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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /arch/riscv/purgatory/entry.S
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/riscv/purgatory/entry.S')
-rw-r--r--arch/riscv/purgatory/entry.S47
1 files changed, 47 insertions, 0 deletions
diff --git a/arch/riscv/purgatory/entry.S b/arch/riscv/purgatory/entry.S
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+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * purgatory: Runs between two kernels
+ *
+ * Copyright (C) 2022 Huawei Technologies Co, Ltd.
+ *
+ * Author: Li Zhengyu (lizhengyu3@huawei.com)
+ *
+ */
+
+.macro size, sym:req
+ .size \sym, . - \sym
+.endm
+
+.text
+
+.globl purgatory_start
+purgatory_start:
+
+ lla sp, .Lstack
+ mv s0, a0 /* The hartid of the current hart */
+ mv s1, a1 /* Phys address of the FDT image */
+
+ jal purgatory
+
+ /* Start new image. */
+ mv a0, s0
+ mv a1, s1
+ ld a2, riscv_kernel_entry
+ jr a2
+
+size purgatory_start
+
+.align 4
+ .rept 256
+ .quad 0
+ .endr
+.Lstack:
+
+.data
+
+.globl riscv_kernel_entry
+riscv_kernel_entry:
+ .quad 0
+size riscv_kernel_entry
+
+.end