|
Last change
on this file since 101297 was 99404, checked in by vboxsync, 2 years ago |
|
Devices/EFI/FirmwareNew: Update to edk2-stable202302 and make it build, bugref:4643
|
-
Property svn:eol-style
set to
native
|
|
File size:
979 bytes
|
| Line | |
|---|
| 1 | //------------------------------------------------------------------------------
|
|---|
| 2 | //
|
|---|
| 3 | // Make ECALL to SBI
|
|---|
| 4 | //
|
|---|
| 5 | // Copyright (c) 2023, Ventana Micro Systems Inc. All rights reserved.<BR>
|
|---|
| 6 | //
|
|---|
| 7 | // SPDX-License-Identifier: BSD-2-Clause-Patent
|
|---|
| 8 | //
|
|---|
| 9 | //------------------------------------------------------------------------------
|
|---|
| 10 |
|
|---|
| 11 | #include <Register/RiscV64/RiscVImpl.h>
|
|---|
| 12 |
|
|---|
| 13 | .data
|
|---|
| 14 | .align 3
|
|---|
| 15 | .section .text
|
|---|
| 16 |
|
|---|
| 17 | //
|
|---|
| 18 | // Make ECALL to SBI
|
|---|
| 19 | // ecall updates the same a0 and a1 registers with
|
|---|
| 20 | // return values. Hence, the C function which calls
|
|---|
| 21 | // this should pass the address of Arg0 and Arg1.
|
|---|
| 22 | // This routine saves the address and updates it
|
|---|
| 23 | // with a0 and a1 once ecall returns.
|
|---|
| 24 | //
|
|---|
| 25 | // @param a0 : Pointer to Arg0
|
|---|
| 26 | // @param a1 : Pointer to Arg1
|
|---|
| 27 | // @param a2 : Arg2
|
|---|
| 28 | // @param a3 : Arg3
|
|---|
| 29 | // @param a4 : Arg4
|
|---|
| 30 | // @param a5 : Arg5
|
|---|
| 31 | // @param a6 : FunctionID
|
|---|
| 32 | // @param a7 : ExtensionId
|
|---|
| 33 | //
|
|---|
| 34 | ASM_FUNC (RiscVSbiEcall)
|
|---|
| 35 | mv t0, a0
|
|---|
| 36 | mv t1, a1
|
|---|
| 37 | ld a0, 0(a0)
|
|---|
| 38 | ld a1, 0(a1)
|
|---|
| 39 | ecall
|
|---|
| 40 | sd a0, 0(t0)
|
|---|
| 41 | sd a1, 0(t1)
|
|---|
| 42 | ret
|
|---|
Note:
See
TracBrowser
for help on using the repository browser.
