--- /dev/null
+/*
+ * (C) Copyright 2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+
+/*
+ * CPU test
+ * Condition register istructions: mtcr, mfcr, mcrxr,
+ * crand, crandc, cror, crorc, crxor,
+ * crnand, crnor, creqv, mcrf
+ *
+ * The mtcrf/mfcr instructions is tested by loading different
+ * values into the condition register (mtcrf), moving its value
+ * to a general-purpose register (mfcr) and comparing this value
+ * with the expected one.
+ * The mcrxr instruction is tested by loading a fixed value
+ * into the XER register (mtspr), moving XER value to the
+ * condition register (mcrxr), moving it to a general-purpose
+ * register (mfcr) and comparing the value of this register with
+ * the expected one.
+ * The rest of instructions is tested by loading a fixed
+ * value into the condition register (mtcrf), executing each
+ * instruction several times to modify all 4-bit condition
+ * fields, moving the value of the conditional register to a
+ * general-purpose register (mfcr) and comparing it with the
+ * expected one.
+ */
+
+#include <post.h>
+#include "cpu_asm.h"
+
+#if CONFIG_POST & CONFIG_SYS_POST_CPU
+
+extern void cpu_post_exec_11 (ulong *code, ulong *res, ulong op1);
+extern void cpu_post_exec_21x (ulong *code, ulong *op1, ulong *op2, ulong op3);
+
+static ulong cpu_post_cr_table1[] =
+{
+ 0xaaaaaaaa,
+ 0x55555555,
+};
+static unsigned int cpu_post_cr_size1 = ARRAY_SIZE(cpu_post_cr_table1);
+
+static struct cpu_post_cr_s2 {
+ ulong xer;
+ ulong cr;
+} cpu_post_cr_table2[] =
+{
+ {
+ 0xa0000000,
+ 1
+ },
+ {
+ 0x40000000,
+ 5
+ },
+};
+static unsigned int cpu_post_cr_size2 = ARRAY_SIZE(cpu_post_cr_table2);
+
+static struct cpu_post_cr_s3 {
+ ulong cr;
+ ulong cs;
+ ulong cd;
+ ulong res;
+} cpu_post_cr_table3[] =
+{
+ {
+ 0x01234567,
+ 0,
+ 4,
+ 0x01230567
+ },
+ {
+ 0x01234567,
+ 7,
+ 0,
+ 0x71234567
+ },
+};
+static unsigned int cpu_post_cr_size3 = ARRAY_SIZE(cpu_post_cr_table3);
+
+static struct cpu_post_cr_s4 {
+ ulong cmd;
+ ulong cr;
+ ulong op1;
+ ulong op2;
+ ulong op3;
+ ulong res;
+} cpu_post_cr_table4[] =
+{
+ {
+ OP_CRAND,
+ 0x0000ffff,
+ 0,
+ 16,
+ 0,
+ 0x0000ffff
+ },
+ {
+ OP_CRAND,
+ 0x0000ffff,
+ 16,
+ 17,
+ 0,
+ 0x8000ffff
+ },
+ {
+ OP_CRANDC,
+ 0x0000ffff,
+ 0,
+ 16,
+ 0,
+ 0x0000ffff
+ },
+ {
+ OP_CRANDC,
+ 0x0000ffff,
+ 16,
+ 0,
+ 0,
+ 0x8000ffff
+ },
+ {
+ OP_CROR,
+ 0x0000ffff,
+ 0,
+ 16,
+ 0,
+ 0x8000ffff
+ },
+ {
+ OP_CROR,
+ 0x0000ffff,
+ 0,
+ 1,
+ 0,
+ 0x0000ffff
+ },
+ {
+ OP_CRORC,
+ 0x0000ffff,
+ 0,
+ 16,
+ 0,
+ 0x0000ffff
+ },
+ {
+ OP_CRORC,
+ 0x0000ffff,
