1
2
3
4
5
6
7
8
9
10
11#include <linux/arm-smccc.h>
12#include <linux/cpu_pm.h>
13#include <linux/kernel.h>
14#include <linux/init.h>
15#include <linux/io.h>
16#include <linux/memblock.h>
17#include <linux/of.h>
18
19#include <asm/cacheflush.h>
20#include <asm/memblock.h>
21
22#include "common.h"
23#include "omap-secure.h"
24#include "soc.h"
25
26static phys_addr_t omap_secure_memblock_base;
27
28bool optee_available;
29
30#define OMAP_SIP_SMC_STD_CALL_VAL(func_num) \
31 ARM_SMCCC_CALL_VAL(ARM_SMCCC_STD_CALL, ARM_SMCCC_SMC_32, \
32 ARM_SMCCC_OWNER_SIP, (func_num))
33
34static void __init omap_optee_init_check(void)
35{
36 struct device_node *np;
37
38
39
40
41
42
43 np = of_find_node_by_path("/firmware/optee");
44 if (np && of_device_is_available(np))
45 optee_available = true;
46 of_node_put(np);
47}
48
49
50
51
52
53
54
55
56
57
58
59u32 omap_secure_dispatcher(u32 idx, u32 flag, u32 nargs, u32 arg1, u32 arg2,
60 u32 arg3, u32 arg4)
61{
62 u32 ret;
63 u32 param[5];
64
65 param[0] = nargs;
66 param[1] = arg1;
67 param[2] = arg2;
68 param[3] = arg3;
69 param[4] = arg4;
70
71
72
73
74
75 flush_cache_all();
76 outer_clean_range(__pa(param), __pa(param + 5));
77 ret = omap_smc2(idx, flag, __pa(param));
78
79 return ret;
80}
81
82void omap_smccc_smc(u32 fn, u32 arg)
83{
84 struct arm_smccc_res res;
85
86 arm_smccc_smc(OMAP_SIP_SMC_STD_CALL_VAL(fn), arg,
87 0, 0, 0, 0, 0, 0, &res);
88 WARN(res.a0, "Secure function call 0x%08x failed\n", fn);
89}
90
91void omap_smc1(u32 fn, u32 arg)
92{
93
94
95
96
97 if (optee_available)
98 omap_smccc_smc(fn, arg);
99 else
100 _omap_smc1(fn, arg);
101}
102
103
104int __init omap_secure_ram_reserve_memblock(void)
105{
106 u32 size = OMAP_SECURE_RAM_STORAGE;
107
108 size = ALIGN(size, SECTION_SIZE);
109 omap_secure_memblock_base = arm_memblock_steal(size, SECTION_SIZE);
110
111 return 0;
112}
113
114phys_addr_t omap_secure_ram_mempool_base(void)
115{
116 return omap_secure_memblock_base;
117}
118
119#if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM)
120u32 omap3_save_secure_ram(void __iomem *addr, int size)
121{
122 u32 ret;
123 u32 param[5];
124
125 if (size != OMAP3_SAVE_SECURE_RAM_SZ)
126 return OMAP3_SAVE_SECURE_RAM_SZ;
127
128 param[0] = 4;
129 param[1] = __pa(addr);
130 param[2] = 0;
131 param[3] = 1;
132 param[4] = 1;
133
134 ret = save_secure_ram_context(__pa(param));
135
136 return ret;
137}
138#endif
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153u32 rx51_secure_dispatcher(u32 idx, u32 process, u32 flag, u32 nargs,
154 u32 arg1, u32 arg2, u32 arg3, u32 arg4)
155{
156 u32 ret;
157 u32 param[5];
158
159 param[0] = nargs+1;
160 param[1] = arg1;
161 param[2] = arg2;
162 param[3] = arg3;
163 param[4] = arg4;
164
165
166
167
168
169 local_irq_disable();
170 local_fiq_disable();
171 flush_cache_all();
172 outer_clean_range(__pa(param), __pa(param + 5));
173 ret = omap_smc3(idx, process, flag, __pa(param));
174 flush_cache_all();
175 local_fiq_enable();
176 local_irq_enable();
177
178 return ret;
179}
180
181
182
183
184
185
186
187
188u32 rx51_secure_update_aux_cr(u32 set_bits, u32 clear_bits)
189{
190 u32 acr;
191
192
193 asm volatile ("mrc p15, 0, %0, c1, c0, 1" : "=r" (acr));
194 acr &= ~clear_bits;
195 acr |= set_bits;
196
197 return rx51_secure_dispatcher(RX51_PPA_WRITE_ACR,
198 0,
199 FLAG_START_CRITICAL,
200 1, acr, 0, 0, 0);
201}
202
203
204
205
206u32 rx51_secure_rng_call(u32 ptr, u32 count, u32 flag)
207{
208 return rx51_secure_dispatcher(RX51_PPA_HWRNG,
209 0,
210 NO_FLAG,
211 3, ptr, count, flag, 0);
212}
213
214void __init omap_secure_init(void)
215{
216 omap_optee_init_check();
217}
218
219
220
221
222
223
224
225
226static int cpu_notifier(struct notifier_block *nb, unsigned long cmd, void *v)
227{
228 switch (cmd) {
229 case CPU_CLUSTER_PM_EXIT:
230 omap_secure_dispatcher(OMAP4_PPA_SERVICE_0,
231 FLAG_START_CRITICAL,
232 0, 0, 0, 0, 0);
233 break;
234 default:
235 break;
236 }
237
238 return NOTIFY_OK;
239}
240
241static struct notifier_block secure_notifier_block = {
242 .notifier_call = cpu_notifier,
243};
244
245static int __init secure_pm_init(void)
246{
247 if (omap_type() == OMAP2_DEVICE_TYPE_GP || !soc_is_omap44xx())
248 return 0;
249
250 cpu_pm_register_notifier(&secure_notifier_block);
251
252 return 0;
253}
254omap_arch_initcall(secure_pm_init);
255