Commit d2477b5c authored by Grant Likely's avatar Grant Likely Committed by Josh Boyer

[POWERPC] bootwrapper: Add a firmware-independent simpleboot target.

This target produces a flat binary rather than an ELF file,
fixes the entry point at the beginning of the image, and takes
a complete device tree with no fixups needed.
Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
Signed-off-by: default avatarJosh Boyer <jwboyer@linux.vnet.ibm.com>
parent 19a74263
......@@ -40,6 +40,7 @@ $(obj)/ebony.o: BOOTCFLAGS += -mcpu=405
$(obj)/cuboot-taishan.o: BOOTCFLAGS += -mcpu=405
$(obj)/cuboot-katmai.o: BOOTCFLAGS += -mcpu=405
$(obj)/treeboot-walnut.o: BOOTCFLAGS += -mcpu=405
$(obj)/virtex405-head.o: BOOTCFLAGS += -mcpu=405
zlib := inffast.c inflate.c inftrees.c
......@@ -64,7 +65,8 @@ src-plat := of.c cuboot-52xx.c cuboot-824x.c cuboot-83xx.c cuboot-85xx.c holly.c
cuboot-bamboo.c cuboot-mpc7448hpc2.c cuboot-taishan.c \
fixed-head.S ep88xc.c ep405.c \
cuboot-katmai.c cuboot-rainier.c redboot-8xx.c ep8248e.c \
cuboot-warp.c cuboot-85xx-cpm2.c cuboot-yosemite.c
cuboot-warp.c cuboot-85xx-cpm2.c cuboot-yosemite.c simpleboot.c \
virtex405-head.S
src-boot := $(src-wlib) $(src-plat) empty.c
src-boot := $(addprefix $(obj)/, $(src-boot))
......@@ -307,6 +309,12 @@ $(obj)/uImage: vmlinux $(wrapperbits)
$(obj)/cuImage.%: vmlinux $(obj)/%.dtb $(wrapperbits)
$(call if_changed,wrap,cuboot-$*,,$(obj)/$*.dtb)
$(obj)/simpleImage.initrd.%: vmlinux $(obj)/%.dtb $(wrapperbits)
$(call if_changed,wrap,simpleboot-$*,,$(obj)/$*.dtb,$(obj)/ramdisk.image.gz)
$(obj)/simpleImage.%: vmlinux $(obj)/%.dtb $(wrapperbits)
$(call if_changed,wrap,simpleboot-$*,,$(obj)/$*.dtb)
$(obj)/treeImage.initrd.%: vmlinux $(obj)/%.dtb $(wrapperbits)
$(call if_changed,wrap,treeboot-$*,,$(obj)/$*.dtb,$(obj)/ramdisk.image.gz)
......
/*
* The simple platform -- for booting when firmware doesn't supply a device
* tree or any platform configuration information.
* All data is extracted from an embedded device tree
* blob.
*
* Authors: Scott Wood <scottwood@freescale.com>
* Grant Likely <grant.likely@secretlab.ca>
*
* Copyright (c) 2007 Freescale Semiconductor, Inc.
* Copyright (c) 2008 Secret Lab Technologies Ltd.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*/
#include "ops.h"
#include "types.h"
#include "io.h"
#include "stdio.h"
#include "libfdt/libfdt.h"
BSS_STACK(4*1024);
void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7)
{
const u32 *na, *ns, *reg, *timebase;
u64 memsize64;
int node, size, i;
/* Make sure FDT blob is sane */
if (fdt_check_header(_dtb_start) != 0)
fatal("Invalid device tree blob\n");
/* Find the #address-cells and #size-cells properties */
node = fdt_path_offset(_dtb_start, "/");
if (node < 0)
fatal("Cannot find root node\n");
na = fdt_getprop(_dtb_start, node, "#address-cells", &size);
if (!na || (size != 4))
fatal("Cannot find #address-cells property");
ns = fdt_getprop(_dtb_start, node, "#size-cells", &size);
if (!ns || (size != 4))
fatal("Cannot find #size-cells property");
/* Find the memory range */
node = fdt_node_offset_by_prop_value(_dtb_start, -1, "device_type",
"memory", sizeof("memory"));
if (node < 0)
fatal("Cannot find memory node\n");
reg = fdt_getprop(_dtb_start, node, "reg", &size);
if (size < (*na+*ns) * sizeof(u32))
fatal("cannot get memory range\n");
/* Only interested in memory based at 0 */
for (i = 0; i < *na; i++)
if (*reg++ != 0)
fatal("Memory range is not based at address 0\n");
/* get the memsize and trucate it to under 4G on 32 bit machines */
memsize64 = 0;
for (i = 0; i < *ns; i++)
memsize64 = (memsize64 << 32) | *reg++;
if (sizeof(void *) == 4 && memsize64 >= 0x100000000ULL)
memsize64 = 0xffffffff;
/* finally, setup the timebase */
node = fdt_node_offset_by_prop_value(_dtb_start, -1, "device_type",
"cpu", sizeof("cpu"));
if (!node)
fatal("Cannot find cpu node\n");
timebase = fdt_getprop(_dtb_start, node, "timebase-frequency", &size);
if (timebase && (size == 4))
timebase_period_ns = 1000000000 / *timebase;
/* Now we have the memory size; initialize the heap */
simple_alloc_init(_end, memsize64 - (unsigned long)_end, 32, 64);
/* prepare the device tree and find the console */
fdt_init(_dtb_start);
serial_console_init();
}
#include "ppc_asm.h"
.text
.global _zimage_start
_zimage_start:
/* PPC errata 213: needed by Virtex-4 FX */
mfccr0 0
oris 0,0,0x50000000@h
mtccr0 0
/*
* Invalidate the data cache if the data cache is turned off.
* - The 405 core does not invalidate the data cache on power-up
* or reset but does turn off the data cache. We cannot assume
* that the cache contents are valid.
* - If the data cache is turned on this must have been done by
* a bootloader and we assume that the cache contents are
* valid.
*/
mfdccr r9
cmplwi r9,0
bne 2f
lis r9,0
li r8,256
mtctr r8
1: dccci r0,r9
addi r9,r9,0x20
bdnz 1b
2: b _zimage_start_lib
......@@ -199,6 +199,10 @@ adder875-redboot)
platformo="$object/fixed-head.o $object/redboot-8xx.o"
binary=y
;;
simpleboot-virtex405-*)
platformo="$object/virtex405-head.o $object/simpleboot.o"
binary=y
;;
esac
vmz="$tmpdir/`basename \"$kernel\"`.$ext"
......
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