From 89149adf197a278e07b7f60e13bb3135df9bb671 Mon Sep 17 00:00:00 2001
From: Denis Orlov <denorl2009@gmail.com>
Date: Mon, 5 Jun 2023 23:10:47 +0300
Subject: MIPS: make setjmp/longjmp/initjmp available in 64BIT builds

Make the code compatible with 64-bit configurations by storing saved
register values with unsigned long type and using generic macros in
assembly code.

Signed-off-by: Denis Orlov <denorl2009@gmail.com>
Link: https://lore.barebox.org/20230605202634.42175-17-denorl2009@gmail.com
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 arch/mips/Kconfig              |  2 +-
 arch/mips/include/asm/setjmp.h |  2 +-
 arch/mips/lib/setjmp.S         | 48 +++++++++++++++++++++---------------------
 3 files changed, 26 insertions(+), 26 deletions(-)

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index de2f539cc1..e05ee2d7f1 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -10,6 +10,7 @@ config MIPS
 	select HAVE_PBL_MULTI_IMAGES
 	select HAS_DMA
 	select ARCH_HAS_DATA_ABORT_MASK
+	select ARCH_HAS_SJLJ
 	select ELF
 	default y
 
@@ -305,7 +306,6 @@ choice
 config 32BIT
 	bool "32-bit barebox"
 	depends on CPU_SUPPORTS_32BIT_KERNEL && SYS_SUPPORTS_32BIT_KERNEL
-	select ARCH_HAS_SJLJ
 	help
 	  Select this option if you want to build a 32-bit barebox.
 
diff --git a/arch/mips/include/asm/setjmp.h b/arch/mips/include/asm/setjmp.h
index 81f4d4c15f..39e01e27df 100644
--- a/arch/mips/include/asm/setjmp.h
+++ b/arch/mips/include/asm/setjmp.h
@@ -19,7 +19,7 @@ typedef struct __jmp_buf_internal_tag {
 	void *__sp;
 
 	/* Callee-saved registers s0 through s7.  */
-	int __regs[8];
+	unsigned long __regs[8];
 
 	/* The frame pointer.  */
 	void *__fp;
diff --git a/arch/mips/lib/setjmp.S b/arch/mips/lib/setjmp.S
index b09a7c5529..42a2ec15a9 100644
--- a/arch/mips/lib/setjmp.S
+++ b/arch/mips/lib/setjmp.S
@@ -6,34 +6,34 @@
 
 /* int setjmp (jmp_buf);  */
 LEAF(setjmp)
-	sw	ra, (0 * 4)(a0)
-	sw	sp, (1 * 4)(a0)
-	sw	s0, (2 * 4)(a0)
-	sw	s1, (3 * 4)(a0)
-	sw	s2, (4 * 4)(a0)
-	sw	s3, (5 * 4)(a0)
-	sw	s4, (6 * 4)(a0)
-	sw	s5, (7 * 4)(a0)
-	sw	s6, (8 * 4)(a0)
-	sw	s7, (9 * 4)(a0)
-	sw	fp, (10 * 4)(a0)
+	REG_S	ra, (0 * SZREG)(a0)
+	REG_S	sp, (1 * SZREG)(a0)
+	REG_S	s0, (2 * SZREG)(a0)
+	REG_S	s1, (3 * SZREG)(a0)
+	REG_S	s2, (4 * SZREG)(a0)
+	REG_S	s3, (5 * SZREG)(a0)
+	REG_S	s4, (6 * SZREG)(a0)
+	REG_S	s5, (7 * SZREG)(a0)
+	REG_S	s6, (8 * SZREG)(a0)
+	REG_S	s7, (9 * SZREG)(a0)
+	REG_S	fp, (10 * SZREG)(a0)
 	move	v0, zero
 	j	ra
 END(setjmp)
 
 /* volatile void longjmp (jmp_buf, int);  */
 LEAF(longjmp)
-	lw	ra, (0 * 4)(a0)
-	lw	sp, (1 * 4)(a0)
-	lw	s0, (2 * 4)(a0)
-	lw	s1, (3 * 4)(a0)
-	lw	s2, (4 * 4)(a0)
-	lw	s3, (5 * 4)(a0)
-	lw	s4, (6 * 4)(a0)
-	lw	s5, (7 * 4)(a0)
-	lw	s6, (8 * 4)(a0)
-	lw	s7, (9 * 4)(a0)
-	lw	fp, (10 * 4)(a0)
+	REG_L	ra, (0 * SZREG)(a0)
+	REG_L	sp, (1 * SZREG)(a0)
+	REG_L	s0, (2 * SZREG)(a0)
+	REG_L	s1, (3 * SZREG)(a0)
+	REG_L	s2, (4 * SZREG)(a0)
+	REG_L	s3, (5 * SZREG)(a0)
+	REG_L	s4, (6 * SZREG)(a0)
+	REG_L	s5, (7 * SZREG)(a0)
+	REG_L	s6, (8 * SZREG)(a0)
+	REG_L	s7, (9 * SZREG)(a0)
+	REG_L	fp, (10 * SZREG)(a0)
 	bne	a1, zero, 1f
 	li	a1, 1
 1:
@@ -43,8 +43,8 @@ END(longjmp)
 
 /* int initjmp(jmp_buf jmp, void __noreturn (*func)(void), void *stack_top); */
 LEAF(initjmp)
-	sw	a1, (0 * 4)(a0)
-	sw	a2, (1 * 4)(a0)
+	REG_S	a1, (0 * SZREG)(a0)
+	REG_S	a2, (1 * SZREG)(a0)
 	move	v0, zero
 	j	ra
 END(initjmp)
-- 
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