mirror of
https://gitlab.rtems.org/rtems/rtos/rtems.git
synced 2025-12-05 15:15:44 +00:00
2007-01-29 Till Straumann <strauman@slac.stanford.edu>
* shared/vme/VMEConfig.h: Added more comments about the semantics of the various symbols BSPs should define in this file. Removed declarations of BSP_VMEInit(), BSP_VMEIrqMgrInstall(). * shared/vme/vmeconfig.c: declare BSP_VMEInit(), BSP_VMEIrqMgrInstall() here. * Makefile.am, shared/vme/README, * shared/vme/vme_universe_dma.c (added): Added glue code implementing the VMEDMA.h API using the vmeUniverse driver.
This commit is contained in:
Till Straumann
@@ -1,3 +1,17 @@
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2007-01-29 Till Straumann <strauman@slac.stanford.edu>
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* shared/vme/VMEConfig.h:
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Added more comments about the semantics of the various
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symbols BSPs should define in this file.
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Removed declarations of BSP_VMEInit(), BSP_VMEIrqMgrInstall().
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* shared/vme/vmeconfig.c: declare BSP_VMEInit(),
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BSP_VMEIrqMgrInstall() here.
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* Makefile.am, shared/vme/README,
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* shared/vme/vme_universe_dma.c (added): Added glue code
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implementing the VMEDMA.h API using the vmeUniverse driver.
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2007-01-19 Till Straumann <strauman@slac.stanford.edu>
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* mvme5500/Makefile.am, mvme5500/preinstall.am,
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@@ -62,8 +62,10 @@ EXTRA_DIST += shared/tod/todcfg.c
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EXTRA_DIST += shared/vectors/vectors_init.c shared/vectors/vectors.S
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## shared/vme
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EXTRA_DIST += shared/vme/vmeconfig.c shared/vme/VMEConfig.h
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shared/vme/README shared/vme/vme_universe.c
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EXTRA_DIST += shared/vme/vmeconfig.c shared/vme/VMEConfig.h \
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shared/vme/README shared/vme/vmeconfig.c \
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shared/vme/README shared/vme/vme_universe.c \
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shared/vme/README shared/vme/vme_universe_dma.c
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include $(top_srcdir)/../../../automake/subdirs.am
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include $(top_srcdir)/../../../automake/local.am
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@@ -1,9 +1,10 @@
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VME.h: VME API; BSP and bridge-chip independent
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libbsp/shared/vmeUniverse/VME.h: VME API; BSP and bridge-chip independent
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VMEConfig.h: defines BSP specific constants for VME configuration
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vmeconfig.c configures the VME bridge using the VME.h API calls
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and BSP specific constants from VMEConfig.h.
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Independent of the bridge chip, however.
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vme_universe.c: implements VME.h for the vmeUniverse driver.
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vme_universe_dma.c: implements VMEDMA.h for the vmeUniverse driver.
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o other universe BSP --> use its own vmeConfig.h; may reuse vmeconfig.c, vme_universe.c
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o other universe BSP --> use its own VMEConfig.h; may reuse vmeconfig.c, vme_universe.c
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o other non-universe BSP --> use its own VMEConfig.h and vme_xxx.c; may reuse vmeconfig.c
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@@ -48,6 +48,7 @@
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*
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* ------------------ SLAC Software Notices, Set 4 OTT.002a, 2004 FEB 03
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*/
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/*
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* The BSP maps VME address ranges into
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* one BAT.
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@@ -60,6 +61,10 @@
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* If this is undefined, no extra BAT will be
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* configured and VME has to share the available
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* PCI address space with PCI devices.
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*
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* If you do define BSP_VME_BAT_IDX you must
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* make sure the corresponding BAT is really
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* available and unused!
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*/
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#if defined(mvme2100)
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@@ -75,30 +80,107 @@
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#endif
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/* start of the A32 window on the VME bus
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* TODO: this should perhaps be a configuration option
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* TODO: this should perhaps be a run-time configuration option
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*/
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#define _VME_A32_WIN0_ON_VME 0x20000000
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/* if _VME_DRAM_OFFSET is defined, the BSP
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* will map our RAM onto the VME bus, starting
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* will map the board RAM onto the VME bus, starting
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* at _VME_DRAM_OFFSET
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*/
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#define _VME_DRAM_OFFSET 0xc0000000
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/* Tell the interrupt manager that the universe driver
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* already called openpic_eoi() and that this step hence
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* must be omitted.
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/* Define BSP_PCI_VME_DRIVER_DOES_EOI to let the vmeUniverse
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* driver (Tsi148 driver doesn't implement this) implement
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* VME IRQ priorities in software.
