powerpc: Move ppc64 boot wrapper code over to arch/powerpc
This also extends the code to handle 32-bit ELF vmlinux files as well
as 64-bit ones. This is sufficient for booting on new-world 32-bit
powermacs (i.e. all recent machines).
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index d41ad2e..99dbea8 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -14,10 +14,6 @@
HAS_BIARCH := $(call cc-option-yn, -m32)
-ifeq ($(CONFIG_PPC64),y)
-OLDARCH := ppc64
-SZ := 64
-
# Set default 32 bits cross compilers for vdso and boot wrapper
CROSS32_COMPILE ?=
@@ -37,6 +33,10 @@
export CROSS32CC CROSS32AS CROSS32LD CROSS32OBJCOPY
+ifeq ($(CONFIG_PPC64),y)
+OLDARCH := ppc64
+SZ := 64
+
new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
ifeq ($(new_nm),y)
@@ -139,7 +139,7 @@
drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/
-defaultimage-$(CONFIG_PPC32) := uImage zImage
+defaultimage-$(CONFIG_PPC32) := zImage
defaultimage-$(CONFIG_PPC_ISERIES) := vmlinux
defaultimage-$(CONFIG_PPC_PSERIES) := zImage
KBUILD_IMAGE := $(defaultimage-y)
@@ -154,23 +154,13 @@
.PHONY: $(BOOT_TARGETS)
-boot := arch/$(OLDARCH)/boot
+boot := arch/$(ARCH)/boot
-# urk
-ifeq ($(CONFIG_PPC64),y)
$(BOOT_TARGETS): vmlinux
$(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
-else
-$(BOOT_TARGETS): vmlinux
- $(Q)$(MAKE) ARCH=ppc $(build)=$(boot) $@
-endif
-
-uImage: vmlinux
- $(Q)$(MAKE) ARCH=$(OLDARCH) $(build)=$(boot)/images $(boot)/images/$@
define archhelp
- @echo '* zImage - Compressed kernel image (arch/$(ARCH)/boot/images/zImage.*)'
- @echo ' uImage - Create a bootable image for U-Boot / PPCBoot'
+ @echo '* zImage - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
@echo ' install - Install kernel using'
@echo ' (your) ~/bin/installkernel or'
@echo ' (distribution) /sbin/installkernel or'
@@ -180,7 +170,6 @@
archclean:
$(Q)$(MAKE) $(clean)=$(boot)
- # Temporary hack until we have migrated to asm-powerpc
$(Q)rm -rf arch/$(ARCH)/include
archprepare: checkbin
diff --git a/arch/ppc64/boot/Makefile b/arch/powerpc/boot/Makefile
similarity index 96%
rename from arch/ppc64/boot/Makefile
rename to arch/powerpc/boot/Makefile
index 301bc15..9770f58 100644
--- a/arch/ppc64/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -22,7 +22,8 @@
HOSTCC := gcc
-BOOTCFLAGS := $(HOSTCFLAGS) -fno-builtin -nostdinc -isystem $(shell $(CROSS32CC) -print-file-name=include) -fPIC
+BOOTCFLAGS := $(HOSTCFLAGS) -fno-builtin -nostdinc -isystem \
+ $(shell $(CROSS32CC) -print-file-name=include) -fPIC
BOOTAFLAGS := -D__ASSEMBLY__ $(BOOTCFLAGS) -traditional -nostdinc
BOOTLFLAGS := -T $(srctree)/$(src)/zImage.lds
OBJCOPYFLAGS := contents,alloc,load,readonly,data
@@ -98,7 +99,7 @@
cmd_ramdisk = $(obj)/addRamDisk $(obj)/ramdisk.image.gz $< $@
quiet_cmd_stripvm = STRIP $@
- cmd_stripvm = $(STRIP) -s $< -o $@
+ cmd_stripvm = $(STRIP) -s -R .comment $< -o $@
vmlinux.strip: vmlinux
$(call if_changed,stripvm)
diff --git a/arch/ppc64/boot/README b/arch/powerpc/boot/README
similarity index 100%
rename from arch/ppc64/boot/README
rename to arch/powerpc/boot/README
diff --git a/arch/ppc64/boot/addRamDisk.c b/arch/powerpc/boot/addRamDisk.c
similarity index 100%
rename from arch/ppc64/boot/addRamDisk.c
rename to arch/powerpc/boot/addRamDisk.c
diff --git a/arch/ppc64/boot/addnote.c b/arch/powerpc/boot/addnote.c
similarity index 100%
rename from arch/ppc64/boot/addnote.c
rename to arch/powerpc/boot/addnote.c
diff --git a/arch/ppc64/boot/crt0.S b/arch/powerpc/boot/crt0.S
similarity index 100%
rename from arch/ppc64/boot/crt0.S
rename to arch/powerpc/boot/crt0.S
