1 /*
2 * Copyright (c) 2018-2019, ARM Limited and Contributors. All rights reserved.
3 *
4 * SPDX-License-Identifier: BSD-3-Clause
5 */
6
7 /* Top level SMC handler for SiP calls. Dispatch PM calls to PM SMC handler. */
8
9 #include <common/debug.h>
10 #include <common/runtime_svc.h>
11 #include <tools_share/uuid.h>
12
13 #include "ipi_mailbox_svc.h"
14 #include "pm_svc_main.h"
15
16 /* SMC function IDs for SiP Service queries */
17 #define VERSAL_SIP_SVC_CALL_COUNT 0x8200ff00
18 #define VERSAL_SIP_SVC_UID 0x8200ff01
19 #define VERSAL_SIP_SVC_VERSION 0x8200ff03
20
21 /* SiP Service Calls version numbers */
22 #define SIP_SVC_VERSION_MAJOR 0
23 #define SIP_SVC_VERSION_MINOR 1
24
25 /* These macros are used to identify PM calls from the SMC function ID */
26 #define PM_FID_MASK 0xf000u
27 #define PM_FID_VALUE 0u
28 #define IPI_FID_VALUE 0x1000u
29 #define is_pm_fid(_fid) (((_fid) & PM_FID_MASK) == PM_FID_VALUE)
30 #define is_ipi_fid(_fid) (((_fid) & PM_FID_MASK) == IPI_FID_VALUE)
31
32 /* SiP Service UUID */
33 DEFINE_SVC_UUID2(versal_sip_uuid,
34 0x2ab9e4ec, 0x93b9, 0x11e7, 0xa0, 0x19,
35 0xdf, 0xe0, 0xdb, 0xad, 0x0a, 0xe0);
36
37 /**
38 * sip_svc_setup() - Setup SiP Service
39 *
40 * Invokes PM setup
41 */
sip_svc_setup(void)42 static int32_t sip_svc_setup(void)
43 {
44 /* PM implementation as SiP Service */
45 pm_setup();
46
47 return 0;
48 }
49
50 /**
51 * sip_svc_smc_handler() - Top-level SiP Service SMC handler
52 *
53 * Handler for all SiP SMC calls. Handles standard SIP requests
54 * and calls PM SMC handler if the call is for a PM-API function.
55 */
sip_svc_smc_handler(uint32_t smc_fid,u_register_t x1,u_register_t x2,u_register_t x3,u_register_t x4,void * cookie,void * handle,u_register_t flags)56 uintptr_t sip_svc_smc_handler(uint32_t smc_fid,
57 u_register_t x1,
58 u_register_t x2,
59 u_register_t x3,
60 u_register_t x4,
61 void *cookie,
62 void *handle,
63 u_register_t flags)
64 {
65 /* Let PM SMC handler deal with PM-related requests */
66 if (is_pm_fid(smc_fid)) {
67 return pm_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle,
68 flags);
69 }
70
71 /* Let IPI SMC handler deal with IPI-related requests */
72 if (is_ipi_fid(smc_fid)) {
73 return ipi_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle,
74 flags);
75 }
76
77 /* Let PM SMC handler deal with PM-related requests */
78 switch (smc_fid) {
79 case VERSAL_SIP_SVC_CALL_COUNT:
80 /* PM functions + default functions */
81 SMC_RET1(handle, 2);
82
83 case VERSAL_SIP_SVC_UID:
84 SMC_UUID_RET(handle, versal_sip_uuid);
85
86 case VERSAL_SIP_SVC_VERSION:
87 SMC_RET2(handle, SIP_SVC_VERSION_MAJOR, SIP_SVC_VERSION_MINOR);
88
89 default:
90 WARN("Unimplemented SiP Service Call: 0x%x\n", smc_fid);
91 SMC_RET1(handle, SMC_UNK);
92 }
93 }
94
95 /* Register PM Service Calls as runtime service */
96 DECLARE_RT_SVC(
97 sip_svc,
98 OEN_SIP_START,
99 OEN_SIP_END,
100 SMC_TYPE_FAST,
101 sip_svc_setup,
102 sip_svc_smc_handler);
103