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1/* hvtramp.S: Hypervisor start-cpu trampoline code.
2 *
3 * Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net>
4 */
5
6#include <linux/init.h>
7
8#include <asm/thread_info.h>
9#include <asm/hypervisor.h>
10#include <asm/scratchpad.h>
11#include <asm/spitfire.h>
12#include <asm/hvtramp.h>
13#include <asm/pstate.h>
14#include <asm/ptrace.h>
15#include <asm/head.h>
16#include <asm/asi.h>
17#include <asm/pil.h>
18
19 __CPUINIT
20 .align 8
21 .globl hv_cpu_startup, hv_cpu_startup_end
22
23 /* This code executes directly out of the hypervisor
24 * with physical addressing (va==pa). %o0 contains
25 * our client argument which for Linux points to
26 * a descriptor data structure which defines the
27 * MMU entries we need to load up.
28 *
29 * After we set things up we enable the MMU and call
30 * into the kernel.
31 *
32 * First setup basic privileged cpu state.
33 */
34hv_cpu_startup:
35 SET_GL(0)
36 wrpr %g0, PIL_NORMAL_MAX, %pil
37 wrpr %g0, 0, %canrestore
38 wrpr %g0, 0, %otherwin
39 wrpr %g0, 6, %cansave
40 wrpr %g0, 6, %cleanwin
41 wrpr %g0, 0, %cwp
42 wrpr %g0, 0, %wstate
43 wrpr %g0, 0, %tl
44
45 sethi %hi(sparc64_ttable_tl0), %g1
46 wrpr %g1, %tba
47
48 mov %o0, %l0
49
50 lduw [%l0 + HVTRAMP_DESCR_CPU], %g1
51 mov SCRATCHPAD_CPUID, %g2
52 stxa %g1, [%g2] ASI_SCRATCHPAD
53
54 ldx [%l0 + HVTRAMP_DESCR_FAULT_INFO_VA], %g2
55 stxa %g2, [%g0] ASI_SCRATCHPAD
56
57 mov 0, %l1
58 lduw [%l0 + HVTRAMP_DESCR_NUM_MAPPINGS], %l2
59 add %l0, HVTRAMP_DESCR_MAPS, %l3
60
611: ldx [%l3 + HVTRAMP_MAPPING_VADDR], %o0
62 clr %o1
63 ldx [%l3 + HVTRAMP_MAPPING_TTE], %o2
64 mov HV_MMU_IMMU | HV_MMU_DMMU, %o3
65 mov HV_FAST_MMU_MAP_PERM_ADDR, %o5
66 ta HV_FAST_TRAP
67
68 brnz,pn %o0, 80f
69 nop
70
71 add %l1, 1, %l1
72 cmp %l1, %l2
73 blt,a,pt %xcc, 1b
74 add %l3, HVTRAMP_MAPPING_SIZE, %l3
75
76 ldx [%l0 + HVTRAMP_DESCR_FAULT_INFO_PA], %o0
77 mov HV_FAST_MMU_FAULT_AREA_CONF, %o5
78 ta HV_FAST_TRAP
79
80 brnz,pn %o0, 80f
81 nop
82
83 wrpr %g0, (PSTATE_PRIV | PSTATE_PEF), %pstate
84
85 ldx [%l0 + HVTRAMP_DESCR_THREAD_REG], %l6
86
87 mov 1, %o0
88 set 1f, %o1
89 mov HV_FAST_MMU_ENABLE, %o5
90 ta HV_FAST_TRAP
91
92 ba,pt %xcc, 80f
93 nop
94
951:
96 wr %g0, 0, %fprs
97 wr %g0, ASI_P, %asi
98
99 mov PRIMARY_CONTEXT, %g7
100 stxa %g0, [%g7] ASI_MMU
101 membar #Sync
102
103 mov SECONDARY_CONTEXT, %g7
104 stxa %g0, [%g7] ASI_MMU
105 membar #Sync
106
107 mov %l6, %g6
108 ldx [%g6 + TI_TASK], %g4
109
110 mov 1, %g5
111 sllx %g5, THREAD_SHIFT, %g5
112 sub %g5, (STACKFRAME_SZ + STACK_BIAS), %g5
113 add %g6, %g5, %sp
114 mov 0, %fp
115
116 call init_irqwork_curcpu
117 nop
118 call hard_smp_processor_id
119 nop
120
121 call sun4v_register_mondo_queues
122 nop
123
124 call init_cur_cpu_trap
125 mov %g6, %o0
126
127 wrpr %g0, (PSTATE_PRIV | PSTATE_PEF | PSTATE_IE), %pstate
128
129 call smp_callin
130 nop
131 call cpu_idle
132 mov 0, %o0
133 call cpu_panic
134 nop
135
13680: ba,pt %xcc, 80b
137 nop
138
139 .align 8
140hv_cpu_startup_end:
1/* SPDX-License-Identifier: GPL-2.0 */
2/* hvtramp.S: Hypervisor start-cpu trampoline code.
