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authorMax Filippov <jcmvbkbc@gmail.com>2018-12-05 23:48:19 +0300
committerMax Filippov <jcmvbkbc@gmail.com>2018-12-05 23:53:07 +0300
commit037602705109ec2ab96340bea93ad87daa3ac046 (patch)
tree616c10e2e60b8a6bfbe388366ea1c1c3f170dafb /arch
parentf37598be4e3896359e87c824be57ddddc280cc3f (diff)
downloadlinux-037602705109ec2ab96340bea93ad87daa3ac046.tar.xz
xtensa: don't use l32r opcode directly
xtensa assembler is capable of representing register loads with either movi + addmi, l32r or const16, depending on the core configuration. Don't use '.literal' and 'l32r' directly in the code, use 'movi' and let the assembler relax them. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/xtensa/boot/boot-elf/bootstrap.S29
-rw-r--r--arch/xtensa/include/asm/futex.h8
-rw-r--r--arch/xtensa/include/asm/uaccess.h10
-rw-r--r--arch/xtensa/kernel/head.S8
4 files changed, 24 insertions, 31 deletions
diff --git a/arch/xtensa/boot/boot-elf/bootstrap.S b/arch/xtensa/boot/boot-elf/bootstrap.S
index 29c68426ab56..99e98c9bae41 100644
--- a/arch/xtensa/boot/boot-elf/bootstrap.S
+++ b/arch/xtensa/boot/boot-elf/bootstrap.S
@@ -29,17 +29,7 @@ _ResetVector:
.begin no-absolute-literals
.literal_position
-#if defined(CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX) && \
- XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY
- .literal RomInitAddr, CONFIG_KERNEL_LOAD_ADDRESS
-#else
- .literal RomInitAddr, KERNELOFFSET
-#endif
-#ifndef CONFIG_PARSE_BOOTPARAM
- .literal RomBootParam, 0
-#else
- .literal RomBootParam, _bootparam
-
+#ifdef CONFIG_PARSE_BOOTPARAM
.align 4
_bootparam:
.short BP_TAG_FIRST
@@ -66,13 +56,22 @@ _SetupMMU:
initialize_mmu
#endif
- .end no-absolute-literals
-
rsil a0, XCHAL_DEBUGLEVEL-1
rsync
reset:
- l32r a0, RomInitAddr
- l32r a2, RomBootParam
+#if defined(CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX) && \
+ XCHAL_HAVE_PTP_MMU && XCHAL_HAVE_SPANNING_WAY
+ movi a0, CONFIG_KERNEL_LOAD_ADDRESS
+#else
+ movi a0, KERNELOFFSET
+#endif
+#ifdef CONFIG_PARSE_BOOTPARAM
+ movi a2, _bootparam
+#else
+ movi a2, 0
+#endif
movi a3, 0
movi a4, 0
jx a0
+
+ .end no-absolute-literals
diff --git a/arch/xtensa/include/asm/futex.h b/arch/xtensa/include/asm/futex.h
index 5bfbc1c401d4..fd0eef6b8e7c 100644
--- a/arch/xtensa/include/asm/futex.h
+++ b/arch/xtensa/include/asm/futex.h
@@ -32,8 +32,8 @@
"3:\n" \
" .section .fixup,\"ax\"\n" \
" .align 4\n" \
- "4: .long 3b\n" \
- "5: l32r %0, 4b\n" \
+ " .literal_position\n" \
+ "5: movi %0, 3b\n" \
" movi %1, %3\n" \
" jx %0\n" \
" .previous\n" \
@@ -108,8 +108,8 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
"2:\n"
" .section .fixup,\"ax\"\n"
" .align 4\n"
- "3: .long 2b\n"
- "4: l32r %1, 3b\n"
+ " .literal_position\n"
+ "4: movi %1, 2b\n"
" movi %0, %7\n"
" jx %1\n"
" .previous\n"
diff --git a/arch/xtensa/include/asm/uaccess.h b/arch/xtensa/include/asm/uaccess.h
index f1158b4c629c..d11ef2939652 100644
--- a/arch/xtensa/include/asm/uaccess.h
+++ b/arch/xtensa/include/asm/uaccess.h
@@ -159,10 +159,9 @@ __asm__ __volatile__( \
"2: \n" \
" .section .fixup,\"ax\" \n" \
" .align 4 \n" \
- "4: \n" \
- " .long 2b \n" \
+ " .literal_position \n" \
"5: \n" \
- " l32r %1, 4b \n" \
+ " movi %1, 2b \n" \
" movi %0, %4 \n" \
" jx %1 \n" \
" .previous \n" \
@@ -217,10 +216,9 @@ __asm__ __volatile__( \
"2: \n" \
" .section .fixup,\"ax\" \n" \
" .align 4 \n" \
- "4: \n" \
- " .long 2b \n" \
+ " .literal_position \n" \
"5: \n" \
- " l32r %1, 4b \n" \
+ " movi %1, 2b \n" \
" movi %2, 0 \n" \
" movi %0, %4 \n" \
" jx %1 \n" \
diff --git a/arch/xtensa/kernel/head.S b/arch/xtensa/kernel/head.S
index 9053a5622d2c..da08e75100ab 100644
--- a/arch/xtensa/kernel/head.S
+++ b/arch/xtensa/kernel/head.S
@@ -59,10 +59,6 @@ ENTRY(_start)
.align 4
.literal_position
-.Lstartup:
- .word _startup
-
- .align 4
_SetupOCD:
/*
* Initialize WB, WS, and clear PS.EXCM (to allow loop instructions).
@@ -99,12 +95,12 @@ _SetupMMU:
1:
#endif
#endif
- .end no-absolute-literals
- l32r a0, .Lstartup
+ movi a0, _startup
jx a0
ENDPROC(_start)
+ .end no-absolute-literals
__REF
.literal_position