Merge pull request #155 from mikey/exceptions

Add decrementer, illegal and system call exceptions
jtag-port
Anton Blanchard 5 years ago committed by GitHub
commit d3291dbdf0
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GPG Key ID: 4AEE18F83AFDEB23

5
.gitignore vendored

@ -3,4 +3,7 @@
*.cf
*.s
*_tb
main_ram.bin
main_ram.bin
tests/*/*.bin
tests/*/*.hex
tests/*/*.elf

@ -128,14 +128,18 @@ dmi_dtm_tb: dmi_dtm_tb.o sim_vhpi_c.o sim_bram_helpers_c.o
$(GHDL) -e $(GHDLFLAGS) -Wl,sim_vhpi_c.o -Wl,sim_bram_helpers_c.o $@

tests = $(sort $(patsubst tests/%.out,%,$(wildcard tests/*.out)))
tests_console = $(sort $(patsubst tests/%.console_out,%,$(wildcard tests/*.console_out)))

check: $(tests) test_micropython test_micropython_long
check: $(tests) $(test_console) test_micropython test_micropython_long

check_light: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 test_micropython test_micropython_long
check_light: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 test_micropython test_micropython_long $(tests_console)

$(tests): core_tb
@./scripts/run_test.sh $@

$(tests_console): core_tb
@./scripts/run_test_console.sh $@

test_micropython: core_tb
@./scripts/test_micropython.py


@ -16,6 +16,7 @@ package common is
constant SPR_LR : spr_num_t := 8;
constant SPR_CTR : spr_num_t := 9;
constant SPR_TB : spr_num_t := 268;
constant SPR_DEC : spr_num_t := 22;
constant SPR_SRR0 : spr_num_t := 26;
constant SPR_SRR1 : spr_num_t := 27;
constant SPR_HSRR0 : spr_num_t := 314;
@ -62,9 +63,16 @@ package common is
end record;
constant xerc_init : xer_common_t := (others => '0');

type irq_state_t is (WRITE_SRR0, WRITE_SRR1);

-- This needs to die...
type ctrl_t is record
tb: std_ulogic_vector(63 downto 0);
dec: std_ulogic_vector(63 downto 0);
msr: std_ulogic_vector(63 downto 0);
irq_state : irq_state_t;
irq_nia: std_ulogic_vector(63 downto 0);
srr1: std_ulogic_vector(63 downto 0);
end record;

type Fetch1ToIcacheType is record

@ -94,6 +94,7 @@ architecture behaviour of decode1 is
2#0011000001# => '1', -- crxor
2#0010010110# => '1', -- isync
2#0000000000# => '1', -- mcrf
2#0000010010# => '1', -- rfid
others => '0'
);

@ -109,6 +110,8 @@ architecture behaviour of decode1 is
2#100# => (ALU, OP_BCREG, SPR, SPR, NONE, SPR, '1', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', NONE, '1', '0'),
-- isync
2#111# => (ALU, OP_ISYNC, NONE, NONE, NONE, NONE, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', NONE, '0', '1'),
-- rfid
2#101# => (ALU, OP_RFID, SPR, SPR, NONE, NONE, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', NONE, '0', '0'),
others => illegal_inst
);

@ -241,12 +244,14 @@ architecture behaviour of decode1 is
-- 2#1000000000# mcrxr
-- 2#1001000000# mcrxrx
2#0000010011# => (ALU, OP_MFCR, NONE, NONE, NONE, RT, '1', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', NONE, '0', '0'), -- mfcr/mfocrf
2#0001010011# => (ALU, OP_MFMSR, NONE, NONE, NONE, RT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', NONE, '0', '1'), -- mfmsr
2#0101010011# => (ALU, OP_MFSPR, SPR, NONE, NONE, RT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', NONE, '0', '0'), -- mfspr
2#0100001001# => (ALU, OP_MOD, RA, RB, NONE, RT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', NONE, '0', '0'), -- modud
2#0100001011# => (ALU, OP_MOD, RA, RB, NONE, RT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '1', '0', NONE, '0', '0'), -- moduw
2#1100001001# => (ALU, OP_MOD, RA, RB, NONE, RT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '1', NONE, '0', '0'), -- modsd
2#1100001011# => (ALU, OP_MOD, RA, RB, NONE, RT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '1', '1', NONE, '0', '0'), -- modsw
2#0010010000# => (ALU, OP_MTCRF, NONE, NONE, RS, NONE, '0', '1', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', NONE, '0', '0'), -- mtcrf/mtocrf
2#0010110010# => (ALU, OP_MTMSRD, NONE, NONE, RS, NONE, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', NONE, '0', '1'), -- mtmsrd # ignore top bits and d
2#0111010011# => (ALU, OP_MTSPR, NONE, NONE, RS, SPR, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', NONE, '0', '0'), -- mtspr
2#0001001001# => (ALU, OP_MUL_H64, RA, RB, NONE, RT, '0', '1', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '1', RC, '0', '0'), -- mulhd
2#0000001001# => (ALU, OP_MUL_H64, RA, RB, NONE, RT, '0', '1', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', RC, '0', '0'), -- mulhdu
@ -337,8 +342,9 @@ architecture behaviour of decode1 is

