]>
git.ipfire.org Git - people/ms/u-boot.git/blob - post/lib_powerpc/twox.c
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * SPDX-License-Identifier: GPL-2.0+
12 * Binary instructions instr rA,rS
14 * Logic instructions: cntlzw
15 * Arithmetic instructions: extsb, extsh
17 * The test contains a pre-built table of instructions, operands and
18 * expected results. For each table entry, the test will cyclically use
19 * different sets of operand registers and result registers.
25 #if CONFIG_POST & CONFIG_SYS_POST_CPU
27 extern void cpu_post_exec_21 (ulong
*code
, ulong
*cr
, ulong
*res
, ulong op1
);
28 extern ulong
cpu_post_makecr (long v
);
30 static struct cpu_post_twox_s
35 } cpu_post_twox_table
[] =
68 static unsigned int cpu_post_twox_size
= ARRAY_SIZE(cpu_post_twox_table
);
70 int cpu_post_test_twox (void)
74 int flag
= disable_interrupts();
76 for (i
= 0; i
< cpu_post_twox_size
&& ret
== 0; i
++)
78 struct cpu_post_twox_s
*test
= cpu_post_twox_table
+ i
;
80 for (reg
= 0; reg
< 32 && ret
== 0; reg
++)
82 unsigned int reg0
= (reg
+ 0) % 32;
83 unsigned int reg1
= (reg
+ 1) % 32;
84 unsigned int stk
= reg
< 16 ? 31 : 15;
85 unsigned long code
[] =
88 ASM_ADDI(stk
, 1, -16),
90 ASM_STW(reg0
, stk
, 4),
91 ASM_STW(reg1
, stk
, 0),
92 ASM_LWZ(reg0
, stk
, 8),
93 ASM_11X(test
->cmd
, reg1
, reg0
),
94 ASM_STW(reg1
, stk
, 8),
95 ASM_LWZ(reg1
, stk
, 0),
96 ASM_LWZ(reg0
, stk
, 4),
102 unsigned long codecr
[] =
105 ASM_ADDI(stk
, 1, -16),
107 ASM_STW(reg0
, stk
, 4),
108 ASM_STW(reg1
, stk
, 0),
109 ASM_LWZ(reg0
, stk
, 8),
110 ASM_11X(test
->cmd
, reg1
, reg0
) | BIT_C
,
111 ASM_STW(reg1
, stk
, 8),
112 ASM_LWZ(reg1
, stk
, 0),
113 ASM_LWZ(reg0
, stk
, 4),
115 ASM_ADDI(1, stk
, 16),
125 cpu_post_exec_21 (code
, & cr
, & res
, test
->op
);
127 ret
= res
== test
->res
&& cr
== 0 ? 0 : -1;
131 post_log ("Error at twox test %d !\n", i
);
137 cpu_post_exec_21 (codecr
, & cr
, & res
, test
->op
);
139 ret
= res
== test
->res
&&
140 (cr
& 0xe0000000) == cpu_post_makecr (res
) ? 0 : -1;
144 post_log ("Error at twox test %d !\n", i
);