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| author | Wolfgang Denk <wd@denx.de> | 2008-02-14 22:43:22 +0100 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2008-02-14 22:43:22 +0100 |
| commit | e7670f6c1e52ae6d2a43ff75a8bcfa7a5c86e47b (patch) | |
| tree | c105ae64bb203f93e670ef11b3256a4a3086c0ad /examples | |
| parent | 3c234efa693bc59906c2be55c7918ecbb55392ea (diff) | |
| download | u-boot-e7670f6c1e52ae6d2a43ff75a8bcfa7a5c86e47b.zip u-boot-e7670f6c1e52ae6d2a43ff75a8bcfa7a5c86e47b.tar.gz u-boot-e7670f6c1e52ae6d2a43ff75a8bcfa7a5c86e47b.tar.bz2 | |
PPC: Use r2 instead of r29 as global data pointer
R29 was an unlucky choice as with recent toolchains (gcc-4.2.x) gcc
will refuse to use load/store multiple insns; instead, it issues a
list of simple load/store instructions upon function entry and exit,
resulting in bigger code size, which in turn makes the build for a
few boards fail.
Use r2 instead.
Signed-off-by: Wolfgang Denk <wd@denx.de>
Diffstat (limited to 'examples')
| -rw-r--r-- | examples/stubs.c | 4 | ||||
| -rw-r--r-- | examples/test_burst_lib.S | 2 | ||||
| -rw-r--r-- | examples/x86-testapp.c | 6 |
3 files changed, 6 insertions, 6 deletions
diff --git a/examples/stubs.c b/examples/stubs.c index 571c4d5..9b3cadd 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 5bb4981..aef4e32 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 a1ab319..e8603d9 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__) |