+ 0,
+ 0,
+ 0,
+ 0x8000ffff
+ },
+ {
+ OP_CRXOR,
+ 0x0000ffff,
+ 0,
+ 0,
+ 0,
+ 0x0000ffff
+ },
+ {
+ OP_CRXOR,
+ 0x0000ffff,
+ 0,
+ 16,
+ 0,
+ 0x8000ffff
+ },
+ {
+ OP_CRNAND,
+ 0x0000ffff,
+ 0,
+ 16,
+ 0,
+ 0x8000ffff
+ },
+ {
+ OP_CRNAND,
+ 0x0000ffff,
+ 16,
+ 17,
+ 0,
+ 0x0000ffff
+ },
+ {
+ OP_CRNOR,
+ 0x0000ffff,
+ 0,
+ 16,
+ 0,
+ 0x0000ffff
+ },
+ {
+ OP_CRNOR,
+ 0x0000ffff,
+ 0,
+ 1,
+ 0,
+ 0x8000ffff
+ },
+ {
+ OP_CREQV,
+ 0x0000ffff,
+ 0,
+ 0,
+ 0,
+ 0x8000ffff
+ },
+ {
+ OP_CREQV,
+ 0x0000ffff,
+ 0,
+ 16,
+ 0,
+ 0x0000ffff
+ },
+};
+static unsigned int cpu_post_cr_size4 = ARRAY_SIZE(cpu_post_cr_table4);
+
+int cpu_post_test_cr (void)
+{
+ int ret = 0;
+ unsigned int i;
+ unsigned long cr_sav;
+ int flag = disable_interrupts();
+
+ asm ( "mfcr %0" : "=r" (cr_sav) : );
+
+ for (i = 0; i < cpu_post_cr_size1 && ret == 0; i++)
+ {
+ ulong cr = cpu_post_cr_table1[i];
+ ulong res;
+
+ unsigned long code[] =
+ {
+ ASM_MTCR(3),
+ ASM_MFCR(3),
+ ASM_BLR,
+ };
+
+ cpu_post_exec_11 (code, &res, cr);
+
+ ret = res == cr ? 0 : -1;
+
+ if (ret != 0)
+ {
+ post_log ("Error at cr1 test %d !\n", i);
+ }
+ }
+
+ for (i = 0; i < cpu_post_cr_size2 && ret == 0; i++)
+ {
+ struct cpu_post_cr_s2 *test = cpu_post_cr_table2 + i;
+ ulong res;
+ ulong xer;
+
+ unsigned long code[] =
+ {
+ ASM_MTXER(3),
+ ASM_MCRXR(test->cr),
+ ASM_MFCR(3),
+ ASM_MFXER(4),
+ ASM_BLR,
+ };
+
+ cpu_post_exec_21x (code, &res, &xer, test->xer);
+
+ ret = xer == 0 && ((res << (4 * test->cr)) & 0xe0000000) == test->xer ?
+ 0 : -1;
+
+ if (ret != 0)
+ {
+ post_log ("Error at cr2 test %d !\n", i);
+ }
+ }
+
+ for (i = 0; i < cpu_post_cr_size3 && ret == 0; i++)
+ {
+ struct cpu_post_cr_s3 *test = cpu_post_cr_table3 + i;
+ ulong res;
+
+ unsigned long code[] =
+ {
+ ASM_MTCR(3),
+ ASM_MCRF(test->cd, test->cs),
+ ASM_MFCR(3),
+ ASM_BLR,
+ };
+
+ cpu_post_exec_11 (code, &res, test->cr);
+
+ ret = res == test->res ? 0 : -1;
+
+ if (ret != 0)
+ {
+ post_log ("Error at cr3 test %d !\n", i);
+ }
+ }
+
+ for (i = 0; i < cpu_post_cr_size4 && ret == 0; i++)
+ {
+ struct cpu_post_cr_s4 *test = cpu_post_cr_table4 + i;
+ ulong res;
+
+ unsigned long code[] =
+ {
+ ASM_MTCR(3),
+ ASM_12F(test->cmd, test->op3, test->op1, test->op2),
+ ASM_MFCR(3),
+ ASM_BLR,
+ };
+
+ cpu_post_exec_11 (code, &res, test->cr);
+
+ ret = res == test->res ? 0 : -1;
+
+ if (ret != 0)
+ {
+ post_log ("Error at cr4 test %d !\n", i);
+ }
+ }
+
+ asm ( "mtcr %0" : : "r" (cr_sav));
+
+ if (flag)
+ enable_interrupts();
+
+ return ret;
+}
+
+#endif
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