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Diffstat (limited to 'post/lib_ppc/store.c')
| -rw-r--r-- | post/lib_ppc/store.c | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/post/lib_ppc/store.c b/post/lib_ppc/store.c new file mode 100644 index 000000000..f495bf2aa --- /dev/null +++ b/post/lib_ppc/store.c @@ -0,0 +1,235 @@ +/* + * (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 + * Store instructions: stb(x)(u), sth(x)(u), stw(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 value of the index register and + * the value of the source register. After executing the + * instruction, the test verifies the contents of the array + * and the value of the base register (it must change for "store + * with update" instructions). + */ + +#ifdef CONFIG_POST + +#include <post.h> +#include "cpu_asm.h" + +#if CONFIG_POST & CFG_POST_CPU + +extern void cpu_post_exec_12w (ulong *code, ulong *op1, ulong op2, ulong op3); +extern void cpu_post_exec_11w (ulong *code, ulong *op1, ulong op2); + +static struct cpu_post_store_s +{ + ulong cmd; + uint width; + int update; + int index; + ulong offset; + ulong value; +} cpu_post_store_table[] = +{ + { + OP_STW, + 4, + 0, + 0, + -4, + 0xff00ff00 + }, + { + OP_STH, + 2, + 0, + 0, + -2, + 0xff00 + }, + { + OP_STB, + 1, + 0, + 0, + -1, + 0xff + }, + { + OP_STWU, + 4, + 1, + 0, + -4, + 0xff00ff00 + }, + { + OP_STHU, + 2, + 1, + 0, + -2, + 0xff00 + }, + { + OP_STBU, + 1, + 1, + 0, + -1, + 0xff + }, + { + OP_STWX, + 4, + 0, + 1, + -4, + 0xff00ff00 + }, + { + OP_STHX, + 2, + 0, + 1, + -2, + 0xff00 + }, + { + OP_STBX, + 1, + 0, + 1, + -1, + 0xff + }, + { + OP_STWUX, + 4, + 1, + 1, + -4, + 0xff00ff00 + }, + { + OP_STHUX, + 2, + 1, + 1, + -2, + 0xff00 + }, + { + OP_STBUX, + 1, + 1, + 1, + -1, + 0xff + }, +}; +static unsigned int cpu_post_store_size = + sizeof (cpu_post_store_table) / sizeof (struct cpu_post_store_s); + +int cpu_post_test_store (void) +{ + int ret = 0; + unsigned int i; + + for (i = 0; i < cpu_post_store_size && ret == 0; i++) + { + struct cpu_post_store_s *test = cpu_post_store_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; + + if (test->index) + { + ulong code[] = + { + ASM_12(test->cmd, 5, 3, 4), + ASM_BLR, + }; + + cpu_post_exec_12w (code, &base, test->offset, test->value); + } + else + { + ulong code[] = + { + ASM_11I(test->cmd, 4, 3, test->offset), + ASM_BLR, + }; + + cpu_post_exec_11w (code, &base, test->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) == test->value ? + 0 : -1; + break; + case 2: + ret = *(ushort *)(base0 + test->offset) == test->value ? + 0 : -1; + break; + case 4: + ret = *(ulong *)(base0 + test->offset) == test->value ? + 0 : -1; + break; + } + } + + if (ret != 0) + { + post_log ("Error at store test %d !\n", i); + } + } + + return ret; +} + +#endif +#endif |