ppc: Use r12 instead of r14 as GOT pointer.

r14 is not supposed to be clobbered by functions. Switch to r12 and call GET_GOT when needed. This will allow u-boot to loose the -ffixed-r14 gcc option. Signed-off-by: Joakim Tjernlund <[email protected]>
imaami · Jan 26, 2010 · 0f8aa15 · 0f8aa15
1 parent fc4e188
commit 0f8aa15
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Showing 13 changed files with 79 additions and 65 deletions.
diff --git a/cpu/74xx_7xx/start.S b/cpu/74xx_7xx/start.S
@@ -63,7 +63,7 @@
 /*
  * Set up GOT: Global Offset Table
  *
- * Use r14 to access the GOT
+ * Use r12 to access the GOT
  */
 	START_GOT
 	GOT_ENTRY(_GOT2_TABLE_)
@@ -599,6 +599,7 @@ relocate_code:
 	mr	r9,  r4		/* Save copy of Global Data pointer	*/
 	mr	r10, r5		/* Save copy of Destination Address	*/
 
+	GET_GOT
 	mr	r3,  r5				/* Destination Address	*/
 	lis	r4, CONFIG_SYS_MONITOR_BASE@h		/* Source      Address	*/
 	ori	r4, r4, CONFIG_SYS_MONITOR_BASE@l
@@ -616,7 +617,7 @@ relocate_code:
 	sub	r15, r10, r4
 
 	/* First our own GOT */
-	add	r14, r14, r15
+	add	r12, r12, r15
 	/* then the one used by the C code */
 	add	r30, r30, r15
 
@@ -691,7 +692,7 @@ in_ram:
 	bl	board_init_ecc
 #endif
 	/*
-	 * Relocation Function, r14 point to got2+0x8000
+	 * Relocation Function, r12 point to got2+0x8000
 	 *
 	 * Adjust got2 pointers, no need to check for 0, this code
 	 * already puts a few entries in the table.
@@ -765,15 +766,15 @@ in_ram:
 	 */
 	.globl	trap_init
 trap_init:
+	mflr	r4			/* save link register		*/
+	GET_GOT
 	lwz	r7, GOT(_start)
 	lwz	r8, GOT(_end_of_vectors)
 
 	li	r9, 0x100		/* reset vector always at 0x100 */
 
 	cmplw	0, r7, r8
 	bgelr				/* return if r7>=r8 - just in case */
-
-	mflr	r4			/* save link register		*/
 1:
 	lwz	r0, 0(r7)
 	stw	r0, 0(r9)

diff --git a/cpu/mpc512x/start.S b/cpu/mpc512x/start.S
@@ -65,7 +65,7 @@
 /*
  * Set up GOT: Global Offset Table
  *
- * Use r14 to access the GOT
+ * Use r12 to access the GOT
  */
 	START_GOT
 	GOT_ENTRY(_GOT2_TABLE_)
@@ -486,6 +486,7 @@ relocate_code:
 	mr	r9,  r4		/* Save copy of Global Data pointer */
 	mr	r10, r5		/* Save copy of Destination Address */
 
+	GET_GOT
 	mr	r3,  r5				/* Destination Address */
 	lis	r4, CONFIG_SYS_MONITOR_BASE@h		/* Source      Address */
 	ori	r4, r4, CONFIG_SYS_MONITOR_BASE@l
@@ -504,7 +505,7 @@ relocate_code:
 	sub	r15, r10, r4
 
 	/* First our own GOT */
-	add	r14, r14, r15
+	add	r12, r12, r15
 	/* then the one used by the C code */
 	add	r30, r30, r15
 
@@ -584,7 +585,7 @@ relocate_code:
 
 in_ram:
 	/*
-	 * Relocation Function, r14 point to got2+0x8000
+	 * Relocation Function, r12 point to got2+0x8000
 	 *
 	 * Adjust got2 pointers, no need to check for 0, this code
 	 * already puts a few entries in the table.
@@ -648,15 +649,15 @@ clear_bss:
 	 */
 	.globl	trap_init
 trap_init:
+	mflr	r4		/* save link register */
+	GET_GOT
 	lwz	r7, GOT(_start)
 	lwz	r8, GOT(_end_of_vectors)
 
 	li	r9, 0x100	/* reset vector at 0x100 */
 
 	cmplw	0, r7, r8
 	bgelr			/* return if r7>=r8 - just in case */
-
-	mflr	r4		/* save link register */
 1:
 	lwz	r0, 0(r7)
 	stw	r0, 0(r9)

diff --git a/cpu/mpc5xx/start.S b/cpu/mpc5xx/start.S
@@ -56,7 +56,7 @@
 /*
  * Set up GOT: Global Offset Table
  *
- * Use r14 to access the GOT
+ * Use r12 to access the GOT
  */
 	START_GOT
 	GOT_ENTRY(_GOT2_TABLE_)
@@ -372,6 +372,7 @@ relocate_code:
 	mr	r9,  r4		/* Save copy of global data pointer in SRAM */
 	mr	r10, r5		/* Save copy of monitor destination Address in SRAM */
 
