kernel.git/arch/powerpc/kernel/prom.c, branch linux-2.6.24.y

[POWERPC] 4xx: Workaround for the 440EP(x)/GR(x) processors identical PVR issue.

2007-11-01T12:13:43Z

PowerPC 440EP(x) 440GR(x) processors have the same PVR values, since they have identical cores. However, FPU is not supported on GR(x) and enabling APU instruction broadcast in the CCR0 register (to enable FPU) may cause unpredictable results. There's no safe way to detect FPU support at runtime. This patch provides a workarund for the issue. We use a POWER6 "logical PVR approach". First, we identify all EP(x) and GR(x) processors as GR(x) ones (which is safe). Then we check the device tree cpu path. If we have a EP(x) processor entry, we call identify_cpu again with PVR | 0x8. This bit is always 0 in the real PVR. This way we enable FPU only for 440EP(x). Signed-off-by: Valentine Barshak Signed-off-by: Josh Boyer

[POWERPC] Use cache-inhibited large page bit from firmware

2007-10-09T11:00:48Z

Discussions with firmware architects have confirmed that the bit in the ibm,pa-features property that indicates support for cache-inhibited large (>= 64kB) page mappings does in fact mean that the hypervisor allows 64kB mappings to I/O devices. Thus we can now enable the code that tests that bit and sets our CPU_FTR_CI_LARGE_PAGE feature bit. Signed-off-by: Paul Mackerras

[POWERPC] setup_64.c and prom.c comment cleanup

2007-09-13T15:33:24Z

Grammatical corrections to comments. Signed-off-by: Linas Vepstas Signed-off-by: Paul Mackerras

[POWERPC] prom.c whitespace cleanup

2007-09-13T15:33:24Z

Whitespace cleanup: badly indented lines. Signed-off-by: Linas Vepstas Signed-off-by: Paul Mackerras

[POWERPC] Clean out a bunch of duplicate includes

2007-08-17T01:01:51Z

This removes several duplicate includes from arch/powerpc/. Signed-off-by: Jesper Juhl Acked-by: Benjamin Herrenschmidt Signed-off-by: Paul Mackerras

[POWERPC] of_detach_node()'s device node argument cannot be const

2007-07-22T11:30:59Z

...since it modifies it (when it sets the OF_DETACHED flag). Signed-off-by: Segher Boessenkool Signed-off-by: Paul Mackerras

Consolidate of_find_node_by routines

2007-07-20T03:39:06Z

This consolidates the routines of_find_node_by_path, of_find_node_by_name, of_find_node_by_type and of_find_compatible_device. Again, the comparison of strings are done differently by Sparc and PowerPC and also these add read_locks around the iterations. Signed-off-by: Stephen Rothwell Acked-by: Paul Mackerras Acked-by: David S. Miller

Consolidate of_get_next_child

2007-07-20T03:34:26Z

This adds a read_lock around the child/next accesses on Sparc. Signed-off-by: Stephen Rothwell Acked-by: Paul Mackerras Acked-by: David S. Miller

Consolidate of_get_parent

2007-07-20T03:32:58Z

This requires creating dummy of_node_{get,put} routines for sparc and sparc64. It also adds a read_lock around the parent accesses. Signed-off-by: Stephen Rothwell Acked-by: Paul Mackerras Acked-by: David S. Miller

Consolidate of_find_property

2007-07-20T03:32:24Z

The only change here is that a readlock is taken while the property list is being traversed on Sparc where it was not taken previously. Also, Sparc uses strcasecmp to compare property names while PowerPC uses strcmp. Signed-off-by: Stephen Rothwell Acked-by: Paul Mackerras Acked-by: David S. Miller