-- unit internal in1 in2 in3 out CR CR inv inv cry cry ldst BR sgn upd rsrv 32b sgn rc lk sgl
-- op in out A out in out len ext pipe
constant attn_instr : decode_rom_t := (ALU, OP_ILLEGAL, NONE, NONE, NONE, NONE, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', NONE, '0', '1');
constant attn_instr : decode_rom_t := (ALU, OP_ATTN, NONE, NONE, NONE, NONE, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', NONE, '0', '1');
constant nop_instr : decode_rom_t := (ALU, OP_NOP, NONE, NONE, NONE, NONE, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', NONE, '0', '0');
constant sc_instr : decode_rom_t := (ALU, OP_SC, NONE, NONE, NONE, NONE, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', NONE, '0', '0');
constant sim_cfg_instr : decode_rom_t := (ALU, OP_SIM_CONFIG,NONE, NONE, NONE, RT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', NONE, '0', '1');

begin
@ -397,6 +403,9 @@ begin
elsif std_match(f_in.insn, "01100000000000000000000000000000") then
report "PPC_nop";
v.decode := nop_instr;
elsif std_match(f_in.insn, "010001--------------0000000---1-") then
report "PPC_sc";
v.decode := sc_instr;
elsif std_match(f_in.insn, "000001---------------0000000011-") then
report "PPC_SIM_CONFIG";
v.decode := sim_cfg_instr;
@ -433,6 +442,10 @@ begin
if is_fast_spr(v.ispr1) = '0' then
v.decode.sgl_pipe := '1';
end if;
elsif v.decode.insn_type = OP_RFID then
report "PPC RFID";
v.ispr1 := fast_spr_num(SPR_SRR0);
v.ispr2 := fast_spr_num(SPR_SRR1);
end if;

if flush_in = '1' then

@ -11,16 +11,15 @@ package decode_types is
OP_DCBZ, OP_DIV, OP_DIVE, OP_EXTS,
OP_EXTSWSLI, OP_ICBI, OP_ICBT, OP_ISEL, OP_ISYNC,
OP_LOAD, OP_STORE, OP_MADDHD, OP_MADDHDU, OP_MADDLD, OP_MCRF,
OP_MCRXR, OP_MCRXRX, OP_MFCR, OP_MFSPR, OP_MOD,
OP_MTCRF, OP_MTSPR, OP_MUL_L64,
OP_MCRXR, OP_MCRXRX, OP_MFCR, OP_MFMSR, OP_MFSPR, OP_MOD,
OP_MTCRF, OP_MTMSRD, OP_MTSPR, OP_MUL_L64,
OP_MUL_H64, OP_MUL_H32, OP_OR,
OP_POPCNT, OP_PRTY,
OP_RLC, OP_RLCL, OP_RLCR, OP_SETB,
OP_POPCNT, OP_PRTY, OP_RFID,
OP_RLC, OP_RLCL, OP_RLCR, OP_SC, OP_SETB,
OP_SHL, OP_SHR,
OP_SYNC, OP_TD, OP_TDI, OP_TW,
OP_TWI, OP_XOR, OP_SIM_CONFIG
);

type input_reg_a_t is (NONE, RA, RA_OR_ZERO, SPR);
type input_reg_b_t is (NONE, RB, CONST_UI, CONST_SI, CONST_SI_HI, CONST_UI_HI, CONST_LI, CONST_BD, CONST_DS, CONST_M1, CONST_SH, CONST_SH32, SPR);
type input_reg_c_t is (NONE, RS);

@ -53,9 +53,8 @@ architecture behaviour of execute1 is

signal a_in, b_in, c_in : std_ulogic_vector(63 downto 0);

signal ctrl: ctrl_t := (others => (others => '0'));
signal ctrl_tmp: ctrl_t := (others => (others => '0'));

signal ctrl: ctrl_t := (irq_state => WRITE_SRR0, others => (others => '0'));
signal ctrl_tmp: ctrl_t := (irq_state => WRITE_SRR0, others => (others => '0'));
signal right_shift, rot_clear_left, rot_clear_right: std_ulogic;
signal rotator_result: std_ulogic_vector(63 downto 0);
signal rotator_carry: std_ulogic;
@ -112,6 +111,27 @@ architecture behaviour of execute1 is
end case;
end;

