xref: /openbmc/u-boot/post/lib_powerpc/two.c (revision 83d290c56fab2d38cd1ab4c4cc7099559c1d5046)
1*83d290c5STom Rini // SPDX-License-Identifier: GPL-2.0+
2a47a12beSStefan Roese /*
3a47a12beSStefan Roese  * (C) Copyright 2002
4a47a12beSStefan Roese  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5a47a12beSStefan Roese  */
6a47a12beSStefan Roese 
7a47a12beSStefan Roese #include <common.h>
8a47a12beSStefan Roese 
9a47a12beSStefan Roese /*
10a47a12beSStefan Roese  * CPU test
11a47a12beSStefan Roese  * Binary instructions		instr rD,rA
12a47a12beSStefan Roese  *
13a47a12beSStefan Roese  * Logic instructions:		neg
14a47a12beSStefan Roese  * Arithmetic instructions:	addme, addze, subfme, subfze
15a47a12beSStefan Roese 
16a47a12beSStefan Roese  * The test contains a pre-built table of instructions, operands and
17a47a12beSStefan Roese  * expected results. For each table entry, the test will cyclically use
18a47a12beSStefan Roese  * different sets of operand registers and result registers.
19a47a12beSStefan Roese  */
20a47a12beSStefan Roese 
21a47a12beSStefan Roese #include <post.h>
22a47a12beSStefan Roese #include "cpu_asm.h"
23a47a12beSStefan Roese 
24a47a12beSStefan Roese #if CONFIG_POST & CONFIG_SYS_POST_CPU
25a47a12beSStefan Roese 
26a47a12beSStefan Roese extern void cpu_post_exec_21 (ulong *code, ulong *cr, ulong *res, ulong op1);
27a47a12beSStefan Roese extern ulong cpu_post_makecr (long v);
28a47a12beSStefan Roese 
29a47a12beSStefan Roese static struct cpu_post_two_s
30a47a12beSStefan Roese {
31a47a12beSStefan Roese     ulong cmd;
32a47a12beSStefan Roese     ulong op;
33a47a12beSStefan Roese     ulong res;
34a47a12beSStefan Roese } cpu_post_two_table[] =
35a47a12beSStefan Roese {
36a47a12beSStefan Roese     {
37a47a12beSStefan Roese 	OP_NEG,
38a47a12beSStefan Roese 	3,
39a47a12beSStefan Roese 	-3
40a47a12beSStefan Roese     },
41a47a12beSStefan Roese     {
42a47a12beSStefan Roese 	OP_NEG,
43a47a12beSStefan Roese 	5,
44a47a12beSStefan Roese 	-5
45a47a12beSStefan Roese     },
46a47a12beSStefan Roese     {
47a47a12beSStefan Roese 	OP_ADDME,
48a47a12beSStefan Roese 	6,
49a47a12beSStefan Roese 	5
50a47a12beSStefan Roese     },
51a47a12beSStefan Roese     {
52a47a12beSStefan Roese 	OP_ADDZE,
53a47a12beSStefan Roese 	5,
54a47a12beSStefan Roese 	5
55a47a12beSStefan Roese     },
56a47a12beSStefan Roese     {
57a47a12beSStefan Roese 	OP_SUBFME,
58a47a12beSStefan Roese 	6,
59a47a12beSStefan Roese 	~6 - 1
60a47a12beSStefan Roese     },
61a47a12beSStefan Roese     {
62a47a12beSStefan Roese 	OP_SUBFZE,
63a47a12beSStefan Roese 	5,
64a47a12beSStefan Roese 	~5
65a47a12beSStefan Roese     },
66a47a12beSStefan Roese };
67d2397817SMike Frysinger static unsigned int cpu_post_two_size = ARRAY_SIZE(cpu_post_two_table);
68a47a12beSStefan Roese 
cpu_post_test_two(void)69a47a12beSStefan Roese int cpu_post_test_two (void)
70a47a12beSStefan Roese {
71a47a12beSStefan Roese     int ret = 0;
72a47a12beSStefan Roese     unsigned int i, reg;
73a47a12beSStefan Roese     int flag = disable_interrupts();
74a47a12beSStefan Roese 
75a47a12beSStefan Roese     for (i = 0; i < cpu_post_two_size && ret == 0; i++)
76a47a12beSStefan Roese     {
77a47a12beSStefan Roese 	struct cpu_post_two_s *test = cpu_post_two_table + i;
78a47a12beSStefan Roese 
79a47a12beSStefan Roese 	for (reg = 0; reg < 32 && ret == 0; reg++)
80a47a12beSStefan Roese 	{
