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authorStefan Roese <sr@denx.de>2010-04-15 16:07:28 +0200
committerWolfgang Denk <wd@denx.de>2010-04-21 23:42:38 +0200
commita47a12becf66f02a56da91c161e2edb625e9f20c (patch)
tree6efae7137d26d1e610c5fd56b7aaa3c043ad2b71 /post/lib_powerpc/load.c
parent254ab7bd464657600aba69d840406f9358f3e116 (diff)
downloadu-boot-linaro-stable-a47a12becf66f02a56da91c161e2edb625e9f20c.tar.gz
Move arch/ppc to arch/powerpc
As discussed on the list, move "arch/ppc" to "arch/powerpc" to better match the Linux directory structure. Please note that this patch also changes the "ppc" target in MAKEALL to "powerpc" to match this new infrastructure. But "ppc" is kept as an alias for now, to not break compatibility with scripts using this name. Signed-off-by: Stefan Roese <sr@denx.de> Acked-by: Wolfgang Denk <wd@denx.de> Acked-by: Detlev Zundel <dzu@denx.de> Acked-by: Kim Phillips <kim.phillips@freescale.com> Cc: Peter Tyser <ptyser@xes-inc.com> Cc: Anatolij Gustschin <agust@denx.de>
Diffstat (limited to 'post/lib_powerpc/load.c')
-rw-r--r--post/lib_powerpc/load.c256
1 files changed, 256 insertions, 0 deletions
diff --git a/post/lib_powerpc/load.c b/post/lib_powerpc/load.c
new file mode 100644
index 000000000..98d437318
--- /dev/null
+++ b/post/lib_powerpc/load.c
@@ -0,0 +1,256 @@
+/*
+ * (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
+ * Load instructions: lbz(x)(u), lhz(x)(u), lha(x)(u), lwz(x)(u)
+ *
+ * All operations are performed on a 16-byte array. The array
+ * is 4-byte aligned. The base register points to offset 8.
+ * The immediate offset (index register) ranges in [-8 ... +7].
+ * The test cases are composed so that they do not
+ * cause alignment exceptions.
+ * The test contains a pre-built table describing all test cases.
+ * The table entry contains:
+ * the instruction opcode, the array contents, the value of the index
+ * register and the expected value of the destination register.
+ * After executing the instruction, the test verifies the
+ * value of the destination register and the value of the base
+ * register (it must change for "load with update" instructions).
+ */
+
+#include <post.h>
+#include "cpu_asm.h"
+
+#if CONFIG_POST & CONFIG_SYS_POST_CPU
+
+extern void cpu_post_exec_22w (ulong *code, ulong *op1, ulong op2, ulong *op3);
+extern void cpu_post_exec_21w (ulong *code, ulong *op1, ulong *op2);
+
+static struct cpu_post_load_s
+{
+ ulong cmd;
+ uint width;
+ int update;
+ int index;
+ ulong offset;
+} cpu_post_load_table[] =
+{
+ {
+ OP_LWZ,
+ 4,
+ 0,
+ 0,
+ 4
+ },
+ {
+ OP_LHA,
+ 3,
+ 0,
+ 0,
+ 2
+ },
+ {
+ OP_LHZ,
+ 2,
+ 0,
+ 0,
+ 2
+ },
+ {
+ OP_LBZ,
+ 1,
+ 0,
+ 0,
+ 1
+ },
+ {
+ OP_LWZU,
+ 4,
+ 1,
+ 0,
+ 4
+ },
+ {
+ OP_LHAU,
+ 3,
+ 1,
+ 0,
+ 2
+ },
+ {
+ OP_LHZU,
+ 2,
+ 1,
+ 0,
+ 2
+ },
+ {
+ OP_LBZU,
+ 1,
+ 1,
+ 0,
+ 1
+ },
+ {
+ OP_LWZX,
+ 4,
+ 0,
+ 1,
+ 4
+ },
+ {
+ OP_LHAX,
+ 3,
+ 0,
+ 1,
+ 2
+ },
+ {
+ OP_LHZX,
+ 2,
+ 0,
+ 1,
+ 2
+ },
+ {
+ OP_LBZX,
+ 1,
+ 0,
+ 1,
+ 1
+ },
+ {
+ OP_LWZUX,
+ 4,
+ 1,
+ 1,
+ 4
+ },
+ {
+ OP_LHAUX,
+ 3,
+ 1,
+ 1,
+ 2
+ },
+ {
+ OP_LHZUX,
+ 2,
+ 1,
+ 1,
+ 2
+ },
+ {
+ OP_LBZUX,
+ 1,
+ 1,
+ 1,
+ 1
+ },
+};
+static unsigned int cpu_post_load_size =
+ sizeof (cpu_post_load_table) / sizeof (struct cpu_post_load_s);
+
+int cpu_post_test_load (void)
+{
+ int ret = 0;
+ unsigned int i;
+ int flag = disable_interrupts();
+
+ for (i = 0; i < cpu_post_load_size && ret == 0; i++)
+ {
+ struct cpu_post_load_s *test = cpu_post_load_table + i;
+ uchar data[16] =
+ { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 };
+ ulong base0 = (ulong) (data + 8);
+ ulong base = base0;
+ ulong value;
+
+ if (test->index)
+ {
+ ulong code[] =
+ {
+ ASM_12(test->cmd, 5, 3, 4),
+ ASM_BLR,
+ };
+
+ cpu_post_exec_22w (code, &base, test->offset, &value);
+ }
+ else
+ {
+ ulong code[] =
+ {
+ ASM_11I(test->cmd, 4, 3, test->offset),
+ ASM_BLR,
+ };
+
+ cpu_post_exec_21w (code, &base, &value);
+ }
+
+ if (ret == 0)
+ {
+ if (test->update)
+ ret = base == base0 + test->offset ? 0 : -1;
+ else
+ ret = base == base0 ? 0 : -1;
+ }
+
+ if (ret == 0)
+ {
+ switch (test->width)
+ {
+ case 1:
+ ret = *(uchar *)(base0 + test->offset) == value ?
+ 0 : -1;
+ break;
+ case 2:
+ ret = *(ushort *)(base0 + test->offset) == value ?
+ 0 : -1;
+ break;
+ case 3:
+ ret = *(short *)(base0 + test->offset) == value ?
+ 0 : -1;
+ break;
+ case 4:
+ ret = *(ulong *)(base0 + test->offset) == value ?
+ 0 : -1;
+ break;
+ }
+ }
+
+ if (ret != 0)
+ {
+ post_log ("Error at load test %d !\n", i);
+ }
+ }
+
+ if (flag)
+ enable_interrupts();
+
+ return ret;
+}
+
+#endif