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*
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* Here's how this works:
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*
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* 1) VME IRQ happens
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* 2) universe propagates IRQ to PCI/PPC/main interrupt
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* controller ('PIC' - programmable interrupt controller).
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* 3) PIC driver dispatches universe driver's ISR
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* 4) universe driver ISR acknowledges IRQ on VME,
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* determines VME vector.
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* ++++++++++++ stuff between ++ signs is related to SW priorities +++++++++
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* 5) universe driver *masks* all VME IRQ levels <= interrupting
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* level.
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* 6) universe driver calls PIC driver's 'EOI' routine.
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* This effectively re-enables PCI and hence higher
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* level VME interrupts.
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* 7) universe driver dispatches user VME ISR.
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*
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* ++>> HIGHER PRIORITY VME IRQ COULD HAPPEN HERE and would be handled <<++
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*
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* 8) user ISR returns, universe driver re-enables lower
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* level VME interrupts, returns.
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* 9) universe driver ISR returns control to PIC driver
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* 10) PIC driver *omits* regular EOI sequence since this
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* was already done by universe driver (step 6).
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* ++++++++++++ end of special handling (SW priorities) ++++++++++++++++++++
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* 11) PIC driver ISR dispatcher returns.
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*
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* Note that the BSP *MUST* provide the following hooks
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* in order for this to work:
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* a) bsp.h must define the symbol BSP_PIC_DO_EOI to
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* a sequence of instructions that terminates an
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* interrupt at the interrupt controller.
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* b) The interrupt controller driver must check the
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* interrupt source and *must omit* running the EOI
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* sequence if the interrupt source is the vmeUniverse
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* (because the universe driver already ran BSP_PIC_DO_EOI)
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* The interrupt controller must define the variable
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*
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* int _BSP_vme_bridge_irq = -1;
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*
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* which is assigned the universe's interrupt line information
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* by vme_universe.c:BSP_VMEIrqMgrInstall(). The interrupt
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* controller driver may use this variable to determine
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* if an IRQ was caused by the universe.
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*
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* c) define BSP_PCI_VME_DRIVER_DOES_EOI
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*
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* NOTE: If a) and b) are not implemented by the BSP
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* BSP_PCI_VME_DRIVER_DOES_EOI must be *undefined*.
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*/
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#define BSP_PCI_VME_DRIVER_DOES_EOI
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/* don't reference vmeUniverse0PciIrqLine directly here - leave it up to
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* bspstart() to set BSP_vme_bridge_irq. That way, we can generate variants
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* of the BSP with / without the universe driver...
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#ifdef BSP_PCI_VME_DRIVER_DOES_EOI
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/* don't reference vmeUniverse0PciIrqLine directly from the irq
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* controller driver - leave it up to BSP_VMEIrqMgrInstall() to
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* set _BSP_vme_bridge_irq. That way, we can avoid linking
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* the universe driver if VME is unused...
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*/
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extern int _BSP_vme_bridge_irq;
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#endif
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extern int BSP_VMEInit();
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extern int BSP_VMEIrqMgrInstall();
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/* If your BSP requires a non-standard way to configure
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* the VME interrupt manager then define the symbol
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*
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* BSP_VME_UNIVERSE_INSTALL_IRQ_MGR
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*
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* to a proper instruction sequence that installs the
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* universe interrupt manager. This requires knowledge
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* of the wiring between the universe and the PIC (main
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* interrupt controller), i.e., which IRQ 'pins' of the
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* universe are wired to which 'lines'/inputs at the PIC.
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* (consult vmeUniverse.h for more information).
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*
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* When installing the universe IRQ manager it is also
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* possible to specify whether it should try to share
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* PIC interrupts with other sources. This might not
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* be supported by all BSPs (but the unverse driver
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* recognizes that).
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*
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* If BSP_VME_UNIVERSE_INSTALL_IRQ_MGR is undefined then
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* the default algorithm is used (vme_universe.c):
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*
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* This default setup uses only a single wire. It reads
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* the PIC 'line' from PCI configuration space and assumes
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* this to be wired to the first (LIRQ0) IRQ input at the
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* universe. The default setup tries to use interrupt
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* sharing.
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*/
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#include <bsp/motorola.h>
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#include <bsp/pci.h>
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146
c/src/lib/libbsp/powerpc/shared/vme/vme_universe_dma.c
Normal file
146
c/src/lib/libbsp/powerpc/shared/vme/vme_universe_dma.c
Normal file
@@ -0,0 +1,146 @@
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/* $Id$ */
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/* Implementation of the VMEDMA.h API for the BSP using the vmeUniverse driver */
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/*
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* Authorship
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* ----------
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* This software was created by
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* Till Straumann <strauman@slac.stanford.edu>, 2006, 2007
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* Stanford Linear Accelerator Center, Stanford University.
