1 // SPDX-License-Identifier: GPL-2.0 1
2
3 #include <linux/compat.h>
4 #include <linux/ptrace.h>
5 #include <asm/cio.h>
6 #include <asm/asm-offsets.h>
7 #include "boot.h"
8
9 #define CCW0(cmd, addr, cnt, flg) \
10 { .cmd_code = cmd, .cda = addr, .count
11
12 #define PSW_MASK_DISABLED (PSW_MASK_WAIT | PSW
13
14 struct ipl_lowcore {
15 psw_t32 ipl_psw;
16 struct ccw0 ccwpgm[2];
17 u8 fill[56];
18 struct ccw0 ccwpgmcc[20];
19 u8 pad_0xf0[0x01a0-0x00f0
20 psw_t restart_psw;
21 psw_t external_new_psw;
22 psw_t svc_new_psw;
23 psw_t program_new_psw;
24 psw_t mcck_new_psw;
25 psw_t io_new_psw;
26 };
27
28 /*
29 * Initial lowcore for IPL: the first 24 bytes
30 * addresses 0-23 (a PSW and two CCWs). Bytes
31 * The next 160 bytes are loaded to addresses
32 * the continuation of the CCW program started
33 * range 0x0f0-0x730 from the image to the ran
34 * memory. At the end of the channel program t
35 * loaded.
36 * Initial processing starts at 0x200 = iplsta
37 *
38 * The restart psw points to iplstart which al
39 * image into memory and starting it by a psw
40 * other default psw new locations contain a d
41 * the address indicates which psw was loaded.
42 *
43 * Note that the 'file' utility can detect s39
44 * that to succeed the two initial CCWs, and t
45 * be present.
46 */
47 static struct ipl_lowcore ipl_lowcore __used _
48 .ipl_psw = { .mask = PSW32_MASK_BASE,
49 .ccwpgm = {
50 [ 0] = CCW0(CCW_CMD_READ_IPL,
51 [ 1] = CCW0(CCW_CMD_READ_IPL,
52 },
53 .fill = {
54 [ 0 ... 55] = 0x40,
55 },
56 .ccwpgmcc = {
57 [ 0] = CCW0(CCW_CMD_READ_IPL,
58 [ 1] = CCW0(CCW_CMD_READ_IPL,
59 [ 2] = CCW0(CCW_CMD_READ_IPL,
60 [ 3] = CCW0(CCW_CMD_READ_IPL,
61 [ 4] = CCW0(CCW_CMD_READ_IPL,
62 [ 5] = CCW0(CCW_CMD_READ_IPL,
63 [ 6] = CCW0(CCW_CMD_READ_IPL,
64 [ 7] = CCW0(CCW_CMD_READ_IPL,
65 [ 8] = CCW0(CCW_CMD_READ_IPL,
66 [ 9] = CCW0(CCW_CMD_READ_IPL,
67 [10] = CCW0(CCW_CMD_READ_IPL,
68 [11] = CCW0(CCW_CMD_READ_IPL,
69 [12] = CCW0(CCW_CMD_READ_IPL,
70 [13] = CCW0(CCW_CMD_READ_IPL,
71 [14] = CCW0(CCW_CMD_READ_IPL,
72 [15] = CCW0(CCW_CMD_READ_IPL,
73 [16] = CCW0(CCW_CMD_READ_IPL,
74 [17] = CCW0(CCW_CMD_READ_IPL,
75 [18] = CCW0(CCW_CMD_READ_IPL,
76 [19] = CCW0(CCW_CMD_READ_IPL,
77 },
78 .restart_psw = { .mask = 0, .addr
79 .external_new_psw = { .mask = PSW_MASK
80 .svc_new_psw = { .mask = PSW_MASK
81 .program_new_psw = { .mask = PSW_MASK
82 .mcck_new_psw = { .mask = PSW_MASK
83 .io_new_psw = { .mask = PSW_MASK
84 };
85
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