root / hw / ppce500_spin.c @ a0f42610
History | View | Annotate | Download (5.4 kB)
1 | 5c145dac | Alexander Graf | /*
|
---|---|---|---|
2 | 5c145dac | Alexander Graf | * QEMU PowerPC e500v2 ePAPR spinning code
|
3 | 5c145dac | Alexander Graf | *
|
4 | 5c145dac | Alexander Graf | * Copyright (C) 2011 Freescale Semiconductor, Inc. All rights reserved.
|
5 | 5c145dac | Alexander Graf | *
|
6 | 5c145dac | Alexander Graf | * Author: Alexander Graf, <agraf@suse.de>
|
7 | 5c145dac | Alexander Graf | *
|
8 | 5c145dac | Alexander Graf | * This library is free software; you can redistribute it and/or
|
9 | 5c145dac | Alexander Graf | * modify it under the terms of the GNU Lesser General Public
|
10 | 5c145dac | Alexander Graf | * License as published by the Free Software Foundation; either
|
11 | 5c145dac | Alexander Graf | * version 2 of the License, or (at your option) any later version.
|
12 | 5c145dac | Alexander Graf | *
|
13 | 5c145dac | Alexander Graf | * This library is distributed in the hope that it will be useful,
|
14 | 5c145dac | Alexander Graf | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
15 | 5c145dac | Alexander Graf | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
16 | 5c145dac | Alexander Graf | * Lesser General Public License for more details.
|
17 | 5c145dac | Alexander Graf | *
|
18 | 5c145dac | Alexander Graf | * You should have received a copy of the GNU Lesser General Public
|
19 | 5c145dac | Alexander Graf | * License along with this library; if not, see <http://www.gnu.org/licenses/>.
|
20 | 5c145dac | Alexander Graf | *
|
21 | 5c145dac | Alexander Graf | * This code is not really a device, but models an interface that usually
|
22 | 5c145dac | Alexander Graf | * firmware takes care of. It's used when QEMU plays the role of firmware.
|
23 | 5c145dac | Alexander Graf | *
|
24 | 5c145dac | Alexander Graf | * Specification:
|
25 | 5c145dac | Alexander Graf | *
|
26 | 5c145dac | Alexander Graf | * https://www.power.org/resources/downloads/Power_ePAPR_APPROVED_v1.1.pdf
|
27 | 5c145dac | Alexander Graf | *
|
28 | 5c145dac | Alexander Graf | */
|
29 | 5c145dac | Alexander Graf | |
30 | 5c145dac | Alexander Graf | #include "hw.h" |
31 | 5c145dac | Alexander Graf | #include "sysemu.h" |
32 | 5c145dac | Alexander Graf | #include "sysbus.h" |
33 | 5c145dac | Alexander Graf | #include "kvm.h" |
34 | 5c145dac | Alexander Graf | |
35 | 5c145dac | Alexander Graf | #define MAX_CPUS 32 |
36 | 5c145dac | Alexander Graf | |
37 | 5c145dac | Alexander Graf | typedef struct spin_info { |
38 | 5c145dac | Alexander Graf | uint64_t addr; |
39 | 5c145dac | Alexander Graf | uint64_t r3; |
40 | 5c145dac | Alexander Graf | uint32_t resv; |
41 | 5c145dac | Alexander Graf | uint32_t pir; |
42 | 5c145dac | Alexander Graf | uint64_t reserved; |
43 | 5c145dac | Alexander Graf | } __attribute__ ((packed)) SpinInfo; |
44 | 5c145dac | Alexander Graf | |
45 | 5c145dac | Alexander Graf | typedef struct spin_state { |
46 | 5c145dac | Alexander Graf | SysBusDevice busdev; |
47 | 5c145dac | Alexander Graf | MemoryRegion iomem; |
48 | 5c145dac | Alexander Graf | SpinInfo spin[MAX_CPUS]; |