function msr_copy(msr: std_ulogic_vector(63 downto 0))
return std_ulogic_vector is
variable msr_out: std_ulogic_vector(63 downto 0);
begin
-- ISA says this:
-- Defined MSR bits are classified as either full func-
-- tion or partial function. Full function MSR bits are
-- saved in SRR1 or HSRR1 when an interrupt other
-- than a System Call Vectored interrupt occurs and
-- restored by rfscv, rfid, or hrfid, while partial func-
-- tion MSR bits are not saved or restored.
-- Full function MSR bits lie in the range 0:32, 37:41, and
-- 48:63, and partial function MSR bits lie in the range
-- 33:36 and 42:47.
msr_out := (others => '0');
msr_out(32 downto 0) := msr(32 downto 0);
msr_out(41 downto 37) := msr(41 downto 37);
msr_out(63 downto 48) := msr(63 downto 48);
return msr_out;
end;

begin

rotator_0: entity work.rotator
@ -215,6 +235,8 @@ begin
variable msb_a, msb_b : std_ulogic;
variable a_lt : std_ulogic;
variable lv : Execute1ToLoadstore1Type;
variable irq_valid : std_ulogic;
variable exception : std_ulogic;
begin
result := (others => '0');
result_with_carry := (others => '0');
@ -341,6 +363,13 @@ begin
ctrl_tmp <= ctrl;
-- FIXME: run at 512MHz not core freq
ctrl_tmp.tb <= std_ulogic_vector(unsigned(ctrl.tb) + 1);
ctrl_tmp.dec <= std_ulogic_vector(unsigned(ctrl.dec) - 1);

irq_valid := '0';
if ctrl.msr(63 - 48) = '1' and ctrl.dec(63) = '1' then
report "IRQ valid";
irq_valid := '1';
end if;

terminate_out <= '0';
icache_inval <= '0';
@ -355,7 +384,28 @@ begin
rot_clear_left <= '1' when e_in.insn_type = OP_RLC or e_in.insn_type = OP_RLCL else '0';
rot_clear_right <= '1' when e_in.insn_type = OP_RLC or e_in.insn_type = OP_RLCR else '0';

if e_in.valid = '1' then
ctrl_tmp.irq_state <= WRITE_SRR0;
exception := '0';

if ctrl.irq_state = WRITE_SRR1 then
v.e.write_reg := fast_spr_num(SPR_SRR1);
result := ctrl.srr1;
result_en := '1';
ctrl_tmp.msr(63 - 48) <= '0'; -- clear EE
f_out.redirect <= '1';
f_out.redirect_nia <= ctrl.irq_nia;
v.e.valid := '1';
report "Writing SRR1: " & to_hstring(ctrl.srr1);

elsif irq_valid = '1' then
-- we need two cycles to write srr0 and 1
-- will need more when we have to write DSISR, DAR and HIER
exception := '1';
ctrl_tmp.irq_nia <= std_logic_vector(to_unsigned(16#900#, 64));
ctrl_tmp.srr1 <= msr_copy(ctrl.msr);
result := e_in.nia;

elsif e_in.valid = '1' then

v.e.valid := '1';
v.e.write_reg := e_in.write_reg;
@ -367,8 +417,28 @@ begin
case_0: case e_in.insn_type is

when OP_ILLEGAL =>
terminate_out <= '1';
-- we need two cycles to write srr0 and 1
-- will need more when we have to write DSISR, DAR and HIER
exception := '1';
ctrl_tmp.irq_nia <= std_logic_vector(to_unsigned(16#700#, 64));
ctrl_tmp.srr1 <= msr_copy(ctrl.msr);
-- Since we aren't doing Hypervisor emulation assist (0xe40) we
-- set bit 44 to indicate we have an illegal
ctrl_tmp.srr1(63 - 44) <= '1';
result := e_in.nia;
report "illegal";
when OP_SC =>
-- FIXME Assume everything is SC (not SCV) for now
-- we need two cycles to write srr0 and 1
-- will need more when we have to write DSISR, DAR and HIER
exception := '1';
ctrl_tmp.irq_nia <= std_logic_vector(to_unsigned(16#C00#, 64));
ctrl_tmp.srr1 <= msr_copy(ctrl.msr);
result := std_logic_vector(unsigned(e_in.nia) + 4);
report "sc";
when OP_ATTN =>
terminate_out <= '1';
report "ATTN";
when OP_NOP =>
-- Do nothing
when OP_ADD | OP_CMP =>
@ -474,6 +544,11 @@ begin
f_out.redirect <= '1';
f_out.redirect_nia <= b_in(63 downto 2) & "00";
end if;

