mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 20:53:53 +08:00
217bbd8188
Based on an original patch from Michael Schmitz:
Because mem_init() is now called before device init, devices that rely on
ST-RAM may find all ST-RAM already allocated to other users by the time
device init happens. In particular, a large initrd RAM disk may use up
enough of ST-RAM to cause atari_stram_alloc() to resort to
__get_dma_pages() allocation.
In the current state of Atari memory management, all of RAM is marked
DMA capable, so __get_dma_pages() may well return RAM that is not in actual
fact DMA capable. Using this for frame buffer or SCSI DMA buffer causes
subtle failure.
The ST-RAM allocator has been changed to allocate memory from a pool of
reserved ST-RAM of configurable size, set aside on ST-RAM init (i.e.
before mem_init()). As long as this pool is not exhausted, allocation of
real ST-RAM can be guaranteed.
Other changes:
- Replace the custom allocator in the ST-RAM pool by the existing allocator
in the resource subsystem,
- Remove mem_init_done and its hook, as memory init is now done before
device init,
- Remove /proc/stram, as ST-RAM usage now shows up under /proc/iomem, e.g.
005f2000-006f1fff : ST-RAM Pool
005f2000-0063dfff : atafb
0063e000-00641fff : ataflop
00642000-00642fff : SCSI
Signed-off-by: Michael Schmitz <schmitz@debian.org>
[Andreas Schwab <schwab@linux-m68k.org>: Use memparse()]
[Geert: Use the resource subsystem instead of a custom allocator]
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
412 lines
14 KiB
Plaintext
412 lines
14 KiB
Plaintext
config GENERIC_IOMAP
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bool
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default y
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config ARCH_MAY_HAVE_PC_FDC
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bool
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depends on BROKEN && (Q40 || SUN3X)
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default y
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config ARCH_USES_GETTIMEOFFSET
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def_bool y
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config EISA
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bool
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---help---
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The Extended Industry Standard Architecture (EISA) bus was
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developed as an open alternative to the IBM MicroChannel bus.
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The EISA bus provided some of the features of the IBM MicroChannel
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bus while maintaining backward compatibility with cards made for
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the older ISA bus. The EISA bus saw limited use between 1988 and
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1995 when it was made obsolete by the PCI bus.
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Say Y here if you are building a kernel for an EISA-based machine.
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Otherwise, say N.
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config MCA
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bool
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help
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MicroChannel Architecture is found in some IBM PS/2 machines and
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laptops. It is a bus system similar to PCI or ISA. See
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<file:Documentation/mca.txt> (and especially the web page given
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there) before attempting to build an MCA bus kernel.
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config PCMCIA
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tristate
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---help---
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Say Y here if you want to attach PCMCIA- or PC-cards to your Linux
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computer. These are credit-card size devices such as network cards,
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modems or hard drives often used with laptops computers. There are
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actually two varieties of these cards: the older 16 bit PCMCIA cards
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and the newer 32 bit CardBus cards. If you want to use CardBus
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cards, you need to say Y here and also to "CardBus support" below.
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To use your PC-cards, you will need supporting software from David
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Hinds' pcmcia-cs package (see the file <file:Documentation/Changes>
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for location). Please also read the PCMCIA-HOWTO, available from
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<http://www.tldp.org/docs.html#howto>.
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To compile this driver as modules, choose M here: the
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modules will be called pcmcia_core and ds.
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config AMIGA
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bool "Amiga support"
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select MMU_MOTOROLA if MMU
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help
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This option enables support for the Amiga series of computers. If
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you plan to use this kernel on an Amiga, say Y here and browse the
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material available in <file:Documentation/m68k>; otherwise say N.
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config ATARI
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bool "Atari support"
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select MMU_MOTOROLA if MMU
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help
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This option enables support for the 68000-based Atari series of
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computers (including the TT, Falcon and Medusa). If you plan to use
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this kernel on an Atari, say Y here and browse the material
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available in <file:Documentation/m68k>; otherwise say N.
