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fc8c745d AK |
1 | /* |
2 | * SPAPR machine hooks to Virtual Open Firmware, | |
3 | * | |
4 | * SPDX-License-Identifier: GPL-2.0-or-later | |
5 | */ | |
6 | #include "qemu/osdep.h" | |
fc8c745d AK |
7 | #include "qapi/error.h" |
8 | #include "hw/ppc/spapr.h" | |
9 | #include "hw/ppc/spapr_vio.h" | |
21bde1ec | 10 | #include "hw/ppc/spapr_cpu_core.h" |
fc8c745d AK |
11 | #include "hw/ppc/fdt.h" |
12 | #include "hw/ppc/vof.h" | |
13 | #include "sysemu/sysemu.h" | |
14 | #include "qom/qom-qobject.h" | |
15 | #include "trace.h" | |
16 | ||
17 | target_ulong spapr_h_vof_client(PowerPCCPU *cpu, SpaprMachineState *spapr, | |
18 | target_ulong opcode, target_ulong *_args) | |
19 | { | |
20 | int ret = vof_client_call(MACHINE(spapr), spapr->vof, spapr->fdt_blob, | |
21 | ppc64_phys_to_real(_args[0])); | |
22 | ||
23 | if (ret) { | |
24 | return H_PARAMETER; | |
25 | } | |
26 | return H_SUCCESS; | |
27 | } | |
28 | ||
29 | void spapr_vof_client_dt_finalize(SpaprMachineState *spapr, void *fdt) | |
30 | { | |
31 | char *stdout_path = spapr_vio_stdout_path(spapr->vio_bus); | |
fc8c745d AK |
32 | |
33 | vof_build_dt(fdt, spapr->vof); | |
34 | ||
21bde1ec AK |
35 | if (spapr->vof->bootargs) { |
36 | int chosen; | |
37 | ||
38 | _FDT(chosen = fdt_path_offset(fdt, "/chosen")); | |
39 | /* | |
40 | * If the client did not change "bootargs", spapr_dt_chosen() must have | |
41 | * stored machine->kernel_cmdline in it before getting here. | |
42 | */ | |
43 | _FDT(fdt_setprop_string(fdt, chosen, "bootargs", spapr->vof->bootargs)); | |
44 | } | |
fc8c745d AK |
45 | |
46 | /* | |
47 | * SLOF-less setup requires an open instance of stdout for early | |
48 | * kernel printk. By now all phandles are settled so we can open | |
49 | * the default serial console. | |
50 | */ | |
51 | if (stdout_path) { | |
52 | _FDT(vof_client_open_store(fdt, spapr->vof, "/chosen", "stdout", | |
53 | stdout_path)); | |
54 | } | |
55 | } | |
56 | ||
21bde1ec | 57 | void spapr_vof_reset(SpaprMachineState *spapr, void *fdt, Error **errp) |
fc8c745d | 58 | { |
21bde1ec | 59 | target_ulong stack_ptr; |
fc8c745d | 60 | Vof *vof = spapr->vof; |
21bde1ec | 61 | PowerPCCPU *first_ppc_cpu = POWERPC_CPU(first_cpu); |
fc8c745d AK |
62 | |
63 | vof_init(vof, spapr->rma_size, errp); | |
64 | ||
21bde1ec AK |
65 | stack_ptr = vof_claim(vof, 0, VOF_STACK_SIZE, VOF_STACK_SIZE); |
66 | if (stack_ptr == -1) { | |
fc8c745d AK |
67 | error_setg(errp, "Memory allocation for stack failed"); |
68 | return; | |
69 | } | |
70 | /* Stack grows downwards plus reserve space for the minimum stack frame */ | |
21bde1ec | 71 | stack_ptr += VOF_STACK_SIZE - 0x20; |
fc8c745d AK |
72 | |
73 | if (spapr->kernel_size && | |
74 | vof_claim(vof, spapr->kernel_addr, spapr->kernel_size, 0) == -1) { | |
75 | error_setg(errp, "Memory for kernel is in use"); | |