3 *
4 * Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net>
5 */
6
7
8#include <asm/thread_info.h>
9#include <asm/hypervisor.h>
10#include <asm/scratchpad.h>
11#include <asm/spitfire.h>
12#include <asm/hvtramp.h>
13#include <asm/pstate.h>
14#include <asm/ptrace.h>
15#include <asm/head.h>
16#include <asm/asi.h>
17#include <asm/pil.h>
18
19 .align 8
20 .globl hv_cpu_startup, hv_cpu_startup_end
21
22 /* This code executes directly out of the hypervisor
23 * with physical addressing (va==pa). %o0 contains
24 * our client argument which for Linux points to
25 * a descriptor data structure which defines the
26 * MMU entries we need to load up.
27 *
28 * After we set things up we enable the MMU and call
29 * into the kernel.
30 *
31 * First setup basic privileged cpu state.
32 */
33hv_cpu_startup:
34 SET_GL(0)
35 wrpr %g0, PIL_NORMAL_MAX, %pil
36 wrpr %g0, 0, %canrestore
37 wrpr %g0, 0, %otherwin
38 wrpr %g0, 6, %cansave
39 wrpr %g0, 6, %cleanwin
40 wrpr %g0, 0, %cwp
41 wrpr %g0, 0, %wstate
42 wrpr %g0, 0, %tl
43
44 sethi %hi(sparc64_ttable_tl0), %g1
45 wrpr %g1, %tba
46
47 mov %o0, %l0
48
49 lduw [%l0 + HVTRAMP_DESCR_CPU], %g1
50 mov SCRATCHPAD_CPUID, %g2
51 stxa %g1, [%g2] ASI_SCRATCHPAD
52
53 ldx [%l0 + HVTRAMP_DESCR_FAULT_INFO_VA], %g2
54 stxa %g2, [%g0] ASI_SCRATCHPAD
55
56 mov 0, %l1
57 lduw [%l0 + HVTRAMP_DESCR_NUM_MAPPINGS], %l2
58 add %l0, HVTRAMP_DESCR_MAPS, %l3
59
601: ldx [%l3 + HVTRAMP_MAPPING_VADDR], %o0
61 clr %o1
62 ldx [%l3 + HVTRAMP_MAPPING_TTE], %o2
63 mov HV_MMU_IMMU | HV_MMU_DMMU, %o3
64 mov HV_FAST_MMU_MAP_PERM_ADDR, %o5
65 ta HV_FAST_TRAP
66
67 brnz,pn %o0, 80f
68 nop
69
70 add %l1, 1, %l1
71 cmp %l1, %l2
72 blt,a,pt %xcc, 1b
73 add %l3, HVTRAMP_MAPPING_SIZE, %l3
74
75 ldx [%l0 + HVTRAMP_DESCR_FAULT_INFO_PA], %o0
76 mov HV_FAST_MMU_FAULT_AREA_CONF, %o5
77 ta HV_FAST_TRAP
78
79 brnz,pn %o0, 80f
80 nop
81
82 wrpr %g0, (PSTATE_PRIV | PSTATE_PEF), %pstate
83
84 ldx [%l0 + HVTRAMP_DESCR_THREAD_REG], %l6
85
86 mov 1, %o0
87 set 1f, %o1
88 mov HV_FAST_MMU_ENABLE, %o5
89 ta HV_FAST_TRAP
90
91 ba,pt %xcc, 80f
92 nop
93
941:
95 wr %g0, 0, %fprs
96 wr %g0, ASI_P, %asi
97
98 mov PRIMARY_CONTEXT, %g7
99 stxa %g0, [%g7] ASI_MMU
100 membar #Sync
101
102 mov SECONDARY_CONTEXT, %g7
103 stxa %g0, [%g7] ASI_MMU
104 membar #Sync
105
106 mov %l6, %g6
107 ldx [%g6 + TI_TASK], %g4
108
109 mov 1, %g5
110 sllx %g5, THREAD_SHIFT, %g5
111 sub %g5, (STACKFRAME_SZ + STACK_BIAS), %g5
112 add %g6, %g5, %sp
113
114 call init_irqwork_curcpu
115 nop
116 call hard_smp_processor_id
117 nop
118
119 call sun4v_register_mondo_queues
120 nop
121
122 call init_cur_cpu_trap
123 mov %g6, %o0
124
125 wrpr %g0, (PSTATE_PRIV | PSTATE_PEF | PSTATE_IE), %pstate
126
127 call smp_callin
128 nop
129
130 call cpu_panic
131 nop
132
13380: ba,pt %xcc, 80b
134 nop
135
136 .align 8
137hv_cpu_startup_end: