u-boot.git/include/asm-ppc/mmu.h, branch master

Move architecture-specific includes to arch/$ARCH/include/asm

2010-04-13T07:13:12+00:00

This helps to clean up the include/ directory so that it only contains
non-architecture-specific headers and also matches Linux's directory
layout which many U-Boot developers are already familiar with.

Signed-off-by: Peter Tyser

mpc86xx: set the DDR BATs after calculating true DDR size

2010-03-30T15:50:22+00:00

After determining how much DDR is actually in the system, set DBAT0 and
IBAT0 accordingly.  This ensures that the CPU won't attempt to access
(via speculation) addresses outside of actual memory.

On 86xx systems, DBAT0 and IBAT0 (the BATs for DDR) are initialized to 2GB
and kept that way.  If the system has less than 2GB of memory (typical for
an MPC8610 HPCD), the CPU may attempt to access this memory during
speculation.  The zlib code is notorious for generating such memory reads,
and indeed on the MPC8610, uncompressing the Linux kernel causes a machine
check (without this patch).

Currently we are limited to power of two sized DDR since we only use a
single bat.  If a non-power of two size is used that is less than
CONFIG_MAX_MEM_MAPPED u-boot will crash.

Signed-off-by: Timur Tabi 
Signed-off-by: Kumar Gala

ppc/85xx: Add tracking of TLB CAM usage

2010-01-05T19:49:08+00:00

We need to track which TLB CAM entries are used to allow us to
"dynamically" allocate entries later in the code.  For example the SPD
DDR code today hard codes which TLB entries it uses.  We can now make
that pick entries that are free.

Signed-off-by: Kumar Gala

Fix "ppc/85xx: Clean up use of LAWAR defines" breakage

2009-09-24T23:02:52+00:00

Commit 002741ae86 modified include/asm-ppc/mmu.h such that the LAWAR_
defines were only enabled for the 83xx platform, but they are also
needed on MPC512x system. Enabling these for E300 systems seems thus
more appropriate.

Signed-off-by: Wolfgang Denk

ppc/85xx: Clean up use of LAWAR defines

2009-09-24T17:04:58+00:00

On 85xx platforms we shouldn't be using any LAWAR_* defines
but using the LAW_* ones provided by fsl-law.h.  Rename any such
uses and limit the LAWAR_ to the 83xx platform as the only user so
we will get compile errors in the future.

Signed-off-by: Kumar Gala

ppc/85xx: Repack tlb_table to save space

2009-09-16T02:30:09+00:00

We can pack the initial tlb_table in MAS register format and use
write_tlb to set things up.  This savings can be helpful for NAND
style first stage boot loaders.

Signed-off-by: Kumar Gala

ppc/85xx: Introduce low level write_tlb function

2009-09-16T02:30:08+00:00

Factor out the code we use to actually write a tlb entry.

set_tlb is a logical view of the TLB while write_tlb is a low level
matching the MAS registers.

Signed-off-by: Kumar Gala

ppc/85xx: Add a simple function to search the TLB

2009-09-08T14:10:05+00:00

Allow us to search the TLB array based on an address.  This is useful
if we want to change an entry but dont know where it happens to be
located.

For example, the boot page mapping we use on MP or the flash TLB that
we change the WIMGE settings for after we've relocated.

Signed-off-by: Kumar Gala

mpc86xx: Add support to populate addr map based on BATs

2009-02-09T23:29:49+00:00

If CONFIG_ADDR_MAP is enabled, update the address map
whenever we write a bat.

Signed-off-by: Becky Bruce

powerpc: Move duplicated BAT defines to mmu.h

2009-02-09T23:27:40+00:00

The BAT fields are architected; there's no need for these to be in
cpu-specific files.  Drop the duplication and move these to
include/asm-ppc/mmu.h.  Also, remove the BL_xxx defines that were only
used by the alaska board, and switch to using the BATU_BL_xxx defines
used by all the other boards.  The BL_ defines previously in use
had to be shifted into the proper position for use, which was inefficient.

Signed-off-by: Becky Bruce