powerpc: Fix bus_space_unmap

Previously it failed to compile since the macro passed too many
arguments to the function. Fix by adding the bus handle to the
function and adding an implementation tha

powerpc: Fix bus_space_unmap

Previously it failed to compile since the macro passed too many
arguments to the function. Fix by adding the bus handle to the
function and adding an implementation that calls pmap_unmapdev.

Reviewed by: jhibbits
Differential Revision: https://reviews.freebsd.org/D43440

show more ...

sys: Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.

Discussed with: pfg
MFC After: 3 days
Sponsored by: Netflix

show more ...

[PowerPC] bus_space cleanup part 2: Convert to c99 initializers.

To make it easier to work with this in the future, convert to c99
designated initializer syntax.

Tested on powerpc, powerpc64, and p

[PowerPC] bus_space cleanup part 2: Convert to c99 initializers.

To make it easier to work with this in the future, convert to c99
designated initializer syntax.

Tested on powerpc, powerpc64, and powerpc64le. No functional change.

Sponsored by: Tag1 Consulting, Inc.

show more ...

[PowerPC] bus_space cleanup part 1 - rename bs_be / bs_le functions

The intention of the bus_be naming was for those to be the no-endian-swapping
and for the bus_le to be endian-swapping in all the

[PowerPC] bus_space cleanup part 1 - rename bs_be / bs_le functions

The intention of the bus_be naming was for those to be the no-endian-swapping
and for the bus_le to be endian-swapping in all the functions.

This naming breaks down when we're actually are running in LE and need to
use the opposite sense.

As such, rename bs_be_* to native_bs_* and rename bs_le_* to swapped_bs_*.

No functional change.

Sponsored by: Tag1 Consulting, Inc.

show more ...

[PowerPC64LE] Bus space prep for LE

Swap the BE and LE bus_space tags when on LE, and adjust the nexus tag
to match.

This is prep for a a followup that makes the powerpc bus_space macros easier
to

[PowerPC64LE] Bus space prep for LE

Swap the BE and LE bus_space tags when on LE, and adjust the nexus tag
to match.

This is prep for a a followup that makes the powerpc bus_space macros easier
to maintain in the future.

Sponsored by: Tag1 Consulting, Inc.

show more ...

powerpc: clean up empty lines in .c and .h files

Move the powerpc64 direct map base address from zero to high memory. This
accomplishes a few things:
- Makes NULL an invalid address in the kernel, which is useful for catching
bugs.
- Lays groundw

Move the powerpc64 direct map base address from zero to high memory. This
accomplishes a few things:
- Makes NULL an invalid address in the kernel, which is useful for catching
bugs.
- Lays groundwork for radix-tree translation on POWER9, which requires the
direct map be at high memory.
- Similarly lays groundwork for a direct map on 64-bit Book-E.

The new base address is chosen as the base of the fourth radix quadrant
(the minimum kernel address in this translation mode) and because all
supported CPUs ignore at least the first two bits of addresses in real
mode, allowing direct-map addresses to be used in real-mode handlers.
This is required by Linux and is part of the architecture standard
starting in POWER ISA 3, so can be relied upon.

Reviewed by: jhibbits, Breno Leitao
Differential Revision: D14499

show more ...

PPC64: implement missing busdma ops

Add missing little-endian 64-bit read and write. Since there
is no direct ASM opcode for this, perform byte swap if
necessary.

Created by: Wojciech Ma

PPC64: implement missing busdma ops

Add missing little-endian 64-bit read and write. Since there
is no direct ASM opcode for this, perform byte swap if
necessary.

Created by: Wojciech Macek <wma@semihalf.com>
Obtained from: Semihalf
Sponsored by: QCM Technologies

show more ...

sys/powerpc: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - e

sys/powerpc: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

show more ...

Correct pa argument type for pmap_kenter_attr()

Physical addresses are vm_paddr_t, not vm_offset_t. This can make a difference
when sizeof(vm_offset_t) != sizeof(vm_paddr_t).

Remove TNF license clauses 3 and 4, matching upstream

Approved by raj@ (Semihalf has a copyright statement in the license block
as well).

Interrelated improvements to early boot mappings:
- Remove explicit requirement that the SOC registers be found except as an
optimization (although the MPC85XX LAW drivers still require they be fou

Interrelated improvements to early boot mappings:
- Remove explicit requirement that the SOC registers be found except as an
optimization (although the MPC85XX LAW drivers still require they be found
externally, which should change).
- Remove magic CCSRBAR_VA value.
- Allow bus_machdep.c's early-boot code to handle non 1:1 mappings and
systems not in real-mode or global 1:1 maps in early boot.
- Allow pmap_mapdev() on Book-E to reissue previous addresses if the
area is already mapped. Additionally have it check all mappings, not
just the CCSR area.