when OP_RFID =>
f_out.redirect <= '1';
f_out.redirect_nia <= a_in(63 downto 2) & "00"; -- srr0
ctrl_tmp.msr <= msr_copy(std_ulogic_vector(signed(b_in))); -- srr1
when OP_CMPB =>
result := ppc_cmpb(c_in, b_in);
result_en := '1';
@ -546,7 +621,12 @@ begin
end if;
end loop;
end if;
when OP_MFMSR =>
result := msr_copy(ctrl.msr);
result_en := '1';
when OP_MFSPR =>
report "MFSPR to SPR " & integer'image(decode_spr_num(e_in.insn)) &
"=" & to_hstring(a_in);
if is_fast_spr(e_in.read_reg1) then
result := a_in;
if decode_spr_num(e_in.insn) = SPR_XER then
@ -563,6 +643,8 @@ begin
case decode_spr_num(e_in.insn) is
when SPR_TB =>
result := ctrl.tb;
when SPR_DEC =>
result := ctrl.dec;
when others =>
result := (others => '0');
end case;
@ -596,6 +678,9 @@ begin
v.e.write_cr_mask := num_to_fxm(crnum);
end if;
v.e.write_cr_data := c_in(31 downto 0);
when OP_MTMSRD =>
-- FIXME handle just the bits we need to.
ctrl_tmp.msr <= msr_copy(c_in);
when OP_MTSPR =>
report "MTSPR to SPR " & integer'image(decode_spr_num(e_in.insn)) &
"=" & to_hstring(c_in);
@ -611,10 +696,12 @@ begin
v.e.write_xerc_enable := '1';
end if;
else
-- TODO: Implement slow SPRs
-- case decode_spr_num(e_in.insn) is
-- when others =>
-- end case;
-- slow spr
case decode_spr_num(e_in.insn) is
when SPR_DEC =>
ctrl_tmp.dec <= c_in;
when others =>
end case;
end if;
when OP_POPCNT =>
result := popcnt_result;
@ -730,6 +817,16 @@ begin
end if;
end if;

if exception = '1' then
v.e.write_reg := fast_spr_num(SPR_SRR0);
if e_in.valid = '1' then
result_en := '1';
ctrl_tmp.irq_state <= WRITE_SRR1;
stall_out <= '1';
v.e.valid := '0';
end if;
end if;

v.e.write_data := result;
v.e.write_enable := result_en;


@ -15,8 +15,8 @@ LDFLAGS = -T powerpc.lds

all: hello_world.hex

hello_world.elf: hello_world.o head.o
$(LD) $(LDFLAGS) -o hello_world.elf hello_world.o head.o
hello_world.elf: hello_world.o head.o console.o
$(LD) $(LDFLAGS) -o hello_world.elf hello_world.o head.o console.o

hello_world.bin: hello_world.elf
$(OBJCOPY) -O binary hello_world.elf hello_world.bin

@ -0,0 +1,132 @@
#include <unistd.h>
#include <string.h>
#include <stdint.h>
#include <stdbool.h>

/*
* Core UART functions to implement for a port
*/

static uint64_t potato_uart_base;

#define PROC_FREQ 50000000
#define UART_FREQ 115200
#define UART_BASE 0xc0002000

#define POTATO_CONSOLE_TX 0x00
#define POTATO_CONSOLE_RX 0x08
#define POTATO_CONSOLE_STATUS 0x10
#define POTATO_CONSOLE_STATUS_RX_EMPTY 0x01
#define POTATO_CONSOLE_STATUS_TX_EMPTY 0x02
#define POTATO_CONSOLE_STATUS_RX_FULL 0x04
#define POTATO_CONSOLE_STATUS_TX_FULL 0x08
#define POTATO_CONSOLE_CLOCK_DIV 0x18
#define POTATO_CONSOLE_IRQ_EN 0x20

static uint64_t potato_uart_reg_read(int offset)
{
uint64_t addr;
uint64_t val;

addr = potato_uart_base + offset;

val = *(volatile uint64_t *)addr;

return val;
}

static void potato_uart_reg_write(int offset, uint64_t val)
{
uint64_t addr;

addr = potato_uart_base + offset;

*(volatile uint64_t *)addr = val;
}

static int potato_uart_rx_empty(void)
{
uint64_t val;

val = potato_uart_reg_read(POTATO_CONSOLE_STATUS);

if (val & POTATO_CONSOLE_STATUS_RX_EMPTY)
return 1;

return 0;
}

static int potato_uart_tx_full(void)
{
uint64_t val;

val = potato_uart_reg_read(POTATO_CONSOLE_STATUS);

if (val & POTATO_CONSOLE_STATUS_TX_FULL)
return 1;

return 0;
}

static char potato_uart_read(void)
{
uint64_t val;

val = potato_uart_reg_read(POTATO_CONSOLE_RX);

return (char)(val & 0x000000ff);
}

static void potato_uart_write(char c)
{
uint64_t val;

val = c;

potato_uart_reg_write(POTATO_CONSOLE_TX, val);
}

static unsigned long potato_uart_divisor(unsigned long proc_freq, unsigned long uart_freq)
{
return proc_freq / (uart_freq * 16) - 1;
}

void potato_uart_init(void)
{
potato_uart_base = UART_BASE;

