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authorWolfgang Denk <wd@pollux.denx.de>2007-03-06 18:08:43 +0100
committerWolfgang Denk <wd@denx.de>2007-03-06 18:08:43 +0100
commitad5bb451ade552c44bef9119d907929ebc2c126f (patch)
treedf979d3c6385a161cd6df6b6f903ed7eaad31948 /post/lib_ppc/srawi.c
parenta5284efd125967675b2e9c6ef7b95832268ad360 (diff)
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Restructure POST directory to support of other CPUs, boards, etc.
Diffstat (limited to 'post/lib_ppc/srawi.c')
-rw-r--r--post/lib_ppc/srawi.c156
1 files changed, 156 insertions, 0 deletions
diff --git a/post/lib_ppc/srawi.c b/post/lib_ppc/srawi.c
new file mode 100644
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+++ b/post/lib_ppc/srawi.c
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+/*
+ * (C) Copyright 2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+
+/*
+ * CPU test
+ * Shift instructions: srawi
+ *
+ * The test contains a pre-built table of instructions, operands and
+ * expected results. For each table entry, the test will cyclically use
+ * different sets of operand registers and result registers.
+ */
+
+#ifdef CONFIG_POST
+
+#include <post.h>
+#include "cpu_asm.h"
+
+#if CONFIG_POST & CFG_POST_CPU
+
+extern void cpu_post_exec_21 (ulong *code, ulong *cr, ulong *res, ulong op);
+extern ulong cpu_post_makecr (long v);
+
+static struct cpu_post_srawi_s
+{
+ ulong cmd;
+ ulong op1;
+ uchar op2;
+ ulong res;
+} cpu_post_srawi_table[] =
+{
+ {
+ OP_SRAWI,
+ 0x8000,
+ 3,
+ 0x1000
+ },
+ {
+ OP_SRAWI,
+ 0x80000000,
+ 3,
+ 0xf0000000
+ },
+};
+static unsigned int cpu_post_srawi_size =
+ sizeof (cpu_post_srawi_table) / sizeof (struct cpu_post_srawi_s);
+
+int cpu_post_test_srawi (void)
+{
+ int ret = 0;
+ unsigned int i, reg;
+ int flag = disable_interrupts();
+
+ for (i = 0; i < cpu_post_srawi_size && ret == 0; i++)
+ {
+ struct cpu_post_srawi_s *test = cpu_post_srawi_table + i;
+
+ for (reg = 0; reg < 32 && ret == 0; reg++)
+ {
+ unsigned int reg0 = (reg + 0) % 32;
+ unsigned int reg1 = (reg + 1) % 32;
+ unsigned int stk = reg < 16 ? 31 : 15;
+ unsigned long code[] =
+ {
+ ASM_STW(stk, 1, -4),
+ ASM_ADDI(stk, 1, -16),
+ ASM_STW(3, stk, 8),
+ ASM_STW(reg0, stk, 4),
+ ASM_STW(reg1, stk, 0),
+ ASM_LWZ(reg0, stk, 8),
+ ASM_11S(test->cmd, reg1, reg0, test->op2),
+ ASM_STW(reg1, stk, 8),
+ ASM_LWZ(reg1, stk, 0),
+ ASM_LWZ(reg0, stk, 4),
+ ASM_LWZ(3, stk, 8),
+ ASM_ADDI(1, stk, 16),
+ ASM_LWZ(stk, 1, -4),
+ ASM_BLR,
+ };
+ unsigned long codecr[] =
+ {
+ ASM_STW(stk, 1, -4),
+ ASM_ADDI(stk, 1, -16),
+ ASM_STW(3, stk, 8),
+ ASM_STW(reg0, stk, 4),
+ ASM_STW(reg1, stk, 0),
+ ASM_LWZ(reg0, stk, 8),
+ ASM_11S(test->cmd, reg1, reg0, test->op2) | BIT_C,
+ ASM_STW(reg1, stk, 8),
+ ASM_LWZ(reg1, stk, 0),
+ ASM_LWZ(reg0, stk, 4),
+ ASM_LWZ(3, stk, 8),
+ ASM_ADDI(1, stk, 16),
+ ASM_LWZ(stk, 1, -4),
+ ASM_BLR,
+ };
+ ulong res;
+ ulong cr;
+
+ if (ret == 0)
+ {
+ cr = 0;
+ cpu_post_exec_21 (code, & cr, & res, test->op1);
+
+ ret = res == test->res && cr == 0 ? 0 : -1;
+
+ if (ret != 0)
+ {
+ post_log ("Error at srawi test %d !\n", i);
+ }
+ }
+
+ if (ret == 0)
+ {
+ cpu_post_exec_21 (codecr, & cr, & res, test->op1);
+
+ ret = res == test->res &&
+ (cr & 0xe0000000) == cpu_post_makecr (res) ? 0 : -1;
+
+ if (ret != 0)
+ {
+ post_log ("Error at srawi test %d !\n", i);
+ }
+ }
+ }
+ }
+
+ if (flag)
+ enable_interrupts();
+
+ return ret;
+}
+
+#endif
+#endif