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config MAC
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bool "Macintosh support"
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select MMU_MOTOROLA if MMU
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help
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This option enables support for the Apple Macintosh series of
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computers (yes, there is experimental support now, at least for part
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of the series).
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Say N unless you're willing to code the remaining necessary support.
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;)
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config NUBUS
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bool
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depends on MAC
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default y
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config M68K_L2_CACHE
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bool
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depends on MAC
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default y
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config APOLLO
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bool "Apollo support"
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select MMU_MOTOROLA if MMU
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help
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Say Y here if you want to run Linux on an MC680x0-based Apollo
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Domain workstation such as the DN3500.
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config VME
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bool "VME (Motorola and BVM) support"
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select MMU_MOTOROLA if MMU
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help
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Say Y here if you want to build a kernel for a 680x0 based VME
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board. Boards currently supported include Motorola boards MVME147,
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MVME162, MVME166, MVME167, MVME172, and MVME177. BVME4000 and
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BVME6000 boards from BVM Ltd are also supported.
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config MVME147
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bool "MVME147 support"
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depends on VME
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help
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Say Y to include support for early Motorola VME boards. This will
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build a kernel which can run on MVME147 single-board computers. If
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you select this option you will have to select the appropriate
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drivers for SCSI, Ethernet and serial ports later on.
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config MVME16x
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bool "MVME162, 166 and 167 support"
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depends on VME
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help
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Say Y to include support for Motorola VME boards. This will build a
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kernel which can run on MVME162, MVME166, MVME167, MVME172, and
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MVME177 boards. If you select this option you will have to select
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the appropriate drivers for SCSI, Ethernet and serial ports later
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on.
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config BVME6000
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bool "BVME4000 and BVME6000 support"
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depends on VME
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help
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Say Y to include support for VME boards from BVM Ltd. This will
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build a kernel which can run on BVME4000 and BVME6000 boards. If
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you select this option you will have to select the appropriate
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drivers for SCSI, Ethernet and serial ports later on.
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config HP300
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bool "HP9000/300 and HP9000/400 support"
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select MMU_MOTOROLA if MMU
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help
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This option enables support for the HP9000/300 and HP9000/400 series
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of workstations. Support for these machines is still somewhat
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experimental. If you plan to try to use the kernel on such a machine
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say Y here.
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Everybody else says N.
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config DIO
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bool "DIO bus support"
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depends on HP300
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default y
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help
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Say Y here to enable support for the "DIO" expansion bus used in
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HP300 machines. If you are using such a system you almost certainly
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want this.
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config SUN3X
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bool "Sun3x support"
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select MMU_MOTOROLA if MMU
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select M68030
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help
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This option enables support for the Sun 3x series of workstations.
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Be warned that this support is very experimental.
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Note that Sun 3x kernels are not compatible with Sun 3 hardware.
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General Linux information on the Sun 3x series (now discontinued)
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is at <http://www.angelfire.com/ca2/tech68k/sun3.html>.
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If you don't want to compile a kernel for a Sun 3x, say N.
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config Q40
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bool "Q40/Q60 support"
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select MMU_MOTOROLA if MMU
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help
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The Q40 is a Motorola 68040-based successor to the Sinclair QL
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manufactured in Germany. There is an official Q40 home page at
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<http://www.q40.de/>. This option enables support for the Q40 and
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Q60. Select your CPU below. For 68LC060 don't forget to enable FPU
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emulation.
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config SUN3
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bool "Sun3 support"
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depends on !MMU_MOTOROLA
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select MMU_SUN3 if MMU
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select M68020
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help
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This option enables support for the Sun 3 series of workstations
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(3/50, 3/60, 3/1xx, 3/2xx systems). Enabling this option requires
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that all other hardware types must be disabled, as Sun 3 kernels
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are incompatible with all other m68k targets (including Sun 3x!).
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If you don't want to compile a kernel exclusively for a Sun 3, say N.
