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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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35af89eb49
This makes 2 changes to clean up the flat device tree handling logic in the zImage wrapper. First, there were two callbacks from the dt_ops structure used for producing a final flat tree to pass to the kerne: dt_ops.ft_pack() which packed the flat tree (possibly a no-op) and dt_ops.ft_addr() which retreived the address of the final blob. Since they were only ever called together, this patch combines the two into a single new callback, dt_ops.finalize(). This new callback does whatever platform-dependent things are necessary to produce a final flat device tree blob, and returns the blob's addres. Second, the current logic calls the kernel with a flat device tree if one is build into the zImage wrapper, otherwise it boots the kernel with a PROM pointer, expecting the kernel to copy the OF device tree itself. This approach precludes the possibility of the platform wrapper code building a flat device tree from whatever platform-specific information firmware provides. Thus, this patch takes the more sensible approach of invoking the kernel with a flat tree if the dt_ops.finalize callback provides one (by whatever means). So, the dt_ops.finalize callback can be NULL, or can be a function which returns NULL. In either case, the zImage wrapper logic assumes that this is a platform with OF and invokes the kernel accordingly. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org> |
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| .. | ||
| dts | ||
| .gitignore | ||
| addnote.c | ||
| addRamDisk.c | ||
| crt0.S | ||
| div64.S | ||
| dummy.c | ||
| elf.h | ||
| flatdevtree_env.h | ||
| flatdevtree_misc.c | ||
| flatdevtree.c | ||
| flatdevtree.h | ||
| hack-coff.c | ||
| install.sh | ||
| io.h | ||
| main.c | ||
| Makefile | ||
| mktree.c | ||
| ns16550.c | ||
| of.c | ||
| ops.h | ||
| page.h | ||
| ppc_asm.h | ||
| README | ||
| rs6000.h | ||
| serial.c | ||
| simple_alloc.c | ||
| stdio.c | ||
| stdio.h | ||
| string.h | ||
| string.S | ||
| types.h | ||
| util.S | ||
| wrapper | ||
| zImage.coff.lds.S | ||
| zImage.lds.S | ||
To extract the kernel vmlinux, System.map, .config or initrd from the zImage binary: objcopy -j .kernel:vmlinux -O binary zImage vmlinux.gz objcopy -j .kernel:System.map -O binary zImage System.map.gz objcopy -j .kernel:.config -O binary zImage config.gz objcopy -j .kernel:initrd -O binary zImage.initrd initrd.gz Peter