1 /*
2 * Copyright (c) 2013-2018, 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 is_pm_fid(_fid) (((_fid) & PM_FID_MASK) == PM_FID_VALUE)
29 #define is_ipi_fid(_fid) (((_fid) & PM_FID_MASK) == IPI_FID_VALUE)
30
31 /* SiP Service UUID */
32 DEFINE_SVC_UUID2(zynqmp_sip_uuid,
33 0x5c9b1b2a, 0x0586, 0x2340, 0xa6, 0x1b,
34 0xb9, 0x25, 0x82, 0x2d, 0xe3, 0xa5);
35
36 /**
37 * sip_svc_setup() - Setup SiP Service
38 *
39 * Invokes PM setup
40 */
sip_svc_setup(void)41 static int32_t sip_svc_setup(void)
42 {
43 /* PM implementation as SiP Service */
44 pm_setup();
45
46 return 0;
47 }
48
49 /**
50 * sip_svc_smc_handler() - Top-level SiP Service SMC handler
51 *
52 * Handler for all SiP SMC calls. Handles standard SIP requests
53 * and calls PM SMC handler if the call is for a PM-API function.
54 */
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)55 uintptr_t sip_svc_smc_handler(uint32_t smc_fid,
56 u_register_t x1,
57 u_register_t x2,
58 u_register_t x3,
59 u_register_t x4,
60 void *cookie,
61 void *handle,
62 u_register_t flags)
63 {
64 /* Let PM SMC handler deal with PM-related requests */
65 if (is_pm_fid(smc_fid)) {
66 return pm_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle,
67 flags);
68 }
69
70 /* Let IPI SMC handler deal with IPI-related requests */
71 if (is_ipi_fid(smc_fid)) {
72 return ipi_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle,
73 flags);
74 }
75
76 switch (smc_fid) {
77 case ZYNQMP_SIP_SVC_CALL_COUNT:
78 /* PM functions + default functions */
79 SMC_RET1(handle, PM_API_MAX + 2);
80
81 case ZYNQMP_SIP_SVC_UID:
82 SMC_UUID_RET(handle, zynqmp_sip_uuid);
83
84 case ZYNQMP_SIP_SVC_VERSION:
85 SMC_RET2(handle, SIP_SVC_VERSION_MAJOR, SIP_SVC_VERSION_MINOR);
86
87 default:
88 WARN("Unimplemented SiP Service Call: 0x%x\n", smc_fid);
89 SMC_RET1(handle, SMC_UNK);
90 }
91 }
92
93 /* Register PM Service Calls as runtime service */
94 DECLARE_RT_SVC(
95 sip_svc,
96 OEN_SIP_START,
97 OEN_SIP_END,
98 SMC_TYPE_FAST,
99 sip_svc_setup,
100 sip_svc_smc_handler);
101