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config NATFEAT
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bool "ARAnyM emulator support"
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depends on ATARI
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help
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This option enables support for ARAnyM native features, such as
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access to a disk image as /dev/hda.
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config NFBLOCK
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tristate "NatFeat block device support"
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depends on BLOCK && NATFEAT
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help
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Say Y to include support for the ARAnyM NatFeat block device
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which allows direct access to the hard drives without using
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the hardware emulation.
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config NFCON
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tristate "NatFeat console driver"
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depends on NATFEAT
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help
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Say Y to include support for the ARAnyM NatFeat console driver
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which allows the console output to be redirected to the stderr
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output of ARAnyM.
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config NFETH
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tristate "NatFeat Ethernet support"
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depends on NET_ETHERNET && NATFEAT
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help
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Say Y to include support for the ARAnyM NatFeat network device
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which will emulate a regular ethernet device while presenting an
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ethertap device to the host system.
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comment "Processor type"
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config M68020
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bool "68020 support"
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help
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If you anticipate running this kernel on a computer with a MC68020
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processor, say Y. Otherwise, say N. Note that the 68020 requires a
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68851 MMU (Memory Management Unit) to run Linux/m68k, except on the
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Sun 3, which provides its own version.
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config M68030
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bool "68030 support"
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depends on !MMU_SUN3
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help
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If you anticipate running this kernel on a computer with a MC68030
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processor, say Y. Otherwise, say N. Note that a MC68EC030 will not
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work, as it does not include an MMU (Memory Management Unit).
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config M68040
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bool "68040 support"
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depends on !MMU_SUN3
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help
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If you anticipate running this kernel on a computer with a MC68LC040
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or MC68040 processor, say Y. Otherwise, say N. Note that an
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MC68EC040 will not work, as it does not include an MMU (Memory
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Management Unit).
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config M68060
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bool "68060 support"
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depends on !MMU_SUN3
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help
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If you anticipate running this kernel on a computer with a MC68060
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processor, say Y. Otherwise, say N.
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config MMU_MOTOROLA
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bool
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config MMU_SUN3
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bool
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depends on MMU && !MMU_MOTOROLA
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config M68KFPU_EMU
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bool "Math emulation support (EXPERIMENTAL)"
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depends on EXPERIMENTAL
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help
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At some point in the future, this will cause floating-point math
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instructions to be emulated by the kernel on machines that lack a
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floating-point math coprocessor. Thrill-seekers and chronically
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sleep-deprived psychotic hacker types can say Y now, everyone else
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should probably wait a while.
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config M68KFPU_EMU_EXTRAPREC
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bool "Math emulation extra precision"
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depends on M68KFPU_EMU
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help
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The fpu uses normally a few bit more during calculations for
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correct rounding, the emulator can (often) do the same but this
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extra calculation can cost quite some time, so you can disable
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it here. The emulator will then "only" calculate with a 64 bit
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mantissa and round slightly incorrect, what is more than enough
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for normal usage.
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config M68KFPU_EMU_ONLY
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bool "Math emulation only kernel"
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depends on M68KFPU_EMU
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help
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This option prevents any floating-point instructions from being
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compiled into the kernel, thereby the kernel doesn't save any
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floating point context anymore during task switches, so this
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kernel will only be usable on machines without a floating-point
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math coprocessor. This makes the kernel a bit faster as no tests
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needs to be executed whether a floating-point instruction in the
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kernel should be executed or not.
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config ADVANCED
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bool "Advanced configuration options"
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---help---
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This gives you access to some advanced options for the CPU. The
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defaults should be fine for most users, but these options may make
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it possible for you to improve performance somewhat if you know what
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you are doing.
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Note that the answer to this question won't directly affect the
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kernel: saying N will just cause the configurator to skip all
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the questions about these options.
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Most users should say N to this question.