49 | 5c145dac | Alexander Graf | } SpinState; |
50 | 5c145dac | Alexander Graf | |
51 | 5c145dac | Alexander Graf | typedef struct spin_kick { |
52 | 5c145dac | Alexander Graf | CPUState *env; |
53 | 5c145dac | Alexander Graf | SpinInfo *spin; |
54 | 5c145dac | Alexander Graf | } SpinKick; |
55 | 5c145dac | Alexander Graf | |
56 | 5c145dac | Alexander Graf | static void spin_reset(void *opaque) |
57 | 5c145dac | Alexander Graf | { |
58 | 5c145dac | Alexander Graf | SpinState *s = opaque; |
59 | 5c145dac | Alexander Graf | int i;
|
60 | 5c145dac | Alexander Graf | |
61 | 5c145dac | Alexander Graf | for (i = 0; i < MAX_CPUS; i++) { |
62 | 5c145dac | Alexander Graf | SpinInfo *info = &s->spin[i]; |
63 | 5c145dac | Alexander Graf | |
64 | 5c145dac | Alexander Graf | info->pir = i; |
65 | 5c145dac | Alexander Graf | info->r3 = i; |
66 | 5c145dac | Alexander Graf | info->addr = 1;
|
67 | 5c145dac | Alexander Graf | } |
68 | 5c145dac | Alexander Graf | } |
69 | 5c145dac | Alexander Graf | |
70 | 5c145dac | Alexander Graf | /* Create -kernel TLB entries for BookE, linearly spanning 256MB. */
|
71 | 5c145dac | Alexander Graf | static inline target_phys_addr_t booke206_page_size_to_tlb(uint64_t size) |
72 | 5c145dac | Alexander Graf | { |
73 | 5c145dac | Alexander Graf | return (ffs(size >> 10) - 1) >> 1; |
74 | 5c145dac | Alexander Graf | } |
75 | 5c145dac | Alexander Graf | |
76 | 5c145dac | Alexander Graf | static void mmubooke_create_initial_mapping(CPUState *env, |
77 | 5c145dac | Alexander Graf | target_ulong va, |
78 | 5c145dac | Alexander Graf | target_phys_addr_t pa, |
79 | 5c145dac | Alexander Graf | target_phys_addr_t len) |
80 | 5c145dac | Alexander Graf | { |
81 | 5c145dac | Alexander Graf | ppcmas_tlb_t *tlb = booke206_get_tlbm(env, 1, 0, 1); |
82 | 5c145dac | Alexander Graf | target_phys_addr_t size; |
83 | 5c145dac | Alexander Graf | |
84 | 5c145dac | Alexander Graf | size = (booke206_page_size_to_tlb(len) << MAS1_TSIZE_SHIFT); |
85 | 5c145dac | Alexander Graf | tlb->mas1 = MAS1_VALID | size; |
86 | 5c145dac | Alexander Graf | tlb->mas2 = (va & TARGET_PAGE_MASK) | MAS2_M; |
87 | 5c145dac | Alexander Graf | tlb->mas7_3 = pa & TARGET_PAGE_MASK; |
88 | 5c145dac | Alexander Graf | tlb->mas7_3 |= MAS3_UR | MAS3_UW | MAS3_UX | MAS3_SR | MAS3_SW | MAS3_SX; |
89 | 5c145dac | Alexander Graf | } |
90 | 5c145dac | Alexander Graf | |
91 | 5c145dac | Alexander Graf | static void spin_kick(void *data) |
92 | 5c145dac | Alexander Graf | { |
93 | 5c145dac | Alexander Graf | SpinKick *kick = data; |
94 | 5c145dac | Alexander Graf | CPUState *env = kick->env; |
95 | 5c145dac | Alexander Graf | SpinInfo *curspin = kick->spin; |
96 | 5c145dac | Alexander Graf | target_phys_addr_t map_size = 64 * 1024 * 1024; |
97 | 5c145dac | Alexander Graf | target_phys_addr_t map_start; |
98 | 5c145dac | Alexander Graf | |
99 | 5c145dac | Alexander Graf | cpu_synchronize_state(env); |
100 | 5c145dac | Alexander Graf | stl_p(&curspin->pir, env->spr[SPR_PIR]); |
101 | 5c145dac | Alexander Graf | env->nip = ldq_p(&curspin->addr) & (map_size - 1);
|
