diff --git a/README b/README
index a5ffbb5ad15cad1cf5faef53566562b0b5cabaf4..b4966a0df669949a2cd15f1139598bedfd0b2e9c 100644
--- a/README
+++ b/README
@@ -3499,7 +3499,7 @@ GCC's implementation.
For PowerPC, the following registers have specific use:
R1: stack pointer
- R2: TOC pointer
+ R2: reserved for system use
R3-R4: parameter passing and return values
R5-R10: parameter passing
R13: small data area pointer
@@ -3508,7 +3508,7 @@ For PowerPC, the following registers have specific use:
(U-Boot also uses R14 as internal GOT pointer.)
- ==> U-Boot will use R29 to hold a pointer to the global data
+ ==> U-Boot will use R2 to hold a pointer to the global data
Note: on PPC, we could use a static initializer (since the
address of the global data structure is known at compile time),
diff --git a/cpu/74xx_7xx/config.mk b/cpu/74xx_7xx/config.mk
index 417d99f33bedb44012da0d845d8b1d78c5aadc8e..324f62b836da85354c1d191d1f39cfcf55a1ec19 100644
--- a/cpu/74xx_7xx/config.mk
+++ b/cpu/74xx_7xx/config.mk
@@ -23,4 +23,4 @@
PLATFORM_RELFLAGS += -fPIC -ffixed-r14 -meabi -fno-strict-aliasing
-PLATFORM_CPPFLAGS += -DCONFIG_74xx_7xx -ffixed-r2 -ffixed-r29 -mstring
+PLATFORM_CPPFLAGS += -DCONFIG_74xx_7xx -ffixed-r2 -mstring
diff --git a/cpu/mpc512x/config.mk b/cpu/mpc512x/config.mk
index 8a07c5a3b679cc4c0308c32de290ab70eb4d661a..5b7e1f2682b8c3829e26897efed16284b06e9a29 100644
--- a/cpu/mpc512x/config.mk
+++ b/cpu/mpc512x/config.mk
@@ -22,4 +22,4 @@
PLATFORM_RELFLAGS += -fPIC -ffixed-r14 -meabi
PLATFORM_CPPFLAGS += -DCONFIG_MPC512X -DCONFIG_E300 \
- -ffixed-r2 -ffixed-r29 -msoft-float -mcpu=603e
+ -ffixed-r2 -msoft-float -mcpu=603e
diff --git a/cpu/mpc5xx/config.mk b/cpu/mpc5xx/config.mk
index 64cd60071ad4085ab2ae1b583545ce51bccb68f1..6d66c32bee181b3b722bd7f5e5f81d949e7f297c 100644
--- a/cpu/mpc5xx/config.mk
+++ b/cpu/mpc5xx/config.mk
@@ -30,7 +30,7 @@
PLATFORM_RELFLAGS += -fPIC -ffixed-r14 -meabi
-PLATFORM_CPPFLAGS += -DCONFIG_5xx -ffixed-r2 -ffixed-r29 -mpowerpc -msoft-float
+PLATFORM_CPPFLAGS += -DCONFIG_5xx -ffixed-r2 -mpowerpc -msoft-float
# Use default linker script. Board port can override in board/*/config.mk
LDSCRIPT := $(SRCTREE)/cpu/mpc5xx/u-boot.lds
diff --git a/cpu/mpc5xxx/config.mk b/cpu/mpc5xxx/config.mk
index 0df51babd70b558cb1649bd8031a202e003e3b49..b0ce2ee9e3ee05aa66d1ce315aaf9bd58a3cb719 100644
--- a/cpu/mpc5xxx/config.mk
+++ b/cpu/mpc5xxx/config.mk
@@ -23,7 +23,7 @@
PLATFORM_RELFLAGS += -fPIC -ffixed-r14 -meabi
-PLATFORM_CPPFLAGS += -DCONFIG_MPC5xxx -ffixed-r2 -ffixed-r29 \
+PLATFORM_CPPFLAGS += -DCONFIG_MPC5xxx -ffixed-r2 \
-mstring -mcpu=603e -mmultiple