diff --git a/arch/ppc64/boot/div64.S b/arch/powerpc/boot/div64.S
similarity index 100%
rename from arch/ppc64/boot/div64.S
rename to arch/powerpc/boot/div64.S
diff --git a/arch/ppc64/boot/elf.h b/arch/powerpc/boot/elf.h
similarity index 100%
rename from arch/ppc64/boot/elf.h
rename to arch/powerpc/boot/elf.h
diff --git a/arch/ppc64/boot/install.sh b/arch/powerpc/boot/install.sh
similarity index 100%
rename from arch/ppc64/boot/install.sh
rename to arch/powerpc/boot/install.sh
diff --git a/arch/ppc64/boot/main.c b/arch/powerpc/boot/main.c
similarity index 77%
rename from arch/ppc64/boot/main.c
rename to arch/powerpc/boot/main.c
index e0dde24..64ec931 100644
--- a/arch/ppc64/boot/main.c
+++ b/arch/powerpc/boot/main.c
@@ -42,6 +42,8 @@
static struct addr_range vmlinuz;
static struct addr_range initrd;
+static unsigned long elfoffset;
+
static char scratch[46912]; /* scratch space for gunzip, from zlib_inflate_workspacesize() */
static char elfheader[256];
@@ -131,13 +133,70 @@
return addr;
}
+static int is_elf64(void *hdr)
+{
+ Elf64_Ehdr *elf64 = hdr;
+ Elf64_Phdr *elf64ph;
+ unsigned int i;
+
+ if (!(elf64->e_ident[EI_MAG0] == ELFMAG0 &&
+ elf64->e_ident[EI_MAG1] == ELFMAG1 &&
+ elf64->e_ident[EI_MAG2] == ELFMAG2 &&
+ elf64->e_ident[EI_MAG3] == ELFMAG3 &&
+ elf64->e_ident[EI_CLASS] == ELFCLASS64 &&
+ elf64->e_ident[EI_DATA] == ELFDATA2MSB &&
+ elf64->e_type == ET_EXEC &&
+ elf64->e_machine == EM_PPC64))
+ return 0;
+
+ elf64ph = (Elf64_Phdr *)((unsigned long)elf64 +
+ (unsigned long)elf64->e_phoff);
+ for (i = 0; i < (unsigned int)elf64->e_phnum; i++, elf64ph++)
+ if (elf64ph->p_type == PT_LOAD && elf64ph->p_offset != 0)
+ break;
+ if (i >= (unsigned int)elf64->e_phnum)
+ return 0;
+
+ elfoffset = (unsigned long)elf64ph->p_offset;
+ vmlinux.size = (unsigned long)elf64ph->p_filesz + elfoffset;
+ vmlinux.memsize = (unsigned long)elf64ph->p_memsz + elfoffset;
+ return 1;
+}
+
+static int is_elf32(void *hdr)
+{
+ Elf32_Ehdr *elf32 = hdr;
+ Elf32_Phdr *elf32ph;
+ unsigned int i;
+
+ if (!(elf32->e_ident[EI_MAG0] == ELFMAG0 &&
+ elf32->e_ident[EI_MAG1] == ELFMAG1 &&
+ elf32->e_ident[EI_MAG2] == ELFMAG2 &&
+ elf32->e_ident[EI_MAG3] == ELFMAG3 &&
+ elf32->e_ident[EI_CLASS] == ELFCLASS32 &&
+ elf32->e_ident[EI_DATA] == ELFDATA2MSB &&
+ elf32->e_type == ET_EXEC &&
+ elf32->e_machine == EM_PPC))
+ return 0;
+
+ elf32 = (Elf32_Ehdr *)elfheader;
+ elf32ph = (Elf32_Phdr *) ((unsigned long)elf32 + elf32->e_phoff);
+ for (i = 0; i < elf32->e_phnum; i++, elf32ph++)
+ if (elf32ph->p_type == PT_LOAD && elf32ph->p_offset != 0)
+ break;
+ if (i >= elf32->e_phnum)
+ return 0;
+
+ elfoffset = elf32ph->p_offset;
+ vmlinux.size = elf32ph->p_filesz + elf32ph->p_offset;
+ vmlinux.memsize = elf32ph->p_memsz + elf32ph->p_offset;
+ return 1;
+}
+
void start(unsigned long a1, unsigned long a2, void *promptr, void *sp)
{
- unsigned long i;
int len;
kernel_entry_t kernel_entry;
- Elf64_Ehdr *elf64;
- Elf64_Phdr *elf64ph;
memset(__bss_start, 0, _end - __bss_start);
@@ -153,6 +212,22 @@
printf("\n\rzImage starting: loaded at 0x%p (sp: 0x%p)\n\r", _start, sp);
+ vmlinuz.addr = (unsigned long)_vmlinux_start;
+ vmlinuz.size = (unsigned long)(_vmlinux_end - _vmlinux_start);
+
+ /* gunzip the ELF header of the kernel */
+ if (*(unsigned short *)vmlinuz.addr == 0x1f8b) {
+ len = vmlinuz.size;
+ gunzip(elfheader, sizeof(elfheader),
+ (unsigned char *)vmlinuz.addr, &len);
+ } else
+ memcpy(elfheader, (const void *)vmlinuz.addr, sizeof(elfheader));
+
+ if (!is_elf64(elfheader) && !is_elf32(elfheader)) {
+ printf("Error: not a valid PPC32 or PPC64 ELF file!\n\r");
+ exit();
