kernel.git/arch/powerpc/kernel/prom.c, branch linux-2.6.34.y

powerpc: Dynamically allocate pacas

2010-03-09T00:52:52Z

On 64-bit kernels we currently have a 512 byte struct paca_struct for each cpu (usually just called "the paca"). Currently they are statically allocated, which means a kernel built for a large number of cpus will waste a lot of space if it's booted on a machine with few cpus. We can avoid that by only allocating the number of pacas we need at boot. However this is complicated by the fact that we need to access the paca before we know how many cpus there are in the system. The solution is to dynamically allocate enough space for NR_CPUS pacas, but then later in boot when we know how many cpus we have, we free any unused pacas. Signed-off-by: Michael Ellerman Signed-off-by: Benjamin Herrenschmidt

of: move definition of of_chosen into common code.

2010-02-14T14:13:55Z

Rather than defining of_chosen in each arch, it can be defined for all in driver/of/base.c Signed-off-by: Grant Likely Acked-by: Benjamin Herrenschmidt Acked-by: Michal Simek

of: remove unused extern reference to devtree_lock

2010-02-14T14:13:52Z

Neither the powerpc nor the microblaze code use devtree_lock anymore. Remove the extern reference. Signed-off-by: Grant Likely Acked-by: Benjamin Herrenschmidt Acked-by: Michal Simek

of/flattree: Don't assume HAVE_LMB

2010-02-14T14:13:47Z

We don't always have lmb available, so make arches provide an early_init_dt_alloc_memory_arch() to handle the allocation of memory in the fdt code. When we don't have lmb.h included, we need asm/page.h for __va. Signed-off-by: Jeremy Kerr Signed-off-by: Grant Likely Acked-by: Benjamin Herrenschmidt Acked-by: Michal Simek

of/flattree: endian-convert members of boot_param_header

2010-02-09T15:34:10Z

The boot_param_header has big-endian fields, so change the types to __be32, and perform endian conversion when we access them. Signed-off-by: Jeremy Kerr Signed-off-by: Grant Likely

of/flattree: use callback to setup initrd from /chosen

2010-02-09T15:34:10Z

At present, the fdt code sets the kernel-wide initrd_start and initrd_end variables when parsing /chosen. On ARM, we only set these once the bootmem has been reserved. This change adds an arch hook to setup the initrd from the device tree: void early_init_dt_setup_initrd_arch(unsigned long start, unsigned long end); The arch-specific code can then setup the initrd however it likes. Compiled on powerpc, with CONFIG_BLK_DEV_INITRD=y and =n. Signed-off-by: Jeremy Kerr Signed-off-by: Grant Likely

of/flattree: merge early_init_dt_scan_memory() common code

2010-02-09T15:33:10Z

Merge common code between PowerPC and Microblaze architectures. Signed-off-by: Grant Likely Acked-by: Michal Simek

of: merge of_find_node_by_phandle

2010-02-09T15:32:48Z

Merge common function between powerpc, sparc and microblaze. Code is identical for powerpc and microblaze, but adds a lock (and release) of the devtree_lock on sparc. Signed-off-by: Jeremy Kerr Signed-off-by: Grant Likely

of: merge of_attach_node() & of_detach_node()

2010-02-09T15:32:42Z

Merge common code between PowerPC and Microblaze Signed-off-by: Grant Likely Tested-by: Wolfram Sang Acked-by: Benjamin Herrenschmidt

of: unify phandle name in struct device_node

2010-01-28T21:06:53Z

In struct device_node, the phandle is named 'linux_phandle' for PowerPC and MicroBlaze, and 'node' for SPARC. There is no good reason for the difference, it is just an artifact of the code diverging over a couple of years. This patch renames both to simply .phandle. Note: the .node also existed in PowerPC/MicroBlaze, but the only user seems to be arch/powerpc/platforms/powermac/pfunc_core.c. It doesn't look like the assignment between .linux_phandle and .node is significantly different enough to warrant the separate code paths unless ibm,phandle properties actually appear in Apple device trees. I think it is safe to eliminate the old .node property and use phandle everywhere. Signed-off-by: Grant Likely Acked-by: David S. Miller Tested-by: Wolfram Sang Acked-by: Benjamin Herrenschmidt