6263203ed6
Add the concept of a gang to spufs as a new type of object. So far, this has no impact whatsover on scheduling, but makes it possible to add that later. A new type of object in spufs is now a spu_gang. It is created with the spu_create system call with the flags argument set to SPU_CREATE_GANG (0x2). Inside of a spu_gang, it is then possible to create spu_context objects, which until now was only possible at the root of spufs. There is a new member in struct spu_context pointing to the spu_gang it belongs to, if any. The spu_gang maintains a list of spu_context structures that are its children. This information can then be used in the scheduler in the future. There is still a bug that needs to be resolved in this basic infrastructure regarding the order in which objects are removed. When the spu_gang file descriptor is closed before the spu_context descriptors, we leak the dentry and inode for the gang. Any ideas how to cleanly solve this are appreciated. Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
60 lines
1.8 KiB
Makefile
60 lines
1.8 KiB
Makefile
obj-y += switch.o
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obj-$(CONFIG_SPU_FS) += spufs.o
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spufs-y += inode.o file.o context.o syscalls.o
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spufs-y += sched.o backing_ops.o hw_ops.o run.o gang.o
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# Rules to build switch.o with the help of SPU tool chain
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SPU_CROSS := spu-
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SPU_CC := $(SPU_CROSS)gcc
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SPU_AS := $(SPU_CROSS)gcc
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SPU_LD := $(SPU_CROSS)ld
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SPU_OBJCOPY := $(SPU_CROSS)objcopy
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SPU_CFLAGS := -O2 -Wall -I$(srctree)/include \
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-I$(objtree)/include2 -D__KERNEL__
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SPU_AFLAGS := -c -D__ASSEMBLY__ -I$(srctree)/include \
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-I$(objtree)/include2 -D__KERNEL__
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SPU_LDFLAGS := -N -Ttext=0x0
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$(obj)/switch.o: $(obj)/spu_save_dump.h $(obj)/spu_restore_dump.h
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clean-files := spu_save_dump.h spu_restore_dump.h
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# Compile SPU files
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cmd_spu_cc = $(SPU_CC) $(SPU_CFLAGS) -c -o $@ $<
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quiet_cmd_spu_cc = SPU_CC $@
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$(obj)/spu_%.o: $(src)/spu_%.c
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$(call if_changed,spu_cc)
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# Assemble SPU files
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cmd_spu_as = $(SPU_AS) $(SPU_AFLAGS) -o $@ $<
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quiet_cmd_spu_as = SPU_AS $@
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$(obj)/spu_%.o: $(src)/spu_%.S
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$(call if_changed,spu_as)
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# Link SPU Executables
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cmd_spu_ld = $(SPU_LD) $(SPU_LDFLAGS) -o $@ $^
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quiet_cmd_spu_ld = SPU_LD $@
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$(obj)/spu_%: $(obj)/spu_%_crt0.o $(obj)/spu_%.o
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$(call if_changed,spu_ld)
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# Copy into binary format
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cmd_spu_objcopy = $(SPU_OBJCOPY) -O binary $< $@
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quiet_cmd_spu_objcopy = OBJCOPY $@
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$(obj)/spu_%.bin: $(src)/spu_%
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$(call if_changed,spu_objcopy)
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# create C code from ELF executable
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cmd_hexdump = ( \
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echo "/*" ; \
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echo " * $*_dump.h: Copyright (C) 2005 IBM." ; \
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echo " * Hex-dump auto generated from $*.c." ; \
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echo " * Do not edit!" ; \
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echo " */" ; \
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echo "static unsigned int $*_code[] " \
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"__attribute__((__aligned__(128))) = {" ; \
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hexdump -v -e '"0x" 4/1 "%02x" "," "\n"' $< ; \
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echo "};" ; \
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) > $@
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quiet_cmd_hexdump = HEXDUMP $@
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$(obj)/%_dump.h: $(obj)/%.bin
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$(call if_changed,hexdump)
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