diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index 3628d868184424222bc03489ad095935da9a5f30..b1fc029e5ea76aff1a275034ed41136fe4a0830a 100644
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -40,11 +40,11 @@ zliblinuxheader := zlib.h zconf.h zutil.h
$(addprefix $(obj)/,$(zlib) main.o): $(addprefix $(obj)/,$(zliblinuxheader)) \
$(addprefix $(obj)/,$(zlibheader))
-src-wlib := string.S stdio.c main.c flatdevtree.c flatdevtree_misc.c \
+src-wlib := string.S crt0.S stdio.c main.c flatdevtree.c flatdevtree_misc.c \
ns16550.c serial.c simple_alloc.c div64.S util.S \
gunzip_util.c $(zlib)
src-plat := of.c
-src-boot := crt0.S $(src-wlib) $(src-plat) empty.c
+src-boot := $(src-wlib) $(src-plat) empty.c
src-boot := $(addprefix $(obj)/, $(src-boot))
obj-boot := $(addsuffix .o, $(basename $(src-boot)))
@@ -97,7 +97,7 @@ $(obj)/wrapper.a: $(obj-wlib)
hostprogs-y := addnote addRamDisk hack-coff mktree
-extra-y := $(obj)/crt0.o $(obj)/wrapper.a $(obj-plat) $(obj)/empty.o \
+extra-y := $(obj)/wrapper.a $(obj-plat) $(obj)/empty.o \
$(obj)/zImage.lds $(obj)/zImage.coff.lds
wrapper :=$(srctree)/$(src)/wrapper
diff --git a/arch/powerpc/boot/crt0.S b/arch/powerpc/boot/crt0.S
index 70e65b13e0336fd86c02f3c602181be94c3ae3e0..3dc8d8f784998746693a1529e5085cce32eaf024 100644
--- a/arch/powerpc/boot/crt0.S
+++ b/arch/powerpc/boot/crt0.S
@@ -16,6 +16,7 @@
_zimage_start_opd:
.long _zimage_start, 0, 0, 0
+ .weak _zimage_start
.globl _zimage_start
_zimage_start:
/* Work out the offset between the address we were linked at
@@ -44,7 +45,7 @@ _zimage_start:
addi r9,r9,4
bdnz 2b
- /* Do a cache flush for our text, in case OF didn't */
+ /* Do a cache flush for our text, in case the loader didn't */
3: lis r9,_start@ha
addi r9,r9,_start@l
add r9,r0,r9
@@ -59,6 +60,31 @@ _zimage_start:
sync
isync
- mr r6,r1
- b start
+ /* Clear the BSS */
+ lis r9,__bss_start@ha
+ addi r9,r9,__bss_start@l
+ lis r8,_end@ha
+ addi r8,r8,_end@l
+ li r0,0
+5: stw r0,0(r9)
+ addi r9,r9,4
+ cmplw cr0,r9,r8
+ blt 5b
+ /* Possibly set up a custom stack */
+.weak _platform_stack_top
+ lis r8,_platform_stack_top@ha
+ addi r8,r8,_platform_stack_top@l
+ cmpwi r8,0
+ beq 6f
+ lwz r1,0(r8)
+ li r0,0
+ stwu r0,-16(r1) /* establish a stack frame */
+6:
+
+ /* Call platform_init() */
+ bl platform_init
+
+ /* Call start */
+ mr r3,r1
+ b start
diff --git a/arch/powerpc/boot/main.c b/arch/powerpc/boot/main.c
index 05de6cfafeeb546f51aecd4e618a94e679783f6d..8a60e13777d793c4a4211f07220fb01f81062a0f 100644
--- a/arch/powerpc/boot/main.c
+++ b/arch/powerpc/boot/main.c
@@ -254,21 +254,15 @@ static void set_cmdline(char *buf)
struct platform_ops platform_ops;
struct dt_ops dt_ops;
struct console_ops console_ops;
+struct loader_info loader_info;
-void start(unsigned long a1, unsigned long a2, void *promptr, void *sp)
+void start(void *sp)
{
struct addr_range vmlinux, initrd;
kernel_entry_t kentry;
char cmdline[COMMAND_LINE_SIZE];
unsigned long ft_addr = 0;
- memset(__bss_start, 0, _end - __bss_start);
- memset(&platform_ops, 0, sizeof(platform_ops));
- memset(&dt_ops, 0, sizeof(dt_ops));
- memset(&console_ops, 0, sizeof(console_ops));
-
- if (platform_init(promptr, _dtb_start, _dtb_end))
- exit();
if (console_ops.open && (console_ops.open() < 0))
exit();
if (platform_ops.fixups)
@@ -278,7 +272,8 @@ void start(unsigned long a1, unsigned long a2, void *promptr, void *sp)
_start, sp);
vmlinux = prep_kernel();
- initrd = prep_initrd(vmlinux, a1, a2);
+ initrd = prep_initrd(vmlinux, loader_info.initrd_addr,
+ loader_info.initrd_size);
/* If cmdline came from zimage wrapper or if we can edit the one
* in the dt, print it out and edit it, if possible.