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config RMW_INSNS
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bool "Use read-modify-write instructions"
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depends on ADVANCED
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---help---
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This allows to use certain instructions that work with indivisible
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read-modify-write bus cycles. While this is faster than the
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workaround of disabling interrupts, it can conflict with DMA
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( = direct memory access) on many Amiga systems, and it is also said
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to destabilize other machines. It is very likely that this will
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cause serious problems on any Amiga or Atari Medusa if set. The only
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configuration where it should work are 68030-based Ataris, where it
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apparently improves performance. But you've been warned! Unless you
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really know what you are doing, say N. Try Y only if you're quite
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adventurous.
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config SINGLE_MEMORY_CHUNK
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bool "Use one physical chunk of memory only" if ADVANCED && !SUN3
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default y if SUN3
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select NEED_MULTIPLE_NODES
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help
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Ignore all but the first contiguous chunk of physical memory for VM
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purposes. This will save a few bytes kernel size and may speed up
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some operations. Say N if not sure.
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config 060_WRITETHROUGH
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bool "Use write-through caching for 68060 supervisor accesses"
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depends on ADVANCED && M68060
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---help---
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The 68060 generally uses copyback caching of recently accessed data.
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Copyback caching means that memory writes will be held in an on-chip
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cache and only written back to memory some time later. Saying Y
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here will force supervisor (kernel) accesses to use writethrough
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caching. Writethrough caching means that data is written to memory
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straight away, so that cache and memory data always agree.
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Writethrough caching is less efficient, but is needed for some
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drivers on 68060 based systems where the 68060 bus snooping signal
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is hardwired on. The 53c710 SCSI driver is known to suffer from
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this problem.
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config ARCH_DISCONTIGMEM_ENABLE
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def_bool !SINGLE_MEMORY_CHUNK
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config NODES_SHIFT
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int
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default "3"
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depends on !SINGLE_MEMORY_CHUNK
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config ZORRO
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bool "Amiga Zorro (AutoConfig) bus support"
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depends on AMIGA
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help
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This enables support for the Zorro bus in the Amiga. If you have
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expansion cards in your Amiga that conform to the Amiga
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AutoConfig(tm) specification, say Y, otherwise N. Note that even
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expansion cards that do not fit in the Zorro slots but fit in e.g.
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the CPU slot may fall in this category, so you have to say Y to let
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Linux use these.
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config AMIGA_PCMCIA
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bool "Amiga 1200/600 PCMCIA support (EXPERIMENTAL)"
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depends on AMIGA && EXPERIMENTAL
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help
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Include support in the kernel for pcmcia on Amiga 1200 and Amiga
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600. If you intend to use pcmcia cards say Y; otherwise say N.
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config HEARTBEAT
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bool "Use power LED as a heartbeat" if AMIGA || APOLLO || ATARI || MAC ||Q40
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default y if !AMIGA && !APOLLO && !ATARI && !MAC && !Q40 && HP300
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help
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Use the power-on LED on your machine as a load meter. The exact
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behavior is platform-dependent, but normally the flash frequency is
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a hyperbolic function of the 5-minute load average.
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# We have a dedicated heartbeat LED. :-)
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config PROC_HARDWARE
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bool "/proc/hardware support"
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help
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Say Y here to support the /proc/hardware file, which gives you
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access to information about the machine you're running on,
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including the model, CPU, MMU, clock speed, BogoMIPS rating,
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and memory size.
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config ISA
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bool
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depends on Q40 || AMIGA_PCMCIA
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default y
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help
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Find out whether you have ISA slots on your motherboard. ISA is the
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name of a bus system, i.e. the way the CPU talks to the other stuff
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inside your box. Other bus systems are PCI, EISA, MicroChannel
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(MCA) or VESA. ISA is an older system, now being displaced by PCI;
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newer boards don't support it. If you have ISA, say Y, otherwise N.
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config GENERIC_ISA_DMA
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bool
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depends on Q40 || AMIGA_PCMCIA
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default y
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source "drivers/pci/Kconfig"
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source "drivers/zorro/Kconfig"
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