+	GET_GOT
 	mr	r3,  r5				/* Destination Address	*/
 	lis	r4, CONFIG_SYS_MONITOR_BASE@h		/* Source      Address	*/
 	ori	r4, r4, CONFIG_SYS_MONITOR_BASE@l
@@ -388,7 +389,7 @@ relocate_code:
 	sub	r15, r10, r4
 
 	/* First our own GOT */
-	add	r14, r14, r15
+	add	r12, r12, r15
 	/* the the one used by the C code */
 	add	r30, r30, r15
 
@@ -433,7 +434,7 @@ relocate_code:
 in_ram:
 
 	/*
-	 * Relocation Function, r14 point to got2+0x8000
+	 * Relocation Function, r12 point to got2+0x8000
 	 *
 	 * Adjust got2 pointers, no need to check for 0, this code
 	 * already puts a few entries in the table.
@@ -497,15 +498,15 @@ clear_bss:
 	 */
 	.globl	trap_init
 trap_init:
+	mflr	r4			/* save link register		*/
+	GET_GOT
 	lwz	r7, GOT(_start)
 	lwz	r8, GOT(_end_of_vectors)
 
 	li	r9, 0x100		/* reset vector always at 0x100 */
 
 	cmplw	0, r7, r8
 	bgelr				/* return if r7>=r8 - just in case */
-
-	mflr	r4			/* save link register		*/
 1:
 	lwz	r0, 0(r7)
 	stw	r0, 0(r9)

diff --git a/cpu/mpc5xxx/start.S b/cpu/mpc5xxx/start.S
@@ -56,7 +56,7 @@
 /*
  * Set up GOT: Global Offset Table
  *
- * Use r14 to access the GOT
+ * Use r12 to access the GOT
  */
 	START_GOT
 	GOT_ENTRY(_GOT2_TABLE_)
@@ -567,6 +567,7 @@ relocate_code:
 	mr	r9,  r4		/* Save copy of Global Data pointer	*/
 	mr	r10, r5		/* Save copy of Destination Address	*/
 
+	GET_GOT
 	mr	r3,  r5				/* Destination Address	*/
 	lis	r4, CONFIG_SYS_MONITOR_BASE@h		/* Source      Address	*/
 	ori	r4, r4, CONFIG_SYS_MONITOR_BASE@l
@@ -584,7 +585,7 @@ relocate_code:
 	sub	r15, r10, r4
 
 	/* First our own GOT */
-	add	r14, r14, r15
+	add	r12, r12, r15
 	/* then the one used by the C code */
 	add	r30, r30, r15
 
@@ -657,7 +658,7 @@ relocate_code:
 in_ram:
 
 	/*
-	 * Relocation Function, r14 point to got2+0x8000
+	 * Relocation Function, r12 point to got2+0x8000
 	 *
 	 * Adjust got2 pointers, no need to check for 0, this code
 	 * already puts a few entries in the table.
@@ -722,15 +723,15 @@ clear_bss:
 	 */
 	.globl	trap_init
 trap_init:
+	mflr	r4			/* save link register		*/
+	GET_GOT
 	lwz	r7, GOT(_start)
 	lwz	r8, GOT(_end_of_vectors)
 
 	li	r9, 0x100		/* reset vector always at 0x100 */
 
 	cmplw	0, r7, r8
 	bgelr				/* return if r7>=r8 - just in case */
-
-	mflr	r4			/* save link register		*/
 1:
 	lwz	r0, 0(r7)
 	stw	r0, 0(r9)

diff --git a/cpu/mpc8220/start.S b/cpu/mpc8220/start.S
@@ -55,7 +55,7 @@
 /*
  * Set up GOT: Global Offset Table
  *
- * Use r14 to access the GOT
+ * Use r12 to access the GOT
  */
 	START_GOT
 	GOT_ENTRY(_GOT2_TABLE_)
@@ -532,6 +532,7 @@ relocate_code:
 	mr	r9,  r4	    /* Save copy of Global Data pointer */
 	mr	r10, r5	    /* Save copy of Destination Address */
 
+	GET_GOT
 	mr	r3,  r5	    /* Destination Address		*/
 	lis	r4, CONFIG_SYS_MONITOR_BASE@h	/* Source Address	*/
 	ori	r4, r4, CONFIG_SYS_MONITOR_BASE@l
@@ -549,7 +550,7 @@ relocate_code:
 	sub	r15, r10, r4
 
 	/* First our own GOT */
-	add	r14, r14, r15
+	add	r12, r12, r15
 	/* then the one used by the C code */
 	add	r30, r30, r15
 
@@ -622,7 +623,7 @@ relocate_code:
 in_ram:
 
