1 /*
2 * Copyright (c) 2013-2020, 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/runtime_svc.h>
10 #include <tools_share/uuid.h>
11
12 #include "ipi_mailbox_svc.h"
13 #include "pm_svc_main.h"
14
15 /* SMC function IDs for SiP Service queries */
16 #define ZYNQMP_SIP_SVC_CALL_COUNT 0x8200ff00
17 #define ZYNQMP_SIP_SVC_UID 0x8200ff01
18 #define ZYNQMP_SIP_SVC_VERSION 0x8200ff03
19
20 /* SiP Service Calls version numbers */
21 #define SIP_SVC_VERSION_MAJOR 0
22 #define SIP_SVC_VERSION_MINOR 1
23
24 /* These macros are used to identify PM, IPI calls from the SMC function ID */
25 #define PM_FID_MASK 0xf000u
26 #define PM_FID_VALUE 0u
27 #define IPI_FID_VALUE 0x1000u
28 #define EM_FID_MASK 0xf0000u
29 #define EM_FID_VALUE 0xE0000u
30 #define is_em_fid(_fid) (((_fid) & EM_FID_MASK) == EM_FID_VALUE)
31 #define is_pm_fid(_fid) (((_fid) & PM_FID_MASK) == PM_FID_VALUE)
32 #define is_ipi_fid(_fid) (((_fid) & PM_FID_MASK) == IPI_FID_VALUE)
33
34 /* SiP Service UUID */
35 DEFINE_SVC_UUID2(zynqmp_sip_uuid,
36 0x5c9b1b2a, 0x0586, 0x2340, 0xa6, 0x1b,
37 0xb9, 0x25, 0x82, 0x2d, 0xe3, 0xa5);
38
39 /**
40 * sip_svc_setup() - Setup SiP Service
41 *
42 * Invokes PM setup
43 */
sip_svc_setup(void)44 static int32_t sip_svc_setup(void)
45 {
46 /* PM implementation as SiP Service */
47 return pm_setup();
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 EM SMC handler deal with EM-related requests */
66 if (is_em_fid(smc_fid)) {
67 return em_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle,
68 flags);
69 } else if (is_pm_fid(smc_fid)) {
70 /* Let PM SMC handler deal with PM-related requests */
71 return pm_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle,
72 flags);
73 }
74
75 /* Let IPI SMC handler deal with IPI-related requests */
76 if (is_ipi_fid(smc_fid)) {
77 return ipi_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle,
78 flags);
79 }
80
81 switch (smc_fid) {
82 case ZYNQMP_SIP_SVC_CALL_COUNT:
83 /* PM functions + default functions */
84 SMC_RET1(handle, PM_API_MAX + 2);
85
86 case ZYNQMP_SIP_SVC_UID:
87 SMC_UUID_RET(handle, zynqmp_sip_uuid);
88
89 case ZYNQMP_SIP_SVC_VERSION:
90 SMC_RET2(handle, SIP_SVC_VERSION_MAJOR, SIP_SVC_VERSION_MINOR);
91
92 default:
93 WARN("Unimplemented SiP Service Call: 0x%x\n", smc_fid);
94 SMC_RET1(handle, SMC_UNK);
95 }
96 }
97
98 /* Register PM Service Calls as runtime service */
99 DECLARE_RT_SVC(
100 sip_svc,
101 OEN_SIP_START,
102 OEN_SIP_END,
103 SMC_TYPE_FAST,
104 sip_svc_setup,
105 sip_svc_smc_handler);
106