102 | 5c145dac | Alexander Graf | env->gpr[3] = ldq_p(&curspin->r3);
|
103 | 5c145dac | Alexander Graf | env->gpr[4] = 0; |
104 | 5c145dac | Alexander Graf | env->gpr[5] = 0; |
105 | 5c145dac | Alexander Graf | env->gpr[6] = 0; |
106 | 5c145dac | Alexander Graf | env->gpr[7] = map_size;
|
107 | 5c145dac | Alexander Graf | env->gpr[8] = 0; |
108 | 5c145dac | Alexander Graf | env->gpr[9] = 0; |
109 | 5c145dac | Alexander Graf | |
110 | 5c145dac | Alexander Graf | map_start = ldq_p(&curspin->addr) & ~(map_size - 1);
|
111 | 5c145dac | Alexander Graf | mmubooke_create_initial_mapping(env, 0, map_start, map_size);
|
112 | 5c145dac | Alexander Graf | |
113 | 5c145dac | Alexander Graf | env->halted = 0;
|
114 | 5c145dac | Alexander Graf | env->exception_index = -1;
|
115 | 157feead | Liu Yu-B13201 | env->stopped = 0;
|
116 | 5c145dac | Alexander Graf | qemu_cpu_kick(env); |
117 | 5c145dac | Alexander Graf | } |
118 | 5c145dac | Alexander Graf | |
119 | 5c145dac | Alexander Graf | static void spin_write(void *opaque, target_phys_addr_t addr, uint64_t value, |
120 | 5c145dac | Alexander Graf | unsigned len)
|
121 | 5c145dac | Alexander Graf | { |
122 | 5c145dac | Alexander Graf | SpinState *s = opaque; |
123 | 5c145dac | Alexander Graf | int env_idx = addr / sizeof(SpinInfo); |
124 | 5c145dac | Alexander Graf | CPUState *env; |
125 | 5c145dac | Alexander Graf | SpinInfo *curspin = &s->spin[env_idx]; |
126 | 5c145dac | Alexander Graf | uint8_t *curspin_p = (uint8_t*)curspin; |
127 | 5c145dac | Alexander Graf | |
128 | 5c145dac | Alexander Graf | for (env = first_cpu; env != NULL; env = env->next_cpu) { |
129 | 5c145dac | Alexander Graf | if (env->cpu_index == env_idx) {
|
130 | 5c145dac | Alexander Graf | break;
|
131 | 5c145dac | Alexander Graf | } |
132 | 5c145dac | Alexander Graf | } |
133 | 5c145dac | Alexander Graf | |
134 | 5c145dac | Alexander Graf | if (!env) {
|
135 | 5c145dac | Alexander Graf | /* Unknown CPU */
|
136 | 5c145dac | Alexander Graf | return;
|
137 | 5c145dac | Alexander Graf | } |
138 | 5c145dac | Alexander Graf | |
139 | 5c145dac | Alexander Graf | if (!env->cpu_index) {
|
140 | 5c145dac | Alexander Graf | /* primary CPU doesn't spin */
|
141 | 5c145dac | Alexander Graf | return;
|
142 | 5c145dac | Alexander Graf | } |
143 | 5c145dac | Alexander Graf | |
144 | 5c145dac | Alexander Graf | curspin_p = &curspin_p[addr % sizeof(SpinInfo)];
|
145 | 5c145dac | Alexander Graf | switch (len) {
|
146 | 5c145dac | Alexander Graf | case 1: |
147 | 5c145dac | Alexander Graf | stb_p(curspin_p, value); |
148 | 5c145dac | Alexander Graf | break;
|
149 | 5c145dac | Alexander Graf | case 2: |
150 | 5c145dac | Alexander Graf | stw_p(curspin_p, value); |
151 | 5c145dac | Alexander Graf | break;
|
152 | 5c145dac | Alexander Graf | case 4: |
153 | 5c145dac | Alexander Graf | stl_p(curspin_p, value); |
154 | 5c145dac | Alexander Graf | break;
|
155 | 5c145dac | Alexander Graf | } |
156 | 5c145dac | Alexander Graf | |
157 | 5c145dac | Alexander Graf | if (!(ldq_p(&curspin->addr) & 1)) { |
158 | 5c145dac | Alexander Graf | /* run CPU */
|