# Use default linker script. Board port can override in board/*/config.mk
diff --git a/cpu/mpc8220/config.mk b/cpu/mpc8220/config.mk
index 8e3ba54287cbab5b70975f8bba9f847277e91013..5819048d01ab5367d8fc0738d46770208192100b 100644
--- a/cpu/mpc8220/config.mk
+++ b/cpu/mpc8220/config.mk
@@ -23,7 +23,7 @@
PLATFORM_RELFLAGS += -fPIC -ffixed-r14 -meabi
-PLATFORM_CPPFLAGS += -DCONFIG_MPC8220 -ffixed-r2 -ffixed-r29 \
+PLATFORM_CPPFLAGS += -DCONFIG_MPC8220 -ffixed-r2 \
-mstring -mcpu=603e -mmultiple
# Use default linker script. Board port can override in board/*/config.mk
diff --git a/cpu/mpc824x/config.mk b/cpu/mpc824x/config.mk
index 66207f4354dfac4b59089ff895f5b2bfc1248d4e..1bb0487bd3ba464233dfc765bf26053de9724fec 100644
--- a/cpu/mpc824x/config.mk
+++ b/cpu/mpc824x/config.mk
@@ -23,7 +23,7 @@
PLATFORM_RELFLAGS += -fPIC -ffixed-r14 -meabi -fno-strict-aliasing
-PLATFORM_CPPFLAGS += -DCONFIG_MPC824X -ffixed-r2 -ffixed-r29 -mstring -mcpu=603e -msoft-float
+PLATFORM_CPPFLAGS += -DCONFIG_MPC824X -ffixed-r2 -mstring -mcpu=603e -msoft-float
# Use default linker script. Board port can override in board/*/config.mk
LDSCRIPT := $(SRCTREE)/cpu/mpc824x/u-boot.lds
diff --git a/cpu/mpc8260/config.mk b/cpu/mpc8260/config.mk
index 683b6fbf2b2f16f194d8073a2d2248b63829d361..2cb027093b030a0f8fc4d852cbf291206a565903 100644
--- a/cpu/mpc8260/config.mk
+++ b/cpu/mpc8260/config.mk
@@ -23,7 +23,7 @@
PLATFORM_RELFLAGS += -fPIC -ffixed-r14 -meabi
-PLATFORM_CPPFLAGS += -DCONFIG_8260 -DCONFIG_CPM2 -ffixed-r2 -ffixed-r29 \
+PLATFORM_CPPFLAGS += -DCONFIG_8260 -DCONFIG_CPM2 -ffixed-r2 \
-mstring -mcpu=603e -mmultiple
# Use default linker script. Board port can override in board/*/config.mk
diff --git a/cpu/mpc83xx/config.mk b/cpu/mpc83xx/config.mk
index ecf8a60bbefa19441fce6396aa65947e5c52fdc1..2f0f1ce1efbecdec3e721b95733bdfa93b2cd6d8 100644
--- a/cpu/mpc83xx/config.mk
+++ b/cpu/mpc83xx/config.mk
@@ -23,7 +23,7 @@
PLATFORM_RELFLAGS += -fPIC -ffixed-r14 -meabi
PLATFORM_CPPFLAGS += -DCONFIG_MPC83XX -DCONFIG_E300 \
- -ffixed-r2 -ffixed-r29 -msoft-float
+ -ffixed-r2 -msoft-float
# Use default linker script. Board port can override in board/*/config.mk
LDSCRIPT := $(SRCTREE)/cpu/mpc83xx/u-boot.lds
diff --git a/cpu/mpc85xx/config.mk b/cpu/mpc85xx/config.mk
index 61210743490c4afb409e0d2d33c1b4d4c818e29f..f6df702e52697de512a2eb99c9fca04c1c5d748b 100644
--- a/cpu/mpc85xx/config.mk
+++ b/cpu/mpc85xx/config.mk
@@ -23,4 +23,5 @@
PLATFORM_RELFLAGS += -fPIC -ffixed-r14 -meabi
-PLATFORM_CPPFLAGS += -DCONFIG_MPC85xx -DCONFIG_E500 -ffixed-r2 -ffixed-r29 -Wa,-me500 -msoft-float -mno-string
+PLATFORM_CPPFLAGS += -DCONFIG_MPC85xx -DCONFIG_E500 -ffixed-r2 \
+ -Wa,-me500 -msoft-float -mno-string
diff --git a/cpu/mpc86xx/config.mk b/cpu/mpc86xx/config.mk