This allows the console on e500 systems to actually work on systems where
the boot loader was not kind enough to set up a 1:1 mapping before starting
the kernel.

show more ...

Replace eieio; sync for creating bus-space memory barriers with sync.
sync performs a strict superset of the functions of eieio, so using both
is redundant. While here, expand bus barriers to all bus

Replace eieio; sync for creating bus-space memory barriers with sync.
sync performs a strict superset of the functions of eieio, so using both
is redundant. While here, expand bus barriers to all bus_space operations,
since many drivers do not correctly use bus_space_barrier().

In principle, we can also replace sync just with eieio, for a significant
performance increase, but it remains to be seen whether any poorly-written
drivers currently depend on the side effects of sync to properly function.

MFC after: 1 week

show more ...

Enforce a memory barrier in stream operations, as is done on other
bus_space calls. This makes ath(4) work correctly on PowerPC.

Submitted by: adrian
Tested by: andreast
MFC after: 3 days

Add support for memory attributes (pmap_mapdev_attr() and friends) on
PowerPC/AIM. This is currently stubbed out on Book-E, since I have no
idea how to implement it there.

MFppc64:

Check if devices are direct-mapped individually instead of just checking
the value of hw_direct_map.

Provide 64-bit big endian bus space operations for PowerPC. They are required
for the upcoming sec(4) driver.

Submitted by: Piotr Ziecik
Obtained from: Semihalf

Reimplement bs_be_rs_{1|2|4} and bs_le_rs_{1|2|4} by not
calling the inline functions in <machine/pio.h> and do
not add synchronization. Implement bs_gen_barrier() as
eieio and sync.

Add support for 64-bit PowerPC CPUs operating in the 64-bit bridge mode
provided, for example, on the PowerPC 970 (G5), as well as on related CPUs
like the POWER3 and POWER4.

This also adds support

Add support for 64-bit PowerPC CPUs operating in the 64-bit bridge mode
provided, for example, on the PowerPC 970 (G5), as well as on related CPUs
like the POWER3 and POWER4.

This also adds support for various built-in hardware found on Apple G5
hardware (e.g. the IBM CPC925 northbridge).

Reviewed by: grehan

show more ...

Redefine bus_space_tag_t on PowerPC from a 32-bit integral to
a pointer to struct bus_space. The structure contains function
pointers that do the actual bus space access.

The reason for this change

Redefine bus_space_tag_t on PowerPC from a 32-bit integral to
a pointer to struct bus_space. The structure contains function
pointers that do the actual bus space access.

The reason for this change is that previously all bus space
accesses were little endian (i.e. had an explicit byte-swap
for multi-byte accesses), because all busses on Macs are little
endian.
The upcoming support for Book E, and in particular the E500
core, requires support for big-endian busses because all
embedded peripherals are in the native byte-order.

With this change, there's no distinction between I/O port
space and memory mapped I/O. PowerPC doesn't have I/O port
space. Busses assign tags based on the byte-order only.
For that purpose, two global structures exist (bs_be_tag and
bs_le_tag), of which the address can be taken to get a valid
tag.

Obtained from: Juniper, Semihalf

show more ...

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.

Discussed with: pfg
MFC After: 3 days
Sponsored by: Netflix

show more ...

[PowerPC] bus_space cleanup part 2: Convert to c99 initializers.

To make it easier to work with this in the future, convert to c99
designated initializer syntax.

Tested on powerpc, powerpc64, and p

[PowerPC] bus_space cleanup part 2: Convert to c99 initializers.

To make it easier to work with this in the future, convert to c99
designated initializer syntax.

Tested on powerpc, powerpc64, and powerpc64le. No functional change.

Sponsored by: Tag1 Consulting, Inc.

show more ...

[PowerPC] bus_space cleanup part 1 - rename bs_be / bs_le functions

The intention of the bus_be naming was for those to be the no-endian-swapping
and for the bus_le to be endian-swapping in all the

[PowerPC] bus_space cleanup part 1 - rename bs_be / bs_le functions

The intention of the bus_be naming was for those to be the no-endian-swapping
and for the bus_le to be endian-swapping in all the functions.

This naming breaks down when we're actually are running in LE and need to
use the opposite sense.

As such, rename bs_be_* to native_bs_* and rename bs_le_* to swapped_bs_*.

No functional change.

Sponsored by: Tag1 Consulting, Inc.

show more ...

[PowerPC64LE] Bus space prep for LE

Swap the BE and LE bus_space tags when on LE, and adjust the nexus tag
to match.

This is prep for a a followup that makes the powerpc bus_space macros easier
to

[PowerPC64LE] Bus space prep for LE

Swap the BE and LE bus_space tags when on LE, and adjust the nexus tag
to match.

This is prep for a a followup that makes the powerpc bus_space macros easier
to maintain in the future.

Sponsored by: Tag1 Consulting, Inc.

show more ...