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ee446e15fb
On RISC-V systems system the Supervisory Binary Interface provides system reset and poweroff. Use it at EFI runtime. Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
30 lines
811 B
C
30 lines
811 B
C
// SPDX-License-Identifier: GPL-2.0-or-later
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#include <efi_loader.h>
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#include <asm/sbi.h>
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void __efi_runtime EFIAPI efi_reset_system(enum efi_reset_type reset_type,
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efi_status_t reset_status,
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unsigned long data_size,
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void *reset_data)
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{
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register unsigned long eid asm("a7") = SBI_EXT_SRST;
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register unsigned long fid asm("a6") = SBI_EXT_SRST_RESET;
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register unsigned long type asm("a0");
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register unsigned long reason asm("a1") = SBI_SRST_RESET_REASON_NONE;
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switch (reset_type) {
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case EFI_RESET_WARM:
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type = SBI_SRST_RESET_TYPE_WARM_REBOOT;
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break;
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case EFI_RESET_SHUTDOWN:
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type = SBI_SRST_RESET_TYPE_SHUTDOWN;
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break;
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default:
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type = SBI_SRST_RESET_TYPE_COLD_REBOOT;
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break;
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}
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asm volatile ("ecall\n"
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: : "r" (eid), "r" (fid), "r" (type), "r" (reason));
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}
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