1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* winfixup.S: Handle cases where user stack p
3 *
4 * Copyright (C) 1997, 2006 David S. Miller (d
5 */
6
7 #include <asm/asi.h>
8 #include <asm/head.h>
9 #include <asm/page.h>
10 #include <asm/ptrace.h>
11 #include <asm/processor.h>
12 #include <asm/spitfire.h>
13 #include <asm/thread_info.h>
14
15 .text
16
17 /* It used to be the case that these r
18 * handlers could run via the save and
19 * done by the trap entry and exit cod
20 * window spill/fill by hand, so that
21 */
22
23 .align 32
24 fill_fixup:
25 TRAP_LOAD_THREAD_REG(%g6, %g1)
26 rdpr %tstate, %g1
27 and %g1, TSTATE_CWP, %g1
28 or %g4, FAULT_CODE_WINFIXUP, %g4
29 stb %g4, [%g6 + TI_FAULT_CODE]
30 stx %g5, [%g6 + TI_FAULT_ADDR]
31 wrpr %g1, %cwp
32 ba,pt %xcc, etrap
33 rd %pc, %g7
34 call do_sparc64_fault
35 add %sp, PTREGS_OFF, %o0
36 ba,a,pt %xcc, rtrap
37
38 /* Be very careful about usage of the
39 * You cannot touch %g5 as that has th
40 */
41 spill_fixup:
42 spill_fixup_mna:
43 spill_fixup_dax:
44 TRAP_LOAD_THREAD_REG(%g6, %g1)
45 ldx [%g6 + TI_FLAGS], %g1
46 andcc %sp, 0x1, %g0
47 movne %icc, 0, %g1
48 andcc %g1, _TIF_32BIT, %g0
49 ldub [%g6 + TI_WSAVED], %g1
50 sll %g1, 3, %g3
51 add %g6, %g3, %g3
52 stx %sp, [%g3 + TI_RWIN_SPTRS]
53 sll %g1, 7, %g3
54 bne,pt %xcc, 1f
55 add %g6, %g3, %g3
56 stx %l0, [%g3 + TI_REG_WINDOW + 0x
57 stx %l1, [%g3 + TI_REG_WINDOW + 0x
58 stx %l2, [%g3 + TI_REG_WINDOW + 0x
59 stx %l3, [%g3 + TI_REG_WINDOW + 0x
60 stx %l4, [%g3 + TI_REG_WINDOW + 0x
61 stx %l5, [%g3 + TI_REG_WINDOW + 0x
62 stx %l6, [%g3 + TI_REG_WINDOW + 0x
63 stx %l7, [%g3 + TI_REG_WINDOW + 0x
64 stx %i0, [%g3 + TI_REG_WINDOW + 0x
65 stx %i1, [%g3 + TI_REG_WINDOW + 0x
66 stx %i2, [%g3 + TI_REG_WINDOW + 0x
67 stx %i3, [%g3 + TI_REG_WINDOW + 0x
68 stx %i4, [%g3 + TI_REG_WINDOW + 0x
69 stx %i5, [%g3 + TI_REG_WINDOW + 0x
70 stx %i6, [%g3 + TI_REG_WINDOW + 0x
71 ba,pt %xcc, 2f
72 stx %i7, [%g3 + TI_REG_WINDOW + 0x
73 1: stw %l0, [%g3 + TI_REG_WINDOW + 0x
74 stw %l1, [%g3 + TI_REG_WINDOW + 0x
75 stw %l2, [%g3 + TI_REG_WINDOW + 0x
76 stw %l3, [%g3 + TI_REG_WINDOW + 0x
77 stw %l4, [%g3 + TI_REG_WINDOW + 0x
78 stw %l5, [%g3 + TI_REG_WINDOW + 0x
79 stw %l6, [%g3 + TI_REG_WINDOW + 0x
80 stw %l7, [%g3 + TI_REG_WINDOW + 0x
81 stw %i0, [%g3 + TI_REG_WINDOW + 0x
82 stw %i1, [%g3 + TI_REG_WINDOW + 0x
83 stw %i2, [%g3 + TI_REG_WINDOW + 0x
84 stw %i3, [%g3 + TI_REG_WINDOW + 0x
85 stw %i4, [%g3 + TI_REG_WINDOW + 0x
86 stw %i5, [%g3 + TI_REG_WINDOW + 0x
87 stw %i6, [%g3 + TI_REG_WINDOW + 0x
88 stw %i7, [%g3 + TI_REG_WINDOW + 0x
89 2: add %g1, 1, %g1
90 stb %g1, [%g6 + TI_WSAVED]
91 rdpr %tstate, %g1
92 andcc %g1, TSTATE_PRIV, %g0
93 saved
94 be,pn %xcc, 1f
95 and %g1, TSTATE_CWP, %g1
96 retry
97 1: mov FAULT_CODE_WRITE | FAULT_CODE_
98 stb %g4, [%g6 + TI_FAULT_CODE]
99 stx %g5, [%g6 + TI_FAULT_ADDR]
100 wrpr %g1, %cwp
101 ba,pt %xcc, etrap
102 rd %pc, %g7
103 call do_sparc64_fault
104 add %sp, PTREGS_OFF, %o0
105 ba,a,pt %xcc, rtrap
106
107 winfix_mna:
108 andn %g3, 0x7f, %g3
109 add %g3, 0x78, %g3
110 wrpr %g3, %tnpc
111 done
112
113 fill_fixup_mna:
114 rdpr %tstate, %g1
115 and %g1, TSTATE_CWP, %g1
116 wrpr %g1, %cwp
117 ba,pt %xcc, etrap
118 rd %pc, %g7
119 sethi %hi(tlb_type), %g1
120 lduw [%g1 + %lo(tlb_type)], %g1
121 cmp %g1, 3
122 bne,pt %icc, 1f
123 add %sp, PTREGS_OFF, %o0
124 mov %l4, %o2
125 call sun4v_do_mna
126 mov %l5, %o1
127 ba,a,pt %xcc, rtrap
128 1: mov %l4, %o1
129 mov %l5, %o2
130 call mem_address_unaligned
131 nop
132 ba,a,pt %xcc, rtrap
133
134 winfix_dax:
135 andn %g3, 0x7f, %g3
136 add %g3, 0x74, %g3
137 wrpr %g3, %tnpc
138 done
139
140 fill_fixup_dax:
141 rdpr %tstate, %g1
142 and %g1, TSTATE_CWP, %g1
143 wrpr %g1, %cwp
144 ba,pt %xcc, etrap
145 rd %pc, %g7
146 sethi %hi(tlb_type), %g1
147 mov %l4, %o1
148 lduw [%g1 + %lo(tlb_type)], %g1
149 mov %l5, %o2
150 cmp %g1, 3
151 bne,pt %icc, 1f
152 add %sp, PTREGS_OFF, %o0
153 call sun4v_data_access_exception
154 nop
155 ba,a,pt %xcc, rtrap
156 nop
157 1: call spitfire_data_access_exception
158 nop
159 ba,a,pt %xcc, rtrap
160 nop
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