1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2014, Cavium Inc.
4 * (C) Copyright 2017, Xilinx Inc.
8 #include <asm-offsets.h>
10 #include <efi_loader.h>
12 #include <asm/macro.h>
14 #include <asm/system.h>
17 * Issue the hypervisor call
19 * x0~x7: input arguments
20 * x0~x3: output arguments
22 static void __efi_runtime hvc_call(struct pt_regs *args)
38 : "+m" (args->regs[0]), "+m" (args->regs[1]),
39 "+m" (args->regs[2]), "+m" (args->regs[3])
40 : "m" (args->regs[4]), "m" (args->regs[5]),
41 "m" (args->regs[6]), "m" (args->regs[7])
42 : "x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7",
43 "x8", "x9", "x10", "x11", "x12", "x13", "x14", "x15",
48 * void smc_call(arg0, arg1...arg7)
50 * issue the secure monitor call
52 * x0~x7: input arguments
53 * x0~x3: output arguments
56 void __efi_runtime smc_call(struct pt_regs *args)
71 : "+m" (args->regs[0]), "+m" (args->regs[1]),
72 "+m" (args->regs[2]), "+m" (args->regs[3])
73 : "m" (args->regs[4]), "m" (args->regs[5]),
75 : "x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7",
76 "x8", "x9", "x10", "x11", "x12", "x13", "x14", "x15",
81 * For now, all systems we support run at least in EL2 and thus
82 * trigger PSCI calls to EL3 using SMC. If anyone ever wants to
83 * use PSCI on U-Boot running below a hypervisor, please detect
84 * this and set the flag accordingly.
86 static const __efi_runtime_data bool use_smc_for_psci = true;
88 void __noreturn __efi_runtime psci_system_reset(void)
92 regs.regs[0] = ARM_PSCI_0_2_FN_SYSTEM_RESET;
103 void __noreturn __efi_runtime psci_system_off(void)
107 regs.regs[0] = ARM_PSCI_0_2_FN_SYSTEM_OFF;
109 if (use_smc_for_psci)
118 #ifdef CONFIG_CMD_POWEROFF
119 int do_poweroff(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
121 puts("poweroff ...\n");
123 udelay(50000); /* wait 50 ms */
125 disable_interrupts();
134 #ifdef CONFIG_PSCI_RESET
135 void reset_misc(void)
140 #ifdef CONFIG_EFI_LOADER
141 void __efi_runtime EFIAPI efi_reset_system(
142 enum efi_reset_type reset_type,
143 efi_status_t reset_status,
144 unsigned long data_size, void *reset_data)
146 if (reset_type == EFI_RESET_COLD ||
147 reset_type == EFI_RESET_WARM ||
148 reset_type == EFI_RESET_PLATFORM_SPECIFIC) {
150 } else if (reset_type == EFI_RESET_SHUTDOWN) {
156 #endif /* CONFIG_EFI_LOADER */
157 #endif /* CONFIG_PSCI_RESET */