 	/*
-	 * Relocation Function, r14 point to got2+0x8000
+	 * Relocation Function, r12 point to got2+0x8000
 	 *
 	 * Adjust got2 pointers, no need to check for 0, this code
 	 * already puts a few entries in the table.
@@ -687,15 +688,15 @@ clear_bss:
 	 */
 	.globl	trap_init
 trap_init:
+	mflr	r4	    /* save link register		*/
+	GET_GOT
 	lwz	r7, GOT(_start)
 	lwz	r8, GOT(_end_of_vectors)
 
 	li	r9, 0x100   /* reset vector always at 0x100	*/
 
 	cmplw	0, r7, r8
 	bgelr		    /* return if r7>=r8 - just in case	*/
-
-	mflr	r4	    /* save link register		*/
 1:
 	lwz	r0, 0(r7)
 	stw	r0, 0(r9)

diff --git a/cpu/mpc824x/start.S b/cpu/mpc824x/start.S
@@ -63,7 +63,7 @@
 /*
  * Set up GOT: Global Offset Table
  *
- * Use r14 to access the GOT
+ * Use r12 to access the GOT
  */
 	START_GOT
 	GOT_ENTRY(_GOT2_TABLE_)
@@ -462,6 +462,7 @@ relocate_code:
 	mr	r9,  r4		/* Save copy of Global Data pointer	*/
 	mr	r10, r5		/* Save copy of Destination Address	*/
 
+	GET_GOT
 	mr	r3,  r5				/* Destination Address	*/
 #ifdef CONFIG_SYS_RAMBOOT
 	lis	r4, CONFIG_SYS_SDRAM_BASE@h		/* Source      Address	*/
@@ -484,7 +485,7 @@ relocate_code:
 	sub	r15, r10, r4
 
 	/* First our own GOT */
-	add	r14, r14, r15
+	add	r12, r12, r15
 	/* the the one used by the C code */
 	add	r30, r30, r15
 
@@ -564,7 +565,7 @@ relocate_code:
 in_ram:
 
 	/*
-	 * Relocation Function, r14 point to got2+0x8000
+	 * Relocation Function, r12 point to got2+0x8000
 	 *
 	 * Adjust got2 pointers, no need to check for 0, this code
 	 * already puts a few entries in the table.
@@ -629,15 +630,15 @@ clear_bss:
 	 */
 	.globl	trap_init
 trap_init:
+	mflr	r4			/* save link register		*/
+	GET_GOT
 	lwz	r7, GOT(_start)
 	lwz	r8, GOT(_end_of_vectors)
 
 	li	r9, 0x100		/* reset vector always at 0x100 */
 
 	cmplw	0, r7, r8
 	bgelr				/* return if r7>=r8 - just in case */
-
-	mflr	r4			/* save link register		*/
 1:
 	lwz	r0, 0(r7)
 	stw	r0, 0(r9)

diff --git a/cpu/mpc8260/start.S b/cpu/mpc8260/start.S
@@ -56,7 +56,7 @@
 /*
  * Set up GOT: Global Offset Table
  *
- * Use r14 to access the GOT
+ * Use r12 to access the GOT
  */
 	START_GOT
 	GOT_ENTRY(_GOT2_TABLE_)
@@ -650,7 +650,9 @@ init_debug:
 	/* RAM should now be operational */
 
 #define VEC_WRD_CNT	((_end_of_vectors - _start + EXC_OFF_SYS_RESET) / 4)
-
+	mflr	r3
+	GET_GOT
+	mtlr	r3
 	lwz	r3, GOT(_end_of_vectors)
 	rlwinm	r4, r3, 0, 18, 31	/* _end_of_vectors & 0x3FFF	*/
 	lis	r5, VEC_WRD_CNT@h
@@ -792,6 +794,7 @@ relocate_code:
 	mr	r9,  r4		/* Save copy of Global Data pointer	*/
 	mr	r10, r5		/* Save copy of Destination Address	*/
 
+	GET_GOT
 	mr	r3,  r5				/* Destination Address	*/
 	lis	r4, CONFIG_SYS_MONITOR_BASE@h		/* Source      Address	*/
 	ori	r4, r4, CONFIG_SYS_MONITOR_BASE@l
@@ -809,7 +812,7 @@ relocate_code:
 	sub	r15, r10, r4
 
 	/* First our own GOT */
-	add	r14, r14, r15
+	add	r12, r12, r15
 	/* then the one used by the C code */
 	add	r30, r30, r15
 
@@ -882,7 +885,7 @@ relocate_code:
 in_ram:
 
 	/*
-	 * Relocation Function, r14 point to got2+0x8000
+	 * Relocation Function, r12 point to got2+0x8000
 	 *
 	 * Adjust got2 pointers, no need to check for 0, this code
 	 * already puts a few entries in the table.
@@ -958,15 +961,15 @@ clear_bss:
 	 */
 	.globl	trap_init
 trap_init:
+	mflr	r4			/* save link register		*/
+	GET_GOT
 	lwz	r7, GOT(_start)
 	lwz	r8, GOT(_end_of_vectors)
 
 	li	r9, 0x100		/* reset vector always at 0x100 */
 
 	cmplw	0, r7, r8
 	bgelr				/* return if r7>=r8 - just in case */
-
-	mflr	r4			/* save link register		*/
 1:
 	lwz	r0, 0(r7)
 	stw	r0, 0(r9)