81a47a12beSStefan Roese 	    unsigned int reg0 = (reg + 0) % 32;
82a47a12beSStefan Roese 	    unsigned int reg1 = (reg + 1) % 32;
83a47a12beSStefan Roese 	    unsigned int stk = reg < 16 ? 31 : 15;
84a47a12beSStefan Roese 	    unsigned long code[] =
85a47a12beSStefan Roese 	    {
86a47a12beSStefan Roese 		ASM_STW(stk, 1, -4),
87a47a12beSStefan Roese 		ASM_ADDI(stk, 1, -16),
88a47a12beSStefan Roese 		ASM_STW(3, stk, 8),
89a47a12beSStefan Roese 		ASM_STW(reg0, stk, 4),
90a47a12beSStefan Roese 		ASM_STW(reg1, stk, 0),
91a47a12beSStefan Roese 		ASM_LWZ(reg0, stk, 8),
92a47a12beSStefan Roese 		ASM_11(test->cmd, reg1, reg0),
93a47a12beSStefan Roese 		ASM_STW(reg1, stk, 8),
94a47a12beSStefan Roese 		ASM_LWZ(reg1, stk, 0),
95a47a12beSStefan Roese 		ASM_LWZ(reg0, stk, 4),
96a47a12beSStefan Roese 		ASM_LWZ(3, stk, 8),
97a47a12beSStefan Roese 		ASM_ADDI(1, stk, 16),
98a47a12beSStefan Roese 		ASM_LWZ(stk, 1, -4),
99a47a12beSStefan Roese 		ASM_BLR,
100a47a12beSStefan Roese 	    };
101a47a12beSStefan Roese 	    unsigned long codecr[] =
102a47a12beSStefan Roese 	    {
103a47a12beSStefan Roese 		ASM_STW(stk, 1, -4),
104a47a12beSStefan Roese 		ASM_ADDI(stk, 1, -16),
105a47a12beSStefan Roese 		ASM_STW(3, stk, 8),
106a47a12beSStefan Roese 		ASM_STW(reg0, stk, 4),
107a47a12beSStefan Roese 		ASM_STW(reg1, stk, 0),
108a47a12beSStefan Roese 		ASM_LWZ(reg0, stk, 8),
109a47a12beSStefan Roese 		ASM_11(test->cmd, reg1, reg0) | BIT_C,
110a47a12beSStefan Roese 		ASM_STW(reg1, stk, 8),
111a47a12beSStefan Roese 		ASM_LWZ(reg1, stk, 0),
112a47a12beSStefan Roese 		ASM_LWZ(reg0, stk, 4),
113a47a12beSStefan Roese 		ASM_LWZ(3, stk, 8),
114a47a12beSStefan Roese 		ASM_ADDI(1, stk, 16),
115a47a12beSStefan Roese 		ASM_LWZ(stk, 1, -4),
116a47a12beSStefan Roese 		ASM_BLR,
117a47a12beSStefan Roese 	    };
118a47a12beSStefan Roese 	    ulong res;
119a47a12beSStefan Roese 	    ulong cr;
120a47a12beSStefan Roese 
121a47a12beSStefan Roese 	    if (ret == 0)
122a47a12beSStefan Roese 	    {
123a47a12beSStefan Roese 		cr = 0;
124a47a12beSStefan Roese 		cpu_post_exec_21 (code, & cr, & res, test->op);
125a47a12beSStefan Roese 
126a47a12beSStefan Roese 		ret = res == test->res && cr == 0 ? 0 : -1;
127a47a12beSStefan Roese 
128a47a12beSStefan Roese 		if (ret != 0)
129a47a12beSStefan Roese 		{
130a47a12beSStefan Roese 		    post_log ("Error at two test %d !\n", i);
131a47a12beSStefan Roese 		}
132a47a12beSStefan Roese 	    }
133a47a12beSStefan Roese 
134a47a12beSStefan Roese 	    if (ret == 0)
135a47a12beSStefan Roese 	    {
136a47a12beSStefan Roese 		cpu_post_exec_21 (codecr, & cr, & res, test->op);
137a47a12beSStefan Roese 
138a47a12beSStefan Roese 		ret = res == test->res &&
139a47a12beSStefan Roese 		      (cr & 0xe0000000) == cpu_post_makecr (res) ? 0 : -1;
140a47a12beSStefan Roese 
141a47a12beSStefan Roese 		if (ret != 0)
142a47a12beSStefan Roese 		{
143a47a12beSStefan Roese 		    post_log ("Error at two test %d !\n", i);
144a47a12beSStefan Roese 		}
145a47a12beSStefan Roese 	    }
146a47a12beSStefan Roese 	}
147a47a12beSStefan Roese     }
148a47a12beSStefan Roese 
149a47a12beSStefan Roese     if (flag)
150a47a12beSStefan Roese 	enable_interrupts();
151a47a12beSStefan Roese 
152a47a12beSStefan Roese     return ret;
153a47a12beSStefan Roese }
154a47a12beSStefan Roese 
155a47a12beSStefan Roese #endif
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