tests/pmu: Add load/store completed, instruction count and cycle count tests

Signed-off-by: Iago Caran Aquino <iago.caran@gmail.com>

tests/pmu/Makefile

@@ -0,0 +1,3 @@
+TEST=pmu
+
+include ../Makefile.test

tests/pmu/head.S

@@ -0,0 +1,46 @@
+/* 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 0x4000
+
+/* 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 .

tests/pmu/pmu.c

@@ -0,0 +1,173 @@
+#include <stdint.h>
+#include <stdbool.h>
+
+#include "console.h"
+
+
+#define asm	__asm__ volatile
+
+#define MMCR0 	795 
+#define MMCR1 	798
+#define MMCR2 	785
+#define MMCRA 	786
+#define PMC1 	771
+#define PMC2 	772
+#define PMC3 	773
+#define PMC4 	774
+#define PMC5 	775
+#define PMC6 	776
+
+#define MMCR0_FC    0x80000000 // Freeze Counters
+#define PMC1SEL_FC  0xFC000000 // Load Completed
+#define PMC2SEL_F0  0x00F00000 // Store Completed
+
+#define TEST "Test "
+#define PASS "PASS\n"
+#define FAIL "FAIL\n"
+
+static inline unsigned long mfspr(int sprnum)
+{
+	unsigned long val;
+
+	asm("mfspr %0,%1" : "=r" ((unsigned long) val) : "i" (sprnum));
+	return val;
+}
+
+static inline void mtspr(int sprnum, unsigned long val)
+{
+	asm("mtspr %0,%1" : : "i" (sprnum), "r" ((unsigned long) val));
+}
+
+void print_test_number(int i)
+{
+	puts(TEST);
+	putchar(48 + i/10);
+	putchar(48 + i%10);
+	putchar(':');
+}
+
+void reset_pmu() {
+    mtspr(MMCR0, MMCR0_FC);
+    mtspr(MMCR1, 0);
+	mtspr(PMC1, 0);
+	mtspr(PMC2, 0);
+	mtspr(PMC3, 0);
+	mtspr(PMC4, 0);
+	mtspr(PMC5, 0);
+	mtspr(PMC6, 0);
+}
+
+/*
+	Sets PMC1 to count finished load instructions
+	Runs 50 load instructions
+	Expects PMC1 to be 50 at the end
+*/
+int test_load_complete() 
+{
+    reset_pmu();
+    unsigned long volatile b = 0;
+    mtspr(MMCR1, PMC1SEL_FC);
+    mtspr(MMCR0, 0);
+    
+	for(int i = 0; i < 50; i++)
+		++b;
+
+    mtspr(MMCR0, MMCR0_FC);
+    
+    return mfspr(PMC1) == 50;
+}
+
+/*
+	Sets PMC2 to count finished store instructions
+	Runs 50 store instructions
+	Expects PMC2 to be 50 at the end
+*/
+int test_store_complete()
+{
+    reset_pmu();
+    unsigned long volatile b = 0;
+    mtspr(MMCR1, PMC2SEL_F0);
+    mtspr(MMCR0, 0);
+    
+	for(int i = 0; i < 50; i++)
+		++b;
+
+    mtspr(MMCR0, MMCR0_FC);
+    
+    return mfspr(PMC2) == 50;
+}
+
+/*
+	Allow PMC5 to count finished instructions
+	Runs a loop 50 times
+	Expects PMC5 to be more than zero at the end
+*/
+int test_instruction_complete()
+{
+    reset_pmu();
+    unsigned long volatile b = 0;
+    mtspr(MMCR0, 0);
+    
+	for(int i = 0; i < 50; i++)
+		++b;
+
+    mtspr(MMCR0, MMCR0_FC);
+    
+    return mfspr(PMC5) > 0;
+}
+
+/*
+	Allow PMC6 to count cycles
+	Runs a loop 50 times
+	Expects PMC6 to be more than zero at the end
+*/
+int test_count_cycles()
+{
+    reset_pmu();
+    unsigned long volatile b = 0;
+    mtspr(MMCR0, 0);
+    
+	for(int i = 0; i < 50; i++)
+		++b;
+
+    mtspr(MMCR0, MMCR0_FC);
+    
+    return mfspr(PMC6) > 0;
+}
+
+int main(void)
+{
+    int fail = 0;
+
+    console_init();
+
+    print_test_number(1);
+	if (test_load_complete() != 1) {
+		fail = 1;
+		puts(FAIL);
+	} else
+		puts(PASS);
+
+	print_test_number(2);
+	if (test_store_complete() != 1) {
+		fail = 1;
+		puts(FAIL);
+	} else
+		puts(PASS);
+
+	print_test_number(3);
+	if (test_instruction_complete() == 0) {
+		fail = 1;
+		puts(FAIL);
+	} else
+		puts(PASS);
+    
+	print_test_number(4);
+	if (test_count_cycles() == 0) {
+		fail = 1;
+		puts(FAIL);
+	} else
+		puts(PASS);
+
+    return fail;
+}

tests/pmu/powerpc.lds

@@ -0,0 +1,27 @@
+SECTIONS
+{
+	. = 0;
+	_start = .;
+	.head : {
+		KEEP(*(.head))
+	}
+	. = ALIGN(0x1000);
+	.text : { *(.text) *(.text.*) *(.rodata) *(.rodata.*) }
+	. = ALIGN(0x1000);
+	.data : { *(.data) *(.data.*) *(.got) *(.toc) }
+	. = ALIGN(0x80);
+	__bss_start = .;
+	.bss : {
+		*(.dynsbss)
+		*(.sbss)
+		*(.scommon)
+		*(.dynbss)
+		*(.bss)
+		*(.common)
+		*(.bss.*)
+	}
+	. = ALIGN(0x80);
+	__bss_end = .;
+	. = . + 0x4000;
+	__stack_top = .;
+}

tests/test_pmu.console_out

@@ -0,0 +1,4 @@
+Test 01:PASS
+Test 02:PASS
+Test 03:PASS
+Test 04:PASS

tests/update_console_tests

@@ -3,7 +3,7 @@
 # Script to update console related tests from source
 #
 
-for i in sc illegal decrementer xics privileged mmu misc modes reservation trace fpu spr_read ; do
+for i in sc illegal decrementer xics privileged mmu misc modes pmu reservation trace fpu spr_read ; do
     cd $i
     make
     cd -