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Subject[PATCH 2/4] LoongArch: Add JUMP_LINK_ADDR macro implementation to avoid using la.abs
Date
Add JUMP_LINK_ADDR macro implementation to avoid using la.abs.

Signed-off-by: Youling Tang <tangyouling@loongson.cn>
---
arch/loongarch/include/asm/stackframe.h | 8 ++++++++
arch/loongarch/kernel/head.S | 10 ++++------
arch/loongarch/power/suspend_asm.S | 5 ++---
3 files changed, 14 insertions(+), 9 deletions(-)

diff --git a/arch/loongarch/include/asm/stackframe.h b/arch/loongarch/include/asm/stackframe.h
index 96c94035b5d0..f538b3a6d680 100644
--- a/arch/loongarch/include/asm/stackframe.h
+++ b/arch/loongarch/include/asm/stackframe.h
@@ -216,4 +216,12 @@
RESTORE_SP_AND_RET \docfi
.endm

+/* Jump to the virtual address of the link. */
+ .macro JUMP_LINK_ADDR
+ li.d t0, CACHE_BASE
+ pcaddi t1, 0
+ or t0, t0, t1
+ jirl zero, t0, 0xc
+ .endm
+
#endif /* _ASM_STACKFRAME_H */
diff --git a/arch/loongarch/kernel/head.S b/arch/loongarch/kernel/head.S
index aa6181714ec3..e8a4bf9d7599 100644
--- a/arch/loongarch/kernel/head.S
+++ b/arch/loongarch/kernel/head.S
@@ -52,9 +52,8 @@ SYM_CODE_START(kernel_entry) # kernel entry point

/* We might not get launched at the address the kernel is linked to,
so we jump there. */
- la.abs t0, 0f
- jr t0
-0:
+ JUMP_LINK_ADDR
+
/* Enable PG */
li.w t0, 0xb0 # PLV=0, IE=0, PG=1
csrwr t0, LOONGARCH_CSR_CRMD
@@ -106,9 +105,8 @@ SYM_CODE_START(smpboot_entry)
li.d t0, CSR_DMW1_INIT # CA, PLV0
csrwr t0, LOONGARCH_CSR_DMWIN1

- la.abs t0, 0f
- jr t0
-0:
+ JUMP_LINK_ADDR
+
/* Enable PG */
li.w t0, 0xb0 # PLV=0, IE=0, PG=1
csrwr t0, LOONGARCH_CSR_CRMD
diff --git a/arch/loongarch/power/suspend_asm.S b/arch/loongarch/power/suspend_asm.S
index eb2675642f9f..596a682a7924 100644
--- a/arch/loongarch/power/suspend_asm.S
+++ b/arch/loongarch/power/suspend_asm.S
@@ -78,9 +78,8 @@ SYM_INNER_LABEL(loongarch_wakeup_start, SYM_L_GLOBAL)
li.d t0, CSR_DMW1_INIT # CA, PLV0
csrwr t0, LOONGARCH_CSR_DMWIN1

- la.abs t0, 0f
- jr t0
-0:
+ JUMP_LINK_ADDR
+
la.pcrel t0, acpi_saved_sp
ld.d sp, t0, 0
SETUP_WAKEUP
--
2.37.1
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