potato_uart_reg_write(POTATO_CONSOLE_CLOCK_DIV, potato_uart_divisor(PROC_FREQ, UART_FREQ));
}

int getchar(void)
{
while (potato_uart_rx_empty())
/* Do nothing */ ;

return potato_uart_read();
}

void putchar(unsigned char c)
{
while (potato_uart_tx_full())
/* Do Nothing */;

potato_uart_write(c);
}

void putstr(const char *str, unsigned long len)
{
for (unsigned long i = 0; i < len; i++) {
putchar(str[i]);
}
}

size_t strlen(const char *s)
{
size_t len = 0;

while (*s++)
len++;

return len;
}

@ -0,0 +1,5 @@
void potato_uart_init(void);
int getchar(void);
void putchar(unsigned char c);
void putstr(const char *str, unsigned long len);
size_t strlen(const char *s);

@ -3,133 +3,7 @@
#include <stdint.h>
#include <stdbool.h>

/*
* Core UART functions to implement for a port
*/

static uint64_t potato_uart_base;

#define PROC_FREQ 50000000
#define UART_FREQ 115200
#define UART_BASE 0xc0002000

#define POTATO_CONSOLE_TX 0x00
#define POTATO_CONSOLE_RX 0x08
#define POTATO_CONSOLE_STATUS 0x10
#define POTATO_CONSOLE_STATUS_RX_EMPTY 0x01
#define POTATO_CONSOLE_STATUS_TX_EMPTY 0x02
#define POTATO_CONSOLE_STATUS_RX_FULL 0x04
#define POTATO_CONSOLE_STATUS_TX_FULL 0x08
#define POTATO_CONSOLE_CLOCK_DIV 0x18
#define POTATO_CONSOLE_IRQ_EN 0x20

static uint64_t potato_uart_reg_read(int offset)
{
uint64_t addr;
uint64_t val;

addr = potato_uart_base + offset;

val = *(volatile uint64_t *)addr;

return val;
}

static void potato_uart_reg_write(int offset, uint64_t val)
{
uint64_t addr;

addr = potato_uart_base + offset;

*(volatile uint64_t *)addr = val;
}

static int potato_uart_rx_empty(void)
{
uint64_t val;

val = potato_uart_reg_read(POTATO_CONSOLE_STATUS);

if (val & POTATO_CONSOLE_STATUS_RX_EMPTY)
return 1;

return 0;
}

static int potato_uart_tx_full(void)
{
uint64_t val;

val = potato_uart_reg_read(POTATO_CONSOLE_STATUS);

if (val & POTATO_CONSOLE_STATUS_TX_FULL)
return 1;

return 0;
}

static char potato_uart_read(void)
{
uint64_t val;

val = potato_uart_reg_read(POTATO_CONSOLE_RX);

return (char)(val & 0x000000ff);
}

static void potato_uart_write(char c)
{
uint64_t val;

val = c;

potato_uart_reg_write(POTATO_CONSOLE_TX, val);
}

static unsigned long potato_uart_divisor(unsigned long proc_freq, unsigned long uart_freq)
{
return proc_freq / (uart_freq * 16) - 1;
}

void potato_uart_init(void)
{
potato_uart_base = UART_BASE;

potato_uart_reg_write(POTATO_CONSOLE_CLOCK_DIV, potato_uart_divisor(PROC_FREQ, UART_FREQ));
}

int getchar(void)
{
while (potato_uart_rx_empty())
/* Do nothing */ ;

return potato_uart_read();
}

void putchar(unsigned char c)
{
while (potato_uart_tx_full())
/* Do Nothing */;

potato_uart_write(c);
}

void putstr(const char *str, unsigned long len)
{
for (unsigned long i = 0; i < len; i++) {
putchar(str[i]);
}
}

size_t strlen(const char *s)
{
size_t len = 0;

while (*s++)
len++;

return len;
}
#include "console.h"

#define HELLO_WORLD "Hello World\r\n"


@ -0,0 +1,38 @@
#!/bin/bash

# Runs a test and checks the console output against known good output

if [ $# -ne 1 ]; then
echo "Usage: run_test.sh <test>"
exit 1
fi

TEST=$1

TMPDIR=$(mktemp -d)

function finish {
rm -rf "$TMPDIR"
}

trap finish EXIT

MICROWATT_DIR=$PWD

cd $TMPDIR

cp ${MICROWATT_DIR}/tests/${TEST}.bin main_ram.bin

${MICROWATT_DIR}/core_tb > /dev/null 2> test1.out || true

grep -v "Failed to bind debug socket" test1.out > test.out

cp ${MICROWATT_DIR}/tests/${TEST}.console_out exp.out

cp test.out /tmp
cp exp.out /tmp

diff -q test.out exp.out && echo "$TEST PASS" && exit 0

echo "$TEST FAIL ********"
exit 1

@ -0,0 +1,28 @@
ARCH = $(shell uname -m)
ifneq ("$(ARCH)", "ppc64")
ifneq ("$(ARCH)", "ppc64le")
CROSS_COMPILE = powerpc64le-linux-
endif
endif