index 3c54f4ad39f8a13bcedc6ef85ce550a7b301342f..d767269ad3ddd3655398bc7c929672aeb7aa6036 100644
--- a/cpu/mpc86xx/config.mk
+++ b/cpu/mpc86xx/config.mk
@@ -23,4 +23,4 @@
PLATFORM_RELFLAGS += -fPIC -ffixed-r14 -meabi
-PLATFORM_CPPFLAGS += -DCONFIG_MPC86xx -ffixed-r2 -ffixed-r29 -mstring
+PLATFORM_CPPFLAGS += -DCONFIG_MPC86xx -ffixed-r2 -mstring
diff --git a/cpu/mpc86xx/start.S b/cpu/mpc86xx/start.S
index fa9736bce0b69311519264638ec76296f3cbaa45..09f4ceedb573ddb6fc7256b36ac4563f10445499 100644
--- a/cpu/mpc86xx/start.S
+++ b/cpu/mpc86xx/start.S
@@ -723,7 +723,7 @@ relocate_code:
mr r1, r3 /* Set new stack pointer */
mr r9, r4 /* Save copy of Global Data pointer */
- mr r29, r9 /* Save for DECLARE_GLOBAL_DATA_PTR */
+ mr r2, r9 /* Save for DECLARE_GLOBAL_DATA_PTR */
mr r10, r5 /* Save copy of Destination Address */
mr r3, r5 /* Destination Address */
diff --git a/cpu/mpc8xx/config.mk b/cpu/mpc8xx/config.mk
index bfa6625fa8481b567854f5b67d21a45ebdf7312c..6031e7f76af9502e27392a4c1b925a4257ff7deb 100644
--- a/cpu/mpc8xx/config.mk
+++ b/cpu/mpc8xx/config.mk
@@ -23,4 +23,4 @@
PLATFORM_RELFLAGS += -fPIC -ffixed-r14 -meabi -fno-strict-aliasing
-PLATFORM_CPPFLAGS += -DCONFIG_8xx -ffixed-r2 -ffixed-r29 -mstring -mcpu=860 -msoft-float
+PLATFORM_CPPFLAGS += -DCONFIG_8xx -ffixed-r2 -mstring -mcpu=860 -msoft-float
diff --git a/cpu/ppc4xx/config.mk b/cpu/ppc4xx/config.mk
index 4fd510899c59c1c42143804612f8bbf875d89926..311c97b732391f796549f5a205dd8934ec2e7f81 100644
--- a/cpu/ppc4xx/config.mk
+++ b/cpu/ppc4xx/config.mk
@@ -22,7 +22,7 @@
#
PLATFORM_RELFLAGS += -fPIC -ffixed-r14 -meabi -fno-strict-aliasing
-PLATFORM_CPPFLAGS += -DCONFIG_4xx -ffixed-r2 -ffixed-r29 -mstring -msoft-float
+PLATFORM_CPPFLAGS += -DCONFIG_4xx -ffixed-r2 -mstring -msoft-float
cfg=$(shell grep configs $(OBJTREE)/include/config.h | sed 's/.*<\(configs.*\)>/\1/')
is440=$(shell grep CONFIG_440 $(TOPDIR)/include/$(cfg))
diff --git a/doc/README.standalone b/doc/README.standalone
index 39988317ee5971abf7240bf01e641e30aeb71aa3..f9237a65f573a529c62b23769978f5c2dbdcb467 100644
--- a/doc/README.standalone
+++ b/doc/README.standalone
@@ -21,7 +21,7 @@ Design Notes on Exporting U-Boot Functions to Standalone Applications:
2. The pointer to the jump table is passed to the application in a
machine-dependent way. PowerPC, ARM and MIPS architectures use a
dedicated register to hold the pointer to the 'global_data'
- structure: r29 on PowerPC, r8 on ARM and k0 on MIPS. The x86
+ structure: r2 on PowerPC, r8 on ARM and k0 on MIPS. The x86
architecture does not use such a register; instead, the pointer to
the 'global_data' structure is passed as 'argv[-1]' pointer.