@@ -298,7 +293,7 @@ void start(unsigned long a1, unsigned long a2, void *promptr, void *sp)
if (ft_addr)
printf(" flat tree at 0x%lx\n\r", ft_addr);
else
- printf(" using OF tree (promptr=%p)\n\r", promptr);
+ printf(" using OF tree (promptr=%p)\n\r", loader_info.promptr);
if (console_ops.close)
console_ops.close();
@@ -307,7 +302,8 @@ void start(unsigned long a1, unsigned long a2, void *promptr, void *sp)
if (ft_addr)
kentry(ft_addr, 0, NULL);
else
- kentry((unsigned long)initrd.addr, initrd.size, promptr);
+ kentry((unsigned long)initrd.addr, initrd.size,
+ loader_info.promptr);
/* console closed so printf below may not work */
printf("Error: Linux kernel returned to zImage boot wrapper!\n\r");
diff --git a/arch/powerpc/boot/of.c b/arch/powerpc/boot/of.c
index 044f34770b9685633532bc716020e2cbe51a6ae0..c6f0d9701485cf8d5b5b3f90fbf13e5b72acb751 100644
--- a/arch/powerpc/boot/of.c
+++ b/arch/powerpc/boot/of.c
@@ -267,7 +267,7 @@ static void of_console_write(char *buf, int len)
call_prom("write", 3, 1, of_stdout_handle, buf, len);
}
-int platform_init(void *promptr, char *dt_blob_start, char *dt_blob_end)
+void platform_init(unsigned long a1, unsigned long a2, void *promptr)
{
platform_ops.image_hdr = of_image_hdr;
platform_ops.malloc = of_try_claim;
@@ -282,5 +282,7 @@ int platform_init(void *promptr, char *dt_blob_start, char *dt_blob_end)
console_ops.write = of_console_write;
prom = (int (*)(void *))promptr;
- return 0;
+ loader_info.promptr = promptr;
+ loader_info.initrd_addr = a1;
+ loader_info.initrd_size = a2;
}
diff --git a/arch/powerpc/boot/ops.h b/arch/powerpc/boot/ops.h
index fa62ff223e70e9554777279419d5d47b46621195..cad4eee599fbf824c33b582936ff9f1502f881c0 100644
--- a/arch/powerpc/boot/ops.h
+++ b/arch/powerpc/boot/ops.h
@@ -59,7 +59,13 @@ struct serial_console_data {
void (*close)(void);
};
-int platform_init(void *promptr, char *dt_blob_start, char *dt_blob_end);
+struct loader_info {
+ void *promptr;
+ unsigned long initrd_addr, initrd_size;
+};
+extern struct loader_info loader_info;
+
+void start(void *sp);
int ft_init(void *dt_blob, unsigned int max_size, unsigned int max_find_device);
int serial_console_init(void);
int ns16550_console_init(void *devp, struct serial_console_data *scdp);
@@ -100,4 +106,8 @@ static inline void exit(void)
for(;;);
}
+#define BSS_STACK(size) \
+ static char _bss_stack[size]; \
+ void *_platform_stack_top = _bss_stack + sizeof(_bss_stack);
+
#endif /* _PPC_BOOT_OPS_H_ */
diff --git a/arch/powerpc/boot/wrapper b/arch/powerpc/boot/wrapper
index 024e4d425c596b30fd9b31817d0dbc2bb0a4a990..157d8c89e1386915f85351f1db836aff494a2366 100755
--- a/arch/powerpc/boot/wrapper
+++ b/arch/powerpc/boot/wrapper
@@ -191,7 +191,7 @@ fi
if [ "$platform" != "miboot" ]; then
${CROSS}ld -m elf32ppc -T $lds -o "$ofile" \
- $object/crt0.o $platformo $tmp $object/wrapper.a
+ $platformo $tmp $object/wrapper.a
rm $tmp
fi
@@ -201,7 +201,9 @@ pseries|chrp)
$object/addnote "$ofile"
;;
pmaccoff)
- ${CROSS}objcopy -O aixcoff-rs6000 --set-start 0x500000 "$ofile"
+ entry=`objdump -f "$ofile" | grep '^start address ' | \
+ cut -d' ' -f3`
+ ${CROSS}objcopy -O aixcoff-rs6000 --set-start "$entry" "$ofile"
$object/hack-coff "$ofile"
;;
esac
diff --git a/arch/powerpc/boot/zImage.coff.lds.S b/arch/powerpc/boot/zImage.coff.lds.S
index a360905e54282b7908e55203d538dfb730746030..fe87a90ce7f1a606bba00f50597ac9677757598c 100644
--- a/arch/powerpc/boot/zImage.coff.lds.S
+++ b/arch/powerpc/boot/zImage.coff.lds.S
@@ -1,5 +1,6 @@
OUTPUT_ARCH(powerpc:common)
-ENTRY(_start)
+ENTRY(_zimage_start_opd)
+EXTERN(_zimage_start_opd)
SECTIONS
{
. = (5*1024*1024);
diff --git a/arch/powerpc/boot/zImage.lds.S b/arch/powerpc/boot/zImage.lds.S
index 4be3c6414b04d683ff015ff6cc2648da62fb0ee7..f6e380fdb388903a01394c1643f3a7b71ae2c455 100644
--- a/arch/powerpc/boot/zImage.lds.S
+++ b/arch/powerpc/boot/zImage.lds.S
@@ -1,5 +1,6 @@
OUTPUT_ARCH(powerpc:common)
ENTRY(_zimage_start)
+EXTERN(_zimage_start)
SECTIONS
{
. = (4*1024*1024);