diff options
Diffstat (limited to 'post/lib_ppc/threei.c')
-rw-r--r-- | post/lib_ppc/threei.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/post/lib_ppc/threei.c b/post/lib_ppc/threei.c new file mode 100644 index 00000000000..79f01789c00 --- /dev/null +++ b/post/lib_ppc/threei.c @@ -0,0 +1,137 @@ +/* + * (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 + * Ternary instructions instr rA,rS,UIMM + * + * Logic instructions: ori, oris, xori, xoris + * + * 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_threei_s +{ + ulong cmd; + ulong op1; + ushort op2; + ulong res; +} cpu_post_threei_table[] = +{ + { + OP_ORI, + 0x80000000, + 0xffff, + 0x8000ffff + }, + { + OP_ORIS, + 0x00008000, + 0xffff, + 0xffff8000 + }, + { + OP_XORI, + 0x8000ffff, + 0xffff, + 0x80000000 + }, + { + OP_XORIS, + 0x00008000, + 0xffff, + 0xffff8000 + }, +}; +static unsigned int cpu_post_threei_size = + sizeof (cpu_post_threei_table) / sizeof (struct cpu_post_threei_s); + +int cpu_post_test_threei (void) +{ + int ret = 0; + unsigned int i, reg; + int flag = disable_interrupts(); + + for (i = 0; i < cpu_post_threei_size && ret == 0; i++) + { + struct cpu_post_threei_s *test = cpu_post_threei_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_11IX(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, + }; + ulong res; + ulong cr; + + 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 threei test %d !\n", i); + } + } + } + + if (flag) + enable_interrupts(); + + return ret; +} + +#endif +#endif |