76 | return; | |
77 | } | |
78 | ||
79 | if (spapr->initrd_size && | |
80 | vof_claim(vof, spapr->initrd_base, spapr->initrd_size, 0) == -1) { | |
81 | error_setg(errp, "Memory for initramdisk is in use"); | |
82 | return; | |
83 | } | |
84 | ||
85 | spapr_vof_client_dt_finalize(spapr, fdt); | |
86 | ||
21bde1ec AK |
87 | spapr_cpu_set_entry_state(first_ppc_cpu, SPAPR_ENTRY_POINT, |
88 | stack_ptr, spapr->initrd_base, | |
89 | spapr->initrd_size); | |
21bde1ec | 90 | |
fc8c745d AK |
91 | /* |
92 | * At this point the expected allocation map is: | |
93 | * | |
94 | * 0..c38 - the initial firmware | |
95 | * 8000..10000 - stack | |
96 | * 400000.. - kernel | |
97 | * 3ea0000.. - initramdisk | |
98 | * | |
99 | * We skip writing FDT as nothing expects it; OF client interface is | |
100 | * going to be used for reading the device tree. | |
101 | */ | |
102 | } | |
103 | ||
104 | void spapr_vof_quiesce(MachineState *ms) | |
105 | { | |
106 | SpaprMachineState *spapr = SPAPR_MACHINE(ms); | |
107 | ||
108 | spapr->fdt_size = fdt_totalsize(spapr->fdt_blob); | |
109 | spapr->fdt_initial_size = spapr->fdt_size; | |
110 | } | |
111 | ||
112 | bool spapr_vof_setprop(MachineState *ms, const char *path, const char *propname, | |
113 | void *val, int vallen) | |
114 | { | |
115 | SpaprMachineState *spapr = SPAPR_MACHINE(ms); | |
116 | ||
117 | /* | |
118 | * We only allow changing properties which we know how to update in QEMU | |
119 | * OR | |
120 | * the ones which we know that they need to survive during "quiesce". | |
121 | */ | |
122 | ||
123 | if (strcmp(path, "/rtas") == 0) { | |
124 | if (strcmp(propname, "linux,rtas-base") == 0 || | |
125 | strcmp(propname, "linux,rtas-entry") == 0) { | |
126 | /* These need to survive quiesce so let them store in the FDT */ | |
127 | return true; | |
128 | } | |
129 | } | |
130 | ||
131 | if (strcmp(path, "/chosen") == 0) { | |
132 | if (strcmp(propname, "bootargs") == 0) { | |
133 | Vof *vof = spapr->vof; | |
134 | ||
135 | g_free(vof->bootargs); | |
136 | vof->bootargs = g_strndup(val, vallen); | |
137 | return true; | |
138 | } | |
139 | if (strcmp(propname, "linux,initrd-start") == 0) { | |
140 | if (vallen == sizeof(uint32_t)) { | |
141 | spapr->initrd_base = ldl_be_p(val); | |
142 | return true; | |
143 | } | |
144 | if (vallen == sizeof(uint64_t)) { | |
145 | spapr->initrd_base = ldq_be_p(val); | |
146 | return true; | |
147 | } | |
148 | return false; | |
149 | } | |
150 | if (strcmp(propname, "linux,initrd-end") == 0) { | |
151 | if (vallen == sizeof(uint32_t)) { | |
152 | spapr->initrd_size = ldl_be_p(val) - spapr->initrd_base; | |
153 | return true; | |
154 | } | |
155 | if (vallen == sizeof(uint64_t)) { | |
156 | spapr->initrd_size = ldq_be_p(val) - spapr->initrd_base; | |
157 | return true; | |
158 | } | |
159 | return false; | |
160 | } | |
161 | } | |
162 | ||
163 | return true; | |
164 | } |