+ }
+
/*
* The first available claim_base must be above the end of the
* the loaded kernel wrapper file (_start to _end includes the
@@ -172,46 +247,11 @@
claim_base = PROG_START;
#endif
- vmlinuz.addr = (unsigned long)_vmlinux_start;
- vmlinuz.size = (unsigned long)(_vmlinux_end - _vmlinux_start);
-
- /* gunzip the ELF header of the kernel */
- if (*(unsigned short *)vmlinuz.addr == 0x1f8b) {
- len = vmlinuz.size;
- gunzip(elfheader, sizeof(elfheader),
- (unsigned char *)vmlinuz.addr, &len);
- } else
- memcpy(elfheader, (const void *)vmlinuz.addr, sizeof(elfheader));
-
- elf64 = (Elf64_Ehdr *)elfheader;
- if ( elf64->e_ident[EI_MAG0] != ELFMAG0 ||
- elf64->e_ident[EI_MAG1] != ELFMAG1 ||
- elf64->e_ident[EI_MAG2] != ELFMAG2 ||
- elf64->e_ident[EI_MAG3] != ELFMAG3 ||
- elf64->e_ident[EI_CLASS] != ELFCLASS64 ||
- elf64->e_ident[EI_DATA] != ELFDATA2MSB ||
- elf64->e_type != ET_EXEC ||
- elf64->e_machine != EM_PPC64 )
- {
- printf("Error: not a valid PPC64 ELF file!\n\r");
- exit();
- }
-
- elf64ph = (Elf64_Phdr *)((unsigned long)elf64 +
- (unsigned long)elf64->e_phoff);
- for(i=0; i < (unsigned int)elf64->e_phnum ;i++,elf64ph++) {
- if (elf64ph->p_type == PT_LOAD && elf64ph->p_offset != 0)
- break;
- }
- vmlinux.size = (unsigned long)elf64ph->p_filesz +
- (unsigned long)elf64ph->p_offset;
/* We need to claim the memsize plus the file offset since gzip
* will expand the header (file offset), then the kernel, then
* possible rubbish we don't care about. But the kernel bss must
* be claimed (it will be zero'd by the kernel itself)
*/
- vmlinux.memsize = (unsigned long)elf64ph->p_memsz +
- (unsigned long)elf64ph->p_offset;
printf("Allocating 0x%lx bytes for kernel ...\n\r", vmlinux.memsize);
vmlinux.addr = try_claim(vmlinux.memsize);
if (vmlinux.addr == 0) {
@@ -254,9 +294,9 @@
/* Skip over the ELF header */
#ifdef DEBUG
printf("... skipping 0x%lx bytes of ELF header\n\r",
- (unsigned long)elf64ph->p_offset);
+ elfoffset);
#endif
- vmlinux.addr += (unsigned long)elf64ph->p_offset;
+ vmlinux.addr += elfoffset;
flush_cache((void *)vmlinux.addr, vmlinux.size);
@@ -272,7 +312,7 @@
(unsigned long)prom, NULL);
#endif
- kernel_entry( a1, a2, prom, NULL );
+ kernel_entry(a1, a2, prom, NULL);
printf("Error: Linux kernel returned to zImage bootloader!\n\r");
diff --git a/arch/ppc64/boot/page.h b/arch/powerpc/boot/page.h
similarity index 100%
rename from arch/ppc64/boot/page.h
rename to arch/powerpc/boot/page.h
diff --git a/arch/ppc64/boot/ppc_asm.h b/arch/powerpc/boot/ppc_asm.h
similarity index 100%
rename from arch/ppc64/boot/ppc_asm.h
rename to arch/powerpc/boot/ppc_asm.h
diff --git a/arch/ppc64/boot/prom.c b/arch/powerpc/boot/prom.c
similarity index 100%
rename from arch/ppc64/boot/prom.c
rename to arch/powerpc/boot/prom.c
diff --git a/arch/ppc64/boot/prom.h b/arch/powerpc/boot/prom.h
similarity index 100%
rename from arch/ppc64/boot/prom.h
rename to arch/powerpc/boot/prom.h
diff --git a/arch/ppc64/boot/stdio.h b/arch/powerpc/boot/stdio.h
similarity index 100%
rename from arch/ppc64/boot/stdio.h
rename to arch/powerpc/boot/stdio.h
diff --git a/arch/ppc64/boot/string.S b/arch/powerpc/boot/string.S
similarity index 100%
rename from arch/ppc64/boot/string.S
rename to arch/powerpc/boot/string.S
diff --git a/arch/ppc64/boot/string.h b/arch/powerpc/boot/string.h
similarity index 100%
rename from arch/ppc64/boot/string.h
rename to arch/powerpc/boot/string.h
diff --git a/arch/ppc64/boot/zImage.lds b/arch/powerpc/boot/zImage.lds
similarity index 100%
rename from arch/ppc64/boot/zImage.lds
rename to arch/powerpc/boot/zImage.lds