CC = $(CROSS_COMPILE)gcc
LD = $(CROSS_COMPILE)ld
OBJCOPY = $(CROSS_COMPILE)objcopy

CFLAGS = -Os -g -Wall -std=c99 -msoft-float -mno-string -mno-multiple -mno-vsx -mno-altivec -mlittle-endian -fno-stack-protector -mstrict-align -ffreestanding -fdata-sections -ffunction-sections -I ../../hello_world
ASFLAGS = $(CFLAGS)
LDFLAGS = -T powerpc.lds

all: $(TEST).hex

$(TEST).elf: $(TEST).o head.o ../../hello_world/console.o
$(LD) $(LDFLAGS) -o $(TEST).elf $(TEST).o head.o ../../hello_world/console.o

$(TEST).bin: $(TEST).elf
$(OBJCOPY) -O binary $(TEST).elf $(TEST).bin

$(TEST).hex: $(TEST).bin
../../scripts/bin2hex.py $(TEST).bin > $(TEST).hex

clean:
@rm -f *.o $(TEST).elf $(TEST).bin $(TEST).hex

@ -0,0 +1,3 @@
TEST=decrementer

include ../Makefile.test

@ -0,0 +1,54 @@
#include <unistd.h>
#include <string.h>
#include <stdint.h>
#include <stdbool.h>

#include "console.h"

#define TEST "Test "
#define PASS "PASS\r\n"
#define FAIL "FAIL\r\n"

extern int dec_test_1(void);
extern int dec_test_2(void);
extern int dec_test_3(void);

// i < 100
void print_test_number(int i)
{
putstr(TEST, strlen(TEST));
putchar(48 + i/10);
putchar(48 + i%10);
putstr(":", 1);
}

int main(void)
{
int fail = 0;

potato_uart_init();

print_test_number(1);
if (dec_test_1() != 0) {
fail = 1;
putstr(FAIL, strlen(FAIL));
} else
putstr(PASS, strlen(PASS));

print_test_number(2);
if (dec_test_2() != 0) {
fail = 1;
putstr(FAIL, strlen(FAIL));
} else
putstr(PASS, strlen(PASS));


print_test_number(3);
if (dec_test_3() != 0) {
fail = 1;
putstr(FAIL, strlen(FAIL));
} else
putstr(PASS, strlen(PASS));

return fail;
}

@ -0,0 +1,161 @@
/* Copyright 2013-2014 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

#define STACK_TOP 0x2000

/* Load an immediate 64-bit value into a register */
#define LOAD_IMM64(r, e) \
lis r,(e)@highest; \
ori r,r,(e)@higher; \
rldicr r,r, 32, 31; \
oris r,r, (e)@h; \
ori r,r, (e)@l;

.section ".head","ax"

/*
* Microwatt currently enters in LE mode at 0x0, so we don't need to
* do any endian fix ups
*/
. = 0
.global _start
_start:
b boot_entry

.global boot_entry
boot_entry:
/* setup stack */
LOAD_IMM64(%r1, STACK_TOP - 0x100)
LOAD_IMM64(%r12, main)
mtctr %r12
bctrl
attn // terminate on exit
b .

/* test to see if end up at the instruction after the rfid */
.global dec_test_1
dec_test_1:
li %r3, 0
mtdec %r3
LOAD_IMM64(%r3, dec_test_1_rfid)
mtsrr0 %r3
LOAD_IMM64(%r3, 0x9000000000008003)
mtsrr1 %r3
li %r3, 1 // preload with a fail code
rfid
dec_test_1_rfid:
b 1f // should be skipped
b 1f // should be skipped
li %r3, 0
blr
1:
li %r3, 1
blr


/* test to see if end up at the instruction after the rfid */
.global dec_test_2
dec_test_2:
li %r3, 0x100
mtdec %r3
LOAD_IMM64(%r3, dec_test_2_rfid)
mtsrr0 %r3
LOAD_IMM64(%r3, 0x9000000000008003)
mtsrr1 %r3
li %r3, 1 // preload with a fail code
rfid
dec_test_2_rfid:
b . // should wait here and then be skipped
b 1f // should be skipped
li %r3, 0
blr
1:
li %r3, 1
blr


/* test mtmsrd */
.global dec_test_3
dec_test_3:
LOAD_IMM64(%r3, 0x9000000000000003)
mtmsrd %r3 // EE off
li %r3, 0x0 // shouldn't fire right away
mtdec %r3
b 2f
nop
b 1f // shouln't get here
2:
LOAD_IMM64(%r3, 0x9000000000008003)
mtmsrd %r3 // EE on
b 1f // shouln't get here
b 1f // shouln't get here

li %r3, 0
blr
1:
li %r3, 1
blr

#define EXCEPTION(nr) \
.= nr ;\
b .

