2] << 56)) != regs[1]) {
print_hex(quad[0], 16);
print_string(" ");
print_hex(quad[1], 16);
print_string(" ");
print_hex(quad[2], 16);
print_string(" ");
return 8;
}
/* try lq non-preferred form */
quad[0] = 0x56789abcdef01234ul;
quad[1] = 0x5959bcbc3434fafaul;
ret = callit((unsigned long)quad, (unsigned long)regs,
(unsigned long)&do_lq_np_be, msr);
if (ret)
return ret | 9;
if (regs[0] != quad[0] || regs[1] != quad[1])
return 10;
/* unaligned should not give alignment interrupt in uW implementation */
quad[2] = 0x6677001122334455ul;
ret = callit((unsigned long)&quad[1], (unsigned long)regs,
(unsigned long)&do_lq_np_be, msr);
if (ret)
return ret | 11;
if (regs[0] != quad[1] || regs[1] != quad[2])
return 12;
return 0;
}
int fail = 0;
void do_test(int num, int (*test)(void))
@@ -507,8 +338,6 @@ int main(void)
do_test(4, mode_test_4);
do_test(5, mode_test_5);
do_test(6, mode_test_6);
do_test(7, mode_test_7);
do_test(8, mode_test_8);
return fail;
}

28
tests/reservation/head.S
View File

@@ -155,31 +155,3 @@ call_ret:
ld %r31,248(%r1)
addi %r1,%r1,256
blr
.global do_lqarx
do_lqarx:
/* r3 = src, r4 = regs */
lqarx %r10,0,%r3
std %r10,0(%r4)
std %r11,8(%r4)
li %r3,0
blr
.global do_lqarx_bad
do_lqarx_bad:
/* r3 = src, r4 = regs */
.long 0x7d405228 /* lqarx %r10,0,%r10 */
std %r10,0(%r4)
std %r11,8(%r4)
li %r3,0
blr
.global do_stqcx
do_stqcx:
/* r3 = dest, r4 = regs, return CR */
ld %r10,0(%r4)
ld %r11,8(%r4)
stqcx. %r10,0,%r3
mfcr %r3
oris %r3,%r3,1 /* to distinguish from trap number */
blr

62
tests/reservation/reservation.c
View File

@@ -7,10 +7,6 @@
extern unsigned long callit(unsigned long arg1, unsigned long arg2,
unsigned long (*fn)(unsigned long, unsigned long));
extern unsigned long do_lqarx(unsigned long src, unsigned long regs);
extern unsigned long do_lqarx_bad(unsigned long src, unsigned long regs);
extern unsigned long do_stqcx(unsigned long dst, unsigned long regs);
#define DSISR 18
#define DAR 19
#define SRR0 26
@@ -184,63 +180,6 @@ int resv_test_2(void)
return 0;
}
/* test lqarx/stqcx */
int resv_test_3(void)
{
unsigned long x[4] __attribute__((__aligned__(16)));
unsigned long y[2], regs[2];
unsigned long ret, offset;
int count;
x[0] = 0x7766554433221100ul;
x[1] = 0xffeeddccbbaa9988ul;
y[0] = 0x0badcafef00dd00dul;
y[1] = 0xdeadbeef07070707ul;
for (count = 0; count < 1000; ++count) {
ret = callit((unsigned long)x, (unsigned long)regs, do_lqarx);
if (ret)
return ret | 1;
ret = callit((unsigned long)x, (unsigned long)y, do_stqcx);
if (ret < 0x10000)
return ret | 2;
if (ret & 0x20000000)
break;
}
if (count == 1000)
return 3;
if (x[0] != y[1] || x[1] != y[0])
return 4;
if (regs[1] != 0x7766554433221100ul || regs[0] != 0xffeeddccbbaa9988ul)
return 5;
ret = callit((unsigned long)x, (unsigned long)regs, do_stqcx);
if (ret < 0x10000 || (ret & 0x20000000))
return ret | 12;
/* test alignment interrupts */
for (offset = 0; offset < 16; ++offset) {
ret = callit((unsigned long)x + offset, (unsigned long)regs, do_lqarx);
if (ret == 0 && (offset & 15) != 0)
return 6;
if (ret == 0x600) {
if ((offset & 15) == 0)
return ret + 7;
} else if (ret)
return ret;
ret = callit((unsigned long)x + offset, (unsigned long)y, do_stqcx);
if (ret >= 0x10000 && (offset & 15) != 0)
return 8;
if (ret == 0x600) {
if ((offset & 15) == 0)
return ret + 9;
} else if (ret < 0x10000)
return ret;
}
/* test illegal interrupt for bad lqarx case */
ret = callit((unsigned long)x, (unsigned long)regs, do_lqarx_bad);
if (ret != 0x700 || !(mfspr(SRR1) & 0x80000))
return ret + 10;
return 0;
}
int fail = 0;
void do_test(int num, int (*test)(void))
@@ -265,7 +204,6 @@ int main(void)
do_test(1, resv_test_1);
do_test(2, resv_test_2);
do_test(3, resv_test_3);
return fail;
}

BIN
tests/test_modes.bin
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Binary file not shown.

2
tests/test_modes.console_out
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@@ -4,5 +4,3 @@ test 03:PASS
test 04:PASS
test 05:PASS
test 06:PASS
test 07:PASS
test 08:PASS

BIN
tests/test_reservation.bin
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Binary file not shown.

1
tests/test_reservation.console_out
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@@ -1,3 +1,2 @@
test 01:PASS
test 02:PASS
test 03:PASS