1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/kernel.h>
3 #include <linux/string.h>
4 #include <asm/lowcore.h>
5 #include <asm/setup.h>
6 #include <asm/sclp.h>
7 #include "boot.h"
8
9 const char hex_asc[] = "0123456789abcdef";
10
11 #define add_val_as_hex(dst, val) \
12 __add_val_as_hex(dst, (const unsigned char *)&val, sizeof(val))
13
__add_val_as_hex(char * dst,const unsigned char * src,size_t count)14 static char *__add_val_as_hex(char *dst, const unsigned char *src, size_t count)
15 {
16 while (count--)
17 dst = hex_byte_pack(dst, *src++);
18 return dst;
19 }
20
add_str(char * dst,char * src)21 static char *add_str(char *dst, char *src)
22 {
23 strcpy(dst, src);
24 return dst + strlen(dst);
25 }
26
print_pgm_check_info(void)27 void print_pgm_check_info(void)
28 {
29 struct psw_bits *psw = &psw_bits(S390_lowcore.psw_save_area);
30 unsigned short ilc = S390_lowcore.pgm_ilc >> 1;
31 char buf[256];
32 int row, col;
33 char *p;
34
35 add_str(buf, "Linux version ");
36 strlcat(buf, kernel_version, sizeof(buf) - 1);
37 strlcat(buf, "\n", sizeof(buf));
38 sclp_early_printk(buf);
39
40 p = add_str(buf, "Kernel fault: interruption code ");
41 p = add_val_as_hex(buf + strlen(buf), S390_lowcore.pgm_code);
42 p = add_str(p, " ilc:");
43 *p++ = hex_asc_lo(ilc);
44 add_str(p, "\n");
45 sclp_early_printk(buf);
46
47 if (kaslr_enabled) {
48 p = add_str(buf, "Kernel random base: ");
49 p = add_val_as_hex(p, __kaslr_offset);
50 add_str(p, "\n");
51 sclp_early_printk(buf);
52 }
53
54 p = add_str(buf, "PSW : ");
55 p = add_val_as_hex(p, S390_lowcore.psw_save_area.mask);
56 p = add_str(p, " ");
57 p = add_val_as_hex(p, S390_lowcore.psw_save_area.addr);
58 add_str(p, "\n");
59 sclp_early_printk(buf);
60
61 p = add_str(buf, " R:");
62 *p++ = hex_asc_lo(psw->per);
63 p = add_str(p, " T:");
64 *p++ = hex_asc_lo(psw->dat);
65 p = add_str(p, " IO:");
66 *p++ = hex_asc_lo(psw->io);
67 p = add_str(p, " EX:");
68 *p++ = hex_asc_lo(psw->ext);
69 p = add_str(p, " Key:");
70 *p++ = hex_asc_lo(psw->key);
71 p = add_str(p, " M:");
72 *p++ = hex_asc_lo(psw->mcheck);
73 p = add_str(p, " W:");
74 *p++ = hex_asc_lo(psw->wait);
75 p = add_str(p, " P:");
76 *p++ = hex_asc_lo(psw->pstate);
77 p = add_str(p, " AS:");
78 *p++ = hex_asc_lo(psw->as);
79 p = add_str(p, " CC:");
80 *p++ = hex_asc_lo(psw->cc);
81 p = add_str(p, " PM:");
82 *p++ = hex_asc_lo(psw->pm);
83 p = add_str(p, " RI:");
84 *p++ = hex_asc_lo(psw->ri);
85 p = add_str(p, " EA:");
86 *p++ = hex_asc_lo(psw->eaba);
87 add_str(p, "\n");
88 sclp_early_printk(buf);
89
90 for (row = 0; row < 4; row++) {
91 p = add_str(buf, row == 0 ? "GPRS:" : " ");
92 for (col = 0; col < 4; col++) {
93 p = add_str(p, " ");
94 p = add_val_as_hex(p, S390_lowcore.gpregs_save_area[row * 4 + col]);
95 }
96 add_str(p, "\n");
97 sclp_early_printk(buf);
98 }
99 }
100