/* More exception stubs */
EXCEPTION(0x300)
EXCEPTION(0x380)
EXCEPTION(0x400)
EXCEPTION(0x480)
EXCEPTION(0x500)
EXCEPTION(0x600)
EXCEPTION(0x700)
EXCEPTION(0x800)

. = 0x900
mtsprg0 %r3
LOAD_IMM64(%r3, 0x000000000ffffff)
mtdec %r3
mfsrr0 %r3
addi %r3, %r3, 8 // skip 2 instructions
mtsrr0 %r3
mfsprg0 %r3
rfid

EXCEPTION(0x980)
EXCEPTION(0xa00)
EXCEPTION(0xb00)
EXCEPTION(0xc00)
EXCEPTION(0xd00)
EXCEPTION(0xe00)
EXCEPTION(0xe20)
EXCEPTION(0xe40)
EXCEPTION(0xe60)
EXCEPTION(0xe80)
EXCEPTION(0xf00)
EXCEPTION(0xf20)
EXCEPTION(0xf40)
EXCEPTION(0xf60)
EXCEPTION(0xf80)
#if 0
EXCEPTION(0x1000)
EXCEPTION(0x1100)
EXCEPTION(0x1200)
EXCEPTION(0x1300)
EXCEPTION(0x1400)
EXCEPTION(0x1500)
EXCEPTION(0x1600)
#endif


@ -0,0 +1,13 @@
SECTIONS
{
_start = .;
. = 0;
.head : {
KEEP(*(.head))
}
. = 0x1000;
.text : { *(.text) }
. = 0x2000;
.data : { *(.data) }
.bss : { *(.bss) }
}

@ -0,0 +1,3 @@
TEST=illegal

include ../Makefile.test

@ -0,0 +1,125 @@
/* Copyright 2013-2014 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

#define STACK_TOP 0x2000

/* Load an immediate 64-bit value into a register */
#define LOAD_IMM64(r, e) \
lis r,(e)@highest; \
ori r,r,(e)@higher; \
rldicr r,r, 32, 31; \
oris r,r, (e)@h; \
ori r,r, (e)@l;

.section ".head","ax"

/*
* Microwatt currently enters in LE mode at 0x0, so we don't need to
* do any endian fix ups
*/
. = 0
.global _start
_start:
b boot_entry

.global boot_entry
boot_entry:
/* setup stack */
LOAD_IMM64(%r1, STACK_TOP - 0x100)
LOAD_IMM64(%r12, main)
mtctr %r12
bctrl
attn // terminate on exit
b .

/* test illegal */
.global ill_test_1
ill_test_1:
li %r3, 1 // preload a failure
.long 0x0 // illegal will be skipped + 1 more
b 1f // skipped

li %r3, 1 // preload a failure
.long 0x0 // illegal will be skipped + 1 more
b 1f // skipped

li %r3, 0
blr
1:
li %r3, 1
blr

#define EXCEPTION(nr) \
.= nr ;\
b .

/* More exception stubs */
EXCEPTION(0x300)
EXCEPTION(0x380)
EXCEPTION(0x400)
EXCEPTION(0x480)
EXCEPTION(0x500)
EXCEPTION(0x600)

. = 0x700
mtsprg0 %r3
mtsprg1 %r4

// test for bit 44 being set for ILL
mfsrr1 %r3
li %r4, 1
sldi %r4, %r4, (63-44)
and. %r4, %r4, %r3
li %r4, 8 // PASS so skip 2 instructions
bne 1f
li %r4, 4 // FAIL so only skip 1 instruction. Return will catch
1:
mfsrr0 %r3
add %r3, %r3, %r4 // skip some instructions
mtsrr0 %r3

mfsprg0 %r3
mfsprg1 %r4
rfid

EXCEPTION(0x800)
EXCEPTION(0x900)
EXCEPTION(0x980)
EXCEPTION(0xa00)
EXCEPTION(0xb00)
EXCEPTION(0xc00)
EXCEPTION(0xd00)
EXCEPTION(0xe00)
EXCEPTION(0xe20)
EXCEPTION(0xe40)
EXCEPTION(0xe60)
EXCEPTION(0xe80)
EXCEPTION(0xf00)
EXCEPTION(0xf20)
EXCEPTION(0xf40)
EXCEPTION(0xf60)
EXCEPTION(0xf80)
#if 0
EXCEPTION(0x1000)
EXCEPTION(0x1100)
EXCEPTION(0x1200)
EXCEPTION(0x1300)
EXCEPTION(0x1400)
EXCEPTION(0x1500)
EXCEPTION(0x1600)
#endif


@ -0,0 +1,37 @@
#include <unistd.h>
#include <string.h>
#include <stdint.h>
#include <stdbool.h>

#include "console.h"