159 | 5c145dac | Alexander Graf | SpinKick kick = { |
160 | 5c145dac | Alexander Graf | .env = env, |
161 | 5c145dac | Alexander Graf | .spin = curspin, |
162 | 5c145dac | Alexander Graf | }; |
163 | 5c145dac | Alexander Graf | |
164 | 5c145dac | Alexander Graf | run_on_cpu(env, spin_kick, &kick); |
165 | 5c145dac | Alexander Graf | } |
166 | 5c145dac | Alexander Graf | } |
167 | 5c145dac | Alexander Graf | |
168 | 5c145dac | Alexander Graf | static uint64_t spin_read(void *opaque, target_phys_addr_t addr, unsigned len) |
169 | 5c145dac | Alexander Graf | { |
170 | 5c145dac | Alexander Graf | SpinState *s = opaque; |
171 | 5c145dac | Alexander Graf | uint8_t *spin_p = &((uint8_t*)s->spin)[addr]; |
172 | 5c145dac | Alexander Graf | |
173 | 5c145dac | Alexander Graf | switch (len) {
|
174 | 5c145dac | Alexander Graf | case 1: |
175 | 5c145dac | Alexander Graf | return ldub_p(spin_p);
|
176 | 5c145dac | Alexander Graf | case 2: |
177 | 5c145dac | Alexander Graf | return lduw_p(spin_p);
|
178 | 5c145dac | Alexander Graf | case 4: |
179 | 5c145dac | Alexander Graf | return ldl_p(spin_p);
|
180 | 5c145dac | Alexander Graf | default:
|
181 | 5c145dac | Alexander Graf | assert(0);
|
182 | 5c145dac | Alexander Graf | } |
183 | 5c145dac | Alexander Graf | } |
184 | 5c145dac | Alexander Graf | |
185 | 5c145dac | Alexander Graf | const MemoryRegionOps spin_rw_ops = {
|
186 | 5c145dac | Alexander Graf | .read = spin_read, |
187 | 5c145dac | Alexander Graf | .write = spin_write, |
188 | 5c145dac | Alexander Graf | .endianness = DEVICE_BIG_ENDIAN, |
189 | 5c145dac | Alexander Graf | }; |
190 | 5c145dac | Alexander Graf | |
191 | 5c145dac | Alexander Graf | static int ppce500_spin_initfn(SysBusDevice *dev) |
192 | 5c145dac | Alexander Graf | { |
193 | 5c145dac | Alexander Graf | SpinState *s; |
194 | 5c145dac | Alexander Graf | |
195 | 5c145dac | Alexander Graf | s = FROM_SYSBUS(SpinState, sysbus_from_qdev(dev)); |
196 | 5c145dac | Alexander Graf | |
197 | 5c145dac | Alexander Graf | memory_region_init_io(&s->iomem, &spin_rw_ops, s, "e500 spin pv device",
|
198 | 5c145dac | Alexander Graf | sizeof(SpinInfo) * MAX_CPUS);
|
199 | 750ecd44 | Avi Kivity | sysbus_init_mmio(dev, &s->iomem); |
200 | 5c145dac | Alexander Graf | |
201 | 5c145dac | Alexander Graf | qemu_register_reset(spin_reset, s); |
202 | 5c145dac | Alexander Graf | |
203 | 5c145dac | Alexander Graf | return 0; |
204 | 5c145dac | Alexander Graf | } |
205 | 5c145dac | Alexander Graf | |
206 | 5c145dac | Alexander Graf | static SysBusDeviceInfo ppce500_spin_info = {
|
207 | 5c145dac | Alexander Graf | .init = ppce500_spin_initfn, |
208 | 5c145dac | Alexander Graf | .qdev.name = "e500-spin",
|
209 | 5c145dac | Alexander Graf | .qdev.size = sizeof(SpinState),
|
210 | 5c145dac | Alexander Graf | }; |
211 | 5c145dac | Alexander Graf | |
212 | 5c145dac | Alexander Graf | static void ppce500_spin_register(void) |
213 | 5c145dac | Alexander Graf | { |
214 | 5c145dac | Alexander Graf | sysbus_register_withprop(&ppce500_spin_info); |
215 | 5c145dac | Alexander Graf | } |
216 | 5c145dac | Alexander Graf | device_init(ppce500_spin_register); |