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*
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* Acknowledgement of sponsorship
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* ------------------------------
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* This software was produced by
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* the Stanford Linear Accelerator Center, Stanford University,
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* under Contract DE-AC03-76SFO0515 with the Department of Energy.
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*
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* Government disclaimer of liability
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* ----------------------------------
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* Neither the United States nor the United States Department of Energy,
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* nor any of their employees, makes any warranty, express or implied, or
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* assumes any legal liability or responsibility for the accuracy,
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* completeness, or usefulness of any data, apparatus, product, or process
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* disclosed, or represents that its use would not infringe privately owned
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* rights.
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*
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* Stanford disclaimer of liability
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* --------------------------------
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* Stanford University makes no representations or warranties, express or
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* implied, nor assumes any liability for the use of this software.
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*
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* Stanford disclaimer of copyright
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* --------------------------------
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* Stanford University, owner of the copyright, hereby disclaims its
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* copyright and all other rights in this software. Hence, anyone may
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* freely use it for any purpose without restriction.
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*
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* Maintenance of notices
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* ----------------------
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* In the interest of clarity regarding the origin and status of this
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* SLAC software, this and all the preceding Stanford University notices
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* are to remain affixed to any copy or derivative of this software made
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* or distributed by the recipient and are to be affixed to any copy of
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* software made or distributed by the recipient that contains a copy or
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* derivative of this software.
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*
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* ------------------ SLAC Software Notices, Set 4 OTT.002a, 2004 FEB 03
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*/
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#include <stdint.h>
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#include <rtems.h>
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#include <bsp.h>
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#include <bsp/VME.h>
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#include <bsp/VMEDMA.h>
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#include <bsp/vmeUniverse.h>
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#include <bsp/vmeUniverseDMA.h>
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#include <bsp/bspVmeDmaList.h>
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int
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BSP_VMEDmaSetup(int channel, uint32_t bus_mode, uint32_t xfer_mode, void *custom_setup)
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{
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return vmeUniverseDmaSetup(channel, bus_mode, xfer_mode, custom_setup);
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}
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int
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BSP_VMEDmaStart(int channel, uint32_t pci_addr, uint32_t vme_addr, uint32_t n_bytes)
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{
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return vmeUniverseDmaStart(channel, pci_addr, vme_addr, n_bytes);
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}
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uint32_t
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BSP_VMEDmaStatus(int channel)
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{
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return vmeUniverseDmaStatus(channel);
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}
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BSP_VMEDmaListDescriptor
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BSP_VMEDmaListDescriptorSetup(
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BSP_VMEDmaListDescriptor d,
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uint32_t attr_mask,
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uint32_t xfer_mode,
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uint32_t pci_addr,
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uint32_t vme_addr,
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uint32_t n_bytes)
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{
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VMEDmaListClass pc;
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if ( !d ) {
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pc = &vmeUniverseDmaListClass;
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return BSP_VMEDmaListDescriptorNewTool(
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pc,
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attr_mask,
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xfer_mode,
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pci_addr,
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vme_addr,
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n_bytes);
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}
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return BSP_VMEDmaListDescriptorSetupTool(d, attr_mask, xfer_mode, pci_addr, vme_addr, n_bytes);
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}
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int
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BSP_VMEDmaListStart(int channel, BSP_VMEDmaListDescriptor list)
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{
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return BSP_VMEDmaListDescriptorStartTool(0, channel, list);
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}
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/* NOT thread safe! */
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int
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BSP_VMEDmaInstallISR(int channel, BSP_VMEDmaIRQCallback cb, void *usr_arg)
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{
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int vec;
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BSP_VME_ISR_t curr;
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void *carg;
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if ( channel != 0 )
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return -1;
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vec = UNIV_DMA_INT_VEC;
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curr = BSP_getVME_isr(vec, &carg);
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if ( cb && curr ) {
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/* IRQ currently in use */
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return -1;
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}
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if ( !cb && !curr ) {
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/* Allow uninstall if no handler is currently installed;
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* just make sure IRQ is disabled
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*/
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BSP_disableVME_int_lvl(vec);
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return 0;
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}
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if ( cb ) {
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if ( BSP_installVME_isr(vec, (BSP_VME_ISR_t)cb, usr_arg) )
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return -4;
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BSP_enableVME_int_lvl(vec);
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} else {
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BSP_disableVME_int_lvl(vec);
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if ( BSP_removeVME_isr(vec, curr, carg) )
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return -4;
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}
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return 0;
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}
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@@ -55,6 +55,9 @@
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#include <libcpu/bat.h>
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#include <rtems/bspIo.h>
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extern int BSP_VMEInit();
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extern int BSP_VMEIrqMgrInstall();
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/* Use a weak alias for the VME configuration.
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* This permits individual applications to override
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* this routine.
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