diff --git a/examples/stubs.c b/examples/stubs.c
index 571c4d50a437e905a289a177b4a4721e24850b1d..9b3cadde33f997fd4d3f91ff99444ad738edc8a6 100644
--- a/examples/stubs.c
+++ b/examples/stubs.c
@@ -25,14 +25,14 @@ gd_t *global_data;
: : "i"(XF_ ## x * sizeof(void *)) : "eax", "ecx");
#elif defined(CONFIG_PPC)
/*
- * r29 holds the pointer to the global_data, r11 is a call-clobbered
+ * r2 holds the pointer to the global_data, r11 is a call-clobbered
* register
*/
#define EXPORT_FUNC(x) \
asm volatile ( \
" .globl " #x "\n" \
#x ":\n" \
-" lwz %%r11, %0(%%r29)\n" \
+" lwz %%r11, %0(%%r2)\n" \
" lwz %%r11, %1(%%r11)\n" \
" mtctr %%r11\n" \
" bctr\n" \
diff --git a/examples/test_burst_lib.S b/examples/test_burst_lib.S
index 5bb49814284028e7e471d847b53bc1503c805b94..aef4e324224e7dfbb706e404f5e8564a25758b91 100644
--- a/examples/test_burst_lib.S
+++ b/examples/test_burst_lib.S
@@ -70,7 +70,7 @@ mmu_init:
* we can load the instruction and data TLB registers with the
* same values.
*/
- lwz r9,20(r29) /* gd->ram_size */
+ lwz r9,20(r2) /* gd->ram_size */
addis r9,r9,-0x80
mr r8, r9 /* Higher 8 Meg in SDRAM */
diff --git a/examples/x86-testapp.c b/examples/x86-testapp.c
index a1ab319ae885e333ad149642ec0377cfc1eba606..e8603d9bac6047009b5ebabcae920019bd0b2405 100644
--- a/examples/x86-testapp.c
+++ b/examples/x86-testapp.c
@@ -30,11 +30,11 @@ asm volatile ( \
asm volatile ( \
" .globl mon_" #x "\n" \
"mon_" #x ":\n" \
-" lwz %%r11, %0(%%r29)\n" \
+" lwz %%r11, %0(%%r2)\n" \
" lwz %%r11, %1(%%r11)\n" \
" mtctr %%r11\n" \
" bctr\n" \
- : : "i"(offsetof(xxx_t, pfunc)), "i"(XF_ ## x * sizeof(void *)) : "r11", "r29");
+ : : "i"(offsetof(xxx_t, pfunc)), "i"(XF_ ## x * sizeof(void *)) : "r11", "r2");
#elif defined(__arm__)
#define EXPORT_FUNC(x) \
asm volatile ( \
@@ -67,7 +67,7 @@ int main(void)
#if defined(__i386__)
xxx_t *pq;
#elif defined(__powerpc__)
- register volatile xxx_t *pq asm("r29");
+ register volatile xxx_t *pq asm("r2");
#elif defined(__arm__)
register volatile xxx_t *pq asm("r8");
#elif defined(__mips__)
diff --git a/include/asm-ppc/global_data.h b/include/asm-ppc/global_data.h
index aa6384c15249e93e8a534a6a1f6da24d65f4f239..bacd02dad05aebcbf92fd07053030412ddcaa034 100644
--- a/include/asm-ppc/global_data.h
+++ b/include/asm-ppc/global_data.h
@@ -163,7 +163,7 @@ typedef struct global_data {
#define GD_FLG_SILENT 0x00004 /* Silent mode */
#if 1
-#define DECLARE_GLOBAL_DATA_PTR register volatile gd_t *gd asm ("r29")
+#define DECLARE_GLOBAL_DATA_PTR register volatile gd_t *gd asm ("r2")
#else /* We could use plain global data, but the resulting code is bigger */
#define XTRN_DECLARE_GLOBAL_DATA_PTR extern
#define DECLARE_GLOBAL_DATA_PTR XTRN_DECLARE_GLOBAL_DATA_PTR \