#define TEST "Test "
#define PASS "PASS\r\n"
#define FAIL "FAIL\r\n"

extern int ill_test_1(void);

// i < 100
void print_test_number(int i)
{
putstr(TEST, strlen(TEST));
putchar(48 + i/10);
putchar(48 + i%10);
putstr(":", 1);
}

int main(void)
{
int fail = 0;

potato_uart_init();

print_test_number(1);
if (ill_test_1() != 0) {
fail = 1;
putstr(FAIL, strlen(FAIL));
} else
putstr(PASS, strlen(PASS));

return fail;
}

@ -0,0 +1,13 @@
SECTIONS
{
_start = .;
. = 0;
.head : {
KEEP(*(.head))
}
. = 0x1000;
.text : { *(.text) }
. = 0x2000;
.data : { *(.data) }
.bss : { *(.bss) }
}

@ -0,0 +1,3 @@
TEST=sc

include ../Makefile.test

@ -0,0 +1,111 @@
/* Copyright 2013-2014 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

#define STACK_TOP 0x2000

/* Load an immediate 64-bit value into a register */
#define LOAD_IMM64(r, e) \
lis r,(e)@highest; \
ori r,r,(e)@higher; \
rldicr r,r, 32, 31; \
oris r,r, (e)@h; \
ori r,r, (e)@l;

.section ".head","ax"

/*
* Microwatt currently enters in LE mode at 0x0, so we don't need to
* do any endian fix ups
*/
. = 0
.global _start
_start:
b boot_entry

.global boot_entry
boot_entry:
/* setup stack */
LOAD_IMM64(%r1, STACK_TOP - 0x100)
LOAD_IMM64(%r12, main)
mtctr %r12
bctrl
attn // terminate on exit
b .

/* test sc */
.global sc_test_1
sc_test_1:
li %r3, 1 // preload a failure
sc
b 1f // skipped
b 1f // skipped
b 2f // return here is good!
b 1f // shouldn't hit here
2:
li %r3, 0
blr
1:
li %r3, 1
blr

#define EXCEPTION(nr) \
.= nr ;\
b .

/* More exception stubs */
EXCEPTION(0x300)
EXCEPTION(0x380)
EXCEPTION(0x400)
EXCEPTION(0x480)
EXCEPTION(0x500)
EXCEPTION(0x600)
EXCEPTION(0x700)
EXCEPTION(0x800)
EXCEPTION(0x900)
EXCEPTION(0x980)
EXCEPTION(0xa00)
EXCEPTION(0xb00)

. = 0xc00
mtsprg0 %r3
mfsrr0 %r3
addi %r3, %r3, 8 // skip 2 instructions
mtsrr0 %r3
mfsprg0 %r3
rfid

EXCEPTION(0xd00)
EXCEPTION(0xe00)
EXCEPTION(0xe20)
EXCEPTION(0xe40)
EXCEPTION(0xe60)
EXCEPTION(0xe80)
EXCEPTION(0xf00)
EXCEPTION(0xf20)
EXCEPTION(0xf40)
EXCEPTION(0xf60)
EXCEPTION(0xf80)
#if 0
EXCEPTION(0x1000)
EXCEPTION(0x1100)
EXCEPTION(0x1200)
EXCEPTION(0x1300)
EXCEPTION(0x1400)
EXCEPTION(0x1500)
EXCEPTION(0x1600)
#endif


@ -0,0 +1,13 @@
SECTIONS
{
_start = .;
. = 0;
.head : {
KEEP(*(.head))
}
. = 0x1000;
.text : { *(.text) }
. = 0x2000;
.data : { *(.data) }
.bss : { *(.bss) }
}

@ -0,0 +1,37 @@
#include <unistd.h>
#include <string.h>
#include <stdint.h>
#include <stdbool.h>

#include "console.h"

#define TEST "Test "
#define PASS "PASS\r\n"
#define FAIL "FAIL\r\n"

extern int sc_test_1(void);

// i < 100
void print_test_number(int i)
{
putstr(TEST, strlen(TEST));
putchar(48 + i/10);
putchar(48 + i%10);
putstr(":", 1);
}

int main(void)
{
int fail = 0;

potato_uart_init();

print_test_number(1);
if (sc_test_1() != 0) {
fail = 1;
putstr(FAIL, strlen(FAIL));
} else
putstr(PASS, strlen(PASS));

return fail;
}

Binary file not shown.

@ -0,0 +1,3 @@
Test 01:PASS
Test 02:PASS
Test 03:PASS

Binary file not shown.

Binary file not shown.

@ -0,0 +1,14 @@
#!/bin/bash
#
# Script to update console related tests from source
#

for i in sc illegal decrementer ; do
cd $i
make
cd -
cp $i/$i.bin test_$i.bin
ln -s test_$i.bin main_ram.bin
../core_tb > /dev/null 2> test_$i.console_out
rm main_ram.bin
done
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